JP2016217444A - Tilting pad bearing device and centrifugal compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To be able to expect improvement of a temperature reduction effect by effectively utilizing a cold lubrication oil.SOLUTION: A tilting pad bearing device includes: a plurality of bearing pads 4a for supporting a rotary shaft 3; a pivot 5a fixed at a back surface of each of the bearing pads; a bearing housing for supporting the plurality of bearing pads via the pivot; a first oil supply passage communicating with an outermost peripheral part of the bearing housing via an oil supply port; a second oil supply passage for communicating the first oil supply passage with an inner peripheral surface of the bearing housing at the position corresponding to the plurality of bearing pads; an oil supply groove 9a extending to the rotary shaft side of an upstream side inner peripheral surface of each of the plurality of bearing pads; an oil supply nozzle 10a for communicating the oil supply groove ane the second oil supply passage; and a bearing holder 12 provided at an axial direction end part of the bearing housing, and for restraining an axial direction displacement of the plurality of bearing pads. The bearing holder includes lubrication oil supply means for supplying a lubrication oil right after being supplied to a slide surface with the rotary shaft of the bearing pad to the periphery of the plurality of bearing pads.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a tilting pad bearing device and a centrifugal compressor, and more particularly to a direct lubrication type tilting pad bearing device and a centrifugal compressor that directly supply lubricating oil to a plurality of pad sliding surfaces that support a rotating shaft.

  Patent Document 1 can be cited as a prior art document of a direct lubrication type tilting pad bearing device that supplies lubricating oil directly to a plurality of pad sliding surfaces that support a rotating shaft.

  Patent Document 1 discloses a plurality of shoe assemblies including an alignment ring, an arcuate shoe having an operation surface held in the alignment ring and in bearing contact with each of the rotating shafts, and a tip of the operation surface of each shoe. Means for delivering oil to the edge, said means comprising an oil distribution groove formed across the shoe on the working surface in the vicinity of the leading edge of the shoe, and a passage means for sending oil to the oil distribution groove A journal bearing for supporting the shaft is described.

JP-A-61-65904

  Generally, it is known that a direct lubrication type tilting pad bearing device is particularly advantageous in terms of temperature reduction.

  However, in the journal bearing described in Patent Document 1, the lubricating oil is discharged out of the bearing after passing through the sliding surface, and the cold lubricating oil immediately after refueling is discharged at the same time, so that the cold lubricating oil is effectively used. However, the question remains whether the effectiveness of the temperature reduction effect is being used.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a tilting pad bearing device and a centrifugal compressor that can effectively use cold lubricating oil and can be expected to improve the temperature reduction effect. is there.

  In order to achieve the above object, the tilting pad bearing device of the present invention is fixed to a plurality of bearing pads arranged at predetermined intervals in the circumferential direction to support the rotating shaft, and to the back surface of each of the bearing pads. A pivot, a bearing housing that supports the plurality of bearing pads via the pivot, a ring extending in the circumferential direction of the bearing housing, and communicating with the outermost peripheral portion of the bearing housing via an oil filler port. A first oil supply passage, a second oil supply passage communicating the first oil supply passage and the inner peripheral surface of the bearing udging at positions corresponding to the plurality of bearing pads, and an upstream inner periphery of each of the plurality of bearing pads. An oil supply groove extending to the rotary shaft side of the surface, an oil supply nozzle communicating with the oil supply groove and the second oil supply passage, and an axial end of the bearing housing, and the axial displacement of the plurality of bearing pads. A bearing holder for bundling, and the bearing holder includes lubricating oil supply means for supplying the lubricating oil immediately after being supplied to the sliding surface of the bearing pad with the rotating shaft to the periphery of the plurality of bearing pads. It is characterized by having.

