CN214499794U - Low-loss radial magnetic suspension bearing system - Google Patents
Low-loss radial magnetic suspension bearing system Download PDFInfo
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- CN214499794U CN214499794U CN202120635594.9U CN202120635594U CN214499794U CN 214499794 U CN214499794 U CN 214499794U CN 202120635594 U CN202120635594 U CN 202120635594U CN 214499794 U CN214499794 U CN 214499794U
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Abstract
The utility model discloses a low-loss radial magnetic suspension bearing system, its structure includes stator clamping ring, lower stator clamping ring, stator magnetic ring, goes up stator module, lower stator module and rotor subassembly, it is the same with lower stator module structure to go up stator module, the tooth magnetic field polarity of going up stator module is the N utmost point, the tooth magnetic field polarity of stator module is the S utmost point down, goes up stator module and the equal closure of tooth inner circle of the magnetic bearing inner stator of stator module down, and every tooth portion all is equipped with at least two-layer coil winding. The winding form of the bearing system improves the coverage rate of the enameled wire on the stator slot of the magnetic bearing, and meanwhile, the process is low in realization difficulty, not only can the performance be optimized, but also the mass production can be facilitated. Because the inner ring of the tooth pole of the stator is also closed, the magnetic field distribution in the rotor is more uniform, and the sudden change of the magnetic field intensity can not be generated at the position where the tooth pole is not closed.
Description
Technical Field
The utility model relates to a magnetic suspension bearing field, specific low-loss radial magnetic suspension bearing system that says so.
Background
For a magnetic suspension motor system, the compactness of the magnetic suspension bearing system and the manufacturability of the system are both worthy of deep optimization. In the conventional magnetic bearing rotor, the magnetic field direction of the stator magnetic poles is distributed to NSSNNSSN, so that the iron loss caused by the abrupt change of the internal magnetic field direction of the rotor in the rotation process is increased.
The thicker the winding used by the magnetic bearing stator, the smaller the winding resistance, and the smaller the heating loss generated under the rated working condition. The traditional magnetic suspension bearing stator cannot use enameled wires to cover all notches due to the manufacturing process so as to reduce the winding resistance and reduce the copper loss of the system. The inner circle tooth part of the traditional magnetic suspension bearing stator is not closed, 8 tooth pole magnetic fields are distributed in NSSNNSSN mode, the direction of an internal magnetic field of a bearing rotor silicon steel sheet is alternated in the rotating process, the direction of an NS magnetic field is changed in a reciprocating mode, and high hysteresis loss and eddy current loss are easily generated on the rotor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a low-loss radial magnetic suspension bearing system solves magnetic suspension bearing stator slot low-usage, and coil resistance is big, the serious problem of generating heat after the circular telegram work. The system is low in process realization difficulty, convenient for batch production, high in coverage rate of the stator notch and capable of reducing system loss.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a low-loss radial magnetic suspension bearing system, its structure includes last stator clamping ring, lower stator clamping ring, stator magnetic ring, goes up stator module, lower stator module and rotor subassembly, the rotor subassembly is coaxial with last stator module and lower stator module, go up stator clamping ring, last stator module, stator magnetic ring, lower stator module and lower stator clamping ring and pass through the fastener top-down and establish ties fixedly, it is the same with lower stator module structure to go up stator module, the tooth magnetic field of going up stator module is the N utmost point, the tooth magnetic field of stator module is the S utmost point down, goes up the tooth inner circle of the magnetic bearing inner stator of stator module and lower stator module and all closes, and every tooth all is equipped with at least two-layer coil winding.
Further, the upper stator assembly comprises a magnetic bearing outer stator, a magnetic bearing inner stator, a coil insulation framework assembly and a coil winding assembly, the magnetic bearing inner stator is movably buckled with the inner ring of the magnetic bearing outer stator, the tooth part of the magnetic bearing inner stator is provided with the coil insulation framework assembly, and the coil winding assembly is arranged in the coil insulation framework assembly.
Furthermore, a plurality of inner stator tooth parts are uniformly arranged on the outer circumference of the closed inner ring of the magnetic bearing inner stator, and the free end of each inner stator tooth part is respectively provided with a buckle clamped with the outer stator of the magnetic bearing.
Further, the coil insulation framework component comprises a framework main body and a coil slot, the framework main body is sleeved with the tooth part of the inner stator of the magnetic bearing, and the coil slot wound with the coil winding is arranged between the adjacent partition plates of the framework main body.
Further, the number of the coil slots is at least two.
