SELF-ROTATING SCROLL COMPRESSOR

Provided is a self-rotating scroll compressor, relating to the technical field of compressors, and includes a scroll compressor structure and a driving motor. The scroll compressor structure includes a compressor housing, and a driving scroll, a driven scroll, a transmission slip ring, and an exhaust shaft that are arranged in the compressor housing; the driving motor includes a motor housing, and a driving shaft, a rotor, and a stator that are arranged in the motor housing; the compressor housing is connected with the motor housing through a side end cover; a phase difference between the driving scroll and the driven scroll is 180°; the rotor and the driving 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 driving scroll and the driven scroll; the driven scroll is connected to the exhaust shaft rotatably connected to the compressor housing. According to the self-rotating scroll compressor, it can increase the working rotation speed of the compressor, reduce the volume of the compressor, and improve the working efficiency of the compressor.

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Description
TECHNICAL FIELD

The present disclosure relates to the technical field of compressors, and in particular, to a self-rotating scroll compressor.

BACKGROUND

The scroll compressor has the advantages of simple structure, stable operation, low noise, high mechanical efficiency, and high volumetric efficiency and so on, and is widely used in industry field and life field and so on. Dynamic scroll and static scroll of the scroll compressor are assembled based on a revolution radius determined by a difference of 180° contraposition and bias. The dynamic scroll is driven by a crankshaft with an eccentric radius as its revolution radius to realize its revolution and translation. During the movement, the dynamic scroll is meshed with the static scroll to form several pairs of crescent closed working cavities with continuously changing volumes, respectively first (a central cavity), second and third compression cavities (air suction cavities) from inside to outside. When the compressor works, the volume of the compression cavity changes with a spindle rotation angle. When the compression is finished, the second compression cavity is in communication with the central cavity, and gas is exhausted through an exhaust hole. The working medium is subjected to three processes of air suction, compression and exhaust in the crescent closed working cavities.

At present, there is a relatively large amount of unbalance when a dynamic scroll of a revolving scroll compressor makes a motion of translation, thus generating vibration and noise. A vehicle air-conditioner scroll compressor needs to implement performance indexes of small volume, high pressure ratio, low noise, and high efficiency and so on, and specific implementations include improving a rotation speed of the compressor and reducing the amount of unbalance of the scroll. However, due to a working manner restriction of the revolving scroll compressor, it is difficult to reduce the amount of unbalance of the scroll while improving the rotation speed of the compressor.

SUMMARY

The purpose of the present disclosure is to provide a self-rotating scroll compressor, so as to solve the problems in the above-mentioned prior art, thereby increasing the working rotation speed of the compressor, reducing the volume of the compressor, and improving the working efficiency of the compressor.

In order to achieve the above-mentioned purpose, the present disclosure provides the following solutions.

The present disclosure provides a self-rotating scroll compressor, including a scroll compressor structure and a driving motor. The scroll compressor structure includes a compressor housing, and a driving scroll, a driven scroll, a transmission slip ring, and an exhaust shaft that are arranged in the compressor housing. The driving motor includes a motor housing, and a driving shaft, a rotor, and a stator that are arranged in the motor housing. The compressor housing is connected with the motor housing by means of a side end cover. A phase difference between the driving scroll and the driven scroll is 180°. The rotor and the driving scroll are connected with the driving shaft, respectively. The rotor and the stator rotate relative to each other. The transmission slip ring is located between the driving scroll and the driven scroll, The driven scroll is connected to the exhaust shaft. The exhaust shaft is rotatably connected to the compressor housing.

In an embodiment, the driving scroll includes a first plate bottom, a first scroll tooth, a first driving friction part, a second driving friction part, a first driving part and a second driving part. The first scroll tooth, the first driving friction part and the second driving friction part are all arranged on the first plate bottom. The first driving friction part and the second driving friction part are both located on an outer side of the first scroll tooth. The first driving friction part and the second driving friction part are arranged oppositely. The first driving part is arranged on the first driving friction part. The second driving part is arranged on the second driving friction part. The first driving friction part and the second driving friction part are arranged oppositely.

The driven scroll includes a second plate bottom, a second scroll tooth, a first driven friction part, a second driven friction part, a first driven part and a second driven part. The second scroll tooth, the first driven friction part and the second driven friction part are all arranged on the second plate bottom, an exhaust hole is formed in the second scroll bottom. The exhaust hole is in communication with the exhaust shaft. The first driven friction part and the second driven friction part are both located on an outer side of the second scroll tooth. The first driven friction part and the second driven friction part are arranged oppositely, The first driven part is arranged on the first driven friction part. The second driven part is arranged on the second driven friction part. The first driven part and the second driven part are arranged oppositely.

In an embodiment, two first fitting parts are arranged at one end of the transmission slip ring. The two first fitting parts are arranged oppositely. The two first fitting parts are in fit with the first driving part and the second driving part, respectively. An end surface of one end of the transmission slip ring is divided by means of the two first fitting parts into a first friction surface and a second friction surface. The first friction surface is in contact with a first driving friction surface of the first driving friction part. The second friction surface is in contact with a second driving friction surface of the second driving friction part. Two second fitting parts are arranged at an other end of the transmission slip ring. The two second fitting parts are arranged oppositely. The two second fitting parts are in fit with the first driven part and the second driven part, respectively. An end surface of the other end of the transmission slip ring is divided by means of the two second fitting parts into a third friction surface and a fourth friction surface. The third friction surface is in contact with a first driven friction surface of the first driven friction part. The fourth friction surface is in contact with a second driven friction surface of the second driven friction part.

In an embodiment, the first driving part and the second driving part are bosses, and the first fitting part is a sliding slot. Alternatively, the first driving part and the second driving part are sliding slots, and the first fitting part is a boss.

In an embodiment, the first driven part and the second driven part are bosses, and the second fitting part is a sliding slot. Alternatively, the first driven part and the second driven part are sliding slots, and the second fitting part is a boss.

In an embodiment, a motor end cover is further arranged at a lower part of the motor housing. A compressor cavity is arranged between the compressor housing and the side end cover. A motor cavity is arranged among the side end cover, the motor housing, and the motor end cover. An inlet hole is arranged in the motor housing. Multiple vent holes are arranged in the side end cover. The vent hole is configured to communicate the motor cavity with the compressor cavity.

One end of the driving shaft is rotatably connected to the side end cover, an other end of the driving shaft is rotatably connected to the motor end cover, and locking nuts are arranged at the other end of the driving shaft.

In an embodiment, the scroll compressor structure further includes a compressor outlet end cover. An exhaust port is arranged in the compressor outlet end cover. The compressor outlet end cover is connected to the compressor housing. An exhaust cavity is formed between the compressor outlet end cover and the compressor housing. An exterior of the exhaust shaft is arranged hollowly. One end of the exhaust shaft is capable of being in communication with the exhaust cavity, and an other end of the exhaust shaft is capable of being in communication with the compressor cavity. A non-return device is arranged in the exhaust cavity. The non-return device is located at one end of the exhaust shaft.

In an embodiment, multiple transmission slip ring vent holes are arranged in a side wall of the transmission slip ring, and the transmission slip ring vent holes are configured to communicate the compressor cavity with the exhaust shaft.

In an embodiment, a backplate clearance is arranged between a back of the driven scroll and the compressor housing.

In an embodiment, self-lubricating coatings are arranged on a surface of the driving scroll, a surface of the driven scroll, and a surface of the transmission slip ring.

Compared with the prior art, the present disclosure has the following technical effects.

The driving shaft of the present disclosure drives the driving scroll to rotate, the driving scroll drives the transmission slip ring to rotate, and the transmission slip ring drives the driven scroll to rotate. The transmission slip ring restricts a relative rotation speed of the driving scroll and the driven scroll to zero under various conditions, so that a relative phase difference between the driving scroll and the driven scroll is constant. Both the driving scroll and the driven scroll of the present disclosure are self-rotating scroll, which reduces amount of unbalance generated when the scroll works, and reduces vibration and noise generated when the compressor works. Meanwhile, rotation components of the entire shaft system generate a small amount of unbalance, so that the scroll compressor can operate at a high working rotation speed.

