Scroll compressor

Abstract

A scroll compressor (10) has a fixed scroll (41), a revolving scroll (51) that revolves relative to the fixed scroll (41), a rotation prevention mechanism that prevents the revolving scroll (51) from rotating on its own axis and allows the revolving scroll (51) to revolve around its own axis, and a housing constituent body (15) that supports the revolving scroll (51). One of the revolving scroll (51) and the housing constituent body (15) has a first surface (52a), and the other has a second surface (15a) that faces the first surface (52a). The rotation prevention mechanism has a plurality of receiving portions (55) provided to the first surface (52a) and a plurality of rotation prevention pins (17) that respectively protrude from the second surface (15a) toward the receiving portions (55). The revolving scroll (51) is prevented from rotating on its own axis by the receiving portions (55) and the rotation prevention pins (17) corresponding thereto abutting against each other. The second surface (15a) is provided with a cylindrical holding wall (72) that holds the plurality of rotation prevention pins (17) so as to stand up therefrom.

Description

TECHNICAL FIELD

[0001] The present application relates to a scroll compressor. BACKGROUND

[0002] A scroll compressor stops the revolution of a revolving scroll and makes the revolving scroll revolve with respect to a fixed scroll. In order to make the revolving scroll revolve, the scroll compressor is provided with a revolution stopping mechanism.

[0003] In the scroll compressor disclosed in Patent Literature 1, a plurality of ring holes are provided on the inner side end surface of the front housing. On the inner wall of each ring hole, four protrusions are provided at intervals of 90 degrees. A ring is fitted in each ring hole with a clearance. The ring is supported at a part of the circumference by the plurality of protrusions. That is, the ring is fitted in the ring hole with a clearance. A plurality of pins are inserted in the back surface of the revolving scroll. Each pin is loosely inserted in the corresponding ring.

[0004] The revolving scroll is engaged with the front housing by the pins being loosely inserted in the rings, and is prevented from revolving when revolving with respect to the fixed scroll. At this time, the pins rotate along the inner circumferential surface of the ring in the same direction as the revolving direction of the revolving scroll.

[0005] In such a scroll compressor, the pin that bears the moment acting on the revolving scroll switches four times during one revolution of the revolving scroll. At the time of the switching, the load is borne by the ring.

[0006]

Prior Art Documents

[0007]

Patent Literature

[0008]

Patent Literature 1

[0009] Problems to be Solved by the Invention

[0010] In the ring, the part supported by the protrusions is higher in rigidity than the part that does not receive the support by the protrusions. On the other hand, in the ring, the part not supported by the protrusions is lower in rigidity than the part that receives the support by the protrusions. In this way, the part higher in rigidity and the part lower in rigidity coexist in the circumference of the ring, and thus the bearing manner of the load differs depending on the rigidity, which becomes a cause of vibration and noise.

[0011] Technical Solution for Solving the Problem

[0012] According to one aspect of the present invention, a scroll compressor includes a housing, a rotating shaft housed in the housing, a fixed scroll member, a rotary scroll member configured to rotate relative to the fixed scroll member, a rotation-stopping mechanism configured to prevent the rotary scroll member from rotating on its own axis but allow the rotary scroll member to revolve relative to the fixed scroll member, and a housing structure configured to oppose and support the rotary scroll member and the rotating shaft. One of the rotary scroll member and the housing structure has a first surface, and the other of the rotary scroll member and the housing structure has a second surface facing the first surface. The rotation-stopping mechanism has a plurality of receiving portions provided on the first surface and rotation-stopping pins protruding from the second surface toward the receiving portions. The rotation of the rotary scroll member is prevented by the contact between the receiving portions and the corresponding rotation-stopping pins. Cylindrical retaining walls for holding the plurality of rotation-stopping pins are erected on the second surface. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of a scroll compressor illustrating an embodiment.

[0014] Figure 2 It means Figure 1 A perspective view of the rotation-stopping pin, retaining wall, and groove of the compression housing.

[0015] Figure 3 yes Figure 1 Rear view of the vortex component.

[0016] Figure 4 It means Figure 1 The front view of the compression shell structure.

[0017] Figure 5 It means Figure 1 Enlarged cross-sectional view of the rotation-stopping pin, retaining wall, and groove of the compression housing component.

[0018] Figure 6 This is a cross-sectional view showing another example of a scroll compressor. Detailed Implementation

[0019] The following is based on Figures 1 to 5 An embodiment of a scroll compressor will be described. This scroll compressor is used, for example, in a vehicle air conditioning system.

[0020] like Figure 1 As shown, the scroll compressor 10 has a housing 11, a rotating shaft 12 housed in the housing 11, an electric motor 20 that rotates the rotating shaft 12, and a compression mechanism 40 that is driven by the rotation of the rotating shaft 12.

[0021] The housing 11 is composed of a motor housing constituent body 13, a compression housing constituent body 15, a discharge housing constituent body 24, a fixed base plate 42 that fixes the fixed scroll 41, and a converter cover 36. The motor housing constituent body 13, the compression housing constituent body 15, the discharge housing constituent body 24, and the fixed base plate 42 that fixes the fixed scroll 41 are fixed to each other by a plurality of bolts 38.

[0022] The motor housing constituent body 13 has a plate-shaped end wall 13a, a cylindrical peripheral wall 13b that extends from an outer periphery of the end wall 13a, a suction port 13c that is provided to the peripheral wall 13b, and a boss portion 13d that is provided to the end wall 13a. An axial direction of the peripheral wall 13b coincides with an axial direction of the rotary shaft 12. First bolt insertion holes 13e are provided to the peripheral wall 13b. Each of the first bolt insertion holes 13e is open at a front end face of the peripheral wall 13b. The first bolt insertion holes 13e have internal threads.

[0023] The suction port 13c is provided in order to suck refrigerant into the inside of the housing 11. The suction port 13c is disposed to the peripheral wall 13b. The boss portion 13d that is cylindrical protrudes from an inner surface of the end wall 13a toward the inside of the housing 11. The front end face of the peripheral wall 13b is in contact with the compression housing constituent body 15.

[0024] The compression housing constituent body 15 is sandwiched between the front end face of the peripheral wall 13b and the fixed base plate 42 that fixes the fixed scroll 41. The compression housing constituent body 15 has a cylindrical shaft support portion 16 and a cylindrical chamber-forming peripheral wall portion 18 that extends from an outer peripheral edge of the shaft support portion 16. The second bolt insertion holes 18b that are open at a front end face 18a of the chamber-forming peripheral wall portion 18 are formed in the chamber-forming peripheral wall portion 18. The second bolt insertion holes 18b penetrate the chamber-forming peripheral wall portion 18.

[0025] The compression housing constituent body 15 has an insertion hole 16a through which the rotary shaft 12 is inserted at a central portion of the shaft support portion 16. The insertion hole 16a has a small-diameter hole 16b and a large-diameter hole 16c that has a larger diameter than the small-diameter hole 16b. The small-diameter hole 16b is disposed at a position closer to the end wall 13a than the large-diameter hole 16c.

[0026] As shown in FIG. 1, the compression housing constituent body 15 has a pair of the self-rotation prevention pins 17 that protrude from the pair of the opposing faces 15a. The self-rotation prevention pins 17 are disposed at positions that are apart from each other by a predetermined interval in the vicinity of the large-diameter hole 16c. Figure 2

[0027] Figure 1 ​​As shown, the motor housing constituent body 13 and the compression housing constituent body 15 define a motor chamber M in the housing 11. Thus, the scroll compressor 10 has the motor chamber M. The electric motor 20 is housed in the motor chamber M. Refrigerant is sucked into the motor chamber M, which is the inside of the housing 11, from an external refrigerant circuit, not shown, via the suction port 13c. Thus, the motor chamber M is a suction pressure region.

[0028] The electric motor 20 has a stator 21 and a rotor 22 disposed inside the stator 21. The rotor 22 rotates integrally with the rotary shaft 12. The stator 21 surrounds the rotor 22.

[0029] The first end portion of the rotary shaft 12 is inserted into the boss portion 13d. A bearing 14 is provided between the inner peripheral surface of the boss portion 13d and the peripheral surface of the first end portion of the rotary shaft 12. The first end portion of the rotary shaft 12 is supported to the motor housing constituent body 13 via the bearing 14.

[0030] The second end portion of the rotary shaft 12 is inserted through the insertion hole 16a. The end surface 12a of the second end portion of the rotary shaft 12 is located inside the shaft support portion 16. A bearing 19 is provided between the peripheral surface of the second end portion of the rotary shaft 12 and the inner peripheral surface of the small-diameter hole 16b of the compression housing constituent body 15. The rotary shaft 12 is rotatably supported to the compression housing constituent body 15 by the bearing 19.

[0031] The bearing 19 has an outer ring 19a pressed into the shaft support portion 16, an inner ring 19b that rotates integrally with the rotary shaft 12, and rolling elements 19c disposed between the inner peripheral surface of the outer ring 19a and the outer peripheral surface of the inner ring 19b. Thus, the bearing 19 for supporting the rotary shaft 12 is pressed into the insertion hole 16a. The bearing 19 is in contact with the inner peripheral surface of the compression housing constituent body 15 that defines the insertion hole 16a in a pressed state.

[0032] The discharge housing constituent body 24 has a chamber-forming recess 25, an oil separation chamber 26, a discharge port 27, and a discharge hole 28.

[0033] The discharge housing constituent body 24 has an end surface 24a facing the fixed base plate 42. A third bolt insertion hole 24b is formed in the discharge housing constituent body 24 so as to open at the end surface 24a. The third bolt insertion hole 24b penetrates the discharge housing constituent body 24.

[0034] The chamber-forming recess 25 is recessed from the end surface 24a of the discharge housing constituent body 24. A discharge chamber 30 is defined in a space surrounded by the chamber-forming recess 25 and the fixed base plate 42. Thus, the scroll compressor 10 has the discharge chamber 30.

[0035] The discharge port 27 is connected to an external refrigerant circuit not shown. The oil separation chamber 26 is connected to the discharge port 27. An oil separation cylinder 31 is provided in the oil separation chamber 26. A discharge hole 28 connects the discharge chamber 30 and the oil separation chamber 26.

[0036] The inverter cover 36 is attached to the end wall 13a of the motor housing constituent body 13. A space defined by the inverter cover 36 and the end wall 13a of the motor housing constituent body 13 houses an inverter device 37. The scroll compressor 10 has the inverter device 37. The inverter device 37 drives the electric motor 20.

[0037] The scroll compressor 10 has the fixed scroll 41 and the orbiting scroll 51 orbiting with respect to the fixed scroll 41. The compression mechanism 40 has the fixed scroll 41 and the orbiting scroll 51. The fixed scroll 41 and the orbiting scroll 51 are disposed on the side opposite to the motor chamber M with the shaft support portion 16 of the compression housing constituent body 15 interposed therebetween. The compression housing constituent body 15 faces the orbiting scroll 51 and supports the orbiting scroll 51.

[0038] The fixed scroll 41 has a fixed base plate 42, a fixed scroll wall 43 rising from the fixed base plate 42, a fixed peripheral wall 44, and a discharge hole 45.

[0039] The fourth bolt insertion hole 42b is formed in the fixed base plate 42. The fourth bolt insertion hole 42b penetrates the fixed base plate 42 in the thickness direction. The discharge hole 45 is disposed in the center of the fixed base plate 42. The discharge hole 45 is a circular hole. In addition, the discharge hole 45 penetrates the fixed base plate 42 in the thickness direction. The discharge valve mechanism 45a that opens and closes the discharge hole 45 is attached to the end face 42a of the fixed base plate 42 on the side opposite to the orbiting scroll 51.

[0040] The outer peripheral portion of the fixed base plate 42 is sandwiched by the front end face 18a of the chamber forming peripheral wall portion 18 of the compression housing constituent body 15 and the end face 24a of the discharge housing constituent body 24. The bolt 38 is inserted into the third bolt insertion hole 24b, the fourth bolt insertion hole 42b, the second bolt insertion hole 18b, and the first bolt insertion hole 13e, and the bolt 38 is screwed into the internal thread of the first bolt insertion hole 13e. As a result, the discharge housing constituent body 24, the fixed base plate 42, the compression housing constituent body 15, and the motor housing constituent body 13 are fixed to each other in the axial direction of the rotation shaft 12.

[0041] The fixed scroll wall 43 extends from the fixed base plate 42 toward the orbiting scroll 51. The cylindrical fixed peripheral wall 44 extends from the outer peripheral portion of the fixed base plate 42. The fixed peripheral wall 44 surrounds the fixed scroll wall 43. An introduction recess not shown is formed in the fixed peripheral wall 44.

[0042] The vortex component 51 has a vortex base plate 52, a vortex wall 53, a boss portion 54, and four storage portions 55.

[0043] The rotary base plate 52 is circular. The rotary base plate 52 is opposite to the fixed base plate 42. A rotary vortex wall 53 extends from the rotary base plate 52 toward the fixed base plate 42. The rotary vortex wall 53 engages with the fixed vortex wall 43. The rotary vortex wall 53 is located inside the fixed outer peripheral wall 44. A gap (not shown) is ensured between the front end face of the fixed vortex wall 43 and the rotary base plate 52, and a gap (not shown) is also ensured between the front end face of the rotary vortex wall 53 and the fixed base plate 42. A plurality of compression chambers 46 are defined by the engagement of the fixed vortex wall 43 and the rotary vortex wall 53. That is, the compression chambers 46 are formed by the engagement of the fixed vortex member 41 and the rotary vortex member 51.

[0044] A cylindrical boss 54 protrudes from the back surface 52a of the rotating base plate 52, opposite to the fixed base plate 42. The back surface 52a faces the opposing surface 15a of the compression housing component 15. The axial direction of the boss 54 is consistent with the axial direction of the rotation shaft 12.

[0045] like Figure 3 As shown, four storage portions 55 are formed on the back surface 52a of the rotary base plate 52, arranged around the boss portion 54. The four storage portions 55 are arranged at equal intervals in the circumferential direction of the rotation axis 12. Four recesses 55b are formed on the back surface 52a of the rotary base plate 52, and an annular ring member 55a is disposed inside each recess 55b. Each storage portion 55 is formed inside the ring member 55a. The outer peripheral surface of the ring member 55a contacts the inner peripheral surface of the recess 55b. A rotation-stopping pin 17 is inserted inside each storage portion 55, and the rotation-stopping pin 17 protrudes from the shaft support portion 16 of the compression housing component 15 toward the storage portion 55. Therefore, the rotation-stopping mechanism of the scroll compressor 10 has a plurality of storage portions 55 provided on the back surface 52a and a plurality of rotation-stopping pins 17 provided on the opposing surface 15a opposite to the back surface 52a and protruding toward the corresponding storage portion 55. The scroll member 51, which is one of the scroll member 51 and the compression housing structure 15, has a back surface 52a as a first surface. The compression housing structure 15, which is the other of the scroll member 51 and the compression housing structure 15, has an opposing surface 15a as a second surface.

[0046] like Figure 1As shown, an eccentric shaft 47 is arranged at the end surface 12a of the rotation shaft 12. The eccentric shaft 47 protrudes toward the orbiting scroll 51 from a position eccentric with respect to the axis L of the rotation shaft 12. The axis direction of the eccentric shaft 47 coincides with the axis direction of the rotation shaft 12. The eccentric shaft 47 is inserted into the boss portion 54. A bush 49 is fitted to the outer peripheral surface of the eccentric shaft 47. A balance weight 48 is integrated with the bush 49. The balance weight 48 is housed in the large-diameter hole 16c. The orbiting scroll 51 is supported to the eccentric shaft 47 via the bush 49 and the bearing 50. The orbiting scroll 51 is rotatable relative to the eccentric shaft 47.

[0047] The scroll compressor 10 is provided with an oil supply passage 39 connecting the oil separation chamber 26 and the large-diameter hole 16c. The oil supply passage 39 has a first end connected to the oil separation chamber 26 and a second end connected to the large-diameter hole 16c.

[0048] The oil supply passage 39 has a first passage 39a, a second passage 39b, and a third passage 39c. The first passage 39a is a passage provided to the discharge housing constituent body 24. The first end of the first passage 39a is connected to the oil separation chamber 26. The second end of the first passage 39a is located at the end surface 24a.

[0049] The second passage 39b is formed in the fixed scroll 41. The second passage 39b penetrates the fixed scroll 41 in the thickness direction.

[0050] The third passage 39c is formed in the opposing surface 15a of the compression housing constituent body 15. The third passage 39c extends in the radial direction of the shaft support portion 16 from the outer peripheral side of the shaft support portion 16 toward the inner peripheral surface.