  In order to achieve the above object, the tilting pad bearing device of the present invention has a plurality of bearing pads arranged at predetermined intervals in the circumferential direction for supporting the rotating shaft, and a back surface of each of the bearing pads. A fixed pivot; a bearing housing that supports the plurality of bearing pads via the pivot; and an annular shape that extends in a circumferential direction of the bearing housing; A first oil passage that communicates, a second oil passage that communicates the first oil passage and the inner peripheral surface of the bearing wing at a position corresponding to the plurality of bearing pads, and an upstream side of each of the plurality of bearing pads An oil supply groove extending toward the rotary shaft side of the inner peripheral surface, an oil supply nozzle communicating with the oil supply groove and the second oil supply path, and an axial direction of the plurality of bearing pads provided at an axial end of the bearing housing A bearing holder that restrains the position of the bearing holder, and only the bearing pad positioned in the load direction of the bearing device is supplied with the lubricating oil immediately after being supplied to the sliding surface of the bearing pad with the rotating shaft. It is characterized by comprising a lubricating oil supply means for supplying to.

  Furthermore, the centrifugal compressor of the present invention is characterized in that the turbine and the compressor are connected via a rotating shaft, and the rotating shaft is supported by the tilting pad bearing device having the above-described configuration.

  According to the present invention, since the supplied cold lubricating oil can be recovered and supplied to the periphery of the bearing pad, the cold lubricating oil can be effectively used and an improvement in temperature reduction effect can be expected.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a radial sectional view of a rotating shaft showing a direct lubrication type tilting pad bearing device that is Embodiment 1 of the tilting pad bearing device of the present invention. It is sectional drawing along the AA line of FIG. It is a fragmentary sectional view which shows the detail of the lubricating oil supply means employ | adopted as Example 1 of the tilting pad bearing apparatus of this invention. It is a fragmentary sectional view which shows the detail of the lubricating oil supply means employ | adopted as Example 2 of the tilting pad bearing apparatus of this invention. It is a fragmentary sectional view which shows the detail of the lubricating oil supply means employ | adopted as Example 3 of the tilting pad bearing apparatus of this invention. It is a figure which shows the example of the centrifugal compressor using the tilting pad bearing apparatus as Example 5 of the tilting pad bearing apparatus of this invention.

  Hereinafter, the tilting pad bearing device and the centrifugal compressor of the present invention will be described based on the illustrated embodiments. Moreover, in each Example, the same code | symbol is used for the same component.

  In the embodiments described below, a load-on-pad type tilting pad bearing device will be described as an example. However, the present invention is not limited to other tilting pad bearing devices such as a load bite-twine. -It is applicable also to a pad (Load Between Pad) type.

  1 to 3 show a direct lubrication type tilting pad bearing device as a first embodiment of the tilting pad bearing device of the present invention.

  As shown in FIGS. 1 and 2, the direct lubrication type tilting pad bearing device 1 of this embodiment has five bearings arranged in an arc shape with a predetermined interval in the circumferential direction in order to support the rotating shaft 3. The pad bearing pads 4a, 4b, 4c, 4d, and 4e and the back surfaces of the bearing pad bearing pads 4a, 4b, 4c, 4d, and 4e, that is, outside the respective bearing pads 4a, 4b, 4c, 4d, and 4e Pivots 5a, 5b, 5c, 5d, and 5e fixed near the center of the side surface, and five bearing pad bearing pads 4a, 4b, 4c, 4d, and 4e through the pivots 5a, 5b, 5c, 5d, and 5e Bearing housing 2 (pivots 5 a, 5 b, 5 c, 5 d, and 5 e are supported so as to be swingable in contact with the inner diameter surface 2 a of the bearing housing 2), and the bearing housing 2 extends in the circumferential direction. The first oil supply passage 7 is formed in a shape and communicates with the outermost peripheral portion of the bearing housing 2 via the oil supply port 6 and the positions corresponding to the five bearing pad bearing pads 4a, 4b, 4c, 4d, and 4e. Second oil supply passages (holes provided in the bearing housing 2) 8a, 8b, 8c, 8d, 8e communicating with the one oil supply passage 7 and the inner peripheral surface of the bearing uding 2, and five bearing pad bearing pads 4a, 4b, Oil supply grooves 9a, 9b, 9c, 9d, and 9e extending toward the rotary shaft 3 on the upstream inner peripheral surface of each of 4c, 4d, and 4e, and these oil supply grooves 9a, 9b, 9c, 9d, and 9e and the second oil supply passage 8a, 8b, 8c, 8d, 8e, oil supply nozzles (annular pipes) 10a, 10b, 10c, 10d, 10e, and five bearing pad bearing pads provided at the axial end of the bearing housing 2 4a, 4b, 4c, 4d, 4e axial change It is schematically composed of the bearing holder 12 for constraining the.

