CN112564399A - Magnetic suspension bearing, motor, compressor and air conditioner - Google Patents
Magnetic suspension bearing, motor, compressor and air conditioner Download PDFInfo
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- CN112564399A CN112564399A CN202011293970.7A CN202011293970A CN112564399A CN 112564399 A CN112564399 A CN 112564399A CN 202011293970 A CN202011293970 A CN 202011293970A CN 112564399 A CN112564399 A CN 112564399A
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- bearing
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- displacement detection
- detection device
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The application provides a magnetic suspension bearing, a motor, a compressor and an air conditioner. The magnetic suspension bearing comprises a thrust bearing (1), axial bearing stators (2) and an axial displacement detection device (3), wherein the axial displacement detection device (3) is used for detecting the axial position of the thrust bearing (1), the axial bearing stators (2) are respectively arranged at the two axial ends of the thrust bearing (1), the axial displacement detection device (3) is arranged on at least one of the axial bearing stators (2), a mounting hole (4) is formed in at least one of the axial bearing stators (2) along the axial direction, a plastic sealing column (5) is encapsulated in the mounting hole (4), and the axial displacement detection device (3) and the axial bearing stators (2) form an integrated structure through the plastic sealing column (5). According to the magnetic suspension bearing, the control precision of the magnetic suspension bearing can be improved, and the working performance of the magnetic suspension bearing is improved.
Description
The application is a divisional application of Chinese patent application with the application number of 201910395606.2, named as 'magnetic suspension bearing, motor, compressor and air conditioner', filed by '2019, 5, month and 13'.
Technical Field
The application belongs to the technical field of air conditioning, and particularly relates to a magnetic suspension bearing, a motor, a compressor and an air conditioner.
Background
The magnetic suspension bearing has the characteristics of no mechanical contact, no need of lubrication, high critical rotating speed, long service life, high reliability and the like, and is widely applied to the fields of high speed and ultrahigh speed. The sensor is an indispensable part of a magnetic suspension system, the detection precision of the sensor is very important, the position detection precision of the magnetic suspension system is improved, and the overall performance and the service life of the system can be improved.
The existing magnetic suspension bearing system adopts a sensing actuation separation mode, and the basic structure of the system comprises a main shaft, an axial displacement sensor, an axial position detection disc, a rotor thrust disc, an axial bearing iron core and an axial bearing coil.
The axial bearing stators are arranged on two sides of the rotor thrust disc, the axial displacement sensor for detecting the axial displacement of the rotor is arranged on the left end face of the shaft, and the sensor and the bearing are separately installed. When the main shaft generates axial displacement, the sensor converts the detected displacement change into a signal and transmits the signal to the system, and then the output of the axial bearing is controlled to enable the shaft to return to a safe position.
However, for such a structure, since the distance between the axial position of the rotor detected by the axial sensor and the axial position of the thrust disc is relatively large, the axial position of the rotor detected by the axial sensor may not be consistent with the actual axial clearance data of the thrust bearing, which may affect the control accuracy of the system and further reduce the working performance of the magnetic suspension bearing.
Disclosure of Invention
Therefore, the technical problem to be solved by the application is to provide a magnetic suspension bearing, a motor, a compressor and an air conditioner, which can improve the control precision of the magnetic suspension bearing and improve the working performance of the magnetic suspension bearing.
In order to solve the problems, the application provides a magnetic suspension bearing, including footstep bearing, axial bearing stator and axial displacement detection device, axial displacement detection device is used for detecting the axial position of footstep bearing, be provided with the axial bearing stator respectively at the axial both ends of footstep bearing, be provided with axial displacement detection device on at least one of them axial bearing stator, be provided with the mounting hole along the axial on at least one of them axial bearing stator, the embedment has the plastic envelope post in the mounting hole, axial displacement detection device passes through the plastic envelope post and forms integrated structure with the axial bearing stator.
Preferably, one end of the axial bearing stator, which is far away from the thrust bearing, is provided with a wire outlet circuit board, and the wire outlet circuit board is provided with a avoidance hole corresponding to the plastic package column.
