Title of the invention: Remaining life estimation system, solid fuel crusher, remaining life estimation method, and remaining life estimation program. Technical field [0001] The present disclosure relates to a remaining life estimation system and a solid fuel crusher, a remaining life estimation method, and a remaining life estimation program. Background technology [0002] Conventionally, solid fuel (carbon-containing solid fuel) such as coal and biomass fuel is crushed into fine powder within a predetermined particle size range by a crusher (mill) and supplied to a combustion device. The mill crushes solid fuel such as coal and biomass fuel charged into the rotary table by chewing between the rotary table and the rollers. Then, the fuel that has been crushed into fine powder by the transport gas supplied from the outer periphery of the rotary table is sorted by a classifier with a predetermined particle size range, transported to a boiler, and burned by a combustion device. .. In a thermal power plant, steam is generated by heat exchange with the combustion gas generated by burning in a boiler, the steam turbine is rotationally driven by the steam, and the generator connected to the steam turbine is rotationally driven to generate electricity. Is done. [0003] When crushing solid fuel, a load is applied to the rollers, so a load is also applied to the journal bearings of the rollers, and the durable life is shortened. Therefore, it is necessary to grasp the remaining life of the journal bearing of the roller and perform maintenance at an appropriate time. [0004] Patent Document 1 discloses that the hydraulic load is measured, the roller load fluctuation is calculated, and the replacement time is predicted based on the fatigue damage degree calculated by the roller load fluctuation. Prior art literature Patent documents [0005] Patent Document 1: Japanese Unexamined Patent Publication No. 2000-246126 Outline of the invention Problems to be solved by the invention [0006] However, in the conventional remaining life estimation method, the remaining life is estimated by using a design value according to the maximum load (for example, the maximum coal supply amount) applied to the journal bearing of the roller as a fixed value. Therefore, although the operating load fluctuation of the mill occurs in response to the load fluctuation in the power plant, the fluctuation of the journal bearing load is not reflected in the estimated remaining life. In addition to the replacement time predicted from the remaining life estimated using the design value according to the maximum load, in many cases, the replacement time with a margin period is actually selected, so the maintenance frequency that is originally required is required. There is a risk that the maintenance frequency will increase compared to. [0007] Although Patent Document 1 discloses that the hydraulic load is measured, it is not possible to accurately grasp the distribution of the load in the radial direction and the axial direction with respect to the journal bearing only by measuring the hydraulic load, and the remaining life is estimated at the time of estimation. It may not be possible to effectively reflect fluctuations in the load value. [0008] The present disclosure has been made in view of such circumstances, and is a remaining life estimation system and a solid fuel crusher capable of estimating the remaining life of the journal bearing of the roller more accurately, and a remaining life estimation method. , As well as an enduring life estimation program. Means to solve problems [0009] The first aspect of the present disclosure is a system for estimating the remaining life of a journal bearing of a roller that grinds solid fuel to and from a table, in which a measured value of information regarding a load applied to the roller and an inclination of the roller with respect to the table are provided. It is a remaining life estimation system including an acquisition unit for acquiring a measured value of information about an angle and an estimation unit for estimating the remaining life of the journal bearing based on the information acquired by the acquisition unit. [0010] A second aspect of the present disclosure is a method for estimating the remaining life of a journal bearing of a roller that crushes solid fuel with and from a table, in which a measured value of information regarding a load applied to the roller and an inclination of the roller with respect to the table. It is a remaining life estimation method including an acquisition step of acquiring a measured value of information about an angle and an estimation step of estimating the remaining life of the journal bearing based on the information acquired in the acquisition step. [0011] A third aspect of the present disclosure is a program for estimating the remaining life of a journal bearing of a roller that grinds solid fuel to and from a table, in which a measured value of information regarding a load applied to the roller and a distance of the roller to the table. The remaining life for causing the computer to execute the acquisition process for acquiring the measured value of the information regarding the lift amount, and the estimation process for estimating the remaining life of the journal bearing based on the information acquired in the acquisition process. It is an estimation program. The invention's effect [0012] According to the present disclosure, there is an effect that the remaining life of the journal bearing of the roller can be estimated more accurately. A brief description of the drawing [0013] FIG. 1 is a configuration diagram showing a solid fuel crusher and a boiler according to the first embodiment of the present disclosure. FIG. 2 is a partially enlarged vertical sectional view showing a circumference of a roller according to the first embodiment of the present disclosure. FIG. 3 is a hardware configuration diagram of a control unit according to the first embodiment of the present disclosure. FIG. 4 is a functional block diagram showing functions provided by the control unit according to the first embodiment of the present disclosure. FIG. 5 is a partially enlarged vertical sectional view showing a load state of a roller according to the first embodiment of the present disclosure. FIG. 6 is a partially enlarged vertical sectional view showing a roller inclination angle according to the first embodiment of the present disclosure. FIG. 7 is a partially enlarged vertical sectional view showing a roller inclination angle according to the first embodiment of the present disclosure. FIG. 8 is a diagram showing a configuration example of a gap sensor according to the first embodiment of the present disclosure. FIG. 9 is a diagram showing a flowchart of a remaining life estimation process according to the first embodiment of the present disclosure. FIG. 10 is a diagram showing an estimation result of remaining life according to the first embodiment of the present disclosure. FIG. 11 is a functional block diagram showing functions provided by the control unit according to the second embodiment of the present disclosure. FIG. 12 is a diagram showing a prediction result of remaining life according to the second embodiment of the present disclosure. FIG. 13 is a functional block diagram showing functions provided by the control unit according to the third embodiment of the present disclosure. FIG. 14 is a diagram showing an example of a system related to a maintenance plan according to a third embodiment of the present disclosure. Embodiment for carrying out the invention [0014] [First Embodiment] Hereinafter, the remaining life estimation system and the solid fuel crusher according to the present disclosure, the remaining life estimation method, and the first embodiment of the remaining life estimation program will be described with reference to the drawings. In this embodiment, a case where the remaining life system is applied to the solid fuel crusher 100 of the power plant 1 will be described. [0015] As shown in FIG. 1, the power plant 1 according to the present embodiment includes a solid fuel crushing device 100 and a boiler 200. [0016] The solid fuel crusher 100 of the present embodiment crushes a solid fuel (carbon-containing solid fuel) such as coal or biomass fuel as an example, generates fine pulverized fuel, and supplies it to the burner portion (combustion device) 220 of the boiler 200. It is a device. The power plant 1 including the solid fuel crusher 100 and the boiler 200 shown in FIG. 1 includes one solid fuel crusher 100, but corresponds to each of the plurality of burner portions 220 of one boiler 200. It may be a system including a plurality of solid fuel crushing devices 100. [0017] As shown in FIG. 1, the solid fuel crusher 100 of the present embodiment includes a mill (crushing unit) 10, a coal feeder (fuel supply machine) 20, and a blower unit (transport gas supply unit) 30. It includes a detection unit (state detection device) 40 and a control unit (control device) 60. In this embodiment, "upper" means the direction of the vertically upper side, and "upper" such as the upper part and the upper surface means the part on the vertical upper side. Similarly, "bottom" indicates the part on the vertically lower side. [0018] The mill 10 for crushing solid fuel such as coal or biomass fuel supplied to the boiler 200 into pulverized solid fuel may be in the form of crushing only coal or crushing only biomass fuel. It may be in the form or in the form of crushing the biomass fuel together with the coal, and the type of the solid fuel is not limited. Here, the biomass fuel is a renewable organic resource derived from living organisms, and is, for example, thinned wood, waste wood, drifting wood, grass, waste, sludge, tires, and recycled fuel (pellets and pellets) made from these. Chips), etc., and are not limited to those presented here. Since biomass fuel takes in carbon dioxide during the growth process of biomass, it is considered to be carbon-neutral, which does not emit carbon dioxide, which is a greenhouse gas, and its use is being studied in various ways. [0019] The mill 10 rotationally drives the housing 11, the rotary table (table) 12, the rollers (crushing rollers) 13, the drive unit 14, the rotary classifier 16, the fuel supply unit 17, and the rotary classifier 16. It is provided with a motor 18 for making the motor 18 and the motor 18. The housing 11 is formed in a cylindrical shape extending in the vertical direction, and is a housing that houses the rotary table 12, the rollers 13, the rotary classifier 16, and the fuel supply unit 17. A fuel supply unit 17 is attached to the central portion of the ceiling portion 42 of the housing 11. The fuel supply unit 17 supplies the solid fuel guided from the bunker 21 into the housing 11, is arranged along the vertical direction at the center position of the housing 11, and the lower end portion extends to the inside of the housing 11. ing. [0020] A drive unit 14 is installed near the bottom surface portion 41 of the housing 11, and a rotary table 12 that rotates by the driving force transmitted from the drive unit 14 is rotatably arranged. The rotary table 12 is a member having a circular shape in a plan view, and is arranged so that the lower ends of the fuel supply unit 17 face each other. The upper surface of the rotary table 12 may have a shape in which the central portion is low and the upper surface thereof is inclined toward the outside, and the outer peripheral portion may be bent upward. The fuel supply unit 17 supplies solid fuel (for example, coal or biomass fuel in this embodiment) from above to the lower rotary table 12, and the rotary table 12 crushes the supplied solid fuel between the rollers 13 and the rotary table 12. It is also called a crushing table. [0021] When the solid fuel is charged from the fuel supply unit 17 toward the center of the rotary table 12, the solid fuel is guided to the