[0051] The second end of the first passage 39a is connected to the first end of the second passage 39b. The second end of the second passage 39b is connected to the first end of the third passage 39c. The second end of the third passage 39c is open at the inner peripheral surface of the large-diameter hole 16c. The first passage 39a of the oil supply passage 39 is connected to the oil separation chamber 26. Therefore, the oil supply passage 39 is filled with the lubricating oil, and the lubricating oil is supplied to the inner peripheral surface of the large-diameter hole 16c.

[0052] In the scroll compressor 10 of the described structure, the rotation of the rotation shaft 12 is transmitted to the orbiting scroll 51 via the eccentric shaft 47, the bush 49, and the bearing 50. At this time, the rotation of the autorotation prevention pin 17 is prevented along the inner peripheral surface of the ring member 55a in the same direction as the orbiting direction of the orbiting scroll 51.

[0053] By the abutment of the front end portion 17b of the autorotation prevention pin 17 with each of the receiving portions 55, the orbiting scroll 51 orbits in a state in which the autorotation of the orbiting scroll 51 is prevented. The orbiting scroll 51 orbits while the orbiting scroll wall 53 is in contact with the fixed scroll wall 43 as the rotation shaft 12 rotates, and the volume of the compression chamber 46 decreases.

[0054] During one revolution of the gyratory scroll member 51, the rotation-stopping pin 17, which bears the torque acting on the gyratory scroll member 51, switches four times. At each switching moment, the rotation-stopping pin 17 abuts against the receiving part 55. At this time, the load is borne by the rotation-stopping pin 17.

[0055] The refrigerant drawn into the motor chamber M through the suction port 13c is then drawn into the outermost part of the compression chamber 46 via the inlet recess of the compression housing 15 and the fixed scroll member 41. The refrigerant drawn into the outermost part of the compression chamber 46 is compressed within the compression chamber 46 by the revolution of the swirling scroll member 51.

[0056] The refrigerant, compressed in the compression chamber 46, is discharged from the discharge port 45 through the discharge valve mechanism 45a into the discharge chamber 30. The refrigerant discharged into the discharge chamber 30 is discharged through the discharge port 28 into the oil separation chamber 26. The lubricating oil contained in the refrigerant discharged into the oil separation chamber 26 is separated from the refrigerant by the oil separation cylinder 31.

[0057] After the lubricating oil is separated, the refrigerant flows into the oil separator 31 and is discharged from the discharge port 27 to the external refrigerant circuit. The refrigerant discharged to the external refrigerant circuit flows back to the motor chamber M via the suction port 13c. On the other hand, the lubricating oil separated from the refrigerant by the oil separator 31 is supplied from the oil separator chamber 26, which is the discharge pressure area, to the large diameter orifice 16c via the oil supply passage 39. Therefore, the oil supply passage 39 connects the oil separator chamber 26, which discharges the refrigerant compressed by the compression chamber 46, to the large diameter orifice 16c, thereby supplying lubricating oil from the oil separator chamber 26 to the large diameter orifice 16c.

[0058] Next, the arrangement structure of the rotation-stopping pin 17 in the compression housing component 15 will be described.

[0059] like Figure 2 , Figure 4 and Figure 5 As shown, the compression housing assembly 15 includes a plurality of retaining walls 72 and a plurality of grooves 70. Since the structures of the plurality of grooves 70 are all identical, only one groove 70 will be described, and the descriptions of the other grooves 70 will be omitted. Similarly, since the structures of the plurality of retaining walls 72 are all identical, only one retaining wall 72 will be described, and the descriptions of the other retaining walls 72 will be omitted.

[0060] The groove 70 is recessed from the opposing surface 15a of the shaft support portion 16 along the axial direction of the rotation shaft 12. Multiple grooves 70 are arranged at equal intervals around the through hole 16a. The groove 70 opens towards the large-diameter hole 16c on the inner circumferential surface of the shaft support portion 16 that defines the through hole 16a. The compression housing assembly 15 is viewed from the opposing surface 15a as a front view. When the compression housing assembly 15 is viewed from the front, the groove 70 has a bottom surface 70a that is recessed relative to the opposing surface 15a in a direction away from the back surface 52a of the rotary base plate 52. The bottom surface 70a is a portion of the opposing surface 15a. That is, the opposing surface 15a includes the bottom surface 70a, which is a portion recessed in a direction away from the back surface 52a of the rotary base plate 52. The groove 70 has an inner wall surface 70b that connects the bottom surface 70a to the opposing surface 15a. Therefore, the groove 70 is defined by the bottom surface 70a, the inner wall surface 70b, and the outer peripheral surface of the retaining wall 72.

