CN216056504U - Stator module, magnetic suspension bearing, motor, compressor and air conditioner - Google Patents

Abstract

The application provides a stator module, magnetic suspension bearing, motor, compressor and air conditioner. The stator assembly comprises at least two iron core modules (1) and a heat conduction structure (2), wherein the at least two iron core modules (1) are arranged at intervals along the circumferential direction, the heat conduction structure (2) is located between the two adjacent iron core modules (1), at least part of the heat conduction structure (2) is provided with a cooling channel (3), and the cooling channel (3) is communicated to a central shaft hole (9) of the stator assembly. According to the stator module of this application, can effectively dispel the heat to magnetic bearing, avoid destroying magnetic bearing's stator structure simultaneously, guarantee magnetic bearing's quality.

Description

Stator module, magnetic suspension bearing, motor, compressor and air conditioner

Technical Field

The application relates to the technical field of magnetic suspension, in particular to a stator assembly, a magnetic suspension bearing, a motor, a compressor and an air conditioner.

Background

The magnetic suspension bearing is a bearing which utilizes electromagnetic force to support a rotor system to stably operate in a suspension manner. Compared with the traditional mechanical bearing, the magnetic suspension bearing has the excellent characteristics of no friction, no abrasion, no need of lubrication, high running rotating speed, long service life, low maintenance cost and the like, and has wide application prospect in the high-speed transmission fields of high-speed motors, high-speed electric spindles, high-speed flywheel energy storage systems and the like.

The magnetic suspension bearing suspends a rotor in a magnetic field by utilizing controllable electromagnetic force, the bearing has iron loss, copper loss and the like, the bearing is heated, the rotor is heated and expanded due to overheating of the bearing, structural parameters of the bearing are changed, an air gap of the bearing is influenced, and the mechanical strength of silicon steel sheets of a rotor iron core is influenced. At present, a bearing cooling structure is mainly used for directly cooling a coil in a hole of a bearing stator slot, and although the heating problem is relieved, the stator structure is easily damaged, and the quality of a magnetic suspension bearing is influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem that this application will be solved lies in providing a stator module, magnetic bearing, motor, compressor and air conditioner, can effectively dispel the heat to the magnetic bearing, avoids destroying the stator structure of magnetic bearing simultaneously, guarantees magnetic bearing's quality.

In order to solve the problem, the application provides a stator module, including two at least iron core modules and heat conduction structure, two at least iron core modules are arranged along circumference interval, and the heat conduction structure is located between two adjacent iron core modules, separates magnetism to two adjacent iron core modules, is provided with cooling channel on at least partial heat conduction structure, and cooling channel communicates to stator module's central shaft hole.

Preferably, the core module includes a yoke portion and a tooth portion, and the heat conductive structure protrudes radially from an inner circumferential wall of the yoke portion.

Preferably, the heat conducting structure is a heat conducting plate, and the heat conducting plate is located in the middle of the adjacent teeth.

Preferably, a tooth socket is formed between adjacent tooth parts, coils are wound in the tooth socket, the heat conduction structure is located between adjacent coils, the heat conduction structure extends along the radial direction of the iron core module, and the top end of the heat conduction structure, which extends towards the central shaft hole, is located on the radial inner side of the coils.

Preferably, the height of the top end of the heat conducting structure relative to the yoke is the same as the radial height of the tooth.

Preferably, at least one side of the heat conduction structure is provided with a flow guide hole communicated with the tooth socket, the flow guide hole is communicated with the cooling channel, and the flow guide hole is positioned on the radial outer side of the coil.

Preferably, the height of the heat conducting structure relative to the top end of the yoke is higher than the radial height of the tooth.

Preferably, a cooling channel is arranged on the single heat conduction structure, and the cooling channel is located at the axial middle position of the heat conduction structure; or, at least two cooling channels are arranged on the single heat conduction structure, and the at least two cooling channels are arranged at intervals along the axial direction of the iron core module.

Preferably, the heat conducting structure is made of magnetism isolating materials.

