CN202883726U - Permanent magnet bias magnet axial mixed magnetic bearing - Google Patents
Permanent magnet bias magnet axial mixed magnetic bearing Download PDFInfo
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- CN202883726U CN202883726U CN 201220451864 CN201220451864U CN202883726U CN 202883726 U CN202883726 U CN 202883726U CN 201220451864 CN201220451864 CN 201220451864 CN 201220451864 U CN201220451864 U CN 201220451864U CN 202883726 U CN202883726 U CN 202883726U
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Abstract
The utility model discloses a permanent magnet bias magnet axial mixed magnetic bearing. The permanent magnet bias magnet axial mixed magnetic bearing is provided with two stator discs which have the same structure and are axially symmetrically arranged relative to suction discs; a disc surface of each stator disc is provided with an external circular coil groove, two circular magnetic insulation ring grooves, a circular permanent magnet groove and an internal circular coil groove in the radial direction from outside to inside; control coils are arranged in the internal circular coil grooves and the external circular coil grooves; an magnetic insulation ring is embedded and inserted in each circular magnetic insulation ring groove; a circular permanent magnet is pressed in each circular permanent magnet groove, and is magnetized in the radial direction; static bias magnet magnetic field is generated by permanent magnet materials; the volume of the magnetic bearing is reduced; the power consumption of a power amplifier is lowered; the bearing capability of the magnetic bearing is improved; the circular magnets are embedded in the middles of the static discs, the rigidity of suction discs is ensured; and the provided bias magnet magnetic fields are symmetrical up and down, and are equal left and right.
Description
Technical field
The utility model relates to a kind of on-mechanical contact magnetic bearing, refer in particular to a kind of permanent magnet bias-magnetic axial mixed magnetic bearing, be applicable to the axial contactless suspension bearing of rotary component in the machinery such as five degree of freedom magnetic bearing system, bearing-free motor axially locating and High-Speed Flywheel Energy Storage System.
Background technique
Since nineteen seventies, the magnetic bearing technology developed rapidly, because the bias field of hybrid magnetic suspension bearing is produced by permanent-magnet material, electromagnetic coil only produces controlling magnetic field, have advantages of low in energy consumption, volume is little, thereby become study hotspot.It is ripe that the technology of radial hybrid magnetic bearing has been tending towards, and the technology of single-degree-of-freedom axial mixed magnetic bearing is also rare, particularly the design of the aspect such as mechanical structure and magnetic structure design is also not too reasonable, and ubiquity axial mixed magnetic bearing volume is large, the shortcoming of poor stability.In order to reduce magnetic bearing axial and radial dimension from structure, reduce volume, the reduction power loss of magnetic bearing, the rigidity of raising suction dish, the stability of raising magnetic bearing, the application of expansion magnetic bearing, just new mechanical structure and the magnetic structure of necessary employing.
China Patent Publication No. CN101038011, name are called " three degrees of freedom AC mixing magnetic bearing ", radially two-freedom and axial single-degree-of-freedom combine, there is level of integration high, the advantages such as volume is little, but its defect is: have coupling between radial force and axial force, increased the difficulty of control system.It is a kind of axial single-degree-of-freedom magnetic suspension bearing that China Patent Publication No. CN101025198, name are called " a kind of permanent magnet bias-magnetic axial mixed magnetic bearing ", only adopt the garden annular permanent magnet of a radial magnetizing, rotor quality is little, simple in structure, axially control winding and be positioned at the radial stator both sides, increase the axial length of magnetic bearing, reduced the critical speed of rotation of suspended rotor.
Summary of the invention
The purpose of this utility model is for overcoming the deficiencies in the prior art, a kind of have new mechanical structure and the permanent magnet bias-magnetic axial mixed magnetic bearing of magnetic structure are provided, compactness rational in infrastructure, volume are little, lightweight, low in energy consumption, good stability and efficiency high, manufacturing simultaneously is simple, be convenient to assembling, be easy to realize.