[0061] A cylindrical retaining wall 72 holds the base end 17a of the rotation-stopping pin 17. The retaining wall 72 is erected on the bottom surface 70a of the groove 70. The cylindrical retaining wall 72 is a retaining peripheral wall. The retaining wall 72 extends from a portion of the bottom surface 70a, i.e., the opposing surface 15a, toward the back surface 52a of the rotating base plate 52. A pin hole 71 is formed on the inner side of the retaining wall 72. The pin hole 71 is recessed from the front end face 72a of the retaining wall 72. For example, the pin hole 71 is cylindrical and has a circular cross-sectional shape. The front end face 72a of the retaining wall 72 is an annular surface surrounding the pin hole 71. For example, the outer peripheral surface of the retaining wall 72 has a circular cross-sectional shape.

[0062] A groove 70 is formed around the retaining wall 72. That is, the opposing surface 15a has a groove 70 formed around the retaining wall 72. This groove 70 separates the entire outer peripheral surface of the retaining wall 72 from the inner wall surface 70b.

[0063] The front end face 72a of the retaining wall 72 is at the same height as the opposing face 15a of the shaft support portion 16. The depth F1 of the groove 70 is defined as the distance from the opposing face 15a to the bottom surface 70a of the groove 70. The depth F2 of the retaining wall 72 is defined as the distance from the front end face 72a of the retaining wall 72 to the inner bottom surface 72b. The depth F1 of the groove 70 is the same as the depth F2 of the retaining wall 72.

[0064] The base end 17a of the rotation-stopping pin 17 is pressed into the pin hole 71. This pressing holds the base end 17a of the rotation-stopping pin 17 in the retaining wall 72. The end face of the base end 17a of the rotation-stopping pin 17 contacts the inner bottom surface 72b of the retaining wall 72. The dimension of the base end 17a of the rotation-stopping pin 17 is the same as the depth F2 of the retaining wall 72. The thickness of the retaining wall 72 is set to a value sufficient to prevent the base end 17a of the rotation-stopping pin 17 from dislodging from the retaining wall 72. The retaining wall 72 contacts and holds the rotation-stopping pin 17 throughout its entire circumference.

[0065] The portion of the self-rotation prevention pin 17 that is not held by the holding wall 72 is provided as a front end portion 17b. The front end portion 17b of the self-rotation prevention pin 17 is a portion that protrudes from the front end face 72a of the holding wall 72. The front end face 72a of the holding wall 72 is the same height as the facing surface 15a of the shaft support portion 16. Therefore, it can be said that the front end portion 17b of the self-rotation prevention pin 17 protrudes from the facing surface 15a of the shaft support portion 16. The front end portion 17b of the self-rotation prevention pin 17 protrudes toward the accommodation portion 55 and is inserted into the inside of the accommodation portion 55.

[0066] Next, the operation of the scroll compressor 10 will be described.

[0067] In the scroll compressor 10, the self-rotation prevention pin 17 that withstands the moment acting on the orbiting scroll 51 switches four times during one revolution of the orbiting scroll 51. At the time of this switching, the self-rotation prevention pin 17 comes into abutment with the accommodation portion 55. At this time, the load is received by each self-rotation prevention pin 17.

[0068] The cylindrical holding wall 72 that holds the base end portion 17a of the self-rotation prevention pin 17 is provided standing on the bottom face 70a of the groove 70, and the entire outer peripheral face of the holding wall 72 is separated from the inner wall face 70b. That is, the holding wall 72 is entirely surrounded by a space in the peripheral direction. Therefore, the self-rotation prevention pin 17 that has received the load is easily inclined together with the holding wall 72. As a result, compared with the case where the self-rotation prevention pin 17 is not inclined, the vibration and noise that occur due to the abutment of the self-rotation prevention pin 17 with the accommodation portion 55 are reduced.

[0069] According to the described embodiment, the following operational effects can be obtained.

