JP2007248305A - Thrust support function evaluation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thrust support function evaluation device capable of evaluating a thrust pad in the state similar to an actual machine. <P>SOLUTION: This thrust support function evaluation device 21 capable of evaluating a function of the thrust support 11 is equipped with a driving shaft 22 having an eccentric part 30 on the tip; the first fixing member 24 for fixing the first bearing ring 12a between the first and second bearing rings 12a, 12b included in the thrust support 11; a turning plate 23 provided on a position facing to the first fixing member 24, and performing eccentric rotational motion together with the second bearing ring 12b between the first and second bearing rings 12a, 12b by being mounted on the eccentric part 30; and a thrust load loading means 26 for loading a thrust load onto the thrust pad 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a thrust receiving function evaluation device, and more particularly to a thrust receiving function evaluation device for evaluating the eccentric rotation performance and the like of a thrust receiving used in a scroll compressor or the like.

  A scroll compressor of a domestic water heater is a combination of an orbiting scroll and a fixed scroll, and the orbiting scroll performs an orbiting motion to perform suction and compression. Here, the operating principle of the scroll compressor will be briefly described. 6A to 6D are diagrams showing an outline of the operating principle of the scroll compressor. First, referring to FIG. 6A, a scroll compressor 101 includes a swirl-shaped orbiting scroll 102, a similar swirl-shaped fixed scroll 103, and a compressed refrigerant gas discharge portion positioned at the center of each swirl-shape. 105. The fixed scroll 103 is fixed to other members and cannot perform a revolving motion. The orbiting scroll 102 cannot rotate but can be revolved. By the revolving motion of the orbiting scroll 102, the suction ports 106a and 106b generated between the orbiting scroll 102 and the fixed scroll 103 are opened, and the refrigerant gas is sucked into the compression chambers 104a and 104b. When the orbiting scroll 102 revolves in the order of FIG. 6B, FIG. 6C, and FIG. 6D and turns, the volume of the compression chambers 104a and 104b gradually decreases, and the inside of the compression chambers 104a and 104b The refrigerant gas sucked in is compressed and discharged from the discharge unit 105.

  In a scroll compressor having such a structure, that is, a scroll compressor in which the fixed scroll 103 is fixed and the orbiting scroll 102 performs an eccentric rotational motion, it is necessary to receive an eccentric thrust load generated between them. A thrust receiver that receives such an eccentric thrust load is disclosed in Japanese Patent Application Laid-Open No. 2000-186680 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2002-242857 (Patent Document 2).

  According to Patent Document 1 and Patent Document 2, the rolling shaft centers of the roller bearings are arranged in two rows in the vertical direction while changing their directions in directions perpendicular to each other to receive a thrust load due to eccentric rotational motion. FIG. 7 is an exploded perspective view showing the basic structure of the thrust receiver in this case. FIG. 8 is a cross-sectional view showing a part of the thrust receiver in this case. 7 and 8, thrust receiver 111 includes a pair of race rings 112a and 112b and an intermediate ring 113 disposed between race rings 112a and 112b. A first roller 114a is disposed between the raceway ring 112a and the intermediate ring 113, and is held by a cage 115a so as to have a rolling axis in the vertical direction (up and down direction on the paper surface) in FIG. . Further, a second roller 114b is disposed between the raceway ring 112b and the intermediate wheel 113, and is held by the cage 115b so as to have a rolling axis in the lateral direction (left and right direction in the drawing) in FIG. ing. That is, the rolling axes of the first roller 114a and the second roller 114b are arranged in directions perpendicular to each other. With this configuration, the thrust receiver 111 receives a thrust load due to an eccentric rotational motion.

Here, in Japanese Patent Laid-Open No. 2003-120664 (Patent Document 3), in order to evaluate the rotational performance of a thrust bearing that receives a thrust load, an eccentric thrust load is applied to the thrust bearing, thereby reducing the rotational performance of the thrust bearing. A test device for evaluation is disclosed.
Japanese Unexamined Patent Publication No. 2000-186680 (paragraph numbers 0019 to 0021, FIG. 3) JP 2002-242857 A (paragraph number 0029, FIG. 5) JP 2003-120664 A (paragraph numbers 0008 to 0014, FIGS. 1 and 2)

  In order to evaluate the eccentric rotation performance of the thrust receiver 111 described above, it is necessary to perform evaluation using an evaluation device. Conventionally, there is a test apparatus that evaluates a thrust bearing that receives a thrust load. However, such a test apparatus cannot load an eccentric thrust load, and as shown in FIG. Since the disposed thrust bearing 116 is the object of evaluation, the configuration is different from the thrust receiver 111 described above, and it cannot be evaluated.