Further, the rotor assembly comprises a rotor sleeve, a rotor magnetic ring, an upper magnetic bearing rotor and a lower magnetic bearing rotor, the rotor sleeve is coaxial with the inner stators of the upper stator assembly and the lower stator assembly, the rotor magnetic ring is sleeved in the middle of the rotor sleeve and is in interference fit with the middle of the rotor sleeve, the upper magnetic bearing rotor and the lower magnetic bearing rotor are respectively sleeved on the upper end and the lower end of the rotor sleeve and are in interference fit with the upper end and the lower end of the rotor sleeve, and the upper magnetic bearing rotor, the rotor magnetic ring and the lower magnetic bearing rotor are tightly attached to each other in the axial direction.
Furthermore, the inner ring of the outer stator of the magnetic bearing is provided with a clamping groove corresponding to the tooth part of the inner stator.
The utility model has the advantages that:
the utility model discloses a bearing system's winding form has improved the coverage rate of enameled wire to magnetic bearing stator slot, and the technology realizes that the degree of difficulty is low simultaneously, can optimize the performance, can make things convenient for batch production again. Because the stator tooth pole magnetic field presents that upper end NNNNNN arranges, lower extreme SSSSSSSS arranges, the bearing rotor is at rotatory in-process, and the magnetic field can not alternate, has greatly reduced the eddy current loss. And the inner ring of the tooth pole of the stator is also closed, so that the magnetic field distribution in the rotor is more uniform, the sudden change of the magnetic field intensity cannot be generated at the position where the tooth pole is not closed, and the magnetic hysteresis loss and the eddy current loss of the magnetic bearing rotor can be increased by the sudden change of the magnetic field intensity and the magnetic field direction.
Drawings
Fig. 1 is an overall isometric view of the present invention;
FIG. 2 is an exploded view of the overall installation of the present invention;
FIG. 3 is a schematic view of the internal structure of FIG. 1;
FIG. 4 is a front view of FIG. 1;
FIG. 5 is a cross-sectional view A-A of FIG. 4;
FIG. 6 is an exploded view of the upper stator assembly;
FIG. 7 is a schematic structural diagram of a coil insulation framework;
FIG. 8 is a schematic structural view of the outer stator of the magnetic bearing;
FIG. 9 is a schematic structural view of the inner stator of the magnetic bearing;
fig. 10 is an exploded view of the rotor assembly.
In the figure:
1 upper stator compression ring, 2 rotor assembly, 21 rotor sleeve, 22 rotor magnetic ring, 23 magnetic bearing upper rotor, 24 magnetic bearing lower rotor, 3 upper stator assembly, 31 magnetic bearing outer stator, 311 outer stator main body, 312 clamping groove, 32 magnetic bearing inner stator, 321 inner stator tooth part, 322 buckle, 323 through hole, 33 coil insulation framework assembly, 331 framework main body, 332 coil groove, 34 coil winding assembly, 4 lower stator assembly, 5 lower stator compression ring, 6 stator magnetic ring, 7 fastener.
Detailed Description
The following detailed description of a low-loss radial magnetic bearing system according to the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1 to fig. 10, the utility model discloses a low-loss radial magnetic suspension bearing system, including last stator clamping ring 1, lower stator clamping ring 5, stator magnetic ring 6, go up stator module 3, lower stator module 4 and rotor subassembly 2, rotor subassembly 2 is coaxial with last stator module 3 and lower stator module 4, it is fixed to go up stator clamping ring 1, go up stator module 3, stator magnetic ring 6, lower stator module 4 and lower stator clamping ring 5 and establish ties through fastener 7 top-down, and fastener 7 can adopt the screw, and screw one end passes stator clamping ring 1 in proper order, goes up stator module 3, stator magnetic ring 6, lower stator module 4 and lower stator clamping ring 5 forms a whole, constitutes magnetic bearing stator part dress. The upper stator assembly 3 and the lower stator assembly 4 are identical in structure, the polarity of the magnetic field of the teeth of the upper stator assembly 3 is N pole, the polarity of the magnetic field of the teeth of the lower stator assembly 4 is S pole, the magnetic field of the bearing rotor can not be alternated in the rotating process, and the eddy current loss is greatly reduced. Inner rings of tooth parts of the magnetic bearing inner stators of the upper stator assembly and the lower stator assembly are closed, and each tooth part is provided with at least two layers of coil windings. The closed inner ring enables the magnetic field distribution in the rotor to be more uniform, the sudden change of the magnetic field intensity cannot be generated at the position where the tooth part is not closed, and the magnetic hysteresis loss and the eddy current loss of the magnetic bearing rotor can be increased by the sudden change of the magnetic field intensity and the magnetic field direction.
