CN114189086B

CN114189086B - Motors, compressors and refrigeration systems

Info

Publication number: CN114189086B
Application number: CN202111573955.2A
Authority: CN
Inventors: 张龙爱; 周江峰; 鲁涵锋; 范风强
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2025-03-25
Anticipated expiration: 2041-12-21
Also published as: CN114189086A

Abstract

The present disclosure provides a motor, a compressor and a refrigeration system. The motor includes: a motor housing, including a housing body and a plurality of bosses arranged on the inner surface of the housing body, the housing body and the plurality of bosses defining a motor mounting hole; a stator core, located in the motor mounting hole; and a damping sleeve, located in the motor mounting hole between the motor housing and the stator core, the inner surface of the damping sleeve abutting against the stator core, and the outer surface of the damping sleeve abutting against the plurality of bosses. The motor of the present disclosure embodiment can reduce the magneto-induced vibration of the motor.

Description

Motor, compressor and refrigerating system

Technical Field

The present disclosure relates to the field of motor technologies, and in particular, to a motor, a compressor, and a refrigeration system.

Background

In the technical field of motors, motor vibration reduction is increasingly emphasized. Taking the motor of the screw compressor of the refrigeration system as an example, the energy efficiency of the motor reaches a quite high level, but the vibration noise level of the compressor is gradually focused by a user, and the vibration noise of the compressor gradually becomes a core index for influencing the user experience.

The motor and the compressor body of the screw compressor of the refrigerating system are generally integrally designed, a motor stator and a boss on the inner surface of a shell are arranged in the shell of the air suction end of the compressor through interference fit, and the space between a stator core and the boss of the shell is a refrigerant air flow channel. In the related art, the circumferential direction of the stator core is limited by only the spaced bosses, the circumferential direction of the stator core is not continuous, the constraint rigidity is limited, electromagnetic waves are easy to coincide with the inherent vibration characteristics of the stator to generate resonance, or the vibration response caused by the electromagnetic waves is larger because of insufficient constraint rigidity.

Disclosure of Invention

The invention aims to provide a motor, a compressor and a refrigerating system, and aims to solve the problem that the motor is large in magnetic vibration.

A first aspect of the present disclosure provides an electric machine comprising:

A motor housing including a housing body and a plurality of bosses provided to an inner surface of the housing body, the housing body and the plurality of bosses defining a motor mounting hole;

A stator core located in the motor mounting hole, and

The damping sleeve is positioned in the motor mounting hole between the motor shell and the stator core, the inner surface of the damping sleeve is abutted to the stator core, and the outer surface of the damping sleeve is abutted to the bosses.

In some embodiments, the damping sleeve is made of a damping alloy.

In some embodiments, the damping alloy is a manganese copper alloy.

In some embodiments, the damping sleeve has a thickness of 16mm-30mm.

In the electric machine of some embodiments,

The outer surface of the damping sleeve is provided with a mounting groove extending along the circumferential direction;

The motor further comprises a damping ring, and the damping ring is installed in the installation groove and matched with the installation groove.

In some embodiments, the surface of the mounting groove that mates with the damping ring and/or the surface of the damping ring that mates with the mounting groove has microstructures for increasing surface roughness.

In some embodiments, the mounting groove has a depth of 3 mm-6 mm and a width of 2 mm-5 mm.

In some embodiments, the motor has a preload force between the damping ring and the mounting groove.

In some embodiments, the mounting groove is an open groove and the damping ring is an open ring.

In some embodiments, the plurality of mounting grooves are arranged along the axial direction of the damping sleeve, and the plurality of damping rings are arranged in the plurality of mounting grooves in a one-to-one correspondence.

In some embodiments, the mounting groove is an open groove, the damping ring is an open ring, and the openings of the open grooves and the openings of the open rings are aligned in a straight line along the axial direction of the damping sleeve.

In some embodiments, the outer surface of the damping sleeve is a cylindrical surface, the plurality of bosses extend along the axial direction of the motor housing and are uniformly distributed along the circumferential direction of the motor housing, and the surface of each boss, which is abutted against the damping sleeve, is a cylindrical surface with a circular arc-shaped cross section matched with the outer surface of the damping sleeve 2.

In the electric machine of some embodiments,

The damping sleeve is in interference fit with the bosses and/or

The damping sleeve is in interference fit with the stator core.

In the electric machine of some embodiments,

The damping sleeve is connected with the motor shell through a first connecting key, and/or

The damping sleeve is connected with the stator core through a second connecting key.

