JP2010151283A - Bearing device and rotary machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device capable of effectively supplying new low-temperature lubricating oil between bearing pads and a thrust collar while preventing the carry-over of the lubricating oil. <P>SOLUTION: The bearing device includes: a bearing housing 2 arranged opposing to the thrust collar 107; the plurality of bearing pads 3 arranged between the bearing housing 2 and the thrust collar 107 along the circumferential direction leaving an interval and rotatably supporting the thrust collar 107; and an oiling member 4 provided in the interval between the bearing pads 3 in the vicinity of the thrust collar 107. The oiling member 4 includes: a wedge forming face 10 provided on the rear side P1 in the rotating direction P of the thrust collar 107 and generating a wedge effect by the lubricating oil between the wedge forming face 10 and the thrust collar 107; a supply means 11 provided on the forward side P1 in the rotating direction P from the wedge forming face 10 and supplying the lubricating oil; and a discharge means 12 provided between the wedge forming face 10 and the supply means 11 and discharging the lubricating oil. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bearing device applied to rotating machines such as a steam turbine, a gas turbine, a compressor, and a supercharger, and a rotating machine including the bearing device.

Conventionally, in a rotating machine such as a steam turbine, a gas turbine, a compressor, and a supercharger, the thrust force acting on the rotating shaft is supported by a thrust bearing device, whereby the rotating shaft is rotated around the axis while receiving the thrust force. It is possible to rotate. Such a bearing device includes a circumferentially formed segment composed of a lubrication port and a bearing pad composed of a taper portion and a land portion, and a plurality of continuous segments, and an oil scraper provided in the segment lubrication port. And an oil scraper formed on the surface and inclined toward the rear surface from the rear side to the front side in the rotational direction of the rotating shaft, and provided on the rear side in the rotational direction, for scraping the lubricating oil A configuration having a blade has been proposed (see, for example, Patent Document 1). In such a bearing device, when the rotating shaft rotates, the oil scraper generates negative pressure between the tapered surface and the sliding surface of the thrust collar, and lubricates the lubricating oil supplied to the oiling port on the back surface. When the pressure acts, it floats toward the sliding surface of the thrust collar, scrapes off the high-temperature lubricating oil flowing out from the bearing pad on the rear side in the rotational direction and on the front side in the rotational direction. Low temperature lubricating oil in the oil supply port is supplied to the bearing pad.
JP 2008-101750 A

  However, in the bearing device as in Patent Document 1, when the negative pressure generated between the tapered surface and the sliding surface of the thrust collar is low and the floating amount toward the thrust collar of the oil scraper is small, the rotation direction High temperature lubricating oil flowing out from the rear bearing pad cannot be effectively scraped off by the blade. As a result, a so-called carry-over phenomenon occurs in which high-temperature lubricating oil that flows out from the bearing pad on the rear side in the rotational direction of the oil scraper flows into the bearing pad on the front side. For this reason, the oil film on the bearing pad is formed by mixing the new low-temperature lubricant supplied from the oil groove with the high-temperature lubricant that has been carried over to supply new low-temperature lubricant. Even so, the oil film on the bearing pad could not be effectively lowered. As a result, there has been a problem that the lubricating oil deteriorates due to the temperature rise of the oil film and the lubricating performance is lowered, and the bearing pad itself also rises in temperature and causes a decrease in strength.

  The present invention has been made in view of the above-described circumstances, and can effectively supply new low-temperature lubricating oil between the bearing pad and the thrust collar while preventing carry-over of the lubricating oil. A bearing device is provided.

In order to solve the above problems, the present invention proposes the following means.
A bearing device according to the present invention includes a bearing housing that is axially opposed to a thrust collar provided on a rotating shaft and is supplied with lubricating oil between the thrust collar, and the bearing housing and the thrust collar. A plurality of bearing pads that are arranged to be spaced apart from each other along the circumferential direction of the rotating shaft and rotatably support the thrust collar, and close to the thrust collar at an interval between the bearing pads And an oil supply member that supplies the lubricating oil. The oil supply member is provided on the rear side in the rotation direction of the thrust collar, and generates a wedge effect due to the lubricating oil between the thrust collar and the oil supply member. A wedge-forming surface, a supply means provided on the front side in the rotational direction from the wedge-forming surface, for supplying the lubricating oil, and the wedge-forming surface and the supply means Provided, it is characterized by having a discharge means for discharging the lubricating oil.

