Technical field
[0001]
The present disclosure relates to a bearing device and a rotary machine for rotatably supporting the rotary shaft.
BACKGROUND
[0002]
In general, rotary machines such as steam turbines and gas turbines is provided with a bearing apparatus for rotatably supporting the rotor shaft (rotation axis). Usually, between the outer circumferential surface of the rotor shaft, the bearing surface of the bearing portion for supporting the rotor shaft, the lubricating oil is interposed in order to ensure lubrication between them.
[0003]
　For example, Patent Document 1, configured tilting pad bearings have been described to support the rotor shaft by a plurality of bearing pads arranged in the circumferential direction of the rotating shaft. In the tilting pad bearing, composed of a plurality of oil supply nozzles disposed upstream and downstream of the bearing pads, so the lubricating oil is supplied between the outer peripheral surface and the bearing surface of the bearing pads of the rotor shaft ing. Incidentally, so as to both end surfaces of the lower half carrier ring side plate is disposed to suppress the leakage of the supplied lubricating oil from outside the fueling nozzle.
CITATION
Patent Document
[0004]
Patent Document 1: WO 2010/097990 Patent
Patent Document 2: JP 2006-234147 JP
Summary of the Invention
Problems that the Invention is to Solve
[0005]
　However, in the tilting pad bearing disclosed in Patent Document 1, the oil flowing between the outer peripheral surface of the bearing surface and the rotor shaft of the bearing pads with the rotation of the rotor shaft direction from the upstream side to the downstream side, raising the temperature by friction between the bearing surface or the outer peripheral surface of the rotor shaft of the bearing pads. Therefore, since the flow of oil to frictional heat more bearing pads on the downstream side is heated to a high temperature and accumulated, the temperature rise is remarkable. Excessive temperature rise of the bearing pads because they can be one of the factors that cause malfunction of the bearing device, thereby suppressing the temperature rise of the bearing pads are required.
　In this respect, Patent Document 1 does not disclose any specific measures for suppressing the temperature rise of the bearing pads.
[0006]
　In view of the above circumstances, at least one embodiment of the present invention has an object to provide a bearing device and a rotary machine capable of effectively suppressing the temperature rise of the bearing portion.
Means for Solving the Problems
[0007]
(1) bearing device according to at least one embodiment of the present invention,
　a carrier ring,
　a first bearing portion provided along the outer circumference of the rotor shaft at the inner peripheral side of the carrier ring,
　the inner periphery of the carrier ring a second bearing portion than the first bearing portion provided along the outer periphery of the rotor shaft downstream in the rotation direction of the rotor shaft on the side,
　on both sides in the axial direction of the carrier ring, the outer periphery of the rotor shaft a pair of side plates disposed along the,
　downstream of the first bearing portion, and the second is provided on the upstream side of the bearing portion, the outer periphery of the rotor shaft and the inner peripheral surface of the first bearing part changing the flow direction of the oil passing between the surfaces, and the first oil guide portion configured to guide the oil,
　provided in the side plate of the carrier ring or each, said first oil guide depending on the part And oil discharge mouth configured to discharge the guided the oil to the outside,
characterized in that it comprises a.
[0008]
　According to the bearing apparatus of the above (1), downstream of the first bearing part, and, by the first oil guide portion provided on the upstream side of the second bearing portion, the inner peripheral surface of the first bearing part and the rotor shaft oil is guided with a change in the flow direction of the high temperature the oil passes between the outer peripheral surface of the. The hot oil which is guided by the first oil guide portion is discharged from the oil discharge port portion provided in the carrier ring or each of the side plate to the outside. Thus, at least a portion of the oil was high temperature passes between the first bearing portion and the rotor shaft is discharged to the outside does not flow between the second bearing portion and the rotor shaft. Therefore, it is possible to effectively suppress the temperature rise of the second bearing portion.
[0009]
(2) In one embodiment, in the above configuration (1),
　the first oil guide section includes a scraper disposed downstream of the first bearing portion,
　out axis direction of the upstream side end face of the scraper region of both ends in the are inclined to the axial direction so as to shift downstream in the rotation direction of the rotor shaft as axially away from the central portion in the axial direction width of the first bearing portion.
　According to the above configuration (2), between the outer peripheral surface of the inner peripheral surface and the rotor shaft of the first bearing part, hot oil flowing toward the circumferential direction of the rotor axis, changes its flow direction by the scraper is guided along the inclined surface of the scraper to the both sides in the axial direction. Therefore, it is possible to avoid the inflow of hot oil to the second bearing unit, it is possible to effectively suppress the temperature rise of the second bearing portion.
[0010]
(3) In another embodiment, in the above configuration (1),
　the first oil guide section includes an oil collecting box provided in the downstream side of the first bearing portion,
　said oil recovery box,
　　the provided on the upper surface of the oil collection box, the oil inlet opening into the gap between the inner peripheral surface and the outer peripheral surface of the rotor shaft of the first bearing portion,
　　extending in the axial direction in the interior of the oil collecting box provided to the internal flow path portion communicating with the oil inlet portion,
　　provided on the side or bottom of the oil collecting box, oil outlet for communicating with the said internal passage portion oil discharge mouth and parts,
including the.
　According to the above configuration (3), hot oil to a space between the inner and outer circumferential surfaces of the rotor shaft of the first bearing portion, flows toward the circumferential direction of the rotor axis, the oil collecting box from the oil inlet It flows into the is discharged from the oil discharge mouth through the oil outlet provided through an internal flow path portion on the side surface or the bottom of the oil collection box. Therefore, it is possible to avoid the inflow of hot oil to the second bearing unit, it is possible to effectively suppress the temperature rise of the second bearing portion.
[0011]
(4) In some embodiments, in any of the above Paragraph (1) to (3),
　the oil discharge mouth portion, downstream of the first bearing part, and, upstream of the second bearing portion It includes an opening formed in each said side plate of the side.
　According to the above configuration (4), the hot oil flowing toward the circumferential direction of the rotor axis between the inner and outer circumferential surfaces of the rotor shaft of the first bearing portion, the inner peripheral surface of the second bearing portion and before entering between the outer peripheral surface of the rotor shaft can be smoothly discharged to the outside through the opening formed in the side plate.
[0012]
(5) In some embodiments, in any of the above Paragraph (1) to (4),
　the oil discharge mouth portion, downstream of the first bearing part, and, upstream of the second bearing portion the side including the hole provided in the carrier ring.
　According to the above configuration (5), the hot oil flowing toward the circumferential direction of the rotor axis between the inner and outer circumferential surfaces of the rotor shaft of the first bearing portion, the inner peripheral surface of the second bearing portion and before entering between the outer peripheral surface of the rotor shaft can be smoothly discharged through the hole provided in the carrier ring.
[0013]
(6) In some embodiments, the (1) through at any one of the (5),
　in the region of the carrier ring side of the inner circumferential surface of each said side plate, the first bearing portion extending the range of and extending groove is formed in the circumferential direction along the side surface of the first bearing part at least in part, of the
　inner peripheral surface of the first bearing portion and the outer peripheral surface of the rotor shaft guides the oil that has flowed into the groove from the gap between the second of said fluid is configured to return between the upstream end portion of the second bearing portion and the downstream end of the first bearing part further comprising an oil guide portion.