[0070] (1) The cylindrical holding wall 72 holds the self-rotation prevention pin 17. The entire outer peripheral face of the holding wall 72 is separated from the inner wall face 70b. The holding wall 72 is not supported from the outer peripheral side, and therefore the rigidity of the holding wall 72 is the same in the peripheral direction. In addition, compared with the case where the self-rotation prevention pin 17 is pressed into the facing surface 15a without the holding wall 72 being provided, the rigidity of the portion that holds the self-rotation prevention pin 17 is reduced. Therefore, when the self-rotation prevention pin 17 receives the load from the orbiting scroll 51, the load can be received equally at any position in the peripheral direction of the holding wall 72, and the holding wall 72 is inclined to receive the load. As a result, the variation in the load received by the self-rotation prevention pin 17 can be made gentle, and the vibration and noise can be reduced.

[0071] (2) Sometimes, any one of the four rotation-preventing pins 17 is arranged deviated from the ideal position. The load that should be applied to the other three rotation-preventing pins 17 is applied to the deviated rotation-preventing pin 17, but the rotation-preventing pin 17 is easily tilted from the retaining wall 72 by being held by the retaining wall 72. Therefore, it is possible to reduce the vibration and noise generated when the rotation-preventing pin 17 comes into abutment with the housing portion 55.

[0072] (3) The depth Fl of the groove 70 is the same as the depth F2 of the retaining wall 72. For example, compared with the case where the depth Fl of the groove 70 is deeper than the depth F2 of the retaining wall 72, the rotation-preventing pin 17 is easily tilted from the retaining wall 72 when a load is applied to the rotation-preventing pin 17.

[0073] (4) By using the groove 70 to make the entire outer circumferential surface of the retaining wall 72 depart from the inner wall surface 70b, the rotation-preventing pin 17 is easily tilted from the retaining wall 72. Therefore, it is possible to reduce the vibration and noise generated when the housing portion 55 comes into abutment with the rotation-preventing pin 17. Therefore, it is not necessary to arrange the rotation-preventing pin 17 so as not to be deviated in position and / or to increase the number of the rotation-preventing pins 17 with high precision in order to reduce the vibration and noise, and it is possible to suppress an increase in manufacturing cost for implementing these.

[0074] (5) By using the groove 70 to make the entire outer circumferential surface of the retaining wall 72 depart from the inner wall surface 70b, it is possible to reduce the vibration and noise generated when the rotation-preventing pin 17 comes into abutment with the housing portion 55. The groove 70 is formed by cutting the shaft support portion 16, and therefore it is possible to achieve weight reduction of the compression housing constituent body 15.

[0075] (6) The groove 70 is provided to the shaft support portion 16 of the compression housing constituent body 15. Therefore, it is possible to absorb the deformation of the shaft support portion 16 generated when the outer ring 19a is pressed into the inside of the shaft support portion 16 by the groove 70. Therefore, it is possible to suppress the deformation of the shaft support portion 16.

[0076] (7) The third passage 39c of the oil supply passage 39 communicates with the large-diameter hole 16c. Also, lubricating oil is supplied from the oil supply passage 39 to the large-diameter hole 16c. The groove 70 communicates with the large-diameter hole 16c. Therefore, the lubricating oil supplied to the large-diameter hole 16c is supplied into the groove 70. As a result, it is possible to supply the lubricating oil in the groove 70 to the sliding portion of the rotation-preventing pin 17 and the housing portion 55, and therefore it is possible to lubricate the sliding portion.

[0077] (8) To make the rotation stop pin 17 move smoothly under load, it is considered to reduce the rigidity of the retaining part by using a cylindrical retaining part to hold the ring member 55a and by separating the outer peripheral surface of the retaining part from the surrounding area. When the retaining part of the ring member 55a and the retaining wall 72 are made to have the same thickness, the rigidity of the small-diameter retaining wall 72 is reduced. Therefore, in order to reduce the rigidity of the retaining part to the same level as the retaining wall 72, the thickness of the retaining part of the ring member 55a needs to be reduced. Therefore, by using the retaining wall 72 that holds the rotation stop pin 17, noise and vibration can be reduced through simple processing.

[0078] This embodiment can be implemented by modification as follows. This embodiment and the following modifications can be combined with each other within the scope of technical inconsistency.

[0079] Alternatively, the groove 70 may not be provided with an opening on the inner circumferential surface of the shaft support portion 16. In this case, the groove 70 is annular.

