CN113389730A

CN113389730A - Rotor subassembly, compressor and air conditioner

Info

Publication number: CN113389730A
Application number: CN202110842140.3A
Authority: CN
Inventors: 曹聪; 张治平; 龙忠铿; 武晓昆
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2021-09-14

Abstract

The embodiment of the invention provides a rotor assembly, a compressor and an air conditioner, wherein the rotor assembly comprises: a first rotor structure; a second rotor structure; a bearing seat; a first magnetic part is arranged at one end of the first rotor structure close to the bearing seat, a second magnetic part is arranged at one side of the bearing seat close to the first rotor structure, and the magnetic poles of the sides of the first magnetic part and the second magnetic part close to each other are the same; or/and one end of the second rotor structure, which is close to the bearing seat, is provided with a third magnetic part, one side of the bearing seat, which is close to the second rotor structure, is provided with a fourth magnetic part, and the magnetic poles of the sides, which are close to each other, of the third magnetic part and the fourth magnetic part are the same. According to the rotor assembly provided by the embodiment of the invention, the gap can be always kept between the first rotor structure and/or the second rotor structure and the bearing seat, so that the first rotor structure and/or the second rotor structure can be prevented from being rubbed and collided with the bearing seat, and the structural stability of the rotor assembly is improved.

Description

Rotor subassembly, compressor and air conditioner

Technical Field

The invention relates to the technical field of fluid machinery, in particular to a rotor assembly, a compressor and an air conditioner.

Background

The screw compressor has the characteristics of compactness, high efficiency, reliable performance, strong adaptability and the like, is widely applied to aerodynamic force, refrigeration air conditioners and various process flows, and has continuously expanded market share.

In practical application, during the operation of the screw compressor, the rotor is easy to rub against the bearing seat, so that the rotor is scratched, and further, the operation of the screw compressor is unstable.

Disclosure of Invention

The embodiment of the invention provides a rotor assembly, a compressor and an air conditioner, which can enable a gap to be always kept between a first rotor structure and/or a second rotor structure and a bearing seat, so that the first rotor structure and/or the second rotor structure can be prevented from being rubbed and collided with the bearing seat, and the structural stability of the rotor assembly is improved.

An embodiment of the present invention provides a rotor assembly, including:

a first rotor structure;

a second rotor structure meshed with the first rotor structure;

a bearing housing disposed on one side of the first and second rotor structures and configured to support the first and second rotor structures;

a first magnetic part is arranged at one end, close to the bearing seat, of the first rotor structure, a second magnetic part is arranged at one side, close to the first rotor structure, of the bearing seat, and the magnetic poles of the sides, close to each other, of the first magnetic part and the second magnetic part are the same; or/and

one end, close to the bearing seat, of the second rotor structure is provided with a third magnetic part, one side, close to the second rotor structure, of the bearing seat is provided with a fourth magnetic part, and magnetic poles of one side, close to each other, of the third magnetic part and the fourth magnetic part are the same.

In some embodiments, the first magnetic element is embedded in one end of the first rotor structure close to the bearing seat, and the second magnetic element is embedded in one side of the bearing seat close to the first rotor structure; or/and

the third magnetic part is embedded in one end, close to the bearing seat, of the second rotor structure, and the fourth magnetic part is embedded in one side, close to the second rotor structure, of the bearing seat.

In some embodiments, a side of the first magnetic member close to the second magnetic member protrudes from an end of the first rotor structure, and a side of the second magnetic member close to the first magnetic member protrudes from a side of the bearing seat; or/and

one side of the third magnetic part, which is close to the fourth magnetic part, protrudes out of the end part of the second rotor structure, and one side of the fourth magnetic part, which is close to the third magnetic part, protrudes out of the side of the bearing seat.

In some embodiments, the number of bearing seats is two, one on each of opposite sides of the first and second rotor structures.

In some embodiments, the first rotor structure comprises a first rotor and a second rotor coaxially arranged, the first rotor and the second rotor having opposite thread directions;

the second rotor structure comprises a third rotor and a fourth rotor which are coaxially arranged, the first rotor is meshed with the third rotor to drive the third rotor to rotate, and the second rotor is meshed with the fourth rotor to drive the fourth rotor to rotate.

In some embodiments, a fifth magnetic member is disposed at an end of the third rotor close to the fourth rotor, a sixth magnetic member is disposed at an end of the fourth rotor close to the third rotor, and the magnetic poles of the sides of the fifth magnetic member and the sixth magnetic member close to each other are the same.

