Claims:We Claim:
1. A sealing arrangement (200) in a bearing oil cooler, for prevention of water ingress in a bearing, comprises:
a pipe (103) connected to a water box (101), wherein the pipe (103) passes through an opening (104) in a top cover plate (105) covering the water box (101);
a first washer (203) welded to the top cover plate (105) at an adjoining point of the pipe (103) and the top cover plate (105);
a second washer (204) located on an upper surface of the first washer (203);
a bush (205) mating with the pipe (103), wherein the pipe (103) is inserted into the first and second washer (203,204);
a flange coupling (206) connected to the pipe (103), wherein a lower end of the flange coupling (206) is enclosed within the bush (205); and
a bellow (207) fixed between the flange coupling (206) and the bush (205);
2. The sealing arrangement (200) in a bearing oil cooler as claimed in claim 1, wherein the pipe (103) includes inlet and outlet pipes.
3. The sealing arrangement (200) in a bearing oil cooler as claimed in claim 1, wherein the bush (207) is composed of stainless steel comprising an internal threaded structure.
4. The sealing arrangement (200) in a bearing oil cooler as claimed in claim 1, wherein the first washer (203) is composed of materials including stainless steel.
5. The sealing arrangement (200) in a bearing oil cooler as claimed in claim 1, wherein the second washer (204) is composed of materials including copper.
6. The sealing arrangement (200) in a bearing oil cooler as claimed in claim 1, wherein the pipe (103) comprises an externally threaded structure.
7. The sealing arrangement (200) in a bearing oil cooler as claimed in claim 1, wherein the bellow (207) is composed of materials including rubber.
8. The sealing arrangement (200) in a bearing oil cooler as claimed in claim 1, wherein the pipe (103) is divided into two parts such that the two parts are joined by using the flange coupling (206).
9. The sealing arrangement (200) in a bearing oil cooler as claimed in claim 1, wherein the flange coupling (206) is composed of materials including stainless steel.
10. The sealing arrangement (200) in a bearing oil cooler as claimed in claim 1, wherein the weld joint between the first washer (203) and the top cover plate (105) is a leak-proof weld joint (208).
, Description:SEALING ARRANGEMENT IN A BEARING OIL COOLER
TECHNICAL FIELD
[0001] The present disclosure, in general, relates to a sealing arrangement in a bearing oil cooler and in particular, relates to a sealing arrangement for a top thrust and guide bearings used in vertical motors. More particularly, it relates to a sealing arrangement to prevent the ingress of water in a bearing through cooling water inlet and outlet water pipes of a bearing oil cooler.

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] The vertical motors for driving the cooling water pump and lift irrigation pumps are provided with a top thrust and guide bearing arrangement and bottom guide bearing arrangement. The bearings are submerged in oil, which is used to dissipate the heat energy generated in the bearings on account of friction. As a result, the oil gets heated and a bearing oil cooler is used to lower the temperature of oil up to the optimum working temperature. This oil cooler is submerged in oil and consists of inlet water tube, tube nest or coil, and outlet water tube. Cooling water is fed through an inlet water tube, further flowing through the tube nest while absorbing the heat of the oil and gets discharged through an outlet water tube.
[0004] In the present state of the art for top thrust and guide bearings, the cooling tubes of the bearing oil cooler are arranged in a coil-type construction. These tubes are connected to two water boxes, located at each end. One water box is connected to a cooling water inlet pipe, while the other water box is connected to an outlet water pipe. These pipes are externally threaded and a suitable elbow is used for connections to water pipelines. The inlet and outlet water pipes pass through the bearing oil tank through holes, which are drilled in the top cover plate. Further, rubber bushes are used as gaskets in the region between the tubes and the top cover plate for the provision of a sealing.
[0005] Over a period of time, the properties of the rubber bush start to degrade and the sealing initially provided by the bush loses its stiffness and the quality reduces due to wear and tear. This creates an avenue for water ingress through the holes in a top cover plate. Moreover, the external threads in the water inlet and outlet pipes can also provide a passage for water ingress inside the bearing oil tank if the sealing is poor and not leak proof.
[0006] In the view of the above-cited problems, there is a need for an advanced sealing arrangement to prevent the ingress of water in the bearing through an inlet and an outlet water pipes of bearing oil cooler used in vertical motors.
[0007] Accordingly, there is a need for a system that can overcome one or more limitations stated above or any other limitation associated with the conventional prior arts.

OBJECTS OF THE DISCLOSURE
[0008] Some of the objects of the present disclosure, which at least one embodiment herein satisfy, are listed hereinbelow.
[0009] It is a general object of the present disclosure to ensure effective and long-term operation of the sealing arrangement.
[0010] It is an object of the present disclosure to provide for an advanced sealing arrangement for the prevention of water ingress in the bearing through an inlet and an outlet water pipes of bearing oil cooler.
[0011] It is another object of the present disclosure to reduce the wear and tear encountered during the operation of the bearing system used in a vertical motor.
[0012] These and other objects and advantages of the present invention will be apparent to those skilled in the art after a consideration of the following detailed description taken in conjunction with the accompanying drawings in which a preferred form of the present invention is illustrated.

SUMMARY
[0013] This summary is provided to introduce concepts related to a sealing arrangement to prevent the ingress of water in a bearing through cooling water inlet and outlet water pipes of a bearing oil cooler. The concepts are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
[0014] In an embodiment, a sealing arrangement in a bearing oil cooler is provided for the prevention of water ingress in a bearing which comprises of a pipe connected to a water box, wherein the pipe passes through an opening in a top cover plate which covers the water box. A first washer is welded to the top cover plate at an adjoining point of the pipe and the top cover plate and a second washer are located on an upper surface of the first washer along with a bush mating with the pipe, wherein the pipe is inserted into the first and second washer. Further, the sealing arrangement comprises of a flange coupling connected to the pipe, wherein a lower end of the flange coupling is enclosed within the bush and bellow is fixed between the flange coupling and the bush.
[0015] In an aspect, a pipe includes an inlet and outlet pipes.
[0016] In an aspect, a bush is composed of stainless steel comprising of an internal threaded structure
[0017] In an aspect, a first washer is composed of materials including stainless steel.
[0018] In an aspect, a second washer is composed of materials including copper
[0019] In an aspect, a pipe comprises of an externally threaded structure.
[0020] In an aspect, a bellow is composed of materials including rubber.
[0021] In an aspect, a pipe is divided into two parts such that the two parts are joined by using the flange coupling.
[0022] In an aspect, a flange coupling is composed of materials including stainless steel.
[0023] In an aspect, a weld joint between the first washer and the top cover plate is a leak-proof weld joint.
[0024] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.
[0025] It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined to form a further embodiment of the disclosure.
[0026] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate exemplary embodiments and, together with the description, serve to explain the disclosed principles. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system and/or methods in accordance with embodiments of the present subject matter are now described, by way of example only, and with reference to the accompanying figures, in which:
[0028] FIG. 1 illustrates a schematic line drawing of the existing sealing arrangements in the bearing oil cooler in accordance with the existing state of the art.
[0029] FIG. 2 illustrates a schematic line drawing of the sealing arrangement with an enlarged view in accordance with an embodiment of the present disclosure;
[0030] FIG. 3 illustrates a schematic line drawing and a sectional view of the sealing arrangement in accordance with an embodiment of the present disclosure.
[0031] It should be appreciated by those skilled in the art that any block diagrams herein represent conceptual views of illustrative systems embodying the principles of the present subject matter. Similarly, it will be appreciated that any flow charts, flow diagrams, state transition diagrams, pseudo code, and the like represent various processes which may be substantially represented in a computer-readable medium and executed by a computer or processor, whether or not such computer or processor is explicitly shown.

DETAILED DESCRIPTION
[0032] The detailed description of various exemplary embodiments of the disclosure is described herein with reference to the accompanying drawings. It should be noted that the embodiments are described herein in such details as to clearly communicate the disclosure. However, the amount of details provided herein is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0033] It is also to be understood that various arrangements may be devised that, although not explicitly described or shown herein, embody the principles of the present disclosure. Moreover, all statements herein reciting principles, aspects, and embodiments of the present disclosure, as well as specific examples, are intended to encompass equivalents thereof.
[0034] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a",” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises,” “comprising,” “includes” and/or “including,” when used herein, specify the presence of stated features, integers, steps, operations, elements and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof.
[0035] It should also be noted that in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed concurrently or may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
[0036] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, e.g., those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
[0037] Embodiments explained herein pertain to the present invention is directed towards providing for a leak-proof sealing arrangement in a bearing oil cooler which prevents the ingress of water through an inlet and an outlet pipe connected to a water box in a thrust and guide bearing arrangement.
[0038] Vertical motors for driving the cooling water pump and lift irrigation pumps are equipped with a top thrust and guide bearing arrangement and bottom guide bearing arrangement. A thrust bearing is a particular type of rotary bearing. Like other rotary bearings, a thrust bearing permits rotation between parts, but they are designed to support a high axial load being parallel to the shaft. Different kinds of thrust ball bearings are used to support different amounts of axial load. While, a plain bearing used to guide a machine element in its lengthwise motion, usually without rotation of the element. In a vertical motor, bearings are submerged in oil, which is used to dissipate the heat energy generated in the bearings due to friction. The oil gets heated as a result, and a bearing oil cooler is used to lower the temperature of the oil to the optimum working temperature. This oil cooler is submerged in oil and consists of inlet water tube, tube nest or coil, and outlet water tube. Cooling water is fed through an inlet water tube, flows through a tube nest absorbing the heat of the oil and gets discharged through an outlet water tube. The inlet and outlet water pipes are taken out from a bearing oil tank through two holes or openings, which are drilled in the top cover plate.
[0039] FIG. 1 illustrates a schematic line drawing of the existing sealing arrangement (100) in the bearing oil cooler in accordance with the existing state of the art wherein, a tube (103) connected to a water box (101), located at the bottom. The water box (101) is connected either to a cooling water inlet pipe (103) or an outlet water pipe (103). The pipe (103) is externally threaded and a suitable elbow is used for connections to the water pipelines. The inlet or the outlet water pipe (103) passes through the bearing oil tank through a hole (104), which is drilled in the top cover plate (105). Further, rubber bushes (102) are used as gaskets in the region between the tube (103) and the top cover plate (105) for the provision of a sealing.
[0040] Disclosed herein is a sealing arrangement (200) in a bearing oil cooler, for prevention of water ingress in a bearing used in vertical motors. As shown in the magnified view illustrated in FIG. 2 and 3, a sealing arrangement (200) in a bearing oil cooler, for the prevention of water ingress in a bearing, comprises of a pipe (103) which is connected to a water box (101), wherein the pipe (103) passes through an opening (104) in a top cover plate (105) covering the water box (101). In an example, wherein the pipe (103) comprises an externally threaded structure.
[0041] Along with a pipe (103), a first washer (203) is welded to the top cover plate (105) at an adjoining point of the pipe (103) and the top cover plate (105). The first washer (203) is composed of materials including stainless steel. A second washer (204) located on an upper surface of the first washer (203). the second washer (204) is composed of materials including copper.
[0042] Further, a bush (205) is located in a way mating with the pipe (103), wherein the pipe (103) is inserted into the first and second washer (203,204). In an example, the bush (207) is composed of stainless steel comprising an internal threaded structure.
[0043] Further, a flange coupling (206) is connected to the pipe (103), wherein the lower end of the flange coupling (206) is enclosed within the bush (205). Flange coupling is a driving coupling between rotating shafts that consists of flanges one of which is fixed at the end of each shaft, the two flanges being bolted together with a ring of bolts to complete the drive. A flange coupling meant to bring two tube ends together in a flush, sealed manner. Such a two-piece coupling unit consists of a keyed receiving side for the flanged end to be fastened to, so it may be married to the opposing tube end, which also has a flanged end. In an example, the flange coupling (206) is composed of materials including stainless steel. A bellow (207) is fixed between the flange coupling (206) and the bush (205). In an example, the bellow (207) is composed of materials including rubber as shown in FIGS. 2 and 3. FIG. 3 illustrates the sectional view of the sealing arrangement in accordance with the present disclosure. The pipe (103) is connected to the water box (101) while passing through the opening (104) located on the top cover plate (105).
[0044] Further, it will be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described or shown herein, embody the principles of the invention and are included within its scope.
[0045] Furthermore, all examples recited herein are principally intended expressly to be only for pedagogical purposes to aid the reader in understanding the principles of the invention and the concepts contributed by the inventor(s) to furthering the art and are to be construed as being without limitation to such specifically recited examples and conditions. Also, the various embodiments described herein are not necessarily mutually exclusive, as some embodiments can be combined with one or more other embodiments to form new embodiments.
[0046] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.
[0047] The specification has described a sealing arrangement to prevent the ingress of water in a bearing through cooling water inlet and outlet water pipes of a bearing oil cooler.
[0048] Finally, the language used in the specification has been principally selected for readability and instructional purposes, and it may not have been selected to delineate or circumscribe the inventive subject matter. It is therefore intended that the scope of the invention be limited not by this detailed description, but rather by any claims that issue on an application based here on. Accordingly, the embodiments of the present invention are intended to be illustrative, but not limiting, of the scope of the invention, which is set forth in the following claims.
Referral numerals
Reference Number Description
100 Existing Sealing Arrangement for bearing oil cooler
101 Water box
102 Rubber bush
103 Pipe
104 Opening/Hole
105 Top cover plate
200 Leak-proof sealing arrangement
203 First washer
204 Second washer
205 Bush
206 Flange coupling
207 Bellow
208 Leak-proof weld joint