In some embodiments of the motor, the first connecting key is located in a sleeve outer keyway on an outer surface of the damping sleeve and in a housing inner keyway on one of the bosses.

In the electric machine of some embodiments,

The outer surface of the damping sleeve is provided with a mounting groove extending along the circumferential direction, and the mounting groove is an open groove;

the motor further comprises a damping ring, wherein the damping ring is arranged in the mounting groove and matched with the mounting groove, and the damping ring is an open ring;

the sleeve outer key groove is arranged at the opening of the opening groove and the opening of the damping ring.

In some embodiments, the motor further comprises a first stop for limiting the position of the first connection key in the axial direction of the damping sleeve and a second stop for limiting the position of the second connection key in the axial direction of the damping sleeve.

A second aspect of the present disclosure provides a compressor comprising a compressor body and a motor drivingly connected to a rotor of the compressor body for driving the rotor of the compressor body to rotate, the motor being a motor according to the first aspect of the present disclosure.

A third aspect of the present disclosure provides a refrigeration system comprising a compressor according to the second aspect of the present disclosure.

Based on the motor that this disclosure provided, through increasing the damping sleeve between stator core and motor housing's boss, do benefit to the realization and retrain completely stator core's circumferencial direction, increased stator core's restraint rigidity, structurally increased the mechanical impedance on the motor electromagnetic vibration transmission route to can realize reducing motor magnetic vibration's effect.

The compressor and refrigeration system provided by the present disclosure have the same advantages as the motor provided by the present disclosure. Other features of the present disclosure and its advantages will become apparent from the following detailed description of exemplary embodiments of the disclosure, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate and explain the present disclosure, and together with the description serve to explain the present disclosure. In the drawings:

fig. 1 is an assembled structural schematic diagram of a part of the structure of a motor according to an embodiment of the present disclosure.

Fig. 2 is an exploded structural schematic view of a part of the structure of a motor according to an embodiment of the present disclosure.

FIG. 3 is a schematic structural view of a damping ring according to an embodiment of the present disclosure.

In fig. 1 to 3, each reference numeral represents:

1. The motor comprises a motor shell, 11, a motor mounting hole, 12, a shell body, 13 and a boss;

2. Damping sleeve, 21, mounting groove, 22, sleeve outer key groove, 23, sleeve inner key groove;

3. Stator core, 31, core outer keyway;

4.a damping ring;

5. the first limiting part 51, the first baffle plate 52 and the first screw;

6. The second limiting part 61, the second baffle plate 62 and the second screw;

7. A first connection key;

8. And a second connection key.

Detailed Description

The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present disclosure, it should be understood that the use of terms such as "first," "second," etc. for defining components is merely for convenience in distinguishing corresponding components, and the terms are not meant to be construed as limiting the scope of the present disclosure unless otherwise indicated.

In the description of the present disclosure, it should be understood that the azimuth or positional relationship indicated by the azimuth word is generally based on the azimuth or positional relationship shown in the drawings, and is merely for convenience of describing the present disclosure and simplifying the description, and the azimuth words do not indicate or imply that the device or element to be referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present disclosure, and the azimuth words "inside and outside" refer to inside and outside with respect to the outline of each component itself.

In the process of realizing the technical scheme of the present disclosure, the inventors found that the related art has the following disadvantages after studying the related art:

The motor stator iron core of the screw compressor in the related art is mounted in a boss on the inner surface of a motor shell of the compressor through a press mounting process, the boss can cause deformation of a silicon steel sheet of the stator iron core, roundness is poor, an air gap between a stator and a rotor is uneven, and then electromagnetic vibration is poor.

The stator core and motor housing of the related art screw compressor have a small damping effect and a limited vibration damping effect provided only by the motor housing (generally, cast iron).

The motor stator core of the screw compressor in the related art is discontinuously restrained in the circumferential direction and discontinuously restrained in the circumferential direction, and the restraint rigidity on the stator core is small and uneven.

To solve the foregoing technical problems, as shown in fig. 1 to 3, an embodiment of the present disclosure provides a motor. The motor mainly comprises a motor shell 1, a stator core 3 and a damping sleeve 2. The motor also includes a motor rotor, not shown. The motor rotor is rotatably disposed in the center hole of the stator core 3.

As shown in fig. 1 and 2, the motor housing 1 includes a housing main body 12 and a plurality of bosses 13 provided to an inner surface of the housing main body 12, the housing main body 12 and the plurality of bosses 13 defining a motor mounting hole 11. The stator core 3 is located in the motor mounting hole 11. The damping sleeve 2 is located in the motor mounting hole 11 between the motor housing 1 and the stator core 3. The inner surface of the damper sleeve 2 abuts against the stator core 3, and the outer surface of the damper sleeve 2 abuts against the plurality of bosses 13.

