CN204267530U - 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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- CN204267530U CN204267530U CN201420686090.XU CN201420686090U CN204267530U CN 204267530 U CN204267530 U CN 204267530U CN 201420686090 U CN201420686090 U CN 201420686090U CN 204267530 U CN204267530 U CN 204267530U
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Abstract
The utility model discloses a kind of dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing, comprise stator system and rotor-support-foundation system two-part, stator system mainly comprises: 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, field coil, stator magnetism resistent ring, stator on stator; Rotor-support-foundation system mainly comprises: 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 on rotor; Overcome because of each magnetic pole place electromagnetic force unequal time, and produce radial direction twisting disturbance torque, improve the precision of the universal momenttum wheel gyrostatic moment of magnetic suspension, reduce radial direction magnetic bearing produce residual magnetic moment.
Description
Technical field
The utility model relates to a kind of non-contact magnetically suspension bearing, particularly relates to a kind of dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing.
Background technique
Magnetic suspension bearing is divided into pure electromagnetism magnetic bearing and permanent magnet biased hybrid magnetic bearing, the former utilizes bias current to provide bias magnetic field, its electric current is comparatively large, power consumption is large, the permanent magnetic field that the latter utilizes permanent magnet to produce provides bias magnetic field, substitute the bias magnetic field that in pure electromagnetism magnetic bearing, bias current produces, can greatly reduce magnetic bearings control electric current, reduce power cost of power amplifier, reduce magnetic bearing volume, improve bearing capacity.Be used widely so permanent magnet biased magnetic bearing closes at high speed sports grounds such as 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 gyroscopes.
Magnetically levitated flywheel eliminates the fretting wear of mechanical bearing, and without the need to lubrication, having the advantage such as function of high torque precision, micro-vibration and Active vibration suppression, is the desirable inertia actuator of highi degree of accuracy earth observation satellite.The advantage of magnetically levitated flywheel in rotating speed, makes it can be operated in reaction for counteraction flyback, can be operated in again bias state and take turns for bias momentum, improves rotating speed further and also can be used for the dual-purpose flywheel of appearance control energy storage.Above-mentioned three major types magnetically levitated flywheel output torque precision is high, but moment is less, can not meet the demand that satellite attitude is motor-driven.The universal momenttum wheel of magnetic suspension, by controlling radial two-freedom twisting magnetic bearing deflecting torque in flywheel rotor equator, changes flywheel rotor running shaft direction, can export moment large gyrostatic moment instantaneously, thus the agility realizing satellite attitude is motor-driven.Gyrostatic moment precision and residual magnetic moment are the important indicators of the universal flywheel of space magnetic suspension.Improve gyrostatic moment precision, quick maneuvering satellite can be realized while realizing large angle maneuver, improve the resolution of satellite earth observation.For low-orbit satellite, the magnetic field that earth magnetism produces can interact with whole star residual magnetic moment and produce disturbance torque, affects gesture stability torque accuracy.In addition, self residual magnetic moment of the universal momenttum wheel of magnetic suspension may have an impact to the measuring accuracy of magnetometer on star.Therefore, quick maneuvering satellite in the design process, has strict demand to the torque accuracy of the universal momenttum wheel of magnetic suspension and residual magnetic moment size.
Show by analysis, the prerequisite improving the gyrostatic moment precision that the universal momenttum wheel of magnetic suspension exports is, during flywheel rotor translational motion, its translation electromagnetic force can not affect radial deflection moment, requires that the deflection electromagnetic torque of the electromagnetic force in three translation directions and radial both direction is full decoupled.
In prior art, external rotor permanent magnet bias radial direction magnetic bearing described in patent ZL200510011270.3, the permanent magnet be positioned between two magnetic guiding loops is utilized to produce bias magnetic field, substitute the bias magnetic field that pure electromagnetism magnetic bearing bias current produces, reduce system power dissipation, reduce magnetic bearing volume and weight.But it use a permanent magnet circle ring, be asymmetric magnet structure, larger residual magnetic moment can be produced, thus affect the residual magnetic moment of whole star; Dual permanent-magnet external rotor permanent magnet bias radial direction magnetic bearing described in patent ZL201010531919.5, placing a permanent magnet in magnetic bearing stators and rotators symmetry, is symmetrical magnet structure, greatly reduces the residual magnetic moment that radial direction magnetic bearing produces.
