CN104948583B - A kind of twin coil axial direction pure electromagnetism magnetic bearing of sphere - Google Patents
A kind of twin coil axial direction pure electromagnetism magnetic bearing of sphere Download PDFInfo
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Abstract
A kind of twin coil axial direction pure electromagnetism magnetic bearing of sphere is mainly made up of stator system and rotating shaft two parts, and stator system mainly includes：Upper stator core, lower stator core, magnetizing coil.The present invention uses upper and lower sphere magnetic bearing, makes electromagnetic force suffered by rotating shaft all the time by the centre of sphere, and when the rotating shaft centre of sphere overlaps with barycenter, electromagnetic force is zero with respect to the moment of torsion that rotating shaft is produced, so as to eliminate radially interference of the twisting to axial translation.In addition, upper and lower stator core uses pole shoe structure, make the Distribution of Magnetic Field on circumference more uniform, the magnetizing coil of upper and lower stator core uses two coil configuration, and two coil turns are different, and the few coil current of the number of turn is controllable, the big coil current of the number of turn is constant, current-responsive speed is improve compared with single coil structure, controllable current uses differential form, further increase the control accuracy of magnetic bearing.
Description
Technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, particularly a kind of pure electromagnetism magnetic bearing of sphere can be used as small-sized
The contactless support of rotary part in spacecraft, is particularly well-suited to the noncontact supporting of magnetically levitated flywheel.
Technical background
With the development of space technology, the spacecraft such as satellite, space station for gesture stability required precision more and more higher,
Tradition machinery momenttum wheel can not meet requirement.Magnetically levitated flywheel is supported using magnetic bearing, eliminates what mechanical bearing brought
Abrasion, improves the precision and stability of control moment.
It is general to use single-degree-of-freedom axial magnetic bearing or Three Degree Of Freedom axial magnetic bearing in existing magnetically levitated flywheel structure.
No matter which kind of scheme is used, under conditions of bearing capacity is met, when rotor occurs translation, the air gap at magnetic bearing magnetic pole is more equal
It is even to produce torque with respect to rotating shaft.But when rotor deflects, the magnetic air gap between magnetic bearing stator and rotor is uneven,
Cause the electromagnetic force in magnetic pole strength uneven, so as to produce the torsional moment of relative rotor barycenter, i.e. translation control is controlled to twisting
System produces disturbance torque.Permanent-magnetic biased axial described in Chinese Patent Application No. 200510011272.2 and 200710098749.4
The magnetic pole strength of magnetic bearing is cylinder, when magnetic bearing deflects, there is non-uniform gap between stator and rotor, so as to produce larger
Torsion negative moment, increased the load of flywheel torsion bearing.So as to reduce the control accuracy and control moment of flywheel rotor
Precision.
The content of the invention
Technology solve problem of the invention is：Overcome the deficiencies in the prior art, there is provided one kind is eliminated radially to twist and done
The pure electromagnetism magnetic bearing of axial sphere disturbed.
Technical solution of the invention is：A kind of pure electromagnetism magnetic bearing of axial sphere, mainly by stator system and rotating shaft
Two parts are constituted, and stator system mainly includes：Under upper stator core, lower stator core, upper upper axial end magnetizing coil, upper axial direction
End magnetizing coil, lower lower axial end magnetizing coil and lower upper axial end magnetizing coil；Upper stator core includes the left magnetic pole of sphere, ball
Magnetic pole and the right magnetic pole of sphere in face, and the area of magnetic pole is more than the area sum of the left magnetic pole of sphere and the right magnetic pole of sphere in sphere,
The area of magnetic pole is 3 times of the area sum of the left magnetic pole of sphere and the right magnetic pole of sphere, upper stator core sphere preferably in sphere
The angle that left magnetic pole left side edge is formed with the right magnetic pole right side edge of upper stator core sphere is 87 °, and upper stator core sphere is left
Distance is 1.4mm, the upper right magnetic of stator core sphere between magnetic pole left side edge in magnetic pole right side edge and upper stator core sphere
Distance is 1.4mm, magnetic pole in upper stator core sphere between magnetic pole right side edge in ultra-Left lateral edges and upper stator core sphere
Circular conical surface is with the junction angulation of magnetic pole in the upper left magnetic pole of stator core sphere and upper stator core sphere on the left of root
86 °, magnetic pole root right side circular conical surface and magnetic pole in upper stator core sphere and upper stator core sphere in upper stator core sphere
The junction angulation of right magnetic pole is 86 °；Lower stator core includes magnetic pole and the right magnetic pole of sphere in the left magnetic pole of sphere, sphere,
The angle that the lower left magnetic pole left side edge of stator core sphere is formed with the right magnetic pole right side edge of lower stator core sphere is 87 °, under
Distance is 1.4mm between magnetic pole left side edge in the left magnetic pole right side edge of stator core sphere and lower stator core sphere, lower fixed
Distance is 1.4mm, lower stator between magnetic pole right side edge in the sub- right magnetic pole left side edge of iron core sphere and lower stator core sphere