In some embodiments, the fifth magnetic member is embedded in the third rotor, and the sixth magnetic member is embedded in the fourth rotor.

In some embodiments, a side of the fifth magnetic member close to the sixth magnetic member protrudes from the third rotor, and a side of the sixth magnetic member close to the fifth magnetic member protrudes from the fourth rotor.

The embodiment of the invention also provides a compressor, which comprises the rotor assembly.

The embodiment of the invention also provides an air conditioner which comprises the compressor.

According to the compressor provided by the embodiment of the invention, the first magnetic part and the second magnetic part are arranged between the first rotor structure of the rotor assembly and the bearing seat, so that a gap can be always kept between the first rotor structure and the bearing seat, and the first rotor structure and the bearing seat can be prevented from being rubbed and collided; through set up third magnetic part and fourth magnetic part between second rotor structure and bearing frame, can make and remain the clearance throughout between second rotor structure and the bearing frame, consequently can avoid second rotor structure and bearing frame to take place to wipe and bump. Therefore, the faults caused by the fact that the first rotor structure and/or the second rotor structure and the bearing seat rub against each other in the running process of the compressor can be avoided, and therefore structural stability of the rotor assembly can be improved, and stability of the compressor can be further improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of a compressor according to an embodiment of the present invention.

Fig. 2 is a first structural schematic diagram of a rotor assembly according to an embodiment of the present invention.

Fig. 3 is an enlarged partial view of the region a of the rotor assembly shown in fig. 2.

Fig. 4 is a second structural schematic diagram of the rotor assembly according to the embodiment of the present invention.

Fig. 5 is a third structural schematic diagram of a rotor assembly according to an embodiment of the present invention.

Fig. 6 is a fourth structural schematic diagram of the rotor assembly according to the embodiment of the present invention.

Fig. 7 is a schematic view of a fifth structure of the rotor assembly according to the embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a first magnetic element of a rotor assembly according to an embodiment of the present invention.

A compressor 100; a rotor assembly 10; a motor 20; a housing 30;

a first rotor structure 11; a second rotor structure 12; a bearing housing 13;

a first magnetic member 111; a second magnetic member 131; the third magnetic member 121; a fourth magnetic member 132; a fifth magnetic member 125; a sixth magnetic member 126;

a first rotating shaft 112; a first rotor 113; a second rotor 114; a second rotating shaft 122; a third rotor 123; a fourth rotor 124;

a first distance d 1; a second distance d 2; third distance d 3.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Embodiments of the present invention provide a compressor, which may be, for example, a screw compressor, a scroll compressor, or the like, and which may be applied to a fluid machine such as an air conditioner.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a compressor 100 according to an embodiment of the present invention. The compressor 100 includes a rotor assembly 10, a motor 20, and a housing 30. Wherein, the rotor assembly 10 is connected to the motor 20, and the motor 20 can drive the rotor assembly 10 to rotate. The rotor assembly 10 and the motor 20 are both mounted inside the housing 30.

Referring to fig. 2, fig. 2 is a first structural schematic diagram of the rotor assembly 10 according to the embodiment of the present invention. The rotor assembly 10 comprises a first rotor structure 11, a second rotor structure 12 and a bearing housing 13. Wherein the second rotor structure 12 meshes with the first rotor structure 11. The first rotor structure 11 may be connected to the motor 20, so that the motor 20 can drive the first rotor structure 11 to rotate, and the first rotor structure 11 drives the second rotor structure 12 to rotate. The bearing housing 13 is arranged on the side of the first rotor structure 11 and the second rotor structure 12 and is connected to the first rotor structure 11 and the second rotor structure 12. The bearing housing 13 is configured to support the first rotor structure 11 and the second rotor structure 12. For example, the bearing housing 13 may be provided with bearings, and support the first rotor structure 11 and the second rotor structure 12 via the bearings.

In some embodiments, as shown in fig. 2, one end of the first rotor structure 11 near the bearing seat 13 is provided with a first magnetic member 111, and one side of the bearing seat 13 near the first rotor structure 11 is provided with a second magnetic member 131. Wherein, the magnetic poles of the sides of the first magnetic member 111 and the second magnetic member 131 close to each other are the same. For example, the sides of the first magnetic element 111 and the second magnetic element 131 close to each other may be both S-poles or both N-poles. Therefore, a repulsive force may be generated between the first magnetic member 111 and the second magnetic member 131.