Preferably, an outlet terminal is arranged on the outlet circuit board, and an outlet of the axial displacement detection device is connected to the outlet terminal through the outlet circuit board.
Preferably, the outgoing line circuit board adopts a multi-layer PCB structure.
Preferably, the axial displacement detecting means is plural, and the plural axial displacement detecting means are provided on the axial bearing stator in the circumferential direction.
According to another aspect of the present application, there is provided an electric machine comprising a magnetic bearing, the magnetic bearing being the magnetic bearing described above.
According to another aspect of the present application, there is provided a compressor comprising a magnetic bearing, wherein the magnetic bearing is the magnetic bearing described above.
According to another aspect of the present application, there is provided an air conditioner comprising a magnetic suspension bearing, wherein the magnetic suspension bearing is the magnetic suspension bearing described above.
The application provides a magnetic suspension bearing, including footstep bearing, axial bearing stator and axial displacement detection device, axial displacement detection device is used for detecting footstep bearing's axial position, axial bearing stator is provided with respectively at footstep bearing's axial both ends, be provided with axial displacement detection device on at least one of them axial bearing stator, be provided with the mounting hole along the axial on at least one of them axial bearing stator, the embedment has the plastic envelope post in the mounting hole, axial displacement detection device passes through the plastic envelope post and forms integrated structure with the axial bearing stator. This magnetic suspension bearing will measure and form the integral structure between axial displacement detection device and the axial bearing stator of footstep bearing's axial position, do not need independent axial arrangement axial displacement detection device, and the data that axial displacement detection device detected is the actual clearance between axial bearing stator and the footstep bearing promptly, can make axial displacement detection device's detection data unanimous with the footstep bearing actual clearance, the control accuracy has been improved, the axial length who sets up axial displacement detection device need not to increase simultaneously, main shaft length and quality can be reduced, the dynamic performance of main shaft is improved, the integrated level and the control accuracy of magnetic suspension bearing have been promoted.
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 a schematic perspective view of a magnetic suspension bearing according to an embodiment of the present application;
FIG. 3 is an exploded view of a magnetic suspension bearing according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a single-sided axial bearing stator of a magnetic suspension bearing according to an embodiment of the present application;
fig. 5 is an enlarged schematic view of a portion a of fig. 4.
The reference numerals are represented as:
1. a thrust bearing; 2. an axial bearing stator; 3. an axial displacement detecting device; 4. mounting holes; 5. plastic packaging the column; 6. a wire outlet circuit board; 7. an outlet terminal; 8. a stator core; 9. and a stator coil.
Detailed Description
Referring to fig. 1 to 5 in combination, according to an embodiment of the present application, a magnetic suspension bearing includes a thrust bearing 1, axial bearing stators 2 and an axial displacement detection device 3, the axial displacement detection device 3 is used for detecting an axial position of the thrust bearing 1, the axial bearing stators 2 are respectively disposed at two axial ends of the thrust bearing 1, the axial displacement detection device 3 is disposed on at least one of the axial bearing stators 2, and the axial displacement detection device 3 and the axial bearing stator 2 where the axial displacement detection device is located are of an integrated structure.
This magnetic suspension bearing will measure and form the integral structure between axial displacement detection device 3 and the axial bearing stator 2 of footstep bearing 1's axial position, do not need independent axial arrangement axial displacement detection device 3, and the data that axial displacement detection device 3 detected are the actual clearance between axial bearing stator 2 and the footstep bearing 1 promptly, can make axial displacement detection device 3's detection data unanimous with footstep bearing 1 actual clearance, the control accuracy has been improved, simultaneously need not to increase the main shaft axial length who sets up axial displacement detection device 3, main shaft length and quality can be reduced, the dynamics performance of main shaft is improved, the integration and the control accuracy of magnetic suspension bearing have been promoted.