At least there is following shortcoming in above-mentioned prior art:
Described in patent ZL200510011270.3 and patent ZL201010531919.5, external rotor radial magnetic bearing magnetic pole strength is cylndrical surface, and electromagnetic attraction suffered by rotor is vertical pole surface all the time.When the flywheel rotor principal axis of inertia and magnetic bearing stator geometrical axis deflect, electromagnetic attraction size in magnetic bearing 8 magnetic pole strengths is unequal, and do not point to flywheel rotor barycenter, thus radial twisting disturbance torque can be produced to flywheel rotor, reduce the gyrostatic moment precision of the universal momenttum wheel of magnetic suspension.
Model utility content
The purpose of this utility model is to provide the high dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing of a kind of precision.
The purpose of this utility model is achieved through the following technical solutions:
Dual permanent-magnet external rotor permanent magnet biases ball face of the present utility model radial direction magnetic bearing, comprise stator system and rotor-support-foundation system two-part, stator system mainly comprises: 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, field coil, stator magnetism resistent ring, stator on stator, rotor-support-foundation system mainly comprises: 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 on rotor, sphere iron core composition 4 magnetic poles on stator, stator lower peripheral surface iron core composition 4 magnetic poles, sphere iron core and stator lower peripheral surface iron core composition magnetic bearing 8, upper and lower two ends magnetic pole on stator, form X respectively, the sphere magnetic pole of the positive negative direction of Y-axis, each magnetic pole of the stator is wound with field coil, between the unshakable in one's determination and stator lower peripheral surface iron core of stator magnetism resistent ring sphere on stator, on stator, magnetic guiding loop is positioned at the radially inner side unshakable in one's determination of sphere on stator, stator lower magnetic guiding loop is positioned at stator lower peripheral surface radially inner side unshakable in one's determination, stator permanent magnet is on stator between magnetic guiding loop and stator lower magnetic guiding loop, on stator, sphere is unshakable in one's determination, stator lower peripheral surface is unshakable in one's determination, stator magnetism resistent ring, magnetic guiding loop on stator, stator lower magnetic guiding loop and stator permanent magnet are positioned at stator sleeve radial outside, and be fixedly mounted on stator sleeve by stator lock ring, on rotor, sphere iron core is positioned at the radial outside unshakable in one's determination of sphere on stator, on rotor, sphere inner ball surface unshakable in one's determination leaves certain gap with sphere iron core outer spherical surface on stator, form air gap, rotor lower peripheral surface iron core is positioned at stator lower peripheral surface radial outside unshakable in one's determination, rotor lower peripheral surface inner ball surface unshakable in one's determination and stator lower peripheral surface outer spherical surface unshakable in one's determination leave certain gap, form air gap, between the unshakable in one's determination and rotor lower peripheral surface iron core of rotor magnetism-isolating loop sphere on rotor, on rotor, magnetic guiding loop is positioned at the radial outside unshakable in one's determination of sphere on rotor, rotor lower magnetic guiding loop is positioned at rotor lower peripheral surface radial outside unshakable in one's determination, rotor permanent magnet is on rotor between magnetic guiding loop and rotor lower magnetic guiding loop, on rotor, sphere is unshakable in one's determination, rotor lower peripheral surface is unshakable in one's determination, rotor magnetism-isolating loop, magnetic guiding loop on rotor, rotor lower magnetic guiding loop and rotor permanent magnet are positioned at rotor sleeve radially inner side, and be fixedly mounted on rotor sleeve by rotor lock ring.
The technological scheme provided as can be seen from above-mentioned the utility model, the dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing that the utility model embodiment provides, owing to changing existing magnetic bearing magnetic pole strength into sphere, the electromagnetic force that magnetic bearing rotor is subject at each magnetic pole place is all the time through the centre of sphere of spheric rotor sphere magnetic pole unshakable in one's determination, overcome because of each magnetic pole place electromagnetic force unequal time, and the radial direction twisting disturbance torque produced, improve the precision of the universal momenttum wheel gyrostatic moment of magnetic suspension.Adopt dual permanent-magnet structure simultaneously, all place volume at magnetic bearing stators and rotators equal, the permanent magnet that magnetizing direction is contrary, do not increase magnetic bearing volume, reduce the residual magnetic moment that radial direction magnetic bearing produces.