BRIEF DESCRIPTION OF THE DRAWINGS

To more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings as required and used in the embodiments. Apparently, the drawings in the following description show merely some embodiments of the present disclosure, and those skilled in the art can still derive other drawings from these drawings without creative efforts.

FIG. 1 is a sectional view of a self-rotating scroll compressor according to an embodiment of the present disclosure;

FIG. 2 is an external schematic diagram of a self-rotating scroll compressor according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a driving scroll according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a driven scroll according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a transmission slip ring according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a side end cover according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a backplate clearance according to an embodiment of the present disclosure;

FIG. 8 is a front view of a non-return device according to an embodiment of the present disclosure;

FIG. 9 is a side view of a non-return device according to an embodiment of the present disclosure.

Reference numerals in the drawings: 101: controller housing; 102: controller cover; 2: motor end cover; 3: motor housing; 4: side end cover; 401: bearing seat; 402: vent hole; 403: side end cover seal groove; 5; compressor housing; 501; non-return device; 61: stator; 62: rotor; 63: driving shaft; 631: transmission key; 632: second bearing; 633: third bearing; 634: locking nut; 635: second skeleton seal ring; 7: driving scroll; 701: first driving part; 702: first driving friction surface; 703: second driving part; 704: second driving friction surface; 705: driving scroll seal groove; 8: transmission slip ring; 801: first fitting part; 802: second fitting part; 803: first friction surface; 804: second friction surface; 805: third friction surface; 806: fourth friction surface; 807: transmission slip ring vent hole; 9: driven scroll; 901: first driven part; 902: first driven friction surface; 903: second driven part; 904: second driven friction surface; 905: driven scroll seal groove; 10: exhaust shaft; 1001: first bearing; 1002: first skeleton seal ring; 11: compressor outlet end cover; a: low-pressure cavity; b: backplate clearance; and c: high-pressure cavity.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The following clearly and completely describes the technical solutions in embodiments of the present disclosure with reference to the embodiments of the present disclosure. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art under the premise of without contributing creative labor fall within the scope protected by the present disclosure.

The objective of the present disclosure is to provide a self-rotating scroll compressor, so as to solve the problems in the above-mentioned prior art, thereby increasing the working rotation speed of the compressor, reducing the volume of the compressor, and improving the working efficiency of the compressor.

To make the foregoing objective, features and advantages of the present disclosure clearer and more comprehensible, the present disclosure is further described in detail below with reference to the drawings and the detailed description.

As shown in FIG. 1 to FIG. 9, the embodiment of the present disclosure provides a self-rotating scroll compressor, and the self-rotating scroll compressor includes a scroll compressor structure and a driving motor. The scroll compressor structure includes a compressor housing 5, and a driving scroll 7, a driven scroll 9, a transmission slip ring 8, and an exhaust shaft 10 that are 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 that are arranged in the motor housing 3. The compressor housing 5 is connected with the motor housing 3 by means of a side end cover 4. A compression cavity is arranged between the driving scroll 7 and the driven scroll 9. The driving scroll 7 and the driven scroll 9 respectively rotate around respective central rotating shafts. There is a constant eccentric distance between the central rotating shaft of the driving scroll 7 and the central rotating shaft of the driven scroll 9, and the eccentric distance is a design radius of gyration of the driving scroll 7 and the driven scroll 9. The driving scroll 7 drives the driven scroll 9 to rotate at the same rotation speed by means of the transmission slip ring 8. A phase difference between the driving scroll 7 and the driven scroll 9 is always kept to 180°. The rotor 62 and the driving scroll 7 are respectively connected to the driving shaft 63. The rotor 62 and the driving scroll 7 are coaxially arranged with the driving shaft 63. The driving scroll 7 is connected with the driving shaft 63 by means of 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 driving scroll 7 and the driven scroll 9. The driven scroll 9 is connected with the exhaust shaft 10 by means of a fastener. The exhaust shaft 10 is rotatably connected with the compressor housing 5 by means of a first bearing 1001. The first bearing 1001 is a deep groove ball bearing. A first skeleton seal ring 1002 is arranged between an end surface of the first bearing 1001 and the compressor 5.

