Radial magnetic bearing and sensor bracket split structure

Abstract

The invention discloses a radial magnetic bearing and sensor bracket split structure. The radial magnetic bearing and sensor bracket split structure comprises a radial magnetic bearing, a displacement sensor, a magnetic bearing bracket and a sensor bracket, wherein both the magnetic bearing bracket and the sensor bracket are of circular structures, the sensor bracket is coaxially arranged in the magnetic bearing bracket, magnetic poles of the radial magnetic bearing are fixed to the interior of the magnetic bearing bracket, and the displacement sensor is installed on the inner circular surface of the sensor bracket. The displacement sensor and the magnetic poles of the radial magnetic bearing are installed in the same component and can be integrally assembled and disassembled, therefore, the concentricity of the displacement sensor and the radial magnetic bearing cannot be changed by repeated disassembly and assembly of the radial magnetic bearing, and the control program of the magnetic bearing can be simplified. Additionally, the sensor and the sensor bracket can be separately removed from the assembly and can be replaced together, so that the production efficiency is improved, and the maintenance time and maintenance cost are reduced.

Description

[0001] Technical field: [0002] The invention relates to a split structure of a radial magnetic bearing and a sensor bracket. [0003] Background technique: [0004] Active magnetic bearing is a closed-loop control system. It needs to detect the position of the rotor through the sensor, and then adjust the current of the magnetic pole coil to control the magnetic force so that the rotor that deviates from the position returns to its proper position. Therefore, in the radial magnetic bearing, it is necessary to arrange a ring of magnetic poles and a ring of sensors around the rotor for output and detection respectively. [0005] In the common radial magnetic bearing structure, the magnetic bearing and the sensor are respectively installed on the casing, so the concentricity of the two is poor. [0006] What the sensor actually detects is the gap between the inner ring surface of the sensor bracket and the rotor, and the suction force of the magnetic bearing has a lot to do wi...

AI Technical Summary

Problems solved by technology

[0009] 1) The process of installing the sensor on the sensor bracket is very fine, and factors such as assembly stress and assembly temperature may cause changes in the accuracy of the sensor, so the yield is low

However, the final detection of the sensor needs to be completed on the magnetic bearing assembly, so once the sensor is found in the monolithic structure, the entire magnetic bearing

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