RESTRICTION COMPONENT

Abstract

There is provided a restriction component with good slidability. A restriction component is provided on a back surface of a movable scroll that slides relative to a fixed scroll while rotating eccentrically, and restricts a rotation of the movable scroll while allowing the eccentric rotation of the movable scroll, and the restriction component is provided with a dynamic pressure generation groove configured for generating a dynamic pressure on the back surface of the movable scroll.

Claims

1. A restriction component that is provided on a back surface of a movable scroll that is configured to slide relative to a fixed scroll while rotating eccentrically, and that restricts a rotation of the movable scroll while allowing the eccentric rotation of the movable scroll, wherein the restriction component is provided with a dynamic pressure generation groove configured for generating a dynamic pressure at a location facing the movable scroll.

2. The restriction component according to claim 1, wherein the restriction component is comprised of a pin inserted into a pocket provided in the movable scroll, and a rotating body rotatably attached to the pin, and the dynamic pressure generation groove is formed in the rotating body.

3. The restriction component according to claim 2, wherein the rotating body is eccentrically attached to the pin.

4. The restriction component according to claim 2, wherein one end of the dynamic pressure generation groove is configured to communicate with an outside of the rotating body.

5. The restriction component according to claim 2, wherein the dynamic pressure generation groove has an arcuate shape.

6. The restriction component according to claim 2 4, wherein the dynamic pressure generation groove is provided in the rotating body to face a bottom surface of the pocket.

7. The restriction component according to claim 3, wherein the dynamic pressure generation groove is provided in the rotating body to face a bottom surface of the pocket.

8. The restriction component according to claim 4, wherein the dynamic pressure generation groove is provided in the rotating body to face a bottom surface of the pocket.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0015] FIG. 1 is a schematic configuration view illustrating a scroll compressor to which an anti-rotation mechanism serving as a restriction component according to a first embodiment of the present invention is applied.

[0016] FIG. 2A is a schematic enlarged cross-sectional view illustrating a peripheral structure of the anti-rotation mechanism in the first embodiment, FIG. 2B is a front view of a rotating body, and FIG. 2C is a rear view of the rotating body.

[0017] FIG. 3A is a schematic view illustrating a state when a movable scroll is at a 12 o'clock position on a rotation trajectory of the movable scroll, and FIG. 3B is a schematic view illustrating a state when the movable scroll is at a 3 o'clock position on the rotation trajectory.

[0018] FIG. 4A is a schematic view illustrating a state when the movable scroll is at a 6 o'clock position on the rotation trajectory, and FIG. 4B is a schematic view illustrating a state when the movable scroll is at a 9 o'clock position on the rotation trajectory.

[0019] FIG. 5 is a schematic cross-sectional view illustrating the state of relative sliding between a tip surface of the rotating body and a bottom surface of a pocket.

[0020] FIG. 6 is a schematic cross-sectional view illustrating a restriction component according to a second embodiment of the present invention.

[0021] FIG. 7A is a schematic cross-sectional view illustrating a restriction component according to a third embodiment of the present invention, and FIG. 7B is a schematic view illustrating a front surface of the restriction component.

DESCRIPTION OF EMBODIMENTS Modes for implementing a restriction component according to the present invention will be described below based on embodiments.

First Embodiment

[0022] A restriction component according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.

[0023] The restriction component according to the first embodiment of the present invention is applied to a rotating machine including an eccentric mechanism, for example, a scroll compressor C that suctions, compresses, and discharges a refrigerant serving as a fluid used in an air conditioning system of an automobile or the like. Incidentally, in the present embodiment, the refrigerant is a gas, and is mixed with lubricating oil in the form of mist.

[0024] First, the scroll compressor C will be described. As illustrated in FIG. 1, the scroll compressor C is mainly composed of a housing 1; a rotating shaft 2; an inner casing 3; a scroll compression mechanism 4; a side seal 7; a thrust plate 8 serving as a thrust receiving mechanism; a drive motor M; and an anti-rotation mechanism 9 serving as a restriction component.

