A self-rotating scroll compressor

Abstract

The invention discloses a self-rotating scroll compressor, which relates to the technical field of compressors, including a scroll compressor structure and a driving motor, wherein the scroll compressor structure includes a compressor housing and an active scroll, a driven scroll, a transmission slip ring and an exhaust shaft arranged in the compressor housing, and the driving motor includes a motor housing and a driving shaft, a rotor and a stator arranged in the motor housing, the compressor housing is connected to the motor housing through a side end cover, the phase difference between the active scroll and the driven scroll is 180°, the rotor and the active scroll are respectively connected to the driving shaft, the rotor and the stator rotate relative to each other, the transmission slip ring is located between the active scroll and the driven scroll, the driven scroll is connected to the exhaust shaft, and the exhaust shaft is rotationally connected to the compressor housing. The invention can increase the operating speed of the compressor, reduce the volume of the compressor, and improve the working efficiency of the compressor.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to a self-rotating scroll compressor. Background Art

[0002] Scroll compressors have the advantages of simple structure, smooth operation, low noise, high mechanical efficiency and high volumetric efficiency, and are widely used in various fields such as industry and life. The moving and static scrolls of the scroll compressor are assembled with an orbital radius determined by an offset of 180°. The moving scroll is driven by a crankshaft with an eccentric radius as its orbital radius to achieve its orbital translation. During the movement of the moving scroll, it meshes with the static scroll to form several pairs of crescent-shaped closed working chambers with continuously changing volumes, which are the first (center chamber), the second, and the third compression chambers (intake chambers) from the inside to the outside; when the compressor is working, the volume of the compression chamber changes with the main shaft rotation angle. When the compression is completed, the second compression chamber is connected to the center chamber and the gas is discharged through the exhaust hole. The working fluid undergoes three processes in the crescent working chamber: suction, compression, and exhaust.

[0003] At present, there is a large imbalance when the moving scroll of the orbiting scroll compressor moves horizontally, which generates vibration and noise. The scroll compressor for automotive air conditioning needs to achieve small size, high pressure ratio, low noise, high efficiency and high performance indicators. The specific implementation methods include increasing the compressor speed and reducing the scroll imbalance. However, due to the limitations of the working mode of the orbiting scroll compressor, it is difficult to increase the speed and reduce the imbalance at the same time. Summary of the invention

[0004] The object of the present invention is to provide a self-rotating scroll compressor to solve the problems existing in the above-mentioned prior art, increase the operating speed of the compressor, reduce the size of the compressor, and improve the working efficiency of the compressor.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a self-rotating scroll compressor, comprising a scroll compressor structure and a drive motor, wherein the scroll compressor structure comprises a compressor housing and an active scroll plate, a driven scroll plate, a transmission slip ring and an exhaust shaft arranged in the compressor housing, wherein the drive motor comprises a motor housing and a drive shaft, a rotor and a stator arranged in the motor housing, wherein the compressor housing is connected to the motor housing through a side end cover, wherein a phase difference between the active scroll plate and the driven scroll plate is 180°, wherein the rotor and the active scroll plate are respectively connected to the drive shaft, wherein the rotor and the stator rotate relative to each other, wherein the transmission slip ring is located between the active scroll plate and the driven scroll plate, wherein the driven scroll plate is connected to the exhaust shaft, and wherein the exhaust shaft is rotationally connected to the compressor housing.

[0007] Preferably, the active scroll plate comprises a first disk bottom, a first volute, a first active friction portion, a second active friction portion, a first active portion, and a second active portion, the first volute, the first active friction portion, and the second active friction portion are all arranged on the first disk bottom, the first active friction portion and the second active friction portion are both located on the outside of the first volute, the first active friction portion and the second active friction portion are arranged opposite to each other, the first active portion is arranged on the first active friction portion, the second active portion is arranged on the second active friction portion, and the first active portion and the second active portion are arranged opposite to each other;

[0008] The driven scroll plate includes a second disk bottom, a second scroll tooth, a first driven friction portion, a second driven friction portion, a first driven portion and a second driven portion, the second scroll tooth, the first driven friction portion and the second driven friction portion are all arranged on the second disk bottom, an exhaust hole is arranged on the second disk bottom, the exhaust hole is connected to the exhaust shaft, the first driven friction portion and the second driven friction portion are both located on the outside of the second scroll tooth, the first driven friction portion and the second driven friction portion are arranged opposite to each other, the first driven portion is arranged on the first driven friction portion, the second driven portion is arranged on the second driven friction portion, and the first driven portion and the second driven portion are arranged opposite to each other.

[0009] Preferably, two first matching parts are provided at one end of the transmission slip ring, the two first matching parts are arranged opposite to each other, the two first matching parts are matched with the first active part and the second active part respectively, the two first matching parts divide the end surface of one end of the transmission slip ring into a first friction surface and a second friction surface, the first friction surface contacts the first active friction surface of the first active friction part, and the second friction surface contacts the second active friction surface of the second active friction part; two second matching parts are provided at the other end of the transmission slip ring, the two second matching parts are arranged opposite to each other, the two second matching parts are matched with the first driven part and the second driven part respectively, the two second matching parts divide the end surface of the other end of the transmission slip ring into a third friction surface and a fourth friction surface, the third friction surface contacts the first driven friction surface of the first driven friction part, and the fourth friction surface contacts the second driven friction surface of the second driven friction part.

[0010] Preferably, the first active portion and the second active portion are bosses, and the first matching portion is a slide groove; or, the first active portion and the second active portion are slide grooves, and the first matching portion is a boss.

[0011] Preferably, the first driven portion and the second driven portion are bosses, and the second matching portion is a slide groove; or, the first driven portion and the second driven portion are slide grooves, and the second matching portion is a boss.

[0012] Preferably, a motor end cover is further provided at the lower part of the motor housing, a compressor cavity is provided between the compressor housing and the side end cover, a motor cavity is provided between the side end cover, the motor housing and the motor end cover, an air inlet is provided on the motor housing, and a plurality of air vents are provided on the side end cover, and the air vents are used to connect the motor cavity and the compressor cavity;

[0013] One end of the drive shaft is rotatably connected to the side end cover, the other end of the drive shaft is rotatably connected to the motor end cover, and a locking nut is provided at the other end of the drive shaft.

[0014] Preferably, the scroll compressor structure also includes a compressor outlet end cover, which is provided with an exhaust port, and the compressor outlet end cover is connected to the compressor housing, and an exhaust cavity is formed between the compressor outlet end cover and the compressor housing, and the exhaust shaft is hollow inside, one end of the exhaust shaft can be connected to the exhaust cavity, and the other end of the exhaust shaft can be connected to the compressor cavity; a check device is provided in the exhaust cavity, and the check device is located at one end of the exhaust shaft.

[0015] Preferably, a plurality of transmission slip ring vents are provided on the side wall of the transmission slip ring, and the transmission slip ring vents are used to connect the compressor cavity and the exhaust shaft.

[0016] Preferably, there is a back disk gap between the back of the driven scroll disk and the compressor housing.

[0017] Preferably, the surface of the active scroll, the surface of the driven scroll and the surface of the transmission slip ring are all provided with a self-lubricating coating.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] The driving shaft of the present invention drives the active scroll to rotate, the active scroll drives the transmission slip ring to rotate, and the transmission slip ring drives the driven scroll to rotate. The transmission slip ring limits the relative speed of the active scroll and the driven scroll to always be zero under various working conditions, so as to achieve a fixed relative phase difference between the active scroll and the driven scroll. The active scroll and the driven scroll of the present invention are both self-rotating scrolls, which reduces the imbalance generated by the operation of the scroll and reduces the vibration and noise generated by the operation of the compressor. At the same time, the rotating parts in the entire shaft system generate a small imbalance, so that the scroll compressor can operate at a high operating speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a cross-sectional view of a self-rotating scroll compressor of the present invention;

[0022] Figure 2 It is an external schematic diagram of the self-rotating scroll compressor of the present invention;

[0023] Figure 3 It is a schematic diagram of the active scroll of the present invention;

[0024] Figure 4 It is a schematic diagram of the driven scroll of the present invention;

[0025] Figure 5 It is a schematic diagram of the transmission slip ring of the present invention;

[0026] Figure 6 It is a schematic diagram of the side end cover of the present invention;

[0027] Figure 7 It is a schematic diagram of the back plate gap of the present invention;

[0028] Figure 8 It is a front view of the non-return device of the present invention;

[0029] Fig. 9 It is a side view of the non-return device of the present invention;

[0030] Among them: 101-controller housing, 102-controller cover, 2-motor end cover, 3-motor housing, 4-side end cover, 401-bearing seat, 402-vent, 403-side end cover sealing groove, 5-compressor housing, 501-check device, 61-stator, 62-rotor, 63-drive shaft, 631-transmission key, 632-second bearing, 633-third bearing, 634-locking nut, 635-second skeleton sealing ring, 7-active scroll plate, 701-first active part, 702-first active friction surface, 703-second active part, 704-second active friction surface, 705-active Scroll plate sealing groove, 8-transmission slip ring, 801-first matching part, 802-second matching part, 803-first friction surface, 804-second friction surface, 805-third friction surface, 806-fourth friction surface, 807-transmission slip ring vent, 9-driven scroll plate, 901-first driven part, 902-first driven friction surface, 903-second driven part, 904-second driven friction surface, 905-driven scroll plate sealing groove, 10-exhaust shaft, 1001-first bearing, 1002-first skeleton sealing ring, 11-compressor outlet end cover, a-low-pressure chamber, b-back disc gap, c-high-pressure chamber. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The object of the present invention is to provide a self-rotating scroll compressor to solve the problems existing in the above-mentioned prior art, increase the operating speed of the compressor, reduce the size of the compressor, and improve the working efficiency of the compressor.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1 to 9As shown: This embodiment provides a self-rotating scroll compressor, including a scroll compressor structure and a driving motor. The scroll compressor structure includes a compressor housing 5 and an active scroll 7, a driven scroll 9, a transmission slip ring 8 and an exhaust shaft 10 arranged in the compressor housing 5. The driving motor includes a motor housing 3 and a driving shaft 63, a rotor 62 and a stator 61 arranged in the motor housing 3. The compressor housing 5 is connected to the motor housing 3 through a side end cover 4. There is a compression cavity between the active scroll 7 and the driven scroll 9. The active scroll 7 and the driven scroll 9 rotate around their respective central rotating axes. There is a fixed eccentricity between the central rotating axis of the active scroll 7 and the central rotating axis of the driven scroll 9. The eccentricity is the designed rotation radius of the active scroll 7 and the driven scroll 9. The active scroll 7 drives the driven scroll 9 to rotate at the same speed through the transmission slip ring 8. The phase difference between the active scroll 7 and the driven scroll 9 is always maintained at 180°. The rotor 62 and the active scroll 7 are respectively connected to the drive shaft 63. The rotor 62, the active scroll 7 and the drive shaft 63 are coaxially arranged. The active scroll 7 and the drive shaft 63 are connected through a transmission key 631. The rotor 62 and the stator 61 rotate relative to each other. The transmission slip ring 8 is located between the active scroll 7 and the driven scroll 9. The driven scroll 9 is connected to the exhaust shaft 10 through a fastener. The exhaust shaft 10 is rotatably connected to the compressor housing 5 through the first bearing 1001. The first bearing 1001 is a deep groove ball bearing. A first skeleton sealing ring 1002 is arranged between the end face of the first bearing 1001 and the compressor housing 5.

[0035] Specifically, in the present embodiment, the active scroll plate 7 includes a first disk bottom, a first scroll tooth, a first active friction portion, a second active friction portion, a first active portion 701 and a second active portion 703. The first scroll tooth, the first active friction portion and the second active friction portion are all arranged on the first disk bottom. The tooth top of the first scroll tooth is provided with an active scroll plate sealing groove 705 extending along its profile line. The active scroll plate sealing groove 705 accommodates a sealing strip, which contacts the second disk bottom of the driven scroll plate 9. The first active friction portion and the second active friction portion are both located on the outside of the first scroll tooth. The first active friction portion and the second active friction portion are arranged opposite to each other. The first active portion 701 is arranged on the first active friction portion, the second active portion 703 is arranged on the second active friction portion, and the first active portion 701 and the second active portion 703 are arranged opposite to each other.