Accompanying drawing explanation
The axial cross section structural representation of the dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing that Fig. 1 provides for the utility model embodiment;
The axial end structural representation of the dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing that Fig. 2 provides for the utility model embodiment;
Fig. 3 a is the unshakable in one's determination and stator lower peripheral surface iron core sectional structure schematic diagram of sphere on stator in the utility model embodiment;
Fig. 3 b is the unshakable in one's determination and stator lower peripheral surface iron core three-dimensional structure schematic diagram of sphere on stator in the utility model embodiment;
Fig. 4 a is sphere iron core and rotor lower peripheral surface sectional structure schematic diagram unshakable in one's determination on the utility model embodiment rotor;
Fig. 4 b is sphere iron core and rotor lower peripheral surface three-dimensional structure schematic diagram unshakable in one's determination on the utility model embodiment rotor.
Embodiment
To be described in further detail the utility model embodiment below.
Dual permanent-magnet external rotor permanent magnet biases ball face of the present utility model radial direction magnetic bearing, its preferably embodiment be:
Comprise stator system and rotor-support-foundation system two-part, stator system mainly comprises: 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, field coil, stator magnetism resistent ring, stator on stator, rotor-support-foundation system mainly comprises: 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 on rotor, sphere iron core composition 4 magnetic poles on stator, stator lower peripheral surface iron core composition 4 magnetic poles, sphere iron core and stator lower peripheral surface iron core composition magnetic bearing 8, upper and lower two ends magnetic pole on stator, form X respectively, the sphere magnetic pole of the positive negative direction of Y-axis, each magnetic pole of the stator is wound with field coil, between the unshakable in one's determination and stator lower peripheral surface iron core of stator magnetism resistent ring sphere on stator, on stator, magnetic guiding loop is positioned at the radially inner side unshakable in one's determination of sphere on stator, stator lower magnetic guiding loop is positioned at stator lower peripheral surface radially inner side unshakable in one's determination, stator permanent magnet is on stator between magnetic guiding loop and stator lower magnetic guiding loop, on stator, sphere is unshakable in one's determination, stator lower peripheral surface is unshakable in one's determination, stator magnetism resistent ring, magnetic guiding loop on stator, stator lower magnetic guiding loop and stator permanent magnet are positioned at stator sleeve radial outside, and be fixedly mounted on stator sleeve by stator lock ring, on rotor, sphere iron core is positioned at the radial outside unshakable in one's determination of sphere on stator, on rotor, sphere inner ball surface unshakable in one's determination leaves certain gap with sphere iron core outer spherical surface on stator, form air gap, rotor lower peripheral surface iron core is positioned at stator lower peripheral surface radial outside unshakable in one's determination, rotor lower peripheral surface inner ball surface unshakable in one's determination and stator lower peripheral surface outer spherical surface unshakable in one's determination leave certain gap, form air gap, between the unshakable in one's determination and rotor lower peripheral surface iron core of rotor magnetism-isolating loop sphere on rotor, on rotor, magnetic guiding loop is positioned at the radial outside unshakable in one's determination of sphere on rotor, rotor lower magnetic guiding loop is positioned at rotor lower peripheral surface radial outside unshakable in one's determination, rotor permanent magnet is on rotor between magnetic guiding loop and rotor lower magnetic guiding loop, on rotor, sphere is unshakable in one's determination, rotor lower peripheral surface is unshakable in one's determination, rotor magnetism-isolating loop, magnetic guiding loop on rotor, rotor lower magnetic guiding loop and rotor permanent magnet are positioned at rotor sleeve radially inner side, and be fixedly mounted on rotor sleeve by rotor lock ring.
On described stator, sphere magnetic pole unshakable in one's determination and stator lower peripheral surface iron core all adopts pole shoe form to reduce eddy current loss under high rotating speed and equivalent drag square.On described stator, the magnetic pole spherical radius of sphere iron core is equal with the magnetic pole spherical radius of stator lower peripheral surface iron core, and both centre ofs sphere overlap completely.On described rotor, the magnetic pole spherical radius of sphere iron core is equal with the magnetic pole spherical radius of rotor lower peripheral surface iron core, and both centre ofs sphere overlap completely.On described stator, on magnetic guiding loop, stator 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 are shirt cobalt alloy or Nd Fe B alloys material.Described stator permanent magnet and rotor permanent magnet are axial annulus, magnetize vertically.Described stator permanent magnet is equal with the volume of rotor permanent magnet, and magnetizing direction is contrary.
Dual permanent-magnet external rotor permanent magnet biases ball face of the present utility model radial direction magnetic bearing, overcome the deficiencies in the prior art, adopt radial translation and radial twisting uneoupled control, avoid the interference that radial translation controls to control radial direction twisting, reduce the magnetic disturbance to external world of himself remanent magnetism.
Principle of the present utility model is:
Permanent magnet provides permanent magnet bias magnetic field to magnetic bearing, bear the radial force suffered by magnetic bearing, the bias magnetic field forwards/reverse that the controlling magnetic field that field coil produces and permanent magnet produce superposes, and keeps magnetic bearing rotor air gap even, realizes the contactless suspension bearing of rotor.As shown in Figure 1, permanent magnetic circuit of the present utility model is: magnetic flux is from stator permanent magnet N pole, get back to stator permanent magnet S pole by magnetic guiding loop, rotor permanent 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 iron core, stator lower magnetic guiding loop on sphere iron core, rotor on sphere iron core, air gap, rotor on magnetic guiding loop, stator on stator, form the main magnetic circuit of magnetic bearing.As shown in Figure 2, for the magnetic flux that upper end Y-axis forward field coil electric current produces, its path is: sphere other three direction magnetic poles unshakable in one's determination, that then formed to sphere iron core on other three direction air gaps, stator on the Y-axis positive magnetic pole of sphere iron core, Y-axis forward air gap to rotor on stator, get back to the Y-axis positive magnetic pole that on stator, sphere iron core is formed, and forms closed-loop path.
When magnetic bearing rotor is in equilibrium position, the air gap at 8 magnetic pole strength places is completely equal, the electromagnetic attraction equal and opposite in direction at each magnetic pole strength place, suffered by magnetic bearing rotor make a concerted effort and resultant moment of force be zero.When magnetic bearing rotor shaft and its stator geometrical axis exist a small angle, at each stator pole face place, the electromagnetic attraction suffered by rotor all the time along the radial direction of magnetic bearing rotor sphere, and all through the centre of sphere of spheric rotor iron core.When momenttum wheel rotor centroid overlaps completely with the centre of sphere of rotor sphere iron core, the electromagnetic attraction that 8 magnetic pole strengths go out is 0 to the moment that momenttum wheel rotor centroid produces, interference can not be produced to the radial torque exported needed for gyrostatic moment, achieve the decoupling zero that radial translation controls to control radial direction twisting, improve gyrostatic moment precision.In addition, the magnetic moment of energization excitation coil is P=I × S (I is field coil electric current, and S is field coil area), and direction meets right-hand[ed.Because electrical current in field coil is paired Opposite side loading, so the residual magnetic moment equal and opposite in direction of two of often pair of coil field coils, direction is contrary, and external conjunction magnetic moment is zero.For soft magnetic material, its magnetic circuit is for being axially uniformly distributed, so its magnetic moment externally showed also is zero.For permanent magnet, its magnetic moment size is P=Hc × V (Hc is the coercivity of permanent magnet, and V is the volume of permanent magnet), and direction is the magnetizing direction of permanent magnet.For single permanent magnet outer rotor radial direction magnetic bearing, its remanence direction is permanent magnet magnetizing direction, and the axial magnetic moment component that externally performance one is larger, size is directly proportional to the volume of permanent magnet.Produced axial magnetic moment by compensating radial direction magnetic bearing, it is equal that the utility model all adds volume in magnetic bearing stators and rotators, and the permanent magnet that magnetizing direction is contrary, realizes the compensation of residual magnetic moment.