[0025] The housing 1 is composed of a casing 11 having a cylindrical shape, and a cover 12 that closes an opening of the casing 11. An opening of the casing 11 on the side axially opposite to the opening closed by the cover 12 is closed by the drive motor M.

[0026] Inside the casing 11, a low-pressure chamber 20 serving as an external space on a low-pressure side to which low-pressure refrigerant is supplied from a refrigerant circuit (not illustrated) through a suction port 10, a high-pressure chamber 30 from which high-pressure refrigerant compressed by the scroll compression mechanism 4 is discharged, and a back pressure chamber 50 serving as an external space on a high-pressure side to which some of the refrigerant compressed by the scroll compression mechanism 4 is supplied together with the lubricating oil are formed. Incidentally, the back pressure chamber 50 is formed inside the inner casing 3 having a cylindrical shape that is accommodated inside the casing 11.

[0027] A discharge communication passage 13 communicating between the refrigerant circuit (not illustrated) and the high-pressure chamber 30 is formed in the cover 12. In addition, a part of a back pressure communication passage 14 communicating between the high-pressure chamber 30 and the back pressure chamber 50 is formed in the cover 12 by branching off from the discharge communication passage 13. Incidentally, an oil separator 6 that separates the lubricating oil from the refrigerant is provided in the discharge communication passage 13.

[0028] The inner casing 3 is fixed in a state where an axial end portion of the inner casing 3 abuts against an end plate 41a of a fixed scroll 41 constituting the scroll compression mechanism 4. In addition, a suction communication passage 15 is formed in a side wall of the inner casing 3 so as to penetrate therethrough in a radial direction. Namely, the low-pressure chamber 20 is formed from the outside of the inner casing 3 to the inside of the inner casing 3 via the suction communication passage 15. The refrigerant supplied to the inside of the inner casing 3 through the suction communication passage 15 is suctioned into the scroll compression mechanism 4.

[0029] The scroll compression mechanism 4 is mainly composed of the fixed scroll 41 fixed to the cover 12 in a sealed manner, and the movable scroll 42 accommodated inside the inner casing 3.

[0030] The fixed scroll 41 is made of metal, and includes a scroll wrap 41b protruding from a surface of the end plate 41a having a disk shape, namely, from the end plate 41a toward the movable scroll 42. In addition, a recess 41c formed by recessing a radial inner side of a back surface of the end plate 41a, namely, an end surface of the end plate 41a in a direction opposite to the cover 12, the end surface abutting against the cover 12, is formed in the fixed scroll 41, and the high-pressure chamber 30 is defined by the recess 41c and the cover 12.

[0031] The movable scroll 42 is made of metal, and includes a scroll wrap 42b protruding from a surface of an end plate 42a having a disk shape, namely, from the end plate 42a toward the fixed scroll 41. In addition, a boss 42c protruding from the center of a back surface of the end plate 42a is formed on the movable scroll 42. An eccentric portion 2a formed on the rotating shaft 2 is inserted into the boss 42c so as to be capable of relative rotation. Incidentally, in the present embodiment, the eccentric portion 2a of the rotating shaft 2 and a counterweight portion 2b protruding from the rotating shaft 2 in a radially outward direction constitute an eccentric mechanism that eccentrically rotates the rotating shaft 2.

[0032] In addition, a pocket 42d into which the anti-rotation mechanism 9 to be described later is inserted is formed on the back surface of the end plate 42a of the movable scroll 42. The pocket 42d is a bottomed hole.

