JP2007263675A - Evaluation device for thrust bearing mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an evaluation device for a thrust bearing mechanism capable of evaluating precisely and efficiently the thrust bearing mechanism under the condition closely near to that of an actual machine. <P>SOLUTION: This evaluation device 21 for the thrust bearing mechanism is provided with the first and second fixed members 24, 25, a driving shaft 22 having an eccentric part 30 arranged between the first and second fixed members 24, 25, in its tip, a decentering bearing 23 mounted on the eccentric part 30, provided between the first and second fixed members 24, 25, including a protrusion 45 extended radially, and for performing an eccentric motion to the first and second fixed members 24, 25, and a thrust load loading means 26 for loading a thrust load onto the first and second thrust bearing mechanisms 11a, 11b. The first thrust bearing mechanism 11a is arranged to mount the first fixed bearing ring on the first fixed member 24. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a thrust receiving mechanism evaluation device, and more particularly to a thrust receiving mechanism evaluation device for evaluating the eccentric rotation performance and the like of a thrust receiving mechanism used in a scroll compressor and 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. 8A to 8D are diagrams showing an outline of the operating principle of the scroll compressor. First, referring to FIG. 8A, a scroll compressor 101 includes a swirl-shaped orbiting scroll 102, a similar swirl-shaped fixed scroll 103, and a discharge portion for compressed refrigerant gas located 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. 8B, FIG. 8C, and FIG. 8D 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 receiving mechanism 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 an eccentric thrust load. FIG. 9 is an exploded perspective view showing the basic structure of the thrust receiving mechanism in this case. FIG. 10 is a cross-sectional view showing a part of the thrust receiving mechanism in this case. Referring to FIGS. 9 and 10, thrust receiving mechanism 111 includes a pair of track rings 112a and 112b, and an intermediate wheel 113 disposed between the pair of track rings 112a and 112b. A first roller 114a is disposed between the one raceway ring 112a and the intermediate ring 113, and the first cage 115a has a rolling axis in the vertical direction (up and down direction in the drawing) in FIG. Is held by. Further, a second roller 114b is disposed between the other race ring 112b and the intermediate ring 113, and the second holding is performed so as to have a rolling axis in the lateral direction (left and right direction in the drawing) in FIG. Held by the vessel 115b. 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 receiving mechanism 111 receives an eccentric thrust load.

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, whereby the rotational performance of the thrust bearing is reduced. 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 receiving mechanism 111 described above, it is necessary to evaluate using the evaluation device. Conventionally, there is a test apparatus that evaluates a thrust bearing that receives a thrust load. As shown in FIG. 11, a thrust bearing 116 in which rollers 117 are radially arranged is an evaluation object. Since such a test apparatus cannot fix an eccentric thrust load by fixing one of the race rings and eccentrically rotating the other race ring, it cannot be evaluated under conditions close to those of an actual machine.

  Moreover, although the test apparatus shown in Patent Document 3 can load an eccentric thrust load, as in the above-described test apparatus, one of the race rings is fixed and the other race ring is eccentrically rotated. Because it is not possible, the evaluation conditions will be different from the actual machine.

  In particular, in order to increase the evaluation accuracy of the thrust receiving mechanism having the above-described configuration, it is necessary to appropriately eccentrically rotate one of the race rings included in the thrust receiving mechanism.

  Furthermore, it is efficient if a plurality of thrust receiving mechanisms can be evaluated at one time.

  An object of the present invention is to provide a thrust receiving mechanism evaluation device that can accurately and efficiently evaluate a thrust receiving mechanism in a state close to an actual machine.

  A thrust receiving mechanism evaluation device according to the present invention includes first and second thrust receiving mechanisms that are interposed between a first member that performs an eccentric rotational motion and a second member to support a thrust load. Evaluate at once. Further, the thrust receiving mechanism evaluation device includes a fixed raceway fixed to the first member, a turning raceway fixed to the second member, an intermediate wheel disposed between the fixed raceway and the turning raceway, A fixed track ring having a plurality of fixed track ring side rollers arranged between the fixed track ring and the intermediate ring, and a plurality of pockets for holding the fixed track ring side rollers so that their rolling axes are parallel to each other. Side cage, a plurality of swiveling raceway side rollers arranged between the swiveling raceway ring and the intermediate ring, and a plurality of pockets for holding the turning raceway side rollers so that their rolling axes are parallel to each other A rolling bearing ring-side cage having the rolling shaft of the fixed bearing ring side roller and the rolling shaft of the turning race ring side roller orthogonal to each other, and the first member to the fixed bearing ring and A fixed bearing ring side guide pin that extends through the fixed bearing ring retainer to the intermediate ring, And a turning race ring side guide pin extending from the second member to the intermediate race through the turning race ring and the turning race ring side cage, and the fixed race ring side guide pin is fixed to the fixed race ring side roller. In the direction perpendicular to the rolling axis of the fixed bearing ring side cage and the intermediate wheel, and in the direction perpendicular to the rolling axis of the turning race ring side roller, The first and second thrust receiving mechanisms characterized by being movable within the restricted range of the turning race wheel side cage and the intermediate wheel are evaluated at a time. The thrust receiving mechanism evaluation device includes: a first and second fixing member; a drive shaft having an eccentric portion disposed between the first and second fixing members at a tip; and the first and second fixing members. A swiveling member that is provided between the second fixing members and includes a projecting portion extending in the radial direction and that performs eccentric rotational movement with respect to the first and second fixing members; And a thrust load load means for applying a thrust force to the first and second thrust receiving mechanisms. The first thrust receiving mechanism is arranged by mounting the first fixed raceway included in the first thrust receiving mechanism on the first fixing member. The second thrust receiving mechanism is configured such that the second fixed raceway included in the second thrust receiver is attached to the second fixing member, and the second turning raceway included in the second thrust receiver is It is fixedly arranged on the first turning raceway wheel included in one thrust receiving mechanism. Here, the radial end surface of the protrusion is in rolling contact with the inner diameter surface of the first or second turning race.

