CN104314976B - Two-degree-of-freedom internal rotor permanent magnet biased spherical radial magnetic bearing - Google Patents
Two-degree-of-freedom internal rotor permanent magnet biased spherical radial magnetic bearing Download PDFInfo
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- CN104314976B CN104314976B CN201410648252.5A CN201410648252A CN104314976B CN 104314976 B CN104314976 B CN 104314976B CN 201410648252 A CN201410648252 A CN 201410648252A CN 104314976 B CN104314976 B CN 104314976B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0459—Details of the magnetic circuit
- F16C32/0461—Details of the magnetic circuit of stationary parts of the magnetic circuit
- F16C32/0465—Details of the magnetic circuit of stationary parts of the magnetic circuit with permanent magnets provided in the magnetic circuit of the electromagnets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/048—Active magnetic bearings for rotary movement with active support of two degrees of freedom, e.g. radial magnetic bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a two-degree-of-freedom internal rotor permanent magnet biased spherical radial magnetic bearing which mainly comprises two parts, namely a stator system and a rotor system, wherein the stator system mainly comprises an upper spherical stator core, a lower spherical stator core, excitation coils, a magnetic shielding ring, an upper magnetic conducting ring, a lower magnetic conducting ring, a permanent magnet, a stator sleeve and a stator locking ring; the rotor system mainly comprises a spherical rotor core, a rotor sleeve and a rotor locking ring; the upper spherical stator core forms four stator magnetic poles, the lower spherical stator core forms four stator magnetic poles, and eight stator magnetic poles at the upper and lower ends of the magnetic bearing are formed, and form magnetic poles in positive and negative directions of X and Y axes respectively; the excitation coils are wound on each stator magnetic pole. The magnetic bearing can be used as a non-contact bearing of a magnetically suspended gyroscope rotor, so that control over the radial translation and radial torsion of the rotor is completely decoupled, the interference of control over radial translation to control over radial torsion is eliminated, and the pointing accuracy of a magnetically suspended gyroscope is improved.
Description
Technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, particularly relate to a kind of two-freedom internal rotor permanent-magnetic and bias spherical footpath
To magnetic bearing.
Background technology
Magnetic suspension bearing is divided into pure electromagnetism magnetic bearing and permanent magnet biased hybrid magnetic bearing, and the former utilizes bias current to provide biasing
Magnetic field, its electric current is relatively big, power consumption is big, and the latter utilizes the inclined of the bias current generation in the permanent magnet pure electromagnetism magnetic bearing of replacement
Putting magnetic field, and the bias magnetic field that permanent magnet produces undertakes main bearing capacity, electromagnetic control fields provides the regulation of auxiliary
Power, can be greatly reduced magnetic bearings control electric current, reduces power amplifier loss, thus reduces coil turn, reduces magnetic bearing body
Long-pending, reduce weight.So permanent magnet biased magnetic bearing is at magnetic suspension air blower, magnetic suspension motor, magnetic suspension compressor, magnetic
The high speed sports grounds such as levitation energy-storing flywheel, magnetic suspension bias momentum wheel, magnetic suspension control torque gyroscope close and obtain extensively should
With.
Magnetically suspended gyroscope utilizes the gyro wheel of magnetic suspension bearing supporting high speed rotating, eliminates mechanical friction moment band
The interference come, makes gyrorotor be operated in higher rotary regimes, thus provides the bigger moment of momentum for gyrorotor, makes
It has good gyroscopic inertia, thus improves the pointing accuracy of gyroscope.Turn when there being radially torque to act on gyroscope
The period of the day from 11 p.m. to 1 a.m, gyroscope rotary shaft will deflect, and gyroscopic drift i.e. occurs.Therefore, it is necessary to consider that magnetic bearing suspending power is to top
The impact of spiral shell drift.
Showing through analyzing, the premise improving magnetically suspended gyroscope rotor pointing accuracy is, the axial translation control of gyro wheel
System and radially translation control all not interfere with radially twisting control, i.e. the translation in tri-directions of X, Y and Z must be with radial direction
X and Y-direction twisting are full decoupled, and this just requires, when magnetic bearing produces radial and axial electromagnetic force, to produce gyrorotor
Raw deflection torque.
In prior art, granted patent ZL200510011271.8 proposes a kind of permanent magnet biased internal rotor radial magnetic bearing,
Its magnetic pole strength is the face of cylinder.During magnetic bearing work, the electromagnetic attraction suffered by rotor is perpendicular to magnetic pole surfaces all the time.Work as gyro
When instrument rotor inertia axle and magnetic bearing geometrical axis deflect, the electromagnetic attraction size not phase that 8 magnetic pole strengths of magnetic bearing produce
Deng, and all it is not directed to gyro wheel barycenter, i.e. gyro wheel can be produced the disturbance torque of radially twisting, order about top
Spiral shell instrument rotor shaft deviates initial position and produces gyroscopic drift, reduces gyro pointing accuracy.
Summary of the invention
It is an object of the invention to provide the high two-freedom internal rotor permanent-magnetic of a kind of precision and bias spherical radial direction magnetic bearing.
It is an object of the invention to be achieved through the following technical solutions:
The two-freedom internal rotor permanent-magnetic of the present invention biases spherical radial direction magnetic bearing, mainly by stator system and rotor-support-foundation system two
Part composition, stator system specifically include that sphere stator core, lower peripheral surface stator core, magnetizing coil, every magnetic
Ring, upper magnetic guiding loop, lower magnetic guiding loop, permanent magnet, stator sleeve and stator lock ring；Rotor-support-foundation system specifically includes that sphere turns
Son iron core, rotor sleeve and rotor lock ring；Upper sphere stator core 4 magnetic pole of the stator of composition, lower peripheral surface stator core forms
4 magnetic pole of the stator, 8, the upper and lower two ends of magnetic bearing of composition magnetic pole of the stator, separately constitutes X, the magnetic pole of the positive negative direction of Y-axis altogether,
Each magnetic pole of the stator is wound with magnetizing coil, magnetism-isolating loop between upper sphere stator core and lower peripheral surface stator core, on
Magnetic guiding loop is positioned at sphere stator core radial outside, and lower magnetic guiding loop is positioned at lower peripheral surface stator core radial outside, permanent magnet
Between upper magnetic guiding loop and lower magnetic guiding loop, upper magnetic guiding loop, lower magnetic guiding loop and permanent magnet are positioned at stator sleeve radially inner side,
And be fixedly mounted on stator sleeve by stator lock ring, spheric rotor iron core is positioned at rotor sleeve radial outside, and passes through
Rotor lock ring is fixedly mounted on rotor sleeve, spheric rotor iron core spherical outside surface and upper sphere stator core Internal Spherical Surface and lower ball
Face stator core Internal Spherical Surface leaves certain gap, forms air gap.
As seen from the above technical solution provided by the invention, the two-freedom internal rotor permanent-magnetic that the embodiment of the present invention provides
Bias spherical radial direction magnetic bearing, owing to using radially translation inclined with the two-freedom internal rotor permanent-magnetic of radially twisting uneoupled control
Place shape radial direction magnetic bearing, as the contactless supporting of magnetically suspended gyroscope rotor, can make radial direction translation and the radial direction of rotor
Twisting controls full decoupled, eliminates radially translation and controls, to the interference that radially twisting controls, to improve the finger of magnetically suspended gyroscope
To precision.
Accompanying drawing explanation
Fig. 1 biases the axial cross section structure of spherical radial direction magnetic bearing for the two-freedom internal rotor permanent-magnetic that the embodiment of the present invention provides
Schematic diagram；
Fig. 2 biases the axial end structure of spherical radial direction magnetic bearing for the two-freedom internal rotor permanent-magnetic that the embodiment of the present invention provides
Schematic diagram；
Fig. 3 a is upper sphere stator core and lower peripheral surface stator core sectional view in the embodiment of the present invention；
Fig. 3 b is upper sphere stator core and lower peripheral surface stator core three dimensional structure schematic diagram in the embodiment of the present invention；
Fig. 4 a is spheric rotor iron core sectional view in the embodiment of the present invention；
Fig. 4 b is spheric rotor iron core three dimensional structure schematic diagram in the embodiment of the present invention.
