Bending detection method and system for rotating shaft of magnetic suspension bearing

Abstract

The present invention provides a bending detection method and a bending detection system for a rotating shaft of a magnetic suspension bearing. The bending detection system comprises a first displacement sensor, a second displacement sensor and a processor which is connected with the first displacement sensor and the second displacement sensor, wherein the processor comprises a calculation unit, a first judging unit and a second judging unit; the calculation unit is used for calculating detected central positions of different positions where the rotating shaft stops during the process of rotating for one circle; the first judging unit judges whether the rotating shaft bends according to a changing curve of the central position, if not, then outputs a detection result indicating that the rotating shaft is qualified; and the second judging unit judges whether the difference between a maximum value and a minimal value of the central positions is less than a threshold value, if so, outputs a detection result indicating that the rotating shaft is qualified, and if not, outputs detection result indicating that the rotating shaft is not qualified. Therefore, the user can judge whether to handle the rotating shaft according to the detection result of the rotating shaft, so as to avoid devastating impact on a magnetic suspension bearing system due to too large curvature of the rotating shaft.

Description

technical field [0001] The invention relates to the technical field of magnetic suspension, and more specifically, to a method and system for detecting the bending of a rotating shaft of a magnetic suspension bearing. Background technique [0002] Magnetic suspension bearing, also known as electromagnetic bearing or magnetic force bearing, is a new type of high-performance bearing that uses magnetic field force to suspend the bearing in space without mechanical friction and lubrication. After another revolutionary change in the bearing industry, it was hailed as one of the most promising high-tech in the 21st century. [0003] The rotating shaft in the existing magnetic suspension bearing system is supported by the magnetic suspension bearing, which works in a state of no oil and no friction, and runs at a very high speed. Since the rotating shaft is composed of many parts, it is impossible to process the rotating shaft as a whole, which may cause the rotating shaft to bend...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a method and system for detecting the bending of the rotating shaft of the magnetic suspension bearing, so as to detect the bending degree of the rotating shaft and avoid the problem of destructive influence on the magnetic suspension bearing system due to excessive bending of the rotating shaft

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