CN113266644A - Stator assembly, magnetic suspension bearing and compressor - Google Patents
Stator assembly, magnetic suspension bearing and compressor Download PDFInfo
- Publication number
- CN113266644A CN113266644A CN202110686694.9A CN202110686694A CN113266644A CN 113266644 A CN113266644 A CN 113266644A CN 202110686694 A CN202110686694 A CN 202110686694A CN 113266644 A CN113266644 A CN 113266644A
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- Prior art keywords
- stator
- insulating
- flow channel
- cooling
- tooth
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0444—Details of devices to control the actuation of the electromagnets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/048—Active magnetic bearings for rotary movement with active support of two degrees of freedom, e.g. radial magnetic bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
- F16C37/005—Cooling of bearings of magnetic bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The application provides a stator module, magnetic suspension bearing and compressor. This stator module includes stator core (1) and skeleton (2), stator core (1) includes stator tooth (3) and stator slot (4), stator skeleton (2) are including insulating yoke portion (5) and insulating tooth portion (6), insulating yoke portion (5) are connected with insulating tooth portion (6), insulating tooth portion (6) parcel is outside stator tooth (3), insulating tooth portion (6) are including the tooth's socket of installation stator tooth (3), be provided with first cooling runner (7) on at least one stator skeleton (2), the one end that first cooling runner (7) were kept away from in stator skeleton (2) is provided with import runner (8), import runner (8) and first cooling runner (7) intercommunication, first cooling runner (7) communicate to the centre bore of stator core (1). According to the stator module of the application, the rotor of the magnetic suspension bearing can be effectively cooled, and the operation reliability of the magnetic suspension bearing is improved.
Description
Technical Field
The application relates to the technical field of magnetic suspension, in particular to a stator assembly, a magnetic suspension bearing and a compressor.
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 rotor has high running speed, and the magnetic suspension rotor can do magnetic induction line cutting motion in the electromagnetic field due to the existence of the electromagnetic field, so that large eddy current loss is generated on the rotor. In addition, the friction between the magnetic suspension rotor rotating at high speed and air also generates large wind mill loss. These losses are concentrated at the surface of the magnetically levitated rotor, which generates a large amount of heat, causing the magnetically levitated rotor to expand and deform. The deformation of the magnetic suspension rotor can destroy the dynamic balance and the structural strength of the rotor, and the rotor deformation causes the change of the structural size, which can cause the change of the air gap between the magnetic suspension stator and the rotor, so that the control parameters of the magnetic suspension bearing are changed, the instability of the rotor operation is caused, and the mechanical equipment is seriously damaged.
Disclosure of Invention
Therefore, the technical problem that this application will be solved lies in providing a stator module, magnetic suspension bearing and compressor, can effectively dispel the heat to magnetic suspension bearing's rotor, improves magnetic suspension bearing operational reliability.
In order to solve the problem, the application provides a stator module, including stator core and the stator skeleton of setting at the stator core both ends, stator core includes stator tooth and stator slot, stator skeleton includes insulating yoke portion and insulating tooth portion, insulating yoke portion is connected with insulating tooth portion, insulating tooth portion parcel is outside the stator tooth, insulating tooth portion is including the tooth's socket of installation stator tooth, the tooth's socket on at least one stator skeleton is provided with first cooling runner on keeping away from the terminal surface of tank bottom, the one end that first cooling runner was kept away from to stator skeleton is provided with the import runner, import runner and first cooling runner intercommunication, first cooling runner communicates to stator core's centre bore.
Preferably, the insulation yoke portion comprises an annular connecting portion and insulation sections, the insulation sections and the insulation tooth portions are connected to the annular connecting portion and are alternately arranged along the circumferential direction of the annular connecting portion, and the insulation sections are located in the stator slots.
Preferably, the inlet flow channel is arranged on the insulating yoke portion and penetrates through the insulating yoke portion along the axial direction of the stator core, a second cooling flow channel is arranged on the end face, away from the annular connecting portion, of the insulating section, and the inlet flow channel is communicated with the first cooling flow channel through the second cooling flow channel.
Preferably, the end faces of two side walls of the tooth slot are provided with first cooling flow channels, and the second cooling flow channels on the insulating section extend along the circumferential direction and are communicated with the first cooling flow channels on two adjacent side walls of the insulating section.
Preferably, each second cooling channel corresponds to one inlet channel.
Preferably, the stator frameworks at two ends of the stator core are respectively provided with a first cooling flow channel and/or an inlet flow channel.
Preferably, the stator frameworks at the two ends of the stator core are respectively provided with a first cooling flow channel, the stator frameworks at the two ends of the stator core are in sealed butt joint, and the first cooling flow channels on the stator frameworks at the two ends correspond to each other in position and are combined into a sealed cooling flow channel.
Preferably, the inlet channel is arranged on the insulating tooth section, and the inlet channel axially penetrates through the tooth slot side wall of the insulating tooth section to be provided with the first cooling channel.
According to another aspect of the present application, there is provided a magnetic suspension bearing comprising a stator assembly as described above.
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 stator core and the stator skeleton of setting at the stator core both ends, stator core includes stator tooth and stator slot, stator skeleton includes insulating yoke portion and insulating tooth portion, insulating yoke portion is connected with insulating tooth portion, insulating tooth portion parcel is outside the stator tooth, insulating tooth portion is including the tooth's socket of installation stator tooth, the tooth's socket on at least one stator skeleton is provided with first cooling runner on keeping away from the terminal surface of tank bottom, the one end that first cooling runner was kept away from to stator skeleton is provided with the import runner, import runner and first cooling runner intercommunication, first cooling runner communicates to stator core's centre bore. This stator module can form the cooling runner on stator skeleton, can supply the cooling medium circulation for cooling medium can flow to the rotor subassembly surface through the cooling runner, effectively cools off rotor subassembly, thereby effectively improves magnetic suspension bearing's operating stability.
Drawings
FIG. 1 is a schematic cross-sectional view of a magnetic suspension bearing according to an embodiment of the present application;
FIG. 2 is an exploded view of a magnetic bearing according to an embodiment of the present application;
fig. 3 is a schematic cross-sectional structure diagram of a magnetic suspension bearing according to an embodiment of the present application.
The reference numerals are represented as:
1. a stator core; 2. a stator frame; 3. stator teeth; 4. a stator slot; 5. an insulating yoke portion; 6. an insulating tooth portion; 7. a first cooling flow passage; 8. an inlet flow channel; 9. an annular connecting portion; 10. an insulating section; 11. a second cooling flow channel; 12. a rotor assembly.
Detailed Description
With reference to fig. 1 to 3, according to an embodiment of the present application, the stator assembly includes a stator core 1 and stator frames 2 disposed at two ends of the stator core 1, the stator core 1 includes stator teeth 3 and stator slots 4, the stator frame 2 includes an insulating yoke portion 5 and an insulating tooth portion 6, the insulating yoke portion 5 is connected to the insulating tooth portion 6, the insulating tooth portion 6 is wrapped outside the stator teeth 3, the insulating tooth portion 6 includes tooth slots for mounting the stator teeth 3, a first cooling flow channel 7 is disposed on an end surface of the tooth slots of at least one stator frame 2, the end of the stator frame 2, which is far away from the tooth slots, is provided with an inlet flow channel 8, the inlet flow channel 8 is communicated with the first cooling flow channel 7, and the first cooling flow channel 7 is communicated to a central hole of the stator core 1.
This stator module can form the cooling runner on stator skeleton 2, can supply the cooling medium circulation for cooling medium can reach stator rotor clearance department through first cooling runner 7, cools off rotor subassembly 12, can effectively dispel the heat to magnetic suspension bearing's rotor subassembly 12, improves magnetic suspension bearing operational reliability.
In this embodiment, since the stator frame 2 is already provided with the cooling flow channel for cooling the rotor assembly 12, the stator core 1 does not need to be provided with the cooling flow channel, and the structure of the stator core 1 is not damaged, so that the magnetic circuit of the stator core 1 can be prevented from being affected, and the working performance of the magnetic suspension bearing is ensured. In addition, compared with the cooling flow channel processed on the stator core 1, the cooling flow channel processed on the stator framework 2 is easier to realize, lower in cost and higher in processing efficiency.
