Permanent-magnetic passive axial magnetic suspension bearing with passive damping effect

A magnetic suspension bearing and passive damping technology, applied in the direction of shafts and bearings, bearings, mechanical equipment, etc., can solve the problems of easy displacement shock and affect system reliability, and achieve the effect of reducing weight, maintaining reliability and eliminating loss.

Active Publication Date: 2012-05-02
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, passive magnetic suspension bearings are prone to displacement shocks when the supported parts are displaced axially, which affects the reliability of the system. The current method is to add an active control coil in the axial or radial direction on the basis of passive magnetic suspension bearings. , this method can eliminate the displacement oscillation, but this will increase the controller to control the increase of the active coil current, and at the same time, the axial sensor should be set in the axial direction of the system

Method used

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  • Permanent-magnetic passive axial magnetic suspension bearing with passive damping effect
  • Permanent-magnetic passive axial magnetic suspension bearing with passive damping effect
  • Permanent-magnetic passive axial magnetic suspension bearing with passive damping effect

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Embodiment Construction

[0009] figure 1 As the basic form of the present invention, the magnetic bearing is sub-package and consists of a static part and a movable part, the static part is connected with the fixed part of the equipment, and the movable part is connected with the rotating part of the equipment. The static part includes 1 stator bearing installation sleeve 1, 1 stator damping installation sleeve 5, 4 stator magnetic conducting rings 2, 3 stator permanent magnets 3, 3 stator damping permanent magnets 6; the movable part includes 1 rotor shaft 11. 1 hollow cup rotor 9. 4 rotor teeth 4. 1 damping copper sleeve 8. In the static part, 3 stator permanent magnets 3 and 4 stator magnetic conducting rings are arranged in cross order, and are installed on the stator bearing installation sleeve 1 together. form arrangement. The stator damping permanent magnet 6 is composed of 3 permanent magnets according to the Halbach magnetization method. The first permanent magnet is radially magnetized, a...

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Abstract

The invention discloses a permanent-magnetic passive axial magnetic suspension bearing with passive damping effect. The magnetic bearing is split, and consists of a static part and a movable part. The static part comprises a stator bearing mounting sleeve, a stator damping mounting sleeve, stator magnetic rings, stator permanent magnets and a stator damping permanent magnet; and the movable part has hollow cup structure, and comprises a rotor shaft, a hollow cup rotor, rotor teeth and a damping copper bush. In the static part, three stator permanent magnets and four stator magnetic rings are sequentially arranged across in the axial direction, arranged on the stator bearing mounting sleeve together and used for providing rigidity for a system. The stator damping permanent magnet consists of three permanent magnets in a Halbach magnetizing mode, arranged on the stator damping mounting sleeve and used for providing damping for the system. According to the magnetic suspension bearing, anaxial sensor and a control system are saved, the volume is reduced, the weight is lightened, and the loss is eliminated. Through the passive damping structure of the magnetic suspension bearing, the oscillation of a rotor can be quickly attenuated, and the reliability of the system is improved.

Description

technical field [0001] The invention relates to a non-contact magnetic suspension bearing, in particular to a permanent magnet passive axial magnetic suspension bearing with passive damping effect, which can be used as non-contact support for rotating parts in mechanical equipment such as motors and machine tools. Background technique [0002] Magnetic suspension bearings are divided into active and passive types. Active magnetic suspension bearings are magnetic suspension bearings that superimpose the magnetic field generated by the control coil on the basis of permanent magnetic bias. Passive magnetic suspension bearings are magnetic suspension bearings that only have permanent magnetic fields. Active magnetic suspension bearings can provide suspension supports with variable stiffness and damping, so they can withstand large dynamic loads and have strong motion stability. But it also has several deficiencies. One is that multiple sensors that require high precision must be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/04
Inventor 房建成乐韵孙津济
Owner BEIHANG UNIV
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