Method, system and device for detecting cylindricity of inner hole in stator core and storage medium

Abstract

The embodiment of the invention discloses a method, a system and a device for detecting the cylindricity of an inner hole in a stator core and a storage medium. The method comprises the following steps of acquiring a radial vibration signal of a motor, wherein the motor is a motor provided with a rotor with a permanent magnet and a to-be-measured iron core and configured to run according to a preset speed; converting the radial vibration signal from the time domain to the frequency domain so as to obtain a vibration magnitude value of the frequency domain; according to the preset speed, the stage number of the motor and the slot number of the motor, calculating to obtain a first frequency and a second frequency; extracting a vibration magnitude value at the first frequency and a vibrationmagnitude value at the second frequency from the vibration magnitude values of the frequency domain; determining that the cylindricity of the inner hole in the stator core meets the requirement when the vibration magnitude value at the first frequency is smaller than the vibration magnitude value at the second frequency; otherwise, determining that the inner hole in the stator core has the staticeccentricity. According to the technical scheme, the measuring accuracy of the cylindricity of the inner hole in the stator core can be improved.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a method, system, device and storage medium for detecting the cylindricity of an inner hole of a stator iron core. Background technique [0002] The stator and the rotor are the main components of the motor. In order to maintain the gap balance between the stator and the rotor, when the stator core is stacked from the stator laminations, the cylindricity of the inner hole of the stator core needs to be measured. At present, coordinate measuring machines are generally used to measure. [0003] In practical applications, since the inner hole of the stator core is rough, and the coordinate measuring machine is sensitive to the rough surface, the measurement results are usually not accurate enough when the inner hole cylindricity of the stator core is measured by the coordinate measuring machine. If the measurement results exceed the requirements, it may indicate the use of a...

AI Technical Summary

Problems solved by technology

[0003] In practical applications, since the inner hole of the stator core is rough, and the coordinate measuring machine is sensitive to the rough surface, the measurement result is usually not accurate enough when the coordinate measuring machine is used to measure the cylindricity of the inner hole of the stator core

If the measurement results exceed the requirements, it may mean that the stator core with static eccentricity will be used, which will cause problems such as vibration, noise and torque fluctuation of the motor

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