　According to the above configuration (6), a relatively low temperature of the oil, the downstream end of the first bearing by the second oil guide section through the grooves extending in the circumferential direction along the side surface of the first bearing portion If it is set as the back between the upstream end portion of the second bearing portion. Therefore, it is possible to provide a relatively low temperature of the oil between the inner and outer circumferential surfaces of the rotor shaft of the second bearing portion can be more effectively suppress the temperature rise of the second bearing portion. Further, in the above configuration (1), in place of the oil discharged to the outside from the oil discharge mouth and flowed between the inner and outer circumferential surfaces of the rotor shaft of the first bearing portion, second oil guide it is also possible to reduce the oil supply from the outside by relatively returning cold oil by parts.
[0014]
In (7) In one embodiment, in the above configuration (6),
　the first oil guide portion and the second oil guide section includes two flow of crossing each other through different positions in the radial direction of the carrier ring It is formed by the road.
　As described above, the first oil guide section, the flow direction of the oil passing between the inner periphery and the outer periphery of the rotor shaft of the first bearing part is varied, leading to discharge oil in the external configuration It has become. On the other hand, the second oil guide portion, the oil flowing in the groove formed along the side surface of the first bearing portion is configured to return between the first bearing portion and the second bearing portion. That is, the first oil guide portion and the second oil guide section, the main stream of oil flowing toward the downstream side in the rotational direction of the rotor shaft along the outer circumferential surface of the rotor shaft, the inner peripheral surface of the first bearing part and the rotor shaft from a relatively hot oil passing between the outer peripheral surface, so that the replaced relatively low temperature of the oil flowing through the groove formed along the side surface of the first bearing portion.
　In this respect, as in the above (7), the first oil guide portion and the second oil guide section, be formed by two flow paths crossing each other, it is possible to replace the mainstream oil smoothly .
[0015]
(8) In some embodiments, in the above configuration (6) or (7),
　the second oil guide section is provided on the side plate of each as pushed out to the carrier ring side in the groove It includes was baffle wall,
　the baffle wall is closer to the carrier ring toward the downstream side in the rotational direction of the rotor shaft is inclined with respect to a direction perpendicular to the axial direction of the rotor shaft.
　According to the above configuration (8), the second oil guide portion, because it includes a baffle wall provided in each of the side plates so pushed out to the carrier ring side in the groove, the baffle wall, the oil flowing through the groove it is possible to change the flow direction so as to face the widthwise center side of the second bearing portion. Also, the rectification walls so as to approach the carrier ring toward the downstream side in the rotational direction of the rotor shaft, since the inclined with respect to the direction perpendicular to the axial direction of the rotor shaft, not inhibit the flow of oil in the groove It not smoothly can be changed flow direction.
[0016]
(9) In some embodiments, in any of the above Paragraph (6) to (8),
　said second oil guide portion, between the oil inlet bore and oil outlet holes respectively opening to said groove includes an internal flow path provided inside the side plate so as to communicate,
　the oil inlet hole is provided so as to be positioned on a side of the first bearing portion,
　said oil outlet hole, the first It is provided in the circumferential position between the upstream end portion of the second bearing portion and the downstream end of the bearing portion.
　According to the above configuration (9), without inhibiting the flow of relatively hot oil is discharged from the oil discharge port portion is guided by the first oil guide portion, the second oil guide section, of the side plate through the internal flow path, it can be guided to the oil flowing through the groove from the side of the first bearing portion to the upstream end of the second bearing portion.
[0017]
(10) In some embodiments, in any of the above Paragraph (6) to (9),
　the groove in the circumferential direction range including the extended range of the first bearing and the second bearing portion extends along the outer periphery of the rotor shaft.
　According to the above configuration (10), through a groove provided on the side plate in the circumferential direction range including the extending range of the first bearing portion and a second bearing portion, leaked into the side of the first bearing portion it can be guided to the downstream side relatively low temperature of the oil toward the upstream end of the second bearing portions.
[0018]
In (11) some embodiments, in any of the above Paragraph (6) to (10),
　the full width in the axial direction of each said side plate and is W, the axial width of the groove W g was when, 0.15 W ≦ W g meet.
　Thus, it is possible to secure a sufficient flow path cross-sectional area of the groove, the relatively low temperature of the oil leaked sideways from the gap between the inner and outer circumferential surfaces of the rotor shaft of the first bearing portion it can be effectively guided to the downstream side toward the second oil guide section.
[0019]
(12) In some embodiments, in any of the above Paragraph (6) to (11),
　provided on the inner peripheral surface of each said side plate, sandwiching the downstream end of the first bearing part in further comprising a fin extending along the outer periphery of the rotor shaft on both sides in the rotational direction of the rotor shaft,
　the groove, the inner circumferential surface of the side plate of the carrier ring side than the fins and the fins and in is formed by a recess defined.
　According to the above configuration (12), by providing the fins on the inner peripheral surface of the side plate along the outer circumference of the rotor shaft, it is possible to form the groove (recess) I than with a simple configuration. Further, since the portion other than the fins of the outer peripheral surface of the side plate functions as a groove, a relatively low temperature of leaking from the gap between the inner periphery and the outer periphery of the rotor shaft of the first bearing portion to the side the flow path cross-sectional area of the groove for guiding the oil can be sufficiently secured.
[0020]
(13) In some embodiments, in any of the above Paragraph (6) to (12),
　the gap between the outer peripheral surface of the inner peripheral surface of each said side plate and said rotor shaft, said first 1 towards the at least a portion of the peripheral region of the extending range of the bearing unit, upstream of the upstream edge of the first bearing part, and, downstream of the downstream end of the second bearing portion narrower than the at least a portion of the circumferential extent.
　As mentioned above (6), at least a portion of the extending range of the first bearing part, leaking laterally from the gap between the inner periphery and the outer periphery of the rotor shaft of the first bearing portion grooves for relatively guiding the low temperature of the oil was are provided in the side plate. Therefore, as in the above (13), by a relatively small gap between the side plate inner peripheral surface and the rotor shaft outer peripheral surface at least a portion of the peripheral region of the extending range of the first bearing part, It can be suppressed relatively the low temperature of the oil is discharged to the outside through the gap in the groove. Thus, it is possible to sufficiently secure the flow rate of the relatively low temperature of the oil to be guided toward the second bearing portion by the second oil guide portion (oil flowing in the groove).
[0021]
In (14) some embodiments, in any of the above Paragraph (6) to (13),
　a bottom surface of the groove, as compared with the outer peripheral surface of the first bearing portion, in the radial direction of the carrier ring located on the inner side.
　According to the above configuration (14), the groove is positioned radially inwardly of the carrier ring from the outer circumferential surface of the first bearing, surrounded by the bottom and side surfaces and the side surface of the first bearing portion of the groove of the side plate in the space, it can accept relatively low temperature of the oil leaking sideways from the first bearing portion.