  In this embodiment, in order to efficiently use the cold lubricating oil discharged from the sliding surface, only the cold lubricating oil is collected and supplied around the bearing pads 4a, 4b, 4c, 4d, and 4e. More specifically, the lubricating oil immediately after the supply when the bearing holder 12 is supplied to the sliding surfaces of the five bearing pad bearing pads 4a, 4b, 4c, 4d, and 4e with the rotary shaft 3 is provided. Is provided with lubricating oil supply means for supplying the periphery of the five bearing pads 4a, 4b, 4c, 4d and 4e.

  Details of the lubricating oil supply means in the present embodiment will be described with reference to FIG.

  As shown in FIG. 3, the lubricating oil supply means of the present embodiment is formed such that the inner peripheral side of the bearing holder 12 is continuous in the circumferential direction (over the entire circumference) (see FIG. 1). Of the bearing pads 4a, 4b, 4c, 4d, and 4e is prevented from flowing out in the axial direction immediately after being supplied to the sliding surface of the bearing pads 4a, 4b, 4c, 4d, and 4e. The lubricating oil that is prevented from flowing out is supplied to the periphery of the plurality of bearing pads 4a, 4b, 4c, 4d, and 4e.

  That is, the convex portion 12a of the bearing holder 12 is located at both ends adjacent to the bearing pads 4a, 4b, 4c, 4d, and 4e including the oil supply grooves 9a, 9b, 9c, 9d, and 9e. The recess 12b is located in the bearing pads 4a, 4b, 4c, 4d, and 4e other than where the protrusion 12a of the bearing holder 12 is located, and is supplied from the oil supply grooves 9a, 9b, 9c, 9d, and 9e. The lubricating oil guided by the convex portion 12a of the bearing holder 12 flows into the concave portion 12b of the bearing holder 12 and flows in the circumferential direction, thereby being supplied to the periphery of the bearing pads 4a, 4b, 4c, 4d, and 4e. Is.

  The lubricating oil immediately after being supplied to the sliding surfaces of the bearing pads 4a, 4b, 4c, 4d, and 4e with the rotating shaft 3 is the oil supply port 6, the first oil supply path 7, and the second oil supply paths 8a and 8b. 8c, 8d, 8e, oil supply nozzles 10a, 10b, 10c, 10d, 10e and oil supply grooves 9a, 9b, 9c, 9d, 9e.

  As shown in FIG. 3, when the lubricating oil is supplied from the oil supply groove 9 a to the sliding surface of the bearing pad 4 a through the oil supply nozzle 10 a, the lubricating oil is rotated between the bearing pad 4 a and the rotating shaft 3 by the rotation 11 of the rotating shaft 3. Flows in between. After the lubricating oil flows between the bearing pad 4a and the rotary shaft 3, a part of the lubricating oil flows out from the axial side of the bearing pad 4a. The lubricating oil that flows out immediately after inflow is cold because it has a small amount of heat generated by shearing force, but the lubricating oil that flows out after a certain amount of time after inflow is hot because it has a large amount of heat generation. The lubricating oil that flows out immediately after flowing in cannot be discharged from the axial direction because the bearing holder 12 having a different shape (formed in a concavo-convex shape) exists along the circumferential direction. It flows along 13. Since the lubricating oil that has flowed out after a certain amount of time has not been blocked by the bearing holder 12 in the axial direction, it flows out in the axial direction. For this reason, the cooling performance can be improved by supplying the lubricating oil recovered by the bearing holder 12 to the periphery of the pad.

  Therefore, according to the present embodiment, the supplied cold lubricating oil can be recovered and supplied to the periphery of the bearing pads 4a, 4b, 4c, 4d, and 4e. Improvement can be expected.

  FIG. 4 shows lubricating oil supply means that is Embodiment 2 of the tilting pad bearing device of the present invention.