According to the motor disclosed by the embodiment of the disclosure, the damping sleeve 2 is added between the stator core 3 and the boss 13 of the motor shell 1, so that complete restraint on the circumferential direction of the stator core 3 is facilitated, the restraint rigidity of the stator core 3 is increased, and the mechanical impedance on the electromagnetic vibration transmission path of the motor is structurally increased, so that the effect of reducing the electromagnetic vibration of the motor can be realized.

Through increasing damping sleeve 2 between stator core 3 and boss 13 of motor housing 1, do benefit to the cylindricity of guaranteeing stator core 3 and the circularity of stator silicon steel sheet, make the air gap between stator core 3 and the motor rotor even, do benefit to the deformation problem that produces when stator core 3 direct pressure equipment time boss 13 of motor housing 1 acts on stator core 3.

In some embodiments, the damping sleeve 2 is made of damping alloy.

The damping sleeve 2 manufactured by adopting the damping alloy (damping alloy) has stable dynamic characteristics and high reliability, is not easy to weaken or lose efficacy along with the ambient temperature and the service time, and can achieve the purposes of improving the working accuracy of the motor, prolonging the service life and reducing the noise.

In some embodiments, the motor is a manganese-copper alloy. The strength of the manganese-copper alloy is 540-700 megapascals, the elongation is 20% -40%, the damping index is 20% -40%, and a good vibration reduction effect can be achieved.

In some embodiments, the thickness of the damping sleeve 2 is 16mm-30mm. The damping sleeve 2 is provided with a proper thickness, so that a good damping effect can be realized on the premise of saving materials and cost as much as possible and reducing the weight of the motor.

As shown in fig. 1 and 2, in some embodiments of the motor, a circumferentially extending mounting groove 21 is provided on the outer surface of the damping sleeve 2. The motor further comprises a damping ring 4, and the damping ring 4 is arranged in the mounting groove 21 and matched with the mounting groove 21. Vibration energy can be dissipated through friction between the damping sleeve and the damping ring, and motor vibration is further reduced. The damping ring 4 may be made of the same or different damping material as the damping sleeve 2.

In some embodiments of the motor, the surface of the mounting groove 21 that mates with the damping ring 4 and/or the surface of the damping ring 4 that mates with the mounting groove 21 has microstructures for increasing surface roughness. The microstructure includes, for example, a plurality of micropores, minute protrusions, minute lines, and the like. The microstructure is provided to facilitate dissipation of vibrational energy.

In some embodiments, the mounting slot 21 has a depth of 3 mm-6 mm and a width of 2 mm-5 mm. The proper size of the mounting groove 21 is set, so that the damping ring 4 with proper size is mounted on the basis of ensuring the strength of the damping sleeve 2, and the damping ring 4 and the damping sleeve 2 keep a good matching state so as to achieve the purpose of stably dissipating vibration energy.

In some embodiments, the motor has a preload between the damping ring 4 and the mounting groove 21. This arrangement facilitates the damping ring 4 to maintain a good fit with the mounting groove 21 for the purpose of stable dissipation of vibrational energy.

In some embodiments of the motor, the mounting groove 21 is an open groove and the damping ring 4 is an open ring. This arrangement facilitates assembly of the damping ring 4, sleeving of the damping ring 4 on the damping sleeve 2, and installation with pre-tightening force between the damping ring 4 and the mounting groove 21.

In the motor of some embodiments, a plurality of mounting grooves 21 are arranged in the axial direction of the damping sleeve 2, and a plurality of damping rings 4 are provided in the plurality of mounting grooves 21 in one-to-one correspondence. This arrangement facilitates the use of the damping ring 4 and the mounting groove 21 to dissipate vibrational energy.

In some embodiments of the motor, the mounting groove 21 is an open groove, the damping ring 4 is an open ring, and the openings of the plurality of open grooves and the openings of the plurality of open rings are aligned in the axial direction of the damping sleeve 2. This arrangement facilitates the unified machining and assembly of the damping sleeve 2 and the damping ring 4.