[0022]
(15) In some embodiments, in any of the above Paragraph (1) to (14),
　provided on the inner peripheral side of the upper half region of the carrier ring, to hold down the jump of the rotor shaft from above further comprising a semicircular bearing portion configured to,
　the first bearing and the second bearing portion, respectively, provided on the inner peripheral side of the lower half region of the carrier ring, supporting the rotor shaft from below a pair of bearing pads configured to.
　According to the above configuration (15), the semi-circular bearing portion on the inner peripheral side of the top of the carrier ring half region is provided, it is possible to hold down the jump of the rotor shaft by semicircular bearing portions, the rotor the breakage of the rotary machine each part by surging axis can be prevented. Further, since the first bearing and the second bearing portion in the lower half region of the carrier ring (a pair of bearing pads) are provided, it can be properly support the rotor shaft by a pair of bearing pads.
[0023]
(16) rotary machine according to at least one embodiment of the present invention,
　the bearing device according to any one of (1) to (15),
　that and a rotary shaft supported by said bearing device and features.
　According to the rotary machine of the above (16), since it is possible to suppress the temperature rise of the second bearing portion of the bearing device, smooth operation of the rotary machine becomes possible.
Effect of the invention
[0024]
　According to at least one embodiment of the present invention, since the discharging high temperature and oil to pass between the inner and outer circumferential surfaces of the rotor shaft of the first bearing portion to the outside, the second bearing portion it can be the temperature rise of effectively suppressed.
BRIEF DESCRIPTION OF THE DRAWINGS
[0025]
It is a sectional view taken along the axial direction of the bearing device according to [1] an embodiment.
It is a [FIG 2] A-A line sectional view of FIG.
3 is a perspective view showing a lower half region partially of the bearing device according to one embodiment.
It is a development view of the lower half region seen from the C direction of the bearing device shown in FIG. 4 FIG.
5 is a D-D line cross-sectional view of the lower half region of the bearing device shown in FIG.
It is a [FIG 6] E direction arrow view of the lower half region of the bearing device shown in FIG.
7 is a perspective view partially showing a lower half region of the bearing device according to another embodiment.
8 is a developed view seen from F direction lower half region of the bearing device shown in FIG.
It is a [FIG 9] G-G line cross-sectional view of the lower half region of the bearing device shown in FIG.
A line H-H cross-sectional view of the lower half region of the bearing device shown in FIG. 10 FIG.
Is [11] a cross-sectional view showing a modification of the bearing device shown in FIG. 7 (corresponding to the line G-G cross section in Fig. 7).
Is [12] a cross-sectional view showing another modified example of the bearing device shown in FIG. 7 (corresponding to the line G-G cross section in Fig. 7).
13 is a sectional view showing a configuration example of a side plate according to another embodiment.
Is [14] a cross-sectional view partially showing the lower half region of the bearing device according to another embodiment (G-G corresponding Figure 7).
A [15] cross-sectional view partially showing the lower half region of the bearing device according to another embodiment (G-G corresponding Figure 7).
DESCRIPTION OF THE INVENTION
[0026]
　Hereinafter, with reference to the accompanying drawings Some embodiments of the present invention will be described. However, the dimensions of the components shown or drawings are described as an embodiment, the material, shape, its relative positions and the like, not intended to limit the scope of the invention thereto, merely illustrative examples Absent.
　In this specification, the term "upper half", "upper half" in the terms "upper half region" etc., refers to the upper portion in the vertical direction (direction of gravity). Similarly, in the present specification, the "lower half", "lower half" in the term "lower half region" etc., refers to a lower portion of the vertical direction (direction of gravity).
[0027]
　First, with reference to FIGS. 1 and 2, a description will be given of the overall configuration of a common bearing device 10 according to some embodiments.
　Figure 1 is a cross-sectional view along the axial direction of the bearing device 10 according to one embodiment. Figure 2 is a sectional view taken along line A-A of FIG. Incidentally, FIG. 2 is a cross-section perpendicular to the axial direction. Further, the axial direction in the present embodiment, a direction of the central axis O of the rotor shaft 2 which is supported by the bearing device 10, the radial is the radius direction of the rotor shaft 2, and the circumferential rotor shaft 2 which is in the circumferential direction.
[0028]
　Bearing device 10 shown in FIGS. 1 and 2, a lubrication system tilting pad bearing that employs a direct lubrication system as (lubrication system) (journal bearing), the first bearing portion in the lower half area (first bearing pad 30 ) and a second bearing portion (second bearing pad 32) has a deployed configuration. Hereinafter, will be exemplified bearing device 10 illustrated, the bearing apparatus 10 according to the present embodiment is not limited to this configuration. For example, the bearing device 10 according to another embodiment, may be a thrust bearing, as the lubricating system, may be employed an oil bath method or other lubrication method. Also, in other embodiments, are further arranged two bearing pads in the upper half area, may be configured to circumferentially total of four bearing pads are attached, in the lower half area 3 may be configured to more than five bearing pads are attached.
[0029]
　As the rotary machine 1 bearing device 10 according to this embodiment is applied, (steam turbine, for example a nuclear power plant) gas turbines, steam turbines and mechanical drive turbine or the like of the turbine, wind machines, such as wind power generation device, or the like supercharger and the like.
　Here, the rotary machine 1 includes a rotor shaft 2 that is rotationally driven, and a bearing housing that houses the rotor shaft 2 (not shown), a bearing device 10 for supporting the rotor shaft 2, a.
[0030]
　In one embodiment, the bearing apparatus 10 includes a carrier ring 11 which is attached to the bearing housing of the rotary machine 1 (not shown), a first bearing pad 30 and a second bearing pad at the inner peripheral side of the carrier ring 11 equipped with 32 and, the.
[0031]
　The bearing device 10 is further provided with a structure for suppressing the temperature rise of the second bearing pads 32, the first oil guide portion 40, 50 and oil discharge port 42, 52 a (see FIGS. 3 to 7) . It will be described later configuration including a first oil guide portion 40, 50 and oil discharge port 42 and 52.
[0032]
　Hereinafter, a description will be given of a specific configuration example of each member of the bearing device 10.
　The carrier ring 11 includes upper half carrier ring 12 and the lower half carrier ring 13. Upper half carrier ring 12 and the lower half carrier ring 13, respectively, has a cross section perpendicular to the axial direction inner peripheral surface 12a such that the semicircular arc, 13a and the outer peripheral surface 12b, and 13b. In the illustrated example, although the carrier ring 11 indicates a split structure in the upper half carrier ring 12 and the lower half carrier ring 13, the carrier ring 11 may be an integral structure.
[0033]
　The both ends in the axial direction of the carrier ring 11, along the outer circumference of the rotor shaft 2, a pair of side plates 17, 18 are arranged. Side plates 17, 18 is formed in a disc shape, a hole rotor shaft 2 passes through the center is formed. These side plates 17, 18 are adapted to appropriately suppress the leakage of the lubricating oil of an external supplied from below to the fueling nozzle 25-28.