The technical solution adopted in the utility model is: comprise rotating shaft and be sleeved on suction dish and the stator disc in rotating shaft, it is characterized in that: the identical and stator disc that axially be arranged symmetrically with respect to the suction dish of two structures is arranged, and two stator discs equate with the external diameter of suction dish,
?on the card of each stator disc all radially ecto-entad there is a cylindrical circular coil groove, two ring magnetism resistent ring grooves, a round ring magnet groove, an interior making toroidal coil groove, described two ring magnetism resistent ring grooves lay respectively at the radially both sides of described round ring magnet groove; Groove notch on the card of each stator disc is all towards the suction dish; Be equipped with control coil in each inside and outside making toroidal coil groove, in each ring magnetism resistent ring groove, all intercalation has magnetism resistent ring, all has been pressed into round ring magnet in each round ring magnet groove, the equal radial magnetizing of each round ring magnet; Two control coil parallel connections on same stator disc; Corresponding control coil on two stator discs, magnetism resistent ring, permanent magnet are symmetrical in the axial direction with respect to the suction dish separately; Vertically, all there is axial main air gap between each stator disc outer radius and suction dish, all there is axial secondary air gap between each stator disc inner radius and suction dish; All there is axial air-gap between each round ring magnet and suction dish, radially go up, between each stator disc inner radius and rotating shaft, all there is radial air gap.
The utility model beneficial effect compared with prior art is:
1, produce static bias field with traditional magnetic bearing by electromagnet and compare, static bias field of the present utility model is produced by permanent-magnet material, can dwindle the magnetic bearing volume, reduces power cost of power amplifier, alleviates the weight of magnetic bearing, improves the magnetic bearing bearing capacity.
2, the utility model does not take radial and axial length, has improved the critical speed of rotation of suspended rotor, has increased the application area of hybrid magnetic suspension bearing.
3, with traditional magnetic bearing, permanent magnet is contained on rotor, difficult assembling and rotor rigidity are low to be compared, the utility model is embedded in round ring magnet in the middle of stator disc, guaranteed the rigidity of suction dish, the upper and lower symmetry of the bias field provided, left and right equate, when the suction dish mediates, under the effect of bias field, can realize stable suspension.
4, can only solely at main air gap, apply ACTIVE CONTROL with traditional magnetic bearing compares, the controlling magnetic field that the two cover electromagnetic control coils that the utility model adopts produce is symmetrical up and down, the major-minor air gap can apply ACTIVE CONTROL, when rotor displacement, is not easy to produce eccentric magnetic pull.
5, the utility model has added magnetism resistent ring in the round ring magnet both sides, does not all have coupling on structure and magnetic circuit, has simplified control system, has improved the stability of hybrid magnetic bearing.
The accompanying drawing explanation
The axial, cross-sectional view that Fig. 1 is the utility model permanent magnet bias-magnetic axial mixed magnetic bearing structure and flux circuit schematic diagram.
Fig. 2 is that the radial cross section that in Fig. 1, the first stator disc 1 does not contain coil 41,42 structures dwindles schematic diagram.
Fig. 3 is that the radial cross section that in Fig. 1, the second stator disc 2 does not contain coil 43,44 structures dwindles schematic diagram.
Fig. 4 is that the radial cross section that in Fig. 1, the second stator disc 2 contains coil 43,44 structures dwindles schematic diagram.
In figure: 1. the first stator disc; 2. the second stator disc; 3. rotating shaft, 41,42,43,44. first, second, third, fourth control coils; 45,47. first, second cylindrical circular coil grooves; 46,48. first, second, interior making toroidal coil groove; 51,52. first, second round ring magnets; 53,54. first, second round ring magnet grooves; 61,62,63,64. first, second, third, fourth magnetism resistent rings; 65,66,67,68. first, second, third, fourth ring magnetism resistent ring grooves; 71, the static magnetic bias flux circuit that 72. first, second permanent magnets produce; 81, the ACTIVE CONTROL flux circuit that 82,83,84. first, second, third, fourth control coils produce; 9. axial main air gap; 10. axial secondary air gap; 11. radial air gap; 12. suction dish; 13. axial air-gap..
Embodiment
As shown in Figure 1, the utility model comprises the first stator disc 1, the second stator disc 2, suction dish 12, rotating shaft 3, two round ring magnets, four magnetism resistent rings, quadruplet control coil, two cylindrical circular coil grooves, two interior making toroidal coil grooves, two round ring magnet grooves and four ring magnetism resistent ring grooves.
Wherein, the first stator disc 1, the second stator disc 2 and suction dish 12 are all with rotating shaft 3 concentrics and be sleeved in rotating shaft 3, and the first stator disc 1 is identical with the structure of the second stator disc 2, lays respectively at the axial both sides of suction dish 12 and is arranged symmetrically with respect to suction dish 12.The first stator disc 1, the second stator disc 2 all equate with suction dish 12 threes' external diameter.
Referring to Fig. 1 and Fig. 2, on the card of the first stator disc 1, radially ecto-entad in turn has the first cylindrical circular coil groove 45, the first ring magnetism resistent ring groove 65, the first round ring magnet groove 53, the interior making toroidal coil groove 46 of the second ring magnetism resistent ring groove 66, first, wherein be arranged in the first round ring magnet groove 53 radially first, second ring magnetism resistent ring groove 65,66 of both sides with the spacing between the first round ring magnet groove 53, equate.In turn, place the first control coil 41 in the first cylindrical circular coil groove 45, at interior intercalation the first magnetism resistent ring 61 of the first ring magnetism resistent ring groove 65, be pressed into the first round ring magnet 51 in the first round ring magnet groove 53, at interior intercalation the second magnetism resistent ring 62 of the second ring magnetism resistent ring groove 66, at the first interior making toroidal coil groove 46, place the second control coil 42.The first control coil 41 and the second control coil 42 parallel connections, control magnetic flux in order to produce.
Referring to Fig. 1, Fig. 3 and Fig. 4, on the card of the second stator disc 2, radially ecto-entad in turn has the second cylindrical circular coil groove 47, the 3rd ring magnetism resistent ring groove 67, the second round ring magnet groove 54, the interior making toroidal coil groove 48 of the 4th ring magnetism resistent ring groove 68, second, wherein be arranged in the second round ring magnet groove 54 radially the 3rd, the 4th ring magnetism resistent ring groove 67,68 of both sides with the spacing between the second round ring magnet groove 54, equate.In turn, place the 3rd control coil 43 in the second cylindrical circular coil groove 47, at the 3rd ring magnetism resistent ring groove 67 interior intercalation the 3rd magnetism resistent rings 63, be pressed into the second round ring magnet 52 in the second round ring magnet groove 54, at the second cylindrical annular magnetism resistent ring groove 67 interior intercalation the 3rd magnetism resistent rings 63, at the interior placement of the second interior making toroidal coil groove 48 the 4th control coil 44.The 3rd control coil 43 and the 4th control coil 44 parallel connections, control magnetic flux in order to produce, separate with the first control coil 41 and the second control coil 42.
The notch of each groove had on the card of the first stator disc 1 and the second stator disc 2 is all towards suction dish 12, and the corresponding control coil be disposed radially on the control coil be disposed radially on the first stator disc 1, magnetism resistent ring, permanent magnet and the second stator disc 2, magnetism resistent ring, permanent magnet are all with respect to suction dish 12 symmetries.
As Fig. 1, vertically, between first, second stator disc 1,2 outer radius and suction dish 12, all there is axial main air gap 9, all there is axial secondary air gap 10 between inner radius and suction dish 12; All there is the axial air gap 13 of axial air-gap 13, two between first, second round ring magnet 51,52 and suction dish 12 and be 0.45 mm; Radially go up, first, second stator disc 1,2 inner radius all and have radial air gap 11 between rotating shaft 3.
The first stator disc 1 and the second stator disc 2 all adopt silicon steel plate stacking to form, and suction dish 12 is formed by circular silicon steel plate stacking, and first, second round ring magnet 51,52 all adopts the rare earth material iron boron of admiring to make.