  According to this structure, the oil film formed with the lubricating oil that moves from the rear side in the rotational direction to the front side in accordance with the rotation of the thrust collar by the oil supply member provided in the space between the bearing pads having the wedge forming surface. As a result, a wedge effect is generated. For this reason, a pressure due to the wedge effect acts between the thrust collar and the oil supply member, and thus it is possible to reliably prevent the oil supply member from coming into contact with the thrust collar. In addition, the oil supply member is provided close to the thrust collar, and the wedge effect is generated to increase the pressure of the oil film, thereby restricting the carry over of the lubricating oil from the rear side to the front side in the rotation direction. Become. Further, since the discharging means is provided on the front side in the rotational direction by the wedge forming surface, the lubricating oil moving from the rear to the front in the rotational direction is effective for passing through the wedge forming surface while being restricted. Can be discharged. For this reason, the lubricating oil carried over from the rear side is prevented from being mixed between the bearing pad and the thrust collar located on the front side in the rotational direction with respect to the lubricating member, while the discharging means in the lubricating member is prevented. New lubricating oil can be effectively supplied from the supply means provided on the front side in the rotational direction.

  In the above bearing device, it is more preferable that the oil supply member is provided so as to be able to advance and retract toward the thrust collar, and includes an urging means for urging the oil supply member toward the thrust collar.

  According to this configuration, the oil supply member can be moved forward and backward toward the thrust collar, and is urged toward the thrust collar by the urging means, so that the oil supply member is thrust by the wedge effect generated by the wedge forming surface. It is possible to make the position closer to each other while preventing contact with the collar. For this reason, it is possible to more effectively limit the carry-over of the lubricating oil from the rear side in the rotational direction to the front side.

  In the above bearing device, it is more preferable that the axial rigidity of the biasing means is set smaller than the axial rigidity of the bearing pad.

  According to this configuration, since the axial rigidity of the biasing means is set to be smaller than the axial rigidity of the bearing pad, the wedge effect by the wedge forming surface is supported while the thrust collar is reliably supported by the bearing pad. Thus, the oil supply member can be positioned so as not to contact the thrust collar against the urging by the urging means.

  Moreover, in the above-described bearing device, it is more preferable to include a restricting portion capable of restricting the oil supply member from moving toward the thrust collar.

  According to this structure, it can control that an oil supply member moves toward a thrust collar by a control part. For this reason, it can prevent reliably contacting with a thrust collar by a control part, moving an oil supply member so that it may adjoin to a thrust collar.

  In the above bearing device, it is more preferable that a protective layer that is easy to fit and hard to seize is formed on at least the surface of the oil supply member that is closest to the thrust collar.

  According to this configuration, the oil supply member is easily fitted on the surface closest to the thrust collar and has a protective layer that is difficult to seize, so even if it contacts the thrust collar for any reason, it is damaged. Can be prevented.

A rotating machine according to the present invention is characterized in that the rotating shaft is supported by the bearing device.
According to this configuration, the above-described bearing device causes the lubricating oil to have a high temperature and the lubrication performance is deteriorated, and the bearing pad is prevented from increasing in temperature and decreasing in strength. Thus, the rotating shaft can be reliably supported in the axial direction.

  In the bearing device of the present invention, the oil supply member is provided in the vicinity of the thrust collar and has a wedge forming surface, so that the lubricant oil can be effectively prevented from being carried over while the lubricant oil is prevented from being carried over. Thus, the rotating shaft can be reliably supported while maintaining the lubricating performance of the lubricating oil.

  A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a steam turbine 100 as an example of a rotating machine on which a bearing device according to the present embodiment is mounted. The steam turbine 100 includes an adjustment valve 101 that adjusts the amount and pressure of steam (working fluid) flowing into the steam turbine 100, a casing 102 that holds the pressure, a power generation unit 103 that generates power, a compressor, and the like. The main structure is a rotary shaft 105 that transmits to the machine, a journal bearing device 106 and a thrust bearing device 1 (bearing device) that rotatably support the rotary shaft 105 about its axis. The rotating shaft 105 is provided with a thrust collar 107 in a substantially flange shape. The thrust bearing device 1 is disposed so as to face the thrust collar 107 in the axial direction, thereby supporting the rotating shaft 105 in the axial direction via the thrust collar 107. Details will be described later.

  A plurality of regulating valves 101 are attached to the inside of the casing 102, and each includes a regulating valve chamber 108 into which steam flows from a boiler (not shown), a valve body 109, and a valve seat 110. The valve seat 110 has a substantially cylindrical shape, and its axis is orthogonal to the axis of the rotating shaft 105. The inner diameter of the valve seat 110 gradually increases in the direction toward the rotation shaft 105, and the tip portion communicates with the steam chamber 111. The inner surface of the end opposite to the steam chamber 111 of the valve seat 110 forms a curved surface 110a having a convex curvature inside. The lower shape of the valve body 109 forms a part of a sphere, and is provided so as to be able to contact and separate from the curved surface 110a of the valve seat 110. When the valve body 109 moves away from the valve seat 110, the steam flow path opens, and when the valve body 109 contacts the valve seat 110, the steam flow path is closed. The regulating valve 101 controls the steam flow rate by opening and closing the valve body 109. Further, the output of the steam turbine is controlled by adjusting the opening / closing timing of the plurality of regulating valves 101.

  The steam chamber 111 guides the steam flowing in from the regulating valve 101 to the power generation unit 103 and has a substantially donut shape. The steam flow path of the steam chamber 111 becomes narrower toward the inside and is deflected in a direction parallel to the axis of the rotation shaft 105.

  The power generation unit 103 includes a nozzle 112 fixed to the casing 102 and a moving blade 113 attached to the rotating shaft 105. One set of the nozzle 112 and the moving blade 113 is referred to as a paragraph, and in this embodiment, six paragraphs are provided. The nozzle 112 expands the steam in the steam passage to generate velocity energy, and changes the flow direction to create a momentum in the rotational direction of the shaft. The moving blade 113 acts to convert the steam energy converted into velocity energy by the nozzle 112 into the rotation energy of the rotating shaft 105.

  A large number of nozzles 112 are arranged radially and are held by a ring-shaped partition plate outer ring 114 and a ring-shaped partition plate inner ring 115 firmly fixed to the casing 102. Between the end of the inner ring 115 of the partition plate on the rotating shaft 105 side and the rotating shaft 105, a seal structure that prevents steam leakage is formed. In the paragraph with high steam pressure, the labyrinth structure is adopted as the seal structure.

  A large number of moving blades 113 are arranged radially, and are firmly attached to the outer peripheral portion of a disk 116 that protrudes from the rotating shaft 105 and is provided in a cylindrical shape. A shroud 117 is attached to the tip of the moving blade 113 at the final stage, and a fin for preventing steam leakage is attached to a position facing the shroud 117 on the partition plate outer ring 114 side.

  The rotating shaft 105 rotatably supported by the journal bearing device 106 and the thrust bearing device 1 acts to transmit the power generated by the power generating unit 103 to a machine such as a compressor. Between the rotating shaft 105 and the casing 102, a seal structure for preventing leakage of steam or the like is provided. The exhaust steam that has finished work by operating the steam turbine 100 is sent through an exhaust chamber 118 to a condenser (not shown).

  Next, the thrust bearing device 1 that supports the rotating shaft 105 in the axial direction A will be described with reference to FIGS. 2 to 5. As shown in FIGS. 2 to 4, the thrust bearing device 1 includes a bearing housing 2 that is supported by a bearing stand 120 fixed to a device main body (not shown) and is disposed to face the thrust collar 107, and a bearing housing 2. And a plurality of bearing pads 3 provided between the bearing collar 3 and the thrust collar 107 to rotatably support the thrust collar 107, and an oil supply member 4 that supplies lubricating oil using an oil tank between the bearing pad 3 and the thrust collar 107. Prepare.

  The bearing housing 2 includes a substantially annular housing body 5 and a plurality of protrusions 6 arranged in the circumferential direction B on the surface of the housing body 5 facing the thrust collar 107 and projecting toward the thrust collar 107. The bearing pads 3 are spaced from each other in the circumferential direction B which is the rotational direction P of the rotary shaft 105 and the thrust collar 107 on the housing body 5 so as to be accommodated between the protrusions 6. Are arranged. The bearing pad 3 supports the thrust collar 107 with the surface facing the thrust collar 107 as a support surface 3a, and is supported by the housing body 5 on the opposite side.

  Further, the oil supply member 4 is supported by the protrusions 6 of the bearing housing 2 at intervals between the bearing pads 3. More specifically, as shown in FIG. 5, the oil supply member 4 extends in the radial direction along the interval between the bearing pads 3, and the thrust collar 107 is formed in the housing recess 6 a formed in the protrusion 6. And a main body portion 8 projecting from the base portion 7 toward the thrust collar 107. In the main body 8, a wedge forming surface 10 that is located on the rear side P <b> 1 in the rotation direction P of the thrust collar 107 and that generates a wedge effect by the lubricating oil is positioned at a position facing the thrust collar 107, and is rotated more than the wedge forming surface 10. Supply means 11 for supplying the lubricating oil at a position on the front side P2 in the direction P, and discharging means 12 for collecting and discharging the lubricating oil between the position where the supplying means 11 supplies the lubricating oil and the wedge forming surface 10 Have.

  Specifically, the wedge forming surface 10 is inclined with respect to the supported surface 107a of the thrust collar 107 so as to face the rotation direction P rear side P1, that is, from the rotation direction P rear side P1 toward the front side P2. The surface is gradually inclined so as to approach the supported surface 107a of the thrust collar 107. Further, a tip surface 13 that is substantially parallel to the supported surface 107a of the thrust collar 107 is formed on the rear side P1 in the rotational direction P from the wedge forming surface 10, and further, a wedge forming surface is provided on the rear side P1. In this embodiment, the wedge forming surface 10, the tip surface 13, and the inclined surface 14 are formed so as to be substantially symmetrical with respect to the circumferential direction B. In the refueling member 4, a protective layer 15 that is easy to fit in and hard to seize is provided on the tip surface 13 closest to the thrust collar 107.

  The supply means 11 has an opening 15a on the radially outer peripheral side of the oil supply member 4 and communicates with the oil supply communication hole 15 formed in the oil supply member 4, the oil supply communication hole 15, and the opening 16a on the inclined surface 14. And the discharge hole 16. A plurality of discharge holes 16 are formed along the radial direction, and the lubricating oil can be discharged over the entire radial direction. The supply means 11 can supply the lubricating oil to the inside by discharging the lubricating oil supplied from the opening 15 a of the oil supply communication hole 15 through the oil supply communication hole 15 and from the opening 16 a of the discharge hole 16. ing.

  Further, the discharge means 12 has one opening 17a formed in the distal end surface 13 and extending toward the base end side, and the other opening 17b on the base end side in the rotational direction P rear side P1 of the oil supply member 4. It has the discharge hole 17 formed in the side surface. A plurality of discharge holes 17 are formed along the radial direction, and the lubricating oil can be collected over the entire radial direction. The discharge means 12 discharges the lubricating oil collected from one opening 17a from the other opening 17b through the discharge hole 17, and passes through the gap between the oil supply member 4 and the bearing pad 3 on the rear side P1 in the rotational direction P. It is possible to discharge to the outer circumferential side.

  In addition, a first locked piece 18 is provided on the base portion 7 accommodated in the accommodating recess 6a of the projecting portion 6 so as to project. On the other hand, a locking piece 6b that protrudes inward is provided on the distal end side of the protruding portion 6, and the oil supply member 4 faces the thrust collar 107 in a state where the base portion 7 is accommodated in the accommodating recess 6a. The first locked piece 18 and the locking piece 6b are engaged with each other at a position where the front end surface 13 of the main body 8 is not in contact with the thrust collar 107. As described above, it is possible to restrict the oil supply member 4 from moving toward the thrust collar 107, that is, the first locking piece 18 and the locking piece 6 b constitute a regulating portion 19.

  Further, in the oil supply member 4, the main body portion 8 is provided with a second locked piece 20 protruding so that the second locked piece 20 comes into contact with the tip of the protruding portion 6, It is possible to restrict the oil supply member 4 from moving further in the direction away from the thrust collar 107. For this reason, the oil supply member 4 advances and retreats toward the thrust collar 107 within a certain range by its own first locked piece 18 and second locked piece 20 and the protruding portion 6 of the bearing housing 2. It is possible. Further, a spring material 21 is interposed as an urging means between the end surface 7 a of the base portion 7 of the oil supply member 4 and the bottom surface 6 c of the housing recess 6 a, and the oil supply member 4 is moved in the axial direction A by the spring material 21. Is urged toward the thrust collar 107. The rigidity of the spring material 21 in the axial direction A is set smaller than the rigidity of the bearing pad 3 in the axial direction A.

  Next, the operation of the thrust bearing device 1 of this embodiment will be described. As shown in FIG. 1, when the steam turbine 100 is operated, the rotating shaft 105 rotates around its own axis. As shown in FIGS. 2 to 4, the bearing housing 2 is disposed between the support surface 3 a of the bearing pad 3 and the supported surface 107 a of the thrust collar 107 in the thrust bearing device 1 as the rotary shaft 105 rotates. An oil film is formed by lubricating oil existing as an oil tank between the thrust collar 107 and the thrust collar 107 provided on the rotary shaft 105 has a gap with the support surface 3a of the bearing pad 3 due to the pressure of the oil film. It is supported in the state and rotates in a predetermined rotation direction P.

  Here, the lubricating oil between the support surface 3a of the bearing pad 3 and the supported surface 107a of the thrust collar 107 moves toward the oil supply member 4 on the front side P2 in the rotational direction P as the thrust collar 107 rotates. Will be. A wedge forming surface 10 is provided on the rear side P1 in the rotational direction P of the oil supply member 4 so as to face the rear side P1 and incline so as to approach the thrust collar 107 from the rear side P1 toward the front side P2. As a result, a wedge effect is generated, and a pressure due to the wedge effect acts between the oil supply member 4 and the thrust collar 107. For this reason, it is possible to reliably prevent the oil supply member 4 from coming into contact with the thrust collar 107 while approaching it. In particular, in the present embodiment, the oil supply member 4 is urged toward the thrust collar 107 by the spring material 21 while allowing the oil supply member 4 to advance and retract toward the thrust collar 107, so that the oil supply member 4 is moved by the wedge forming surface 10. While preventing contact with the thrust collar 107 due to the generated wedge effect, the position can be made closer.

  The oil supply member 4 is provided close to the thrust collar 107, and the wedge effect is generated to increase the pressure of the oil film, thereby causing the carryover of the lubricating oil from the rotation direction P rear side P1 to the front side P2. It will be limited. And since the one opening 17a of the discharge hole 17 of the discharge means 12 is formed in the rotation direction P front side P2 from the wedge forming surface 10, the lubricating oil moving from the rotation direction P rear side P1 to the front side P2 is reduced. Those that pass while being restricted on the wedge forming surface 10 can be effectively recovered and discharged from the discharge hole 17. For this reason, while preventing the lubricating oil carried over from the rear side P1 from being mixed between the bearing pad 3 and the thrust collar 107 positioned on the front side P2 in the rotational direction P with respect to the oil supply member 4, New lubrication is provided between the bearing pad 3 and the thrust collar 107 in the rotation direction P front side P2 from the opening 16a of the supply hole 16 of the supply means 11 provided on the rotation direction P front side P2 of the discharge means 12 in the oil supply member 4. Oil can be supplied effectively.

  As described above, in the thrust bearing device 1 of the present embodiment, the oil supply member 4 is provided in the vicinity of the thrust collar 107 and has the wedge forming surface 10, thereby preventing the carryover of the lubricating oil at a low temperature. New lubricating oil can be effectively supplied between the bearing pad 3 and the thrust collar 107, whereby the rotating shaft 105 can be reliably supported while maintaining the lubricating performance of the lubricating oil. Further, in the present embodiment, the oil supply member 4 can move forward and backward toward the thrust collar 107 and can be brought closer to the thrust collar 107 by being biased by the spring material 21. The carry-over of the lubricating oil from the rotation direction P rear side P1 to the front side P2 can be more effectively limited. On the other hand, by providing the restricting portion 19, it is possible to reliably prevent the oil supply member 4 from coming into contact with the thrust collar 107. Further, since the rigidity of the spring material 21 in the axial direction A is set to be smaller than the rigidity of the bearing pad 3 in the axial direction A, the thrust collar 107 is reliably supported by the bearing pad 3 and the wedge forming surface is formed. Due to the wedge effect of 10, the oil supply member 4 can be positioned so as not to contact the thrust collar 107 against the biasing force of the spring material 21. Furthermore, the oil supply member 4 is easily damaged on the surface closest to the thrust collar 107 and has a protective layer 15 that is hard to be seized. Can be prevented.