[0036] In this embodiment, the driven scroll 9 includes a second disk bottom, a second scroll tooth, a first driven friction portion, a second driven friction portion, a first driven portion 901 and a second driven portion 903. The second scroll tooth, the first driven friction portion and the second driven friction portion are all arranged on the second disk bottom. An exhaust hole is arranged on the second disk bottom, and the exhaust hole is connected to the exhaust shaft 10. In the scroll compressor structure, the compressed gas enters the exhaust shaft 10 through the exhaust hole and is discharged. The tooth top of the second scroll tooth is provided with a driven scroll sealing groove 905 extending along its profile line. The driven scroll sealing groove 905 accommodates a sealing strip, and the sealing strip contacts the first disk bottom of the active scroll 7. The first driven friction portion and the second driven friction portion are both located on the outside of the second scroll tooth. The first driven friction portion and the second driven friction portion are arranged oppositely. The first driven portion 901 is arranged on the first driven friction portion, and the second driven portion 903 is arranged on the second driven friction portion. The first driven portion 901 and the second driven portion 903 are arranged oppositely.

[0037] In this embodiment, the first volute of the active scroll 7 and the second volute of the driven scroll 9 both adopt a multi-dimensional conjugate curved surface volute structure.

[0038] In this embodiment, one end of the transmission slip ring 8 is provided with two first matching parts 801, the two first matching parts 801 are arranged opposite to each other, the two first matching parts 801 are matched with the first active part 701 and the second active part 703 respectively and cooperate in transmission, the two first matching parts 801 divide the end surface of one end of the transmission slip ring 8 into a first friction surface 803 and a second friction surface 804, the first friction surface 803 contacts the first active friction surface 702 of the first active friction part, and the second friction surface 804 contacts the second active friction surface 704 of the second active friction part; the other end of the transmission slip ring 8 is provided with two second matching parts 802, The two second matching parts 802 are arranged opposite to each other, and the two second matching parts 802 are matched with the first driven part 901 and the second driven part 903 respectively and cooperate in transmission. The two second matching parts 802 divide the end surface of the other end of the transmission slip ring 8 into a third friction surface 805 and a fourth friction surface 806. The third friction surface 805 contacts the first driven friction surface 902 of the first driven friction part, and the fourth friction surface 806 contacts the second driven friction surface 904 of the second driven friction part; a plurality of transmission slip ring vents 807 are opened on the side wall of the transmission slip ring 8, and the transmission slip ring vents 807 are used to connect the compressor cavity and the exhaust shaft 10.

[0039] In this embodiment, the first active part 701 and the second active part 703 are bosses, the first matching part 801 is a slide groove, the first active part 701 and the second active part 703 slide in the corresponding first matching part 801 respectively, and the first active part 701 and the second active part 703 respectively cooperate with the corresponding first matching part 801 for transmission, so that the transmission slip ring 8 translates and rotates simultaneously in the direction of the first active part 701 or the second active part 703-first matching part 801; the first driven part 901 and the second driven part 903 are bosses, and the second matching part 802 is a slide groove, the first driven part 901 and the second driven part 903 slide in the corresponding second matching part 802 respectively, and the first driven part 901 and the second driven part 903 respectively cooperate with the corresponding second matching part 802 for transmission, so that the transmission slip ring 8 translates and rotates simultaneously in the direction of the first driven part 901 or the second driven part 903-second matching part 802, driving the transmission slip ring 8 to rotate around the rotation axis with an eccentric distance from the active scroll 7. The transmission slip ring 8 limits the relative rotation speed of the active scroll 7 and the driven scroll 9 to be always zero under various working conditions, so as to achieve a fixed relative phase difference between the active scroll 7 and the driven scroll 9.

[0040] In this embodiment, the surfaces of the active scroll 7, the driven scroll 9 and the transmission slip ring 8 are all provided with self-lubricating coatings, so as to realize oil-free self-lubrication of the whole machine and solve the problem of miscibility between lubricant and working fluid.

[0041] In this embodiment, a motor end cover 2 is also provided at the lower part of the motor housing 3, a compressor cavity is formed between the compressor housing 5 and the side end cover 4, a motor cavity is formed between the side end cover 4, the motor housing 3 and the motor end cover 2, and the motor cavity also serves as an air intake cavity. An air intake hole is provided at the lower position of the motor housing 3, and a plurality of air vents 402 are provided on the side end cover 4. The air vents 402 are used to connect the motor cavity and the compressor cavity. A bearing seat 401 matching the second bearing 632 is provided at the center of the side end cover 4; one end of the drive shaft 63 is rotatably connected to the side end cover 4 through the second bearing 632, and the other end of the drive shaft 63 is rotatably connected to the motor end cover 2 through the third bearing 633. Both the second bearing 632 and the third bearing 633 are deep groove ball bearings. A locking nut 634 is threadedly connected to the other end of the drive shaft 63, and a second skeleton sealing ring 635 is provided between the locking nut 634 and the third bearing 633.