In one embodiment, the insulating yoke portion 5 comprises an annular connecting portion 9 and insulating segments 10, the insulating segments 10 and the insulating teeth 6 are connected to the annular connecting portion 9 and are alternately arranged along the circumferential direction of the annular connecting portion 9, and the insulating segments 10 are located in the stator slots 4. In the present embodiment, the insulating segments 10 are disposed in the stator slots 4 of the stator core 1 for forming an insulating isolation between the yoke portion of the stator core 1 and the coil windings, thereby improving electrical safety and improving magnetic performance of the coil. The annular connecting portion 9 can be used as a mounting base, so that the stator framework 2 can be kept as an integral structure, and meanwhile, the setting positions of the insulating tooth portions 6 and the insulating sections 10 can meet the requirements of the stator assembly. Annular connecting portion 9 can also be along axial salient in stator core 1, not only conveniently processes the cooling runner and sets up the connection port on stator skeleton 2, still makes things convenient for the external cooling pipeline to install on annular connecting portion 9.
In one embodiment, the inlet flow channel 8 is arranged on the insulating yoke portion 5 and penetrates through the insulating yoke portion 5 along the axial direction of the stator core 1, the end face of the insulating section 10 away from the annular connecting portion 9 is provided with a second cooling flow channel 11, and the inlet flow channel 8 is communicated with the first cooling flow channel 7 through the second cooling flow channel 11. In the present embodiment, the inlet flow channel 8 penetrates through the insulating yoke portion 5 in the axial direction, and thus can communicate with the second cooling flow channel 11 provided on the end surface of the insulating section 10, while the second cooling flow channel 11 communicates with the first cooling flow channel 7, so that after entering the stator frame 2 from the inlet flow channel 8, the cooling medium can flow from the second cooling flow channel 11 to the first cooling flow channel 7, and then flow to the stator-rotor gap through the first cooling flow channel 7, and the rotor assembly 12 is effectively cooled. Because stator frame 2 installs on stator core 1 after, first cooling runner 7 and second cooling runner 11 on stator frame 2 all are located stator core 1's axial middle part, consequently make behind cooling medium from first cooling runner 7 outflow, can reach rotor assembly 12's air gap middle part position, consequently can form more even cooling effect to rotor assembly 12.
In one embodiment, the end faces of two side walls of the tooth slot are provided with first cooling flow channels 7, and the second cooling flow channels 11 on the insulating section 10 extend along the circumferential direction and are communicated with the first cooling flow channels 7 on two adjacent side walls of the insulating section 10. After reaching the second cooling flow channel 11 through the inlet flow channel 8, the cooling medium flows from the circumferential direction of the second cooling flow channel 11 to both sides, and further reaches the stator-rotor gap through the first cooling flow channels 7 on both circumferential sides of the second cooling flow channel 11, thereby cooling the rotor assembly 12.
In one embodiment, each second cooling flow channel 11 corresponds to one inlet flow channel 8, and since one second cooling flow channel 11 is arranged on each insulating section 10 of each insulating yoke portion 5, which is equivalent to that each insulating section 10 is correspondingly provided with one inlet flow channel 8 for conveying a cooling medium, each inlet flow channel 8, the second cooling flow channel 11 communicated with the inlet flow channel 8 and the first cooling flow channel 7 form one cooling flow channel unit, and the plurality of cooling flow channel units are uniformly distributed at intervals along the circumferential direction of the stator core 1, so that uniform cooling of the rotor assembly 12 is realized.
In one embodiment, the second cooling channels 11 may be provided in part of the insulating segments 10, and the second cooling channels 11 are not provided in part of the insulating segments 10, in which case, only the end portions of the side walls of the insulating teeth 6 adjacent to the insulating segments 10 are provided with the first cooling channels 7.