  In the test apparatus shown in Patent Document 3, an eccentric thrust load can be applied. In this case as well, a thrust bearing having a configuration different from that of the thrust receiver 111 is an evaluation target. Furthermore, out of the pair of raceways included in the thrust receiver 111, one raceway can be eccentrically rotated and the other raceway cannot be fixed. I can't do it.

  An object of the present invention is to provide a thrust receiving function evaluation apparatus capable of evaluating a thrust receiver in a state close to an actual machine.

  The thrust receiving function evaluation device according to the present invention evaluates a thrust receiving member that is interposed between a first member and a second member that perform an eccentric rotational motion between them and supports a thrust load. The thrust receiving function evaluation device includes a first race ring fixed to the first member, a second race ring fixed to the second member, a first race ring, and a second race ring. An intermediate ring disposed between the first ring and a plurality of first rollers disposed between the first track ring and the intermediate ring, and the first roller for holding the rolling axes parallel to each other. A first cage having a plurality of pockets, a plurality of second rollers disposed between the second race ring and the intermediate ring, and the second rollers so that their rolling axes are parallel to each other A second cage having a plurality of pockets for holding, the rolling axis of the first roller and the rolling axis of the second roller are orthogonal, and from the first member A first guide pin extending through the first track ring and the first cage to the intermediate ring, and from the second member to the second track ring and the second A second guide pin extending through the cage to the intermediate ring, the first guide pin extending in a direction perpendicular to the rolling axis of the first roller, The second guide pin is movable within the restricted range, and the second guide pin is movable within the restricted range of the second cage and the intermediate wheel in a direction perpendicular to the rolling axis of the second roller. Evaluate the thrust receiver. Here, the thrust receiving function evaluation device is provided at a position facing the drive shaft having an eccentric portion at the tip, a first fixing member for fixing the first raceway ring, and the first fixing member. And a thrust plate that performs an eccentric rotational motion together with the second raceway ring, and a thrust load loading means that applies a thrust load to the thrust receiver, the function of the thrust receiver can be evaluated.

  By comprising in this way, among the 1st and 2nd track rings included in a thrust receiver, the 2nd track ring performs eccentric rotation motion with a turning plate, and the 1st track ring is the 1st track ring It is fixed to the fixing member. Specifically, by rotating a drive shaft having an eccentric portion at the tip, only the revolving motion excluding the rotational motion can be transmitted to the turning plate and the second race. Here, a thrust load is applied to the thrust receiver by the thrust load loading means. Such an evaluation condition is close to the condition used in the scroll compressor described above. Therefore, by using such a thrust receiving function evaluation apparatus, it is possible to evaluate the thrust receiver in a state close to an actual machine.

  Preferably, one of a radial bearing, a pair of ball bearing races, an eccentric thrust ball bearing that includes a ball disposed between the pair of ball bearing races and receives an eccentric thrust load, and a pair of ball bearing races And a second fixing member for fixing the ball bearing raceway. The radial bearing is provided between the eccentric part and the swivel plate. A second bearing ring is disposed on one surface of the swivel plate, and the other ball bearing race ring that performs eccentric rotational movement with the swivel plate is disposed on the other surface of the swirl plate. .

  By comprising in this way, through the radial bearing provided between the outer-diameter part of the eccentric part, and a turning plate, the 2nd bearing ring arrange | positioned at this and a ball bearing bearing ring of the other In addition, only revolving motion excluding rotational motion can be transmitted. Therefore, the thrust receiver can be evaluated more appropriately.

  More preferably, the thrust receiver is disposed on the drive shaft side with the swivel plate interposed therebetween, and the eccentric thrust ball bearing is disposed on the thrust load load means side. By doing so, a thrust load can be appropriately applied to the thrust receiver.

  More preferably, the thrust load loading means includes a load point for loading the thrust load at a position eccentric from the central axis of the drive shaft. By doing so, the thrust load can be applied to an eccentric position with respect to the thrust receiver, so that the state closer to the actual machine is obtained.

  More preferably, the thrust load loading means includes a spherical protrusion at a position eccentric from the rotation center axis of the drive shaft. By carrying out like this, a thrust load can be applied to the eccentric position appropriately.