Preferably, the stator assembly further comprises a heat conduction sleeve, and the heat conduction sleeve is sleeved on the peripheries of the iron core module and the heat conduction structure and fixes the iron core module.

Preferably, the heat conducting sleeve is integrally formed with the heat conducting structure.

Preferably, the cooling channel penetrates the heat conducting jacket in the radial direction.

Preferably, the periphery of the heat conducting sleeve is provided with an annular flow passage, and each cooling passage is communicated with the annular flow passage.

Preferably, the heat conducting structure is made of a good heat conductor material.

Preferably, the heat conducting sleeve is made of a magnetism isolating material.

Preferably, the single core module includes two teeth, the circumferential widths of the two teeth being the same; or, the single iron core module comprises three teeth, and the circumferential width of the middle tooth is equal to the sum of the circumferential widths of the teeth on two sides.

Preferably, the stator assembly is an 8 pole, 12 pole or 16 pole.

According to another aspect of the present application, there is provided a magnetic suspension bearing, including a stator assembly as described above and a bearing rotor disposed within a central axial bore of the stator assembly.

According to another aspect of the present application, there is provided an electric machine including a stator assembly as described above and a bearing rotor disposed within a central axial bore of the stator assembly.

Preferably, the motor further comprises a front bearing housing, a rear bearing housing and a casing, wherein the front bearing housing and the rear bearing housing are respectively provided with a stator assembly, the casing is sleeved outside the front bearing housing and the rear bearing housing, the casing, the front bearing housing and the rear bearing housing are respectively provided with a fluid passage, and a cooling medium enters the cooling passage through the fluid passage.

According to another aspect of the present application, there is provided a compressor including the stator assembly described above or the magnetic bearing described above.

According to another aspect of the present application, there is provided an air conditioner including the stator assembly described above or the magnetic bearing described above.

The application provides a stator module, including two at least iron core modules and heat conduction structure, two at least iron core modules are arranged along circumference interval, and the heat conduction structure is located between two adjacent iron core modules, separates magnetism to two adjacent iron core modules, and at least partial heat conduction is structural to be provided with cooling channel, and cooling channel communicates to stator module's central shaft hole. In the stator assembly, the stator core is formed by adopting a mode that at least two iron core modules are arranged in a split mode, so that the modularization of the bearing stator core can be realized, the production and the maintenance and the replacement are convenient, and the bearing cost is reduced. The modularized iron core module is more convenient to realize winding, reduces the winding difficulty and improves the winding efficiency. The cooling channel is arranged on the heat conduction structure instead of the iron core module, so that effective heat dissipation of the magnetic suspension bearing can be realized, the problems of cracking, warping and the like of iron core laminations caused by punching on the stator iron core can be avoided, the stator iron core structure is effectively protected, and the quality of the magnetic suspension bearing is ensured.

Drawings

FIG. 1 is an exploded view of a magnetic bearing according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a magnetic suspension bearing according to an embodiment of the present application;

FIG. 3 is an exploded view of a magnetic bearing according to an embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of a magnetic suspension bearing according to an embodiment of the present application;

FIG. 5 is an exploded view of a magnetic bearing according to an embodiment of the present application;

FIG. 6 is a schematic cross-sectional view of a magnetic suspension bearing according to an embodiment of the present application;

FIG. 7 is an exploded view of a magnetic bearing according to an embodiment of the present application;

FIG. 8 is a schematic cross-sectional view of a magnetic suspension bearing according to an embodiment of the present application;

FIG. 9 is an exploded view of a magnetic bearing according to an embodiment of the present application;

FIG. 10 is a schematic cross-sectional view of a magnetic suspension bearing according to an embodiment of the present application;

FIG. 11 is an exploded view of a magnetic bearing according to an embodiment of the present application;

FIG. 12 is a schematic cross-sectional view of a magnetic suspension bearing according to an embodiment of the present application;

FIG. 13 is an exploded view of a magnetic bearing according to an embodiment of the present application;

FIG. 14 is a cross-sectional structural view of a magnetic suspension bearing according to an embodiment of the present application;

fig. 15 is a schematic cross-sectional view of a motor according to an embodiment of the present application.