[0034]
　Upper half carrier ring 12 is primarily to hold down the jump of the rotor shaft 2 from above, the guide metal (semi-circular bearing portions) 20 and 21 attached to the inner circumferential surface 12a. For example, inwardly in the axial direction than and side plates 17, 18 in the axial direction of both ends of the upper half carrier ring 12, a pair of guide metals 20, 21 are attached. Guide metal 20 and 21, it is formed in a semicircular shape.
　Thus, the guide metal 20, 21 on the inner peripheral side of the upper half carrier ring 12 is provided, bounce of the rotor shaft 2 by a guide metal 20, 21 can be held down, and due to the bounce of the rotor shaft 2 it is possible to prevent the parts of the damage. Incidentally, when the carrier ring 11, if an integral structure rather than being divided into upper half carrier ring 12 and the lower half-carrier ring 13 structure, or a split structure 3 above, the guide metal 20, 21 it may be provided on a half area on the carrier ring 11.
[0035]
　The upper half carrier ring 12 and the lower half carrier ring 13, at least one of the fuel supply nozzle 25 to 28 are provided.
　In the example shown in FIG. 2, when the rotor shaft 2 is rotated clockwise as shown in FIG arrow S, the rotor shaft 2 in the rotational direction S first fueling nozzle 25 from the upstream side in the second fueling nozzle 26, the 3 fueling nozzle 27, a total of four oil supply nozzles include a fourth oil supply nozzle 28 is provided. The first fueling nozzle 25 and the second oil supply nozzle 26, upstream of the first bearing pad 30 located on the upstream side, are arranged in the circumferential direction. It may be a gap is provided between the second oil supply nozzle 26 and the upstream end portion of the bearing pads 30. The third oil supply nozzle 27 includes a first bearing pad 30 is disposed between the second bearing pads 32 located downstream of the first bearing pad 30. A third oil supply nozzle 27 may be a gap is provided between the second bearing pad 32. The fourth oil supply nozzle 28 is disposed on the downstream side of the second bearing pad 32. A fourth oil supply nozzle 28 may be a gap is provided between the second bearing pad 32.
[0036]
　Inside the carrier ring 11, the lubricating oil supply passage (not shown) is formed. Lubricating oil supplied to lubricating oil supply path is sent to the oil supply nozzle 25 to 29 are ejected from each of the fueling nozzle 25-29 in the vicinity of the bearing pads 30 and 32.
[0037]
　First bearing pad 30 and the second bearing pad 32 is provided on the inner peripheral side of the lower half-carrier ring 13 is configured to support the rotor shaft 2 from below.
　First bearing pad 30 is provided along the outer periphery of the rotor shaft 2 at the inner peripheral side of the lower half-carrier ring 13.
　Second bearing pad 32 is provided along the outer periphery of the rotor shaft 2 on the downstream side of the first bearing pad 30 rotation direction S of the rotor shaft 2 than the inner circumferential side of the lower half-carrier ring 13.
　Thus, since the first bearing pad 30 and the second bearing pad 32 is provided in the lower half of the carrier ring 13, the rotor shaft 2 can be properly supported by the first bearing pad 30 and the second bearing pad 32.
[0038]
　Incidentally, when the carrier ring 11, if an integral structure rather than being divided into upper half carrier ring 12 and the lower half-carrier ring 13 structure, or a split structure 3 above, the first bearing pad 30 and second bearing pads 32 may be provided in the lower half region of the carrier ring 11.
　The first bearing pad 30 and the second bearing pad 32 is a intended to refer to two bearing pads adjacent to each other in the circumferential direction and does not refer to a specific bearing pads. For example, in a configuration in which the three bearing pads sequentially disposed from the upstream side in the rotational direction S, when focusing on the most upstream bearing pads and the intermediate bearing pads, the most upstream bearing pads first bearing pad 30, and the intermediate bearing pads is the second bearing pad 32. Alternatively, when focusing on the middle of the bearing pads and the most downstream bearing pads, the intermediate bearing pads first bearing pad 30, and the the most downstream bearing pads a second bearing pad 32.
[0039]
　Next, with reference to FIGS. 3 to 12, more specifically describes the structure of the first oil guide portion 40, 50 and oil discharge port 42 and 52.
[0040]
　In some embodiments, 3, 4, 7 and 8, the first oil guide portion 40 and 50, the downstream side of the first bearing pad 30, and, the second bearing pads 32 provided upstream, changing oil flow direction passing between the inner peripheral surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30 is configured to guide the oil.
　Oil discharge mouth 42, 52 provided on the carrier ring 11 (lower half of the carrier ring 13) or each of the side plates 17 and 18, for discharging the oil that has been guided by the first oil guide portion 40 and 50 to the outside It is configured to.
[0041]
　According to this configuration, the downstream side of the first bearing pad 30, and, by the first oil guide portion 40, 50 provided on the upstream side of the second bearing pads 32, and the inner peripheral surface 30a of the first bearing pad 30 oil is guided with a change in the flow direction of the oil to high temperature by passing between the outer peripheral surface of the rotor shaft 2. The hot oil which is guided by the first oil guide portion 40, 50 is discharged from the oil discharge port portion 42, 52 provided on the lower half-carrier ring 13 or each of the side plates 17 and 18 to the outside . Thus, at least a portion of the oil was high temperature passes between the first bearing pad 30 and the rotor shaft 2, between the second bearing pad 32 and the rotor shaft 2 is discharged to the outside without flowing that. Therefore, it is possible to effectively suppress the temperature rise of the second bearing pad 32.
[0042]
　Between the first oil guide portion 40, 50 the upstream end of the second bearing pads 32, the fueling nozzle (third oil supply nozzle) 27 is provided as described above. Oil ejected from the oil ejection hole 27b of the oil supply nozzle 27 is supplied between the inner peripheral surface 32a and the outer peripheral surface of the rotor shaft 2 of the second bearing pad 32. Therefore, the oil amount shortage by the oil is discharged to the outside by the first oil guide portion 40, 50 and oil discharge port 42 and 52 is compensated by the newly supplied oil from the oil supply nozzle 27. Therefore, it is possible between the inner peripheral surface 32a and the outer peripheral surface of the rotor shaft 2 of the second bearing pads 32, to supply a sufficient amount of oil that can ensure good lubrication.
[0043]
　Bearing apparatus 10 in one embodiment, the region of the lower half-carrier ring 13 side of the inner peripheral surface of each of the side plates 17 and 18, the first bearing at least a part of the extending range of the first bearing pad 30 grooves 17b extending in the circumferential direction along the side surface of the pad 30, 18b are formed. For example, the grooves 17b, 18b, the protruding portions 17a provided on the inner peripheral surface of each of the side plates 17, 18, 18a and, projecting portion 17a, below the 18a halves carrier ring 13 side side plate 17, 18 is formed by a recess defined in an inner circumferential surface of the. Protrusions 17a, 18a extend along the outer periphery of the rotor shaft 2 on both sides in the rotational direction S of the rotor shaft 2 across the downstream end of the first bearing pad 30. Thus, the protruding portion 17a on the inner peripheral surface of the side plates 17, 18 along the outer circumference of the rotor shaft 2, by providing the 18a, groove I than with a simple structure (the recess) 17b, forming a 18b can.