  More preferably, a concave portion that is recessed in the axial direction is provided at a position that is decentered from the rotation center axis of the drive shaft, and the concave portion is provided with a load-loading ball that is centered on the central axis of the concave portion. The shaped protrusion is a part of a load-bearing ball provided in the recess. With this configuration, it is possible to easily apply a thrust load to an eccentric position.

  More preferably, the thrust receiving function evaluation apparatus can be evaluated with low viscosity oil by approximating lean lubrication in a refrigerant atmosphere. More preferably, for example, white kerosene and PAG (polyalkylene glycol) oil It can be evaluated using a lubricant containing The thrust receiving function evaluation device includes a seal having resistance to white kerosene and PAG oil. The material of the seal is, for example, tetrafluoroethylene resin or hydrogenated nitrile rubber.

  According to the present invention, of the first and second race rings included in the thrust receiver, the second race ring performs an eccentric rotational motion together with the turning plate, and the first race ring is the first fixed member. Fixed to. Specifically, by rotating a drive shaft having an eccentric portion at the tip, only the revolving motion excluding the rotational motion can be transmitted to the turning plate and the second race. Here, a thrust load is applied to the thrust receiver by the thrust load loading means. Such an evaluation condition is close to the condition used in the scroll compressor described above.

  As a result, it is possible to provide a thrust receiving function evaluation device that can evaluate the thrust receiving in a state close to an actual machine.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is an exploded perspective view showing the thrust receiver evaluated by the thrust receiver function evaluating apparatus according to one embodiment of the present invention. Referring to FIG. 2, the thrust receiver 11 is interposed between a housing 20a as a first member and a rotating member 20b as a second member that performs an eccentric rotational movement with respect to the housing 20a. And a thrust load generated between the rotating member 20b and the rotating member 20b.

  The thrust receiver 11 is a flat annular member having a raceway surface on one side, a first race ring 12a having a surface opposite to the raceway surface attached to the housing 20a, and a flat annular member. A second race ring 12b having a raceway surface on one side and a surface opposite to the raceway surface attached to the rotating member 20b, and an intermediate ring 13 which is a flat plate-like annular member and has raceway surfaces on both sides thereof. Prepare. The first raceway ring 12a and the second raceway ring 12b are arranged so that the raceway surfaces face each other. The intermediate ring 13 includes a first raceway ring 12a and a second raceway ring 12b so that both raceway faces the raceway face of the first raceway ring 12a and the raceway face of the second raceway ring 12b. It is arranged between.

  The thrust receiver 11 is disposed between the first race ring 12a and the intermediate ring 13, and includes a plurality of first rollers 14a that contact the raceway surfaces of the first race ring 12a and the intermediate ring 13, and a second race track. A plurality of second rollers 14b disposed between the wheel 12b and the intermediate wheel 13 and in contact with the second raceway ring 12b and the raceway surface of the intermediate wheel 13 are provided. The first roller 14a rolls on the raceway surface of the first raceway ring 12a and the raceway surface of the intermediate ring 13 that are arranged in the vertical direction. The second roller 14 b rolls on the raceway surface of the second race ring 12 b and the raceway surface of the intermediate ring 13 that are arranged in the vertical direction.

  The thrust receiver 11 is a flat annular member that holds a plurality of first rollers 14a, and a first retainer 15a that holds a plurality of first rollers 14a, and a flat annular member that holds a plurality of second rollers 14b. A second cage 15b. The plurality of first rollers 14a are held so as to be parallel to each other by the first cage 15a so that their rolling axes are aligned and directed in the direction of arrow A. Similarly, the second roller 14b is held so as to be parallel to each other by the second cage 15b so that its rolling axis is aligned and oriented in the direction of arrow B perpendicular to the direction of arrow A. ing. The first cage 15a is provided with roller stoppers (not shown) on the intermediate wheel 13 side and the first track ring 12a side in order to prevent the first roller 14a held in the pocket from dropping off. Yes. Similarly, with respect to the second cage 15b, in order to prevent the second roller 14b held in the pocket from falling off, roller stoppers (not shown) are provided on the intermediate wheel 13 side and the second race ring 12b side. Is provided.