As shown in fig. 6, the upper stator assembly 3 includes a magnetic bearing outer stator 31, a magnetic bearing inner stator 32, a coil insulation frame assembly 33 and a coil winding assembly 34, the magnetic bearing inner stator 32 is movably fastened to an inner ring of the magnetic bearing outer stator 31, a coil insulation frame assembly 33 is disposed on a tooth portion of the magnetic bearing inner stator 32, and the coil insulation frame assembly is formed by a plurality of frame bodies respectively sleeved on the corresponding tooth portions. The coil winding assembly 34 is arranged in the coil insulation framework assembly 33, and the coil winding assembly is wound by a plurality of coils which respectively correspond to the positions and the number of the coil winding assemblies of each framework main body. A plurality of inner stator tooth parts 321 are uniformly arranged on the outer circumference of the closed inner ring of the magnetic bearing inner stator 32, and a buckle 322 clamped with the magnetic bearing outer stator 31 is respectively arranged at the free end of each inner stator tooth part 321. As shown in fig. 9, eight inner stator teeth 321 are uniformly arranged on the outer circumference of the closed inner ring of the magnetic bearing inner stator 32, the free ends of the eight inner stator teeth 321 are provided with buckles 322, and the magnetic fields of the eight inner stator teeth are N-poles. Eight inner stator tooth parts are uniformly arranged on the outer circumference of the closed inner ring of the magnetic bearing inner stator of the lower stator assembly 4, and the magnetic fields of the eight inner stator tooth parts are S poles.
The coil insulation frame 33 assembly comprises a frame main body 331 and a coil slot 332, the frame main body 331 is sleeved with the teeth of the magnetic bearing inner stator 32, and the coil slot 332 wound with coil windings is arranged between adjacent partition plates of the frame main body 331. The number of the coil slots 332 is at least two, and the specific number can be set differently according to the use requirement. The coil is wound in the coil grooves, and the winding diameter of the winding in each coil groove is different. For a magnetic bearing stator, the thicker the used winding, the smaller the winding resistance, and the smaller the heating loss generated under the rated working condition. The traditional magnetic suspension bearing stator cannot use enameled wires to cover all notches due to the manufacturing process so as to reduce the winding resistance and reduce the copper loss of the system. And the utility model discloses a set up insulating skeleton and improved the coverage rate of enameled wire to magnetic bearing stator slot, the technology realizes that the degree of difficulty is low simultaneously, can optimize the performance, can make things convenient for batch production again.
As shown in fig. 10, the rotor assembly 2 includes a rotor sleeve 21, a rotor magnetic ring 22, an upper magnetic bearing rotor 23 and a lower magnetic bearing rotor 24, the rotor sleeve 21 is coaxial with the inner stators of the upper stator assembly 3 and the lower stator assembly 1, the rotor magnetic ring 22 is sleeved in the middle of the rotor sleeve 21 and is in interference fit with the rotor sleeve 21, the upper magnetic bearing rotor 23 and the lower magnetic bearing rotor 24 are respectively sleeved in the upper end and the lower end of the rotor sleeve 21 and are in interference fit with the rotor sleeve 21, and the upper magnetic bearing rotor 23, the rotor magnetic ring 22 and the lower magnetic bearing rotor 24 are axially and tightly attached to each other. The upper rotor of the magnetic bearing 23 and the lower rotor of the magnetic bearing 24 are both silicon steel sheets, and the rotor sleeve 21 and the rotor magnetic conductive ring 22 are made of magnetic conductive carbon steel.
The inner ring of the outer stator main body 311 of the magnetic bearing outer stator 31 is provided with a clamping groove 312 corresponding to the tooth part of the inner stator, and the inner stator is clamped with the clamping groove 312 through a clamping buckle 322 at the end part of the tooth part when being installed with the outer stator, so that the inner stator is embedded into the outer stator, and the firmness of assembly is ensured.
The magnetic field distribution in operation is as above:
the magnetic force lines of the upper stator flow into the inner part from the outside, the upper tooth magnetic field is distributed into NNNNNNNN, the magnetic force lines of the lower stator flow out of the inner part and point to the outside, and the lower tooth magnetic field is distributed into SSSSSSSSSS. The direction of the magnetic field of the rotor does not change suddenly during the rotation process. Thereby reducing hysteresis loss and eddy current loss of the rotor material itself.