In some embodiments, the first magnetic element 111 is embedded in an end of the first rotor structure 11 close to the bearing seat 13. For example, a groove may be provided at an end of the first rotor structure 11 near the bearing seat 13, and then the first magnetic member 111 may be embedded in the groove.

The second magnetic member 131 is embedded in the bearing seat 13 at a side close to the first rotor structure 11. For example, a groove may be provided on the side of the bearing housing 13 adjacent to the first rotor structure 11, and then the second magnetic member 131 may be embedded in the groove.

In some embodiments, the first magnetic member 111 and the second magnetic member 131 may be magnetic rings.

It can be understood that, by embedding the first magnetic member 111 in the first rotor structure 11 and the second magnetic member 131 in the bearing seat 13, the installation stability of the first and second

magnetic members

111 and 131 in the rotor assembly 10 can be improved, and the installation space in the rotor assembly 10 can also be saved.

In some embodiments, referring to fig. 3, fig. 3 is an enlarged partial schematic view of the region a of the rotor assembly shown in fig. 2.

One side of the first magnetic member 111 close to the second magnetic member 131 protrudes from an end portion of the first rotor structure 11, which is an end of the first rotor structure 11 close to the bearing seat 13. In some embodiments, the first magnetic element 111 protrudes from the end of the first rotor structure 11 by a distance d2, and the distance d2 may be 0.2 mm, for example.

The side of the second magnetic member 131 close to the first magnetic member 111 protrudes from the side of the bearing seat 13, which is the side of the bearing seat 13 close to the first rotor structure 11. In some embodiments, the second magnetic member 131 protrudes from the side of the bearing seat 13 by a distance d3, and the distance d3 may be 0.2 mm, for example.

Wherein, the distance between the first magnetic member 111 and the second magnetic member 131 is d 1. When the rotor assembly 10 is not in operation, a gap exists between the first magnetic member 111 and the second magnetic member 131 due to the repulsive force existing between the first magnetic member 111 and the second magnetic member 131. In some embodiments, the distance d1 may be 0.1 millimeters when the rotor assembly 10 is not in operation.

Therefore, it can be understood that, when the rotor assembly 10 is not in operation, since a gap exists between the first magnetic member 111 and the second magnetic member 131, a gap also exists between the first rotor structure 11 and the bearing seat 13, so that the first rotor structure 11 and the bearing seat 13 can be prevented from being rubbed against each other, and the structural stability of the rotor assembly 10 can be improved.

In some embodiments, referring to fig. 4, fig. 4 is a second structural schematic diagram of the rotor assembly 10 according to the embodiment of the present invention.

Wherein, one end of the second rotor structure 12 close to the bearing seat 13 is provided with a third magnetic member 121. The side of the bearing housing 13 adjacent the second rotor structure 12 is provided with a fourth magnetic element 132. The magnetic poles of the sides of the third magnetic member 121 and the fourth magnetic member 132 close to each other are the same.

In some embodiments, the third magnetic element 121 is embedded in an end of the second rotor structure 12 close to the bearing housing 13. The fourth magnetic member 132 is embedded in the bearing housing 13 at a side close to the second rotor structure 12.

In some embodiments, a side of the third magnetic member 121 close to the fourth magnetic member 132 protrudes from an end of the second rotor structure 12. One side of the fourth magnetic member 132 close to the third magnetic member 121 protrudes out of the side of the bearing housing 13.

The specific arrangement of the third magnetic element 121 and the fourth magnetic element 132 may refer to the arrangement of the first magnetic element 111 and the second magnetic element 131, and is not described herein again. By providing the third magnetic member 121 and the fourth magnetic member 132, the second rotor structure 12 and the bearing seat 13 can be prevented from being rubbed against each other, and the structural stability of the rotor assembly 10 can also be improved.

In the rotor assembly 10 according to the embodiment of the present invention, only the first magnetic member 111 and the second magnetic member 131 may be provided, only the third magnetic member 121 and the fourth magnetic member 132 may be provided, or the first magnetic member 111, the second magnetic member 131, the third magnetic member 121, and the fourth magnetic member 132 may be provided at the same time.

In some embodiments, referring to fig. 5, fig. 5 is a schematic view illustrating a third structure of the rotor assembly 10 according to the embodiment of the present invention.

