CN105156475B - A kind of rotation modulation radial spherical permanent magnet biased magnetic bearing - Google Patents
A kind of rotation modulation radial spherical permanent magnet biased magnetic bearing Download PDFInfo
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- CN105156475B CN105156475B CN201510580585.3A CN201510580585A CN105156475B CN 105156475 B CN105156475 B CN 105156475B CN 201510580585 A CN201510580585 A CN 201510580585A CN 105156475 B CN105156475 B CN 105156475B
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Abstract
A kind of rotation modulation radial spherical permanent magnet biased magnetic bearing is mainly made of stator system, rotor-support-foundation system and rotation modulation system three parts, and stator system includes mainly：Upper spherical surface stator core, lower peripheral surface stator core, magnetizing coil, magnetism-isolating loop, upper magnetic guiding loop, lower magnetic guiding loop, permanent magnet, stator sleeve and stator locknut；Rotor-support-foundation system includes mainly：Spheric rotor iron core, rotor sleeve and rotor locknut；Rotation modulation system includes mainly：The mounting disc of magnetic bearing stator, rotation modulation armature spindle bearing sleeve, rotation modulation bearing, rotation modulation rotor locknut, supersonic motor rotor, supersonic motor stator, rotation modulation stator bearing holder (housing, cover) and rotation modulation stator locknut.The present invention has the function of rotation modulation, drives stator to be rotated by supersonic motor, the error of rotor angular speed caused by gyroscopic drift is eliminated, to improve the control accuracy of magnetic bearing.
Description
Technical field
The present invention relates to a kind of non-contact radial magnetic bearing, especially a kind of radial translation can be solved with radial twisting
Coupling controls and the permanent magnet bias spherical surface magnetic bearing with rotation modulation function, the nothing that can be used as rotary part in spacecraft connect
Support is touched, especially suitable for the non-contact bearing of magnetically suspended gyroscope, the radial translation of rotor can be realized and radially twist
Decoupling control improves the pointing accuracy of magnetically suspended gyroscope.
Technical background
With the continuous development of China's aerospace industry, the requirement to the gesture stability of the spacecrafts such as satellite, space station is more next
It is higher, there is active demand to research high-precision, the attitude coutrol mechanism of long-life.Magnetically suspended gyroscope be with long lifespan,
Control accuracy is high, vibrates the inertia actuator of small good characteristic, and the height of pointing accuracy is limited to gyro wheel
Radial translation control controls whether there is interference to radial twisting.Magnetically suspended gyroscope is supported using magnetic suspension bearing, energy
The pointing accuracy for enough improving gyroscope, to improve the control accuracy and stability of spacecraft attitude.
Magnetic suspension bearing is divided into pure electromagnetism magnetic bearing and permanent magnet biased hybrid magnetic bearing, and pure electromagnetism magnetic bearing utilizes coil electricity
The raw bias magnetic field of miscarriage, power consumption are bigger.Permanent magnet biased magnetic bearing generates bias magnetic field using permanent magnet and undertakes main hold
Power is carried, carries out auxiliary adjustment using coil electromagnetism magnetic field, power consumption is smaller.In order to reduce the power attenuation of magnetic bearing, coil is reduced
The number of turns reduces the volume of magnetic suspension bearing, in the field of the high-speed motions such as magnetic suspension control torque gyroscope, magnetic suspension bias momentum wheel
Permanent magnet biased magnetic bearing is selected as unification.Magnetically suspended gyroscope is supported high-speed rotating gyroscope using magnetic suspension bearing and turned
Son will realize magnetically suspended gyroscope rotor radial, the axial decoupling control for being translatable and radially twisting, must be requested that magnetic suspension bearing
The radially, axially electromagnetic force generated will not generate torsional moment to magnetically suspended gyroscope rotor.200510011530.7 He of patent
200710065049.5 a kind of permanent magnet biased internal rotor radial magnetic bearing, magnetic pole strength are cylindrical surface.Work as magnetic bearing
When rotor deflects, the non-uniform air-gap between magnetic bearing magnetic pole of the stator Internal Spherical Surface and rotor core spherical outside surface leads to stator
The electromagnetic force size of pole pair rotor is unequal, and direction generates and forwarded to magnetic axis not by magnetic bearing rotor centroid
The radial twisting disturbance torque of son, causes gyro wheel to deviate home position, that is, generates gyroscopic drift, gyroscope is caused to be directed toward
Precision reduces.If realizing detection function of the gyroscope as sensing unit, this disturbance torque can cause its detection part smart
Degree reduces.
Invention content
The technology of the present invention solves the problems, such as：A kind of elimination radially translation control is overcome the deficiencies of the prior art and provide
To the radial interference for twisting control and with the radial spherical permanent magnet biased magnetic bearing of rotation modulation function.
Technical solution of the invention is：A kind of rotation modulation radial spherical permanent magnet biased magnetic bearing, mainly by determining, turning
Subsystem and rotation modulation system composition, it is characterised in that：Include mainly：Four upper spherical surface stator cores (1), four lower peripheral surfaces
Stator core (2), magnetizing coil (3), magnetism-isolating loop (4), upper magnetic guiding loop (5), lower magnetic guiding loop (6), permanent magnet (7), stator locknut
(8), stator sleeve (9), spheric rotor iron core (10), rotor locknut (11), rotor sleeve (12), air gap (13), magnetic bearing are fixed
Sub- mounting disc (14), rotation modulation bearing (16), rotation modulation rotor locknut (17), surpasses rotation modulation armature spindle bearing sleeve (15)
Sound wave rotor (18), supersonic motor stator (19), rotation modulation stator bearing holder (housing, cover) (20) and rotation modulation stator locknut
(21)；There are two magnetizing coils (3) to form 4 magnetic poles, four lower peripheral surface stator iron for coiling for four upper spherical surface stator cores (1)
There are two magnetizing coils (3) to form 4 magnetic poles for core (2) coiling, and magnetic bearing stator upper and lower ends magnetic pole collectively constitutes rotation and adjusts
8 magnetic poles of radial spherical permanent magnet biased magnetic bearing ± X processed, ± Y direction, magnetism-isolating loop (4) are located at four upper spherical surface stator iron
The upper axial end of the lower axial end of core (1) and four lower peripheral surface stator cores (2), it is fixed that upper magnetic guiding loop (5) is located at four upper spherical surfaces
The radial outside of sub- iron core (1), lower magnetic guiding loop (6) are located at the radial outside of four lower peripheral surface stator cores (2), permanent magnet (7)
Positioned at the upper axial end of the lower axial end and lower magnetic guiding loop (6) of upper magnetic guiding loop (5), four upper spherical surface stator cores (1), under four
Spherical surface stator core (2), magnetism-isolating loop (4), upper magnetic guiding loop (5), lower magnetic guiding loop (6) and permanent magnet (7) are solid by stator locknut (8)
Dingan County is mounted in stator sleeve (9) radially inner side, and spheric rotor iron core (10) is located under four upper spherical surface stator cores (1) and four
The radially inner side of spherical surface stator core (2) and the radial outside of rotor sleeve (12), and pacify by the way that rotor locknut (11) is fixed
On rotor sleeve (12), the Internal Spherical Surface and spherical surface of four upper spherical surface stator cores (1) and four lower peripheral surface stator cores (2)
There are certain spherical shell gaps between the spherical outside surface of rotor core (10), form air gap (13), magnetic bearing stator mounting disc (14)
Positioned at magnetic bearing stator sleeve (9) upper axial end and be fixedly connected on magnetic bearing stator sleeve (9) by screw, rotation adjust
Armature spindle bearing sleeve (15) processed is located at the mounting disc of magnetic bearing stator (14) upper axial end, and is pacified by interference fit and magnetic bearing stator
Sabot (14) connects, and rotation modulation bearing (16) is located at rotation modulation armature spindle bearing sleeve (15) radial outside, and is adjusted by rotating
The inner ring of rotation modulation bearing (16) is axially fixed on rotation modulation armature spindle bearing sleeve (15) by rotor locknut (17) processed, ultrasound
Wave rotor (18) is fixedly connected on the upper axial end of magnetic bearing stator mounting disc (14), and supersonic motor stator (19) passes through
Pressure is fixed on the upper axial end of supersonic motor rotor (18), and rotation modulation stator bearing holder (housing, cover) (20) is fixed positioned at supersonic motor
Sub (19) radially inner side, and be interference fitted and connect with supersonic motor stator (19), rotation modulation stator locknut (21) will rotate
Modulation bearing (16) outer ring is axially fixed on rotation modulation stator bearing holder (housing, cover) (20).