  The first and second turning race wheels receive a force from the projecting portion that makes rolling contact, and perform an eccentric rotational motion together with the eccentric portion. The first fixed race is fixed by a first fixing member. The second fixed race is fixed by a second fixing member. A thrust load is applied to the first and second thrust receiving mechanisms by the thrust load loading means. Such an evaluation condition is close to the condition used in the scroll compressor described above.

  In this case, since the first and second turning raceways are fixed, the degree of coaxiality between the eccentric rotation shaft of the first thrust receiving mechanism and the eccentric rotation shaft of the second thrust receiving mechanism can be increased. it can. Then, since the first and second turning races can be more appropriately eccentrically rotated, the first and second thrust receiving mechanisms can be evaluated with high accuracy.

  Furthermore, the first and second thrust receiving mechanisms can be evaluated at a time, which is efficient.

  Therefore, by using such a thrust receiving mechanism evaluation apparatus, it is possible to evaluate the thrust receiving mechanism with high accuracy and efficiency in a state close to an actual machine.

  Preferably, the first and second turning raceway rings include a first turning raceway side guide pin included in the first thrust receiving mechanism or a second turning raceway side guide included in the second thrust receiving mechanism. Fixed by pins. By doing so, the respective orbiting rings can be easily fixed by the orbiting ring side guide pins included in the first or second thrust receiving mechanism.

  More preferably, the turning member is an eccentric bearing including an outer ring and a plurality of rollers, and a protrusion is provided on the outer peripheral surface of the outer ring. By doing so, the eccentric bearings can smoothly rotate each other orbiting ring eccentrically, so that the evaluation accuracy can be further improved.

  More preferably, the first and second turning raceways are also used. By doing so, the trouble of fixing the first and second turning race rings can be saved, and one of the turning race rings included in the first or second thrust receiving mechanism can be omitted. Therefore, the thrust receiving mechanism can be evaluated more efficiently.

  More preferably, the thickness of the protrusion is equal to or less than the axial thickness of the fixed first and second turning raceways. Along with the eccentric rotational movement of the eccentric portion, the first and second turning race wheel side cages also perform the eccentric rotational movement. Here, the turning race ring side cage may be located on the inner diameter side of the turning race ring, and there is a possibility of interference with the protrusion. However, by comprising in this way, interference with a turning track | orbit ring side holder | retainer and a protrusion can be prevented.

  More preferably, the surface of the protrusion that faces the first fixing member is the surface that faces the second fixing member of the first orbiting ring side cage included in the first thrust receiving mechanism. Than the second fixed member side, and the surface of the protrusion that faces the second fixed member is the second of the second orbiting ring side cage included in the second thrust receiving mechanism. It arrange | positions rather than the surface which opposes one fixing member at the 1st fixing member side. Also by doing so, it is possible to prevent interference between the turning race wheel side cage included in the first and second thrust receiving mechanisms and the protrusion.

  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 the eccentric position with respect to the first and second thrust receiving mechanisms, so that the evaluation condition can be made closer to that of the actual machine.

  According to this invention, the 1st and 2nd turning raceway ring receives force from the protrusion part which carries out rolling contact, and performs eccentric rotational motion with an eccentric part. The first fixed race is fixed by a first fixing member. The second fixed race is fixed by a second fixing member. A thrust load is applied to the first and second thrust receiving mechanisms by the thrust load loading means. Such an evaluation condition is close to the condition used in the scroll compressor described above.

  In this case, since the first and second turning raceways are fixed, the degree of coaxiality between the eccentric rotation shaft of the first thrust receiving mechanism and the eccentric rotation shaft of the second thrust receiving mechanism can be increased. it can. Then, since the first and second turning races can be more appropriately eccentrically rotated, the first and second thrust receiving mechanisms can be evaluated with high accuracy.

  Furthermore, the first and second thrust receiving mechanisms can be evaluated at a time, which is efficient.

  As a result, it is possible to provide a thrust receiving mechanism evaluation device that can accurately and efficiently evaluate the thrust receiving mechanism 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 first thrust receiving mechanism among the first and second thrust receiving mechanisms evaluated by the thrust receiving mechanism evaluation apparatus according to the embodiment of the present invention. Referring to FIG. 2, the first thrust receiving mechanism 11a is interposed between a housing 20a as a first member and a rotating member 20b as a second member that performs eccentric rotational movement with respect to the housing 20a. Thus, the thrust load generated between the housing 20a and the rotating member 20b is supported.

  The first thrust receiving mechanism 11a is a flat plate-like annular member having a raceway surface on one side, and a first stationary race ring 12a having a surface opposite to the raceway surface attached to the housing 20a, and a flat plate-like member. An annular member having a raceway surface on one side and a surface opposite to the raceway surface being attached to the rotating member 20b, a first turning raceway ring 12b, and a plate-like annular member having raceway surfaces on both sides thereof. And a first intermediate wheel 13a. The first fixed raceway ring 12a and the first turning raceway ring 12b are arranged so that the raceway surfaces face each other. The first intermediate ring 13a has the first fixed raceway 12a and the first intermediate raceway 13a so that both raceway surfaces face the raceway surface of the first fixed raceway ring 12a and the raceway surface of the first turning raceway ring 12b. It arrange | positions between one turning track ring 12b.

  The first thrust receiving mechanism 11a is disposed between the first fixed raceway ring 12a and the first intermediate ring 13a, and is in contact with the raceway surfaces of the first fixed raceway ring 12a and the first intermediate ring 13a. Of the first fixed race ring side roller 14a, the first turning race ring 12b and the first intermediate ring 13a, and the raceway surfaces of the first turning race ring 12b and the first intermediate ring 13a. And a plurality of first orbiting ring-side rollers 14b that are in contact with each other. The first fixed bearing ring side roller 14a rolls on the raceway surface of the first fixed raceway ring 12a and the raceway surface of the first intermediate ring 13a arranged in the vertical direction. The first turning race ring side roller 14b rolls on the raceway surface of the first turning raceway ring 12b and the raceway surface of the first intermediate ring 13a arranged in the vertical direction.

  The first thrust receiving mechanism 11a is a flat annular member, which is a first fixed race ring side cage 15a that holds a plurality of first fixed race ring side rollers 14a, and a flat annular member. And a first turning race ring side cage 15b for holding a plurality of first turning race ring side rollers 14b. The plurality of first fixed race ring side rollers 14a are held so as to be parallel to each other by the first fixed race ring side cage 15a so that their rolling axes are aligned in the direction of arrow A. ing. Similarly, the first turning race ring side roller 14b is moved by the first turning race ring side cage 15b so that its rolling axis is aligned with the direction of arrow B perpendicular to the direction of arrow A. They are held parallel to each other. The first fixed race ring side cage 15a has a first intermediate ring 13a side and a first fixed race ring 12a side to prevent the first fixed race ring side roller 14a held in the pocket from falling off. A roller stopper (not shown) is provided. Similarly, in order to prevent the first turning race ring side roller 14b held in the pocket from dropping off, the first turning race ring side cage 15b and the first turning race ring side cage 15b are also provided. A roller stopper (not shown) is provided on the 12b side.

  The first fixed race 12a is provided with a pair of first round holes 17a at positions facing each other at an interval of 180 degrees, and the first intermediate race 13a and the first fixed race ring side retainer. A pair of first long holes 18a and 19a are provided in 15a so as to face each other at intervals of 180 degrees and to be aligned in the longitudinal direction. The pair of first long holes 18a and 19a extend in the radial direction, and move their own movement in a direction orthogonal to the rolling axis direction (direction of arrow A) of the first fixed race ring side roller 14a. The dimensional relationship is 19a <18a.

  The first thrust receiving mechanism 11a is formed by a pair of first so as to extend from the housing 20a through the first fixed race ring 12a and the first fixed race ring side cage 15a to the first intermediate ring 13a. The fixed race ring side guide pin 16a is provided. By inserting the pair of first fixed race ring side guide pins 16a through the first round hole 17a and the first elongated holes 18a, 19a, the circumferential direction of each member is positioned and the first fixed The race 12a is fixed to the housing 20a. In addition, the first intermediate ring 13a and the first fixed race ring side cage 15a are within the allowable range of the first long holes 18a and 19a, and the rolling axis direction of the first fixed race ring side roller 14a. It can be moved in the orthogonal direction, that is, in the direction of arrow B or vice versa.

  Similarly, the first turning raceway ring 12b is provided with a pair of first round holes 17b at positions facing each other at intervals of 180 degrees, and the first intermediate wheel 13a and the first turning raceway ring are provided. The side cage 15b is provided with a pair of first long holes 18b and 19b so as to be opposed to each other at intervals of 180 degrees and to be aligned in the longitudinal direction. The pair of first long holes 18a and 18b provided in the first intermediate ring 13a are provided at an interval of 90 degrees. The pair of first long holes 18b and 19b extend in the radial direction, and move their own movement in a direction orthogonal to the rolling axis direction (direction of arrow B) of the first turning race wheel side roller 14b. The dimensional relationship is 19b <18b.

  The first thrust receiving mechanism 11a includes a pair of first thrust wheels extending from the rotating member 20b through the first turning raceway ring 12b and the first turning raceway side cage 15b to the first intermediate wheel 13a. One turning track ring side guide pin 16b is provided. By inserting the pair of first turning race ring side guide pins 16b through the first round hole 17b and the first elongated holes 18b, 19b, the circumferential direction of each member is positioned, and the first turning The track ring 12b is fixed to the rotating member 20b, and the first intermediate ring 13a and the first swing track ring side retainer 15b are within the allowable range of the first long holes 18b and 19b. It can move in the direction orthogonal to the rolling axis direction of the side rollers 14b, that is, in the direction of the arrow A or in the opposite direction.

  With such a configuration, even if the rotating member 20b performs an eccentric rotational movement in a state where the housing 20a is fixed, the first fixed race ring side cage 15a, the first turning race ring side cage 15b, and the second One intermediate wheel 13a is allowed to move in the directions of arrows A and B or vice versa, and the first fixed race ring side roller 14a and the first turning race ring side roller 14b roll. The first thrust receiving mechanism 11a can support an eccentric thrust load between the rotating member 20b and the housing 20a.

  Next, a thrust receiving mechanism evaluation device for evaluating the eccentric rotation performance of the first and second thrust receiving mechanisms 11a and 11b will be described. FIG. 1 is a schematic diagram showing the configuration of the thrust receiving mechanism evaluation device 21. FIG. 3 is an enlarged cross-sectional view of a portion indicated by III in the thrust receiving mechanism evaluation device 21 shown in FIG. Note that the second thrust receiving mechanism 11b evaluated by the thrust receiving mechanism evaluation apparatus is a second fixed raceway ring 12c, a second turning raceway ring 12d, and a second intermediate wheel with reference to FIG. 13b, a second fixed race ring side cage 15c, a second turning race ring side cage 15d, a second fixed race ring side roller 14c, and a second turning race ring side roller (not shown). ), A pair of second fixed raceway side guide pins (not shown), and a pair of second turning raceway side guide pins (not shown). Since it is the same structure as the one thrust receiving mechanism 11a, its description is omitted.

  With reference to FIGS. 1, 2 and 3, the thrust receiving mechanism evaluation device 21 is provided between the first and second fixing members 24, 25 and the first and second fixing members 24, 25 at the tip. A drive shaft 22 having an eccentric portion 30 disposed; and a projection 45 mounted on the eccentric portion 30 and provided between the first and second fixing members 24, 25 and extending in the radial direction. An eccentric bearing 23 as a turning member that performs an eccentric rotational movement with respect to the second fixing members 24 and 25, and a force in a direction toward the first fixing member 24 is applied to the second fixing member 25. The first and second thrust receiving mechanisms 11a and 11b are provided with thrust load loading means 26 for loading a thrust load.

  The eccentric portion 30 has its rotation center shaft 33 eccentric from the rotation center shaft 34 of the drive shaft 22 by a dimension C. The first and second fixing members 24 and 25 have their radial and circumferential positions defined by the casing 28. Here, the fixing member arranged on the first thrust receiving mechanism 11a side is referred to as the first fixing member 24, and the fixing member arranged on the second thrust receiving mechanism 11b side is referred to as the second fixing member 25. To do. In addition, of the first and second fixing members 24 and 25, the second fixing member 25 is disposed above the first fixing member 24.

  The first thrust receiving mechanism 11 a is arranged by mounting the first fixed raceway ring 12 a included in the first thrust receiving mechanism 11 a on the first fixing member 24. The second thrust receiving mechanism 11b has the second fixed raceway ring 12c included in the second thrust receiving mechanism 11b attached to the second fixing member 25, and the second thrust receiving mechanism 11b includes the second thrust receiving mechanism 11b. The turning raceway ring 12d is fixed to the first turning raceway ring 12b included in the first thrust receiving mechanism 11a. The first fixed race 12a is mounted on the first fixed member 24 located below the surface opposite to the raceway surface. In addition, the second fixed race 12c included in the second thrust receiving mechanism 11b is mounted on the second fixing member 25 located above the surface opposite to the raceway surface. When the first fixed member 24 and the first fixed track ring 12a and the second fixed member 25 and the second fixed track ring 12c are mounted, the first fixed track ring 12a is attached to the first fixed track ring 12a in a radial position. By providing two round holes (not shown) each at a position shifted by 90 degrees from the pair of provided round holes 17b, etc., and press-fitting guide pins (not shown) into the round holes, Each member is mounted.