[0080] ○ For example Figure 6 As shown, the opposing surface 15a of the shaft support portion 16 in the compression housing component 15 can also be a first surface having a receiving portion 55. The rotation-stopping pin 17 can also protrude from the back surface 52a of the gyratory vortex member 51, which is a second surface, toward the receiving portion 55. Furthermore, a retaining wall 72 can be provided on the gyratory base plate 52 of the gyratory vortex member 51, and a groove 70 can also be further provided.

[0081] ○ It is also possible to make the depth F1 of the groove 70 different from the depth F2 of the retaining wall 72.

[0082] ○ The bearing 19 can also be fixed to the shaft support 16 by means other than pressing.

[0083] The third passage 39c of the oil supply passage 39 may also not be connected to the insertion hole 16a.

[0084] ○ The ring member 55a may also be absent. In this case, the recess 55b itself becomes the receiving part 55, and the front end 17b of the rotation stop pin 17 abuts against the inner circumferential surface of the recess 55b.

[0085] Alternatively, an oil reservoir can be provided inside the housing 11 to store the lubricating oil discharged from the oil separation chamber 26. Furthermore, the oil reservoir can be configured as a discharge pressure zone. The first end of the oil supply passage 39 can also be connected to this oil reservoir.

[0086] The number of self-rotation stop pin 17 and storage section 55 can also be changed.

[0087] Alternatively, instead of providing a groove 70 on the opposite surface 15a of the compression housing 15, a retaining wall 72 may be erected on the opposite surface 15a.

[0088] The scroll compressor 10 is driven by an electric motor 20, but can also be driven by power from an internal combustion engine.

[0089] The term "annular" as used in this specification can refer to any structure that is formed as a whole in the shape of a ring. The shape of "annular" includes, but is not limited to, a circle, an ellipse, and a polygon having an acute angle or a rounded corner. The term "cylindrical" can also refer to any structure having a cross-sectional shape, but not limited to, a circle, an ellipse, and a polygon having an acute angle or a rounded corner.

Claims

1. A scroll compressor, comprising: case; A rotating shaft, which is housed within the housing; Fixed scroll component; A swirling vortex component, configured to rotate relative to the fixed vortex component; A rotation-stopping mechanism, configured to prevent the gyratory scroll member from rotating while allowing it to revolve relative to the fixed scroll member; and The housing is configured to face and support the vortex member, and also to support the rotation axis. One of the swirling vortex component and the housing structure has a first surface, and the other of the swirling vortex component and the housing structure has a second surface opposite to the first surface. The rotation-stopping mechanism has multiple storage sections disposed on the first surface and multiple rotation-stopping pins protruding from the second surface toward the storage sections. The rotation of the vortex component is prevented by the abutment between the storage part and the corresponding rotation-stopping pin. On the second surface, cylindrical retaining walls are erected to hold the plurality of rotation-stopping pins. The second surface is recessed around the retaining wall in a direction away from the first surface, such that a groove is formed around the retaining wall.

2. The scroll compressor as described in claim 1, The depth from the front end face of the retaining wall to the inner bottom face of the retaining wall is the same as the depth of the groove.

3. The scroll compressor as described in claim 1 or 2, The housing component has an insertion hole for the rotating shaft to pass through. The fixed scroll member and the rotating scroll member mesh with each other to form a compression chamber, the volume of which decreases as the rotating shaft rotates. The scroll compressor also features: The pressure zone is discharged, which discharges the refrigerant compressed by the compression chamber; and An oil supply passage is configured to connect the discharge pressure region to the through hole, thereby supplying lubricating oil from the discharge pressure region to the through hole. The rotation-preventing pin is disposed on the housing component. The groove opens on the inner circumferential surface of the housing component that defines the through hole.

4. The scroll compressor as described in claim 3, It also includes a bearing configured to be pressed into the through hole and support the rotating shaft.

5. The scroll compressor as described in any one of claims 1 to 4, Each of the respective turning stop pins is pressed into the corresponding retaining wall.

6. The scroll compressor as described in claim 1, The second surface includes a bottom surface, which is a portion recessed in a direction away from the first surface. The groove has an inner wall surface that connects the bottom surface and a portion of the second surface other than the bottom surface. The groove is defined by the bottom surface, the inner wall surface, and the outer peripheral surface of the retaining wall.

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