outer peripheral side of the rotary table 12 by the centrifugal force due to the rotation of the rotary table 12 and is between the solid fuel and the roller 13. It is sandwiched and crushed. The crushed solid fuel is blown upward by the transport gas (hereinafter referred to as primary air) guided from the transport gas flow path (hereinafter referred to as primary air flow path) 100a and rotates. It is guided to the formula classifier 16. That is, an outlet (not shown) is provided on the outer periphery of the rotary table 12 to allow the primary air flowing from the primary air flow path 100a to flow out to the space above the rotary table 12 in the housing 11. A vane (not shown) is installed at the air outlet to give a swirling force to the primary air blown out from the air outlet. The primary air to which the swirling force is applied by the vane becomes an air flow having a swirling velocity component, and guides the solid fuel crushed on the rotary table 12 to the upper rotary classifier 16 in the housing 11. Of the crushed solid fuel mixed in the primary air, those having a particle size larger than the predetermined particle size are classified by the rotary classifier 16 or fall to the rotary table 12 without reaching the rotary classifier 16. It is returned and crushed again. [0022] The roller 13 is a rotating body that crushes the solid fuel supplied from the fuel supply unit 17 to the rotary table 12. The roller 13 is pressed against the upper surface of the rotary table 12 and cooperates with the rotary table 12 to crush the solid fuel. In FIG. 1, only one roller 13 is represented as a representative, but a plurality of rollers 13 are arranged facing each other at regular intervals in the circumferential direction so as to press the upper surface of the rotary table 12. To. For example, the three rollers 13 are arranged at equal intervals in the circumferential direction with an angular interval of 120 ° on the outer peripheral portion. In this case, the portion where the three rollers 13 are in contact with the upper surface of the rotary table 12 (the portion to be pressed) is equidistant from the rotation center axis of the rotary table 12. [0023] The roller 13 can be swung up and down by the journal head 45, and is supported so as to be able to approach and separate from the upper surface of the rotary table 12. The outer peripheral surface of the roller 13 is When the rotary table 12 rotates while in contact with the upper surface of the rotary table 12, it receives rotational force from the rotary table 12 and rotates with the rotary table 12. When the solid fuel is supplied from the fuel supply unit 17, the solid fuel is pressed between the roller 13 and the rotary table 12 and crushed to become fine fuel. [0024] The support arm 47 of the journal head 45 is supported on the side surface of the housing 11 by a support shaft 48 whose intermediate portion is along the horizontal direction so that the roller 13 can swing in the vertical direction around the support shaft 48. A pressing device 49 is provided at the upper end portion on the vertically upper side of the support arm 47. The pressing device 49 is fixed to the housing 11 and applies a load to the roller 13 via the support arm 47 or the like so as to press the roller 13 against the rotary table 12. [0025] An example of the detailed configuration of the roller 13 is shown in FIG. 2 (partially enlarged vertical sectional view showing the circumference of the roller 13). The roller 13 is supported by the housing 11 by the roller support portion 55. The roller support portion 55 extends upward on the support shaft 52 to which the roller 13 is attached, the main body 56 for holding the support shaft 52, the support shaft 48 fixedly attached to the side portion of the main body 56, and the upper surface of the main body 56. It includes a support arm 47 attached so as to exist, and a protrusion 57 provided on the lower surface of the main body 56 so as to project downward. [0026] A hollow hub 51 having a substantially cylindrical shape is attached to the center of the roller 13. The roller 13 is attached to the tip end portion of the support shaft 52 via the hub 51. That is, the roller 13 is attached to the support shaft 52 via the journal bearing (roller journal bearing) 59, so that the roller 13 can rotate around the support shaft 52 in the circumferential direction. As will be described later, in this embodiment, the remaining life of the journal bearing 59 is estimated. The support shaft 48 is arranged so that the axis is substantially horizontal and extends in the tangential direction of the circular shape of the rotary table 12. The roller support portion 55 is rotatable about the support shaft 48, and by rotating around the support shaft 48, the distance (lift amount X) of the roller 13 to the rotary table 12 changes. [0027] A pressing device 49 for pressing the upper end of the support arm 47 is attached to the housing 11. The pressing device 49 includes an intermediate piston 53 attached to the housing 11 so as to be movable in the longitudinal direction, and a hydraulic load portion 54 attached to the outer periphery of the housing 11 to press the outer end portion of the intermediate piston 53. The inner end of the intermediate piston 53 is in contact with the outer peripheral side of the upper end of the support arm 47. The pressing device 49 generates a hydraulic load L1 (see FIG. 5) by the hydraulic load portion 54, and moves the intermediate piston 53 in the longitudinal direction to swing the roller support portion 55 around the support shaft 48. That is, the roller 13 is pressed against the rotary table 12 by the pressing device 49. [0028] The protrusion 57 abuts on the stopper 58 when the roller support 55 swings around the support shaft 48 to a certain position. The stopper 58 functions as a limiting member that limits the amount of movement of the roller 13 in the direction of pressing the rotary table 12. [0029] The