The field structure of the upper spherical surface stator core (1) is divided into front, middle part and root, upper spherical surface stator core
(1) it is 82 ° that front left edge forms angle with upper spherical surface stator core (1) front right side edge, circumferentially upper two to be connected
Distance is 4mm between a spherical surface stator core magnetic pole, and the left side edge of upper spherical surface stator core (1) magnetic pole front is connect with middle part
It is 131 ° that place, which forms angle, and it is 117 ° that angle is formed between the plane of two, middle part, and middle part and root circular arc tangential line angle are 112 °；
Similarly, it is 131 ° that the right side edge of upper spherical surface stator core (1) magnetic pole front forms angle with middle part junction, and two, middle part is flat
It is 117 ° that angle is formed between face, and middle part is 112 ° with root circular arc tangential line angle, and four are gone up spherical surface stator cores (1) and four
Stator core (2) appearance and size is identical under spherical surface.
Described each magnetizing coil (3) the number of turns is 80~120 circles.
The spherical radius of the spheric rotor iron core (10) takes 21mm~51mm, spheric rotor iron core (10) left spherical surface pair
The centre of sphere angle answered is 58 °, arc edge tangent line and spheric rotor iron core (10) upper end on the upside of the left spherical surface of spheric rotor iron core (10)
Left side of face edge angle is 120 °, arc edge tangent line and spheric rotor iron core on the downside of the left spherical surface of spheric rotor iron core (10)
(10) left side edge angle in lower face is 120 °；Similarly, the corresponding centre of sphere angle of spheric rotor iron core (10) right spherical surface is
58 °, arc edge tangent line and spheric rotor iron core (10) upper surface right side edge institute on the upside of the right spherical surface of spheric rotor iron core (10)
It it is 120 ° at angle, arc edge tangent line and spheric rotor iron core (10) lower face are right on the downside of the right spherical surface of spheric rotor iron core (10)
Lateral edges angle is 120 °.
Upper spherical surface stator core (1), lower peripheral surface stator core (2) and the spheric rotor iron core (10) be 1J50 or
The solid bulk of the magnetic conductions such as 1J85.The permanent magnet (7) is shirt cobalt alloy or Nd Fe B alloys material, and permanent magnet (7) is in an axial direction
It magnetizes.Described air gap (13) size is 1mm~1.7mm.
The principle of the present invention is：Important mechanism of the present invention is the rotation modulation to magnetic bearing stator, that is, passes through ultrasonic wave electricity
Machine carries out Periodic Rotating to magnetic bearing stator, makes its sensitive axes cyclically-varying, and by measured signal, (angular speed of rotor is believed
Number) be modulated on swing circle carrier wave, since gyroscopic drift error is not with rotation carrier cycle variation, by the radial direction magnetic axis
When holding the angular rate information for sensitive rotor, so that it may be eliminated caused by gyroscopic drift introducing with being filtered by demodulation
The error of rotor angular rate information, therefore the innovation of the invention consists in that the stator of magnetic bearing rotates, wherein realizing stator rotation
Mechanism includes mainly：Magnetic bearing stator mounting disc (14), rotation modulation armature spindle bearing sleeve (15), rotation modulation bearing (16), rotation
Modulation rotor locknut (17), supersonic motor rotor (18), supersonic motor stator (19), rotation modulation stator bearing holder (housing, cover)
(20) and rotation modulation stator locknut (21)；Magnetic bearing stator mounting disc (14) is located in the axial direction of magnetic bearing stator sleeve (9)
It holds and is fixedly connected on magnetic bearing stator sleeve (9) by screw, rotation modulation armature spindle bearing sleeve (15) is fixed positioned at magnetic bearing
Sub- mounting disc (14) upper axial end, and connect with magnetic bearing stator mounting disc (14) by being interference fitted, rotation modulation bearing
(16) it is located at rotation modulation armature spindle bearing sleeve (15) radial outside, and by rotation modulation rotor locknut (17) by rotation modulation axis
The inner ring for holding (16) is axially fixed on rotation modulation armature spindle bearing sleeve (15), and supersonic motor rotor (18) is fixedly connected on magnetic
The upper axial end of bearing stator mounting disc (14), supersonic motor stator (19) are fixed on supersonic motor rotor by pressure
(18) upper axial end, rotation modulation stator bearing holder (housing, cover) (20) are located at supersonic motor stator (19) radially inner side, and with ultrasound
Wave motor stator (19) interference fit connection, rotation modulation stator locknut (21) is by rotation modulation bearing (16) outer ring axial restraint
On rotation modulation stator bearing holder (housing, cover) (20).
Permanent magnet provides permanent magnet bias magnetic field for magnetic bearing, undertakes the main radial bearing capacity of magnetic bearing, magnetizing coil institute
The positive desuperposition of bias magnetic field that the magnetic field of generation is generated as auxiliary adjustment magnetic field and permanent magnet, makes magnetic bearing stator spherical surface magnetic pole
Air gap between rotor spherical surface magnetic pole keeps uniform, realizes the contactless suspension bearing of rotor.It is forever that the present invention, which biases magnetic circuit,
Magnetic magnetic circuit, by taking magnetic bearing-Y direction as an example, as shown in Figure 1：Magnetic flux from permanent magnet (7) N grades, by upper magnetic guiding loop (5),
Upper spherical surface stator core (1), air gap (13), spheric rotor iron core (10), air gap (13), lower peripheral surface stator core (2), lower magnetic conduction
Ring (6) returns to S grades of permanent magnet (7).Magnetizing coil electric current generates auxiliary adjustment magnetic circuit, with the upper spherical surface magnetic pole of the stator of+Y direction
For magnetic circuit, as shown in Figure 2：From the upper spherical surface stator core of+Y direction, (1) turned magnetic flux by air gap (13), spherical surface
Sub- iron core (10), air gap (13) and then respectively to spherical surface stator on the upper spherical surface stator core (1) of+X-direction and-X-direction
Iron core (1) returns to+upper spherical surface stator core (1) of Y direction by upper magnetic guiding loop (5) again, constitutes closed circuit.
The magnetizing coil of upper and lower spherical surface stator core uses two coil configuration, and two coil turns are identical, and a coil is solid
Surely it is passed through controllable current, generates auxiliary adjustment magnetic field, another coil can be passed through constant current, generate bias magnetic field, and forever
The bias magnetic field that magnet generates carries out positive desuperposition, realizes the adjustable of bias magnetic field, to widen the loading range of magnetic bearing,
So that magnetic bearing is can be used in more multi-load case, controllable current can also be passed through, generates auxiliary adjustment magnetic field, at this time controllable coil
There are two, the number of turns of each controllable coil is few, therefore inductance is small, is greatly improved current-responsive rate.
In addition upper spherical surface stator core (1), lower peripheral surface stator core (2) and spheric rotor iron core (10) of the invention are adopted
With spherical structure, the electromagnetic force that 8 spherical surface stator core magnetic poles suffered by rotor generate is made to pass through the centre of sphere always, when the rotor centre of sphere with
When barycenter overlaps, the electromagnetic force that 8 spherical surface stator core magnetic poles generate is zero to the torque of rotor, to eliminate radial translation
The interference to radial translation control is controlled, the gyroscopic drift caused by magnetic bearing is eliminated.In addition, stator core uses pole shoe knot
Structure makes magnetic field be distributed uniformly and circumferentially, and further improves the control accuracy of magnetic bearing.
Compared with existing scheme, major advantage is the solution of the present invention：(1) magnetic bearing of the present invention uses spherical surface magnetic
Pole eliminates interference of the radial translation to radially twisting compared with the magnetic bearing of existing cylinder magnetic pole；(2) magnetic bearing of the present invention
Spherical surface stator core uses pole shoe structure, and magnetic field is made to be distributed uniformly and circumferentially；(3) magnetizing coil uses two-wire loop knot
Structure, one of coil, which is fixed, provides auxiliary adjustment magnetic field, another coil can both provide bias magnetic field, can also provide tune
Magnetic field is saved, the loading range of magnetic bearing is improved；(4) have the function of rotation modulation, driving magnetic bearing is carried out by ultrasound electric machine
Stator realizes the rotation of magnetic bearing stator, can eliminate the gyroscopic drift that gyrorotor rotation introduces, improve magnetic suspension top
The pointing accuracy of spiral shell instrument.
Description of the drawings
Fig. 1 is a kind of rotation modulation radial spherical permanent magnet biased magnetic bearing axial direction section view of the technology of the present invention solution
Figure；
Fig. 2 is the stator and rotor system upper surface figure of the technology of the present invention solution；
Fig. 3 is the spherical surface stator core upper surface figure of the technology of the present invention solution；
Fig. 4 is the spheric rotor iron core axial sectional view of the technology of the present invention solution；
Fig. 5 is that a kind of rotation modulation radial spherical permanent magnet biased magnetic bearing three-dimensional structure of the technology of the present invention solution is shown
It is intended to.
Specific embodiment
As shown in Figure 1, 2, a kind of rotation modulation radial spherical permanent magnet biased magnetic bearing, mainly by stator and rotor system and rotation
Turn modulating system composition, includes mainly：Four upper spherical surface stator cores (1), four lower peripheral surface stator cores (2), magnetizing coils
(3), magnetism-isolating loop (4), upper magnetic guiding loop (5), lower magnetic guiding loop (6), permanent magnet (7), stator locknut (8), stator sleeve (9), spherical surface
Rotor core (10), rotor locknut (11), rotor sleeve (12), air gap (13), magnetic bearing stator mounting disc (14), rotation modulation
Armature spindle bearing sleeve (15), rotation modulation bearing (16), rotation modulation rotor locknut (17), supersonic motor rotor (18), ultrasound
Wave motor stator (19), rotation modulation stator bearing holder (housing, cover) (20) and rotation modulation stator locknut (21)；Four upper spherical surface stator iron
There are two magnetizing coils (3) to form 4 magnetic poles for core (1) coiling, and there are two excitatory for the coiling of four lower peripheral surface stator cores (2)
Coil (3) forms 4 magnetic poles, and magnetic bearing stator upper and lower ends magnetic pole collectively constitutes rotation modulation radial spherical permanent magnet bias magnetic axis
Hold ± X, ± Y direction 8 magnetic poles, magnetism-isolating loop (4) is located under the lower axial end and four of four upper spherical surface stator cores (1)
The upper axial end of spherical surface stator core (2), upper magnetic guiding loop (5) are located at the radial outsides of four upper spherical surface stator cores (1), under lead
Magnet ring (6) is located at the radial outside of four lower peripheral surface stator cores (2), and permanent magnet (7) is located at the lower axial end of upper magnetic guiding loop (5)
With the upper axial end of lower magnetic guiding loop (6), four upper spherical surface stator cores (1), four lower peripheral surface stator cores (2), magnetism-isolating loops
(4), upper magnetic guiding loop (5), lower magnetic guiding loop (6) and permanent magnet (7) are fixedly mounted on stator sleeve (9) diameter by stator locknut (8)
Inwardly, spheric rotor iron core (10) is located at the radial direction of four upper spherical surface stator cores (1) and four lower peripheral surface stator cores (2)
The radial outside of inside and rotor sleeve (12), and be fixedly mounted on rotor sleeve (12) by rotor locknut (11), four
The spherical outside surface of the Internal Spherical Surface and spheric rotor iron core (10) of a upper spherical surface stator core (1) and four lower peripheral surface stator cores (2)
Between there are certain spherical shell gap, form air gap (13), magnetic bearing stator mounting disc (14) is located at magnetic bearing stator sleeve (9)
Upper axial end and be fixedly connected on magnetic bearing stator sleeve (9) by screw, rotation modulation armature spindle bearing sleeve (15) is located at
The mounting disc of magnetic bearing stator (14) upper axial end, and connect with magnetic bearing stator mounting disc (14) by being interference fitted, rotation is adjusted
Bearing (16) processed is located at rotation modulation armature spindle bearing sleeve (15) radial outside, and will be rotated by rotation modulation rotor locknut (17)
The inner ring of modulation bearing (16) is axially fixed on rotation modulation armature spindle bearing sleeve (15), and supersonic motor rotor (18) is fixed to be connected
It is connected on the upper axial end of magnetic bearing stator mounting disc (14), supersonic motor stator (19) is fixed on supersonic motor by pressure
The upper axial end of rotor (18), rotation modulation stator bearing holder (housing, cover) (20) are located at supersonic motor stator (19) radially inner side, and with
Supersonic motor stator (19) interference fit connection, rotation modulation stator locknut (21) are axial by rotation modulation bearing (16) outer ring
It is fixed on rotation modulation stator bearing holder (housing, cover) (20).Described spherical shell air gap (13) size is 1mm~1.7mm.
Fig. 3 is spherical surface stator core upper surface figure, the field structure of upper spherical surface stator core (1) be divided into front, middle part and
Root, upper spherical surface stator core (1) front left edge form angle with upper spherical surface stator core (1) front right side edge and are
82 °, circumferentially distance is 4mm, upper spherical surface stator core (1) magnetic pole front between upper two connected spherical surface stator core magnetic poles
To form angle be 131 ° left side edge and middle part junction, it is 117 ° that angle is formed between the plane of two, middle part, middle part and root
Portion's circular arc tangential line angle is 112 °；Similarly, the right side edge of upper spherical surface stator core (1) magnetic pole front is formed with middle part junction
Angle is 131 °, and it is 117 ° that angle is formed between the plane of two, middle part, and middle part and root circular arc tangential line angle are on 112 °, four
Spherical surface stator core (1) is identical with stator core (2) appearance and size under four spherical surfaces.The all angles all pass through
What a large amount of emulation and experiment obtained makes air-gap field fluctuate in a circumferential direction minimum and avoids the generation of magnetic pole each section
The optimal corner angle value that flux density is concentrated.The spherical radius of upper spherical surface stator core (1) and lower peripheral surface stator core (2) take 22mm~
52mm, the spherical radius of upper spherical surface stator core (1) and lower peripheral surface stator core (2) takes 32mm in the present invention, and edge ± X,
The centre of sphere of each spherical surface stator core of ± Y direction placement is completely superposed.
Fig. 4 is spheric rotor iron core axial sectional view, and the spherical radius of spheric rotor iron core (10) takes 21mm~51mm,
The spherical radius of spheric rotor iron core (10) takes the 31mm, the corresponding centre of sphere angle of spheric rotor iron core (10) left spherical surface to be in this example
58 °, arc edge tangent line and spheric rotor iron core (10) upper surface left side edge institute on the upside of the left spherical surface of spheric rotor iron core (10)
It it is 120 ° at angle, arc edge tangent line and spheric rotor iron core (10) lower face are left on the downside of the left spherical surface of spheric rotor iron core (10)
Lateral edges angle is 120 °；Similarly, the corresponding centre of sphere angle of spheric rotor iron core (10) right spherical surface is 58 °, spheric rotor iron
Arc edge tangent line and spheric rotor iron core (10) upper surface right side edge angle are 120 ° on the upside of the right spherical surface of core (10), ball
Arc edge tangent line and spheric rotor iron core (10) lower face right side edge angle on the downside of the right spherical surface of face rotor core (10)
It is 120 °.
The content that description in the present invention is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (1)
1. a kind of rotation modulation radial spherical permanent magnet biased magnetic bearing, is mainly made of stator and rotor system and rotation modulation system,
It is characterized in that：Include mainly：Four upper spherical surface stator cores (1), four lower peripheral surface stator cores (2), magnetizing coil (3),
Magnetism-isolating loop (4), upper magnetic guiding loop (5), lower magnetic guiding loop (6), permanent magnet (7), stator locknut (8), stator sleeve (9), spheric rotor
Iron core (10), rotor locknut (11), rotor sleeve (12), air gap (13), magnetic bearing stator mounting disc (14), rotation modulation rotor
Bearing holder (housing, cover) (15), rotation modulation bearing (16), rotation modulation rotor locknut (17), supersonic motor rotor (18), ultrasonic wave electricity
Machine stator (19), rotation modulation stator bearing holder (housing, cover) (20) and rotation modulation stator locknut (21)；Four upper spherical surface stator cores (1)
There are two magnetizing coils (3) to form 4 magnetic poles for equal coiling, and there are two magnetizing coils for the coiling of four lower peripheral surface stator cores (2)
(3) form 4 magnetic poles, magnetic bearing stator upper and lower ends magnetic pole collectively constitute rotation modulation radial spherical permanent magnet biased magnetic bearing ±
X, 8 magnetic poles of ± Y direction, magnetism-isolating loop (4) are located at the lower axial end and four lower peripheral surfaces of four upper spherical surface stator cores (1)
The upper axial end of stator core (2), upper magnetic guiding loop (5) are located at the radial outside of four upper spherical surface stator cores (1), lower magnetic guiding loop
(6) it is located at the radial outside of four lower peripheral surface stator cores (2), permanent magnet (7) is located at the lower axial end of upper magnetic guiding loop (5) under
The upper axial end of magnetic guiding loop (6), four upper spherical surface stator cores (1), four lower peripheral surface stator cores (2), magnetism-isolating loop (4), on
Magnetic guiding loop (5), lower magnetic guiding loop (6) and permanent magnet (7) are fixedly mounted on stator sleeve (9) radially inner side by stator locknut (8),
Spheric rotor iron core (10) be located at the radially inner side of four upper spherical surface stator cores (1) and four lower peripheral surface stator cores (2) with
And the radial outside of rotor sleeve (12), and be fixedly mounted on rotor sleeve (12) by rotor locknut (11), four upper balls
It is stayed between face stator core (1) and the Internal Spherical Surface and the spherical outside surface of spheric rotor iron core (10) of four lower peripheral surface stator cores (2)
There is certain spherical shell gap, form air gap (13), magnetic bearing stator mounting disc (14) is located at the axial direction of magnetic bearing stator sleeve (9)
Upper end is simultaneously fixedly connected on by screw on magnetic bearing stator sleeve (9), and rotation modulation armature spindle bearing sleeve (15) is located at magnetic bearing
Stator mounting disc (14) upper axial end, and connect with magnetic bearing stator mounting disc (14) by being interference fitted, rotation modulation bearing
(16) it is located at rotation modulation armature spindle bearing sleeve (15) radial outside, and by rotation modulation rotor locknut (17) by rotation modulation axis
The inner ring for holding (16) is axially fixed on rotation modulation armature spindle bearing sleeve (15), and supersonic motor rotor (18) is fixedly connected on magnetic
The upper axial end of bearing stator mounting disc (14), supersonic motor stator (19) are fixed on supersonic motor rotor by pressure
(18) upper axial end, rotation modulation stator bearing holder (housing, cover) (20) are located at supersonic motor stator (19) radially inner side, and with ultrasound
Wave motor stator (19) interference fit connection, rotation modulation stator locknut (21) is by rotation modulation bearing (16) outer ring axial restraint
On rotation modulation stator bearing holder (housing, cover) (20)；
Wherein, described each magnetizing coil (3) the number of turns is 80~120 circles；
Wherein, the spherical radius of the spheric rotor iron core (10) takes 21mm~51mm, spheric rotor iron core (10) left spherical surface
Corresponding centre of sphere angle is 58 °, on the upside of the left spherical surface of spheric rotor iron core (10) on arc edge tangent line and spheric rotor iron core (10)
End face left side edge angle is 120 °, arc edge tangent line and spheric rotor iron on the downside of the left spherical surface of spheric rotor iron core (10)
Core (10) lower face left side edge angle is 120 °；Similarly, the corresponding centre of sphere angle of spheric rotor iron core (10) right spherical surface is
58 °, arc edge tangent line and spheric rotor iron core (10) upper surface right side edge institute on the upside of the right spherical surface of spheric rotor iron core (10)
It it is 120 ° at angle, arc edge tangent line and spheric rotor iron core (10) lower face are right on the downside of the right spherical surface of spheric rotor iron core (10)
Lateral edges angle is 120 °；
Wherein, upper spherical surface stator core (1), lower peripheral surface stator core (2) and the spheric rotor iron core (10) are 1J50
Or the solid bulk of 1J85 magnetic conductions, permanent magnet (7) they are shirt cobalt alloy or Nd Fe B alloys material, permanent magnet (7) magnetizes in an axial direction；
Wherein, the air gap (13) size is 1mm~1.7mm；The field structure of the upper spherical surface stator core (1) is divided into
Front, middle part and root, upper spherical surface stator core (1) front left edge and upper spherical surface stator core (1) front right side edge
It is 82 ° to form angle, and circumferentially distance is 4mm, upper spherical surface stator core between upper two connected spherical surface stator core magnetic poles
(1) it is 131 ° that the left side edge of magnetic pole front forms angle with middle part junction, forms angle between the plane of two, middle part and is
117 °, middle part and root circular arc tangential line angle are 112 °；Similarly, the right side edge of upper spherical surface stator core (1) magnetic pole front with
It is 131 ° that middle part junction, which forms angle, and it is 117 ° that angle is formed between the plane of two, middle part, and middle part is pressed from both sides with root circular arc tangential line
Angle is 112 °, and four upper spherical surface stator cores (1) are identical with stator core (2) appearance and size under four spherical surfaces.
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| CN111120510B (en) * | 2019-12-19 | 2021-04-09 | 北京哈尔贝克科技有限公司 | High-rigidity spherical Lorentz deflection bearing with auxiliary air gap |
| CN112366891A (en) * | 2020-11-06 | 2021-02-12 | 中国船舶重工集团公司第七0七研究所 | Motor structure for liquid floated gyroscope |
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| CN105156475A (en) | 2015-12-16 |
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