The working principle is as follows:
as shown in fig. 2, the upper stator assembly 3 includes 8 teeth poles, and each two teeth poles constitute one direction of N-pole magnetic force generator. The lower stator assembly 4 includes 8 teeth poles, and each two teeth poles constitute one directional S-pole magnetic force generator. The 4 teeth poles corresponding to the upper and lower ends jointly form a magnetic force generator in one direction of the system. The magnetic force direction is X + X-Y + Y-in four directions of a two-dimensional plane coordinate system. When the magnetic force in the X + direction is required, the two upper-end teeth poles and the two lower-end teeth poles form the illustrated magnetic field distribution, and as shown in fig. 5, a larger current is applied to the upper half portion of the drawing to generate a larger magnetic flux density, and the larger magnetic flux density generates a larger magnetic force. The lower half part is not electrified or is electrified little to form smaller magnetic density and generate smaller magnetic force. The unbalance of the magnetic force forms the magnetic force of resultant force in one direction, so that the rotor can adjust the position during rotation according to the change of the magnetic force, and the function and the purpose of the magnetic suspension bearing are achieved.
The foregoing is merely illustrative of some of the principles of the present invention and the description is not intended to limit the invention to the specific constructions and applications shown, so that all modifications and equivalents that may be utilized are within the scope of the invention.
Other technical features than those described in the specification are known to those skilled in the art.
Claims (7)
1. The utility model provides a low-loss radial magnetic suspension bearing system, includes stator clamping ring, lower stator clamping ring, stator magnetic ring, goes up stator module, stator module and rotor subassembly down, the rotor subassembly is coaxial with last stator module and stator module down, it is fixed that last stator clamping ring, last stator module, stator magnetic ring, lower stator module and lower stator clamping ring pass through fastener top-down and establish ties, characterized by, it is the same with stator module structure down to go up stator module, the tooth magnetic field polarity of going up stator module is the N utmost point, stator module 'S tooth magnetic field polarity is the S utmost point down, goes up the tooth inner circle of stator module and lower stator module' S magnetic bearing inner stator and all closes, and every tooth all is equipped with at least two-layer coil winding.
2. The low-loss radial magnetic suspension bearing system as claimed in claim 1, wherein said upper stator assembly comprises a magnetic bearing outer stator, a magnetic bearing inner stator, a coil insulation frame assembly and a coil winding assembly, said magnetic bearing inner stator is movably fastened to an inner ring of the magnetic bearing outer stator, a tooth portion of said magnetic bearing inner stator is provided with the coil insulation frame assembly, and said coil winding assembly is disposed in the coil insulation frame assembly.
3. The low loss radial magnetic suspension bearing system as claimed in claim 1 or 2, wherein the closed inner ring of the magnetic bearing inner stator has a plurality of inner stator teeth uniformly arranged on the outer circumference thereof, and the free end of each inner stator tooth is provided with a buckle for clamping with the outer stator of the magnetic bearing.
4. The low loss radial magnetic bearing system of claim 2, wherein the coil insulation frame assembly comprises a frame body and a coil slot, the frame body is sleeved with the teeth of the inner stator of the magnetic bearing, and the coil slot wound with the coil winding is arranged between the adjacent partition plates of the frame body.
5. A low loss radial magnetic bearing system as claimed in claim 4 wherein the number of coil slots is at least two.
6. The low-loss radial magnetic suspension bearing system as claimed in claim 1, wherein the rotor assembly comprises a rotor sleeve, a rotor magnetic ring, an upper magnetic bearing rotor and a lower magnetic bearing rotor, the rotor sleeve is coaxial with the inner stators of the upper and lower stator assemblies, the rotor magnetic ring is sleeved and in interference fit with the middle of the rotor sleeve, the upper magnetic bearing rotor and the lower magnetic bearing rotor are respectively sleeved and in interference fit with the upper and lower ends of the rotor sleeve, and the upper magnetic bearing rotor, the rotor magnetic ring and the lower magnetic bearing rotor are axially and tightly attached.
7. A low loss radial magnetic bearing system as claimed in claim 2 wherein the outer stator inner ring of the magnetic bearing is provided with slots corresponding to the teeth of the inner stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120635594.9U CN214499794U (en) | 2021-03-29 | 2021-03-29 | Low-loss radial magnetic suspension bearing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120635594.9U CN214499794U (en) | 2021-03-29 | 2021-03-29 | Low-loss radial magnetic suspension bearing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214499794U true CN214499794U (en) | 2021-10-26 |
Family
ID=78201017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120635594.9U Active CN214499794U (en) | 2021-03-29 | 2021-03-29 | Low-loss radial magnetic suspension bearing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214499794U (en) |
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2021
- 2021-03-29 CN CN202120635594.9U patent/CN214499794U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Low Loss Radial Magnetic Levitation Bearing System Effective date of registration: 20230809 Granted publication date: 20211026 Pledgee: Jinan Zhangqiu District Sub branch of Postal Savings Bank of China Co.,Ltd. Pledgor: Shandong tomorrow Machinery Group Co.,Ltd. Registration number: Y2023980051515 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |