CN105275991B - A kind of novel self-stabilization passive magnetic bearing of grid generator - Google Patents
A kind of novel self-stabilization passive magnetic bearing of grid generator Download PDFInfo
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- CN105275991B CN105275991B CN201510835422.5A CN201510835422A CN105275991B CN 105275991 B CN105275991 B CN 105275991B CN 201510835422 A CN201510835422 A CN 201510835422A CN 105275991 B CN105275991 B CN 105275991B
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- 238000011105 stabilization Methods 0.000 title claims abstract description 16
- 230000001154 acute effect Effects 0.000 claims description 19
- 230000005389 magnetism Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 230000005012 migration Effects 0.000 claims 1
- 238000013508 migration Methods 0.000 claims 1
- 239000000725 suspension Substances 0.000 abstract description 19
- 238000000418 atomic force spectrum Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003752 improving hair Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The present invention relates to a kind of non-contact magnetically suspension bearing, the novel self-stabilization passive magnetic bearing of especially a kind of power grid can be used as the contactless support of rotary part in the mechanical equipments such as small grids generator.The passive magnetic bearing of the present invention is by two groups of passive magnetic bearings to forming, each group of passive magnetic bearing two magnet rings to being made of, they have collectively constituted stationary part and rotor portion, magnetic air gap is formed between stationary part and rotor portion, the cross sectional shape of each magnet ring has special requirement.Present invention saves sensing system, control coil and the required power amplifiers of control coil, particularly, present invention employs the structure type of passive magnetic bearing pair, it can be achieved that the five-freedom degree full-suspension of passive magnetic bearing.
Description
Technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, especially a kind of grid generator passive magnetic of novel self-stabilization
Bearing arrangement, it can be achieved that the rotary parts such as power grid small generator, motor contactless support.
Background technology
Electric power network technique is intricate, and in grid power system, generator is its important one of link, in order to improve hair
Electric efficiency promotes generator techniques level, realizes that the target of national energy-saving environmental protection, the development of magnetic suspension motor are fast in recent years
Exhibition is hailed, traditional magnetic suspension motor system realizes the suspension of five degree of freedom, must use active magnetic bearings and passive magnetic axis
The mode of combination is held, it is known that magnetic suspension bearing is divided into active and passive type, active magnetic suspension bearing is in biasing magnetic
Magnetic suspension bearing made of magnetic field caused by superposing control coil on the basis of, passive type magnetic suspension bearing are only permanent magnetism
Magnetic suspension bearing made of magnetic field, existing passive magnetic bearing are divided into attractive and repulsion type passive magnetic bearing, are all profit mostly
The active force needed when generating stable with the interaction of stator permanent magnet and rotor permanent magnet in air gap, according to En Xiuding
Reason, single passive magnetic bearing cannot achieve the full suspension of five degree of freedom, but there is no to carrying out passive magnetic bearing for the theorem
Combination configuration illustrates, and current single passive magnetic bearing cannot achieve the full suspension of five degree of freedom really.
Invention content
The technology of the present invention solves the problems, such as：Overcome the deficiencies of the prior art and provide a kind of grid generator with it is novel from
Stablize passive magnetic bearing, this bearing by passive magnetic bearing combination configuration and cross sectional shape variation, may be implemented be
The full suspension of system.
Technical solution of the invention is：The novel self-stabilization passive magnetic bearing of a kind of grid generator, by two groups of quilts
Dynamic magnetic bearing is to composition, and each group of passive magnetic bearing is to being divided into two magnet rings, and one of magnet ring is as stator department
Point, another magnet ring is glued as rotor portion, the rotor portion of two groups of passive magnetic bearings pair by non-magnet material
Fixation is connect, the stationary part of two groups of passive magnetic bearings pair is installed on electric generator casing.The permanent magnetism of each group of passive magnetic bearing pair
Body ring is identical, and each magnet ring radially magnetizes, and section is parallelogram, and the acute angle part of parallelogram
Divide and has to be between 40 degree~60 degree.
The installation of two groups of passive magnetic bearings pair can also be to be symmetrically installed about y-axis.
The acute angle of the section parallelogram of one group of the permanent magnet pair is 42 degree, another group of section parallelogram
Acute angle be 53 degree.
The magnet ring is sintered samarium cobalt permanent magnet or Nd-Fe-B permanent magnet.
The principle of the present invention is：According to two magnet rings in same magnetizing direction, but generated under different cross section shape
The difference of the size and Orientation of radial load and axial force, by emulating and testing the group for seeking to generate that radial load and axial force are stablized
It closes, by the combination of different permanent magnets pair, the full suspension of five degree of freedom may be implemented.