Detailed description of the invention
The embodiment of the present invention will be described in further detail below.
The two-freedom internal rotor permanent-magnetic of the present invention biases spherical radial direction magnetic bearing, and its preferably detailed description of the invention is:
Mainly be made up of stator system and rotor-support-foundation system two parts, stator system specifically include that sphere stator core, under
Sphere stator core, magnetizing coil, magnetism-isolating loop, upper magnetic guiding loop, lower magnetic guiding loop, permanent magnet, stator sleeve and stator lock
Ring；Rotor-support-foundation system specifically includes that spheric rotor iron core, rotor sleeve and rotor lock ring；Upper sphere stator core forms 4
Magnetic pole, lower peripheral surface stator core 4 magnetic poles of composition, upper sphere stator core and lower peripheral surface stator core composition magnetic bearing are upper and lower
8, two ends magnetic pole, separately constitutes X, the magnetic pole of the positive negative direction of Y-axis, and each magnetic pole of the stator is wound with magnetizing coil, magnetism-isolating loop
Between upper sphere stator core and lower peripheral surface stator core, upper magnetic guiding loop is positioned at sphere stator core radial outside,
Lower magnetic guiding loop is positioned at lower peripheral surface stator core radial outside, permanent magnet between upper magnetic guiding loop and lower magnetic guiding loop, upper magnetic conduction
Ring, lower magnetic guiding loop and permanent magnet are positioned at stator sleeve radially inner side, and are fixedly mounted on stator sleeve by stator lock ring
On, spheric rotor iron core is positioned at rotor sleeve radial outside, and is fixedly mounted on rotor sleeve by rotor lock ring, ball
Rotor core spherical outside surface in face leaves certain gap with upper sphere stator core Internal Spherical Surface and lower peripheral surface stator core Internal Spherical Surface,
Form air gap.
Described upper sphere stator core and the magnetic pole of lower peripheral surface stator core all use pole shoe form to reduce under high rotating speed
Eddy-current loss and equivalent drag square.Described upper magnetic guiding loop and lower magnetic guiding loop are 1J85 permeability magnetic material.Described permanent magnet
For shirt cobalt alloy or Nd Fe B alloys material.The axial annulus of described permanent magnet, magnetizes vertically.Described upper sphere is fixed
Spherical radius and the spherical radius of lower peripheral surface stator core that son is unshakable in one's determination are equal, and both centre ofs sphere are completely superposed.
The present invention overcomes the deficiencies in the prior art, uses radially translation and radially twists the internal rotor permanent-magnetic biasing of uneoupled control
Spherical radial direction magnetic bearing, it is to avoid radially translation controls the interference that radially twisting controls.
The principle of the present invention is:
Permanent magnet provides permanent magnet bias magnetic field to magnetic bearing, undertakes the radial force suffered by magnetic bearing, produced by magnetizing coil
The bias magnetic field forwards/reverse that control magnetic field produces with permanent magnet superposes, and keeps magnetic bearing rotor air gap uniform, it is achieved to turn
The contactless suspension bearing of son.As it is shown in figure 1, the permanent magnetic circuit of the present invention is: magnetic flux, from permanent magnet N pole, passes through
Upper magnetic guiding loop, upper sphere stator core, air gap, spheric rotor iron core, air gap, lower peripheral surface stator core, lower magnetic guiding loop
Return to permanent magnet S pole, form the main magnetic circuit of magnetic suspension bearing.As in figure 2 it is shown, produce with upper end Y-axis forward magnetizing coil electric current
As a example by raw magnetic flux, its path is: upper the Y-axis positive magnetic pole of sphere stator core, Y-axis forward air gap are to spheric rotor ferrum
The heart, then to the other three direction air gap, upper sphere stator core formed the other three direction magnetic pole, return to upper sphere
The Y-axis positive magnetic pole that stator core is formed, constitutes closed-loop path.