Wherein the number of bearing seats 13 is 2. The first rotor structure 11 and the second rotor structure 12 are provided with a bearing housing 13 on each of their opposite sides. Bearing blocks 13 are arranged on two opposite sides of the first rotor structure 11 and the second rotor structure 12, bearings are arranged on the bearing blocks 13, and the bearings on the bearing blocks 13 on two sides respectively support two sides of the first rotor structure 11 and the second rotor structure 12, so that the structural stability of the rotor assembly 10 can be improved.

It will be appreciated that when the first rotor structure 11 and the second rotor structure 12 are provided with one bearing housing 13 on each of opposite sides thereof, the first magnetic member 111 and the second magnetic member 131 may be provided between each bearing housing 13 and the first rotor structure 11, and the third magnetic member 121 and the fourth magnetic member 132 may be provided between each bearing housing 13 and the second rotor structure 12, as shown in fig. 5.

In some embodiments, referring to fig. 6, fig. 6 is a schematic diagram illustrating a fourth structure of the rotor assembly 10 according to an embodiment of the present invention.

The first rotor structure 11 includes a first rotating shaft 112, a first rotor 113, and a second rotor 114. The first rotor 113 and the second rotor 114 are coaxially disposed and are both disposed on the first rotating shaft 112. For example, the first rotor 113 and the second rotor 114 may be sleeved on the first rotating shaft 112 and fixedly connected or slidably connected with the first rotating shaft 112, so that the first rotor 113 and the first rotating shaft 112, and the second rotor 114 and the first rotating shaft 112 cannot rotate relatively. For example, the first rotor 113 and the first rotating shaft 112 may be clamped to each other to achieve relative fixation, and the second rotor 114 and the first rotating shaft 112 may also be clamped to each other to achieve relative fixation. Thus, the first rotor 113 and the second rotor 114 can rotate together with the first rotating shaft 112 about the axis of the first rotating shaft 112.

It is understood that the first rotating shaft 112 can be connected to the motor 20, so that the motor 20 can drive the first rotating shaft 112 to rotate, and the first rotating shaft 112 drives the first rotor 113 and the second rotor 114 to rotate around the axis of the first rotating shaft 112.

In the embodiment of the present invention, the first rotor 113 and the second rotor 114 have opposite screw threads. For example, the threads of the first rotor 113 may be threaded in a forward direction and the threads of the second rotor 114 may be threaded in a reverse direction. Alternatively, the threads of the first rotor 113 may be counter-threaded and the threads of the second rotor 114 may be forward-threaded.

In some embodiments, at least one of the first and

second rotors

113, 114 is integrally formed with the first shaft 112. For example, the first rotor 113 may be integrally formed with the first rotating shaft 112 by injection molding, the second rotor 114 may be integrally formed with the first rotating shaft 112 by injection molding, or the first rotor 113, the second rotor 114, and the first rotating shaft 112 may be integrally formed by injection molding as a whole. As can be appreciated, the integrally formed rotor and shaft has better structural stability, strength, and the like, and can improve the overall stability of the rotor assembly 10.

The second rotor structure 12 includes a second rotating shaft 122, a third rotor 123, and a fourth rotor 124. The third rotor 123 and the fourth rotor 124 are coaxially disposed and are both disposed on the second rotating shaft 122. For example, the third rotor 123 and the fourth rotor 124 can be sleeved on the second rotating shaft 122 and can be rotatably connected to the second rotating shaft 122, so that the third rotor 123 and the fourth rotor 124 can rotate around the axis of the second rotating shaft 122. The third rotor 123 and the fourth rotor 124 are slidable along the second rotation shaft 122.

It is understood that the first magnetic member 111 may be disposed on the first and

second rotors

113 and 114, and the third magnetic member 121 may be disposed on the third and

fourth rotors

123 and 124.

The first rotor 113 is engaged with the third rotor 123, and the third rotor 123 can be driven to rotate when the first rotor 113 rotates. The second rotor 114 is engaged with the fourth rotor 124, and the fourth rotor 124 can be driven to rotate when the second rotor 114 rotates. Therefore, the first rotor 113 and the second rotor 114 may be referred to as a male rotor, a driving rotor, and the like, and the third rotor 123 and the fourth rotor 124 may be referred to as a female rotor, a driven rotor, and the like. It is understood that, since the screw thread directions of the first rotor 113 and the second rotor 114 are opposite, the screw thread directions of the third rotor 123 and the fourth rotor 124 are also opposite.

In practical applications, when the compressor 100 is in operation, the motor 20 drives the first rotating shaft 112 to rotate, the first rotating shaft 112 drives the first rotor 113 and the second rotor 114 to rotate, the first rotor 113 drives the third rotor 123 to rotate through meshing, and the second rotor 114 drives the fourth rotor 124 to rotate through meshing. An air inlet may be formed between a portion of the first rotor 113 engaged with the third rotor 123 and adjacent to the second rotor 114 and the fourth rotor 124, and a portion of the second rotor 114 engaged with the fourth rotor 124 and adjacent to the first rotor 113 and the third rotor 123. The portion of the first rotor 113 that is engaged with the third rotor 123 and is far from the intake port may form an exhaust port, and the portion of the second rotor 114 that is engaged with the fourth rotor 124 and is far from the intake port may also form an exhaust port. Therefore, when the compressor 100 is operated, air can be sucked from the air inlet and exhausted from the air outlet, thereby compressing air.

It will be appreciated that when compressor 100 is in operation, the compressed air will exert a force on rotor assembly 10. Air is drawn in from the air inlet and then discharged from the air outlet, so that the compressed air generates a force directed from the air outlet to the air inlet to the first, second, third, and

fourth rotors

113, 114, 123, and 124. Therefore, the first rotor 113, the second rotor 114, the third rotor 123, and the fourth rotor 124 all move toward the air inlet, so that the first rotor 113 and the second rotor 114 approach each other, and the third rotor 123 and the fourth rotor 124 also approach each other. When the first rotor 113, the second rotor 114, the third rotor 123 and the fourth rotor 124 are provided with the magnetic members, the magnetic members are also driven to move together in the direction of the air inlet.

Therefore, when the compressor 100 is operated, the clearance between the first rotor structure 11 and the bearing housing 13 increases, and the clearance between the second rotor structure 12 and the bearing housing 13 also increases. Therefore, the first and

second rotor structures

11 and 12 can be prevented from rubbing against the bearing housing 13, thereby improving the structural stability of the rotor assembly 10.

In addition, it can be understood that, when the first rotor 113 and the second rotor 114 are asymmetric in structure due to manufacturing processes and the like, and the stress applied to the first rotor 113 and the second rotor 114 is different, the axial force applied to the first rotor 113 and the second rotor 114 cannot be completely cancelled, and at this time, the first rotor structure 11 is subjected to an axial force directed to the bearing seat 13, and the axial force is small. Since the first and second

magnetic members

111 and 131 are disposed between the first rotor structure 11 and the bearing housing 13, a repulsive force is generated between the first and second

magnetic members

111 and 131, and the repulsive force can cancel out the residual axial force on the first rotor structure 11. Thus, it is avoided that the first rotor structure 11 is moved towards the bearing housing 13 by an axial force directed towards the bearing housing 13, which results in a rubbing of the first rotor structure 11 against the bearing housing 13.

Similarly, when the third rotor 123 and the fourth rotor 124 are asymmetric in structure due to manufacturing processes and the like, the third rotor 123 and the fourth rotor 124 are stressed differently, and the axial force cannot be completely offset. At this time, since the third and fourth

magnetic members

121 and 132 are disposed between the second rotor structure 12 and the bearing housing 13, the remaining axial force is cancelled out by the repulsive force between the third and fourth

magnetic members

121 and 132. Therefore, it is avoided that the second rotor structure 12 is moved towards the bearing housing 13 by an axial force directed towards the bearing housing 13, which results in a rubbing of the second rotor structure 12 against the bearing housing 13.

In some embodiments, referring to fig. 7, fig. 7 is a schematic diagram illustrating a fifth structure of the rotor assembly 10 according to an embodiment of the present invention.

Wherein, one end of the third rotor 123 close to the fourth rotor 124 is provided with a fifth magnetic member 125. One end of the fourth rotor 124 near the third rotor 123 is provided with a sixth magnetic member 126. The magnetic poles of the sides of the fifth magnetic member 125 and the sixth magnetic member 126 that are close to each other are the same.

In some embodiments, the fifth magnetic member 125 is embedded in the third rotor 123. The sixth magnetic member 126 is embedded in the fourth rotor 124.