[0033] When the rotating shaft 2 is rotationally driven by the drive motor M, the eccentric portion 2a rotates eccentrically. The pocket 42d of the movable scroll 42 is guided by the anti-rotation mechanism 9, so that the movable scroll 42 slides relative to the fixed scroll 41 while rotating eccentrically in a state where the movable scroll 42 maintains the posture with respect to the fixed scroll 41. At this time, the movable scroll 42 rotates eccentrically with respect to the fixed scroll 41, and the contact position between the wraps 41b and 42b moves sequentially in a rotation direction along with this rotation, and a compression chamber 40 formed between the wraps 41b and 42b is gradually reduced while moving toward the center. Accordingly, the refrigerant suctioned into the compression chamber 40 from the low-pressure chamber 20 formed on the radial outer side of the scroll compression mechanism 4 is compressed, and finally, the high-pressure refrigerant is discharged into the high-pressure chamber 30 through a discharge hole 41d provided at the center of the fixed scroll 41. Incidentally, the guidance of the movable scroll 42 by the anti-rotation mechanism 9 will be described in detail later.

[0034] Next, the side seal 7 will be described. The side seal 7 is made of resin that is elastically deformable, has a rectangular cross section and an annular shape when viewed in an axial direction, and is fixed to the back surface of the end plate 42a of the movable scroll 42.

[0035] A sliding surface 7a that abuts against a sliding surface 8a (refer to FIG. 1) formed on the thrust plate 8 is formed on the side seal 7. The sliding surface 7a is a flat surface, and constitutes a back surface-side sliding surface of the movable scroll 42.

[0036] Next, the thrust plate 8 will be described. The thrust plate 8 is made of metal and has an annular shape, a seal ring 43 is fixed to the thrust plate 8, and the seal ring 43 abuts against an inner bottom surface of the inner casing 3. Accordingly, the thrust plate 8 functions as a thrust receiving mechanism that receives an axial load of the movable scroll 42 via the side seal 7.

[0037] In addition, the side seal 7 and the seal ring 43 partition the low-pressure chamber 20 formed on the radial outer side of the movable scroll 42 and the back pressure chamber 50 formed on a back surface side of the movable scroll 42 off from each other inside the inner casing 3. The back pressure chamber 50 is formed as a sealed space by sealing a gap between a through-hole 3a and the rotating shaft 2 inserted into the through-hole 3a with a seal ring 44 fixed to an inner periphery of the through-hole 3a provided at the center of the inner casing 3.

[0038] In addition, an orifice (not illustrated) is provided in the back pressure communication passage 14 that is formed through the cover 12, the fixed scroll 41, and the inner casing 3, and that communicates between the high-pressure chamber 30 and the back pressure chamber 50, and the refrigerant in the high-pressure chamber 30, of which the pressure is adjusted to be reduced by the orifice, is supplied to the back pressure chamber 50, together with the lubricating oil separated by the oil separator 6. At this time, the pressure in the back pressure chamber 50 is adjusted to be higher than the pressure in the low-pressure chamber 20. Incidentally, a pressure relief hole 16 penetrating through the inner casing 3 in the radial direction and communicating between the low-pressure chamber 20 and the back pressure chamber 50 is formed in the inner casing 3, and a pressure adjustment valve 45 is provided in the pressure relief hole 16. The pressure adjustment valve 45 opens when the pressure in the back pressure chamber 50 becomes higher than a set value.

[0039] In addition, the boss 42c of the movable scroll 42 is inserted into a through-hole 8b at the center of the thrust plate 8. The through-hole 8b is formed with a diameter large enough to allow eccentric rotation of the eccentric portion 2a of the rotating shaft 2 that is inserted into the boss 42c. Namely, the sliding surface 7a of the side seal 7 is slidable relative to the sliding surface 8a of the thrust plate 8 while rotating eccentrically due to the eccentric rotation of the rotating shaft 2 (refer to FIGS. 3 and 4).

[0040] Next, the anti-rotation mechanism 9 will be described. As illustrated in FIG. 2A, the anti-rotation mechanism 9 is composed of a pin 91 and a rotating body 92. The anti-rotation mechanism 9 is disposed closer to the radial inner side than the side seal 7.