Specifically, in this embodiment, the driving scroll 7 includes a first plate bottom, a first scroll tooth, a first driving friction part, a second driving friction part, a first driving part 701 and a second driving part 703. The first scroll tooth, the first driving friction part and the second driving friction part are all arranged on the first plate bottom. A tooth top of the first scroll tooth is provided with a driving scroll seal groove 705 extending along a mold line thereof. A sealing strip is accommodated in the driving scroll seal groove 705. The sealing strip is in contact with a second plate bottom of the driven scroll 9. The first driving friction part and the second driving friction part are both located on an outer side of the first scroll tooth. The first driving friction part and the second driving friction part are arranged oppositely. The first driving part 701 is arranged on the first driving friction part. The second driving part 703 is arranged on the second driving friction part. The first driving part 701 and the second driving part 703 are arranged oppositely.

In this embodiment, the driven scroll 9 includes a second plate bottom, a second scroll tooth, a first driven friction part, a second driven friction part, a first driven part 901 and a second driven part 903. The second scroll tooth, the first driven friction part and the second driven friction part are all arranged on the second plate bottom. An exhaust hole is formed in the second plate bottom. The exhaust hole is in communication with the exhaust shaft 10. Compressed gas in the scroll compressor structure enters into the exhaust shaft 10 from the vent hole to be discharged. A tooth top of the second scroll tooth is provided with a driven scroll seal groove 905 extending along a mold line thereof. A sealing strip is accommodated in the driven scroll seal groove 905. The sealing strip is in contact with the first plate bottom of the driving scroll 7. The first driven friction part and the second driven friction part are both located on an outer side of the second scroll tooth. The first driven friction part and the second driven friction part are arranged oppositely. The first driven part 901 is arranged on the first driven friction part. The second driven part 903 is arranged on the second driven friction part. The first driven part 901 and the second driven part 903 are arranged oppositely.

In this embodiment, both the first scroll tooth of the driving scroll 7 and the second scroll tooth of the driven scroll 9 are of multi-dimensional conjugate surface scroll tooth structures.

In this embodiment, two first fitting parts 801 are arranged at one end of the transmission slip ring 8. The two first fitting parts 801 are arranged oppositely. The two first fitting parts 801 are matched with the first driving part 701 and the second driving part 703 and fitted in a transmission manner with the first driving part 701 and the second driving part 703, respectively. The two first fitting parts 801 divide an 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 is in contact with a first driving friction surface 702 of the first driving friction part. The second friction surface 804 is in contact with a second driving friction surface 704 of the second driving friction part. Two second fitting parts 802 are arranged at the other end of the transmission slip ring 8. The two second fitting parts 802 are arranged oppositely. The two second fitting parts 802 are matched with the first driven part 901 and the second driven part 903 and fitted in a transmission manner with the first driven part 901 and the second driven part 903, respectively. The two second fitting parts 802 divide an 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 is in contact with a first driven friction surface 902 of the first driven friction part. The fourth friction surface 806 is in contact with a second driven friction surface 904 of the second driven friction part. A plurality of transmission slip ring vent holes 807 are formed in a side wall of the transmission slip ring 8, and the transmission slip ring vent holes 807 are configured to communicate the compressor cavity with the exhaust shaft 10.

