CN104389903B - A kind of dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing - Google Patents
A kind of dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing Download PDFInfo
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- CN104389903B CN104389903B CN201410648120.2A CN201410648120A CN104389903B CN 104389903 B CN104389903 B CN 104389903B CN 201410648120 A CN201410648120 A CN 201410648120A CN 104389903 B CN104389903 B CN 104389903B
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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
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
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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
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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
- F16C32/0468—Details of the magnetic circuit of moving parts of the magnetic circuit, e.g. of the rotor
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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
- F16C32/0474—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 kind of dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing, including stator system and rotor-support-foundation system two parts, stator system specifically includes that on stator magnetic guiding loop, stator lower magnetic guiding loop, stator permanent magnet, stator sleeve and stator lock ring on sphere iron core, stator lower peripheral surface iron core, magnetizing coil, stator magnetism-isolating loop, stator；Rotor-support-foundation system specifically includes that on rotor magnetic guiding loop, rotor lower magnetic guiding loop, rotor permanent magnet, rotor sleeve and rotor lock ring on sphere iron core, rotor lower peripheral surface iron core, rotor magnetism-isolating loop, rotor；Overcome because of when at each magnetic pole, electromagnetic force is unequal, and the radial direction twisting disturbance torque produced, improve the precision of magnetic suspension universal momenttum wheel gyroscopic couple, reduce the residual magnetic moment that radial direction magnetic bearing produces.
Description
Technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, particularly relate to a kind of dual permanent-magnet external rotor permanent magnet biases ball face diameter
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 permanent magnetic field that the latter utilizes permanent magnet to produce provides bias magnetic field, substitutes pure electricity
The bias magnetic field that in magnetic magnetic bearing, bias current produces, can be greatly reduced magnetic bearings control electric current, reduces power amplifier merit
Consumption, reduces magnetic bearing volume, improves bearing capacity.So permanent magnet biased magnetic bearing is in magnetic suspension air blower, magnetic suspension
Oil & Gas Storage compressor, magnetic suspension motor, magnetic levitation energy storage flywheel, Control for Magnetic Momentum Wheel, magnetic suspension control torque gyroscope
It is used widely etc. the conjunction of high speed sports ground.
Magnetically levitated flywheel eliminates the fretting wear of mechanical bearing, it is not necessary to lubrication, has high torque precision, micro-vibration and master
The advantages such as the function of dynamic vibration suppression, are the preferable inertia actuator of high accuracy earth observation satellite.Magnetically levitated flywheel exists
Advantage in terms of rotating speed so that it is can be operated in reaction for counteraction flyback, can be operated in again bias state and use
Take turns in bias momentum, improve rotating speed further and can be additionally used in the appearance dual-purpose flywheel of control energy storage.Above-mentioned three major types magnetically levitated flywheel is defeated
Go out torque accuracy high, but moment is less, it is impossible to meet the demand that the attitude of satellite is motor-driven.The universal momenttum wheel of magnetic suspension is by control
In flywheel rotor equator processed, radially two-freedom twists magnetic bearing deflection torque, changes flywheel rotor rotary shaft direction, it is possible to
Output moment, big gyroscopic couple moment, thus the agility realizing the attitude of satellite is motor-driven.Gyroscopic couple precision and residual magnetic moment are empty
Between by the important indicator of the universal flywheel of magnetic suspension.Improve gyroscopic couple precision, quick maneuvering satellite can be realized and realizing big angle
Spend motor-driven while, improve satellite earth observation resolution.For low-orbit satellite, the magnetic field that earth magnetism produces can be with whole
Star residual magnetic moment interacts and produces disturbance torque, affects gesture stability torque accuracy.Additionally, the universal momenttum wheel of magnetic suspension is certainly
Body residual magnetic moment may produce impact to the certainty of measurement of gaussmeter on star.Therefore, quick maneuvering satellite is in design process
In, torque accuracy and the residual magnetic moment size of momenttum wheel universal to magnetic suspension have strict demand.
Showing through analyzing, the premise of the gyroscopic couple precision improving the output of magnetic suspension universal momenttum wheel is, flywheel rotor translation
During motion, its translation electromagnetic force does not interferes with radial deflection moment, it is desirable to the electromagnetic force in three translation directions and radial direction two
The deflection electromagnetic torque in direction is full decoupled.
In prior art, the external rotor permanent magnet bias radial direction magnetic bearing described in patent ZL200510011270.3, utilize and place
Permanent magnet in two magnetic conduction interannulars produces bias magnetic field, substitutes the bias magnetic field that pure electromagnetism magnetic bearing bias current produces, fall
Low system power dissipation, reduces magnetic bearing volume and weight.But it use a permanent magnet circle ring, for asymmetric permanent magnetism
Body structure, can produce bigger residual magnetic moment, thus affect the residual magnetic moment of whole star；Described in patent ZL201010531919.5
Dual permanent-magnet external rotor permanent magnet bias radial direction magnetic bearing, at the symmetrically placed permanent magnet of magnetic bearing stator and rotor, for symmetry
Magnet structure, is greatly reduced the residual magnetic moment that radial direction magnetic bearing produces.
Above-mentioned prior art at least has the disadvantage in that
Described in patent ZL200510011270.3 and patent ZL201010531919.5, external rotor radial magnetic bearing magnetic pole strength is
The face of cylinder, electromagnetic attraction vertical pole surface all the time suffered by rotor.When the flywheel rotor axes of inertia and magnetic bearing stator geometrical axis
When deflecting, the electromagnetic attraction size in 8 magnetic pole strengths of magnetic bearing is unequal, and is all not directed to flywheel rotor barycenter, from
And flywheel rotor can be produced radially twisting disturbance torque, reduce the gyroscopic couple precision of the universal momenttum wheel of magnetic suspension.
Summary of the invention
It is an object of the invention to provide the dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing that a kind of precision is high.
It is an object of the invention to be achieved through the following technical solutions:
The dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing of the present invention, including stator system and rotor-support-foundation system two
Point, stator system specifically include that sphere iron core on stator, stator lower peripheral surface iron core, magnetizing coil, stator magnetism-isolating loop,
Magnetic guiding loop, stator lower magnetic guiding loop, stator permanent magnet, stator sleeve and stator lock ring on stator；Rotor-support-foundation system mainly wraps
Include: magnetic guiding loop on sphere iron core, rotor lower peripheral surface iron core, rotor magnetism-isolating loop, rotor on rotor, rotor lower magnetic guiding loop,
Rotor permanent magnet, rotor sleeve and rotor lock ring；4 magnetic poles of sphere iron core composition on stator, stator lower peripheral surface iron core forms
4 magnetic poles, on stator, sphere is unshakable in one's determination and 8, the upper and lower two ends of magnetic bearing of stator lower peripheral surface iron core composition magnetic pole, separately constitute X,
The sphere magnetic pole of the positive negative direction of Y-axis, each magnetic pole of the stator is wound with magnetizing coil, and stator magnetism-isolating loop is positioned at sphere ferrum on stator
Between the heart and stator lower peripheral surface iron core, on stator, magnetic guiding loop is positioned at sphere iron core radially inner side on stator, stator lower magnetic guiding loop
Being positioned at stator lower peripheral surface iron core radially inner side, stator permanent magnet between magnetic guiding loop and stator lower magnetic guiding loop, is determined on stator
On son, on sphere iron core, stator lower peripheral surface iron core, stator magnetism-isolating loop, stator, magnetic guiding loop, stator lower magnetic guiding loop and stator be forever
Magnet is positioned at stator sleeve radial outside, and is fixedly mounted on stator sleeve by stator lock ring, and on rotor, sphere is unshakable in one's determination
Being positioned at sphere iron core radial outside on stator, on rotor, sphere iron core Internal Spherical Surface leaves one with sphere iron core spherical outside surface on stator
Fixed gap, forms air gap, and rotor lower peripheral surface iron core is positioned at stator lower peripheral surface iron core radial outside, rotor lower peripheral surface
Internal Spherical Surface unshakable in one's determination leaves certain gap with stator lower peripheral surface iron core spherical outside surface, forms air gap, and rotor magnetism-isolating loop is positioned at
On rotor between sphere iron core and rotor lower peripheral surface iron core, on rotor, magnetic guiding loop is positioned at sphere iron core radial outside on rotor,
Rotor lower magnetic guiding loop is positioned at rotor lower peripheral surface iron core radial outside, and rotor permanent magnet is positioned on rotor leads under magnetic guiding loop and rotor
Between magnet ring, rotor is led under magnetic guiding loop, rotor on sphere iron core, rotor lower peripheral surface iron core, rotor magnetism-isolating loop, rotor
Magnet ring and rotor permanent magnet are positioned at rotor sleeve radially inner side, and are fixedly mounted on rotor sleeve by rotor lock ring.
As seen from the above technical solution provided by the invention, the dual permanent-magnet external rotor permanent magnet that the embodiment of the present invention provides
Biases ball face radial direction magnetic bearing, owing to changing existing magnetic bearing magnetic pole strength into sphere, makes magnetic bearing rotor in each magnetic pole place
The electromagnetic force being subject to, all the time through the centre of sphere of spheric rotor iron core sphere magnetic pole, overcomes because at each magnetic pole, electromagnetic force is unequal
Time, and the radial direction twisting disturbance torque produced, improve the precision of magnetic suspension universal momenttum wheel gyroscopic couple.Use simultaneously
Dual permanent-magnet structure, all places volume at magnetic bearing stator and rotor equal, the permanent magnet that magnetizing direction is contrary, does not increase
Add magnetic bearing volume, reduce the residual magnetic moment that radial direction magnetic bearing produces.
Accompanying drawing explanation
The axial cross section structure of the dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing that Fig. 1 provides for the embodiment of the present invention
Schematic diagram；
The axial end structure of the dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing that Fig. 2 provides for the embodiment of the present invention
Schematic diagram；
Fig. 3 a is that in the embodiment of the present invention, on stator, sphere is unshakable in one's determination and stator lower peripheral surface iron core sectional structure schematic diagram；
Fig. 3 b is that in the embodiment of the present invention, on stator, sphere is unshakable in one's determination and stator lower peripheral surface iron core three dimensional structure schematic diagram；
Fig. 4 a is sphere iron core and rotor lower peripheral surface iron core sectional structure schematic diagram on embodiment of the present invention rotor；
Fig. 4 b is sphere iron core and rotor lower peripheral surface iron core three dimensional structure schematic diagram on embodiment of the present invention rotor.
Detailed description of the invention
The embodiment of the present invention will be described in further detail below.
The dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing of the present invention, its preferably detailed description of the invention is:
Including stator system and rotor-support-foundation system two parts, stator system specifically includes that on stator that sphere is unshakable in one's determination, ball under stator
Magnetic guiding loop, stator lower magnetic guiding loop, stator permanent magnet, stator sleeve on face iron core, magnetizing coil, stator magnetism-isolating loop, stator
Cylinder and stator lock ring；Rotor-support-foundation system specifically include that sphere iron core on rotor, rotor lower peripheral surface iron core, rotor magnetism-isolating loop,
Magnetic guiding loop, rotor lower magnetic guiding loop, rotor permanent magnet, rotor sleeve and rotor lock ring on rotor；Sphere iron core group on stator
Becoming 4 magnetic poles, stator lower peripheral surface iron core 4 magnetic poles of composition, on stator, sphere is unshakable in one's determination and stator lower peripheral surface iron core forms magnetic axis
Holding 8, upper and lower two ends magnetic pole, separately constitute X, the sphere magnetic pole of the positive negative direction of Y-axis, each magnetic pole of the stator is wound with excitatory line
Circle, stator magnetism-isolating loop is on stator between sphere iron core and stator lower peripheral surface iron core, and on stator, magnetic guiding loop is positioned on stator
Sphere iron core radially inner side, stator lower magnetic guiding loop is positioned at stator lower peripheral surface iron core radially inner side, and stator permanent magnet is positioned at stator
Between upper magnetic guiding loop and stator lower magnetic guiding loop, sphere iron core, stator lower peripheral surface iron core, stator magnetism-isolating loop, stator on stator
Upper magnetic guiding loop, stator lower magnetic guiding loop and stator permanent magnet are positioned at stator sleeve radial outside, and by the fixing peace of stator lock ring
Being contained on stator sleeve, on rotor, sphere iron core is positioned at sphere iron core radial outside on stator, ball in sphere iron core on rotor
Certain gap is left with sphere iron core spherical outside surface on stator in face, forms air gap, and rotor lower peripheral surface iron core is positioned at stator
Lower peripheral surface iron core radial outside, rotor lower peripheral surface iron core Internal Spherical Surface and stator lower peripheral surface iron core spherical outside surface leave certain between
Gap, forms air gap, and rotor magnetism-isolating loop between sphere iron core and rotor lower peripheral surface iron core, rotor is led on rotor
Magnet ring is positioned at sphere iron core radial outside on rotor, and rotor lower magnetic guiding loop is positioned at rotor lower peripheral surface iron core radial outside, rotor
Permanent magnet is on rotor between magnetic guiding loop and rotor lower magnetic guiding loop, and on rotor, sphere is unshakable in one's determination, rotor lower peripheral surface is unshakable in one's determination, turn
On sub-magnetism-isolating loop, rotor, magnetic guiding loop, rotor lower magnetic guiding loop and rotor permanent magnet are positioned at rotor sleeve radially inner side, and pass through
Rotor lock ring is fixedly mounted on rotor sleeve.
The magnetic pole that on described stator, sphere is unshakable in one's determination and stator lower peripheral surface is unshakable in one's determination all uses pole shoe form to reduce under high rotating speed
Eddy-current loss and equivalent drag square.Magnetic pole spherical radius that on described stator, sphere is unshakable in one's determination and stator lower peripheral surface magnetic unshakable in one's determination
Pole spherical radius is equal, and both centre ofs sphere are completely superposed.Magnetic pole spherical radius that on described rotor, sphere is unshakable in one's determination and turning
The magnetic pole spherical radius of sub-lower peripheral surface iron core is equal, and both centre ofs sphere are completely superposed.Magnetic guiding loop on described stator, fixed
On sub-lower magnetic guiding loop, rotor, magnetic guiding loop and rotor lower magnetic guiding loop are 1J85,1J50 or electrical pure iron permeability magnetic material.Described
Stator permanent magnet and rotor permanent magnet be shirt cobalt alloy or Nd Fe B alloys material.Described stator permanent magnet and rotor are forever
Magnet is axial annulus, magnetizes vertically.Described stator permanent magnet is equal with the volume of rotor permanent magnet, and the side of magnetizing
To on the contrary.
The dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing of the present invention, overcomes the deficiencies in the prior art, uses
Radially translation and radially twisting uneoupled control, it is to avoid radially translation controls, to the interference that radially twisting controls, to reduce it
The magnetic disturbance to external world of self remanent magnetism.
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 stator permanent magnet N pole,
By magnetic guiding loop, rotor on sphere iron core, rotor on sphere iron core, air gap, rotor on magnetic guiding loop, stator on stator forever
Magnet S pole, rotor permanent magnet N pole, rotor lower magnetic guiding loop, rotor lower peripheral surface iron core, air gap, stator lower peripheral surface be unshakable in one's determination,
Stator lower magnetic guiding loop returns to stator permanent magnet S pole, forms the main magnetic circuit of magnetic bearing.As in figure 2 it is shown, swash with upper end Y-axis forward
As a example by the magnetic flux that magnetic coil electric current produces, its path is: the Y-axis positive magnetic pole of sphere iron core, Y-axis forward air gap on stator
Sphere the other three direction magnetic unshakable in one's determination, that then formed to sphere iron core on the other three direction air gap, stator on rotor
Pole, return to the Y-axis positive magnetic pole that sphere iron core on stator is formed, constitute 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 shaft and its stator geometrical axis
When there is a low-angle, at each stator pole face, the electromagnetic attraction suffered by rotor is all the time along the footpath of magnetic bearing rotor sphere
To direction, and all through the centre of sphere of spheric rotor iron core.The centre of sphere unshakable in one's determination with rotor sphere when momenttum wheel rotor centroid is complete
During coincidence, the electromagnetic attraction that 8 magnetic pole strengths go out is 0 to the moment that momenttum wheel rotor centroid produces, will not be to output gyro power
Radial direction torque needed for square produces interference, it is achieved that radially translation controls, to the decoupling that radially twisting controls, to improve
Gyroscopic couple precision.Additionally, the magnetic moment of energization excitation coil is that (I is magnetizing coil electric current to P=I × S, and S is magnetizing coil
Area), direction meets right-hand screw rule.Owing in magnetizing coil, electrical current is paired Opposite side loading, so every pair
The residual magnetic moment of two magnetizing coils of coil is equal in magnitude, in opposite direction, and external conjunction magnetic moment is zero.For soft magnetic materials
For, its magnetic circuit is for be axially uniformly distributed, so its magnetic moment externally showed also is zero.For permanent magnet, its magnetic
Square size is P=Hc × V (Hc is the coercivity of permanent magnet, and V is the volume of permanent magnet), and direction is magnetizing of permanent magnet
Direction.For single permanent magnet outer rotor radial direction magnetic bearing, its remanence direction is permanent magnet magnetizing direction, externally performance one
Bigger axial magnetic moment component, size is directly proportional to the volume of permanent magnet.Axial magnetic is produced by compensating radial direction magnetic bearing
Square, the present invention adds in magnetic bearing stator and rotor that volume is equal, the permanent magnet that magnetizing direction is contrary, it is achieved remanent magnetism
The compensation of square.
Present invention advantage compared with prior art is:
The present invention, on the basis of existing external 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 of spheric rotor iron core sphere magnetic pole, overcome because of each magnetic
When at pole, electromagnetic force is unequal, and the radial direction twisting disturbance torque produced, improve magnetic suspension universal momenttum wheel gyroscopic couple
Precision.Using dual permanent-magnet structure simultaneously, all place volume at magnetic bearing stator and rotor equal, magnetizing direction is contrary
Permanent magnet, do not increase magnetic bearing volume, reduce radial direction magnetic bearing produce residual magnetic moment.
Specific embodiment:
As shown in Figure 1, 2, a kind of dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing, mainly by stator system and
Rotor-support-foundation system two parts form, it is characterised in that: stator system specifically includes that sphere iron core 1 on stator, stator lower peripheral surface
Magnetic guiding loop 5 on unshakable in one's determination 2, magnetizing coil 3, stator magnetism-isolating loop 4, stator, stator lower magnetic guiding loop 6, stator permanent magnet 7, fixed
Sub-sleeve 8 and stator lock ring 9；Rotor-support-foundation system specifically includes that sphere iron core 10 on rotor, rotor lower peripheral surface iron core 11, turns
Magnetic guiding loop 13, rotor lower magnetic guiding loop 14, rotor permanent magnet 15, rotor sleeve 16 and rotor lock on sub-magnetism-isolating loop 12, rotor
Ring 17；Sphere 14 magnetic poles of composition unshakable in one's determination on stator, stator lower peripheral surface 24 magnetic poles of composition unshakable in one's determination, sphere iron core 1 on stator
2 composition magnetic bearing upper and lower two ends 8 magnetic poles unshakable in one's determination with stator lower peripheral surface, separately constitute X, the sphere magnetic of the positive negative direction of Y-axis
Pole, each magnetic pole of the stator is wound with magnetizing coil 3, and stator magnetism-isolating loop 4 is positioned at sphere unshakable in one's determination 1 and stator lower peripheral surface ferrum on stator
Between the heart 2, on stator, magnetic guiding loop 5 is positioned at 1 radially inner side unshakable in one's determination of sphere on stator, and stator lower magnetic guiding loop 6 is positioned at ball under stator
Face 2 radially inner sides unshakable in one's determination, stator permanent magnet 7 on stator between magnetic guiding loop 5 and stator lower magnetic guiding loop 6, sphere on stator
Magnetic guiding loop 5, stator lower magnetic guiding loop 6 and stator permanent magnet on iron core 1, stator lower peripheral surface iron core 2, stator magnetism-isolating loop 4, stator
7 are positioned at stator sleeve 8 radial outside, and are fixedly mounted on stator sleeve 8 by stator lock ring 9, and on rotor, sphere is unshakable in one's determination
10 are positioned at 1 radial outside unshakable in one's determination of sphere on stator, sphere 10 Internal Spherical Surface unshakable in one's determination 1 spherical outside surface unshakable in one's determination with sphere on stator on rotor
Leaving certain gap, form air gap 18, rotor lower peripheral surface iron core 11 is positioned at stator lower peripheral surface 2 radial outsides unshakable in one's determination,
Rotor lower peripheral surface 11 Internal Spherical Surface unshakable in one's determination 2 spherical outside surfaces unshakable in one's determination with stator lower peripheral surface leave certain gap, form air gap 18,
Rotor magnetism-isolating loop 12 is on rotor between sphere unshakable in one's determination 10 and rotor lower peripheral surface iron core 11, and on rotor, magnetic guiding loop 13 is positioned at and turns
Sphere 10 radial outsides unshakable in one's determination on son, rotor lower magnetic guiding loop 14 is positioned at rotor lower peripheral surface 11 radial outsides unshakable in one's determination, rotor permanent magnet
Body 15 is on rotor between magnetic guiding loop 13 and rotor lower magnetic guiding loop 14, and sphere iron core 10 on rotor, rotor lower peripheral surface are unshakable in one's determination
11, on rotor magnetism-isolating loop 12, rotor, magnetic guiding loop 13, rotor lower magnetic guiding loop 14 and rotor permanent magnet 15 are positioned at rotor sleeve 16
Radially inner side, and be fixedly mounted on rotor sleeve 16 by rotor lock ring 17.
Fig. 3 a is sphere unshakable in one's determination 1 and stator lower peripheral surface 2 sectional views unshakable in one's determination on stator in the present invention, and Fig. 3 b is stator in the present invention
Upper sphere unshakable in one's determination 1 and stator lower peripheral surface 2 three dimensional structure schematic diagrams unshakable in one's determination, 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 sphere unshakable in one's determination 10 and rotor lower peripheral surface 11 sectional views unshakable in one's determination on rotor of the present invention, and Fig. 4 b is transfer of the present invention
Sphere unshakable in one's determination 10 and rotor lower peripheral surface 11 three dimensional structure schematic diagrams unshakable in one's determination on son, its material is the stalloy that magnetic property is good
Form as the magnetic material punching presses such as electrical steel sheet 1J22,1J50,1J79,1J85, electrical pure iron fold, magnetic suspension ten thousand
When momenttum wheel rotor is in equilbrium position, the Internal Spherical Surface centre of sphere of sphere iron core 10 and rotor lower peripheral surface iron core 11 on rotor
The centre of sphere of the centre of sphere of the Internal Spherical Surface centre of sphere 1 spherical outside surface unshakable in one's determination with sphere on stator and the spherical outside surface of stator lower peripheral surface iron core 2 overlaps.
Stator magnetism-isolating loop 4 and the material of rotor magnetism-isolating loop 12 used by foregoing invention scheme are the duralumin that heat conductivility is good
The non-magnetic alloys such as 2A12, superduralumin 7A09.On stator on magnetic guiding loop 5, stator lower magnetic guiding loop 6, rotor magnetic guiding loop 13 and turn
Sub-lower magnetic guiding loop 14 is the 1J85 permeability magnetic material that magnetic property is good.The material of stator permanent magnet 7 and rotor permanent magnet 15 is equal
The shirt cobalt alloy good for magnetic property or Nd Fe B alloys, the volume of stator permanent magnet 7 and rotor permanent magnet 15 is equal in magnitude,
It is axial circular ring structure, magnetizes vertically, and magnetizing direction is contrary.Magnetizing coil 3 is with after the copper wire winding of well conducting
Paint-dipping drying forms.It is stainless that stator sleeve 8 and rotor sleeve 16 material are the heat conductivity ability weak magnetic of good 1Cr18Ni9Ti
Steel.Stator lock ring 9 and rotor lock ring 17 material are the good duralumin 2A12 of heat conductivility, superduralumin 7A09 etc. and close without magnetic
Gold.
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 (8)
1. a dual permanent-magnet external rotor permanent magnet biases ball face 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 (1) unshakable in one's determination on stator, stator lower peripheral surface (2), magnetizing coil unshakable in one's determination
(3), magnetic guiding loop (5), stator lower magnetic guiding loop (6), stator permanent magnet on stator magnetism-isolating loop (4), stator
(7), stator sleeve (8) and stator lock ring (9)；
Described rotor-support-foundation system specifically include that on rotor sphere (10) unshakable in one's determination, rotor lower peripheral surface (11) unshakable in one's determination, rotor every
Magnetic guiding loop (13), rotor lower magnetic guiding loop (14), rotor permanent magnet (15), rotor set on magnet ring (12), rotor
Cylinder (16) and rotor lock ring (17)；
4 magnetic poles of sphere (1) unshakable in one's determination composition on described stator, 4 magnetic poles of described stator lower peripheral surface (2) unshakable in one's determination composition,
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 stator of the positive negative direction of Y-axis, each stator magnet altogether
Pole is wound with described magnetizing coil (3), and described stator magnetism-isolating loop (4) is positioned at sphere on described stator (1) and institute unshakable in one's determination
Stating between stator lower peripheral surface (2) unshakable in one's determination, on described stator, magnetic guiding loop (5) is positioned at (1) footpath unshakable in one's determination of sphere on described stator
To inner side, described stator lower magnetic guiding loop (6) is positioned at described stator lower peripheral surface (2) radially inner side unshakable in one's determination, and described stator is forever
Magnet (7) is positioned on described stator between magnetic guiding loop (5) and described stator lower magnetic guiding loop (6), sphere on described stator
Magnetic guiding loop on (1) unshakable in one's determination, described stator lower peripheral surface (2), described stator magnetism-isolating loop (4), described stator unshakable in one's determination
(5), to be positioned at described stator sleeve (8) footpath outside for described stator lower magnetic guiding loop (6) and described stator permanent magnet (7)
Side, and be fixedly mounted on described stator sleeve (8) by described stator lock ring (9)；
On described rotor, sphere (10) unshakable in one's determination is positioned at (1) radial outside unshakable in one's determination of sphere on described stator, ball on described rotor
(10) Internal Spherical Surface unshakable in one's determination (1) spherical outside surface unshakable in one's determination with sphere on described stator in face leaves gap, forms air gap
(18), described rotor lower peripheral surface (11) unshakable in one's determination is positioned at described stator lower peripheral surface (2) radial outside unshakable in one's determination, described rotor
Lower peripheral surface (11) Internal Spherical Surface unshakable in one's determination (2) spherical outside surface unshakable in one's determination with described stator lower peripheral surface leaves gap, forms air gap
(18)；
It is unshakable in one's determination that described rotor magnetism-isolating loop (12) is positioned at sphere (10) unshakable in one's determination and described rotor lower peripheral surface on described rotor
(11), between, on described rotor, magnetic guiding loop (13) is positioned at (10) radial outside unshakable in one's determination of sphere on described rotor, described
Rotor lower magnetic guiding loop (14) is positioned at described rotor lower peripheral surface (11) radial outside unshakable in one's determination, described rotor permanent magnet (15)
Being positioned on described rotor between magnetic guiding loop (13) and described rotor lower magnetic guiding loop (14), on described rotor, sphere is unshakable in one's determination
(10), magnetic guiding loop on described rotor lower peripheral surface (11), described rotor magnetism-isolating loop (12), described rotor unshakable in one's determination
(13), described rotor lower magnetic guiding loop (14) and described rotor permanent magnet (15) are positioned at described rotor sleeve (16) footpath
To inner side, and it is fixedly mounted on described rotor sleeve (16) by described rotor lock ring (17).
Dual permanent-magnet external rotor permanent magnet biases ball face the most according to claim 1 radial direction magnetic bearing, it is characterised in that: institute
On the stator stated, the magnetic pole of sphere (1) unshakable in one's determination and described stator lower peripheral surface (2) unshakable in one's determination all uses pole shoe structure.