  As shown in FIG. 4, the lubricating oil supply means of the present embodiment has a flow path 14 formed on the side of the bearing pad 4a facing the bearing holder 12 (the same applies to the other bearing pads 4b, 4c, 4d, and 4e). A part of the lubricating oil supplied from the oil supply groove 9a flows out from the axial direction side of the bearing pad 4a, and the flowing lubricating oil flows into the flow path 14 to be supplied to the periphery of the bearing pad 4a. (The same applies to the other bearing pads 4b, 4c, 4d, and 4e).

  That is, when lubricating oil is supplied from the lubricating groove 9 a to the sliding surface of the bearing pad 4 a through the lubricating nozzle 10 a, the lubricating oil flows between the bearing pad 4 a and the rotating shaft 3 by the rotation 11 of the rotating shaft 3. After the lubricating oil flows between the bearing pad 4a and the rotary shaft 3, a part of the lubricating oil flows out from the axial side of the bearing pad 4a. A part of the lubricating oil about to flow out is collected by the bearing holder 12 and flows into the flow path 14 around the bearing pad 4a, so that the cooling performance can be improved.

  Therefore, according to the present embodiment, the supplied cold lubricating oil can be recovered and supplied to the periphery of the bearing pads 4a, 4b, 4c, 4d, and 4e. Improvement can be expected.

  FIG. 5 shows lubricating oil supply means that is Embodiment 3 of the tilting pad bearing device of the present invention.

  As shown in FIG. 5, in the lubricating oil supply means of this embodiment, the inner peripheral side of the bearing holder 12 is continuously formed in an uneven shape in the circumferential direction, and the rotation of the bearing pad 4a is performed by the uneven bearing holder 12. The lubricating oil supplied to the sliding surface with the shaft 3 was prevented from flowing out in the axial direction immediately after the supply (the same applies to the other bearing pads 4b, 4c, 4d, and 4e), and the flowing out in the axial direction was prevented. Lubricating oil is supplied to the periphery of the bearing pad 4a, and a flow path 14 is formed on the side of the bearing pad 4a facing the bearing holder 12 (the same applies to the other bearing pads 4b, 4c, 4d, and 4e). ), A part of the lubricating oil supplied from the oil supply groove 9a flows out from the axial direction side of the bearing pad 4a, and the flowing lubricating oil flows into the flow path 14 to be supplied to the periphery of the bearing pad 4a. .

  That is, when lubricating oil is supplied from the lubricating groove 9 a to the sliding surface of the bearing pad 4 a through the lubricating nozzle 10 a, the lubricating oil flows between the bearing pad 4 a and the rotating shaft 3 by the rotation 11 of the rotating shaft 3. After the lubricating oil flows between the bearing pad 4a and the rotary shaft 3, a part of the lubricating oil flows out from the axial side of the bearing pad 4a. The lubricating oil that flows out immediately after inflow is cold because it has a small amount of heat generated by shearing force, but the lubricating oil that flows out after a certain amount of time after inflow is hot because it has a large amount of heat generation. The lubricating oil flowing out immediately after inflow cannot be discharged from the axial direction because the bearing holders 12 having different shapes along the circumferential direction exist, and flow along the lubricating oil flow 13 in FIG. Since the lubricating oil that has flowed out after a certain amount of time has not been blocked by the bearing holder 12 in the axial direction, it flows out in the axial direction. For this reason, the lubricating oil collected by the bearing holder 12 flows into the flow path 14 around the bearing pad 4a, so that the cooling performance can be improved.

  Therefore, according to the present embodiment, the supplied cold lubricating oil can be recovered and supplied to the periphery of the bearing pads 4a, 4b, 4c, 4d, and 4e. As a matter of course, the effects of Embodiments 1 and 2 can be obtained, so that a more remarkable effect can be expected.

  Although not shown in particular, Embodiment 4 of the tilting pad bearing device of the present invention will be described.

  In the present embodiment, the bearing holder 12 described above is a bearing in which the lubricating oil immediately after being supplied to the sliding surface of the bearing pad 4a with the rotating shaft 3 is positioned in the load direction of the bearing device (W direction in FIG. 1). Lubricating oil supply means for supplying only to the pad 4a is provided.

  This lubricating oil supply means uses the same configuration as that of the first embodiment, the second embodiment, or the third embodiment described above, and is not specifically described here.