The reference numerals are represented as:

1. an iron core module; 2. a heat conducting structure; 3. a cooling channel; 4. a yoke portion; 5. a tooth portion; 6. a coil; 7. a heat conducting sleeve; 8. an annular flow passage; 9. a central shaft hole; 10. a tooth socket; 11. a front end cover; 12. a displacement sensor; 13. radial protection; 14. a front bearing housing; 15. a front magnetic suspension bearing; 16. a housing; 17. a motor stator; 18. a rear magnetic suspension bearing; 19. a fluid channel; 20. a rear bearing housing; 21. a rear end cap; 22. a bearing rotor; 23. and (4) flow guide holes.

Detailed Description

Referring to fig. 1 to 15 in combination, according to an embodiment of the present application, the stator assembly includes at least two iron core modules 1 and a heat conducting structure 2, the at least two iron core modules 1 are arranged at intervals along a circumferential direction, the heat conducting structure 2 is located between two adjacent iron core modules 1, the two adjacent iron core modules 1 are magnetically isolated, at least part of the heat conducting structure 2 is provided with a cooling channel 3, and the cooling channel 3 is communicated to a central shaft hole 9 of the stator assembly.

In the stator assembly, the stator core is formed by adopting a mode that at least two iron core modules 1 are arranged in a split mode, so that the modularization of the bearing stator core can be realized, the production and the maintenance and the replacement are convenient, and the bearing cost is reduced. The modularized iron core module 1 is more convenient to realize winding, reduces the winding difficulty and improves the winding efficiency. Cooling channel 3 sets up on heat conduction structure 2, and does not set up on iron core module 1, can enough realize the effective heat dissipation to magnetic suspension bearing, can avoid punching the iron core lamination fracture, the fin scheduling problem that leads to again on stator core, effectively protects stator core structure, guarantees magnetic suspension bearing's quality.

In one embodiment, the heat conducting structure 2 is made of a magnetic isolating material. The iron core modules 1 are isolated from each other through the heat conduction structure 2, so that each iron core module 1 is an independent magnetic induction line loop, the heat conduction structure 2 is used for separating the magnetic induction line loops, the magnetic coupling and magnetic leakage phenomena of the bearing can be avoided, and the magnetic performance of the magnetic suspension bearing is improved.

In one embodiment, the core module 1 comprises a yoke 4 and teeth 5, the heat conducting structure 2 protruding radially from the inner circumferential wall of the yoke 4. In the embodiment, the heat conducting structure 2 protrudes from the inner peripheral wall of the yoke 4 in the radial direction, so that the outlet of the cooling channel 3 communicating with the central shaft hole 9 in the radial direction can be closer to the bearing rotor 22, the flow path of the cooling medium can be shortened, the blocking effect of the coil 6 on the flow of the cooling medium is reduced, the cooling medium can reach the bearing rotor 22 more effectively, a more effective cooling effect is formed on the bearing rotor 22, and the cooling effect on the magnetic suspension bearing is improved.

In one embodiment, the heat conducting structure 2 is a heat conducting plate, and the heat conducting plate is located in the middle of the adjacent teeth 5, so that the blocking effect of the coil 6 on the flow of the cooling medium can be more effectively reduced, and the flow efficiency of the cooling medium is improved.

In one embodiment, tooth slots 10 are formed between adjacent teeth 5, coils 6 are wound in the tooth slots 10, the heat conducting structure 2 is located between adjacent coils 6, the heat conducting structure 2 extends in a radial direction of the core module 1, and top ends of the heat conducting structure 2 extending toward the central axial hole 9 are located radially inside the coils 6. In the structure, the heat conducting structure 2 passes through the middle of two adjacent coils 6, and the outlet of the cooling channel 3 is located on the radial inner side of the coil 6, so that the coil 6 is located outside the flow path of the cooling medium, and no obstruction is caused to the flow of the cooling medium, so that the cooling medium can fully reach the surface of the bearing rotor 22, the bearing rotor 22 is effectively cooled, and the cooling effect is improved.