At the radial magnetizing of first, second round ring magnet 51,52, the outer shroud of first, second round ring magnet 51,52 is the N utmost point, and interior ring is the S utmost point.
As in Fig. 1 with the static magnetic bias flux circuit as shown in the side circuit 71,72 of arrow, static magnetic bias magnetic flux is the N utmost point from round ring magnet, through stator disc, axial air-gap 13, suction dish 12, enter stator disc through axial air-gap 13 again, get back to the S utmost point of round ring magnet, form a complete permanent magnetic flux loop.Side circuit 71 is the complete static magnetic bias flux circuits that consist of the first round ring magnet 51, axial air-gap 13 and suction dish 12.Side circuit 72 is the static magnetic bias flux circuits by the second round ring magnet 52, axial air-gap 13, suction dish 12 completes.
As in Fig. 1 with as shown in the dotted line loop 81,82,83,84 of arrow, dotted line loop 81 is the control magnetic flux loops by the first stator disc 1, axial main air gap 9 and suction dish 12 completes.Dotted line loop 82 is the control magnetic flux loops by the first stator disc 1, axial secondary air gap 10 and suction dish 12 completes.Dotted line loop 83 is the control magnetic flux loops by the second stator disc 2, axial main air gap 9 and suction dish 12 completes.Dotted line loop 84 is the control magnetic flux loops by the second stator disc 2, axial secondary air gap 10 and suction dish 12 completes.Take dotted line loop 83 as the example explanation, after the 3rd axial control coil 43 passes into direct current, judge magnetic direction by screw law, control magnetic flux and flow to the S utmost point from the N utmost point, form loop between the second stator disc 2, axial main air gap 9, suction dish 12, forming axial control magnetic flux loop is dotted line loop 83, and in like manner, the control magnetic flux loop in dotted line loop 81,82,84 is analyzed the same.
When suction dish 12, during in equilibrium position, with the axial air-gap 13 between first, second round ring magnet 51,52, equate, and two axial air gaps 13 are 0.45 mm.When axial stable suspersion, the neutral position in suspending under the transverse magnetic field suction that rotor produces at permanent magnet.When being subject to external disturbance or other interference, when suction dish 12 has broken away from equilibrium position, by controlling the size and Orientation of electric current in the first, second, third, the 3rd control coil 41,42,43,44, can control the magnetic flux size and Orientation corresponding the variation occurs, make two Resultant magnetic fields in axial air-gap 13 that corresponding the variation occur, make the suffered axial suspension power of suction dish 12 of axial mixed magnetic bearing that corresponding the variation occur, thereby guarantee suction dish 12 neutral position in longitudinal balance all the time.
Claims (5)
1. a permanent magnet bias-magnetic axial mixed magnetic bearing, comprise rotating shaft and be sleeved on suction dish and the stator disc in rotating shaft, it is characterized in that: the identical and stator disc that axially be arranged symmetrically with respect to the suction dish of two structures is arranged, and two stator discs equate with the external diameter of suction dish,
?on the card of each stator disc all radially ecto-entad there is a cylindrical circular coil groove, two ring magnetism resistent ring grooves, a round ring magnet groove, an interior making toroidal coil groove, described two ring magnetism resistent ring grooves lay respectively at the radially both sides of described round ring magnet groove;
Groove notch on the card of each stator disc is all towards the suction dish; Be equipped with control coil in each inside and outside making toroidal coil groove, in each ring magnetism resistent ring groove, all intercalation has magnetism resistent ring, all has been pressed into round ring magnet in each round ring magnet groove, the equal radial magnetizing of each round ring magnet; Two control coil parallel connections on same stator disc; Corresponding control coil on two stator discs, magnetism resistent ring, permanent magnet are symmetrical in the axial direction with respect to the suction dish separately; Vertically, all there is axial main air gap between each stator disc outer radius and suction dish, all there is axial secondary air gap between each stator disc inner radius and suction dish; All there is axial air-gap between each round ring magnet and suction dish, radially go up, between each stator disc inner radius and rotating shaft, all there is radial air gap.
2. a kind of permanent magnet bias-magnetic axial mixed magnetic bearing according to claim 1, it is characterized in that: two ring magnetism resistent ring grooves of the radially both sides of described round ring magnet groove equate with the spacing between described round ring magnet groove.
3. a kind of permanent magnet bias-magnetic axial mixed magnetic bearing according to claim 1, it is characterized in that: described axial air-gap is 0.45 mm.
4. a kind of permanent magnet bias-magnetic axial mixed magnetic bearing according to claim 1, it is characterized in that: described stator disc is formed by silicon steel plate stacking, and described suction dish is formed by circular silicon steel plate stacking, and described round ring magnet is made by the rare earth material iron boron of admiring.
5. a kind of permanent magnet bias-magnetic axial mixed magnetic bearing according to claim 1, it is characterized in that: the outer shroud of described round ring magnet is the N utmost point, interior ring is the S utmost point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220451864 CN202883726U (en) | 2012-09-06 | 2012-09-06 | Permanent magnet bias magnet axial mixed magnetic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220451864 CN202883726U (en) | 2012-09-06 | 2012-09-06 | Permanent magnet bias magnet axial mixed magnetic bearing |
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| Publication Number | Publication Date |
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| CN202883726U true CN202883726U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220451864 Withdrawn - After Issue CN202883726U (en) | 2012-09-06 | 2012-09-06 | Permanent magnet bias magnet axial mixed magnetic bearing |
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| CN (1) | CN202883726U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900761A (en) * | 2012-09-06 | 2013-01-30 | 江苏大学 | Permanent magnet biased axial hybrid magnetic bearing |
| CN103925293A (en) * | 2014-04-02 | 2014-07-16 | 江苏大学 | Radial hybrid magnetic bearing of slice rotor |
| WO2015035871A1 (en) * | 2013-09-13 | 2015-03-19 | 珠海格力节能环保制冷技术研究中心有限公司 | Magnetic suspension bearing and centrifugal compressor |
| CN109236858A (en) * | 2018-11-26 | 2019-01-18 | 谢晓旋 | A kind of Three Degree Of Freedom axial magnetic bearing |
| WO2021135276A1 (en) * | 2019-12-31 | 2021-07-08 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, compressor, and air conditioner |
-
2012
- 2012-09-06 CN CN 201220451864 patent/CN202883726U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900761A (en) * | 2012-09-06 | 2013-01-30 | 江苏大学 | Permanent magnet biased axial hybrid magnetic bearing |
| CN102900761B (en) * | 2012-09-06 | 2014-12-24 | 江苏大学 | Permanent magnet biased axial hybrid magnetic bearing |
| WO2015035871A1 (en) * | 2013-09-13 | 2015-03-19 | 珠海格力节能环保制冷技术研究中心有限公司 | Magnetic suspension bearing and centrifugal compressor |
| US10190628B2 (en) | 2013-09-13 | 2019-01-29 | Green Refrigeration Equipment Engineering Research Center Of Zhuhai Gree Co., Ltd. | Magnetic bearing and centrifugal compressor |
| CN103925293A (en) * | 2014-04-02 | 2014-07-16 | 江苏大学 | Radial hybrid magnetic bearing of slice rotor |
| CN103925293B (en) * | 2014-04-02 | 2016-05-25 | 江苏大学 | A kind of thin slice rotor radial hybrid magnetic bearing |
| CN109236858A (en) * | 2018-11-26 | 2019-01-18 | 谢晓旋 | A kind of Three Degree Of Freedom axial magnetic bearing |
| WO2021135276A1 (en) * | 2019-12-31 | 2021-07-08 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, compressor, and air conditioner |
| US11905994B2 (en) | 2019-12-31 | 2024-02-20 | Gree Electric Appliances, Inc. Of Zhuhai | Magnetic bearing, compressor and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130417 Effective date of abandoning: 20141224 |
|
| RGAV | Abandon patent right to avoid regrant |