When magnetic bearing rotor is in equilbrium position, the air gap at 8 magnetic pole strengths is essentially equal, and the electromagnetism at each magnetic pole strength is inhaled
Power is equal in magnitude, suffered by magnetic bearing rotor make a concerted effort and resultant moment be zero.When magnetic bearing rotor inertia axle and its stator geometry
When axle exists a low-angle, at each stator pole face, the electromagnetic attraction suffered by rotor is all the time along magnetic bearing rotor sphere
Radial direction, and all through the centre of sphere of spheric rotor iron core.The centre of sphere unshakable in one's determination with spheric rotor when gyrorotor barycenter is complete
During coincidence, the electromagnetic attraction that 8 magnetic pole strengths go out is 0 to the moment that gyrorotor barycenter produces, and will not order about teetotum rotating shaft
Deflect, i.e. radially translation controls not interfere with radially twisting and controls, it is to avoid radially radially twisting is done by translation
Disturb, eliminate the gyroscopic drift that radial direction magnetic bearing causes.
Present invention advantage compared with prior art is:
The present invention, on the basis of existing inner rotor radial magnetic bearing, changes existing magnetic bearing magnetic pole strength into sphere, makes magnetic axis
Forward son electromagnetic force suffered by each magnetic pole all the time through the centre of sphere that spheric rotor is unshakable in one's determination, overcome because of electromagnetism at each magnetic pole
When power is unequal, and the radial direction twisting disturbance torque produced, eliminate the gyroscopic drift that radial direction magnetic bearing causes, improve
The pointing accuracy of magnetically suspended gyroscope.
Specific embodiment:
As shown in Figure 1, 2, a kind of two-freedom internal rotor permanent-magnetic biases spherical radial direction magnetic bearing, mainly by stator system and
Rotor-support-foundation system two parts form, and stator system specifically includes that sphere stator core 1, lower peripheral surface stator core 2, excitatory
Coil 3, magnetism-isolating loop 4, upper magnetic guiding loop 5, lower magnetic guiding loop 6, permanent magnet 7, stator sleeve 8 and stator lock ring 9；Rotor-support-foundation system
Specifically include that spheric rotor iron core 10, rotor sleeve 11 and rotor lock ring 12；Upper sphere stator core 1 forms 4 magnetic
Pole, lower peripheral surface stator core 2 forms 4 magnetic poles, and upper sphere stator core 1 and lower peripheral surface stator core 2 form on magnetic bearing
8, lower two ends magnetic pole, separately constitutes X, the magnetic pole of the positive negative direction of Y-axis, and each magnetic pole of the stator is wound with magnetizing coil 3, every
Magnet ring 4 is between upper sphere stator core 1 and lower peripheral surface stator core 2, and upper magnetic guiding loop 5 is positioned at sphere stator core 1 footpath
Laterally, lower magnetic guiding loop 6 is positioned at lower peripheral surface stator core 2 radial outside, and permanent magnet 7 is positioned at magnetic guiding loop 5 and lower magnetic guiding loop 6
Between, upper magnetic guiding loop 5, lower magnetic guiding loop 6 and permanent magnet 7 are positioned at stator sleeve 8 radially inner side, and are fixed by stator lock ring 9
Being arranged on stator sleeve 8, spheric rotor iron core 10 is positioned at rotor sleeve 11 radial outside, and is fixed by rotor lock ring 12
It is arranged on rotor sleeve 11, spheric rotor 10 spherical outside surfaces unshakable in one's determination and upper sphere stator core 1 Internal Spherical Surface and lower peripheral surface stator ferrum
The heart 2 Internal Spherical Surface leaves certain gap, forms air gap 13.
Fig. 3 a is upper sphere stator core 1 and lower peripheral surface stator core 2 sectional view in the present invention, and Fig. 3 b is upper ball in the present invention
Face stator core 1 and lower peripheral surface stator core 2 three dimensional structure schematic diagram, its material is the stalloy such as electricity that magnetic property is good
The magnetic material punching presses such as work stalloy 1J22,1J50,1J79,1J85, electrical pure iron fold and form, and four magnetic pole strengths exist
On same sphere, each magnetic pole all uses pole shoe form to reduce the eddy-current loss under high rotating speed and equivalent drag square.