As a preferred embodiment, the height of the top end of the heat conducting structure 2 relative to the yoke portion 4 is the same as the radial height of the tooth portion 5, so that the distance between the outlet of the cooling channel 3 and the surface of the bearing rotor 22 can be shortened to the maximum extent without adversely affecting the stator-rotor clearance, and the cooling effect can be improved.

Referring to fig. 7 to 10 in combination, in one embodiment, at least one side of the heat conducting structure 2 is provided with a flow guiding hole 23 communicating with the tooth slot 10, the flow guiding hole 23 communicating with the cooling channel 3, the flow guiding hole 23 being located radially outside the coil 6. In the present embodiment, the guide holes 23 communicating with the cooling channel 3 are provided on the radially inner side of the coil 6, so that in the process of flowing the cooling medium along the cooling channel 3, a part of the cooling medium flows from the guide holes 23 to the radially outer side of the coil 6, and effectively cools the coil 6 and the tooth portion 5, and another part of the cooling medium flows from the outlet of the cooling channel 3 to the surface of the bearing rotor 22, and effectively cools the bearing rotor 22, thereby achieving a more effective cooling effect on both the stator and the rotor. As a preferred embodiment, the heat conducting structure 2 is provided with the guide holes 23 at both sides thereof, respectively, and the number of the guide holes 23 is at least two, so that the supply of the cooling medium can be simultaneously performed from both sides of the heat conducting structure 2 to more effectively cool the coil 6.

Referring to fig. 11 to 12 in combination, in an embodiment, the height of the top end of the heat conducting structure 2 relative to the yoke 4 is higher than the radial height of the tooth portion 5, so that the outlet of the cooling channel 3 on the heat conducting structure 2 is closer to the bearing rotor 22, it is easier to deliver the cooling medium to the surface of the bearing rotor 22 to cool the bearing rotor 22, and furthermore, since the heat conducting structure 2 protrudes from the inner side of the tooth portion 5 in the radial direction, when the bearing rotor 22 is abnormally dropped, the heat conducting structure 2 can play a role of radially protecting the magnetic suspension bearing, and the bearing stator is prevented from being damaged. Because heat conduction structure 2 itself can be dismantled and change, consequently even heat conduction structure 2 is impaired, also can change fast, can reduce change and cost of maintenance.

In one embodiment, a cooling channel 3 is disposed on a single heat conducting structure 2, and the cooling channel 3 is located at an axial middle position of the heat conducting structure 2, so that distribution uniformity of the cooling medium in the cooling channel 3 during outflow can be improved, and cooling uniformity can be improved.

In one embodiment, at least two cooling channels 3 are disposed on a single heat conducting structure 2, and the at least two cooling channels 3 are spaced along the axial direction of the core module 1, so as to provide more cooling medium for the bearing rotor 22, and further improve the cooling effect.

In one embodiment, the stator assembly further includes a heat conducting sleeve 7, and the heat conducting sleeve 7 is sleeved on the peripheries of the iron core module 1 and the heat conducting structure 2 and fixes the iron core module 1. Because stator core is made by the silicon steel sheet lamination, consequently the difficult assurance of excircle dimensional accuracy for stator core's assembly precision is lower. In this embodiment, since the heat conduction sleeve 7 is adopted to be sleeved on the periphery of the iron core module 1, compared with a stator iron core, the machining of the outer circle of the heat conduction sleeve 7 is easy, the machining precision is easy to guarantee, and therefore the bearing assembling precision can be effectively improved.

In one embodiment, the heat conducting sleeve 7 is made of a magnetic isolating material.

In addition, the periphery at iron core module 1 is established to heat conduction sleeve 7 cover, can use with heat conduction structure 2 cooperation, not only separates adjacent iron core module 1, can separate stator core and bearing housing moreover to can prevent effectively that the bearing magnetic field from leaking to bearing housing on, reduce or avoid the magnetic leakage phenomenon.