[0044]
　Grooves 17b, 18b are in the circumferential direction range including the extending range of the first bearing pad 30 and the second bearing pads 32 may extend along the outer periphery of the rotor shaft 2.
　Thus, the first bearing pad 30 and the second extending range groove 17b provided in the side plates 17, 18 in the circumferential direction range including the bearing pads 32, via 18b, on the side of the first bearing pad 30 can be guided to the downstream side at a relatively low temperature of the oil leaked toward the upstream end of the second bearing pad 32.
[0045]
　Grooves 17b, 18b of the bottom surface (surface facing the outer circumferential surface of the rotor shaft 2), as compared to the first outer peripheral surface 30b of the bearing pad 30, positioned on the inner side in the radial direction of the lower half-carrier ring 13.
　According to this configuration, since the groove 17b, 18b are arranged radially inward of the outer peripheral surface 30b of the first bearing pad 30, the oil flowing groove 17b, and 18b flows into the outer peripheral surface 30b of the first bearing pad 30 prevent that.
　Incidentally, the grooves 17b, 18b bottom of, as compared to the outer circumferential surface 32b of the second bearing pads 32 may be located inward in the radial direction of the lower half-carrier ring 13.
[0046]
　Further, as shown in FIGS. 4 and 8, and the total width in the axial direction of each of the side plates 17, 18 is W, the grooves 17b, 18b of the axial width of W g when a, 0.15 W ≦ W g of it may be satisfied.
　Thus, it is possible to secure the groove 17b, the flow path cross-sectional area of the 18b sufficiently, leaking laterally from the gap between the inner peripheral surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30 it can be effectively guided to the downstream side at a relatively low temperature of the oil toward the second oil guide portion 60.
[0047]
　As shown in FIGS. 3 to 12, in some embodiments, the bearing device 10, in addition to the above configuration, further comprising a second oil guide section 60, 70.
　The second oil guide portion 60 and 70, the first gap from the groove 17b between the inner peripheral surface 30a and the outer peripheral surface of the rotor shaft 2 of the bearing pads 30, the oil that has flowed into the 18b guides, the first bearing pad 30 It is configured to return the oil between the upstream end of the downstream end portion and a second bearing pad 32.
[0048]
　According to the above arrangement, the groove 17b extending in the circumferential direction along the side surface of the first bearing pad 30, a relatively low temperature of the oil flowing 18b is, the second oil guide portion 60, 70 of the first bearing pad 30 It has as the back between the downstream end and the upstream end portion of the second bearing pad 32. Therefore, relatively low temperature of the oil can be supplied more effectively suppress the temperature rise of the second bearing pad 32 between the inner peripheral surface 32a and the outer peripheral surface of the rotor shaft 2 of the second bearing pads 32 . Further, instead of the oil discharged from the first oil discharge mouth 42 and 52 have flows between the outer circumferential surface of the inner peripheral surface 30a and the rotor shaft 2 of the bearing pad 30 to the outside, the second oil guide portion 60 , by returning a relatively low temperature of the oil by 70, it is also possible to reduce the oil supply amount to be supplied from the outside through the oil supply nozzle 27.
[0049]
　As shown in FIGS. 3 and 7, in one embodiment, the first oil guide portion 40, 50 and the second oil guide section 60, 70 to each other through different positions in the radial direction of the lower half carrier ring 13 It is formed by two flow paths intersecting (first flow path 43, 53 and the second flow path 63 and 73).
　The first flow path 43, 53 is formed by the first oil guide section 40,50. Hot oil that has passed between the inner peripheral surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30, by passing through the first flow path 43 and 53, along the rotation direction S of the rotor shaft 2 flow direction changes from the main flow flowing through, is guided to the oil discharge mouth 42 and 52. On the other hand, the second flow path 63 and 73 is formed by the second oil guide section 60, 70. Relatively low temperature of the oil flowing through the groove 17b, the inside 18b along the rotational direction S (side flow), by passing through the second passage 63 and 73, between the first bearing pad 30 and the second bearing pads 32 It is returned to the mainstream. That is, the first oil guide portion 40, 50 and the second oil guide section 60, 70, the main flow of oil flowing toward the downstream side in the rotation direction S of the rotor shaft 2 along the outer circumferential surface of the rotor shaft 2, the 1 bearing a relatively high temperature of the oil passes between the inner peripheral surface 30a and the outer peripheral surface of the rotor shaft 2 of the pad 30, the first bearing groove 17b formed along the side surface of the pad 30, relatively flowing 18b It is adapted to replace the low temperature of the oil.
　Therefore, as in the above-described configuration, first the oil guide portion 40, 50 and the second oil guide section 60, 70, two flow paths crossing each other (the first flow path 43, 53 and the second flow path 63, if formed by 73), it is possible to replace the mainstream oil smoothly.
[0050]
　In one embodiment, the gap between the inner and outer circumferential surfaces of the rotor shaft 2 of each of the side plates 17, 18, the direction of at least a portion of the peripheral region of the extending range of the first bearing pad 30 , upstream of the upstream edge of the first bearing pad 30, and is narrower than at least a portion of the circumferential extent of the downstream side of the downstream end portion of the second bearing pad 32.
　Accordingly, the oil from the first opposite sides of the side plates 17, 18 of the bearing pad 30 is prevented from leaking to the outside, the oil between the inner peripheral surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30 it is possible to secure the amount.
[0051]
　Subsequently, the bearing unit 10 according to the embodiment, respectively will be described in detail.
[0052]
　Figure 3 is a perspective view showing a lower half region of the bearing apparatus 10 according to an embodiment partially. Figure 4 is a developed view from direction C of the lower half region of the bearing apparatus 10 shown in FIG. Figure 5 is a D-D line cross-sectional view of the lower half region of the bearing apparatus 10 shown in FIG. Figure 6 is a E direction arrow view of the lower half region of the bearing apparatus 10 shown in FIG.
[0053]
　In the bearing apparatus 10 according to one embodiment, the first oil guide portion 40 includes a scraper 41 provided on the downstream side of the first bearing pad 30.
　Scraper 41, the main flow direction of oil flowing between the inner circumferential surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30 is changed, it is configured to direct the oil to the oil discharge port portion 42 there. Region of both ends in the out direction of the upstream end face of the scraper 41 is axially so as to shift to the downstream side in the rotation direction S of the rotor shaft 2 as axially away from the central portion in the axial direction width of the first bearing pad 30 inclined surface 41a inclined with respect to, has become 41a. Scraper 41 may be fastened by bolts (not shown) to the lower half-carrier ring 13. Further, another scraper 41 may be provided in the downstream side of the second bearing pad 32. In this case, other scraper 41 provided on the downstream side of the second bearing pad 32 includes a downstream and the same structure as the scraper 41 provided on the upstream side of the second bearing pad 32 of the first bearing pad 30 .
[0054]
　Oil discharge mouth 42 comprises a downstream side of the first bearing pad 30, and an opening 42a formed in each of the side plates 17, 18 at the upstream side of the second bearing pad 32. Specifically, the protruding portion 17a formed in the side plates 17, 18, 18a, the downstream side of the first bearing pad 30, and has interrupted at the upstream side of the second bearing pads 32, the protruding portions 17a, 18a interrupted end protrudes toward the axially inward from the protrusion 17c, 18c and the projections 17d, 18 d are provided for. Protrusion 17c and protrusion 17d are circumferentially spaced openings 42a are formed by the inner peripheral surface of the respective wall surfaces of the convex portion 17c and the projections 17d and the side plate 17. Similarly, protrusion 18c and protrusion 18d are circumferentially spaced openings 42a are formed by the inner peripheral surface of the respective wall surfaces of the convex portion 18c and the projections 18d and the side plates 18 .
[0055]
　According to the above arrangement, hot oil to between the inner peripheral surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30, flows toward the circumferential direction of the rotor shaft 2, its flow direction by the scraper 41 changes are allowed, guided inclined surface 41a of the scraper 41, along 41a to both sides in the axial direction. Therefore, it is possible to avoid the inflow of hot oil to the second bearing pad 32, it is possible to effectively suppress the temperature rise of the second bearing pad 32. Also, the hot oil flowing toward the circumferential direction of the rotor shaft 2 between the inner peripheral surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30, the inner peripheral surface 32a and the rotor of the second bearing pads 32 before entering between the outer peripheral surface of the shaft 2 can be smoothly discharged through the opening 42a formed in the side plates 17, 18.
[0056]
　On the other hand, the second oil guide portion 60, the groove 17b, the internal flow path provided inside the side plates 17, 18 so as to communicate between the oil inlet hole 44 and the oil outlet hole 45 respectively open to 18b ( including a second flow path 63). Oil inlet hole 44 is provided so as to be positioned on the side of the first bearing pad 30. Specifically, the oil inlet bore 44, grooves 17b, are open to 18b of the bottom surface (surface facing the rotor), are provided at least one. Oil outlet hole 45 is provided in the circumferential position between the downstream end of the first bearing pad 30 and the upstream end of the second bearing pad 32. Specifically, the oil outlet holes 45, grooves 17b, are open to 18b of the bottom surface (surface facing the rotor), are provided at least one. Further, if the oil supply nozzle 27 in the vicinity is provided, the oil outlet holes 45, downstream from the fueling nozzle 27 in the rotational direction S, and may be provided on the upstream side of the second bearing pads 32 . In the illustrated example, the second flow path 63 includes a plurality of first radial passage 63a extending from a plurality of oil inlet aperture 44 radially outward, radially outward from a plurality of oil outlet holes 45 a plurality of second radial flow passages 63b extending respectively in communication with the plurality of first radial flow passages 63a and the plurality of second radial flow passages 63b, 1 pieces of circumferential flow extending in the circumferential direction and it includes a road-63c, a.
　According to this arrangement, without obstructing the flow of relatively hot oil is discharged from the oil discharge port portion 42 is guided by the first oil guide portion 40, the second oil guide portion 60, the side plate 17, 18 through the internal flow path (second flow path 63) of the can lead groove 17b, the oil flow through 18b from the side of the first bearing pad 30 to the upstream end of the second bearing pad 32.
[0057]
　Figure 7 is a perspective view showing a lower half region of the bearing device 10 according to another embodiment partially. Figure 8 is a developed view seen from F direction lower half region of the bearing apparatus 10 shown in FIG. Figure 9 is a line G-G cross-sectional view of the lower half region of the bearing apparatus 10 shown in FIG. Figure 10 is a line H-H cross-sectional view of the lower half region of the bearing apparatus 10 shown in FIG. Figure 11 is a sectional view showing a modification of the bearing apparatus 10 shown in FIG. 7 (corresponding to the line G-G cross section in Fig. 7). Figure 12 is a cross-sectional view showing another modified example of the bearing apparatus 10 shown in FIG. 7 (corresponding to the line G-G cross section in Fig. 7).
[0058]
　In the bearing apparatus 10 according to another embodiment, the first oil guide portion 50 includes an oil collecting box 51 provided on the downstream side of the first bearing pad 30.
　Oil recovery box 51 has an oil inlet portion 51a provided on the upper surface of the oil collecting box 51, and an internal flow path portion 51b provided inside of the oil collecting box 51, side or bottom of the oil collecting box 51 It has an oil outlet portion 51c that is provided, to. Oil collecting box 51, to the lower half-carrier ring 13 may be fastened with bolts 58.
[0059]
　Oil inlet 51a is open to a gap between the inner peripheral surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30. Then, hot oil flowing between the inner circumferential surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30 is adapted to flow from the oil inlet 51a inside the oil recovery box 51.
　Internal flow passage portion 51b communicates with the oil inlet 51a, is provided so as to extend axially inside the oil recovery box 51. In the illustrated example, the internal flow path portion 51b is configured to extend toward the oil inlet 51a radially outward and extend in the axial direction in the interior of the oil collecting box 51. Hot oil flowing from the oil inlet 51a is adapted to flow through the internal flow path portion 51b.
　Oil outlet 51c is configured so as to communicate the internal passage section 51b and the oil discharge opening 52. Hot oil flowing through the internal flow path portion 51b is adapted to be discharged outside from the oil discharge port portion 52 via the oil outlet 51c.
[0060]
　In another embodiment shown in FIGS. 7 to 10, the oil outlet portion 51c is formed so as to penetrate the side surface of the oil collecting box 51 in the axial direction. On the other hand, the side plates 17 and 18, corresponding to the oil outlet 51c, the oil discharge mouth 52 which is formed through the side plates 17, 18 in the axial direction is provided. That is, all of the flow path of the internal passage section 51b to the oil discharge port portion 52 via the oil outlet 51c extends in the axial direction. In this arrangement, hot oil flowing between the inner circumferential surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30 is introduced from the oil inlet 51a to the internal flow path portion 51b, the internal flow path portion 51b It is discharged to the outside from the oil discharge mouth 52 through the oil outlet 51c from.
[0061]
　In the modification shown in FIG. 11, the oil outlet portion 51c is formed so as to penetrate the side surface of the oil collecting box 51 in the axial direction. On the other hand, the side plates 17 and 18, corresponding to the oil outlet 51c, the oil discharge port portion 52 is formed. The oil discharge port portion 52, the axial oil drain passage 52a that is formed so as to extend axially from the plane of the side plates 17, 18 facing the oil collecting box 51, the axial oil drain passage 52a including between radial oil discharge passage 52b extending from the end radially outward, the. In this arrangement, hot oil flowing between the inner circumferential surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30 is introduced from the oil inlet 51a to the internal flow path portion 51b, the internal flow path portion 51b after flowing axially to axially discharge oil passage 52a through the oil outlet 51c from flowing radially through the radial oil drain passage 52b is discharged to the outside.
[0062]
　In another modification shown in FIG. 12, the oil outlet portion 51c is formed so as to pass through the bottom of the oil collecting box 51 in the radial direction. On the other hand, the lower half carrier ring 13, in response to the oil outlet 51c, the oil discharge port portion 52 is formed. Oil discharge mouth 52, at least part of the region is connected to the oil outlet 51c, including a hole extending along the radial direction. In this arrangement, hot oil flowing between the inner circumferential surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30 is introduced from the oil inlet 51a to the internal flow path portion 51b, the internal flow path portion 51b is discharged to the outside flows through the oil outlet 51c and the oil discharge opening 52 of the bottom surface radially outward from the.
[0063]
　With these configurations, hot oil to between the inner peripheral surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30, flows toward the circumferential direction of the rotor shaft 2, the oil from the oil inlet 51a flows into the collecting box 51, is discharged from the oil discharge port portion 52 via the oil outlet 51c which is provided through the internal flow path portion 51b on the side surface or the bottom surface of the oil collecting box 51. Therefore, it is possible to avoid the inflow of hot oil to the second bearing pad 32, it is possible to effectively suppress the temperature rise of the second bearing pad 32.
[0064]
　Returning to FIGS. 7-10, in some embodiments, the second oil guide portion 70 is provided on each of the side plates 17, 18 as pushed out groove 17b, the lower half-carrier ring 13 side in the 18b It was including the rectification wall 71.
　Baffle wall 71, so as to approach the lower half carrier ring 13 toward the downstream side in the rotation direction S of the rotor shaft 2 has an inclined surface 71a inclined with respect to the direction perpendicular to the axial direction of the rotor shaft 2 ing. In the example shown, baffle wall 71, in plan view (F direction arrow in Figure 7), one side has a triangular shape is an inclined surface 71a. Alternatively, although not shown baffle wall 71 may be formed in a plate shape having an inclined surface 71a. Further, in the illustrated example, the inclined surface 71a has a planar shape. Alternatively, although not shown inclined surface 71a may be a curved surface convex to the downstream side in the rotational direction S in a plan view.
[0065]
　According to the above configuration, the second oil guide portion 70, a groove 17b, because it includes a rectifying wall 71 provided on each of the side plates 17, 18 as pushed out in the lower half of the carrier ring 13 side within 18b, the baffle wall 71 can be varied so as to face the flow direction of oil flowing groove 17b, and 18b in the width direction center side of the second bearing pad 32. Also, baffle wall 71, so as to approach the lower half carrier ring 13 toward the downstream side in the rotation direction S of the rotor shaft 2, an inclined surface 71a inclined with respect to the direction perpendicular to the axial direction of the rotor shaft 2 since it has, it can be changed smoothly flow direction without inhibiting the flow of oil in the groove 17b, 18b.
[0066]
　As described above, according to the embodiment of the present invention, and to discharge the high temperature and oil passes through between the inner peripheral surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30 to the outside since, it is possible to effectively suppress the temperature rise of the second bearing pad 32.
[0067]
　The present invention is not limited to the embodiments described above, the form and adding a modification to the embodiments described above, also includes appropriate combination form these forms.
　For example, in one embodiment shown in FIGS. 3 to 6 adopts the configuration of the first oil guide portion 40 comprising a scraper 41, instead of the first oil guide portion 40, FIGS. 7 to 12 the configuration of the first oil guide portion 50 comprising an oil collecting box 51 may be employed in another embodiment shown in. Further, in an embodiment shown in FIGS. 3 to 6 adopts the configuration of the second oil guide portion 60 including an internal passage in the side plates 17, 18, the second oil guide portion 60 Alternatively, a configuration may be adopted in the second oil guide portion 70 including a baffle wall 71 of another embodiment shown in FIGS. 7 to 12. Thus, the components of one embodiment shown in FIGS. 3 to 6, a component of another embodiment shown in FIGS. 7 to 12 may be combined as appropriate.
[0068]
　Further, in the embodiment shown in FIGS. 3 to 12, the projecting portion 17a provided on the side plates 17, 18, the groove 17b by 18a, while 18b is formed, as shown in FIG. 13, the side plate 17 it may be formed with a groove 17b by the fins 17a 'provided. Here, FIG. 13 is a sectional view taken along the axial direction of the side plate 17 in another embodiment. 3 and 7 mentioned above, and with reference to FIG. 13, the fins 17a 'are provided on the inner peripheral surface of the side plate 17, the rotation of the rotor shaft 2 across the downstream end of the first bearing pad 30 extending along the outer periphery of the rotor shaft 2 in both sides in the direction. The groove 17b is formed by a recess defined in an inner circumferential surface of the fin and 17a 'and the fins 17a' below half the carrier ring 13 of the side plate 17. Although the side plate 18 is omitted in the figure, the grooves 18b are formed by the fins also in the side plate 18. According to this configuration, by providing the fins 17a 'to the inner circumferential surface of the side plates 17, 18 along the outer circumference of the rotor shaft 2, it is possible to form the groove (recess) I than with a simple configuration. Further, the gap between the for sites other than the fins 17a 'of the outer peripheral surface of the side plates 17 and 18 function as the grooves 17b, 18b, the inner peripheral surface 30a and the outer peripheral surface of the rotor shaft 2 of the first bearing pad 30 groove 17b for guiding the relatively low temperature of the oil leaked into the side, the flow path cross-sectional area of ​​the 18b can be sufficiently secured from.
[0069]
　Furthermore, in the embodiment shown in FIGS. 3 to 12, the first oil guide portion 40, 50 and oil discharge port 42 and 52 is provided between the first bearing pad 30 and the second bearing pads 32 the first oil guide portion 40, 50 and oil discharge port 42 and 52 may be installed between any of the bearing portion adjacent (20,21,30,32).
　For example, as shown in FIGS. 14 and 15, semi-circular bearing portions (guide metal 20, 21) and of the plurality of bearing portions including a bearing pad (30, 32), two bearing portions adjacent in the circumferential direction a first oil guide portion 40, 50 and oil discharge port 42 and 52 may be provided between. In the exemplary embodiment shown in FIG. 14, between the semi-circular bearing portion (guide metal 20, 21) and the first bearing pad 30, between the first bearing pad 30 and the second bearing pads 32, and, the first oil guide portion 40 and the oil discharge opening 42 is provided between the second bearing pad 32 and the semi-circular bearing portions (guide metal 20, 21). Further, in the exemplary embodiment shown in FIG. 14, between the semi-circular bearing portion (guide metal 20, 21) and the first bearing pad 30, between the first bearing pad 30 and the second bearing pads 32, and, the first oil guide portion 50 and the oil discharge opening 52 is provided between the second bearing pad 32 and the semi-circular bearing portions (guide metal 20, 21).
[0070]
　For example, "in a certain direction", "an along the direction", "parallel", "orthogonal", "center", representation of the relative or absolute configuration, such as "concentric" or "coaxial" is strictly such not place the representative only, tolerance, or is intended to refer also state that the same function is relatively displaced at an angle and distance of a degree obtained.
　For example, representation of the things such as "the same", "equal to" and "homogeneous" is equal condition, not only represents a strictly equal conditions, tolerance, or varying degrees of the same functions can be obtained It is intended to refer also existing set of conditions.