drive unit 14 is a device that transmits a driving force to the rotary table 12 and rotates the rotary table 12 around a central axis (rotary axis). The drive unit 14 generates a driving force for rotating the rotary table 12. [0030] The rotary classifier 16 is provided on the upper part of the housing 11 and has a hollow substantially inverted conical outer shape. The rotary classifier 16 includes a plurality of blades 16a extending in the vertical direction at its outer peripheral position. Each blade 16a is provided around the central axis of the rotary classifier 16 at a predetermined interval (equal interval). In the rotary classifier 16, the solid fuel crushed by the roller 13 is larger than a predetermined particle size (for example, 70 to 100 μm for coal) (hereinafter, the crushed solid fuel exceeding the predetermined particle size is referred to as “crude fuel”. It is a device that classifies fuels having a predetermined particle size or less (hereinafter, crushed solid fuel having a predetermined particle size or less is referred to as "fine powder fuel"). The rotary classifier 16 that classifies by rotation is also called a rotary separator, and is given a rotational driving force by a motor 18 controlled by a control unit 60, and has a cylindrical shaft (not shown) extending in the vertical direction of the housing 11. It rotates around the fuel supply unit 17 in the center. [0031] In the crushed solid fuel that has reached the rotary classifier 16, due to the relative balance between the centrifugal force generated by the rotation of the blade 16a and the centripetal force due to the airflow of the primary air, the coarse powder fuel having a large diameter is produced by the blade 16a. It is knocked down, returned to the rotary table 12, crushed again, and the fine fuel is guided to the outlet 19 at the ceiling 42 of the housing 11. The fine powder fuel classified by the rotary classifier 16 is discharged from the outlet 19 to the supply flow path 100b, and is conveyed to the subsequent process together with the primary air. The pulverized fuel that has flowed out to the supply flow path 100b is supplied to the burner portion 220 of the boiler 200. [0032] The fuel supply unit 17 is attached so that the lower end portion extends vertically to the inside of the housing 11 so as to penetrate the upper end of the housing 11, and the solid fuel input from the upper part of the fuel supply unit 17 is loaded into the rotary table 12. Supply to the approximately central area of. The fuel supply unit 17 is supplied with solid fuel from the coal feeder 20. [0033] The coal feeder 20 includes a transport unit 22 and a motor 23. The transport unit 22 transports the solid fuel discharged from the lower end portion of the down spout portion 24 directly under the bunker 21 by the driving force given from the motor 23, and is guided to the fuel supply unit 17 of the mill 10. Normally, primary air for transporting pulverized solid fuel, which is crushed solid fuel, is supplied to the inside of the mill 10, and the pressure is high. Fuel is held in a laminated state inside the down spout portion 24, which is a pipe extending in the vertical direction directly under the bunker 21, and the solid fuel layer laminated in the down spout portion 24 is on the mill 10 side. The sealing property is ensured so that the primary air and the fine fuel do not flow back. The amount of solid fuel supplied to the mill 10 may be adjusted by the belt speed of the belt conveyor of the transport unit 22. [0034] On the other hand, the particles and pellets of the biomass fuel before crushing have a constant particle size (the size of the pellets) as compared with the coal fuel (that is, the particle size of the coal before crushing is, for example, about 2 to 50 mm). Is, for example, about 6 to 8 mm in diameter and about 40 mm or less in length), and is lightweight. Therefore, when the biomass fuel is stored in the downspout portion 24, the gap formed between the biomass fuels becomes larger than that in the case of the coal fuel. Therefore, since there is a gap between the biomass fuel chips and pellets in the down spout portion 24, the primary air blown up from the inside of the mill 10 and the fine powder fuel pass through the gap formed between the biomass fuels and the mill. 10 The internal pressure may drop. When the primary air blows through the reservoir of the bunker 21, the transportability of the biomass fuel deteriorates and dust is generated, the bunker 21 and the downspout section 24 are ignited, and when the pressure inside the mill 10 decreases, the pulverized fuel is transported. Various problems may occur in the operation of the mill 10, such as a decrease in the amount. Therefore, a rotary valve (not shown) may be provided in the middle of the fuel supply unit 17 from the coal feeder 20 to suppress the backflow due to the blow-up of the primary air and the pulverized fuel. [0035] The blower unit 30 is a device that dries the solid fuel crushed by the rollers 13 and blows the primary air for supplying the rotary classifier 16 to the inside of the housing 11. In this embodiment, the blower unit 30 has a primary air ventilator (PAF: Primary Air Fan) 31, a hot gas flow path 30a, and a cold, in order to adjust the primary air blown to the housing 11 to an appropriate temperature. It includes a gas flow path 30b, a hot gas damper 30c, and a cold gas damper 30d. [0036] In the present embodiment, the heat gas flow path 30a heats a part of the air (outside air) sent from the primary air ventilator 31 through a heat exchanger (heater) 34 such as an air preheater. It is supplied as heat gas. A hot gas damper 30c (first blower portion) is provided on the downstream side of the hot gas flow path 30a. The opening degree of the heat gas damper 30c is controlled by the control unit 60. The flow rate of the hot gas supplied from the hot gas flow path 30a is determined by the opening degree of the hot gas damper 30c. [0037] The