In this embodiment, the first driving part 701 and the second driving part 703 are bosses. The first fitting part 801 is a sliding slot. The first driving part 701 and the second driving part 703 slide in the corresponding first fitting part 801, respectively. The first driving part 701 and the second driving part 703 are respectively in correspondingly cooperative transmission with the corresponding first fitting part 801, so that the transmission slip ring 8 translates in a direction of the first driving part 701 or the second driving part 703 to the first fitting part 801 and simultaneously rotates. The first driven part 901 and the second driven part 903 are bosses. The second fitting part 802 is a sliding slot. The first driven part 901 and the second driven part 903 slide in the corresponding second fitting part 802, respectively. The first driven part 901 and the second driven part 903 are respectively in correspondingly cooperative transmission with the corresponding second fitting part 802, so that the transmission slip ring 8 translates in a direction of the first driven part 901 or the second driven part 903 to the second fitting part 802 and simultaneously rotates, so as to drive the transmission slip ring 8 to rotate around a rotating shaft at an eccentric distance from the driving scroll 7. The transmission slip ring 8 restricts a relative rotation speed of the driving scroll 7 and the driven scroll 9 to zero under various conditions, so that a relative phase difference between the driving scroll 7 and the driven scroll 9 is constant.

In this embodiment, self-lubricating coatings are arranged on a surface of the driving scroll 7, a surface of the driven scroll 9, and a surface of the transmission slip ring 8, so as to implement oil-free self-lubrication of a whole machine and solve the problem that a lubricating agent and a working medium are mutually soluble.

In this embodiment, a motor end cover 2 is further arranged in a lower part of the motor housing 3. A compressor cavity is arranged between the compressor housing 5 and the side end cover 4. A motor cavity is arranged among the side end cover 4, the motor housing 3, and the motor end cover 2. The motor cavity is simultaneously used as an intake cavity. An inlet hole is formed in a lower position of the motor housing 3. A plurality of vent holes 402 are formed in the side end cover 4, and the vent holes 402 are configured to communicate the motor cavity with the compressor cavity. A bearing seat 401 matched with a second bearing 632 is arranged at the center of the side end cover 4. One end of the driving shaft 63 is rotatably connected with the side end cap 4 by means of the second bearing 632, and the other end of the driving shaft 63 is rotatably connected with the motor end cover 2 by means of a third bearing 633. Both the second bearing 632 and the third bearing 633 are deep groove ball bearings. The other end of the driving shaft 63 is in threaded connection with locking nuts 634. A second skeleton seal ring 635 is arranged between the locking nut 634 and the third bearing 633.

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 driving shaft 63 and the locking nut 634 are located between the motor end cover 2 and the controller housing 101. A motor controller is placed between the controller housing 101 and the controller cover 102.

In this embodiment, the scroll compressor structure further includes a compressor outlet end cover 11. An exhaust port is formed in the compressor outlet end cover 11. The compressor outlet end cover 11 is connected to the compressor housing 5. An exhaust cavity is formed between the compressor outlet end cover 11 and the compressor housing 5. An interior of the exhaust shaft 10 is arranged hollowly. One end of the exhaust shaft 10 is capable of being in communication with the exhaust cavity, and the other end of the exhaust shaft 10 is capable of being in communication with the compressor cavity. A non-retum device 501 is arranged in the exhaust cavity. The non-return device 501 is located at one end of the exhaust shaft 10. The non-return device 501 is the prior art.

In this embodiment, the intake cavity, the compression cavity, and the exhaust cavity form a working cavity.

In this embodiment, a low-pressure cavity a is formed between the transmission slip ring 8 and the driven scroll 9, and a high-pressure cavity c is formed in the interior of the exhaust shaft 10. Based on operating conditions of different systems, there are certain differences in the actual operating pressures of the compressor. For example, when a cooling medium is R134a, the low-pressure cavity a has a pressure of 0.2 MPa, and the high-pressure cavity c has a pressure of 1.5 MPa. In order to prevent the driven scroll 9 from being subjected to an excessive axial load, and to avoid causing a large decrease of the life of the first bearing 1001 and even destroying the first bearing 1001, the back of the driven scroll 9 uses a micro-distance backplate clearance technology, that is, there is a backplate clearance b between the back of the driven scroll 9 and the compressor housing 5. Based on operating conditions of different systems, there are certain differences in actual operating pressures of the compressor. A size of the backplate clearance b needs to be adjusted based on the pressures of the high-pressure cavity c and the low-pressure cavity a. For example, when the cooling medium is R134a, the backplate clearance b has a size of 0.5 mm, and an average pressure in the backplate clearance b is 0.8 MPa. In this embodiment, while leakage amount is controlled, the backplate clearance b is formed between the back of the driven scroll 9 and the compressor housing 5, so that axial force control is performed on the driven scroll 9 to avoid decreasing the life of the first bearing 1001 and destroying the first bearing 1001.