[0041] The pin 91 extends from a disk-shaped body portion of the thrust plate 8 toward a movable scroll 42 side, and has a columnar shape. A plurality of the pins 91 (six pieces in the present embodiment) are evenly spaced in the circumferential direction of the thrust plate 8 (refer to FIGS. 3 and 4).

[0042] As illustrated in FIGS. 2A to 2C, the rotating body 92 is a disk-shaped member made of metal, and is provided with a recess 93 and a dynamic pressure generation groove 94. Incidentally, in FIG. 2A, for convenience of description, the dynamic pressure generation groove 94 is illustrated as being deeper than the dynamic pressure generation groove 94 actually is.

[0043] The rotating body 92 has a smaller diameter than the pocket 42d of the movable scroll 42. In the present embodiment, the diameter of the pocket 42d is formed to be approximately 1.2 times the diameter of the rotating body 92. Incidentally, it is preferable that the diameter of the pocket 42d is approximately 1.1 to 1.5 times the diameter of the rotating body 92.

[0044] The recess 93 is open on a thrust plate 8 side of the rotating body 92, and is provided closer to an outer peripheral surface side of the rotating body 92 than the center of the rotating body 92. A tip portion of the pin 91 is inserted into the recess 93 so as to be capable of relative rotation. Namely, the rotating body 92 can rotate eccentrically with respect to the pin 91.

[0045] In addition, a tip surface 92a of the rotating body 92 and a bottom surface 42e of the pocket 42d abut against each other when the thrust plate 8 is not in operation, and are slightly separated from each other during relative rotation as will be described later (refer to FIG. 5). In addition, an outer peripheral surface of the rotating body 92 is in press contact with an inner peripheral surface of the pocket 42d.

[0046] The dynamic pressure generation groove 94 is provided to be open on the movable scroll 42 side of the rotating body 92. The dynamic pressure generation groove 94 extends in an arcuate shape, one end 94a communicates with the outside of the rotating body 92, and the other end 94b is closed.

[0047] FIGS. 3 and 4 illustrate a rotation trajectory of the movable scroll 42 when viewed from a fixed scroll 41 side.

[0048] FIG. 3A illustrates when the movable scroll 42 is at a 12 o'clock position on the rotation trajectory, and FIG. 3B illustrates when the movable scroll 42 is at a 3 o'clock position on the rotation trajectory. FIG. 4A illustrates when the movable scroll 42 is at a 6 o'clock position on the rotation trajectory, and FIG. 4B illustrates when the movable scroll 42 is at a 9 o'clock position on the rotation trajectory.

[0049] In a state illustrated in FIG. 3A, the rotating bodies 92 are disposed at the 12 o'clock position around the pins 91.

[0050] When the movable scroll 42 transitions from the state illustrated in FIG. 3A to a state illustrated in FIG. 3B, the rotating bodies 92 rotate clockwise due to friction between the outer peripheral surfaces of the rotating bodies 92 and the inner peripheral surfaces of the pockets 42d, and in the state illustrated in FIG. 3B, the rotating bodies 92 are disposed at the 3 o'clock position around the pins 91.

[0051] At this time, since a plurality of the pockets 42d are guided by the anti-rotation mechanisms 9 at a plurality of locations in the circumferential direction, the movable scroll 42 rotates eccentrically in a state where the movable scroll 42 maintains the posture. In other words, the movable scroll 42 is guided by a plurality of the anti-rotation mechanisms 9 such that the movable scroll 42 is restricted from rotating while being allowed to rotate eccentrically.

[0052] In addition, when the movable scroll 42 transitions from the state illustrated in FIG. 3B to a state illustrated in FIG. 4A, the rotating bodies 92 rotate clockwise, and in the state illustrated in FIG. 4A, the rotating bodies 92 are disposed at the 6 o'clock position around the pins 91.

[0053] In addition, when the movable scroll 42 transitions from the state illustrated in FIG. 4A to a state illustrated in FIG. 4B, the rotating bodies 92 rotate clockwise, and in the state illustrated in FIG. 4B, the rotating bodies 92 are disposed at the 9 o'clock position around the pins 91.

[0054] Since the movable scroll 42 rotates eccentrically in a state where the movable scroll 42 maintains the posture, and the rotating bodies 92 rotate eccentrically around the pins 91, when the movable scroll 42 rotates eccentrically, the tip surfaces 92a of the rotating bodies 92 and the bottom surfaces 42e of the pockets 42d slide relative to each other (refer to FIG. 5).

[0055] The relative sliding between the tip surface 92a of the rotating body 92 and the bottom surface 42e of the pocket 42d will be described with reference to FIG. 5. Incidentally, FIG. 5 is a view in which one rotating body 92 in FIG. 3A is cut and developed along the dynamic pressure generation groove 94. Furthermore, for convenience of description, the dynamic pressure generation groove 94 is illustrated as being deeper than the dynamic pressure generation groove 94 actually is.

[0056] As illustrated in FIG. 5, when the tip surface 92a of the rotating body 92 and the bottom surface 42e of the pocket 42d slide relative to each other, the fluid in the dynamic pressure generation groove 94 moves from the one end 94a toward the other end 94b. Accordingly, dynamic pressure is generated at the other end 94b, the tip surface 92a and the bottom surface 42e are slightly separated from each other, and a fluid film is formed by the fluid. In addition, the fluid is constantly supplied to the dynamic pressure generation groove 94 from the one end 94a.

[0057] Incidentally, since the side seal 7 is disposed in a compressed state between the movable scroll 42 and the thrust plate 8, even when the movable scroll 42 moves toward the fixed scroll 41 side due to the dynamic pressure in the dynamic pressure generation groove 94, the sealed state between the movable scroll 42 and the thrust plate 8 is maintained due to elastic return of the side seal 7.

[0058] As described above, the dynamic pressure generation groove 94 capable of generating dynamic pressure on the back surface of the movable scroll 42 is formed in the anti-rotation mechanism 9. According to this configuration, since dynamic pressure can be generated in the dynamic pressure generation groove 94 by relative movement between the movable scroll 42 and the thrust plate 8, and the movable scroll 42 and the thrust plate 8 can be separated from each other, slidability between the movable scroll 42 and the thrust plate 8 can be improved.

[0059] In addition, since the anti-rotation mechanism 9 including the dynamic pressure generation groove 94 is provided at a position closer to the radial inner side than the side seal 7 that is a seal portion between the movable scroll 42 and the thrust plate 8, the fluid in the back pressure chamber 50 that is the high-pressure side does not leak into the low-pressure chamber 20 that is the low-pressure side.

[0060] In addition, the anti-rotation mechanism 9 is composed of the pin 91 inserted into the pocket 42d provided in the movable scroll 42, and the rotating body 92 rotatably attached to the pin 91, and the dynamic pressure generation groove 94 is formed in the rotating body 92. According to this configuration, since the rotating body 92 rotates to follow the eccentric rotation of the movable scroll 42, dynamic pressure can be generated regardless of the position of the movable scroll 42.

[0061] In addition, the pin 91 is inserted into the recess 93 provided on a back surface of the rotating body 92, and when dynamic pressure is generated by the dynamic pressure generation groove 94, the movement of the rotating body 92 toward a back surface side can be restricted by the tip surface of the pin 91.

[0062] In addition, the rotating body 92 is eccentrically attached to the pin 91. According to this configuration, the rotating body 92 can be smoothly rotated in accordance with the eccentric rotation of the movable scroll 42.

[0063] In addition, since the one end 94a of the dynamic pressure generation groove 94 communicates with the outside of the rotating body 92, the fluid can be smoothly taken into the dynamic pressure generation groove 94 from the outside of the rotating body 92.