Fig. 4 a is spheric rotor 10 sectional views unshakable in one's determination in the present invention, and Fig. 4 b is spheric rotor 10 three dimensional structures unshakable in one's determination in the present invention
Schematic diagram, its material is stalloy such as electrical steel sheet 1J22,1J50,1J79,1J85, the electrician that magnetic property is good
The magnetic material punching presses such as pure iron fold and form, when gyro wheel is in equilbrium position, and the spherical outside surface of spheric rotor iron core 10
The centre of sphere of the centre of sphere of the centre of sphere and upper sphere stator core 1 Internal Spherical Surface and the Internal Spherical Surface of lower peripheral surface stator core 2 overlaps.
The material of the magnetism-isolating loop 4 used by foregoing invention scheme is the nothings such as duralumin 2A12, the superduralumin 7A09 that heat conductivility is good
Magnetic alloy.Upper magnetic guiding loop 5 and lower magnetic guiding loop 6 are the 1J85 permeability magnetic material that magnetic property is good.The material of permanent magnet 7 is magnetic
Shirt cobalt alloy of good performance or Nd Fe B alloys, permanent magnet 7 is axial annulus, magnetizes vertically.Magnetizing coil 3 is with leading
After the copper wire winding that electricity is good, paint-dipping drying forms.It is good that stator sleeve 8 and rotor sleeve 11 material are heat conductivity ability
1Cr18Ni9Ti weak magnetic rustless steel.Stator lock ring 9 and rotor lock ring 12 material be the good duralumin 2A12 of heat conductivility,
The non-magnetic alloys such as superduralumin 7A09.
The content not being described in detail in description of the invention belongs to prior art known to professional and technical personnel in the field.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope of present disclosure, the change that can readily occur in or replace
Change, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be with claims
Protection domain is as the criterion.
Claims (6)
1. two-freedom internal rotor permanent-magnetic biases a spherical radial direction magnetic bearing, including stator system and rotor-support-foundation system two
Point, it is characterised in that:
Described stator system specifically includes that sphere stator core (1), lower peripheral surface stator core (2), magnetizing coil
(3), magnetism-isolating loop (4), upper magnetic guiding loop (5), lower magnetic guiding loop (6), permanent magnet (7), stator sleeve (8)
With stator lock ring (9)；
Described rotor-support-foundation system specifically includes that spheric rotor (10) unshakable in one's determination, rotor sleeve (11) and rotor lock ring
(12)；
Described upper sphere stator core (1) 4 magnetic pole of the stator of composition, described lower peripheral surface stator core (2) forms 4 and determines
Sub-magnetic pole, 8, the upper and lower two ends of magnetic bearing of composition magnetic pole of the stator, separately constitutes X, the magnetic pole of the positive negative direction of Y-axis, Mei Geding altogether
Sub-magnetic pole is wound with described magnetizing coil (3)；
Described magnetism-isolating loop (4) is positioned between sphere stator core (1) and lower peripheral surface stator core (2), described on lead
Magnet ring (5) is positioned at described upper sphere stator core (1) radial outside, and described lower magnetic guiding loop (6) is positioned at described lower peripheral surface
Stator core (2) radial outside, described permanent magnet (7) be positioned at described upper magnetic guiding loop (5) and lower magnetic guiding loop (6) it
Between；
It is inside that described upper magnetic guiding loop (5), lower magnetic guiding loop (6) and permanent magnet (7) are positioned at described stator sleeve (8) footpath
Side, and be fixedly mounted on described stator sleeve (8) by described stator lock ring (9)；
Described spheric rotor (10) unshakable in one's determination is positioned at described rotor sleeve (11) radial outside, and by described rotor lock ring
(12) being fixedly mounted on described rotor sleeve (11), described spheric rotor (10) spherical outside surface unshakable in one's determination is fixed with upper sphere
The gap left between son (1) Internal Spherical Surface unshakable in one's determination and lower peripheral surface stator core (2) Internal Spherical Surface, forms air gap
(13)。
Two-freedom internal rotor permanent-magnetic the most according to claim 1 biases spherical radial direction magnetic bearing, it is characterised in that:
Described upper sphere stator core (1) and the magnetic pole of lower peripheral surface stator core (2) all use pole shoe structure.