  The first race 12a is provided with a pair of round holes 17a at positions facing each other at intervals of 180 degrees, and the intermediate ring 13 and the first cage 15a are opposed to each other at intervals of 180 degrees. In addition, a pair of long holes 18a and 19a are provided so that the longitudinal directions are aligned. The pair of long holes 18a and 19a extend in the radial direction, and allow their own movement in a direction orthogonal to the rolling axis direction (direction of arrow A) of the first roller 14a. 19a <18a.

  The thrust receiver 11 includes a pair of first guide pins 16a so as to extend from the housing 20a through the first raceway ring 12a and the first retainer 15a to the intermediate wheel 13. By inserting the pair of first guide pins 16a through the round holes 17a and the long holes 18a and 19a, the circumferential direction of each member is positioned, and the first race 12a is fixed to the housing 20a. Further, the intermediate wheel 13 and the first cage 15a are within the allowable range of the long holes 18a and 19a, in the direction orthogonal to the rolling axis direction of the first roller 14a, that is, in the direction of the arrow B or vice versa. It can move in the direction.

  Similarly, the second track ring 12b is provided with a pair of round holes 17b at positions facing each other at intervals of 180 degrees, and the intermediate ring 13 and the second cage 15b are spaced at intervals of 180 degrees. A pair of long holes 18b and 19b are provided so as to face each other and align the longitudinal direction. Note that the pair of long holes 18a and 18b provided in the intermediate wheel 13 are provided at intervals of 90 degrees. The pair of long holes 18b and 19b extends in the radial direction, and allows their own movement in a direction perpendicular to the rolling axis direction (direction of arrow B) of the second roller 14b. 19b <18b.

  The thrust receiver 11 includes a pair of second guide pins 16b so as to extend from the rotating member 20b through the second race ring 12b and the second cage 15b to the intermediate wheel 13. By inserting the pair of second guide pins 16b through the round holes 17b and the long holes 18b and 19b, the circumferential direction of each member is positioned, and the second race ring 12b is fixed to the rotating member 20b. The intermediate wheel 13 and the second cage 15b are within the allowable range of the long holes 18b and 19b, in the direction orthogonal to the rolling axis direction of the second roller 14b, that is, in the direction of arrow A or the opposite direction. It is movable.

  With such a configuration, even when the rotating member 20b performs an eccentric rotational movement in a state where the housing 20a is fixed, the first retainer 15a, the second retainer 15b, and the intermediate wheel 13 are indicated by the arrows A and B. And the reverse movement of the first roller 14a and the second roller 14b rolls, so that the thrust receiver 11 has an eccentric thrust between the rotating member 20b and the housing 20a. The load can be supported.

  Next, a thrust receiving function evaluation apparatus for evaluating the eccentric rotation performance of the thrust receiver 11 will be described. FIG. 1 is a schematic diagram showing the configuration of the thrust receiving function evaluation device 21. Referring to FIGS. 1 and 2, the thrust receiving function evaluation device 21 includes a drive shaft 22 having an eccentric portion 30 at the tip, and first and second race rings 12 a and 12 b included in the thrust receiver 11. A first fixing member 24 that fixes the first race ring 12a, and a position that faces the first fixing member 24, is attached to the eccentric portion 30, and performs an eccentric rotational motion together with the second race ring 12b. A swivel plate 23 to be performed, a thrust load loading means 26 for applying an eccentric thrust load to the thrust receiver 11, and an eccentric thrust ball bearing 29 for receiving the eccentric thrust load are provided. The eccentric thrust ball bearing 29 includes a pair of ball bearing races 41 a and 41 b and a ball 42. The thrust receiving function evaluation device 21 includes a second fixing member 25 that fixes one of the ball bearing races 41 a and 41 b included in the eccentric thrust ball bearing 29.

  As described above, the thrust receiver 11 is arranged and attached such that the housing 20a described above is the first fixing member 24 and the rotating member 20b is the swivel plate 23. Specifically, the first race 12a is fixed to the first fixing member 24 by a pair of first guide pins 16a. The second race 12b is attached to the turning plate 23 by a pair of second guide pins 16b.

  Of the pair of ball bearing raceways 41a and 41b included in the eccentric thrust ball bearing 29, the other ball bearing raceway 41b is mounted on the turning plate 23, and one ball bearing raceway 41a is a second fixing member. 25. The position where the other ball bearing race 41b is mounted is opposite to the position where the one bearing ring of the thrust receiver 11 is mounted. That is, the second bearing ring 12 b is mounted on one surface of the turning plate 23, and the ball bearing bearing ring 41 b is mounted on the other surface of the turning plate 23. The thrust receiver 11 is disposed on the drive shaft 22 side with the swivel plate 23 interposed therebetween, and the eccentric thrust ball bearing 29 is disposed on the thrust load load means 26 side. By doing so, a thrust load can be appropriately applied to the thrust receiver 11 via the swivel plate 23.

  Here, the configuration of the eccentric thrust ball bearing 29 provided in the thrust receiving function evaluation device 21 will be described. FIG. 3 is a cross-sectional view showing a main part of the eccentric thrust ball bearing 29. FIG. 4 is a view of one ball bearing race 41a included in the eccentric thrust ball bearing 29 as seen from the axial direction. Referring to FIGS. 1, 2, 3, and 4, a ball 42 is provided on a surface of the ball bearing races 41 a and 41 b opposite to the surface attached to the turning plate 23 and the second fixing member 25. A plurality of ball bearing raceways 43a and 43b for rolling are formed on the same circumference. Each ball bearing raceway surface 43a, 43b is annular, and the ball 42 arranged on each ball bearing raceway surface 43a, 43b is caused to rotate by an eccentric rotational motion, and the pitch circle PCD (Pitch) of the ball bearing raceway surfaces 43a, 43b. Roll on Circle Diameter.

  Next, the operation of the thrust receiving function evaluation device 21 will be described. The drive shaft 22 is rotatable, and the rotation center shaft 34 of the drive shaft 22 and the rotation center shaft 33 of the eccentric portion 30 provided at the tip of the drive shaft 22 are eccentric by the dimension D. By the rotation of 22, the eccentric portion 30 performs an eccentric rotational motion. A radial bearing 27 is disposed between the eccentric portion 30 and the turning plate 23 and receives a radial load generated between the eccentric portion 30 and the turning plate 23. The positions of the first fixing member 24 and the second fixing member 25 in the radial direction and the circumferential direction are determined by the casing 28. Note that the diameter of the pitch circle PCD is equal to the eccentric amount D.

  By comprising in this way, only the revolution motion except rotational motion can be transmitted to the turning plate 23 and the 2nd track ring 12b with which this is mounted | worn. Specifically, by configuring as described above, the swivel plate 23 and the second plate disposed on the swivel plate 23 are arranged via a radial bearing 27 provided between the outer diameter portion of the eccentric portion 30 and the swivel plate 23. Only the revolving motion excluding the rotational motion can be transmitted to the raceway ring 12b and the ball bearing raceway ring 41b.

  The thrust load loading means 26 includes a load point for loading the thrust load at a position eccentric by the dimension C from the rotation center shaft 34 of the drive shaft 22. By applying a force in the direction of arrow E from this load point, an eccentric thrust load can be applied to the thrust receiver 11. A concave portion 32 that is recessed in the axial direction is provided on the upper side of the second fixing member 25. A load-loading ball 35 for loading a load is provided in the recess 32 so that the center, that is, the load point is located on the central axis 31 of the recess 32. The position of the recess 32 in the radial direction is provided such that the center axis 31 of the recess 32 is eccentric from the rotation center axis 34 by the dimension C. An eccentric thrust load can be applied to the thrust receiver 11 by applying a load in the direction of arrow E by the thrust load loading means 26 through the load load ball 35. Since the load-loading ball 35 has a spherical surface in part, by applying a load through the load-loading ball 35, a thrust load can be easily and appropriately applied to an eccentric position. it can. In this case, instead of the load-loading balls 35 and the recesses 32, spherical protrusions may be provided. This also makes it possible to apply a thrust load to an eccentric position appropriately.

  Here, the thrust receiving function evaluation device 21 can be approximated to lean lubrication in a refrigerant atmosphere and evaluated with low viscosity oil. For example, evaluation is performed using a lubricant containing white kerosene and PAG oil. be able to. The thrust receiving function evaluation device 21 includes a seal having resistance against white kerosene and PAG oil. The material of the seal is, for example, tetrafluoroethylene resin or hydrogenated nitrile rubber. By doing so, the thrust receiver 11 can be more appropriately evaluated.

  Using the thrust receiving function evaluation device 21 described above, a test for evaluating the wear amount of the raceway ring included in the thrust receiving 11 was performed. The bus bar shape curves 44a, 44b, and 44c of the bearing rings are shown in FIGS.

  Specific test conditions including dimension C and dimension D are as follows.

Thrust load: 1000 N (Load position: 12.5 mm from the center axis)
Rotation speed: 1500r / min (revolution radius 2.5mm)
Lubricant: PAG + white kerosene FIG. 5 (A) shows the bus bar shape curve 44a of the bearing ring of the thrust receiver provided in the actual machine, that is, the scroll compressor described above, and FIG. 5 (B) shows the thrust according to the present invention. Of the thrust receivers provided in the receiving function evaluation device, the bus bar shape curve 44b of the bearing ring attached to the first fixing member 24 side, FIG. 5C, is provided in the thrust receiving function evaluation device according to the present invention. Among the thrust receivers shown, a generatrix curve 44c of the race ring attached to the turning plate 23 side is shown.

  With reference to FIG. 5 (A), the raceway shape curve 44a of the bearing ring included in the thrust receiver provided in the actual machine is worn by about 3.0 μm. On the other hand, referring to FIG. 5B, the generatrix curve 44b of the bearing ring attached to the first fixing member 24 side is also worn by about 3.8 μm. In addition, referring to FIG. 5C, the bus bar shape curve 44c of the bearing ring attached to the turning plate 23 side is also worn by about 2.5 μm.

  As described above, the wear amount of the races is substantially the same. Therefore, the maximum wear amount of the race ring in the actual machine and the maximum wear amount of the race ring in the thrust receiving function evaluation device according to the present invention are substantially the same.

  As described above, by using the thrust receiving function evaluation apparatus, it is possible to perform a thrust receiving evaluation test in a state close to an actual machine.

  In the above-described embodiment, the radial bearing 27 is disposed and supported between the eccentric portion 30 and the turning plate 23. However, the present invention is not limited to this and may be supported by a slide bearing. . Further, the eccentric thrust ball bearing 29 is arranged and supported between the second fixing member 25 and the swivel plate 23. However, the present invention is not limited to this and may be supported by a slide bearing.

  In the above embodiment, the thrust receiver 11 is disposed between the first fixed member 24 and the swivel plate 23, and the eccentric thrust ball bearing 29 is disposed between the second fixed member 25 and the swivel plate 23. However, the present invention is not limited to this, and the thrust receiver 11 is disposed between the second fixing member 25 and the swiveling plate 23, and the eccentric thrust ball bearing 29 is disposed between the first fixing member 24 and the swiveling plate 23. You may decide to arrange between.

  In the above embodiment, the thrust load is applied to the position eccentric by the dimension C. However, the present invention is not limited to this, and the thrust load can be applied under the condition that the dimension C is 0 and the eccentricity is not applied. .

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  Since the thrust receiving function evaluation device according to the present invention can perform an evaluation test in a state close to an actual machine, it is effectively used when evaluating the eccentric rotation performance of the thrust receiver provided in the scroll compressor or the like.

It is the schematic of the thrust receiving function evaluation apparatus which concerns on one Embodiment of this invention. It is a disassembled perspective view which shows the thrust receiver evaluated by the thrust receiver function evaluation apparatus. It is sectional drawing which shows the principal part of the eccentric thrust ball bearing contained in a thrust receiving function evaluation apparatus. It is a figure which shows the ball bearing race provided in the eccentric thrust ball bearing contained in a thrust receiving function evaluation apparatus. It is a figure showing the amount of wear of the bearing ring contained in the thrust receiver tested by the thrust receiver function evaluation apparatus, (A) Bus-bar shape curve of the bearing ring provided in the thrust receiver in an actual machine, (B) Thrust receiver function evaluation apparatus Among the thrust receivers to which an eccentric thrust load is applied by the above, the generatrix curve of the bearing ring attached to the first fixing member side, (C) the thrust receiver to which the eccentric thrust load is applied by the thrust receiver function evaluation device It is a figure which shows the bus-line shape curve of the bearing ring attached to the turning plate. It is the schematic which shows the operating principle of a scroll type compressor. It is a disassembled perspective view showing the conventional thrust receiver. It is sectional drawing which shows a part of conventional thrust receiver. It is the schematic which looked at the conventional thrust bearing from the axial direction.