The company of magnetic pole root left side circular conical surface and magnetic pole in the lower left magnetic pole of stator core sphere and lower stator core sphere in iron core sphere
Connect place and be angled 86 °, in lower stator core sphere magnetic pole root right side circular conical surface and magnetic pole in lower stator core sphere and
The junction angulation of the lower right magnetic pole of stator core sphere is 86 °, and the radially inner side of magnetic pole is from upper in upper stator core sphere
Upper axial end magnetizing coil and upper lower axial end magnetizing coil, the coil turn of upper upper axial end magnetizing coil in coiling successively under
Number is 100~200 circles, and the coil turn of upper lower axial end magnetizing coil is 20~50 circles, and upper stator core, upper upper axial end swash
Magnetic coil and upper lower axial end magnetizing coil collectively form sphere stator, in lower stator core sphere the radially inner side of magnetic pole from
Under be wound with lower lower axial end magnetizing coil and lower upper axial end magnetizing coil, the line of lower lower axial end magnetizing coil successively to upper
The circle number of turn is 80~160 circles, and the coil turn of lower upper axial end magnetizing coil is 15~40 circles, and lower stator core, lower axle are downward
End magnetizing coil and lower upper axial end magnetizing coil collectively form lower peripheral surface stator, and rotating shaft is located at upper stator core and lower stator iron
Between core, certain spherical shell gap is left between sphere and each magnetic pole sphere of upper stator core in rotating shaft, axial spherical shell gas in formation
Gap, leaves certain spherical shell gap between rotating shaft lower peripheral surface and each magnetic pole sphere of lower stator core, form lower axial direction spherical shell air gap.
The described left magnetic pole left side edge of upper stator core sphere and the left magnetic pole left arc edge of upper stator core sphere
Tangent line angle is 47 °, the upper left magnetic pole right side edge of stator core sphere and the left magnetic pole right circular arc of upper stator core sphere
Edge tangent line angle is 113 °, magnetic pole left side edge and magnetic pole left side in upper stator core sphere in upper stator core sphere
Arc edge tangent line angle is 71 °, magnetic pole right side edge and magnetic pole in upper stator core sphere in upper stator core sphere
Right circular arc edge tangent line angle is 71 °, and the upper right magnetic pole left side edge of stator core sphere is right with upper stator core sphere
Magnetic pole left arc edge tangent line angle is 113 °, the upper right magnetic pole right side edge of stator core sphere and upper stator core ball
The right magnetic pole right circular arc edge tangent line angle in face is 47 °, the lower left magnetic pole left side edge of stator core sphere and lower stator iron
The left magnetic pole left arc edge tangent line angle of core sphere is 47 °, and the lower left magnetic pole right side edge of stator core sphere is fixed with lower
The sub- left magnetic pole right circular arc edge tangent line angle of iron core sphere be 113 °, in lower stator core sphere magnetic pole left side edge with
Magnetic pole left arc edge tangent line angle is 71 °, magnetic pole right edge in lower stator core sphere in lower stator core sphere
Edge is 71 ° with magnetic pole right circular arc edge tangent line angle in lower stator core sphere, and the lower right magnetic pole of stator core sphere is left
Lateral edges are 113 °, the lower right magnetic of stator core sphere with the right magnetic pole left arc edge tangent line angle of lower stator core sphere
Ultra-Right lateral edges are 47 ° with the right magnetic pole right circular arc edge tangent line angle of lower stator core sphere.
Described upper stator core and lower stator core is 1J22 magnetic conduction bulk materials.
Described upper stator core and the spherical radius of lower stator core take 20mm~50mm, and upper stator core and lower fixed
The appearance and size of sub- iron core is essentially equal, installs the latter two centre ofs sphere and is completely superposed.
Described upper upper axial end magnetizing coil and the axial gap of upper lower axial end magnetizing coil are 0.5mm~0.8mm,
The axial gap of lower lower axial end magnetizing coil and lower upper axial end magnetizing coil is 0.5mm~0.8mm, to reduce two coils
The turn-to-turn leakage field produced after galvanization and mutual inductance.
The magnetizing coil of upper and lower stator core uses two coil configuration, and two coil turns are different, the few coil electricity of the number of turn
Stream is controllable, and the big coil current of the number of turn is constant, and the coil more than the number of turn is passed through constant current, and to produce bias magnetic field, the number of turn is few
Coil is passed through controllable current, and to produce regulation magnetic field, and coil inductance is smaller, improves the response speed of control.
The spherical radius of described rotating shaft takes 19mm~49mm, and the centre of sphere angle in rotating shaft corresponding to sphere is 84 °, in rotating shaft
Sphere left arc edge tangent line angle is 132 ° in sphere left side edge and rotating shaft, in rotating shaft sphere right side edge with turn
Sphere right circular arc edge tangent line angle is 132 ° on axle, and the centre of sphere angle corresponding to rotating shaft lower peripheral surface is 84 °, ball under rotating shaft
Left side of face edge and rotating shaft lower peripheral surface left arc edge tangent line angle are 132 °, rotating shaft lower peripheral surface right side edge and rotating shaft
Lower peripheral surface right circular arc edge tangent line angle is 132 °.
Described upper axial spherical shell air gap and lower axial spherical shell size of gaps are 0.5mm~0.7mm.
Principle of the invention is：The magnetic pole strength structure of upper stator core and lower stator core uses spherical structure, makes rotating shaft
All the time by the centre of sphere, when the rotating shaft centre of sphere overlaps with barycenter, electromagnetic force is zero with respect to the moment of torsion that rotating shaft is produced to suffered electromagnetic force, so that
Eliminate radially interference of the twisting to axial translation.Upper stator core and lower stator core use pole shoe structure, make magnetic field along circle
Circumferential direction has a preferable uniformity, and middle magnetic pole sphere area more than left magnetic pole and the area of spherical surface sum of right magnetic pole, make
The magnetic axis load disturbance torque of radial outside reduces, and further increases the control accuracy of magnetic bearing.Upper and lower stator core swash
Magnetic coil uses two coil configuration, and two coil turns are different, and the few coil current of the number of turn is controllable, produces regulation magnetic field, the number of turn
Many coil currents are constant, produce bias magnetic field, compared with single coil structure, because the number of turn of controllable coil is few, therefore inductance
It is small, current-responsive speed is greatly improved, controllable current uses differential form, when upper axial spherical shell air gap reduces, lower axial ball
Sheath gas gap increases, and when rotating shaft deviates equilbrium position, upper lower axial end magnetizing coil electric current reduces, lower upper axial end magnetizing coil electricity
Stream increase, and upper lower axial end magnetizing coil electric current is identical with lower upper axial end magnetizing coil curent change numerical value, now, upper ball
The suction of face stator countershaft reduces, the suction increase of lower peripheral surface stator countershaft, rotating shaft is returned to its equilbrium position, when upper axle
Increase to spherical shell air gap, lower axial spherical shell air gap reduces, when rotating shaft deviates equilbrium position, upper lower axial end magnetizing coil electric current increases
Greatly, lower upper axial end magnetizing coil electric current reduces, and upper lower axial end magnetizing coil electric current and lower upper axial end magnetizing coil electricity
Rheology numerical value is identical, and now, the suction increase of upper sphere stator countershaft, the suction of lower peripheral surface stator countershaft reduces, makes
Rotating shaft returns to its equilbrium position.As shown in figure 1, upper offset magnetic circuit of the invention is：Magnetic flux from upper stator core right side upper magnetic pole
Face is set out, by upper axial spherical shell right side air gap, rotating shaft iron core, upper axial spherical shell left side air gap, the lower magnetic in upper stator core left side
Pole-face returns to stator core right side upper magnetic pole face, constitutes closed-loop path.Below-center offset magnetic circuit of the invention is：Magnetic flux is from lower stator
Iron core right side upper magnetic pole face is set out, by lower axial spherical shell right side air gap, rotating shaft iron core, lower axial spherical shell left side air gap, lower fixed
Sub- iron core left side lower magnetic pole face returns to lower stator core right side upper magnetic pole face, constitutes closed-loop path.
Compared with existing scheme, major advantage is the solution of the present invention：It is (1) of the invention as a result of sphere magnetic pole,
Compared with the magnetic bearing of existing cylinder magnetic pole, radially interference of the twisting to axial translation is eliminated；(2) stator core uses pole shoe
Structure, makes magnetic field have preferable even circumferential degree；(3) magnetizing coil uses two coil configuration, and two coil turns are different, circle
The few coil current of number is controllable, and the coil current more than the number of turn is constant, and current-responsive speed is improve compared with single coil structure, can
Control electric current uses differential form, further increases the control accuracy of magnetic bearing.
Brief description of the drawings
Fig. 1 is a kind of sectional view of twin coil axial direction pure electromagnetism magnetic bearing of sphere of the technology of the present invention solution；Wherein
Fig. 1 a are the radial direction+X of the twin coil axial direction pure electromagnetism magnetic bearing of sphere to sectional view；Fig. 1 b are the twin coil axial direction pure electromagnetism magnetic of sphere
The radial direction of bearing+Y-direction sectional view；
Fig. 2 is the upper and lower sphere stator and two coil configuration figure of the technology of the present invention solution；Wherein Fig. 2 a are section view
Figure；Fig. 2 b are three dimensional structure diagram；
Fig. 3 is the upper and lower stator core construction figure of the technology of the present invention solution；Wherein Fig. 3 a are sectional view；Fig. 3 b are
Three dimensional structure diagram；
Fig. 4 is the pivot structure figure of the technology of the present invention solution；Wherein Fig. 4 a are sectional view；Fig. 4 b show for three-dimensional structure
It is intended to.
[main mark symbol description]
The upper upper axial end magnetizing coil of stator core, 2-1-, the upper lower axial ends of 3-1- swash under the upper stator cores of 1-1-, 1-2-
Upper axial end magnetizing coil under lower axial end magnetizing coil, 3-2- under magnetic coil, 2-2-, 4- rotating shafts, the upper axial direction spherical shell air gaps of 5-,
Axial spherical shell air gap under 6-.
Specific embodiment
As shown in figure 1, a kind of twin coil axial direction pure electromagnetism magnetic bearing of sphere, is mainly made up of stator system and rotating shaft, it is fixed
Subsystem mainly includes：Upper stator core 1-1, lower stator core 1-2, upper upper axial end magnetizing coil 2-1, upper lower axial end swash
Magnetic coil 3-1, lower lower axial end magnetizing coil 2-2 and lower upper axial end magnetizing coil 3-2；Upper stator core 1-1 includes sphere
Magnetic pole and the right magnetic pole of sphere in left magnetic pole, sphere, upper stator core include magnetic pole and the right magnetic of sphere in the left magnetic pole of sphere, sphere
The area of magnetic pole is more than the left magnetic pole of sphere and the area sum of the right magnetic pole of sphere, magnetic pole preferably in sphere in pole, and sphere
Area is 3 times of the area sum of the left magnetic pole of sphere and the right magnetic pole of sphere, the upper left magnetic pole left side edge of stator core 1-1 spheres with
The angle that the upper right magnetic pole right side edge of stator core 1-1 spheres is formed is 87 °, the upper left magnetic pole right edge of stator core 1-1 spheres
Distance is 1.4mm between magnetic pole left side edge in edge and upper stator core 1-1 spheres, and the upper right magnetic pole of stator core 1-1 spheres is left
Distance is 1.4mm, magnetic in upper stator core 1-1 spheres between magnetic pole right side edge in lateral edges and upper stator core 1-1 spheres
The connection place of pole root left side circular conical surface and magnetic pole in the upper left magnetic pole of stator core 1-1 spheres and upper stator core 1-1 spheres
86 ° are angled, magnetic pole right side circular conical surface and magnetic pole in upper stator core 1-1 spheres and upper fixed in upper stator core 1-1 spheres
The junction angulation of the sub- right magnetic pole of iron core 1-1 spheres is 86 °, and lower stator core 1-2 includes magnetic in the left magnetic pole of sphere, sphere
Pole and the right magnetic pole of sphere, the lower left magnetic pole left side edge of stator core 1-2 spheres and the lower right magnetic pole right edge of stator core 1-2 spheres
The angle that edge is formed is 87 °, and the lower left magnetic pole right side edge of stator core 1-2 spheres is left with magnetic pole in lower stator core 1-2 spheres
Distance is 1.4mm, the lower right magnetic pole left side edge of stator core 1-2 spheres and magnetic in lower stator core 1-2 spheres between lateral edges
Distance is 1.4mm between ultra-Right lateral edges, magnetic pole left side circular conical surface and lower stator core 1-2 balls in lower stator core 1-2 spheres
The junction angulation of magnetic pole is 86 °, magnetic in lower stator core 1-2 spheres in the left magnetic pole in face and lower stator core 1-2 spheres
The connection place of pole root right side circular conical surface and magnetic pole and the right magnetic pole of lower stator core 1-2 spheres in lower stator core 1-2 spheres
86 ° are angled, the radially inner side of the magnetic pole excitatory line of upper axial end in coiling successively from top to bottom in upper stator core 1-1 spheres
The coil turn of circle 2-1 and upper lower axial end magnetizing coil 3-1, upper upper axial end magnetizing coil 2-1 is 100~200 circles, upper axle
It is 20~50 circles to the coil turn of lower end magnetizing coil 3-1, the coil of upper axial end magnetizing coil 2-1 is gone up in the present embodiment
The number of turn is preferably 150 circles, and the coil turn of upper lower axial end magnetizing coil 3-1 is preferably 35 circles, upper stator core 1-1, upper axle
Upper sphere stator, lower stator core 1-2 spheres are collectively formed to upper end magnetizing coil 2-1 and upper lower axial end magnetizing coil 3-1
The radially inner side of middle magnetic pole is wound with lower lower axial end magnetizing coil 2-2 and lower upper axial end magnetizing coil 3- successively from top to bottom
2, coil turn be 80~160 circles, the coil turn of lower upper axial end magnetizing coil 3-2 is 15~40 circles, in the present embodiment
In lower lower axial end magnetizing coil 2-2 coil turns be preferably 150 circles, the coil turn of lower upper axial end magnetizing coil 3-2
Preferably 35 circles, lower stator core 1-2, lower lower axial end magnetizing coil 2-2 and lower upper axial end magnetizing coil 3-2 are collectively formed
Lower peripheral surface stator, rotating shaft 4 is located between upper stator core 1-1 and lower stator core 1-2, sphere and upper stator core in rotating shaft 4
Certain spherical shell gap is left between 1-1 spheres, axial spherical shell air gap 5, the lower peripheral surface of rotating shaft 4 and lower stator core 1-2 balls in formation
Certain spherical shell gap is left between face, lower axial direction spherical shell air gap 6 is formed.
Fig. 2 is upper and lower sphere stator and two coil configuration figure, and Fig. 2 a are sectional view；Fig. 2 b are three dimensional structure diagram, on
Sphere stator mainly includes：Upper stator core 1-1, upper upper axial end magnetizing coil 2-1 and upper lower axial end magnetizing coil 3-1,
Lower peripheral surface stator mainly includes：Lower stator core 1-2, lower lower axial end magnetizing coil 2-2 and lower upper axial end magnetizing coil 3-
2；The angle that the upper left magnetic pole left side edge of stator core 1-1 spheres is formed with the right magnetic pole right side edge of upper stator core 1-1 spheres
It is 87 °, the spacing of the upper left magnetic pole right side edge of stator core 1-1 spheres and magnetic pole left side edge in upper stator core 1-1 spheres
From being 1.4mm, the upper right magnetic pole left side edge of stator core 1-1 spheres and magnetic pole right side edge in upper stator core 1-1 spheres it
Between distance be 1.4mm, the magnetic pole root left side circular conical surface and upper left magnetic pole of stator core 1-1 spheres in upper stator core 1-1 spheres
Junction angulation with magnetic pole in upper stator core 1-1 spheres is 86 °, and magnetic pole root is right in upper stator core 1-1 spheres
Side circular conical surface is with the junction angulation of magnetic pole in upper stator core 1-1 spheres and the upper right magnetic pole of stator core 1-1 spheres
86 °, the folder that the lower left magnetic pole left side edge of stator core 1-2 spheres is formed with the right magnetic pole right side edge of lower stator core 1-2 spheres
Angle is 87 °, in the lower left magnetic pole right side edge of stator core 1-2 spheres and lower stator core 1-2 spheres between magnetic pole left side edge
Distance is 1.4mm, the lower right magnetic pole left side edge of stator core 1-2 spheres and magnetic pole right side edge in lower stator core 1-2 spheres
Between distance be 1.4mm, in lower stator core 1-2 spheres magnetic pole root left side circular conical surface and the left magnetic poles of lower stator core 1-2 and
The junction angulation of magnetic pole is 86 ° in lower stator core 1-2 spheres, magnetic pole root right side in lower stator core 1-2 spheres
Circular conical surface is with the junction angulation of magnetic pole and the right magnetic pole of lower stator core 1-2 spheres in lower stator core 1-2 spheres
86 °, in upper stator core 1-1 spheres the radially inner side of magnetic pole from top to bottom successively in coiling upper axial end magnetizing coil 2-1 and
The coil turn of upper lower axial end magnetizing coil 3-1, upper upper axial end magnetizing coil 2-1 is 100~200 circles, upper lower axial end
The coil turn of magnetizing coil 3-1 is 20~50 circles, and the coil turn that upper axial end magnetizing coil 2-1 is gone up in the present embodiment is excellent
Elect 150 circles as, the coil turn of upper lower axial end magnetizing coil 3-1 is preferably 35 circles, magnetic pole in lower stator core 1-2 spheres
Radially inner side is wound with lower lower axial end magnetizing coil 2-2 and lower upper axial end magnetizing coil 3-2, lower axial direction successively from top to bottom
The coil turn of lower end magnetizing coil 2-2 is 80~160 circles, and the coil turn of lower upper axial end magnetizing coil 3-2 is 15~40
Circle, lower lower axial end magnetizing coil 2-2 coil turns in the present embodiment are preferably 150 circles, lower upper axial end magnetizing coil
The coil turn of 3-2 is preferably 35 circles.Between the axial direction of upper upper axial end magnetizing coil 2-1 and upper lower axial end magnetizing coil 3-1
Gap is that the axial gap of 0.5mm~0.8mm, lower lower axial end magnetizing coil 2-2 and lower upper axial end magnetizing coil 3-2 is
0.5mm~0.8mm, goes up the axial gap of upper axial end magnetizing coil 2-1 and upper lower axial end magnetizing coil 3-1 in the present invention
The axial gap of preferably 0.5mm, lower lower axial end magnetizing coil 2-2 and lower upper axial end magnetizing coil 3-2 is preferably
0.5mm.The principle of preferred gap to ensure two coils after electric current is each led into, the mutual inductance for being formed between the two it is minimum and
Leakage field is minimum.
Fig. 3 is the upper and lower stator core construction figure of the technology of the present invention solution；Wherein Fig. 3 a are sectional view；Fig. 3 b are
Three dimensional structure diagram, the upper left magnetic pole left side edge of stator core 1-1 spheres and the left magnetic pole left circles of upper stator core 1-1 spheres
Arc edge tangent line angle is 47 °, and the upper left magnetic pole right side edge of stator core 1-1 spheres is left with upper stator core 1-1 spheres
Magnetic pole right circular arc edge tangent line angle is 113 °, magnetic pole left side edge and upper stator iron in upper stator core 1-1 spheres
Magnetic pole left arc edge tangent line angle is 71 °, magnetic pole right side edge in upper stator core 1-1 spheres in core 1-1 spheres
It is 71 °, the upper right magnetic of stator core 1-1 spheres with magnetic pole right circular arc edge tangent line angle in upper stator core 1-1 spheres
Ultra-Left lateral edges are 113 °, upper stator core 1-1 balls with the right magnetic pole left arc edge tangent line angles of upper stator core 1-1
The right magnetic pole right side edge in face is 47 °, lower stator with the right magnetic pole right circular arc edge tangent line angle of upper stator core 1-1 spheres
The left magnetic pole left side edge of iron core 1-2 spheres is with the left magnetic pole left arc edge tangent line angle of lower stator core 1-2 spheres
47 °, the lower left magnetic pole right side edge of stator core 1-2 spheres and the left magnetic pole right circular arc edge tangent line of upper stator core 1-1 spheres
Angle is 113 °, magnetic pole left side edge and magnetic pole left circles in lower stator core 1-2 spheres in lower stator core 1-2 spheres
Arc edge tangent line angle is 71 °, in lower stator core 1-2 spheres in magnetic pole right side edge and lower stator core 1-2 spheres
Magnetic pole right circular arc edge tangent line angle is 71 °, the lower right magnetic pole left side edge of stator core 1-2 spheres and lower stator core
The right magnetic pole left arc edge tangent line angle of 1-2 spheres be 113 °, the lower right magnetic pole right side edge of stator core 1-2 spheres with
The lower right magnetic pole right circular arc edge tangent line angle of stator core 1-2 spheres is 47 °, and the determination of above-mentioned all angles is to pass through
The optimal corner angle value that substantial amounts of emulation and experiment are obtained, can cause that air-gap field fluctuation in a circumferential direction is minimum, peak-to-peak
Value can be in below 20mT, and upper stator core 1-1 and lower stator core 1-2 are 1J22 magnetic conduction bulk materials, upper stator core 1-1
Spherical radius with lower stator core 1-2 takes 20mm~50mm, and stator core 1-1 and lower stator core 1-2 is gone up in the present invention
Spherical radius take 22.5mm, and the appearance and size of upper stator core 1-1 and lower stator core 1-2 is essentially equal, two after installation
Person's centre of sphere is completely superposed.
Fig. 4 is the pivot structure figure of the technology of the present invention solution；Wherein Fig. 4 a are sectional view；Fig. 4 b show for three-dimensional structure
It is intended to.The spherical radius of rotating shaft 4 takes 19mm~49mm, and the spherical radius of rotating shaft in the present embodiment 4 takes 22mm, ball in rotating shaft 4
Centre of sphere angle corresponding to face is 84 °, sphere left side edge and sphere left arc edge tangent line institute in rotating shaft 4 into folder in rotating shaft 4
Angle is 132 °, and sphere right side edge and sphere right circular arc edge tangent line angle in rotating shaft 4 are 132 °, rotating shaft 4 in rotating shaft 4
Centre of sphere angle corresponding to lower peripheral surface is 84 °, the lower peripheral surface left side edge of rotating shaft 4 and the lower peripheral surface left arc edge tangent line institute of rotating shaft 4
It it is 132 ° into angle, the lower peripheral surface right side edge of rotating shaft 4 is 132 ° with the lower peripheral surface right circular arc edge tangent line angle of rotating shaft 4.
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 is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of twin coil axial direction pure electromagnetism magnetic bearing of sphere, is mainly made up of stator system and rotating shaft two parts, and its feature exists
In：Stator system mainly includes：Upper stator core (1-1), lower stator core (1-2), upper upper axial end magnetizing coil (2-1),
Upper lower axial end magnetizing coil (3-1), lower lower axial end magnetizing coil (2-2) and lower upper axial end magnetizing coil (3-2)；
Wherein going up stator core (1-1) includes magnetic pole and the right magnetic pole of sphere, upper stator core (1-1) in the left magnetic pole of sphere, sphere
The angle that the left magnetic pole left side edge of sphere is formed with the right magnetic pole right side edge of upper stator core (1-1) sphere is 87 °, upper stator iron
Magnetic pole root left side circular conical surface and the left magnetic pole of upper stator core (1-1) sphere and upper stator core (1-1) ball in core (1-1) sphere
The junction angulation of magnetic pole is 86 ° in face, magnetic pole root right side circular conical surface and upper stator in upper stator core (1-1) sphere
The junction angulation of magnetic pole and upper stator core (1-1) right magnetic pole of sphere is 86 ° in iron core (1-1) sphere；Lower stator iron
Core (1-2) includes magnetic pole and the right magnetic pole of sphere, the left magnetic pole left side of lower stator core (1-2) sphere in the left magnetic pole of sphere, sphere
The angle that edge is formed with the right magnetic pole right side edge of lower stator core (1-2) sphere is 87 °, magnetic in lower stator core (1-2) sphere
The connection of pole root left side circular conical surface and magnetic pole in the left magnetic pole of lower stator core (1-2) sphere and lower stator core (1-2) sphere
Place is angled 86 °, magnetic pole root right side circular conical surface and lower stator core (1-2) sphere in lower stator core (1-2) sphere
The junction angulation of middle magnetic pole and lower stator core (1-2) right magnetic pole of sphere is 86 °, in upper stator core (1-1) sphere
The radially inner side of magnetic pole upper axial end magnetizing coil (2-1) and upper lower axial end magnetizing coil (3- in coiling successively from top to bottom
1), upper stator core (1-1), upper upper axial end magnetizing coil (2-1) and upper lower axial end magnetizing coil (3-1) are collectively formed
Sphere stator, to be wound with lower lower axial end successively from top to bottom excitatory for the radially inner side of magnetic pole in lower stator core (1-2) sphere
Coil (2-2) and lower upper axial end magnetizing coil (3-2), lower stator core (1-2), lower lower axial end magnetizing coil (2-2) and
Lower upper axial end magnetizing coil (3-2) collectively forms lower peripheral surface stator, and rotating shaft (4) is positioned at upper stator core (1-1) and lower stator
Between iron core (1-2), certain spherical shell gap, shape are left between sphere and each magnetic pole sphere of upper stator core (1-1) in rotating shaft (4)
Into upper axial spherical shell air gap (5), certain spherical shell is left between rotating shaft (4) lower peripheral surface and lower each magnetic pole sphere of stator core (1-2)
Gap, forms lower axial direction spherical shell air gap (6).
2. a kind of twin coil axial direction according to claim 1 pure electromagnetism magnetic bearing of sphere, it is characterised in that：Described is upper fixed
The left magnetic pole left arc edge tangent line institute of the left magnetic pole left side edge of sub- iron core (1-1) sphere and upper stator core (1-1) sphere into
Angle is 47 °, the left magnetic pole right side edge of upper stator core (1-1) sphere and the left magnetic pole right circles of upper stator core (1-1) sphere
Arc edge tangent line angle is 113 °, magnetic pole left side edge and upper stator core (1-1) ball in upper stator core (1-1) sphere
Magnetic pole left arc edge tangent line angle is 71 ° in face, and magnetic pole right side edge is fixed with upper in upper stator core (1-1) sphere
Magnetic pole right circular arc edge tangent line angle is 71 °, upper stator core (1-1) the right magnetic pole of sphere in sub- iron core (1-1) sphere
Left side edge is 113 °, upper stator core with the right magnetic pole left arc edge tangent line angle of upper stator core (1-1) sphere
The right magnetic pole right side edge of (1-1) sphere is with the right magnetic pole right circular arc edge tangent line angle of upper stator core (1-1) sphere
47 °, the left magnetic pole left side edge of lower stator core (1-2) sphere and the lower left magnetic pole left arc edge of stator core (1-2) sphere
Tangent line angle is 47 °, the left magnetic pole right side edge of lower stator core (1-2) sphere and lower stator core (1-2) the left magnetic of sphere
Ultra-Right side arc edge tangent line angle is 113 °, magnetic pole left side edge and lower stator iron in lower stator core (1-2) sphere
Magnetic pole left arc edge tangent line angle is 71 ° in core (1-2) sphere, magnetic pole right side in lower stator core (1-2) sphere
Edge is 71 °, lower stator core (1-2) with magnetic pole right circular arc edge tangent line angle in lower stator core (1-2) sphere
The right magnetic pole left side edge of sphere is 113 ° with the right magnetic pole left arc edge tangent line angle of lower stator core (1-2) sphere,
The right magnetic pole right side edge of lower stator core (1-2) sphere and the right magnetic pole right circular arc edge tangent line of lower stator core (1-2) sphere
Angle is 47 °.
3. a kind of twin coil axial direction according to claim 1 pure electromagnetism magnetic bearing of sphere, it is characterised in that：Described is upper fixed
Sub- iron core (1-1) and lower stator core (1-2) are 1J22 magnetic conduction bulk materials.
4. a kind of twin coil axial direction according to claim 1 pure electromagnetism magnetic bearing of sphere, it is characterised in that：Described is upper fixed
The spherical radius of sub- iron core (1-1) and lower stator core (1-2) takes 20mm~50mm, and upper stator core (1-1) and lower stator
The appearance and size of iron core (1-2) is essentially equal, installs the latter two centre ofs sphere and is completely superposed.
5. a kind of twin coil axial direction according to claim 1 pure electromagnetism magnetic bearing of sphere, it is characterised in that：Described upper axle
It is 0.5mm~0.8mm to the axial gap of upper end magnetizing coil (2-1) and upper lower axial end magnetizing coil (3-1), lower axle is downward
The axial gap of end magnetizing coil (2-2) and lower upper axial end magnetizing coil (3-2) is 0.5mm~0.8mm.
6. a kind of twin coil axial direction according to claim 1 pure electromagnetism magnetic bearing of sphere, it is characterised in that：Described rotating shaft
(4) spherical radius takes 19mm~49mm, and the centre of sphere angle in rotating shaft (4) corresponding to sphere is 84 °, sphere left side in rotating shaft (4)
Edge is 132 °, sphere right side edge and rotating shaft in rotating shaft (4) with sphere left arc edge tangent line angle in rotating shaft (4)
(4) sphere right circular arc edge tangent line angle is 132 ° on, and the centre of sphere angle corresponding to rotating shaft (4) lower peripheral surface is 84 °, rotating shaft
(4) lower peripheral surface left side edge and rotating shaft (4) lower peripheral surface left arc edge tangent line angle are 132 °, rotating shaft (4) lower peripheral surface
Right side edge is 132 ° with rotating shaft (4) lower peripheral surface right circular arc edge tangent line angle.
7. a kind of twin coil axial direction according to claim 1 pure electromagnetism magnetic bearing of sphere, it is characterised in that：Described upper axle
It is 0.5mm~0.7mm to spherical shell air gap (5) and lower axial spherical shell air gap (6) size.
8. a kind of twin coil axial direction according to claim 1 pure electromagnetism magnetic bearing of sphere, it is characterised in that：The upper stator
The area of magnetic pole is more than the left magnetic pole of sphere and the area sum of the right magnetic pole of sphere in the sphere of iron core (1-1)；Magnetic pole in sphere
Area is 3 times of the area sum of the left magnetic pole of sphere and the right magnetic pole of sphere.
9. a kind of twin coil axial direction according to claim 1 pure electromagnetism magnetic bearing of sphere, it is characterised in that：The upper stator
Distance is between the left magnetic pole right side edge of iron core (1-1) sphere and magnetic pole left side edge in upper stator core (1-1) sphere
1.4mm, the right magnetic pole left side edge of upper stator core (1-1) sphere and magnetic pole right side edge in upper stator core (1-1) sphere it
Between distance be 1.4mm；The left magnetic pole right side edge of lower stator core (1-2) sphere is left with magnetic pole in lower stator core (1-2) sphere
Distance is 1.4mm, the right magnetic pole left side edge of lower stator core (1-2) sphere and lower stator core (1-2) sphere between lateral edges
Distance is 1.4mm between middle magnetic pole right side edge.
10. a kind of twin coil axial direction according to claim 1 pure electromagnetism magnetic bearing of sphere, it is characterised in that：The upper axle
It is 100~200 circles to the coil turn of upper end magnetizing coil (2-1), the coil turn of upper lower axial end magnetizing coil (3-1) is
20~50 circles；The coil turn of lower lower axial end magnetizing coil (2-2) is 80~160 circles, lower upper axial end magnetizing coil (3-2)
Coil turn be 15~40 circles.
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| CN201510370246.2A CN104948583B (en) | 2015-06-29 | 2015-06-29 | A kind of twin coil axial direction pure electromagnetism magnetic bearing of sphere |
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| CN201510370246.2A CN104948583B (en) | 2015-06-29 | 2015-06-29 | A kind of twin coil axial direction pure electromagnetism magnetic bearing of sphere |
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| CN104948583B true CN104948583B (en) | 2017-06-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH01242820A (en) * | 1988-03-24 | 1989-09-27 | Toshiba Corp | Swivel bearing device |
| DE102005032673A1 (en) * | 2005-07-13 | 2007-01-18 | Renk Aktiengesellschaft | Active magnetic bearing for large shaft, comprises stator housing with lining assembled of two semispherical shells |
| JP2010270828A (en) * | 2009-05-21 | 2010-12-02 | Mecha-Cell Co Ltd | Spherical bearing |
| CN204267527U (en) * | 2014-11-14 | 2015-04-15 | 北京石油化工学院 | A kind of two-freedom external rotor permanent magnet is biased spherical radial direction magnetic bearing |
| CN204267529U (en) * | 2014-11-14 | 2015-04-15 | 北京石油化工学院 | A kind of two-freedom internal rotor permanent-magnetic is biased spherical radial direction magnetic bearing |
| CN104389903B (en) * | 2014-11-15 | 2016-11-02 | 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 |
| CN104373461B (en) * | 2014-11-15 | 2016-10-26 | 北京石油化工学院 | A kind of dual permanent-magnet internal rotor permanent-magnetic biases ball face radial direction magnetic bearing |
| CN204419855U (en) * | 2015-01-21 | 2015-06-24 | 北京石油化工学院 | The pure electromagnetism magnetic bearing of a kind of spherical radial direction of external rotor |
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