The utility model advantage is compared with prior art:
The utility model is on the basis of existing external rotor radial magnetic bearing, change existing magnetic bearing magnetic pole strength into sphere, the electromagnetic force that magnetic bearing rotor is subject at each magnetic pole place is all the time through the centre of sphere of spheric rotor sphere magnetic pole unshakable in one's determination, overcome because of each magnetic pole place electromagnetic force unequal time, and the radial direction twisting disturbance torque produced, improve the precision of the universal momenttum wheel gyrostatic moment of magnetic suspension.Adopt dual permanent-magnet structure simultaneously, all place volume at magnetic bearing stators and rotators equal, the permanent magnet that magnetizing direction is contrary, do not increase magnetic bearing volume, reduce the residual magnetic moment that radial direction magnetic bearing produces.
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, primarily of stator system and rotor-support-foundation system two-part composition, it is characterized in that: stator system mainly comprises: magnetic guiding loop 5, stator lower magnetic guiding loop 6, stator permanent magnet 7, stator sleeve 8 and stator lock ring 9 on sphere iron core 1, stator lower peripheral surface iron core 2, field coil 3, stator magnetism resistent ring 4, stator on stator, rotor-support-foundation system mainly comprises: magnetic guiding loop 13, rotor lower magnetic guiding loop 14, rotor permanent magnet 15, rotor sleeve 16 and rotor lock ring 17 on sphere iron core 10, rotor lower peripheral surface iron core 11, rotor magnetism-isolating loop 12, rotor on rotor, sphere 1 composition unshakable in one's determination 4 magnetic poles on stator, stator lower peripheral surface 2 compositions unshakable in one's determination 4 magnetic poles, sphere unshakable in one's determination 1 and stator lower peripheral surface 2 composition magnetic bearing 8, upper and lower two ends magnetic poles unshakable in one's determination on stator, form X respectively, the sphere magnetic pole of the positive negative direction of Y-axis, each magnetic pole of the stator is wound with field coil 3, between stator magnetism resistent ring 4 sphere on stator unshakable in one's determination 1 and stator lower peripheral surface iron core 2, on stator, magnetic guiding loop 5 is positioned at 1 radially inner side unshakable in one's determination of sphere on stator, stator lower magnetic guiding loop 6 is positioned at stator lower peripheral surface 2 radially inner sides unshakable in one's determination, stator permanent magnet 7 is on stator between magnetic guiding loop 5 and stator lower magnetic guiding loop 6, sphere iron core 1 on stator, stator lower peripheral surface iron core 2, stator magnetism resistent ring 4, magnetic guiding loop 5 on stator, stator lower magnetic guiding loop 6 and stator permanent magnet 7 are positioned at stator sleeve 8 radial outside, and be fixedly mounted on stator sleeve 8 by stator lock ring 9, on rotor, sphere iron core 10 is positioned at 1 radial outside unshakable in one's determination of sphere on stator, on rotor, sphere 10 inner ball surface unshakable in one's determination leave certain gap with sphere iron core 1 outer spherical surface on stator, 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 inner ball surface unshakable in one's determination and stator lower peripheral surface 2 outer spherical surfaces unshakable in one's determination leave certain gap, form air gap 18, between rotor magnetism-isolating loop 12 sphere on rotor unshakable in one's determination 10 and rotor lower peripheral surface iron core 11, on rotor, magnetic guiding loop 13 is positioned at 10 radial outsides unshakable in one's determination of sphere on rotor, rotor lower magnetic guiding loop 14 is positioned at rotor lower peripheral surface 11 radial outsides unshakable in one's determination, rotor permanent magnet 15 is on rotor between magnetic guiding loop 13 and rotor lower magnetic guiding loop 14, sphere iron core 10 on rotor, rotor lower peripheral surface iron core 11, rotor magnetism-isolating loop 12, magnetic guiding loop 13 on rotor, 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 utility model, Fig. 3 b is sphere unshakable in one's determination 1 and stator lower peripheral surface 2 three-dimensional structure schematic diagram unshakable in one's determination on stator in the utility model, its material is that the stalloy that magnetic property is good forms as the magnetic material punching presses such as Electrical Steel Sheet 1J22,1J50,1J79,1J85, electrical pure iron fold, four magnetic pole strengths are on same sphere, and each magnetic pole all adopts pole shoe form to reduce 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 the utility model rotor, Fig. 4 b is sphere unshakable in one's determination 10 and rotor lower peripheral surface 11 three-dimensional structure schematic diagram unshakable in one's determination on the utility model rotor, its material is that stalloy that magnetic property is good is as Electrical Steel Sheet 1J22, 1J50, 1J79, 1J85, the magnetic material punching presses such as electrical pure iron fold and form, when the universal momenttum wheel rotor of magnetic suspension is in equilibrium position, on rotor, the inner ball surface centre of sphere of sphere iron core 10 and the inner ball surface centre of sphere of rotor lower peripheral surface iron core 11 overlap with the centre of sphere of the centre of sphere of 1 outer spherical surface unshakable in one's determination of sphere on stator and the outer spherical surface of stator lower peripheral surface iron core 2.