At least one of the axial bearing stators 2 is provided with a mounting hole 4 along the axial direction, and the axial displacement detection device 3 is positioned in the mounting hole 4 and forms an integrated structure with the axial bearing stator 2 through the mounting hole 4. The mounting hole 4 extends in the axial direction of the axial bearing stator 2, so that the axial displacement detection device 3 is conveniently mounted in the mounting hole 4 and forms an integrated structure with the axial bearing stator 2 in the mounting hole 4.
Generally speaking, the axial displacement detection device 3 adopts an axial displacement sensor, the axial displacement sensor is arranged along the axial direction to sense the axial displacement of the thrust bearing 1, therefore, the mounting hole 4 is made to be consistent with the extending direction of the mounting hole 4 and the sensing direction of the axial displacement sensor along the axial direction, and the mounting and positioning of the axial displacement sensor are more convenient. Because the mounting hole 4 is seted up on the axial bearing stator 2, consequently can make full use of the structural feature of axial bearing stator 2, realize integrating between axial bearing stator 2 and the axial displacement detection device 3, avoided the extra volume of axial displacement detection device 3 to occupy, structural design is more reasonable, need not additionally increase the axial length of other structures, has reduced main shaft length on the whole. The axial displacement sensor is, for example, an eddy current sensor.
The axial displacement detection device 3 may be mounted in the mounting hole 4 by welding, gluing, filling, or potting, as long as the axial displacement detection device 3 and the axial bearing stator 2 are integrated.
The mounting hole 4 may be a through hole.
The mounting hole 4 may also be a blind hole, and when the mounting hole 4 is a blind hole, the opening of the mounting hole 4 faces the thrust bearing 1, so that the sensing end of the axial displacement detection device 3 can face the thrust bearing 1.
In the present embodiment, the axial displacement detection device 3 is housed in the mounting hole 4. When the axial displacement detection device 3 is mounted on the axial bearing stator 2, the axial displacement detection device 3 is firstly arranged in the mounting hole 4 and positioned, and then the potting adhesive is filled into the mounting hole 4, so that the axial displacement detection device 3 is packaged in the mounting hole 4 through the potting adhesive and forms an integrated structure with the axial bearing stator 2.
The mounting hole 4 is internally encapsulated with a plastic-encapsulated column 5, and the axial displacement detection device 3 and the axial bearing stator 2 form an integrated structure through the plastic-encapsulated column 5. After encapsulating axial displacement detection device 3 in mounting hole 4, can form plastic envelope post 5 in mounting hole 4, plastic envelope post 5 is supported by epoxy or other casting glue that hardness is high to guarantee that the mounted position of axial displacement detection device 3 in mounting hole 4 is more accurate, it is more accurate to footstep bearing 1's axial displacement testing result. Preferably, in the present embodiment, after the axial displacement detection device 3 is encapsulated in the axial bearing stator 2 through the plastic encapsulation column 5, the end of the sensing end of the axial displacement detection device 3 is flush with the end face of the axial bearing stator 2 facing the thrust bearing 1, and accurate axial clearance data of the thrust bearing 1 and the axial bearing stator 2 can be directly acquired.
Preferably, an outlet wire of the axial displacement detection device 3 extends out of the axial bearing stator 2 from one end of the plastic package column 5 far away from the thrust bearing 1 through the plastic package column 5. Because the outgoing line of the axial displacement detection device 3 passes through the mounting hole 4 and is fixed through the plastic package column 5, the axial displacement detection device 3 can be conveniently wired, the problem of messy lines is avoided, the wiring space is saved, and the wiring can be effectively positioned and protected.
In this embodiment, an outlet circuit board 6 is disposed at an end of the axial bearing stator 2 away from the thrust bearing 1, and an avoiding hole is disposed on the outlet circuit board 6 corresponding to the plastic package post 5. The outgoing line circuit board 6 is fixedly arranged on the axial bearing stator 2, the avoiding hole is formed in the outgoing line circuit board 6, when the axial displacement detection device 3 is encapsulated, the plastic packaging column 5 can be formed in the avoiding hole at the same time, interference of the outgoing line circuit board 6 on the formation of the plastic packaging column 5 is avoided, the outgoing line circuit board 6 and the axial bearing stator 2 can be fixed through the plastic packaging column 5, integration between the outgoing line circuit board 6 and the axial bearing stator 2 is further achieved, and the structure is more compact and stable.
Preferably, an outlet terminal 7 is arranged on the outlet circuit board 6, and the outlet of the axial displacement detection device 3 is connected to the outlet terminal 7 through the outlet circuit board 6. Because the outgoing lines of the axial displacement detection device 3 and the outgoing lines of the axial bearing stator 2 are uniformly distributed on the same outgoing line circuit board 6, the number of outgoing line terminals of the system can be reduced, the connection structure is simplified, the structure cost is reduced, and the connection quality is improved.
Preferably, the outgoing line circuit board 6 adopts a multi-layer PCB structure, which can play a role in shielding and protecting weak current circuits.
Preferably, the axial displacement detecting means 3 is plural, and the plural axial displacement detecting means 3 are uniformly provided on the axial bearing stator 2 in the circumferential direction.
The axial displacement detection device 3 can be only arranged on the axial bearing stator 2 at one axial side of the thrust bearing 1, and the axial displacement detection devices 3 can also be respectively arranged on the axial bearing stators 2 at two axial sides of the thrust bearing 1, so that the axial displacement of the thrust bearing 1 can be detected from two sides of the thrust bearing 1 at the same time, and the detection precision is further improved.
The axial bearing stator 2 comprises a stator core 8 and a stator coil 9, a wire slot is arranged on the stator core 8, the stator coil 9 is embedded in the wire slot, and the axial displacement detection device 3 is arranged on the radial outer side of the wire slot of the stator core 8. The axial displacement detection device 3 is arranged on the radial outer side of the wire slot of the stator core 8, so that the structure of the stator core 8 can be reasonably utilized, the influence of the axial displacement detection device 3 on the magnetic induction structure of the axial bearing stator 2 can be avoided, and the magnetic induction effect of the magnetic suspension bearing is ensured.
The working principle of the magnetic suspension bearing is as follows:
the axial displacement sensor is responsible for detecting the axial displacement of the thrust bearing 1, and when the system operates normally, a set gap is kept between the thrust bearing 1 and the axial bearing stators 2 on the two sides; when the thrust bearing 1 is displaced axially to one side, the axial displacement sensor transmits detected data to the system controller, and the system controller controls the axial position of the thrust bearing 1 by adjusting the input current of the axial bearing stator 2, so that the thrust bearing 1 and the axial bearing stator 2 are prevented from colliding axially, and the safe and stable operation of the whole magnetic suspension system is ensured.
The axial displacement sensor is encapsulated in the axial bearing stator 2, the detection data of the sensor is the actual gap between the axial bearing stator 2 and the thrust bearing 1, so that the detection data of the sensor is consistent with the actual gap between the thrust bearing 1 and the axial bearing stator 2, the control precision is improved, the length and the quality of the main shaft are reduced, and the dynamic performance of the main shaft is improved.
According to an embodiment of the application, the motor comprises a magnetic bearing, which is the magnetic bearing described above.
According to an embodiment of the present application, the compressor comprises a magnetic bearing, which is the above-mentioned magnetic bearing.
According to an embodiment of the present application, the air conditioner includes a magnetic bearing, which is the above-mentioned magnetic bearing.
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 (8)
1. The utility model provides a magnetic suspension bearing, its characterized in that includes footstep bearing (1), axial bearing stator (2) and axial displacement detection device (3), axial displacement detection device (3) are used for detecting the axial position of footstep bearing (1) the axial both ends of footstep bearing (1) are provided with respectively axial bearing stator (2) at least one of them be provided with on axial bearing stator (2) axial displacement detection device (3), at least one of them axial bearing stator (2) is gone up and is provided with mounting hole (4) along the axial, the embedment has plastic envelope post (5) in mounting hole (4), axial displacement detection device (3) pass through plastic envelope post (5) with axial bearing stator (2) form the integral structure.
2. The magnetic suspension bearing according to claim 1, wherein one end of the axial bearing stator (2) far away from the thrust bearing (1) is provided with an outgoing line circuit board (6), and an avoidance hole is arranged on the outgoing line circuit board (6) corresponding to the plastic sealing column (5).
3. Magnetic suspension bearing according to claim 2, characterized in that the outgoing line circuit board (6) is provided with an outgoing line terminal (7), and the outgoing line of the axial displacement detection device (3) is connected to the outgoing line terminal (7) through the outgoing line circuit board (6).
4. Magnetic suspension bearing according to claim 3, characterized in that the outgoing circuit board (6) is of a multi-layer PCB structure.
5. Magnetic bearing according to any of claims 1 to 4, characterized in that the axial displacement detection means (3) are plural, the plural axial displacement detection means (3) being arranged circumferentially on the axial bearing stator (2).
6. An electric machine comprising a magnetic bearing, characterized in that the magnetic bearing is a magnetic bearing according to any of claims 1 to 5.
7. Compressor comprising magnetic bearings, characterized in that said magnetic bearings are magnetic bearings according to any one of claims 1 to 5.
8. An air conditioner comprising a magnetic bearing, wherein the magnetic bearing is the magnetic bearing of any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011293970.7A CN112564399B (en) | 2019-05-13 | 2019-05-13 | Magnetic suspension bearing, motor, compressor and air conditioner |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011293970.7A CN112564399B (en) | 2019-05-13 | 2019-05-13 | Magnetic suspension bearing, motor, compressor and air conditioner |
| CN201910395606.2A CN110165823A (en) | 2019-05-13 | 2019-05-13 | Magnetic suspension bearing, motor, compressor and air conditioner |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910395606.2A Division CN110165823A (en) | 2019-05-13 | 2019-05-13 | Magnetic suspension bearing, motor, compressor and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112564399A true CN112564399A (en) | 2021-03-26 |
| CN112564399B CN112564399B (en) | 2022-05-17 |
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Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910395606.2A Pending CN110165823A (en) | 2019-05-13 | 2019-05-13 | Magnetic suspension bearing, motor, compressor and air conditioner |
| CN202011293970.7A Active CN112564399B (en) | 2019-05-13 | 2019-05-13 | Magnetic suspension bearing, motor, compressor and air conditioner |
| CN202011293978.3A Active CN112564400B (en) | 2019-05-13 | 2019-05-13 | Magnetic suspension bearing, motor, compressor and air conditioner |
| CN202011293950.XA Pending CN112564398A (en) | 2019-05-13 | 2019-05-13 | Magnetic suspension bearing, motor, compressor and air conditioner |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910395606.2A Pending CN110165823A (en) | 2019-05-13 | 2019-05-13 | Magnetic suspension bearing, motor, compressor and air conditioner |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011293978.3A Active CN112564400B (en) | 2019-05-13 | 2019-05-13 | Magnetic suspension bearing, motor, compressor and air conditioner |
| CN202011293950.XA Pending CN112564398A (en) | 2019-05-13 | 2019-05-13 | Magnetic suspension bearing, motor, compressor and air conditioner |
Country Status (2)
| Country | Link |
|---|---|
| CN (4) | CN110165823A (en) |
| WO (1) | WO2020228333A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165823A (en) * | 2019-05-13 | 2019-08-23 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, motor, compressor and air conditioner |
| CN111059148A (en) * | 2019-12-27 | 2020-04-24 | 珠海格力电器股份有限公司 | Axial magnetic suspension bearing, motor, compressor and air conditioner |
| CN113949224B (en) * | 2021-09-29 | 2024-02-13 | 南京磁谷科技股份有限公司 | Rotating speed detection device and method for magnetic suspension high-speed motor |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112564400A (en) | 2021-03-26 |
| CN110165823A (en) | 2019-08-23 |
| CN112564399B (en) | 2022-05-17 |
| WO2020228333A1 (en) | 2020-11-19 |
| CN112564400B (en) | 2022-05-17 |
| CN112564398A (en) | 2021-03-26 |
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