Two-freedom internal rotor permanent-magnetic the most according to claim 1 biases spherical radial direction magnetic bearing, it is characterised in that:
Described upper magnetic guiding loop (5) and lower magnetic guiding loop (6) are 1J85 permeability magnetic material.
Two-freedom internal rotor permanent-magnetic the most according to claim 1 biases spherical radial direction magnetic bearing, it is characterised in that:
Described permanent magnet (7) is shirt cobalt alloy or Nd Fe B alloys material.
Two-freedom internal rotor permanent-magnetic the most according to claim 1 biases spherical radial direction magnetic bearing, it is characterised in that:
Described permanent magnet (7) is axial annulus, magnetizes vertically.
Two-freedom internal rotor permanent-magnetic the most according to claim 1 biases spherical radial direction magnetic bearing, it is characterised in that:
The spherical radius of described upper sphere stator core (1) and the spherical radius of lower peripheral surface stator core (2) are equal, and two
The centre of sphere of person is completely superposed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410648252.5A CN104314976B (en) | 2014-11-14 | 2014-11-14 | Two-degree-of-freedom internal rotor permanent magnet biased spherical radial magnetic bearing |
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| CN201410648252.5A CN104314976B (en) | 2014-11-14 | 2014-11-14 | Two-degree-of-freedom internal rotor permanent magnet biased spherical radial magnetic bearing |
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| CN104314976B true CN104314976B (en) | 2017-01-11 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156475B (en) * | 2015-09-12 | 2018-09-28 | 北京科技大学 | A kind of rotation modulation radial spherical permanent magnet biased magnetic bearing |
| CN107607099B (en) * | 2017-08-31 | 2020-05-22 | 北京石油化工学院 | Magnetic suspension control sensitive gyroscope with detection and control co-location |
| CN111828475B (en) * | 2020-06-22 | 2022-03-04 | 北京控制工程研究所 | Radial magnetic bearing structure and multi-degree-of-freedom magnetic suspension mechanism comprising same |
| CN111946748B (en) * | 2020-08-20 | 2021-11-16 | 天津市城西广源电力工程有限公司 | Magnetic processing bearing in wind motor and processing equipment thereof |
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|---|---|---|---|---|
| CN1760560A (en) * | 2005-09-09 | 2006-04-19 | 河北农业大学 | Thrust radial bidirectional magnetic suspension bearing |
| CN101994761A (en) * | 2010-08-17 | 2011-03-30 | 北京航空航天大学 | Double-permanent magnet outer-rotor permanent magnet biased radial magnetic bearing |
| CN202391966U (en) * | 2011-12-30 | 2012-08-22 | 张冰青 | Magnetic suspension bearings and magnetic suspension motor |
| CN204267529U (en) * | 2014-11-14 | 2015-04-15 | 北京石油化工学院 | A kind of two-freedom internal rotor permanent-magnetic is biased spherical radial direction magnetic bearing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013529907A (en) * | 2010-05-24 | 2013-07-25 | ザ トラスティーズ オブ コロンビア ユニヴァーシティ イン ザ シティ オブ ニューヨーク | NGAL protein variants and uses thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1760560A (en) * | 2005-09-09 | 2006-04-19 | 河北农业大学 | Thrust radial bidirectional magnetic suspension bearing |
| CN101994761A (en) * | 2010-08-17 | 2011-03-30 | 北京航空航天大学 | Double-permanent magnet outer-rotor permanent magnet biased radial magnetic bearing |
| CN202391966U (en) * | 2011-12-30 | 2012-08-22 | 张冰青 | Magnetic suspension bearings and magnetic suspension motor |
| CN204267529U (en) * | 2014-11-14 | 2015-04-15 | 北京石油化工学院 | A kind of two-freedom internal rotor permanent-magnetic is biased spherical radial direction magnetic bearing |
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