[0042] In this embodiment, a controller housing 101 and a controller cover 102 are arranged below the motor end cover 2, the other end of the drive shaft 63 and the locking nut 634 are located between the motor end cover 2 and the controller housing 101, and the motor controller is placed between the controller housing 101 and the controller cover 102.

[0043] In this embodiment, the scroll compressor structure also includes a compressor outlet end cover 11, which is provided with an exhaust port. The compressor outlet end cover 11 is connected to the compressor housing 5, and an exhaust cavity is formed between the compressor outlet end cover 11 and the compressor housing 5. The exhaust shaft 10 is hollow inside, one end of the exhaust shaft 10 can be connected to the exhaust cavity, and the other end of the exhaust shaft 10 can be connected to the compressor cavity; a check device 501 is provided in the exhaust cavity, and the check device 501 is located at one end of the exhaust shaft 10. The check device 501 is a prior art.

[0044] In this embodiment, the air intake cavity, the compression cavity and the exhaust cavity form a working cavity.

[0045] In this embodiment, the transmission slip ring 8 and the driven scroll 9 are low-pressure chamber a, and the exhaust shaft 10 is inside a high-pressure chamber c. According to the operating conditions of different systems, the actual operating pressure of the compressor has certain differences. For example, when the cooling medium is R134a, the pressure of the low-pressure chamber a is 0.2MPa, and the pressure of the high-pressure chamber c is 1.5MPa. In order to prevent the driven scroll 9 from being subjected to excessive axial load, which will greatly reduce the life of the first bearing 1001 or even damage it, the back of the driven scroll 9 adopts a micro-back disc gap technology, that is, there is a gap between the back of the driven scroll 9 and the compressor housing 5. The back-disk gap b has certain differences in the actual operating pressure of the compressor according to the operating conditions of different systems. It is necessary to adjust the size of the back-disk gap b according to the pressures of the high-pressure chamber c and the low-pressure chamber a. For example, when the cooling medium is R134a, the size of the back-disk gap b is 0.5 mm, and the average pressure in the back-disk gap b is 0.8 MPa. While controlling the leakage amount, this embodiment forms a back-disk gap b between the back of the driven scroll 9 and the compressor housing 5, thereby controlling the axial force of the driven scroll 9 to avoid reducing the service life of the first bearing 1001 and causing damage.

[0046] In this embodiment, the active scroll 7 and the driven scroll 9 are connected and driven by the transmission slip ring 8. The active scroll 7 and the driven scroll 9 rotate at the same speed around their respective rotation axes, and the distance between the two axes is the designed eccentricity of the compressor. The driving shaft 63 drives the active scroll 7 to rotate, the active scroll 7 drives the transmission slip ring 8 to rotate, and the transmission slip ring 8 drives the driven scroll 9 to rotate.

[0047] In this embodiment, the compressor outlet end cover 11, the compressor housing 5, the side end cover 4 and the motor housing 3 are detachably connected by bolts, and the motor housing 3, the motor end cover 2, the controller housing 101 and the controller cover 102 are detachably connected by bolts.

[0048] In this embodiment, the pressure of the cooling medium in the vehicle air-conditioning system is relatively high, so sealing strips are arranged between the side end cover 4 and the compressor housing 5, between the side end cover 4 and the motor housing 3, and between the motor housing 3 and the motor end cover 2. For example, a side end cover sealing groove 403 is opened on the side end cover 4, and a motor end cover 2 sealing groove is opened on the motor end cover 2. The sealing strips are placed in the side end cover sealing groove 403 and the motor end cover 2 sealing groove. By arranging the sealing strips, the problem of leakage of the working medium when the compressor is working can be effectively solved.

[0049] When the self-rotating scroll compressor of this embodiment is working, the active scroll 7 and the driven scroll 9 rotate around their respective central rotation axes at the same speed, and there is a fixed eccentricity between the central rotation axis of the active scroll 7 and the central rotation axis of the driven scroll 9. The relative motion between the transmission slip ring 8 and the active scroll 7 and the driven scroll 9 is a linear translation in the direction of the first active part 701 or the second active part 703-first matching part 801, and the entrained motion of the transmission slip ring 8 is the fixed rotation of the active scroll 7, so the absolute motion of the transmission slip ring 8 is the composite motion of the relative motion and the entrained motion. When the active scroll 7 and the driven scroll 9 rotate at the same speed and with a fixed eccentricity, one scroll (active scroll 7) is taken as the reference scroll, and the relative angular velocity of the other scroll (driven scroll 9) is always zero, while the direction of the eccentricity keeps changing, that is, the reference scroll (active scroll 7) is fixed and the other scroll (driven scroll 9) translates around the fixed eccentricity, which is the same as the movement of an orbital scroll compressor.

[0050] The self-rotating scroll compressor of this embodiment adopts a working fluid cooling drive motor. The working fluid is introduced through the air inlet hole set on the motor housing 3, enters the motor cavity to absorb heat, and then enters the compressor cavity through the air vent 402 on the side end cover 4, and then enters the scroll compressor working cavity through the transmission slip ring air vent 807 on the transmission slip ring 8. After being compressed by the scroll compressor structure, it is discharged from the exhaust shaft 10. The check device 501 set on the compressor housing 5 prevents the working fluid from flowing back due to pressure pulsation during the compression process.

[0051] The self-rotating scroll compressor of this embodiment does not require a dynamic balancing weight, breaks through the speed limit, reduces the displacement of the compressor under a certain mass flow rate, and reduces the volume of the whole machine; compared with the traditional orbiting scroll compressor, the aerodynamic loss inside the working chamber is lower, especially the compression chamber is a low-momentum compression process, and the exhaust chamber has a certain clearance volume, the exhaust throttling loss is smaller, the isentropic compression efficiency and volumetric efficiency are higher, the operating speed of the compressor is increased, and the working efficiency of the compressor is improved.

[0052] The active scroll 7 and the driven scroll 9 of the present invention are both self-rotating scrolls, which reduces the unbalance generated by the operation of the scrolls, and reduces the vibration and noise generated by the operation of the compressor. At the same time, the unbalance generated by the rotating parts in the entire shaft system is small, so that the scroll compressor can operate at a high operating speed. Under a certain mass flow rate, increasing the design speed of the scroll compressor can shorten the design vortex profile on the scroll, thereby reducing the radius of the scroll (active scroll 7 and driven scroll 9) and reducing the overall volume of the scroll compressor.

[0053] Compared with the orbital scroll compressor, the self-rotating scroll compressor of the present invention has the scroll tooth walls on both sides of a compression chamber moving when the self-rotating scroll compressor of the present invention is working, which can reduce the friction loss between the working fluid and the compression chamber during operation and improve the working efficiency of the scroll compressor.

[0054] The present invention adopts a centrally placed transmission slip ring 8, that is, the transmission slip ring 8 is located between the active scroll plate 7 and the driven scroll plate 9, which effectively improves the stability of the transmission slip ring 8 during high-speed operation and also improves the structural durability of the transmission slip ring 8. At the same time, the transmission slip ring 8 also allows the active scroll plate 7 and the driven scroll plate 9 to maintain a reasonable axial gap, preventing the tooth tops and disk bottoms of the active scroll plate 7 and the driven scroll plate 9 from colliding with each other during operation, causing the scroll teeth to deform.

[0055] In the present invention, an air inlet hole is provided at the lower position of the motor housing 3, which can effectively cool the motor without the need for other cooling devices, significantly reducing the motor volume and system complexity, and improving the working reliability of the motor.

[0056] The present invention adopts a self-lubricating coating, which can effectively lubricate the active scroll 7, the driven scroll 9 and the transmission slip ring 8, while reducing the meshing clearance between the active scroll 7 and the driven scroll 9, reducing leakage and improving compression efficiency.

[0057] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A self-rotating scroll compressor, characterized in that: The invention comprises a scroll compressor structure and a driving motor, wherein the scroll compressor structure comprises a compressor housing and an active scroll plate, a driven scroll plate, a transmission slip ring and an exhaust shaft arranged in the compressor housing, wherein the driving motor comprises a motor housing and a driving shaft, a rotor and a stator arranged in the motor housing, wherein the compressor housing is connected to the motor housing through a side end cover, wherein a phase difference between the active scroll plate and the driven scroll plate is 180°, wherein the rotor and the active scroll plate are respectively connected to the driving shaft, wherein the rotor and the stator rotate relative to each other, wherein the transmission slip ring is located between the active scroll plate and the driven scroll plate, wherein the driven scroll plate is connected to the exhaust shaft, and wherein the exhaust shaft is rotationally connected to the compressor housing; The active scroll plate comprises a first disk bottom, a first volute, a first active friction portion, a second active friction portion, a first active portion and a second active portion, the first volute, the first active friction portion and the second active friction portion are all arranged on the first disk bottom, the first active friction portion and the second active friction portion are both located on the outside of the first volute, the first active friction portion and the second active friction portion are arranged opposite to each other, the first active portion is arranged on the first active friction portion, the second active portion is arranged on the second active friction portion, and the first active portion and the second active portion are arranged opposite to each other; The driven scroll comprises a second disk bottom, a second volute, a first driven friction portion, a second driven friction portion, a first driven portion and a second driven portion, the second volute, the first driven friction portion and the second driven friction portion are all arranged on the second disk bottom, an exhaust hole is arranged on the second disk bottom, the exhaust hole is communicated with the exhaust shaft, the first driven friction portion and the second driven friction portion are both located on the outside of the second volute, the first driven friction portion and the second driven friction portion are arranged oppositely, the first driven portion is arranged on the first driven friction portion, the second driven portion is arranged on the second driven friction portion, and the first driven portion and the second driven portion are arranged oppositely; One end of the transmission slip ring is provided with two first matching parts, the two first matching parts are arranged opposite to each other, the two first matching parts are matched with the first active part and the second active part respectively, the two first matching parts divide the end surface of one end of the transmission slip ring into a first friction surface and a second friction surface, the first friction surface is in contact with the first active friction surface of the first active friction part, and the second friction surface is in contact with the second active friction surface of the second active friction part; the other end of the transmission slip ring is provided with two second matching parts, the two second matching parts are arranged opposite to each other, the two second matching parts are matched with the first driven part and the second driven part respectively, the two second matching parts divide the end surface of the other end of the transmission slip ring into a third friction surface and a fourth friction surface, the third friction surface is in contact with the first driven friction surface of the first driven friction part, and the fourth friction surface is in contact with the second driven friction surface of the second driven friction part; A motor end cover is also provided at the lower part of the motor housing, a compressor cavity is provided between the compressor housing and the side end cover, a motor cavity is provided between the side end cover, the motor housing and the motor end cover, an air inlet is provided on the motor housing, and a plurality of air vents are provided on the side end cover, and the air vents are used to connect the motor cavity and the compressor cavity; A plurality of transmission slip ring vents are provided on the side wall of the transmission slip ring, and the transmission slip ring vents are used to connect the compressor cavity and the exhaust shaft.

2. The self-rotating scroll compressor according to claim 1, characterized in that: The first active portion and the second active portion are bosses, and the first matching portion is a slide groove; or the first active portion and the second active portion are slide grooves, and the first matching portion is a boss.

3. The self-rotating scroll compressor according to claim 1, characterized in that: The first driven portion and the second driven portion are bosses, and the second matching portion is a slide groove; or the first driven portion and the second driven portion are slide grooves, and the second matching portion is a boss.

4. The self-rotating scroll compressor according to claim 1, characterized in that: One end of the drive shaft is rotatably connected to the side end cover, the other end of the drive shaft is rotatably connected to the motor end cover, and a locking nut is provided at the other end of the drive shaft.

5. The self-rotating scroll compressor according to claim 4, characterized in that: The scroll compressor structure also includes a compressor outlet end cover, which is provided with an exhaust port, and is connected to the compressor housing. An exhaust cavity is formed between the compressor outlet end cover and the compressor housing. The exhaust shaft is hollow inside, one end of the exhaust shaft can be connected to the exhaust cavity, and the other end of the exhaust shaft can be connected to the compressor cavity; a check device is provided in the exhaust cavity, and the check device is located at one end of the exhaust shaft.

6. The self-rotating scroll compressor according to claim 1, characterized in that: A back disk gap exists between the back of the driven scroll disk and the compressor housing.

7. The self-rotating scroll compressor according to claim 1, characterized in that: The surface of the active scroll, the surface of the driven scroll and the surface of the transmission slip ring are all provided with a self-lubricating coating.

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