In this embodiment, the driving scroll 7 is connected in a transmission manner with the driven scroll 9 by means of the transmission slip ring 8. The driving scroll 7 and the driven scroll 9 rotate at the same rotation speed around respective rotation axes thereof, respectively, and a distance between the two rotation axes of the driving scroll 7 and the driven scroll 9 is an eccentric distance designed for the compressor. The driving shaft 63 drives the driving scroll 7 to rotate, the driving scroll 7 drives the transmission slip ring 8 to rotate, and the transmission slip ring 8 drives the driven scroll 9 to rotate.

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 means of bolts, and the motor housing 3, the motor end cover 2, the controller housing 101, and the controller cover 102 are detachably connected by means of bolts.

In this embodiment, the pressure intensity of the cooling medium in a vehicle air conditioner system is relatively high. Therefore, the 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 seal groove 403 is formed in the side end cover 4, and a motor end cover seal groove is formed in the motor end cover 2. The sealing strips are placed in the side end cover seal groove 403 and the motor end cover seal groove. The problem that the working medium leaks during compressor operation can be effectively solved by disposing the sealing strips.

When the self-rotating scroll compressor in this embodiment operates, the driving scroll 7 and the driven scroll 9 rotate at the same rotation speed around respective central rotation axes thereof, respectively. There is a constant eccentric distance between the central rotation axis of the driving scroll 7 and the central rotation axis of the driven scroll 9. Relative motion between the transmission slip ring 8 and the driving scroll 7, the driven scroll 9 is linear translation in the direction of the first driving part 701 or the second driving part 703 to the first fitting part 801. Traction motion of the transmission slip ring 8 is constant rotation of the driving scroll 7. Therefore, absolute motion of the transmission slip ring 8 is resultant motion of the relative motion and the traction motion. When the driving scroll 7 and the driven scroll 9 rotate at the same rotation speed and at the constant eccentric distance, one scroll (the driving scroll 7) is used as a reference scroll, and a relative angular velocity of the other scroll (the driven scroll 9) is always zero, and a direction of the eccentric distance is constantly changed, that is, the reference scroll (the driving scroll 7) is constant while the other scroll (the driven scroll 9) translates around the constant eccentric distance, which is the same as a motion manner of the revolving scroll compressor.

According to the self-rotating scroll compressor in this embodiment, the driving motor is cooled by using the working medium. The working medium is introduced from the inlet hole formed in the motor housing 3 to enter into the motor cavity to absorb heat, and then enters into the compressor cavity through the vent hole 402 formed in the side end cover 4, and then enters into the working cavity of the scroll compressor through the transmission slip ring vent hole 807 formed in the transmission slip ring 8. After compression is performed on the scroll compressor structure, the working medium is exhausted from the exhaust shaft 10. By means of a non-return device 501 disposed on the compressor housing 5, backflow of the working medium caused by pressure fluctuation during compression is prevented.

The self-rotating scroll compressor in this embodiment does not require a dynamic balance weight, which breaks through a rotation speed restriction. Under a certain mass flow, a displacement of the compressor is reduced, and a volume of the whole machine is reduced. Compared with a conventional revolving scroll compressor, an internal pneumatic loss of the working cavity is lower, and in particular, a compression cavity is a low-momentum compression process, and the exhaust cavity has a certain clearance volume, so that an exhaust throttle loss is smaller, equal-entropy compression efficiency and volume efficiency are higher, the working rotation speed of the compressor is increased, and the working efficiency of the compressor is improved.

Both the driving scroll 7 and the driven scroll 9 in the present disclosure are self-rotating scrolls, which reduces the amount of unbalance generated when the scroll works, and reduces vibration and noise generated when the compressor works. In addition, a rotation component of the entire shaft system generates a small amount of unbalance, so that the scroll compressor can operate at a high working rotation speed. Under a certain mass flow rate, the design scroll line on the scroll can be shortened by increasing a design rotation speed of the scroll compressor, thereby reducing the radius of the scroll (the driving scroll 7 and the driving scroll 9), and reducing the overall volume of the scroll compressor.

In the self-rotating scroll compressor of the present disclosure, compared with a revolving scroll compressor, when the self-rotating scroll compressor of the present disclosure works, both side scroll tooth wall surfaces of a compressor cavity are moving, so that friction loss between the working medium and the compressor cavity can be reduced, and the working efficiency of the scroll compressor can be improved.

In the present disclosure, a central transmission slip ring 8 is used, that is, the transmission slip ring 8 is located between the driving scroll 7 and the driven scroll 9, thereby effectively improving stability of the transmission slip ring 8 when operating at a high speed, and also improving structural durability of the transmission slip ring 8. In addition, the transmission slip ring 8 also keeps a reasonable axial clearance between the driving scroll 7 and the driven scroll 9, so as to prevent deformation of the scroll tooth due to mutual collision between the tooth tops and the plate bottoms of the driving scroll 7 and the driven scroll 9 during operation.

In the present disclosure, the intake hole is formed in the lower position of the motor housing 3, so that the motor can be effectively cooled without using another cooling device, motor volume and system complexity are significantly reduced, and working reliability of the motor is improved.

The self-lubricating coating is used in the present disclosure, and the self-lubricating coating can effectively lubricate the driving scroll 7, the driven scroll 9, and the transmission slip ring 8. In addition, a meshing clearance between the driving scroll 7 and the driven scroll 9 is reduced, leakage amount is reduced, and compression efficiency is improved.

Specific examples are used for illustration of the principles and implementations of the present disclosure. The description of the above-mentioned embodiments is used to help understand the method and the core ideas of the present disclosure; and meanwhile, those skilled in the art can make various modifications in terms of specific implementations and scope of application in accordance with the ideas of the present disclosure. In summary, the contents of this specification should not be understood as a limitation to the present disclosure.

Claims

1. A self-rotating scroll compressor, comprising a scroll compressor structure and a driving motor, wherein the scroll compressor structure comprises a compressor housing, and a driving scroll, a driven scroll, a transmission slip ring, and an exhaust shaft that are arranged in the compressor housing; the driving motor comprises a motor housing, and a driving shaft, a rotor, and a stator that are arranged in the motor housing; the compressor housing is connected with the motor housing by means of a side end cover; a phase difference between the driving scroll and the driven scroll is 180°; the rotor and the driving scroll are connected with the driving shaft, respectively; the rotor and the stator rotate relative to each other; the transmission slip ring is located between the driving scroll and the driven scroll; the driven scroll is connected to the exhaust shaft; and the exhaust shaft is rotatably connected to the compressor housing.

2. The self-rotating scroll compressor according to claim 1, wherein the driving scroll comprises a first plate bottom, a first scroll tooth, a first driving friction part, a second driving friction part, a first driving part and a second driving part; the first scroll tooth, the first driving friction part and the second driving friction part are all arranged on the first plate bottom; the first driving friction part and the second driving friction part are both located on an outer side of the first scroll tooth; the first driving friction part and the second driving friction part are arranged oppositely; the first driving part is arranged on the first driving friction part, the second driving part is arranged on the second driving friction part; and the first driving friction part and the second driving friction part are arranged oppositely; and

the driven scroll comprises a second plate bottom, a second scroll tooth, a first driven friction part, a second driven friction part, a first driven part and a second driven part; the second scroll tooth, the first driven friction part and the second driven friction part are all arranged on the second plate bottom; an exhaust hole is formed in the second scroll bottom; the exhaust hole is in communication with the exhaust shaft; the first driven friction part and the second driven friction part are both located on an outer side of the second scroll tooth; the first driven friction part and the second driven friction part are arranged oppositely, the first driven part is arranged on the first driven friction part, the second driven part is arranged on the second driven friction part; and the first driven part and the second driven part are arranged oppositely.

3. The self-rotating scroll compressor according to claim 2, wherein two first fitting parts are arranged at one end of the transmission slip ring, the two first fitting parts are arranged oppositely; the two first fitting parts are in fit with the first driving part and the second driving part, respectively; an end surface of one end of the transmission slip ring is divided by means of the two first fitting parts into a first friction surface and a second friction surface, the first friction surface is in contact with a first driving friction surface of the first driving friction part, and the second friction surface is in contact with a second driving friction surface of the second driving friction part; and two second fitting parts are arranged at an other end of the transmission slip ring, the two second fitting parts are arranged oppositely; the two second fitting parts are in fit with the first driven part and the second driven part, respectively; an end surface of the other end of the transmission slip ring is divided by means of the two second fitting parts into a third friction surface and a fourth friction surface; the third friction surface is in contact with a first driven friction surface of the first driven friction part, and the fourth friction surface is in contact with a second driven friction surface of the second driven friction part.

4. The self-rotating scroll compressor according to claim 3, wherein the first driving part and the second driving part are bosses, and the first fitting part is a sliding slot; alternatively, the first driving part and the second driving part are sliding slots, and the first fitting part is a boss.

5. The self-rotating scroll compressor according to claim 3, wherein the first driven part and the second driven part are bosses, and the second fitting part is a sliding slot; alternatively, the first driven part and the second driven part are sliding slots, and the second fitting part is a boss.

6. The self-rotating scroll compressor according to claim 1, wherein a motor end cover is further arranged at a lower part of the motor housing, a compressor cavity is arranged between the compressor housing and the side end cover, a motor cavity is arranged among the side end cover, the motor housing, and the motor end cover; an inlet hole is arranged in the motor housing, a plurality of vent holes are arranged in the side end cover, and the vent hole is configured to communicate the motor cavity with the compressor cavity; and

one end of the driving shaft is rotatably connected to the side end cover, an other end of the driving shaft is rotatably connected to the motor end cover, and locking nuts are arranged at the other end of the driving shaft.

7. The self-rotating scroll compressor according to claim 6, wherein the scroll compressor structure further comprises a compressor outlet end cover, an exhaust port is arranged in the compressor outlet end cover, the compressor outlet end cover is connected to the compressor housing, an exhaust cavity is formed between the compressor outlet end cover and the compressor housing, an exterior of the exhaust shaft is arranged hollowly, one end of the exhaust shaft is capable of being in communication with the exhaust cavity, and an other end of the exhaust shaft is capable of being in communication with the compressor cavity; and a non-return device is arranged in the exhaust cavity, and the non-return device is located at one end of the exhaust shaft.

8. The self-rotating scroll compressor according to claim 6, wherein a plurality of transmission slip ring vent holes are arranged in a side wall of the transmission slip ring, and the transmission slip ring vent holes are configured to communicate the compressor cavity with the exhaust shaft.

9. The self-rotating scroll compressor according to claim 1, wherein a backplate clearance is arranged between a back of the driven scroll and the compressor housing.

10. The self-rotating scroll compressor according to claim 1, wherein self-lubricating coatings are arranged on a surface of the driving scroll, a surface of the driven scroll, and a surface of the transmission slip ring.

Patent History
Publication number: 20260226896
Type: Application
Filed: Jun 6, 2024
Publication Date: Aug 6, 2026
Inventor: Shengping FAN (Yichang)
Application Number: 19/158,373
Classifications
International Classification: F04C 18/02 (20060101);