In the motor of some embodiments, the outer surface of the damping sleeve 2 is a cylindrical surface, the plurality of bosses 13 extend along the axial direction of the motor housing 1 and are uniformly distributed along the circumferential direction of the motor housing 1, and the surface of each boss 13 abutting against the damping sleeve 2 is a cylindrical surface with a circular arc-shaped cross section matched with the outer surface of the damping sleeve 2. The damping sleeve 2 is favorable for stably installing and supporting the stator core 3 in the motor shell 1, reducing the installation error and improving the assembly precision.

In some embodiments, the damping sleeve 2 is an interference fit with the plurality of bosses 13 and/or the damping sleeve 2 is an interference fit with the stator core 3. The arrangement is beneficial to ensuring the cylindricity of the stator core 3 and the roundness of the stator silicon steel sheet and is beneficial to the uniformity of the air gap between the stator core 3 and the motor rotor.

In some embodiments, the damping sleeve 2 is keyed to the motor housing 1 by a first connection key 7 and/or the damping sleeve 2 is keyed to the stator core 3 by a second connection key 8. The circumferential fixation of the damping sleeve 2 and the motor shell 1 and/or the damping sleeve 2 and the stator core 3 can be realized through a key connection mode, and the assembly and the disassembly of the damping sleeve 2 and the motor shell 1 and/or the damping sleeve 2 and the stator core 3 are facilitated.

In some embodiments of the motor, the first connecting key 7 is located in the sleeve outer keyway 22 on the outer surface of the damping sleeve 2 and in the housing inner keyway 131 on one of the bosses 13. This arrangement facilitates quick assembly of the damping sleeve 2 with the motor housing 1.

In the motor of some embodiments, a mounting groove 21 extending along the circumferential direction is arranged on the outer surface of the damping sleeve 2, the mounting groove 21 is an open groove, the motor further comprises a damping ring 4, the damping ring 4 is arranged in the mounting groove 21 and matched with the mounting groove 21, the damping ring 4 is an open ring, and sleeve outer key grooves 22 are arranged at the open grooves and the openings of the damping ring 4. The relative positions of the damping ring 4, the mounting groove 21 and the sleeve outer key groove 22 are reasonably arranged, so that the relative structures can realize functions of the relative structures and do not interfere with each other when the relative structures are arranged.

In the motor of some embodiments, the motor further includes a first limiting portion 5 for limiting the position of the first connection key 7 in the axial direction of the damping sleeve 2 and a second limiting portion 6 for limiting the position of the second connection key 8 in the axial direction of the damping sleeve 2. The first limiting portion and the second limiting portion facilitate improving connection stability between components connected through keys.

The embodiment of the disclosure also provides a compressor, which comprises a compressor body and a motor in driving connection with the rotor of the compressor body to drive the rotor of the compressor body to rotate, and is characterized in that the motor is the motor of the embodiment of the disclosure. The compressor is, for example, a screw compressor. The compressor of the embodiments of the present disclosure has the same advantages as the motor of the embodiments of the present disclosure.

The disclosed embodiments also provide a refrigeration system including a compressor of the disclosed embodiments. The refrigeration system of the embodiments of the present disclosure has the same advantages as the compressor of the embodiments of the present disclosure and the motor of the embodiments of the present disclosure.

The motor of the embodiments of the present disclosure is described in more detail below with reference to fig. 1 to 3.

As shown in fig. 1 to 3, the inner surface of the case body 12 of the motor case 1 is provided with a plurality of bosses 13, and the inner surface of the case body 12 and the plurality of bosses 13 define the motor mounting hole 11. For realizing the installation of the motor and the foundation, the lower part of the shell body 12 is also provided with an integrated machine leg.

The plurality of bosses 13 extend in the axial direction of the motor housing 1 and are uniformly distributed in the circumferential direction of the motor housing 1. The number of bosses 13 is, for example, 4 to 8. The surface of the boss 13 on the side facing the damping sleeve 2 is a cylindrical surface with a circular arc-shaped cross section, and the cylindrical surface is finished to be well matched with the damping sleeve 2.

An in-housing key groove 131 for mounting the first connecting key 7 is formed on the boss 13 located at the top of the motor housing 1 in fig. 1 and 2.

A damper sleeve 2 is installed between the boss 13 on the inner surface of the case body 12 and the stator core 13, and the outer surface of the damper sleeve 2 is finished to be well fitted with the aforementioned cylindrical surface of the boss 13. The damping sleeve thickness is 16 mm-30 mm.

In fig. 1 and 2, the top outer surface of the damping sleeve 2 is axially provided with a sleeve outer key groove 22 opposite to the housing inner key groove 131, and the sleeve outer key groove 22 is used for mounting the first connecting key 9, and the first connecting key 9 can restrict the rotational freedom of the damping sleeve 2 around the axis of the motor housing 1 after being mounted in the housing inner key groove 131 and the sleeve outer key groove 22.