The material of the stator magnetism resistent ring 4 that above-mentioned model utility scheme is used and rotor magnetism-isolating loop 12 is the non-magnetic alloys such as the good duralumin 2A12 of heat-conducting property, superduralumin 7A09.On stator, on magnetic guiding loop 5, stator lower magnetic guiding loop 6, rotor, magnetic guiding loop 13 and rotor lower magnetic guiding loop 14 are the good 1J85 permeability magnetic material of magnetic property.The material of stator permanent magnet 7 and rotor permanent magnet 15 is the good shirt cobalt alloy of magnetic property or Nd Fe B alloys, and the volume equal and opposite in direction of stator permanent magnet 7 and rotor permanent magnet 15, be axial circular ring structure, magnetize vertically, and magnetizing direction is contrary.Field coil 3 paint-dipping drying after the good copper wire winding of conduction forms.Stator sleeve 8 and rotor sleeve 16 material are the weak magnetic stainless steel of the good 1Cr18Ni9Ti of thermal conductivity ability.Stator lock ring 9 and rotor lock ring 17 material are the non-magnetic alloys such as the good duralumin 2A12 of heat-conducting property, superduralumin 7A09.
The content be not described in detail in the utility model specification belongs to the known prior art of professional and technical personnel in the field.
The above; be only the utility model preferably embodiment; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (8)
1. a dual permanent-magnet external rotor permanent magnet biases ball face radial direction magnetic bearing, comprises stator system and rotor-support-foundation system two-part, it is characterized in that:
Described stator system mainly comprises: magnetic guiding loop (5), stator lower magnetic guiding loop (6), stator permanent magnet (7), stator sleeve (8) and stator lock ring (9) on sphere iron core (1), stator lower peripheral surface iron core (2), field coil (3), stator magnetism resistent ring (4), stator on stator;
Described rotor-support-foundation system mainly comprises: magnetic guiding loop (13), rotor lower magnetic guiding loop (14), rotor permanent magnet (15), rotor sleeve (16) and rotor lock ring (17) on sphere iron core (10), rotor lower peripheral surface iron core (11), rotor magnetism-isolating loop (12), rotor on rotor;
Sphere iron core (1) composition 4 magnetic poles on described stator, described stator lower peripheral surface iron core (2) composition 4 magnetic poles, form magnetic bearing 8, upper and lower two ends magnetic pole of the stator altogether, form X respectively, the magnetic pole of the stator of the positive negative direction of Y-axis, each magnetic pole of the stator is wound with described field coil (3), described stator magnetism resistent ring (4) to be positioned on described stator between sphere iron core (1) and described stator lower peripheral surface iron core (2), on described stator, magnetic guiding loop (5) is positioned at sphere iron core (1) radially inner side on described stator, described stator lower magnetic guiding loop (6) is positioned at described stator lower peripheral surface iron core (2) radially inner side, described stator permanent magnet (7) to be positioned on described stator between magnetic guiding loop (5) and described stator lower magnetic guiding loop (6), sphere iron core (1) on described stator, described stator lower peripheral surface iron core (2), described stator magnetism resistent ring (4), magnetic guiding loop (5) on described stator, described stator lower magnetic guiding loop (6) and described stator permanent magnet (7) are positioned at described stator sleeve (8) radial outside, and be fixedly mounted on described stator sleeve (8) by described stator lock ring (9),
On described rotor, sphere iron core (10) is positioned at sphere iron core (1) radial outside on described stator, on described rotor, on sphere iron core (10) inner ball surface and described stator, sphere iron core (1) outer spherical surface leaves gap, form air gap (18), described rotor lower peripheral surface iron core (11) is positioned at described stator lower peripheral surface iron core (2) radial outside, described rotor lower peripheral surface iron core (11) inner ball surface and described stator lower peripheral surface iron core (2) outer spherical surface leave gap, form air gap (18);
Described rotor magnetism-isolating loop (12) to be positioned on described rotor between sphere iron core (10) and described rotor lower peripheral surface iron core (11), on described rotor, magnetic guiding loop (13) is positioned at sphere iron core (10) radial outside on described rotor, described rotor lower magnetic guiding loop (14) is positioned at described rotor lower peripheral surface iron core (11) radial outside, described rotor permanent magnet (15) to be positioned on described rotor between magnetic guiding loop (13) and described rotor lower magnetic guiding loop (14), sphere iron core (10) on described rotor, described rotor lower peripheral surface iron core (11), described rotor magnetism-isolating loop (12), magnetic guiding loop (13) on described rotor, described rotor lower magnetic guiding loop (14) and described rotor permanent magnet (15) are positioned at described rotor sleeve (16) radially inner side, and be fixedly mounted on described rotor sleeve (16) by described rotor lock ring (17).