Dual permanent-magnet external rotor permanent magnet biases ball face the most according to claim 1 radial direction magnetic bearing, it is characterised in that: institute
The magnetic pole spherical radius of sphere unshakable in one's determination (1) and the magnetic pole spherical radius of described stator lower peripheral surface (2) unshakable in one's determination on the stator stated
Equal, and both centre ofs sphere are completely superposed.
Dual permanent-magnet external rotor permanent magnet biases ball face the most according to claim 1 radial direction magnetic bearing, it is characterised in that: institute
The magnetic pole spherical radius of sphere unshakable in one's determination (10) and the magnetic pole sphere half of described rotor lower peripheral surface (11) unshakable in one's determination on the rotor stated
Footpath is equal, and both centre ofs sphere are completely superposed.
Dual permanent-magnet external rotor permanent magnet biases ball face the most according to claim 1 radial direction magnetic bearing, it is characterised in that: institute
Magnetic guiding loop (13) and described turn on magnetic guiding loop (5), described stator lower magnetic guiding loop (6), described rotor on the stator stated
Sub-lower magnetic guiding loop (14) is 1J85,1J50 or electrical pure iron permeability magnetic material.
Dual permanent-magnet external rotor permanent magnet biases ball face the most according to claim 1 radial direction magnetic bearing, it is characterised in that: institute
The stator permanent magnet (7) stated and described rotor permanent magnet (15) are shirt cobalt alloy or Nd Fe B alloys material.
Dual permanent-magnet external rotor permanent magnet biases ball face the most according to claim 1 radial direction magnetic bearing, it is characterised in that: institute
Stator permanent magnet (7) and the described rotor permanent magnet (15) stated are axial annulus, magnetize vertically.
Dual permanent-magnet external rotor permanent magnet biases ball face the most according to claim 1 radial direction magnetic bearing, it is characterised in that: institute
The stator permanent magnet (7) stated is equal with the volume of described rotor permanent magnet (15), and magnetizing direction is contrary.
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| CN201410648120.2A CN104389903B (en) | 2014-11-15 | 2014-11-15 | A kind of dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing |
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| CN201410648120.2A CN104389903B (en) | 2014-11-15 | 2014-11-15 | A kind of dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing |
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| CN104389903A CN104389903A (en) | 2015-03-04 |
| CN104389903B true CN104389903B (en) | 2016-11-02 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2016208734A (en) * | 2015-04-24 | 2016-12-08 | 株式会社日本自動車部品総合研究所 | Electric motor, control device, and motor control system |
| CN104948583B (en) * | 2015-06-29 | 2017-06-16 | 北京科技大学 | A kind of twin coil axial direction pure electromagnetism magnetic bearing of sphere |
| CN106151271A (en) * | 2016-08-15 | 2016-11-23 | 江苏大学 | A kind of five degree of freedom external rotor permanent magnet biases spherical magnetic bearing |
| CN107327483B (en) * | 2017-07-27 | 2019-02-05 | 江苏大学 | A kind of vehicle-mounted flying wheel battery double spherical surface hybrid magnetic bearings of alternating current-direct current five degree of freedom |
| CN110011440A (en) * | 2019-03-28 | 2019-07-12 | 南京工程学院 | A kind of axial permanent magnetic spherical surface magnetically levitated flywheel motor |
| 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 |
| CN114857171B (en) * | 2022-07-07 | 2022-09-30 | 山东天瑞重工有限公司 | Outer rotor radial decoupling hybrid magnetic bearing |
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| CN1284936C (en) * | 2005-09-09 | 2006-11-15 | 河北农业大学 | Thrust radial bidirectional magnetic suspension bearing |
| PL215980B1 (en) * | 2009-12-14 | 2014-02-28 | Akad Gorniczo Hutnicza | Active magnetic bearing and control system for the active magnetic bearing |
| CN101994761B (en) * | 2010-08-17 | 2014-04-23 | 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 |
| CN204267530U (en) * | 2014-11-15 | 2015-04-15 | 北京石油化工学院 | A kind of dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing |
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