In fig. 1 and 2, a sleeve inner key groove 23 is axially formed in the bottom of the inner surface of the damping sleeve 2 and is used for mounting the second connecting key 10, an iron core outer key groove 31 is axially formed in the outer surface of the stator core 3 along the axial direction of the stator core 3 and is used for mounting the second connecting key 8, and after the second connecting key 8 is mounted in the sleeve inner key groove 23 and the iron core outer key groove 31, the rotational freedom degree of the stator core 3 around the axis of the motor housing 1 can be restrained.

The stator core 3 is installed through interference fit's mode after the internal surface of damping sleeve 2 is finished to do benefit to the circularity of the silicon steel sheet of guaranteeing stator core 3, do benefit to simultaneously and guarantee that the air gap is even between stator core 3 and the motor rotor of installing in stator core 3's centre bore.

As shown in fig. 2, the damping sleeve 2 is provided with a mounting groove 21 in the circumferential direction. The depth of the mounting groove 21 is 3mm-6mm and the width is 2mm-5mm. The plurality of mounting grooves 21 are arranged side by side at intervals in the axial direction of the damping sleeve 2. The mounting groove 21 is not completely communicated end to end in the circumferential direction, but has an open groove which is open so that the mounting groove 21 avoids the arrangement position of the sleeve outer key groove 22 at the top of the damping sleeve 2.

As shown in fig. 2, a damping ring 4 is embedded in each mounting groove 21. As shown in fig. 2 and 3, the damping ring 4 is a split ring. The opening of the damping ring 4 corresponds to the opening of the mounting groove 21. The openings of all damping rings 4 are aligned with the openings of the mounting groove 21 in the axial direction of the damping sleeve 2. In this embodiment, the inner surface of the damping ring 4 is machined with a microstructure, which is a plurality of micro-protrusions for increasing roughness, thereby increasing friction with the surface of the mounting groove 21 of the damping sleeve 2. When the stator core 3 vibrates, the damping sleeve 2 rubs with the corresponding damping ring 4 on the inner surface of the mounting groove 21 of the damping sleeve 2, and vibration energy is consumed. The damping ring 4 has a certain pretightening force when being arranged in the mounting groove 21 so as to keep the damping ring 4 in a contact state with the mounting groove 21 when the motor vibrates, thereby realizing vibration energy consumption.

In order to prevent the axial play of the first connection key 7 along the damping sleeve 2, a first limiting portion 5 is provided to limit the movement of the first connection key 7 along the axial direction of the damping sleeve 2. As shown in fig. 1 and 2, the first stopper includes a first shutter 51 and a first screw 52. The first baffle 6 is blocked at the end of the first connecting key 7, and the first baffle 6 is fixed at the end of the boss 13 provided with the key groove 131 in the housing by the first screw 52, so that the first connecting key 7 can be limited in the axial direction of the damping sleeve 2.

Similarly, to prevent the second connection key 8 from moving axially along the damping sleeve 2, a second limiting portion 6 is designed to limit the movement of the second connection key 8 in the axial direction of the damping sleeve 2. As shown in fig. 1 and 2, the second stopper includes a second baffle 61 and a second screw 62. The second baffle 6 is covered at the end part of the second connecting key 8, and the second baffle 6 is fixed at the end part of the boss 13 below the second connecting key 8 through the second screw 62, so that the limiting of the second connecting key 8 along the axial direction of the damping sleeve 2 can be realized.

The first and second connection keys 7 and 8 are disposed 180 degrees apart in the circumferential direction.

As is apparent from the above description, in the motor of the embodiment of the present disclosure, vibration reduction is achieved by providing the damping sleeve 2 between the stator core 3 and the motor housing 1 to increase mechanical resistance and damping on the vibration transmission path between the internal vibration source to the motor housing. During operation of the motor, electromagnetic waves excite the stator core to vibrate, the vibration is transmitted to the motor housing 1 through the boss 13 on the inner surface of the housing body 12 of the motor housing 1, vibration and noise radiation of the motor housing 1 are caused, the constraint rigidity of the stator core 3 is increased by adding the damping sleeve 2 between the stator core 3 and the housing 1, and mechanical impedance on a transmission path of the vibration of the stator core 3 to the motor housing 1 is increased. Through embedding damping ring 4 in the mounting groove 21 that damping sleeve 2's surface set up, still consume vibration energy through the friction damping between damping sleeve 2 and the damping ring 4, further reduce the transmission of magneto vibration to motor housing 1 to reduce motor's vibration and noise, improve user's travelling comfort.