2. dual permanent-magnet external rotor permanent magnet biases ball face according to claim 1 radial direction magnetic bearing, is characterized in that: on described stator, the magnetic pole of sphere iron core (1) and described stator lower peripheral surface iron core (2) all adopts pole shoe structure.
3. dual permanent-magnet external rotor permanent magnet biases ball face according to claim 1 radial direction magnetic bearing, it is characterized in that: on described stator, the magnetic pole spherical radius of sphere iron core (1) is equal with the magnetic pole spherical radius of described stator lower peripheral surface iron core (2), and both centre ofs sphere overlap completely.
4. dual permanent-magnet external rotor permanent magnet biases ball face according to claim 1 radial direction magnetic bearing, it is characterized in that: on described rotor, the magnetic pole spherical radius of sphere iron core (10) is equal with the magnetic pole spherical radius of described rotor lower peripheral surface iron core (11), and both centre ofs sphere overlap completely.
5. dual permanent-magnet external rotor permanent magnet biases ball face according to claim 1 radial direction magnetic bearing, is characterized in that: on described stator, on magnetic guiding loop (5), described stator lower magnetic guiding loop (6), described rotor, magnetic guiding loop (13) and described rotor lower magnetic guiding loop (14) are 1J85,1J50 or electrical pure iron permeability magnetic material.
6. dual permanent-magnet external rotor permanent magnet biases ball face according to claim 1 radial direction magnetic bearing, is characterized in that: described stator permanent magnet (7) and described rotor permanent magnet (15) are shirt cobalt alloy or Nd Fe B alloys material.
7. dual permanent-magnet external rotor permanent magnet biases ball face according to claim 1 radial direction magnetic bearing, is characterized in that: described stator permanent magnet (7) and described rotor permanent magnet (15) are axial annulus, magnetize vertically.
8. dual permanent-magnet external rotor permanent magnet biases ball face according to claim 1 radial direction magnetic bearing, is characterized in that: described stator permanent magnet (7) is equal with the volume of described rotor permanent magnet (15), and magnetizing direction is contrary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420686090.XU CN204267530U (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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| Application Number | Priority Date | Filing Date | Title |
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| CN201420686090.XU CN204267530U (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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| CN204267530U true CN204267530U (en) | 2015-04-15 |
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| CN201420686090.XU Withdrawn - After Issue CN204267530U (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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389903A (en) * | 2014-11-15 | 2015-03-04 | 北京石油化工学院 | Double-permanent magnet outer rotor permanent magnet-biased spherical radial magnetic bearing |
| CN107255118A (en) * | 2017-07-26 | 2017-10-17 | 珠海格力节能环保制冷技术研究中心有限公司 | The rotor of magnetic suspension bearing and its assembly tooling and assembly method |
-
2014
- 2014-11-15 CN CN201420686090.XU patent/CN204267530U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389903A (en) * | 2014-11-15 | 2015-03-04 | 北京石油化工学院 | Double-permanent magnet outer rotor permanent magnet-biased spherical radial magnetic bearing |
| CN107255118A (en) * | 2017-07-26 | 2017-10-17 | 珠海格力节能环保制冷技术研究中心有限公司 | The rotor of magnetic suspension bearing and its assembly tooling and assembly method |
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