In some embodiments, a side of the fifth magnetic member 125 adjacent to the sixth magnetic member 126 protrudes from the third rotor 123. The sixth magnetic member 126 protrudes from the fourth rotor 124 on a side thereof adjacent to the fifth magnetic member 125.

The specific arrangement of the fifth magnetic element 125 and the sixth magnetic element 126 may refer to the arrangement of the first magnetic element 111 and the second magnetic element 131, and is not described herein again. Since the fifth magnetic material 125 and the sixth magnetic material 126 are provided, a gap can be maintained between the third rotor 123 and the fourth rotor 124, and thus, the third rotor 123 and the fourth rotor 124 can be prevented from being rubbed against each other, and thus, the structural stability of the rotor assembly 10 can be improved.

In some embodiments, referring to fig. 8, fig. 8 is a schematic structural diagram of the first magnetic element 111 of the rotor assembly 10 according to an embodiment of the present invention.

The first magnetic member 111 may be a magnetic ring, and the magnetic ring may be annular. It can be understood that in other embodiments, the magnetic ring may also be in a tooth shape, a star shape, etc., and only needs to keep the structural symmetry and balance during rotation.

It can be understood that the structures of the second magnetic element 131, the third magnetic element 121, the fourth magnetic element 132, the fifth magnetic element 125, and the sixth magnetic element 126 may be the same as the structure of the first magnetic element 111, and are not described herein again.

According to the compressor 100 provided by the embodiment of the invention, the first magnetic member 111 and the second magnetic member 131 are arranged between the first rotor structure 11 and the bearing seat 13 of the rotor assembly 10, so that a gap can be always kept between the first rotor structure 11 and the bearing seat 13, and the first rotor structure 11 and the bearing seat 13 can be prevented from being rubbed and collided; by providing the third magnetic member 121 and the fourth magnetic member 132 between the second rotor structure 12 and the bearing housing 13, a gap can be always maintained between the second rotor structure 12 and the bearing housing 13, and thus, the second rotor structure 12 and the bearing housing 13 can be prevented from being rubbed against each other. Therefore, it is possible to prevent the compressor 100 from malfunctioning due to the first/second rotor structures 11/12 rubbing against the bearing housing 13 during operation, and thus, the structural stability of the rotor assembly 10 can be improved.

An embodiment of the present invention further provides an air conditioner, which includes the compressor 100.

In the description of the present invention, it is to be understood that terms such as "first", "second", and the like are used merely for distinguishing between similar elements and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.

The rotor assembly, the compressor and the air conditioner provided by the embodiment of the invention are described in detail above. The principles and embodiments of this invention have been described herein using specific examples, which are set forth only to aid in the understanding of the invention. Meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A rotor assembly, comprising:

a first rotor structure;

a second rotor structure meshed with the first rotor structure;

2. The rotor assembly of claim 1, wherein:

the first magnetic piece is embedded in one end, close to the bearing seat, of the first rotor structure, and the second magnetic piece is embedded in one side, close to the first rotor structure, of the bearing seat; or/and

3. The rotor assembly of claim 2, wherein:

one side of the first magnetic part, which is close to the second magnetic part, protrudes out of the end part of the first rotor structure, and one side of the second magnetic part, which is close to the first magnetic part, protrudes out of the side of the bearing seat; or/and

4. A rotor assembly as claimed in any one of claims 1 to 3, wherein the number of bearing seats is two, one on each of opposite sides of the first and second rotor structures.

5. A rotor assembly as claimed in any one of claims 1 to 3, wherein:

the first rotor structure comprises a first rotor and a second rotor which are coaxially arranged, and the thread directions of the first rotor and the second rotor are opposite;

6. The rotor assembly according to claim 5, wherein one end of the third rotor close to the fourth rotor is provided with a fifth magnetic member, one end of the fourth rotor close to the third rotor is provided with a sixth magnetic member, and the magnetic poles of the sides of the fifth magnetic member and the sixth magnetic member close to each other are the same.

7. The rotor assembly of claim 6 wherein the fifth magnetic element is embedded in the third rotor and the sixth magnetic element is embedded in the fourth rotor.

8. The rotor assembly of claim 7 wherein a side of the fifth magnetic member adjacent to the sixth magnetic member protrudes from the third rotor, and a side of the sixth magnetic member adjacent to the fifth magnetic member protrudes from the fourth rotor.

9. A compressor comprising a rotor assembly as claimed in any one of claims 1 to 8.

10. An air conditioner characterized by comprising the compressor of claim 9.