  The first turning raceway ring 12b and the second turning raceway ring 12d are fixed so as to make rolling contact with surfaces opposite to each other's raceway surface. Here, when the first and second turning raceway rings 12b and 12d are fixed, the pair of first turning raceway side guide pins 16b included in the first thrust receiving mechanism 11a is used as the second thrust receiving mechanism. The bearing rings are fixed so that they are press-fitted into a pair of second round holes 17d provided in 11b and are inserted through the pair of second long holes 18d and 19d. In this case, the pair of first turning raceway side guide pins 16b are connected to the first turning raceway side cage 15b, the first turning from the first intermediate wheel 13a included in the first thrust receiving mechanism 11a. The bearing ring 12b, the second turning race ring 12d, and the second turning race ring side cage 15d pass through and extend to the second intermediate wheel 13b included in the second thrust receiving mechanism 11b. . By doing so, the first and second turning race rings 12b, 12d and the like can be positioned in the circumferential direction by the pair of first turning race ring side guide pins 16b, and the first and second turning race rings can be easily positioned. The turning raceways 12b and 12d can be fixed (see FIG. 3). In this case, the pair of second turning raceway side guide pins included in the second thrust receiving mechanism 11b can be omitted. In addition, the pair of second turning raceway side guide pins included in the second thrust receiving mechanism 11b is press-fitted into the pair of first round holes 17b provided in the first turning raceway ring 12b. The first and second turning raceways 12b and 12d may be fixed.

  The eccentric bearing 23 is provided between the first and second fixing members 24 and 25 and is attached to the eccentric portion 30 via the shaft portion 37 and the fixing portion 27. Here, the configuration of the eccentric bearing 23 provided in the thrust receiving mechanism evaluation device 21 will be described. FIG. 4A is a cross-sectional view of the eccentric bearing 23 in the axial direction. Referring to FIGS. 3 and 4A, eccentric bearing 23 includes an outer ring 41, a plurality of rollers 42, and a cage 43 that holds the plurality of rollers 42. The eccentric bearing 23 is arranged so that the rolling axis of the roller 42 faces the top and bottom. The eccentric bearing 23 is provided with a flange 44a and a side plate 44b for restricting axial movement of the rollers 42 and the cage 43, and the like. The flange 44a and the side plate 44b are attached so that the side surfaces 48a and 48b are in rolling contact with the width surfaces 47a and 47b of the outer ring 41. The rollers 42 and the cage 43 may be rollers with a cage incorporated in advance.

  Here, a protrusion 45 extending in the radial direction is provided on the outer diameter surface 46 of the outer ring 41. When the thrust receiving mechanism evaluation device 21 is provided with a protrusion amount of the protrusion 45 from the outer diameter surface 46, the radial end surface 49 of the protrusion 45 corresponds to the inner diameter surface 56 b of the first turning raceway ring 12 b and The amount of protrusion is in contact with the inner diameter surface 56d of the second turning raceway ring 12d. That is, when the thrust receiving mechanism evaluation device 21 is provided, the radial end surface 49 of the protrusion 45 is in contact with the inner diameter surfaces 56b and 56d of the first and second turning raceways 12b and 12d. Moreover, the shape of the protrusion 45 is a shape along the inner diameter surfaces 56b and 56d.

  As shown in FIG. 4B, the eccentric bearing 51 is a roller follower type having two rollers 53a and 53b arranged in the axial direction, that is, two rollers 53a and 53b arranged in the axial direction. It is good also as a structure where the protrusion 54 extended in radial direction was provided in the thick outer ring | wheel 52 in which No. was integrated.

  Returning to FIGS. 1, 2, and 3, the thrust load loading means 26 applies force to the second fixing member 25 in the direction of arrow E, that is, in the direction toward the first fixing member 24. . The thrust load loading means 26 includes a load point 36 for loading a thrust load at a position eccentric by a dimension D from the rotation center shaft 34 of the drive shaft 22. By applying a force in the direction of arrow E from the load point 36, a thrust load can be applied to the first and second thrust receiving mechanisms 11a and 11b at a position eccentric by a dimension D.

  On the upper side of the second fixing member 25 and on the side opposite to the side on which the second turning raceway ring 12d is mounted, a recess 32 is provided that is recessed in the axial direction and has a load point 36 at the lowest point. It has been. A load-loading ball 35 for loading a load is provided in the recess 32 so that the center is located on the central axis 31 of the recess 32 passing through the load point 36. 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 a dimension D. The thrust load loading means 26 applies a force to the second fixing member 25 in the direction toward the first fixing member 24 through the load-loading ball 35, thereby providing the first and second thrust receivers. An eccentric thrust load can be applied to the mechanisms 11a and 11b.

  Next, the operation of the thrust receiving mechanism evaluation device 21 configured as described above will be described. When the drive shaft 22 is rotated, the eccentric portion 30 rotates eccentrically by the dimension C from the rotation center shaft 34 of the drive shaft 22. Then, the eccentric bearing 23 also performs an eccentric rotational motion, and accordingly, the first and second turning race rings 12b and 12d that are in contact with the end surface 49 of the protrusion 45 also receive a force and perform an eccentric rotational motion. The first and second stationary races 12a and 12c are mounted on and fixed to the first and second stationary members 24 and 25, respectively.

