Annular magnetic pole structure and axial magnetic bearing provided with same

Abstract

The invention discloses an annular magnetic pole structure and an axial magnetic bearing provided with the same. The annular magnetic pole structure comprises an inner magnetic pole and an outer magnetic pole of an iron core, wherein the inner magnetic pole and the outer magnetic pole are cylindrical, the inner magnetic pole is arranged inside the outer magnetic pole, at least one annular groove is formed in at least one of the end faces of the inner magnetic pole and the outer magnetic pole, and a concentric annulus structure is formed by the grooves in the end faces of the inner magnetic pole and the outer magnetic pole. The annular magnetic pole structure has the advantages that the radial force and radial stiffness of the axial magnetic bearing are improved remarkably, and the radial force and radial stiffness of the axial magnetic bearing can be adjusted by adopting the annular structure for the inner magnetic pole, or adopting the annular structure for the outer magnetic pole, or adopting the annular structure for both the inner magnetic pole and the outer magnetic pole.

Description

technical field [0001] The invention relates to a magnetic suspension bearing structure, in particular to an annular magnetic pole structure and an axial magnetic bearing with the annular magnetic pole structure. Background technique [0002] Magnetic suspension bearing is a new type of electromechanical integrated bearing that supports the rotor to suspend at the set position in space through the magnetic force between the stator and rotor. Because there is no mechanical contact between the rotor and the stator, there is no wear, which greatly reduces mechanical energy consumption and noise, and does not require lubrication, no oil pollution, long service life, and is suitable for special environments such as high speed and vacuum. In recent years, magnetic suspension bearings have been successfully applied to machine tools, centrifugal compressors, vacuum molecular pumps, artificial hearts and other equipment internationally. [0003] The traditional five-degree-of-freedo...

AI Technical Summary

Problems solved by technology

[0004] The radial bearing capacity of traditional axial magnetic bearings is small. In the system where axial magnetic bearings provide radial suspension force, it is difficult to withstand large disturbance forces in the radial direction; the radial stiffness is low, and it is difficult to return quickly after radial displacement. to balance position

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