Heteropole type octupole radial electromagnetic suspension bearing

Abstract

A heteropole type octupole radial electromagnetic suspension bearing comprises a bearing seat, a stator and a rotor; the rotor is located in an inner hole of the stator which is composed of eight mutually-independent electromagnets, the eight electromagnets are arranged at equal-arc intervals and located on the same installation plane, and magnetic poles of the eight electromagnets are arranged on the same cross section in the radial direction; eight electromagnet installation grooves are formed in an inner hole in the inner side of the bearing seat in an equal-arc mode, all electromagnets correspond to the electromagnet installation grooves in a one to one mode, and eight electromagnet installation grooves are formed in an inner hole of the inner side of a first bearing end cover in an equal-arc mode; the electromagnet installation grooves in the first bearing end cover correspond to the electromagnet installation grooves in the bearing seat in a one to one mode, and electromagnet installation cavities are formed; and the electromagnets are located in and assembled with the electromagnet installation cavities in an interference mode, and the first bearing end cover and the bearing seat are fixed together. According to the heteropole type octupole radial electromagnetic suspension bearing, the size is reduced, eddies are reduced, and machining is simplified.

Description

technical field [0001] The invention relates to the field of magnetic bearings, in particular to a heteropolar eight-pole radial electromagnetic suspension bearing. Background technique [0002] Electromagnetic suspension bearings make the rotor and stator of the bearings in a relative suspension state through electromagnetic force; therefore, electromagnetic suspension bearings exhibit many advantages, such as: no lubrication, no friction / wear, low noise, suitable for high-speed and ultra-high-speed operation occasions . Magnetic suspension bearings have been widely used in aerospace, precision instruments, high-speed and high-precision CNC machine tools and other fields. [0003] Electromagnetic suspension bearings are mainly divided into three categories: ① passive magnetic bearings ② active magnetic bearings ③ hybrid magnetic bearings. The electromagnetic control part of the electromagnetic suspension bearing controls the stiffness and damping of the magnetic poles by ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of existing magnetic bearings such as large volume, large eddy current, and complex processing, the present invention provides a heteropolar eight-pole radial electromagnetic suspension bearing with reduced volume, reduced eddy current, and simplified processing.

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