  In this way, the first and second fixing members 24 and 25 are fixed, and the eccentric load 23 is eccentrically rotated, and the thrust load loading means 26 applies the first and second thrust receiving mechanisms 11a and 11b. On the other hand, by applying an eccentric thrust load, the first and second thrust receiving mechanisms 11a and 11b can be evaluated under conditions close to those of the actual machine. In this case, the first turning raceway ring 12b included in the first thrust receiving mechanism 11a and the second turning raceway ring 12d included in the second thrust receiving mechanism 11b are fixed. The degree of coaxiality between the eccentric rotation shaft of the thrust receiving mechanism 11a and the eccentric rotation shaft of the second thrust receiving mechanism 11b can be increased. Therefore, since the first and second turning raceways 12b and 12d can be appropriately eccentrically rotated, the first and second thrust receiving mechanisms 11a and 11b can be evaluated with high accuracy. Since the eccentric bearings 23 can smoothly rotate the rotating raceways of each other in an eccentric manner, the evaluation accuracy can be further improved. Furthermore, the first and second thrust receiving mechanisms 11a and 11b can be evaluated at a time, which is efficient.

  As described above, by using such a thrust receiving mechanism evaluation device 21, the evaluation test of the first and second thrust receiving mechanisms 11a and 11b can be performed accurately and efficiently in a state close to an actual machine. it can.

  In the above-described embodiment, the second fixing member 25 is positioned above the first fixing member 24. However, the present invention is not limited to this, and the first fixing member 24 is the second fixing member 24. You may arrange | position so that it may be located above the fixing member 25. FIG.

  Here, the thickness of the protrusion 45 is not more than the thickness of the fixed first and second turning race rings 12b and 12d. FIG. 5 is an enlarged cross-sectional view near the protrusion 45. Referring to FIG. 5, assuming that the thickness of the protrusion 45 is F and the thickness of the fixed first turning raceway ring 12b and the second turning raceway ring 12d is G, F ≦ G.

  Along with the eccentric rotational motion of the eccentric portion 30, the first and second turning race wheel side cages 15b and 15d included in the first and second thrust receiving mechanisms 11a and 11b also perform the eccentric rotational motion. Here, the 1st and 2nd turning raceway side cages 15b and 15d may be located in the inner diameter side rather than the 1st and 2nd turning raceway rings 12b and 12d. That is, the inner diameter surfaces 57b, 57d of the first and second turning race wheel side cages 15b, 15d are closer to the protrusion 45 side than the inner diameter surfaces 56b, 56d of the first and second turning race rings 12b, 12d. May be placed. Here, if F> G, the inner diameter surfaces 57b, 57d of the first and second turning race wheel side cages 15b, 15d may interfere with the protrusion 45. However, by comprising in this way, interference with the 1st and 2nd turning race ring side holder | retainer 15b, 15d and the protrusion 45 can be prevented.

  Further, a surface 58a of the protrusion 45 that faces the first fixing member 24 is a second fixing member 25 of the first turning race wheel side cage 15b included in the first thrust receiving mechanism 11a. The surface 58b of the protrusion 45 that faces the second fixing member 25 is disposed on the second fixing member 25 side of the surface 59b that faces the second thrust receiving mechanism 11b. Of the turning race wheel side cage 15d, the first fixing member 24 side is arranged with respect to the surface 59d facing the first fixing member 24. By doing so, it is possible to provide a gap between the first and second turning race wheel side cages 15b, 15d that perform eccentric rotational motion and the protrusion 45, and to prevent interference between both members. .

  In the above embodiment, the first turning raceway ring 12b included in the first thrust receiving mechanism 11a and the second turning raceway ring 12d included in the second thrust receiving mechanism 11b are fixed. However, the present invention is not limited to this, and the first turning raceway ring 12b and the second turning raceway ring 12d may be combined. FIG. 6 is an enlarged cross-sectional view of the vicinity of the protrusion 45 when the first and second thrust receiving mechanisms 11c and 11d in this case are attached to the thrust receiving mechanism evaluation device 21. Referring to FIG. 6, turning raceway ring 12e has raceway surfaces 60a and 60b on both sides thereof. The first thrust receiving mechanism 11c includes a turning raceway ring 12e. A first turning race ring side roller (not shown) included in the first thrust receiving mechanism 11c rolls on one raceway surface 60a of the turning race ring 12e. The second thrust receiving mechanism 11d also includes a turning raceway ring 12e. A second turning race ring side roller (not shown) included in the second thrust receiving mechanism 11d rolls on the other raceway surface 60b of the turning race ring 12e.

  In this manner, the use of the turning-side raceway also saves the trouble of fixing the first and second turning raceway rings 12b and 12d, and is included in the first or second thrust receiving mechanism 11c and 11d. The member can be omitted, and it becomes efficient.

  In this case as well, the thickness of the protrusion 63 included in the eccentric bearing 61 and provided on the outer peripheral surface of the outer ring 62 is equal to or less than the thickness of the turning raceway ring 12e (F ′ ≦ G ′). In addition, the surface 58a ′ of the protrusion 63 that faces the first fixing member 24 is the second fixed member of the first turning race wheel side cage 15b ′ included in the first thrust receiving mechanism 11c. The surface 58b ′ opposed to the member 25 is disposed closer to the second fixing member 25 than the surface 59b ′, and the surface 58b ′ of the protrusion 63 facing the second fixing member 25 is included in the second thrust receiving mechanism 11d. Of the second turning race wheel side cage 15d ′, the first fixed member 24 side is arranged on the side of the surface 59d ′ facing the first fixed member 24.