In one embodiment, the stator frame 2 at both ends of the stator core 1 is provided with first cooling channels 7 and/or inlet channels 8.
In one embodiment, the stator frame 2 at the first end of the stator core 1 is provided with a first cooling flow channel 7 and an inlet flow channel 8, the stator frame 2 at the second end is provided with only the inlet flow channel 8, the inlet flow channel 8 is communicated with the first cooling flow channel 7 at the first end, and the inlet flow channels 8 on the stator frames 2 at the two ends of the stator core 1 simultaneously supply the cooling medium to the first cooling flow channels 7.
In one embodiment, the stator frame 2 at the first end of the stator core 1 is provided with a first cooling flow channel 7, the stator frame 2 at the second end is provided with only an inlet flow channel 8, and the inlet flow channel 8 is communicated with the first cooling flow channel 7 at the first end to supply the cooling medium to the first cooling flow channel 7.
In one embodiment, the stator frame 2 at the first end of the stator core 1 is provided with a first cooling flow channel 7 and an inlet flow channel 8, the stator frame 2 at the second end is provided with a first cooling flow channel 7 and an inlet flow channel 8, and the cooling medium can enter the respective first cooling flow channel 7 through the respective inlet flow channel 8 on the stator frames 2 at the two ends and then enter the stator-rotor gap to cool the rotor assembly 12.
In one embodiment, the stator frames 2 at two ends of the stator core 1 are provided with the first cooling flow channels 7, the stator frames 2 at two ends of the stator core 1 are in sealed butt joint, and the first cooling flow channels 7 on the stator frames 2 at two ends correspond in position and are combined into a sealed cooling flow channel. The cooling medium flows in through the inlet channel 8, flows through the sealed cooling channel, and is sprayed to the surface of the rotor assembly 12 along the outlet of the cooling channel close to the surface of the rotor assembly 12 to cool the rotor assembly, so that the technical problem of heat generation of the bearing rotor due to loss can be effectively solved.
The first cooling flow channel 7 may extend in a radial direction of the stator teeth 3 so as to be capable of vertically spraying the surface of the rotor assembly 12 to cool the rotor assembly 12.
In one embodiment, the inlet channel 8 is arranged on the insulating tooth 6, and the inlet channel 8 is arranged axially through the insulating tooth 6 on the slot side wall of the first cooling channel 7. In this embodiment, the second cooling flow channel is not required to be provided, and the cooling medium is supplied to the first cooling flow channel 7 directly through the inlet flow channel 8, so that the air supply pressure is higher and the cooling effect is better.
Referring collectively to fig. 1-3, according to an embodiment of the present application, a magnetic suspension bearing includes a stator assembly, which is the stator assembly described above.
The magnetic suspension bearing comprises a stator core 1, stator frameworks 2, a bearing coil and a rotor assembly 12, wherein the stator core 1 is of an annular tooth space structure, a plurality of stator teeth 3 and stator grooves 4 are distributed in a staggered manner along the circumference, the stator frameworks 2 are injection molding parts with similar structures to the stator core 1, and are provided with a plurality of tooth space insulators corresponding to the stator grooves of the stator core 1, the two stator frameworks 2 are symmetrically sleeved on two end faces of the stator core 1 of the magnetic suspension bearing, and the stator grooves 4 of the stator core 1 can be completely wrapped to form an insulating layer between the bearing coil and the stator core 1; the bearing coil passes stator skeleton 2 and stator core 1's notch, and the coiling lets in controllable electric current on the tooth's socket is insulating in the bearing coil, can provide controllable magnetic attraction for radial magnetic suspension bearing, acts on rotor subassembly 12, realizes rotor subassembly 12's suspension control.