Explanation of symbols

  11, 111 Thrust receiver, 12a First race ring, 12b Second race ring, 13, 113 Intermediate ring, 14a, 114a First roller, 14b, 114b Second roller, 15a First cage, 15b Second cage, 16a First guide pin, 16b Second guide pin, 17a, 17b Round hole, 18a, 18b, 19a, 19b Long hole, 20a Housing, 20b Rotating member, 21 Thrust receiving function evaluation device, 22 Drive shaft, 23 Rotating plate, 24 First fixing member, 25 Second fixing member, 26 Thrust load loading means, 27 Radial bearing, 28 Casing, 29 Eccentric thrust ball bearing, 30 Eccentric part, 31 Central shaft, 32 Recess, 33, 34 Rotation center shaft, 35 Load bearing ball, 41a, 41b Ball bearing race, 42 Ball, 43a, 43 Ball bearing raceway, 44a, 44b, 44c Busbar shape curve, 101 scroll compressor, 102 orbiting scroll, 103 fixed scroll, 104a, 104b compression chamber, 105 discharge part, 106a, 106b suction port, 112a, 112b raceway ring, 115a 115b Cage, 116 Thrust bearing, 117 rollers.

Claims (10)

A thrust receiver that supports a thrust load interposed between a first member and a second member that perform eccentric rotational movement between each other, and a first race ring fixed to the first member; A second bearing ring fixed to the second member, an intermediate wheel disposed between the first bearing ring and the second bearing ring, and a plurality of members disposed between the first bearing ring and the intermediate ring. Between the first roller, the first cage having a plurality of pockets for holding the first roller so that the rolling axes are parallel to each other, and the second raceway ring and the intermediate ring A plurality of second rollers arranged, and a second cage having a plurality of pockets for holding the second rollers so that their rolling axes are parallel to each other, The rolling axis and the rolling axis of the second roller are orthogonal to each other, and the first member passes through the first track ring and the first cage to reach the intermediate ring. A first guide pin extending, and a second guide pin extending from the second member through the second race and the second cage to the intermediate ring, the first guide The pin is movable in the direction perpendicular to the rolling axis of the first roller within the restricted range of the first cage and intermediate wheel, and the second guide pin is perpendicular to the rolling axis of the second roller. In a thrust receiving function evaluation device for evaluating a thrust receiver, characterized in that it is movable in the direction within the restricted range of the second cage and the intermediate wheel,
A drive shaft having an eccentric portion at a tip; a first fixing member that fixes the first raceway ring; and a position that faces the first fixing member. A thrust receiving function evaluation device comprising: a turning plate that performs an eccentric rotational movement together with the second race ring; and a thrust load loading means that applies a thrust load to the thrust receiving, and the function of the thrust receiving can be evaluated. A radial bearing, a pair of ball bearing races, an eccentric thrust ball bearing that includes a ball disposed between the pair of ball bearing races and receives an eccentric thrust load, and one of the pair of ball bearing races A second fixing member for fixing the ball bearing raceway, wherein the radial bearing is provided between the eccentric portion and the pivot plate, and the second race ring is provided on one surface of the pivot plate. The other ball bearing race of the pair of ball bearing races is arranged on the other surface of the swivel plate. Thrust receiving function evaluation device. The thrust receiver function evaluation apparatus according to claim 2, wherein the thrust receiver is disposed on the drive shaft side and the eccentric thrust ball bearing is disposed on the thrust load load means side with the swivel plate interposed therebetween. The thrust receiving function evaluation device according to any one of claims 1 to 3, wherein the thrust load loading means includes a load point for applying a thrust load at a position eccentric from a central axis of the drive shaft. The thrust receiving function evaluation device according to claim 4, wherein the thrust load loading means includes a spherical protrusion at a position eccentric from a rotation center axis of the drive shaft. A concave portion that is recessed in the axial direction is provided at a position that is eccentric from the rotation center axis of the drive shaft, and the concave portion is provided with a load-loading ball that is centered on the central axis of the concave portion, and the spherical surface The thrust receiving function evaluation device according to claim 5, wherein the protruding portion is a part of a load-bearing ball provided in the recess. The thrust receiving function evaluation apparatus according to any one of claims 1 to 6, wherein the thrust receiving function evaluation apparatus can be approximated to lean lubrication in a refrigerant atmosphere and evaluated with a low-viscosity oil. The thrust receiving function evaluation device according to claim 1, wherein the thrust receiving function evaluation device is evaluated using a lubricant containing white kerosene and PAG oil. The thrust receiving function evaluation device according to claim 8, comprising a seal having resistance against white kerosene and PAG oil. The thrust receiving function evaluation apparatus according to claim 9, wherein a material of the seal is tetrafluoroethylene resin or hydrogenated nitrile rubber.

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