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Hybrid Offset Radial Magnetic Bearings

A magnetic bearing, offset technology, applied in the direction of bearings, shafts and bearings, mechanical equipment, etc., can solve problems such as damage to machines, major accidents, abnormal shutdowns, etc.

Active Publication Date: 2016-06-29
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the working condition of the rotor exceeds the maximum capacity of the magnetic suspension bearing, it will cause abnormal shutdown at the slightest, damage to the machine at the worst, and even a major accident may occur

Method used

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  • Hybrid Offset Radial Magnetic Bearings
  • Hybrid Offset Radial Magnetic Bearings

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] The hybrid offset radial magnetic suspension bearing of the present invention includes two parts: a rotor assembly and a stator assembly. Specifically, the rotor assembly includes: main shaft, 4 sets of rotor annular magnetically conductive laminations, 2 rotor annular magnetically conductive spacers and 1 rotor annular nonmagnetically conductive spacer. The stator assembly includes: ring-shaped permanent magnets, 2 sets of stator inner magnetic sleeves, 4 sets of stator pole laminations (the number of magnetic poles in each set of stator pole laminations is 4n, n is a positive integer, n is taken as 2 in Figure 1) , 4 sets of control coils (the number of each set of control coils is 4n), 4 sets of insulating square sleeves (the number of each set of insulating square sleeves is 4n), 2 stator non-magnetic sheaths, 2 stator magnetic cover plates...

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Abstract

The invention discloses a hybrid biased radial magnetic suspension bearing and belongs to a hybrid magnetic suspension bearing. A bias magnetic field is built at a radial gap between a stator pole lamination and a corresponding rotor annular magnetic lamination by using an axially magnetized annular permanent magnet and an electromagnetic bias coil; a control magnetic field is produced by using a control coil wound on the pole of the stator pole lamination; the adjustable bias magnetic field and the control magnetic field produce magnetic forces for a rotor to control the radial displacement of the rotor; a cooling holes are formed in a stator magnetic cover plate and a stator non-magnetic sheath to facilitate the cooling of the control coil, the electromagnetic bias coil, the annular permanent magnet and the like. The magnetic suspension bearing is low in power consumption, capable of being shortly and dynamically overloaded, high in bearing rigidity, wide in damping adjustment range, good in cooling capability, capable of re-magnetizing the permanent magnet, wide in application prospect, and particularly suitable for applications such as a high-temperature environment which requires for the short and dynamic overloading capability of the bearing and possibly causes a permanent magnet performance degradation.

Description

technical field [0001] The invention relates to a magnetic suspension bearing, in particular to a hybrid bias radial magnetic suspension bearing. Background technique [0002] The basic working principle of the magnetic suspension bearing supporting the rotor is to use the control of the magnetic force change between the stator and the rotor core to achieve the purpose of non-contact support of the rotor. [0003] The magnetic suspension bearing mainly has the following advantages: (1) It has no contact, no lubrication and no wear, so that the magnetic suspension bearing can be applied to clean and sterile spaces, vacuum systems, low-temperature environments, and even high-temperature environments; Mechanical wear, the rotor can run at ultra-high speed, theoretically the speed is only limited by the rotor material; (3) its stiffness and damping can be adjusted, so that the supported rotor is controllable; (4) the bearing loss is very low, It is only 1 / 20 to 1 / 5 of tradition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C32/04
Inventor 张鹏飞席光王志恒
Owner XI AN JIAOTONG UNIV
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