  Even in such a configuration, the supplied cold lubricating oil can be recovered and supplied to the periphery of the bearing pad 4a. Therefore, the cold lubricating oil can be effectively used and an improvement in temperature reduction effect can be expected.

  FIG. 6 shows an example of a centrifugal compressor using the tilting pad bearing device 1 described above.

  As shown in the figure, in the centrifugal compressor of this embodiment, a turbine 16 and a compressor 15 are connected via a rotating shaft 3, and the rotating shaft 3 is one of the tilting pads described in the first to third embodiments. The bearing device 1 is supported and configured.

  Thus, the reliability of the centrifugal compressor is improved by using the tilting pad bearing device 1.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  ... tilting pad bearing device, 2 ... bearing housing, 2a ... inner diameter surface of bearing housing, 3 ... rotating shaft, 4a, 4b, 4c, 4d, 4e ... bearing pad, 5a, 5b, 5c, 5d, 5e ... pivot, 6 ... oil supply port, 7 ... first oil supply passage, 8a, 8b, 8c, 8d, 8e ... second oil supply passage, 9a, 9b, 9c, 9d, 9e ... oil supply groove, 10a, 10b, 10c, 10d, 10e ... Oil supply nozzle, 11 ... rotation of rotating shaft, 12 ... bearing holder, 12a ... convex portion of bearing holder, 12b ... concave portion of bearing holder, 13 ... flow of lubricating oil, 14 ... flow path, 15 ... compressor, 16 ... turbine .

Claims (12)

A plurality of bearing pads arranged at predetermined intervals in the circumferential direction to support the rotating shaft, a pivot fixed to the back surface of each bearing pad, and a bearing housing that supports the plurality of bearing pads via the pivot A first oil supply passage that extends in the circumferential direction of the bearing housing and is formed in an annular shape and communicates with an outermost peripheral portion of the bearing housing via an oil supply port, and at positions corresponding to the plurality of bearing pads. A second oil supply passage communicating the one oil supply passage and the inner peripheral surface of the bearing uding; an oil supply groove extending to the rotary shaft side of each upstream inner peripheral surface of the plurality of bearing pads; the oil supply groove and the first oil supply passage; An oil supply nozzle that communicates with the two oil supply paths, and a bearing holder that is provided at an axial end portion of the bearing housing and restrains axial displacement of the plurality of bearing pads,
The bearing holder includes lubricating oil supply means for supplying the lubricating oil immediately after being supplied to the sliding surface of the bearing pad with the rotating shaft to the periphery of the plurality of bearing pads. Tilting pad bearing device. The tilting pad bearing device according to claim 1,
The lubricating oil immediately after being supplied to the sliding surface of the bearing pad with the rotating shaft is supplied through the oil supply port, the first oil supply passage, the second oil supply passage, the oil supply nozzle, and the oil supply groove. A tilting pad bearing device. The tilting pad bearing device according to claim 1 or 2,
The lubricating oil supply means has an inner circumferential side of the bearing holder that is continuously formed in a concavo-convex shape in the circumferential direction, and is supplied to the sliding surface of the bearing pad with the rotating shaft by the concavo-convex bearing holder. The tilting pad is characterized in that the lubricating oil is prevented from flowing out in the axial direction immediately after being supplied, and the lubricating oil, which is prevented from flowing out in the axial direction, is supplied to the periphery of the plurality of bearing pads. Bearing device. In the tilting pad bearing device according to claim 3,
The bearing holder has convex portions located at both ends adjacent to the bearing pad including the oil supply groove, and the concave portions of the bearing holder are not located at the convex portions of the bearing holder. The lubricating oil that is located in the portion and is supplied from the oil supply groove is guided by the convex portion of the bearing holder, flows into the concave portion of the bearing holder, and flows in the circumferential direction, so that a plurality of the bearing pads are provided. A tilting pad bearing device which is supplied to the periphery. The tilting pad bearing device according to claim 1 or 2,
In the lubricating oil supply means, a flow path is formed on a side surface of the plurality of bearing pads facing the bearing holder, and a part of the lubricating oil supplied from the oil supply groove is from an axial direction side of the bearing pad. The tilting pad bearing device is characterized in that it flows out and is supplied to the periphery of the plurality of bearing pads by flowing into the flow path. The tilting pad bearing device according to claim 1 or 2,
The lubricating oil supply means has an inner circumferential side of the bearing holder that is continuously formed in a concavo-convex shape in the circumferential direction, and is supplied to the sliding surface of the bearing pad with the rotating shaft by the concavo-convex bearing holder. The lubricating oil is prevented from flowing out in the axial direction immediately after being supplied, and the lubricating oil that is prevented from flowing out in the axial direction is supplied to the periphery of the plurality of bearing pads. A flow path is formed on the side surface facing the bearing holder, a part of the lubricating oil supplied from the oil supply groove flows out from the axial side of the bearing pad, and the flowed out lubricating oil flows into the flow path. The tilting pad bearing device is provided around the plurality of bearing pads by flowing into the bearing pad. A plurality of bearing pads arranged at predetermined intervals in the circumferential direction to support the rotating shaft, a pivot fixed to the back surface of each bearing pad, and a bearing housing that supports the plurality of bearing pads via the pivot A first oil supply passage that extends in the circumferential direction of the bearing housing and is formed in an annular shape and communicates with an outermost peripheral portion of the bearing housing via an oil supply port, and at positions corresponding to the plurality of bearing pads. A second oil supply passage communicating the one oil supply passage and the inner peripheral surface of the bearing uding; an oil supply groove extending to the rotary shaft side of each upstream inner peripheral surface of the plurality of bearing pads; the oil supply groove and the first oil supply passage; An oil supply nozzle that communicates with the two oil supply paths, and a bearing holder that is provided at an axial end portion of the bearing housing and restrains axial displacement of the plurality of bearing pads,
The bearing holder includes lubricating oil supply means for supplying the lubricating oil immediately after being supplied to the sliding surface of the bearing pad with the rotating shaft only to the bearing pad located in the load direction of the bearing device. A tilting pad bearing device. The tilting pad bearing device according to claim 7,
The lubricating oil immediately after being supplied to the sliding surface of the bearing pad with the rotating shaft is supplied through the oil supply port, the first oil supply passage, the second oil supply passage, the oil supply nozzle, and the oil supply groove. A tilting pad bearing device. The tilting pad bearing device according to claim 7 or 8,
The lubricating oil supply means is formed such that the circumferential direction on the inner peripheral side of the bearing holder of only the bearing pad that is located in the load direction of the bearing device is uneven, and the uneven bearing holder The lubricating oil that has been supplied to the sliding surface with the rotating shaft is prevented from flowing out in the axial direction immediately after being supplied, and the lubricating oil that has been prevented from flowing out in the axial direction is positioned in the load direction of the bearing device. A tilting pad bearing device, wherein the tilting pad bearing device is supplied only to the bearing pad. The tilting pad bearing device according to claim 7 or 8,
In the lubricating oil supply means, a flow path is formed on a side surface facing the bearing holder of only the bearing pad located in the load direction of the bearing device, and a part of the lubricating oil supplied from the oil supply groove is formed. The bearing oil flows out from the axial direction side of the bearing pad, and the lubricating oil that has flowed out flows into the flow path so as to be supplied only to the bearing pad positioned in the load direction of the bearing device. Tilting pad bearing device. The tilting pad bearing device according to claim 7 or 8,
The lubricating oil supply means is formed such that the circumferential direction on the inner peripheral side of the bearing holder of only the bearing pad that is located in the load direction of the bearing device is uneven, and the uneven bearing holder The lubricating oil that has been supplied to the sliding surface with the rotating shaft is prevented from flowing out in the axial direction immediately after being supplied, and the lubricating oil that has been prevented from flowing out in the axial direction is positioned in the load direction of the bearing device. In addition to being supplied only to the bearing pad, a flow path is formed on a side surface facing the bearing holder of only the bearing pad positioned in the load direction of the bearing device, and the flow path is supplied from the oil supply groove. Part of the lubricating oil flows out from the axial direction side of the bearing pad, and the lubricating oil that has flowed out flows into the flow path so that only the bearing pad positioned in the load direction of the bearing device is supplied. Specially Tilting pad bearing device according to.   A turbine and a compressor are connected via a rotating shaft, and the rotating shaft is supported by the tilting pad bearing device according to any one of claims 1 to 11.

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