Magnetic circuit decoupled and permanent magnet biased active-passive hybrid axial-radial magnetic bearing

A magnetic levitation bearing and permanent magnetic bias technology, applied in the field of magnetic bearings, can solve the problems of large volume, internal and external structure repulsion type radial passive magnetic bearings, small radial stiffness, large power consumption, etc., to achieve reduced magnetic resistance and compact structure , reducing the effect of torque coupling

Active Publication Date: 2015-08-12
GREAT POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of large power consumption of the independent use of the same polarity permanent magnet bias axial active magnetic bearing, the independent use of internal and external structure repulsion type radial passive magnetic bearings with small radial stiffness, and the same polarity permanent magnet bias axial The problem of large volume when the active magnetic bearing and the internal and external structure repulsion type radial passive magnetic bearing are used in combination, the present invention provides a permanent magnetic bias active and passive hybrid shaft radial magnetic suspension bearing with decoupled magnetic circuit

Method used

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  • Magnetic circuit decoupled and permanent magnet biased active-passive hybrid axial-radial magnetic bearing

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specific Embodiment approach 1

[0043] Specific implementation mode one: combine figure 1 with 2Describe this embodiment, the magnetic circuit decoupling permanent magnet bias active and passive hybrid axial radial magnetic suspension bearing described in this embodiment, the magnetic suspension bearing includes internal and external structure repulsion type radial passive magnetic bearing and permanent magnetic bearing of the same polarity The magnetic bias axial active magnetic bearing; the same polarity permanent magnet bias axial active magnetic bearing includes a stator and the rotor, and the repulsive radial passive magnetic bearing includes a permanent magnet 3 on the stator side and a permanent magnet 4 on the rotor side. The inner and outer structures The repulsion type radial passive magnetic bearing is placed in the cavity between the rotor and the stator of the same polarity permanent magnet bias axial active magnetic bearing, and the rotor and the stator of the same polarity permanent magnet bia...

specific Embodiment approach 2

[0045] Specific implementation mode two: combination image 3 , Figure 4 , Figure 5 , Image 6 with Figure 18 Describe this embodiment. This embodiment is a further definition of the magnetic circuit decoupling permanent magnet bias active and passive hybrid axial radial magnetic suspension bearing described in the first embodiment. The same polarity permanent magnet bias shaft The active magnetic bearing includes a stator and a rotor, and there is an axial air gap between the stator and the rotor; the stator includes armature teeth 1, a stator core and two flat stator permanent magnets 5, and the rotor includes a rotor core 6 and a shaft 11, The rotor core 6 is fixed on the shaft 11; the stator core includes a left half stator core 2-1 and a right half stator core 2-2;

[0046] Two flat stator permanent magnets 5 are arranged between the left half stator core 2-1 and the right half stator core 2-2, and form a cylindrical structure; the rotor core 6 is located in the cy...

specific Embodiment approach 3

[0058] Specific implementation mode three: combination Figure 7 This embodiment is described. This embodiment is a further limitation of the magnetic circuit decoupling permanent magnet bias active and passive hybrid axial radial magnetic suspension bearing described in the second specific embodiment.

[0059] The rotor side permanent magnet 4 is composed of two rotor permanent magnet rings, and the two rotor permanent magnet rings are arranged and fixed in sequence along the axial direction, and are fixed on the outer circular surface of the rotor iron core 6; The direction of magnetization is opposite;

[0060] The stator side permanent magnet 3 is composed of two stator permanent magnet rings, and the two stator permanent magnets are arranged and fixed in sequence along the axial direction as a whole, and are fixed on the inner circular surface of the cylindrical structure; the magnetization of the two stator permanent magnet rings in the opposite direction.

[0061] In ...

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Abstract

The invention relates to a magnetic circuit decoupled and permanent magnet biased active-passive hybrid axial-radial magnetic bearing, belongs to the technical field of magnetic bearings and solves the problems that the independent use of a co-polar permanent magnet biased axial active magnetic bearing causes high power consumption, the independent use of an inside-outside repulsive radial passive magnetic bearing causes small radial rigidity, and the hybrid use of the co-polar permanent magnet biased axial active magnetic bearing and the inside-outside repulsive radial passive magnetic bearing causes large size. The magnetic circuit decoupled and permanent magnet biased active-passive hybrid axial-radial magnetic bearing comprises an inside-outside repulsive radial passive magnetic bearing and a co-polar permanent magnet biased axial active magnetic bearing; the co-polar permanent magnet biased axial active magnetic bearing comprises a stator and a rotor; the inside-outside repulsive radial passive magnetic bearing comprises a stator side permanent magnet and a rotor side permanent magnet; the inside-outside repulsive radial passive magnetic bearing is disposed in a cavity between the rotor and stator of the co-polar permanent magnet biased axial active magnetic bearing; an axial air gap is formed between the rotor and the stator of the co-polar permanent magnet biased axial active magnetic bearing; a radial air gap is formed between the rotor side permanent and stator side permanent magnet of the inside-outside repulsive radial passive magnetic bearing. The magnetic circuit decoupled and permanent magnet biased active-passive hybrid axial-radial magnetic bearing is suitable for the fields such as machining, turbine machinery and aerospace.

Description

technical field [0001] The invention belongs to the technical field of magnetic bearings. Background technique [0002] Magnetic suspension bearing is a new type of high-performance bearing that uses magnetic field force to suspend the rotor in space, so that there is no mechanical contact between the rotor and the stator. It has the advantages of no friction, no loss, no pollution, low energy consumption, low noise and long life. , especially suitable for high-speed, vacuum, ultra-clean and other special environments. It can be widely used in the fields of mechanical processing, turbomachinery, aerospace, petroleum and petrochemical, vacuum technology, energy, rotor dynamics characteristics identification and testing, etc. [0003] Traditional magnetic suspension bearings are mainly based on the working principle of electromagnets, using the electromagnetic attraction between the stator and rotor to levitate the rotor. For this reason, a large current needs to be passed in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/04
CPCF16C32/0465F16C32/0478F16C32/0485F16C2300/02
Inventor 宋立伟李书培
Owner GREAT POWER CO LTD
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