High-stiffness high-damping axial passive magnetic bearing with magnetic circuit decoupling function
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A high-rigidity, high-damping technology, applied in the direction of shafts and bearings, bearings, anti-centrifugal force rotating parts, etc., can solve the problems of non-closed magnetic circuits, small support stiffness and damping, and optimized design of high stiffness to achieve improved uniformity The effect of reducing magnetic flux leakage and improving the utilization rate of magnetic flux
Inactive Publication Date: 2018-11-06
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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Chinese patent 200510011689.9 proposes a passive axial magnetic suspension bearing with damping effect, which realizes the integration of axial passive magnetic bearing and damper, but the supporting force is small and the axial dimension is large. Chinese patent 201710260008.5 proposes a Halbach permanent bearing with damping effect The magnetically passive axial magnetic suspension bearing uses the Halbach permanent magnet array to increase the support stiffness, but the radial dimension is relatively large. The above two patents integrate the passive magnetic bearing and the damper to reduce the volume and weight of the system, but the designed The magnetic circuit does not form a closure, and there are more magnetic flux leakage, which fails to make full use of the magnetic flux generated by the magnetic steel, resulting in low suspension support accuracy, low support stiffness and damping
Chinese patent 201110276772.4 proposes a permanent magnet passive axial magnetic suspension bearing with passive damping effect, but the magnetic flux used to support the rotor suspension and the magnetic flux generating damping effect are coupled with each other, and it is difficult to optimize the design of the respective magnetic circuits to achieve high stiffness and high damping
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[0014] The preferred embodiment of the high stiffness and high damping axial passive magnetic bearing with magnetic circuit decoupling of the present invention is as follows:
[0015]It is mainly composed of stator system and rotor system. The stator system mainly includes: outer mounting sleeve, outer magnetic ring, outer upper magnetic isolation ring, outer lower magnetic isolation ring, outer upper radial magnetization magnet steel, outer lower radial magnetization Magnetic steel, outer middle radial magnetic steel, outer middle upper magnetic ring, outer middle lower magnetic ring, outer upper axial magnetic steel, outer lower axial magnetic steel, outer middle upper axial Magnetic steel, outer, middle and lower axially magnetized magnetic steel, outer upper paramagnetic ring, outer lower paramagnetic ring, outer middle paramagnetic ring, outer magnetic steel lock nut, fixing seat, outer component lock nut, inner installation sleeve, Inner magnetic ring, inner upper magnet...
specific Embodiment
[0021] Such as figure 1 , 2As shown, the high-stiffness and high-damping axial passive magnetic bearing with magnetic circuit decoupling is mainly composed of a stator system and a rotor system. Ring 3A, Outer and lower magnetic separation ring 3B, Outer and upper radial magnetization magnet 4A, Outer and lower radial magnetization magnet 4B, Outer and middle radial magnetization magnet 5, Outer and middle upper and outer magnetic separation ring 6A, Outer and middle Lower spacer magnet ring 6B, outer upper axial magnetization magnet 7A, outer lower axial magnetization magnet 7B, outer middle upper axial magnetization magnet 8A, outer middle lower axial magnetization magnet 8B, outer upper Paramagnetic ring 9A, outer lower paramagnetic ring 9B, outer middle paramagnetic ring 10, outer magnetic steel lock nut 11, fixing seat 12, outer component lock nut 13, inner mounting sleeve 14, inner magnetic guide ring 15, inner upper magnet Steel 16A, inner lower magnetic steel 16B, in...
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Abstract
The invention discloses a high-stiffness high-damping axial passive magnetic bearing with a magnetic circuit decoupling function. The high-stiffness high-damping axial passive magnetic bearing comprises a stator system and a rotor system; the stator is connected with a base of equipment, and the rotor system is connected with a rotating part of the equipment. The stator system mainly comprises mounting sleeves, magnetic conducting rings, magnetic isolating rings, pieces of radial magnetizing magnetic steel, pieces of axial magnetizing magnetic steel, paramagnetic rings, magnetic steel lock nuts, fixing seats, and assembly lock nuts; and the rotor system mainly comprises rotating shafts, rotor magnetic isolating rings, rotor magnetic conducting rings, damping sleeves, rotor magnetic isolating rings and rotor assembly lock nuts. According to the high-stiffness high-damping axial passive magnetic bearing, the multiple circles of magnetic steel are adopted to enable magnetic flux to converge, the magnetic field intensity of an air gap is improved, and high-stiffness supporting is realized; through the scheme of internal arranging of the magnetic steel, the magnetic flux density uniformity of the air gap is improved, and interference force to the rotor system is not generated; high damping is achieved through the multiple circles of damping sleeves, in addition, all magnetic circuits are closed, magnetic flux leakage is reduced, and the utilizing rate of the magnetic flux is increased; and a magnetic flux loop for supporting and a magnetic flux loop realizing damping are mutually decoupled, and thus optimized design can be conducted on the supporting stiffness and damping of the magnetic bearing.
Description
technical field [0001] The invention relates to a non-contact magnetic suspension bearing, in particular to a high-rigidity and high-damping axial passive magnetic bearing decoupled from a magnetic circuit, which can be used for non-contact support of rotating parts in mechanical equipment such as motors, machine tools, and magnetic suspension platforms. Background technique [0002] Magnetic bearings can be divided into active magnetic bearings and passive magnetic bearings. Active magnetic bearings often use high-precision displacement sensors and high-quality controllers to control the attitude of the suspended rotor, which can suppress the vibration of the rotor, but the cost is high, the system is complex, and the reliability is low. Passive magnetic bearings do not require feedback control systems and power supplies, and have the advantages of low cost, high system reliability, and low loss. However, most passive magnetic bearings lack effective damping effect, and th...
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Application Information
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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/04
CPCF16C32/0417F16C2202/40F16C2322/39F16C2380/26
Inventor 马丽梅赵勇刘强隋金玲张淞铭保俊吴立志单希林吴波
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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