The advantages of the present invention over the prior art are that：Compared with existing active magnetic suspension bearing, sensor is saved
System, control coil and the required controller of control coil reduce volume, alleviate weight, eliminate loss, improve
The reliability of system；Compared with existing passive type magnetic suspension bearing, present invention employs the permanent magnets pair of different cross section shape
Combination, the five-freedom degree full-suspension of magnetic suspension system may be implemented.
Description of the drawings
Fig. 1 is the basic block diagram of the single group passive magnetic bearing pair of the present invention.
Fig. 2 is the single group passive magnetic bearing of the present invention to the stress curve when section parallelogram acute angle is 10 degree,
Wherein Fig. 2 a are axial force curve, and Fig. 2 b are radial force curve.
Fig. 3 is the single group passive magnetic bearing of the present invention to the stress curve when section parallelogram acute angle is 50 degree,
Wherein Fig. 3 a are axial force curve, and Fig. 3 b are radial force curve.
Fig. 4 is the single group passive magnetic bearing of the present invention to the stress curve when section parallelogram acute angle is 75 degree,
Wherein Fig. 4 a are axial force curve, and Fig. 4 b are radial force curve.
Fig. 5 is structural representation of the two groups of passive magnetic bearings of the present invention to (section parallelogram acute angle is identical)
Figure.
Fig. 6 is two groups of passive magnetic bearings of the present invention to the structural representation under Optimum cross section parallelogram acute angle
Figure.
Fig. 7 is structure of the two groups of passive magnetic bearings to (section parallelogram acute angle is symmetrical along y-axis) of the present invention
Schematic diagram.
Specific implementation mode
Fig. 1 is single group passive magnetic bearing pair of the present invention, and α is section parallelogram acute angle, D in figureiFor permanent magnetism
The internal diameter of body ring is 280mm, D in the present embodimentoIt is 390mm in the present embodiment, L is magnet ring for the outer diameter of magnet ring
Axial length, be 120mm in the present embodiment, the thickness of each magnet ring is 110mm in the present embodiment, and δ is gas in figure
Gap length is in the present embodiment 1.5mm, when one of magnet ring moves axially, generated displacement we
Referred to as offset, it is negative along z-axis negative sense or y-axis negative movement just to be along z-axis forward direction or y-axis positive movement.All magnet rings
Radially magnetize.
When the section parallelogram sharp angle α of magnet ring is 10 degree, the axis that single magnet ring is subject to can be obtained
To force curve and radial force curve, as shown in Fig. 2, can be seen that the increase with axial offset from Fig. 2 a, axial force is exhausted
Value is reduced, direction is negative, that is to say, that when a magnet ring is moved from equilbrium position toward z-axis negative sense, suffered axial force
Direction be negative, and offset is bigger, and axial force is bigger；Similarly, when a magnet ring is moved from equilbrium position toward z-axis forward direction
When, the direction of suffered axial force is still negative, and offset is bigger, and axial force is smaller, therefore be in the axial direction semisteady-state (i.e.
Only deviate and stablize toward positive direction), it can be seen that from Fig. 2 b when radial offset is along positive increase, the institute of a magnet ring
It is negative value by radial load, and increasing, when radial offset increases along negative sense, a magnet ring force in radial is just
Value, and it is increasing, therefore such case, this group of magnetic bearing are stablized for radial direction.
When the section parallelogram sharp angle α of magnet ring is 50 degree, the axis that single magnet ring is subject to can be obtained
To force curve and radial force curve, as shown in figure 3, can be seen that the increase with axial offset from Fig. 3 a, axial force is
Just and reducing, that is to say, that when a magnet ring is moved along z-axis negative sense, suffered by axial force be forward direction, and negative sense
Displacement distance more larger axial force forward direction is bigger, similarly, when a magnet ring is moved along z-axis forward direction, although suffered axial force
Also it is just that but with the increase of axial offset, axial force is reducing, if this explanation is using described in two groups shown in fig. 5
Passive magnetic bearing clock synchronization, if one group of passive magnetic bearing gap of one end becomes larger, i.e., there is forward bias for this end in rotor
Shifting amount is equivalent to then as axial force suffered by the increase of offset this end rotor reduces, and for the other end and negative sense occurs
Offset, with the reduction of offset, axial force suffered by the end rotor is opposite with offset direction and increases, therefore axis may be implemented
Upward self-stabilization；It can be seen that from Fig. 3 b when radial offset is along positive increase, a magnet ring force in radial is
Negative value, and it is increasing, when radial offset increases along negative sense, the force in radial of a magnet ring is positive value, and more
Carry out bigger, therefore such case, this group of magnetic bearing is that radial direction is stablized.It can thus be seen that parallel using permanent-magnetic clamp section
When quadrangle acute angle is 50 degree, the radial direction of one group of passive magnetic bearing is self-stabilization, when using identical two groups of passive magnetic
For bearing to rear, axial direction is also self-stabilization.
When the section parallelogram sharp angle α of magnet ring is 75 degree, the axis that single magnet ring is subject to can be obtained
To force curve and radial force curve, as shown in figure 4, can be seen that the increase with axial offset from Fig. 4 a, axial force is exhausted
Value is reduced, direction is just, that is to say, that when a magnet ring is moved from equilbrium position toward z-axis negative sense, suffered axial force
Direction be just that and offset is bigger, and axial force is bigger；Similarly, when a magnet ring is moved from equilbrium position toward z-axis forward direction
When, the direction of suffered axial force is still that just, and offset is bigger, and axial force is smaller, therefore is regarded as semi-stability in the axial direction
State (only deviates toward negative direction and stablizes), it is seen from fig. 4b that when radial offset is along positive increase, a permanent magnet
The force in radial of ring is positive value, and increasing, radial suffered by a magnet ring when radial offset increases along negative sense
Power is negative value, and increasing, therefore such case, this group of magnetic bearing is unstable in radial direction.
Self-stabilization passive magnetic bearing of the present invention by two groups of above-mentioned passive magnetic bearings to forming, each group of passive magnetic
Bearing is to being divided into two magnet rings, and one of magnet ring is as stationary part, another magnet ring is as rotor portions
Point, the rotor portion of two groups of passive magnetic bearings pair passes through non-magnet material (such as aluminium alloy, 1Cr18Ni9Ti and titanium alloy material
Material) it is adhesively fixed, the stationary part of two groups of passive magnetic bearings pair is installed on electric generator casing.Each group of passive magnetic bearing
To magnet ring it is identical, each magnet ring radially magnetizes, section be parallelogram.According to a large amount of emulation
And experiment, it can be deduced that between the acute angle of magnet ring section of the present invention parallelogram has to be between 40 degree~60 degree,
The five degree of freedom self-stabilization of whole system may be implemented.Particularly, the section parallelogram of one group of the permanent magnet pair
Acute angle is 42 degree, and the acute angle of another group of section parallelogram is 53 degree, as shown in fig. 6, it is optimal to may be implemented degree of stability,
That is radial rigidity and axial rigidity can reach maximum value.
According to the symmetry of magnet ring shape it is found that figure may be used in two groups of magnet ring cross sectional shapes of the present invention
Along the symmetrical cross sectional shape of y-axis shown in 7.The magnet ring is sintered samarium cobalt permanent magnet or Nd-Fe-B permanent magnet.
The content that description in the present invention is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (3)
1. a kind of grid generator self-stabilization passive magnetic bearing, it is characterised in that：It is each by two groups of passive magnetic bearings to forming
Group passive magnetic bearing is made to being divided into two magnet rings, one of magnet ring as stationary part, another magnet ring
Rotor portion for rotor portion, two groups of passive magnetic bearings pair is adhesively fixed by non-magnet material, two groups of passive magnetic axises
The stationary part honoured is installed on electric generator casing；The magnet ring of each group of passive magnetic bearing pair is identical, Mei Geyong
Magnet ring radially magnetizes, and section is parallelogram, and the acute angle portion of parallelogram has to be between 40 degree~60
Between degree, the installation of described two groups of passive magnetic bearings pair is symmetrical about y-axis；When the section parallelogram acute angle of magnet ring
When α is 50 degree, with the increase of axial offset, axial force is just and to reduce, that is to say, that when a magnet ring is along z
When axis negative sense moves, suffered by axial force be forward direction, and negative sense displacement distance more larger axial force forward direction is bigger, similarly, when one
It is axial with the increase of axial offset although suffered axial force is also just when a magnet ring is moved along z-axis forward direction
Power is reducing, if this illustrates using passive magnetic bearing clock synchronization described in two groups, if one group of passive magnetic bearing gap of one end becomes
Greatly, i.e., there is forward migration amount for this end in rotor, then as axial force suffered by the increase of offset this end rotor reduces,
And for the other end, it is equivalent to and negative offset occurs, with the reduction of offset, axial force suffered by the end rotor and offset
It measures direction on the contrary and increases, therefore the self-stabilization in axial direction may be implemented；When radial offset is along positive increase, a permanent magnetism
Body ring force in radial is negative value, and increasing, when radial offset increases along negative sense, the suffered diameter of a magnet ring
Xiang Liwei positive values, and it is increasing, therefore such case, this group of magnetic bearing are stablized for radial direction, therefore, are cut using permanent-magnetic clamp
When face parallelogram acute angle is 50 degree, the radial direction of one group of passive magnetic bearing is self-stabilization, when using identical two groups
For passive magnetic bearing to rear, axial direction is also self-stabilization.
2. self-stabilization passive magnetic bearing according to claim 1, it is characterised in that：The section of one group of the permanent magnet pair
The acute angle of parallelogram is 42 degree, and the acute angle of another group of section parallelogram is 53 degree.
3. self-stabilization passive magnetic bearing according to claim 1, it is characterised in that：The magnet ring is sintered samarium cobalt
Permanent magnet or Nd-Fe-B permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510835422.5A CN105275991B (en) | 2015-11-27 | 2015-11-27 | A kind of novel self-stabilization passive magnetic bearing of grid generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510835422.5A CN105275991B (en) | 2015-11-27 | 2015-11-27 | A kind of novel self-stabilization passive magnetic bearing of grid generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105275991A CN105275991A (en) | 2016-01-27 |
| CN105275991B true CN105275991B (en) | 2018-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510835422.5A Active CN105275991B (en) | 2015-11-27 | 2015-11-27 | A kind of novel self-stabilization passive magnetic bearing of grid generator |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114069949B (en) * | 2022-01-18 | 2022-05-17 | 华驰动能(北京)科技有限公司 | Energy storage flywheel and energy storage equipment with same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2120215U (en) * | 1992-03-26 | 1992-10-28 | 权世华 | Magnetic force suspension bearing |
| CN2235042Y (en) * | 1995-03-13 | 1996-09-11 | 赵家文 | Permanent magnet magnetic bearing |
| CN101625013A (en) * | 2008-07-13 | 2010-01-13 | 卓向东 | Magnetic suspension bearing with conical suspended ring |
| CN101709746A (en) * | 2009-12-22 | 2010-05-19 | 上海大学 | Five-freedom-degree permanent-magnet suspension bearing rotor system |
| CN102042323A (en) * | 2009-10-19 | 2011-05-04 | 卓向东 | Linear conical magnetic suspension bearing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004150624A (en) * | 2002-09-03 | 2004-05-27 | Seiko Epson Corp | Magnetic bearing device |
-
2015
- 2015-11-27 CN CN201510835422.5A patent/CN105275991B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2120215U (en) * | 1992-03-26 | 1992-10-28 | 权世华 | Magnetic force suspension bearing |
| CN2235042Y (en) * | 1995-03-13 | 1996-09-11 | 赵家文 | Permanent magnet magnetic bearing |
| CN101625013A (en) * | 2008-07-13 | 2010-01-13 | 卓向东 | Magnetic suspension bearing with conical suspended ring |
| CN102042323A (en) * | 2009-10-19 | 2011-05-04 | 卓向东 | Linear conical magnetic suspension bearing |
| CN101709746A (en) * | 2009-12-22 | 2010-05-19 | 上海大学 | Five-freedom-degree permanent-magnet suspension bearing rotor system |
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| CN105275991A (en) | 2016-01-27 |
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Effective date of registration: 20180905 Address after: 100070 Beijing Fengtai District South Fourth Ring Road 186 three District 5 Building 3 floors 18 rooms. Applicant after: Magnetic Polytron Technologies Inc Address before: 100191 Beihang University, Haidian District, Xueyuan Road 37, Beihang University Applicant before: Ju Ziyan |
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Addressee: Ju Ziyan Document name: Notification of Passing Examination on Formalities Addressee: Ju Ziyan Document name: Notification that Application Deemed not to be Proposed |
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Effective date of registration: 20200110 Address after: Floor 11, 1107, Building 51, 63 Zhichun Road, Haidian District, Beijing 100080 Patentee after: Beijing Gaofu Power Technology Co., Ltd. Address before: 100070 Beijing Fengtai District South Fourth Ring Road 186 three District 5 Building 3 floors 18 rooms. Patentee before: Magnetic Polytron Technologies Inc |
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