cold gas flow path 30b supplies a part of the air sent from the primary air ventilator 31 as cold gas at room temperature. A cold gas damper (second air blower) 30d is provided on the downstream side of the cold gas flow path 30b. The opening degree of the cold gas damper 30d is controlled by the control unit 60. The flow rate of the cold gas supplied from the cold gas flow path 30b is determined by the opening degree of the cold gas damper 30d. [0038] In the present embodiment, the flow rate of the primary air is the total flow rate of the hot gas flow rate supplied from the hot gas flow path 30a and the cold gas flow rate supplied from the cold gas flow path 30b, and the temperature of the primary air is the hot gas. It is determined by the mixing ratio of the hot gas supplied from the flow path 30a and the cold gas supplied from the cold gas flow path 30b, and is controlled by the control unit 60. A part of the combustion gas discharged from the boiler 200 is guided to the hot gas supplied from the hot gas flow path 30a via a gas recirculation ventilator (not shown) to form an air-fuel mixture, which flows in from the primary air flow path 100a. The oxygen concentration of the primary air may be adjusted. [0039] In the present embodiment, the state detection unit 40 of the housing 11 transmits the measured or detected data to the control unit 60. The state detection unit 40 of the present embodiment is, for example, a differential pressure measuring means, and is a portion where the primary air flows from the primary air flow path 100a into the inside of the mill 10 and the primary air and fine powder fuel from the inside of the mill 10 to the supply flow path 100b. The differential pressure with the outlet 19 discharged from the mill 10 is measured as the differential pressure in the mill 10. For example, due to the classification performance of the rotary classifier 16, the increase / decrease in the circulation amount of the crushed solid fuel circulating between the vicinity of the rotary classifier 16 and the vicinity of the rotary table 12 inside the mill 10 and the difference in the mill 10 with respect to this. The increase and decrease of pressure changes. That is, the fine fuel to be discharged from the outlet 19 can be adjusted and managed with respect to the solid fuel supplied to the inside of the mill 10. Therefore, a large amount of pulverized fuel can be supplied to the burner portion 220 provided in the boiler 200 within a range in which the particle size of the pulverized fuel does not affect the combustibility of the burner portion 220. The state detection unit 40 of the present embodiment is, for example, a temperature measuring means, and the temperature of the primary air supplied to the inside of the housing 11 for blowing the solid fuel crushed by the rollers 13 to the rotary classifier 16 and the housing. The temperature of the primary air up to the outlet 19 is detected inside the eleven, and the blower unit 30 is controlled so as not to exceed the upper limit temperature. Since the primary air is cooled by transporting the pulverized material while drying it in the housing 11, the temperature at the outlet 19 from the upper space of the housing 11 is, for example, about 60 to 80 degrees. [0040] The boiler 200 burns using the fine fuel supplied from the solid fuel crusher 100 to generate steam. Therefore, the boiler 200 includes a furnace 210 and a burner section 220. [0041] The burner unit 220 heats the primary air containing fine fuel supplied from the supply flow path 100b and the air (outside air) sent out from the indentation air ventilator (FDF: Feed Draft Fan) 32 by the heat exchanger 34. It is a device that forms a flame by burning fine fuel using the supplied secondary air. Combustion of the fine fuel is performed in the furnace 210, and the high-temperature combustion gas is discharged to the outside of the boiler 200 after passing through a heat exchanger (not shown) such as an evaporator, a superheater, and an economizer. [0042] The combustion gas discharged from the boiler 200 is subjected to a predetermined treatment by an environmental device (not shown in a denitration device, an electrostatic dust collector, etc.), and is sent out from the primary air ventilator 31 by a heat exchanger 34 such as an air preheater, for example. The heat is exchanged between the air and the air sent from the indented air ventilator 32, and the induced ventilation is performed.It is guided to a chimney (not shown) via a machine (IDF: Induced Draft Fan) 33 and discharged to the outside air. The air sent from the primary air ventilator 31 heated by the combustion gas in the heat exchanger 34 is supplied to the above-mentioned hot gas flow path 30a. The water supply to each heat exchanger of the boiler 200 is heated by an economizer (not shown) and then further heated by an evaporator (not shown) and a superheater (not shown) to generate high-temperature and high-pressure steam to generate electricity. It is sent to a steam turbine (not shown), which is a unit, to rotate drive the steam turbine, and a generator connected to the steam turbine (not shown) is driven to rotate to generate electricity, thereby constituting a power generation plant 1. [0043] The control unit 60 is a device that controls each part of the solid fuel crushing device 100. The control unit 60 may control the rotation speed of the rotary table 12 with respect to the operation of the mill 10 by transmitting a drive instruction to the drive unit 14, for example. The control unit 60 adjusts the classification performance by, for example, transmitting a drive instruction to the motor 18 of the rotary classifier 16 to control the rotation speed, thereby optimizing the differential pressure in the mill 10 within a predetermined range. It is possible to stabilize the supply of pulverized fuel. The control unit 60 can adjust the supply amount of the solid fuel that the transport unit 22 conveys the solid fuel and supplies it to the fuel supply unit 17, for example, by transmitting a drive instruction to the motor 23 of the coal feeder 20. .. The control unit 60 can control the opening degree of the hot gas damper 30c and the cold gas damper 30d to control the flow rate and temperature of the primary air by transmitting the opening degree instruction to the blowing unit 30. The control unit 60 controls the hydraulic pressure applied to the hydraulic load unit 54 of the pressing device 49 according to, for example, the supply amount of solid fuel and the rotation speed of the rotary classifier 16, so that the roller 13 can be moved to the rotary table 12. It optimizes the pressing force and enables stable crushing of solid fuel. [0044] The control unit 60 estimates the remaining life of the journal bearing 59. That is, the control unit 60 has a function as a remaining life estimation system of the journal bearing 59 of the roller 13 that crushes the solid fuel between the rotary table 12 and the rotary table 12. The function as the remaining life estimation system may be provided in a control device different from the control unit 60. [0045] FIG. 3 is a diagram showing an example of the hardware configuration of the control unit 60 according to the present embodiment. As shown in FIG. 3, the control unit 60 is a computer system (computer system), for example, a CPU 110, a ROM (Read Only Memory) 120 for storing a program executed by the CPU 110, and each program at the time of execution. It is provided with a RAM (Random Access Memory) 130 that functions as a work area, a hard disk drive (HDD) 140 as a large-capacity storage device, and a communication unit 150 for connecting to a network or the like. Each of these parts is connected via a bus 180. [0046] The control unit 60 may include an input unit including a keyboard, a mouse, and the like, a display unit including a liquid crystal display device for displaying data, and the like. [0047] The storage medium for storing the program or the like executed by the CPU 110 is not limited to the ROM 120. For example, it may be another auxiliary storage device such as a magnetic disk, a magneto-optical disk, or a semiconductor memory. [0048] A series of processing processes for realizing various functions described later is recorded in the HDD 140 or the like in the form of a program, and the CPU 110 reads this program into the RAM 130 or the like and executes information processing / arithmetic processing. , Various functions described later are realized. The program may be installed in a ROM 120 or other storage medium in advance, provided in a state of being stored in a computer-readable storage medium, or distributed via a wired or wireless communication means. May be applied. The computer-readable storage medium is a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. The HDD 140 may be replaced with a solid state disk (SSD) or the like. [0049] FIG. 4 is a functional block diagram showing the functions related to the estimation of the remaining life of the control unit 60. As shown in FIG. 4, the control unit 60 includes an acquisition unit 62 and an estimation unit 63. [0050] The acquisition unit 62 acquires the measured value of the information regarding the load applied to the roller 13 and the measured value of the information regarding the inclination angle of the roller 13 with respect to the rotary table 12. In the acquisition unit 62, the measured value of the information on the load applied to the roller 13, which is important for reflecting the actual operating state in the estimation of the remaining life of the journal bearing 59, and the information on the inclination angle of the roller 13 with respect to the rotary table 12 are obtained. Have acquired. [0051] As shown in FIG. 5, the information regarding the load applied to the roller 13 is the information regarding the load L2 received from the rotary table 12 in the roller 13. The load L2 from the rotary table 12 is a force (load) received from the rotary table 12 when the roller 13 is pressed against the solid fuel supplied to the upper surface of the rotary table 12 and crushed. That is, it is the force that the roller 13 receives in the direction perpendicular to the adjacent facing surfaces when the contact surface between the rotary table 12 and the roller 13 or the gap between the roller 13 and the rotary table 12 is set to the minimum. The load L2 from the rotary table 12 acts along the axis AX1 parallel to the rotary axis of the rotary table 12 (for example, in the direction of the rotary axis). The shape of the rotary table 12 in FIG. 5 is an example and is not limited to the shape. [0052] In the present embodiment, as information regarding the load applied to the roller 13, the additional load in the pressing device 49 (pressing pressure pressed toward the rotary table 12 via the solid fuel that crushes the roller 13), that is, the hydraulic load in the hydraulic load unit 54. The case of acquiring L1 will be described. The hydraulic load (additional load) L1 is a parameter controlled when the roller 13 is pressed against the rotary table 12, and the measured value is measured by the installed sensor and output to the acquisition unit 62. As the sensor, a pressure sensor such as a load cell or a pressure sensor can be used. The information regarding the load applied to the roller 13 is not limited to the hydraulic load (additional load) L1 as long as it is a parameter related to the load applied to the roller 13. For example, the load applied to the roller 13 or the load applied to the journal bearing 59 may be directly measured and acquired by the sensor. [0053] The information regarding the tilt angle of the roller 13 with respect to the rotary table 12 is information regarding the roller tilt angle θ as shown in FIG. 6 (partially enlarged vertical sectional view showing the roller tilt angle). The roller tilt angle θ is the tilt of the roller 13 with respect to the rotary table 12, and the axis in the rotation axis direction of the rotary table 12 (or the axis parallel to the rotation axis) AX1 and the axis perpendicular to the rotation axis AX2 of the roller 13 (or the axis perpendicular to the rotation axis AX2 of the roller 13). Vertical surface) The angle formed by AX3. [0054] In this embodiment, the lift amount X of the roller 13 is used as the information regarding the inclination angle of the roller 13 with respect to the rotary table 12. The lift amount X of the roller 13 is the distance between the rotary table 12 and the roller 13. The lift amount X is a distance generated by the presence of solid fuel to be crushed between the rotary table 12 and the roller 13. Since the roller 13 rotates about the support shaft 48, the lift amount X is the distance between the rotary table 12 and the roller 13 when the roller 13 moves up and down with respect to the support shaft 48. In this embodiment, the lift amount X is acquired by, for example, a gap sensor as shown in FIG. The lift amount X may be a linear movement sensor, a capacitance distance sensor, a laser distance sensor, or the like. In FIG. 7, a measurement bar 71 and a gap sensor 72 are provided for the support shaft 48. The measurement bar 71 rotates with the rotation of the support shaft 48 (rotation of the roller 13). The installation position of the gap sensor 72 is fixed, and the distance between the gap sensor 72 and the measurement bar 71 is measured. In FIGS. 7 and 8, the ratio of the distance L between the central axis (AX3) of the roller 13 and the support shaft 48 and the lift amount X, and the ratio between the length l of the measurement bar 71 in the gap sensor 72 and the gap value x. Are equal. Therefore, the lift amount X can be calculated from the gap sensor 72 by the following equation (1). [0055] [Number 1] [0056] In equation (1), L and l are design values, and x can be acquired from the gap sensor, so that the lift amount X can be calculated. The lift amount X may be measured from the operating amount of the pressing device 49, for example, the moving amount of the intermediate piston 53, or if the lift amount X can be directly measured, the lift amount X may be measured. good. [0057] The acquisition unit 62 may acquire the lift amount X, or may acquire the gap value x, which is the output of the gap sensor. When the amount of movement of the roller 13 is limited by the protrusion 57 and the stopper 58 and a gap is provided between the roller 13 and the rotary table 12, the 0 (zero) point of the gap value x is set as the roller 13. It may be set as the point where the gap of the rotary table 12 is minimized, and similarly, the 0 (zero) point of the gap value x of the gap sensor 72 is set as the point where the distance between the gap sensor 72 and the measurement bar 71 is minimized. You may put it. [0058] In the present embodiment, the lift amount X of the roller 13 is used as the information regarding the tilt angle of the roller 13 with respect to the rotary table 12, but the information regarding the roller tilt angle θ is not limited to the lift amount X of the roller 13. It is possible. The roller inclination angle θ may be directly measured and acquired by a sensor or the like. As will be described later, in the present embodiment, the roller inclination angle θ is calculated from the lift amount X of the roller 13, and the thrust load Ls and the radial load Lr are calculated and used for estimating the remaining life. When the lift amount X is acquired, the thrust load Ls and the radial load Lr may be calculated and the remaining life may be estimated without the calculation of the roller inclination angle θ. In this case, the acquisition unit 62 acquires the measured value of the information regarding the load applied to the roller 13 and the measured value of the information regarding the lift amount X of the roller 13 with respect to the rotary table 12. The information regarding the lift amount X of the roller 13 with respect to the rotary table 12 can be used without being limited to the lift amount X as long as the information is related to the lift amount X. [0059] The estimation unit 63 estimates the remaining life of the journal bearing 59 based on the information acquired by the acquisition unit 62. Specifically, the estimation unit 63 calculates the radial load Lr and the thrust load Ls loaded on the journal bearing 59, and estimates the remaining life of the journal bearing 59 based on the radial load Lr and the thrust load Ls. [0060] FIG. 5 is a diagram (partially enlarged vertical sectional view) showing the relationship of each load around the roller 13. As shown in FIG. 5, since the roller 13 is pressed against the rotary table 12 by the hydraulic load L1, the load L2 from the rotary table 12 is applied to the roller 13. There may be solid fuel to be crushed between the roller 13 and the rotary table 12. The load L2 from the rotary table 12 is also applied to the journal bearing 59 via the roller 13. By decomposing the load L2 received by the journal bearing 59 into a radial component and a thrust component, the radial load Lr and the thrust load Ls in the journal bearing 59 can be calculated. The estimation unit 63 estimates the remaining life of the journal bearing 59 from the radial load Lr and the thrust load Ls. As a method for estimating the life of the journal bearing 59 using the radial load Lr and the thrust load Ls, a known method can be used. [0061] Specifically, the hydraulic load L1 and the lift amount X acquired by the acquisition unit 62 are input to the estimation unit 63. A gap value x may be input to the estimation unit 63, and the lift amount X may be calculated by the above calculation. In the estimation unit 63, from the rotary table 12 based on the input hydraulic load L1.The load L2 received by the journal bearing 59 is calculated. Since the roller 13 is pressed toward the rotary table 12 based on the hydraulic load L1 via the solid fuel to be crushed, the hydraulic load L1 and the load L2 from the rotary table 12 have a correlation. There is. Therefore, the estimation unit 63 can calculate the load L2 from the rotary table 12 from the hydraulic load L1. When the load L2 from the rotary table 12 can be directly acquired by the acquisition unit 62 by measuring instruments using various sensors, the acquired load L2 from the rotary table 12 may be used. When calculating the load L2 from the hydraulic load L1, in addition to the hydraulic load L1, the load due to the own weight of the roller 13 and the member supporting the roller 13 may be added. [0062] Then, the estimation unit 63 calculates the roller inclination angle θ based on the input lift amount X. The roller inclination angle θ is calculated by the following equation (2). [0063] [Number 2] [0064] As shown in FIG. 6, in the equation (2), θ 0 is the roller inclination reference angle, and when the lift amount X is 0 (zero) (that is, the roller 13 and the rotary table 12 are in contact with each other, or the roller 13 and the roller 13 are in contact with each other. It is a roller inclination angle θ (a state when the gap of the rotary table 12 is minimized). Then, Δθ is the amount of change in the roller inclination angle θ with respect to the roller inclination reference angle, and Δθ is the value of the inverse tangent function of the ratio of the lift amount X and the distance L. That is, when the lift amount X is small, the roller tilt angle θ becomes large, and when the lift amount X is large, the roller tilt angle θ becomes small. [0065] In this way, when the load L2 and the roller inclination angle θ from the rotary table 12 are calculated in the estimation unit 63, the thrust load Ls and the radial load Lr are calculated as shown in the relationship of FIG. The thrust load Ls is calculated by multiplying the load from the rotary table 12 by sin (θ), and the radial load Lr is calculated by multiplying the load from the rotary table 12 by cos (θ). [0066] In this way, the estimation unit 63 calculates the thrust load Ls and the radial load Lr applied to the journal bearing 59, and estimates the remaining life based on the thrust load Ls and the radial load Lr. As for the method of estimating the remaining life, various methods can be applied as long as they are based on the thrust load Ls and the radial load Lr. [0067] Next, an example of the remaining life estimation process by the control unit 60 described above will be described with reference to FIG. FIG. 9 is a flowchart showing an example of the procedure of the remaining life estimation process according to the present embodiment. The flow shown in FIG. 9 is executed when, for example, an operator or the like gives an instruction to start estimating the remaining life. The remaining life estimation process may be executed periodically even if there is no start instruction from the operator or the like. [0068] First, the measured values ​​of the hydraulic load L1 and the lift amount X are acquired (S101). [0069] Next, the roller inclination angle θ is calculated based on the lift amount X (S102). [0070] Next, the radial load Lr and the thrust load Ls loaded on the journal bearing 59 are calculated (S103). [0071] Next, the remaining life of the journal bearing 59 is estimated using the radial load Lr and the thrust load Ls (S104). Regarding the estimation of the remaining life, it is possible to use information other than the radial load Lr and the thrust load Ls (for example, the design value of the journal bearing 59, etc.) depending on the estimation method. [0072] Next, the effect of the above-mentioned remaining life estimation process will be described with reference to FIG. FIG. 10 shows changes in the power plant load and the load applied to the journal bearing with respect to the operating time, and changes in the remaining life with respect to the operating time. FIG. 10 shows, as a reference example, a case where the remaining life is estimated assuming that the maximum load continues to be applied as a design value. [0073] In the reference example, assuming that the load of the power plant 1 is operated at the rated load (for example, 100% load), the load applied to the journal bearing 59 is maximized in proportion to the load of the power plant 1. Is assumed. Therefore, the remaining life decreases linearly with respect to the operating time, and it is estimated that maintenance is required at the operating time T2 in FIG. [0074] On the other hand, in the present embodiment, since the load related to the roller 13 is sequentially measured as the hydraulic load L1, the load applied to the journal bearing 59 corresponding to the actual operating state of the power plant 1 can be acquired. .. As shown in the load applied to the actual journal bearing 59 in FIG. 10 (line graph), it may be lower than the maximum load. Therefore, it is a reference when estimating the remaining life in consideration of the measured value of the roller inclination angle θ. Compared with the example, the reduction of the remaining life with respect to the operating time becomes gradual. In particular, in the period Ta of FIG. 10, since the load applied to the journal bearing 59 is low, the remaining life consumption is reduced. Since the period Ta changes according to the operating state, it is not limited to the period shown in FIG. [0075] For example, assuming that the current point is the operating time T1 in FIG. 10, it is possible to estimate the operating time T3 as the time when maintenance is required by linearly extending the transition of the remaining life in the past predetermined period from the present. .. [0076] According to the remaining life estimation of the present embodiment, it is possible to estimate the remaining life of the journal bearing 59 with higher accuracy according to the actual operating state. Therefore, a more accurate maintenance required time can be estimated as compared with the reference example (operating time is T2