In an embodiment, the heat conducting sleeve 7 and the heat conducting plate of the heat conducting structure 2 are integrally formed, so that better structural strength between the heat conducting sleeve 7 and the heat conducting plate can be ensured, and the overall magnetic isolation effect of the structure formed by matching the heat conducting sleeve 7 and the heat conducting plate is better, and the magnetic leakage phenomenon is less likely to occur.

In one embodiment, the cooling channels 3 extend radially through the heat conducting jacket 7, so that the cooling channels 3 on the heat conducting structure 2 can be supplied with cooling medium via the cooling channels 3 on the heat conducting jacket 7, facilitating the transport of the cooling medium.

In other embodiments, a supply channel may also be added from the axial direction of the heat conducting structure 2, which supply channel may communicate with the cooling channel 3, through which the magnetic bearing may realize a cooling medium supply to the cooling channel 3 on the heat conducting structure 2.

In one embodiment, the outer circumference of the heat conducting sleeve 7 is provided with an annular flow channel 8, and each cooling channel 3 communicates with the annular flow channel 8. In this embodiment, since each cooling channel 3 is communicated with the annular flow channel 8, when the cooling medium is supplied, the cooling medium can be uniformly distributed through the annular flow channel 8 only by supplying the cooling medium into the annular flow channel 8, the structure is simpler, and the supply of the cooling medium is more convenient.

In one embodiment, the heat conducting structure 2 is made of a good heat conductor material, and the heat conducting structure 2 can conduct heat, so that the cooling medium flowing through the cooling channel 3 can also effectively dissipate heat of the iron core module 1 when flowing through the heat conducting structure 2, and further the cooling effect of the magnetic suspension bearing is improved.

In one embodiment, a single core module 1 comprises two teeth 5, the circumferential width of the two teeth 5 being the same.

In one embodiment, a single core module 1 comprises three teeth 5, the circumferential width of the middle tooth 5 being equal to the sum of the circumferential widths of the teeth 5 on both sides.

The stator assembly is 8, 12 or 16 pole.

The division manner of the iron core module 1 needs to be matched with the pole number of the stator assembly, for example, when the pole number of the stator assembly is an even number, the number of teeth included in a single iron core module 1 should be a multiple of 2, and when the pole number of the stator assembly is a multiple of 3, the number of teeth included in a single iron core module 1 should be a multiple of 3. Adopt this kind of mode to design stator module for the stator module of this application embodiment can adapt to on all magnetic suspension bearings that can adopt the block structure, and heat conduction structure 2's structure can be adjusted according to the block structure, only need be located between two adjacent blocks can.

Referring to fig. 3 and 4 in combination, in this embodiment, the stator assembly has an 8-pole structure, the bearing rotor 22 and the stator core are formed by laminating silicon steel sheets, the stator core is composed of a plurality of modular cores, the stator core is fixed in the heat-conducting sleeve 7, and the heat-conducting plate separates the core modules 1, and the connection modes between the core modules include, but are not limited to, screws, bolts, pin connections, interference fit heat assembly, welding, adhesive coating, and the like. The heat conduction sleeve 7 is provided with an annular flow passage 8, the heat conduction plate is provided with a cooling passage 3 extending in the radial direction, and the annular flow passage 8 and the cooling passage 3 are mutually connected and communicated and are used for introducing high-pressure cooling airflow to directly cool the bearing rotor 22; the position of the flow channel is not limited to the illustrated position, and the radially extending cooling passage 3 may be located between the two core modules 1.