　For example, representation of the shape such as a quadrangular shape or a cylindrical shape not only represent the shape of a quadrangular shape or a cylindrical shape of the geometrically strict sense, to the extent that the same effect can be obtained, uneven portions or chamfers It shall shape representing comprising parts and the like.
　On the other hand, "comprising", "including" one component, or, the expression "comprising" does not exclusive representation exclude the presence of other elements.
DESCRIPTION OF SYMBOLS
[0071]
1 rotary machine
2 rotor shaft
10 bearing device
11 carrier ring
12 on the half carrier ring
13 lower half carrier ring
17 and 18 side plates
17a, 18a projecting portions
17b, 18b groove
18 the side plates
20 and 21 guide the metal (semicircular bearing
portions) 25-28 fueling nozzle
30 first bearing pad
32 second bearing pads
40, the first oil guide portion
41 scraper
41a inclined surface
oil discharge mouth 42, 52
42a opening
43, 53 first flow path
44 oil inlet hole
45 oil outlet hole
51 oil recovery box
51a oil inlet portion
51b internal passage portion
51c oil outlet portion
52 oil discharge port portion
52a axial oil drain passage
52b radially oil discharge passage
58 volts
60,70 second oil guide part
63 and 73 second flow path
71 baffle wall
71a inclined surface

The scope of the claims
[Requested item 1]
　A carrier ring,
　a first bearing portion provided along the outer circumference of the rotor shaft at the inner peripheral side of the carrier ring,
　the rotation direction downstream of the rotor shaft than the first bearing portion in the inner peripheral side of the carrier ring a second bearing portion provided along the outer circumference of the rotor shaft on the side,
　on both sides in the axial direction of the carrier ring, and a pair of side plates disposed along the outer periphery of the rotor shaft,
　the first bearing downstream parts, and the second is provided on the upstream side of the bearing portion, changing the oil in the flow direction passing between the outer peripheral surface of the rotor shaft and the inner peripheral surface of the first bearing portion, said a first oil guide portion configured to guide the oil,
　provided in the carrier ring or each said side plate is configured to discharge the oil that has been guided by the first oil guide portion to the outside Yes A mouth,
a bearing apparatus comprising: a.
[Requested item 2]
　The first oil guide portion, the first comprising a scraper provided on the downstream side of the bearing portion,
　in the region of both ends in the out direction of the upstream end face of the scraper, the axial width of the first bearing part the bearing device according to claim 1, characterized in that it is inclined relative to the axial direction so as to shift downstream in the rotation direction of the rotor shaft as axially away from the central portion.
[Requested item 3]
　The first oil guide portion, the first comprises an oil collection box provided on the downstream side of the bearing portion,
　the oil collecting box is
　　provided on an upper surface of the oil collecting box, the inner circumference of the first bearing part an oil inlet opening into the gap between the surface and the outer peripheral surface of the rotor shaft,
　　provided to extend in the axial direction in the interior of the oil collecting box, the internal flow path portion communicating with the oil inlet If,
　　provided on the side or bottom of the oil collection box, an oil outlet for communicating with said with said internal passage portion oil discharge mouth
bearing according to claim 1, characterized in that it comprises apparatus.
[Requested item 4]
　The oil discharge mouth portion, downstream of the first bearing part, and, according to claim 1 to 3, characterized in that it comprises an opening formed in each said side plate of the upstream side of the second bearing portion the bearing device according to any one of.
[Requested item 5]
　The oil discharge mouth portion, downstream of the first bearing, and any of claims 1 to 4, characterized in that it comprises a hole provided in the carrier ring at the upstream side of the second bearing portion the bearing device according to an item or.
[Requested item 6]
　In the region of the carrier ring side of the inner circumferential surface of each said side plate, extending in the circumferential direction along the side surface of the first bearing part in at least a part of the extended range of the first bearing part grooves are formed,
　and guides the oil that has flowed into the groove through the gap between the outer peripheral surface of the rotor shaft and the inner peripheral surface of the first bearing portion, and the downstream end of the first bearing part the bearing according to any one of claims 1 to 5, characterized in that it comprises the oil second oil guide section further that was configured to return between the upstream end portion of the second bearing portion apparatus.
[Requested item 7]
　The first oil guide portion and the second oil guide section of claim 6, characterized in that it is formed by two flow paths crossing each other through different positions in the radial direction of the carrier ring bearing device.
[Requested item 8]
　It said second oil guide section includes a baffle wall provided in the side plate of each as pushed out to the carrier ring side in the groove,
　the rectifying wall is directed downstream in the rotation direction of the rotor shaft the bearing device according to claim 6 or 7 wherein as to approach the carrier ring, and being inclined relative to the direction perpendicular to the axial direction of the rotor shaft as the.
[Requested item 9]
　It said second oil guide section includes an internal flow path provided inside the side plate so as to communicate between the oil inlet bore and oil outlet holes respectively opening to said groove,
　the oil inlet holes, provided so as to be positioned on the side of the first bearing portion,
　said oil outlet hole, the circumferential position between the upstream end of the second bearing portion and the downstream end of the first bearing part the bearing device according to any one of claims 6 to 8, characterized in that provided in the.
[Requested item 10]
　The groove in the circumferential direction range including the extended range of the first bearing and the second bearing portion, according to claim 6 to 9, characterized in that extending along the outer periphery of the rotor shaft any bearing device according to one paragraph.
[Requested item 11]
　The full width in the axial direction of each said side plate and is W, the axial width of the groove W g when a, 0.15 W ≦ W g any of claims 6 to 10, characterized in that meet bearing device according to.
[Requested item 12]
　Provided on the inner peripheral surface of each said side plate, further comprising a fin extending along the outer periphery of the rotor shaft on both sides in the rotational direction of the rotor shaft across the downstream end of the first bearing part ,
　the groove, in any one of claims 6 to 11, characterized in that it is formed by the fin and a recess defined in an inner circumferential surface of the side plate of the carrier ring side than the fin bearing device according.
[Requested item 13]
　The gap between the inner circumferential surface of each said side plate and the outer circumferential surface of the rotor shaft, towards the at least a portion of the peripheral region of the extending range of the first bearing portion, the first bearing portion upstream of the upstream edge, and any of claims 6 to 12, wherein the narrower than at least a portion of the circumferential extent of the downstream side of the downstream end of the second bearing portion the bearing device according to one paragraph.
[Requested item 14]
　Bottom of the groove, the first compared to the outer peripheral surface of the bearing portion, a bearing apparatus according to any one of claims 6 to 13, characterized in that located inside in the radial direction of the carrier ring.
[Requested item 15]
　Provided on the inner peripheral side of the upper half region of the carrier ring, further comprising a semicircular bearing portion configured to press down from above the bounce of the rotor shaft,
　the first bearing and the second bearing portion , respectively, wherein provided on the inner peripheral side of the lower half region of the carrier ring, any one of claims 1 to 14, characterized in that the rotor shaft is a pair of bearing pads configured to support from below the bearing device according to claim.
[Requested item 16]
　A bearing device according to any one of claims 1 to 15,
　rotary machine, characterized in that it comprises a rotary shaft supported by said bearing device.