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 (10)
1. The stator assembly is characterized by comprising a stator core (1) and stator frameworks (2) arranged at two ends of the stator core (1), wherein the stator core (1) comprises stator teeth (3) and stator slots (4), the stator frameworks (2) comprise insulating yoke parts (5) and insulating tooth parts (6), the insulating yoke parts (5) are connected with the insulating tooth parts (6), the insulating tooth parts (6) are wrapped outside the stator teeth (3), the insulating tooth parts (6) comprise tooth sockets for mounting the stator teeth (3), at least one of the tooth sockets on the stator framework (2) is provided with a first cooling flow channel (7) on the end surface far away from the bottom of the groove, one end, far away from the first cooling flow channel (7), of the stator framework (2) is provided with an inlet flow channel (8), and the inlet flow channel (8) is communicated with the first cooling flow channel (7), the first cooling flow channel (7) is communicated to a central hole of the stator core (1).
2. The stator assembly according to claim 1, characterized in that the insulating yoke (5) comprises an annular connection (9) and insulating segments (10), the insulating segments (10) and the insulating teeth (6) are connected to the annular connection (9) and are arranged alternately in the circumferential direction of the annular connection (9), and the insulating segments (10) are located in the stator slots (4).
3. The stator assembly according to claim 2, characterized in that the inlet flow channel (8) is arranged on the insulating yoke portion (5) and penetrates through the insulating yoke portion (5) in the axial direction of the stator core (1), a second cooling flow channel (11) is arranged on an end surface of the insulating section (10) far away from the annular connecting portion (9), and the inlet flow channel (8) is communicated with the first cooling flow channel (7) through the second cooling flow channel (11).
4. A stator assembly according to claim 3, characterized in that the first cooling flow channels (7) are provided on the end faces of both side walls of the tooth slot, and the second cooling flow channels (11) on the insulating section (10) extend in the circumferential direction and communicate with the first cooling flow channels (7) on both side walls adjacent to the insulating section (10).
5. The stator assembly of claim 4, characterized in that each of said second cooling channels (11) corresponds to one of said inlet channels (8).
6. The stator assembly according to claim 1, characterized in that the stator frame (2) at both ends of the stator core (1) is provided with the first cooling flow channels (7) and/or the inlet flow channels (8).
7. The stator assembly according to claim 6, characterized in that the first cooling channels (7) are arranged on the stator frames (2) at both ends of the stator core (1), the stator frames (2) at both ends of the stator core (1) are in sealed butt joint, and the first cooling channels (7) on the stator frames (2) at both ends correspond in position and are combined into a sealed cooling channel.
8. The stator assembly according to claim 1, characterized in that the inlet flow channel (8) is arranged on the insulating tooth (6), the inlet flow channel (8) being arranged axially through the insulating tooth (6) with the slot side walls of the first cooling flow channel (7).
9. Magnetic bearing comprising a stator assembly, characterized in that the stator assembly is a stator assembly according to any of claims 1 to 8.
10. A compressor, characterized by comprising a stator assembly according to any of claims 1 to 8 or a magnetic suspension bearing according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110686694.9A CN113266644A (en) | 2021-06-21 | 2021-06-21 | Stator assembly, magnetic suspension bearing and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110686694.9A CN113266644A (en) | 2021-06-21 | 2021-06-21 | Stator assembly, magnetic suspension bearing and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113266644A true CN113266644A (en) | 2021-08-17 |
Family
ID=77235654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110686694.9A Pending CN113266644A (en) | 2021-06-21 | 2021-06-21 | Stator assembly, magnetic suspension bearing and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113266644A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022267452A1 (en) * | 2021-06-21 | 2022-12-29 | 珠海格力电器股份有限公司 | Stator frame, magnetic bearing, compressor, and air conditioner |
| CN117424366A (en) * | 2023-12-19 | 2024-01-19 | 珠海格力电器股份有限公司 | Cooling structure and motor with same |
-
2021
- 2021-06-21 CN CN202110686694.9A patent/CN113266644A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022267452A1 (en) * | 2021-06-21 | 2022-12-29 | 珠海格力电器股份有限公司 | Stator frame, magnetic bearing, compressor, and air conditioner |
| CN117424366A (en) * | 2023-12-19 | 2024-01-19 | 珠海格力电器股份有限公司 | Cooling structure and motor with same |
| CN117424366B (en) * | 2023-12-19 | 2024-03-15 | 珠海格力电器股份有限公司 | Cooling structure and motor with same |
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