[0064] In addition, since the dynamic pressure generation groove 94 has an arcuate shape, dynamic pressure can be efficiently generated in accordance with the eccentric rotation of the rotating body 92.

[0065] In addition, the dynamic pressure generation groove 94 is provided on the tip surface 92a of the rotating body 92 to face the bottom surface 42e of the pocket 42d. According to this configuration, since dynamic pressure can be received by the bottom surface 42e of the pocket 42d which has a large area, dynamic pressure can be stably generated.

Second Embodiment

[0066] A restriction component according to a second embodiment of the present invention will be described with reference to FIG. 6. Incidentally, the description of configurations that are the same as and overlap with the configurations of the first embodiment will be omitted.

[0067] As illustrated in FIG. 6, an anti-rotation mechanism 29 of the second embodiment is composed of a pin 291 extending from a thrust plate 28, and a rotating body 292 attached to the pin 291 so as to be eccentrically rotatable.

[0068] The rotating body 292 is formed with a smaller diameter than a pocket 242d. A movable scroll 242 side of the rotating body 292 is loosely inserted into the pocket 242d.

[0069] In addition, in a state where the pin 291 is inserted into a recess 293, a back surface 292b of the rotating body 292 abuts against a sliding surface 28a of the thrust plate 28. A dynamic pressure generation groove 294 is formed on the back surface 292b.

[0070] When a movable scroll 242 rotates eccentrically, the rotating body 292 also rotates eccentrically with respect to the pin 291, and the back surface 292b of the rotating body 292 and the sliding surface 28a of the thrust plate 28 slide relative to each other. Accordingly, dynamic pressure is generated in the dynamic pressure generation groove 294, the back surface 292b and the sliding surface 28a are slightly separated from each other, and a fluid film is formed by the fluid.

Third Embodiment

[0071] A restriction component according to a third embodiment of the present invention will be described with reference to FIG. 7. Incidentally, the description of configurations that are the same as and overlap with the configurations of the first embodiment will be omitted.

[0072] As illustrated in FIG. 7, an anti-rotation mechanism 39 of the third embodiment is a pin 391 extending from a thrust plate 38 toward a movable scroll 342. The configurations of the rotating bodies 92 and 292 of the first and second embodiments are omitted.

[0073] A dynamic pressure generation groove 394 having an arcuate shape is provided on a tip surface 391a of the pin 391.

[0074] When the rotating shaft 2 (refer to FIG. 1) rotates, an inner peripheral surface of a pocket 342d is guided by the pin 391, so that the movable scroll 342 rotates eccentrically in a state where the movable scroll 342 maintains the posture, and the tip surface 391a of the pin 391 and a bottom surface 342e of the pocket 342d slide relative to each other. Accordingly, dynamic pressure is generated in the dynamic pressure generation groove 394, the tip surface 391a and the bottom surface 342e are slightly separated from each other, and a fluid film is formed by the fluid.

[0075] The embodiments of the present invention have been described above with reference to the drawings; however, specific configurations are not limited to these embodiments, and modifications or additions that are made without departing from the scope of the present invention are also included in the present invention.

[0076] For example, in the first to third embodiments, the mode in which the plurality of restriction components are provided has been provided as an example; however, at least one restriction component may be provided as long as the restriction component can restrict the movable scroll from rotating while allowing the movable scroll to rotate eccentrically.

[0077] In addition, in the first and second embodiments, the mode in which the rotating body has a disk shape has been provided as an example; however, the shape of the rotating body can be freely changed as long as the shape allows the rotating body to be guided along the inner peripheral surface of the pocket.

[0078] In addition, in the first to third embodiments, the mode in which one dynamic pressure generation groove is provided for one restriction component has been provided as an example; however, a plurality of the dynamic pressure generation grooves may be provided for one restriction component.

[0079] In addition, in the first to third embodiments, the mode in which the dynamic pressure generation groove has an arcuate shape has been provided as an example; however, for example, the dynamic pressure generation groove may extend linearly in the circumferential direction, or the shape of the dynamic pressure generation groove can be freely changed.

[0080] In addition, in the first to third embodiments, the mode in which the one end of the dynamic pressure generation groove communicates with the outer space has been provided as an example; however, for example, the dynamic pressure generation groove may have a shape partitioned off from the outer space, such as a dimple.

[0081] In addition, in the first to third embodiments, the mode in which the restriction component is disposed on the radial inner side of the side seal, namely, in the back pressure chamber has been provided as an example; however, the restriction component may be disposed on the radial outer side of the side seal, namely, in the low-pressure chamber.

[0082] In addition, in the first to third embodiments, the mode in which the rotating body is made of metal has been provided as an example; however, the material of the rotating body may be freely selected depending on the usage environment or the like.

[0083] In addition, in the first to third embodiments, the mode in which the thrust plate serving as a thrust receiving mechanism is applied to the scroll compressor C used in an air conditioning system of an automobile or the like has been described; however, the present invention is not limited to this mode, and may be applied to, for example, a scroll expander-compressor or the like in which an expander and a compressor are integrally provided as long as the scroll expander-compressor is a rotating machine including an eccentric mechanism.

[0084] In addition, in the first to third embodiments, the radial outer side and the radial inner side of the thrust plate have been described as the low-pressure side and the high-pressure side, respectively; however, the radial outer side and the radial inner side of the thrust plate may be the high-pressure side and the low-pressure side, respectively.

[0085] In addition, the fluid present in the spaces inside and outside the sliding surface of the thrust receiving mechanism may be any of gas, liquid, and a mixture of gas and liquid.

[0086] In addition, in the first to third embodiments, the mode in which the side seal slides relative to the thrust plate has been provided as an example; however, the back surface of the movable scroll may directly slide relative to the thrust plate.

[0087] In addition, in the first and second embodiments, the mode in which the rotating body comes into contact with the tip of the pin has been provided as an example; however, the tip of the pin may not come into contact with the rotating body. For example, the recess of the rotating body may be formed as a through-hole instead of a bottomed hole, and the back surface of the rotating body may be abut against the sliding surface 28a of the thrust plate in a state where the rotating body is inserted onto the pin.

[0088] In addition, in the first to third embodiments, the mode in which the tip surface of the rotating body and the bottom surface of the pocket abut against each other when the thrust plate is not in operation, and are separated from each other during relative rotation has been provided as an example; however, the tip surface and the bottom surface may be separated from each other when the thrust plate is not in operation as long as dynamic pressure can be generated by relative rotation therebetween.

REFERENCE SIGNS LIST

[0089] 4 Scroll compression mechanism [0090] 7 Side seal [0091] 8 Thrust plate (thrust receiving mechanism) [0092] 9 Anti-rotation mechanism (restriction component) [0093] 20 Low-pressure chamber [0094] 28 Thrust plate [0095] 29 Anti-rotation mechanism (restriction component) [0096] 30 High-pressure chamber [0097] 38 Thrust plate [0098] 39 Anti-rotation mechanism (restriction component) [0099] 41 Fixed scroll [0100] 42 Movable scroll [0101] 42d Pocket [0102] 42e Bottom surface [0103] 50 Back pressure chamber [0104] 91 Pin [0105] 92 Rotating body [0106] 92a Tip surface [0107] 94 Dynamic pressure generation groove [0108] 94a One end [0109] 94b The other end [0110] 242 Movable scroll [0111] 242d Pocket [0112] 291 Pin [0113] 292 Rotating body [0114] 294 Dynamic pressure generation groove [0115] 342 Movable scroll [0116] 342d Pocket [0117] 342e Bottom surface [0118] 391 Pin [0119] 391a Tip surface [0120] 394 Dynamic pressure generation groove [0121] C Scroll compressor