  Furthermore, in order to achieve the lean lubrication conditions in the refrigerant atmosphere in the actual machine, when evaluating with low viscosity oil composed of white kerosene or PAG (polyalkylene glycol) oil, etc. You may provide seals, such as hydrogenated ethylene resin and hydrogenated nitrile rubber.

  Next, using the thrust receiving mechanism evaluation device 21 described above, a test for evaluating the wear amount of the races included in the first and second thrust receiving mechanisms 11a, 11b and the like was performed. FIG. 7 (A) and FIG. 7 (B) show the generatrix curves 71a and 71b of the bearing rings.

  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. 7 (A) is an actual machine, that is, the bus bar shape curve 71a of the bearing ring of the thrust receiving mechanism provided in the scroll type compressor described above, FIG. 7 (B) relates to the present invention. The bus bar shape curve 71b of the bearing ring of the thrust receiving mechanism provided in the thrust receiving mechanism evaluation apparatus and applied with the eccentric thrust load is shown.

  With reference to FIG. 7 (A), the bus bar shape curve 71a of the bearing ring included in the thrust receiving mechanism provided in the actual machine is worn by about 3.5 μm. On the other hand, with reference to FIG. 7 (B), the generatrix curve 71b of the bearing ring attached to the fixed member side is also worn by about 3.5 μm.

  Thus, the amount of wear of the races is substantially the same. Therefore, the maximum wear amount of the raceway ring in the actual machine and the maximum wear amount of the raceway ring in the thrust receiving mechanism evaluation device according to the present invention are substantially the same.

  In the above embodiment, the first turning raceway ring 12b and the second turning raceway ring 12d are fixed by the pair of first turning raceway side guide pins 16b. Not limited to this, a guide pin may be provided, and the first and second turning raceways 12b and 12d may be fixed by this guide pin. Moreover, you may decide to fix the 1st and 2nd turning track rings 12b and 12d etc. with members other than a guide pin.

  In the above-described embodiment, the inner diameter surfaces 56b and 56d of the first and second turning raceways 12b and 12d are brought into contact with the radial end surface 49 of the protrusion 45. Not only, but only one of them, that is, only the inner surface 56b or the inner surface 56d may be rolled. Although the eccentric bearing 23 is used as the turning member, the present invention is not limited to this, and a disc-shaped member having a protrusion 45 extending in the radial direction may be used. In this case, the rolling contact surface between the radial end surface 49 of the protrusion 45 and the inner surface 56a of the second race 12b is rolled to cause an eccentric rotational movement. Further, the eccentric bearing 23 may be a slide bearing.

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

  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.

  The thrust receiving mechanism evaluation device according to the present invention can accurately and efficiently evaluate the thrust receiving mechanism in a state close to that of an actual machine, so that the thrust receiving mechanism provided in a mass-produced scroll compressor or the like It is used effectively when evaluating the performance.

It is the schematic of the thrust receiving mechanism evaluation apparatus which concerns on one Embodiment of this invention. It is a disassembled perspective view which shows the 1st thrust receiving mechanism evaluated by the thrust receiving mechanism evaluation apparatus. It is an expanded sectional view showing the part shown by III in FIG. 1 among the thrust receiving mechanism evaluation apparatuses shown in FIG. It is sectional drawing which shows (A) roller bearing type and (B) roller follower type among the eccentric bearings contained in a thrust receiving mechanism evaluation apparatus. It is an expanded sectional view which shows the protrusion vicinity contained in the eccentric bearing. It is sectional drawing showing the case where the thrust receiving mechanism at the time of combining the turning track | orbit of the 1st and 2nd thrust receiving mechanism is attached to the thrust receiving mechanism evaluation apparatus. It is a figure showing the amount of wear of the bearing ring included in the thrust receiving mechanism tested by the thrust receiving mechanism evaluation device, (A) bus bar shape curve of the bearing ring provided in the thrust receiving mechanism in the actual machine, (B) thrust receiving mechanism It is a figure which shows the bus-line shape curve of the bearing ring of the thrust receiving mechanism to which the eccentric thrust load was added by the evaluation apparatus. It is the schematic which shows the operating principle of a scroll type compressor. It is a disassembled perspective view showing the conventional thrust receiving mechanism. It is sectional drawing which shows a part of conventional thrust receiving mechanism. It is the schematic which looked at the conventional thrust bearing from the axial direction.