  In the above description, the supply unit 11 has the supply communication hole 15 and the supply hole 16 and the discharge unit 12 has the discharge hole 17. However, the present invention is not limited to this, and a different structure may naturally be used. 6 to 8 show a second embodiment. In the thrust bearing device 30 of this embodiment, the structure of the discharging means is different. That is, as shown in FIGS. 6 to 8, the discharge means 32 of the oil supply member 31 provided at the interval between the bearing pads 3 has a discharge groove 33 formed on the tip surface 13. The discharge groove 33 is formed along the radial direction on the distal end surface 13. For this reason, the lubricating oil that has passed through the wedge forming surface 10 is collected inside the discharge groove 33 and is discharged along the discharge groove 33 to the outer peripheral side in the radial direction. New lubricating oil can be supplied to the thrust collar 107 by the supply means 11.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

  In each of the above embodiments, the oil supply member has the wedge forming surface 10, the tip surface 13, and the inclined surface 14 at a position facing the thrust collar 107, but is not limited thereto. If at least the wedge forming surface 10 for generating the wedge effect is provided, the lubricating oil is discharged by the discharging means at the front side P1 in the rotation direction P, and new lubricating oil is supplied by the supplying means at the front side P. good. In the above embodiment, the oil supply member is provided as one member as the wedge forming surface 10, the discharging unit, and the supplying unit. However, the present invention is not limited to this, and for example, apart from the wedge forming surface 10, the rotation direction P It is good also as what provides a discharge means and a supply means in the bearing pad adjacent on the front side P1. In each of the above embodiments, the spring material 21 is provided as an urging means for urging the oil supply member toward the thrust collar. However, the present invention is not limited to this. For example, the spring member 21 is urged by hydraulic pressure. Various means can be applied.

It is a front sectional view showing an outline of a steam turbine as an example of a rotary machine to which the present invention is applied. 1 is a perspective view of a thrust bearing device according to a first embodiment of the present invention. 1 is a side view of a thrust bearing device according to a first embodiment of the present invention. FIG. 3 is a partial perspective view showing details of a bearing pad and an oil supply member in the thrust bearing device according to the first embodiment of the present invention. It is a fragmentary sectional view showing details of a bearing pad and an oil supply member in a thrust bearing device of a 1st embodiment of the present invention. It is a perspective view of the thrust bearing apparatus of 2nd Embodiment of this invention. It is a fragmentary perspective view which shows the detail of a bearing pad and an oil supply member in the thrust bearing apparatus of 2nd Embodiment of this invention. It is a fragmentary sectional view which shows the detail of a bearing pad and an oil supply member in the thrust bearing apparatus of 2nd Embodiment of this invention.

Explanation of symbols

1, 30 Thrust bearing device (bearing device)
DESCRIPTION OF SYMBOLS 2 Bearing housing 3 Bearing pad 4, 31 Oil supply member 10 Wedge formation surface 11 Supply means 12 Discharge means 15 Protective layer 19 Control part 21 Spring material (biasing means)
100 Steam turbine (rotary machine)
105 Rotating shaft 107 Thrust collar

Claims (6)

A bearing housing that is axially opposed to a thrust collar provided on the rotating shaft and is supplied with lubricating oil between the thrust collar;
Between the bearing housing and the thrust collar, a plurality of bearing pads are arranged so as to be spaced apart from each other along the circumferential direction of the rotating shaft, and rotatably support the thrust collar;
An oil supply member that is provided close to the thrust collar at an interval between the bearing pads and that supplies the lubricating oil;
The oil supply member is provided on the rear side in the rotation direction of the thrust collar, and a wedge forming surface that generates a wedge effect due to the lubricating oil between the thrust collar and the thrust collar;
A supply means for supplying the lubricating oil provided on the front side in the rotational direction from the wedge forming surface;
A bearing device provided between the wedge forming surface and the supply means, and having a discharge means for discharging the lubricating oil. The bearing device according to claim 1,
The oil supply member is provided so as to be able to advance and retract toward the thrust collar,
A bearing device comprising urging means for urging the oil supply member toward the thrust collar. The bearing device according to claim 2,
The bearing device characterized in that the axial rigidity of the biasing means is set smaller than the axial rigidity of the bearing pad. In the bearing device according to claim 2 or 3,
A bearing device comprising a restricting portion capable of restricting movement of the oil supply member toward the thrust collar. In the bearing device according to any one of claims 1 to 4,
A bearing device characterized in that a protective layer that is easy to fit and hard to seize is formed on at least a surface of the oil supply member that is closest to the thrust collar.   A rotating machine that supports the rotating shaft by the bearing device according to any one of claims 1 to 5.

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