When the motor is used for the compressor to drive the rotor of the compressor body, vibration and noise of the compressor are reduced.

In the above embodiments, the motor of the present disclosure is described as being applied to the rotation of the rotor of the compressor body driving the screw compressor in the screw compressor of the refrigeration system, but the motor of the present disclosure is not limited thereto, but may be applied to various devices or systems employing motor driving, for example, the motor may also be applied to a rotary piston compressor.

It should be finally understood that the foregoing embodiments are merely for illustrating the technical solutions of the present disclosure and not for limiting the same, and although the present disclosure has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications may be made to the specific embodiments of the present disclosure or equivalents may be substituted for part of the technical features thereof, which are all included in the scope of the technical solutions claimed in the present disclosure.

Claims

1. A motor, comprising:

A motor housing (1) comprises a housing body (12) and a plurality of bosses (13) arranged on the inner surface of the housing body (12), wherein the housing body (12) and the plurality of bosses (13) define a motor mounting hole (11);

A stator core (3) located in the motor mounting hole (11);

A damping sleeve (2) is located in the motor mounting hole (11) between the motor housing (1) and the stator core (3), the inner surface of the damping sleeve (2) abuts against the stator core (3), the outer surface of the damping sleeve (2) abuts against the plurality of bosses (13), and the outer surface of the damping sleeve (2) is provided with a plurality of mounting grooves (21) extending in the circumferential direction, the plurality of mounting grooves (21) are arranged in the axial direction of the damping sleeve (2) and are open grooves; and

A plurality of damping rings (4) are arranged in a one-to-one correspondence in the plurality of mounting grooves (21) and cooperate with the corresponding mounting grooves (21); the damping rings (4) are open rings, and the openings of the plurality of open grooves and the openings of the plurality of open rings are arranged in a straight line along the axial direction of the damping sleeve (2);

The damping sleeve (2) is connected to the motor housing (1) via a first connecting key (7), wherein the first connecting key (7) is located in a sleeve outer keyway (22) at the opening of the damping ring (4) and the opening of the damping sleeve (2) on the outer surface of the damping sleeve (2) and in a housing inner keyway (131) located on one of the bosses (13).

2. The motor according to claim 1, characterized in that the damping sleeve (2) is made of a damping alloy.

3 . The motor according to claim 2 , wherein the damping alloy is a manganese-copper alloy.

4. The motor according to claim 2, characterized in that the thickness of the damping sleeve (2) is 16 mm-30 mm.

5. The motor according to any one of claims 1 to 4, characterized in that the surface of the mounting groove (21) that cooperates with the damping ring (4) and/or the surface of the damping ring (4) that cooperates with the mounting groove (21) has a microstructure for increasing surface roughness.

6. The motor according to any one of claims 1 to 4, characterized in that the installation groove (21) has a depth of 3 mm to 6 mm and a width of 2 mm to 5 mm.

7. The motor according to any one of claims 1 to 4, characterized in that there is a pre-tightening force between the damping ring (4) and the mounting groove (21).

8. The motor according to any one of claims 1 to 4, characterized in that the outer surface of the damping sleeve (2) is a cylindrical surface, a plurality of the bosses (13) extend along the axial direction of the motor housing (1) and are evenly distributed along the circumference of the motor housing (1), and the surface of each boss (13) abutting against the damping sleeve (2) is a cylindrical surface with a circular arc cross-section that matches the outer surface of the damping sleeve (2).

9. The electric machine according to any one of claims 1 to 4, characterized in that

The damping sleeve (2) and the plurality of bosses (13) are in interference fit; and/or

The damping sleeve (2) and the stator core (3) are in interference fit.

10. The electric machine according to any one of claims 1 to 4, characterized in that

The damping sleeve (2) and the stator core (3) are connected via a second connecting key (8).

11. The motor according to claim 10, characterized in that the motor further comprises a first limiting portion (5) for limiting the axial position of the first connecting key (7) along the damping sleeve (2) and a second limiting portion (6) for limiting the axial position of the second connecting key (8) along the damping sleeve (2).

12. A compressor, comprising a compressor body and a motor drivingly connected to a rotor of the compressor body to drive the rotor of the compressor body to rotate, wherein the motor is a motor according to any one of claims 1 to 11.

13. A refrigeration system, comprising the compressor according to claim 12.