Explanation of symbols

  11a, 11c first thrust receiving mechanism, 11b, 11d second thrust receiving mechanism, 12a first fixed raceway, 12b first turning raceway, 12c second fixed raceway, 12d second turning raceway Wheel, 12e turning raceway wheel, 13a first intermediate wheel, 13b second intermediate wheel, 14a first fixed raceway side roller, 14b first turning raceway side roller, 14c second fixed raceway side roller , 15a First fixed race ring side cage, 15b, 15b ′ First turning race ring side cage, 15c Second fixed race ring side cage, 15d, 15d ′ Second turning race ring side cage 16a first fixed race ring side guide pin, 16b first turning race ring side guide pin, 17a, 17b first round hole, 17d second round hole, 18a, 18b, 19a, 19b first long hole, 18d, 19 Second long hole, 20a housing, 20b Rotating member, 21 Thrust receiving mechanism evaluation device, 22 Drive shaft, 23, 51, 61 Eccentric bearing, 24 First fixing member, 25 Second fixing member, 26 Thrust load Load means, 27 fixed portion, 28 casing, 30 eccentric portion, 31 central shaft, 32 recess, 33, 34 rotation central shaft, 35 load load ball, 36 load point, 37 shaft portion, 41, 52, 62 outer ring, 42 , 53a, 53b Roller, 43 Cage, 44a Flange, 44b Side plate, 45, 54, 63 Projection, 46 Outer diameter surface, 47a, 47b Width surface, 48a, 48b Side surface, 49 End surface, 56b, 56d, 57b, 57d Inner diameter Surface, 58a, 58a ′, 58b, 58b ′, 59b, 59b ′, 59d, 59d ′ surface, 60a, 60b orbital surface, 71a, 71 b Busbar shape curve.

Claims (7)

A thrust receiving mechanism evaluation device that evaluates the first and second thrust receiving mechanisms that support the thrust load by interposing between the first member and the second member that perform eccentric rotational movement between each other. A fixed raceway fixed to the first member, a turning raceway fixed to the second member, an intermediate wheel disposed between the fixed raceway and the turning raceway, a fixed raceway and an intermediate ring, A plurality of fixed race ring side rollers disposed between the fixed race ring side rollers, a fixed race ring side cage having a plurality of pockets for holding the fixed race ring side rollers so that their rolling axes are parallel to each other; A plurality of swiveling race ring side rollers arranged between the wheel and the intermediate ring, and a swiveling race ring side holding having a plurality of pockets for holding the swiveling race ring side rollers so that their rolling axes are parallel to each other. A rolling shaft of a fixed race ring side roller and a turning race ring. A fixed bearing ring side guide pin that is orthogonal to the rolling axis of the roller and extends from the first member through the fixed bearing ring and the fixed bearing ring side cage to the intermediate ring, and the second It has a turning raceway side guide pin that extends from the member to the turning raceway ring and the turning raceway side cage and extends to the intermediate wheel, and the fixed raceway side guide pin is orthogonal to the rolling axis of the fixed raceway side roller. Can be moved within the restricted range of the fixed track ring side cage and the intermediate ring, and the swivel track ring side guide pin can be moved in the direction perpendicular to the rolling axis of the swing track ring side roller. And a thrust receiving mechanism evaluation device that evaluates the first and second thrust receiving mechanisms at a time, wherein the first and second thrust receiving mechanisms are movable within the regulation range of the intermediate wheel.
First and second fixing members;
A drive shaft having an eccentric portion disposed between the first and second fixing members at the tip;
A swiveling member that is mounted on the eccentric part, is provided between the first and second fixing members, includes a radially extending protrusion, and performs an eccentric rotational movement with respect to the first and second fixing members. When,
A thrust load loading means for applying a thrust force toward the first fixing member to the second fixing member and applying a thrust load to the first and second thrust receiving mechanisms;
The first thrust receiving mechanism is arranged by mounting the first fixed raceway included in the first thrust receiving mechanism on the first fixing member,
The second thrust receiving mechanism includes a second fixed raceway included in the second thrust receiving mechanism attached to the second fixing member, and a second turning included in the second thrust receiving mechanism. The track ring is fixedly disposed on the first turning race ring included in the first thrust receiving mechanism,
The thrust receiving mechanism evaluation device, wherein a radial end surface of the protrusion is in rolling contact with an inner diameter surface of the first or second turning raceway ring. The first and second turning race rings are provided by a first turning race ring side guide pin included in the first thrust receiving mechanism or a second turning race ring side guide pin included in the second thrust receiving mechanism. The thrust receiving mechanism evaluation device according to claim 1, which is fixed. The turning member is an eccentric bearing including an outer ring and a plurality of rollers,
The thrust receiving mechanism evaluation device according to claim 1, wherein the protrusion is provided on an outer peripheral surface of the outer ring. The thrust receiving mechanism evaluation device according to any one of claims 1 to 3, wherein the first and second turning raceways are also used. The thrust receiving mechanism evaluation apparatus according to any one of claims 1 to 4, wherein a thickness of the protrusion is equal to or less than an axial thickness of the fixed first and second turning raceways. Of the protrusions, the surface facing the first fixing member is the surface facing the second fixing member of the first turning race wheel side cage included in the first thrust receiving mechanism. Than the second fixing member side,
Of the protrusions, the surface facing the second fixing member is the surface facing the first fixing member of the second turning race wheel side cage included in the second thrust receiving mechanism. The thrust receiving mechanism evaluation device according to any one of claims 1 to 5, wherein the thrust receiving mechanism evaluation device is disposed closer to the first fixing member. The thrust receiving mechanism evaluation device according to any one of claims 1 to 6, 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.

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