Referring to fig. 5 and 6 in combination, in the present embodiment, the stator assembly has a 16-pole structure, the bearing rotor 22 and the stator core are formed by laminating silicon steel sheets, the stator core is composed of a plurality of modular cores, the stator core is fixed in the heat-conducting sleeve 7, and the core modules 1 are separated by the heat-conducting plate, and the connection modes between the core modules include, but are not limited to, screws, bolts, pin connections, interference fit thermal assembly, welding, adhesive coating, and the like. The heat conduction sleeve 7 is provided with an annular flow passage 8, the heat conduction plate is provided with a cooling passage 3 extending in the radial direction, and the annular flow passage 8 and the cooling passage 3 are mutually connected and communicated and are used for introducing high-pressure cooling airflow to directly cool the bearing rotor 22; the position of the flow channel is not limited to the illustrated position, and the radially extending cooling passage 3 may be located between the two core modules 1.

The heat conducting structure 2 and the heat conducting sleeve 7 are made of, for example, aluminum, copper, stainless steel or other magnetic-isolating metal alloy.

According to an embodiment of the present application, the magnetic levitation bearing includes a stator assembly, which is the above-described stator assembly, and a bearing rotor 22, the bearing rotor 22 being disposed within the central axial hole 9 of the stator assembly.

Referring collectively to fig. 7, according to an embodiment of the present application, an electric machine includes a stator assembly, which is the above-described stator assembly, and a bearing rotor 22, the bearing rotor 22 being disposed within a central axial bore 9 of the stator assembly.

In one embodiment, the motor further includes a front end cover 11, a displacement sensor 12, a radial protector 13, a front bearing housing 14, a front magnetic suspension bearing 15, a casing 16, a motor stator 17, a rear magnetic suspension bearing 18, a fluid passage 19, a rear bearing housing 20 and a rear end cover 21, the front magnetic suspension bearing 15 is disposed in the front bearing housing 14, the rear magnetic suspension bearing 18 is disposed in the rear bearing housing 20, the casing 16 is sleeved outside the front bearing housing 14 and the rear bearing housing 20, the casing 16, the front bearing housing 14 and the rear bearing housing 20 are respectively provided with the fluid passage 19, and a cooling medium enters the cooling passage 3 through the fluid passage 19.

In the present embodiment, at least one of the front magnetic bearing 15 and the rear magnetic bearing 18 employs the above-described magnetic bearing.

When the motor runs, the magnetic suspension bearing is electrified, the bearing rotor 22 is suspended by the controllable electromagnetic force of the magnetic suspension bearing, the suspension force is generated by the magnetic field formed by the plurality of modularized iron core modules 1, the plurality of modularized iron core modules 1 work independently, and the magnetic suspension bearing can be replaced independently when being damaged. After the power is switched on, a magnetic field is generated in the iron core module 1, each iron core module 1 is separated by the heat conducting sleeve 7 and the heat conducting plate, the heat conducting plate is used for isolating the magnetic coupling between the iron core modules 1, and the heat conducting sleeve 7 is used for preventing the magnetic field of the bearing stator from leaking to the bearing shell. The bearing rotor 22 generates heat due to iron loss, copper loss, and the like, and the bearing rotor 22 is directly cooled by passing a high-pressure cooling gas (which may be air, nitrogen, or the like for cooling) through the fluid passage 19 in the casing 16.

According to an embodiment of the present application, the compressor includes the stator assembly described above or the magnetic bearing described above.

According to an embodiment of the present application, an air conditioner includes the stator assembly described above or the magnetic bearing described above.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims (22)

1. The stator assembly is characterized by comprising at least two iron core modules (1) and a heat conduction structure (2), wherein the iron core modules (1) are arranged at intervals along the circumferential direction, the heat conduction structure (2) is located between the adjacent two iron core modules (1), at least part of the heat conduction structure (2) is provided with a cooling channel (3), and the cooling channel (3) is communicated to a central shaft hole (9) of the stator assembly.

2. A stator assembly according to claim 1, characterized in that the core module (1) comprises a yoke part (4) and a tooth part (5), the heat conducting structure (2) protruding radially from the inner circumferential wall of the yoke part (4).

3. Stator assembly according to claim 2, characterized in that the heat conducting structure (2) is a heat conducting plate, which is located in the middle of the adjacent teeth (5).

4. The stator assembly according to claim 2, characterized in that tooth slots (10) are formed between adjacent tooth portions (5), coils (6) are wound in the tooth slots (10), the heat conducting structure (2) is located between adjacent coils (6), the heat conducting structure (2) extends along the radial direction of the core module (1), and the top end of the heat conducting structure (2) extending to the central shaft hole (9) is located at the radial inner side of the coils (6).

5. Stator assembly according to claim 4, characterized in that the top height of the heat conducting structure (2) with respect to the yoke (4) is the same as the radial height of the teeth (5).

6. Stator assembly according to claim 4, characterized in that at least one side of the heat conducting structure is provided with flow guiding holes (23) communicating with the tooth slots (10), the flow guiding holes (23) communicating with the cooling channel (3), the flow guiding holes (23) being located radially outside the coils (6).

7. Stator assembly according to claim 4, characterized in that the height of the top end of the heat conducting structure (2) with respect to the yoke (4) is higher than the radial height of the teeth (5).

8. A stator assembly according to claim 1, characterized in that a single said heat conducting structure (2) is provided with one said cooling channel (3), said cooling channel (3) being located axially midway in said heat conducting structure (2); or, at least two cooling channels (3) are arranged on the single heat conduction structure (2), and the at least two cooling channels (3) are arranged along the axial direction of the iron core module (1) at intervals.

9. A stator assembly according to claim 1, characterized in that the heat conducting structure (2) is made of a magnetically isolating material.

10. The stator assembly according to any of the claims 1 to 9, characterized in that the stator assembly further comprises a heat conducting sleeve (7), the heat conducting sleeve (7) is sleeved on the outer circumference of the core module (1) and the heat conducting structure (2) and fixes the core module (1).

11. A stator assembly according to claim 10, characterized in that the heat conducting sleeve (7) is integrally formed with the heat conducting structure (2).

12. A stator assembly according to claim 11, characterized in that the cooling channels (3) run radially through the heat conducting jacket (7).

13. The stator assembly according to claim 12, characterized in that the outer circumference of the heat conducting jacket (7) is provided with an annular flow channel (8), and each cooling channel (3) communicates with the annular flow channel (8).

14. A stator assembly according to claim 1, characterized in that the heat conducting structure (2) is made of a good conductor material of heat.

15. A stator assembly according to claim 10, characterized in that the heat conducting sleeve (7) is made of a magnetically isolating material.

16. The stator assembly according to any of the claims 2 to 7, characterized in that a single core module (1) comprises two teeth (5), the circumferential width of the two teeth (5) being the same; or, the single iron core module (1) comprises three tooth parts (5), and the circumferential width of the tooth part (5) in the middle is equal to the sum of the circumferential widths of the tooth parts (5) on two sides.

17. The stator assembly of any of claims 1-9, characterized in that the stator assembly is an 8 pole, 12 pole, or 16 pole.

18. A magnetic suspension bearing comprising a stator assembly and a bearing rotor (22), characterized in that the stator assembly is a stator assembly according to any one of claims 1 to 17, the bearing rotor (22) being arranged in a central axial bore (9) of the stator assembly.

19. An electric machine comprising a stator assembly and a bearing rotor (22), characterized in that the stator assembly is a stator assembly according to any one of claims 1-17, the bearing rotor (22) being arranged in a central axial bore (9) of the stator assembly.

20. The electric machine according to claim 19, further comprising a front bearing housing (14), a rear bearing housing (20), and a casing (16), wherein the stator assembly is disposed in the front bearing housing (14) and the rear bearing housing (20), the casing (16) is sleeved outside the front bearing housing (14) and the rear bearing housing (20), the casing (16), the front bearing housing (14), and the rear bearing housing (20) are respectively provided with a fluid passage (19), and a cooling medium enters the cooling passage (3) through the fluid passage (19).

21. A compressor, characterized by comprising a stator assembly according to any of claims 1 to 17 or a magnetic suspension bearing according to claim 18.

22. An air conditioner comprising a stator assembly according to any of claims 1 to 17 or a magnetic suspension bearing according to claim 18.

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