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Permanent magnet biased axial magnetic suspension bearing

An axial and permanent magnet technology, applied in the direction of shafts and bearings, bearings, mechanical equipment, etc., can solve the problems of volume, weight and power consumption, and achieve the effect of reducing volume and broad application prospects

Inactive Publication Date: 2007-12-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The active magnetic suspension bearing establishes a bias magnetic field in the air gap through the bias winding of direct current, and establishes a control magnetic field in the air gap through the control winding of alternating current whose size and direction are controlled in real time. The superposition and cancellation of the magnetic field in the air gap produces a magnetic field attraction whose size and direction can be actively controlled, thus realizing the stable suspension of the rotor. This type of magnetic bearing has high rigidity and can be precisely controlled, but it needs to produce a unit bearing capacity. The volume, weight and power consumption are relatively large

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Embodiment Construction

[0013] Fig. 1 is a schematic structural view of the permanent magnet bias axial magnetic suspension bearing of the present invention, in which the stator sleeve 1, the axial magnetic pole 2, the magnetic conduction ring 3, the stator disc 6 and the thrust disc 7 are all made of solid soft magnetic materials As a result, the annular permanent magnet 5 is made of rare earth permanent magnet material, and the main shaft 7 is made of non-magnetic material. The stator disk 6 is set inside the stator sleeve 1, and its outer end surface is in contact with the inner end surface of the stator sleeve 1. The control winding 8 wound by enameled wire is located in the space surrounded by the stator sleeve 1 and the stator disk 6. The axial magnetic pole 2 is set inside the stator disc 6, its outer end surface is in contact with the inner end surface of the stator disc 6, and the annular permanent magnet 5 is embedded between the axial magnetic pole 2 and the magnetic conduction ring 3, and ...

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Abstract

This invention relates to a magnet offset axial magnetic-suspension bearing including a stator sleeve, a control winding, a stator disk, an axial magnetic pole, a ring magnet, a magnetic-conduction ring and a main shaft sleeved with a thrust disk, which is simple, small, light with small power loss.

Description

1. Technical field [0001] The permanent magnetic bias axial magnetic suspension bearing of the present invention belongs to the hybrid type magnetic suspension bearing in the magnetic suspension bearing. 2. Background technology [0002] At present, magnetic suspension bearings can be divided into three types: active type, passive type and hybrid type according to the way the magnetic field is established. [0003] The active magnetic suspension bearing establishes a bias magnetic field in the air gap through the bias winding of direct current, and establishes a control magnetic field in the air gap through the control winding of alternating current whose size and direction are controlled in real time. The superposition and cancellation of the magnetic field in the air gap produces a magnetic field attraction whose size and direction can be actively controlled, thus realizing the stable suspension of the rotor. This type of magnetic bearing has high rigidity and can be preci...

Claims

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Application Information

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IPC IPC(8): F16C32/04
Inventor 梅磊邓智泉王晓琳赵旭升
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS