Gear fault detection method and system of planetary gear box

Abstract

The embodiment of the invention provides a gear fault detection method and system of a planetary gear box. The method comprises the following steps: performing empirical modal decomposition on an acquired gear vibration signal to obtain multiple intrinsic modal components corresponding to the gear vibration signal; determining the preset amount of target component from all intrinsic modal components, and performing signal recombination of the preset amount of target component to obtain a recombined signal; performing band-pass filtering and Hilbert demodulation on the recombined signal to obtain a feature frequency demodulation spectrum of a gear so as to perform the fault detection on the gear according to the feature frequency demodulation spectrum of the gear. Through the gear fault detection method and system of the planetary gear box provided by the embodiment of the invention, the spectrum feature of the gear fault can be extracted through the empirical modal decomposition and the Hilbert demodulation technology, thereby effectively judging the fault information of the gear, and the corresponding processing can be performed in time according to the fault information so as toreduce the loss on the material resources, the financial resources and the manpower aspects.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of signal processing, and in particular, to a gear fault detection method and system for a planetary gearbox. Background technique [0002] The gear is a key working part in the planetary gearbox transmission system, which plays a very important role, and is also one of the parts that are more prone to failure. [0003] For example, gears are prone to wear, scratches, and cracks during operation, and in severe cases, faults such as broken teeth may occur. According to incomplete statistics, the probability of gear failure in rotating mechanical equipment is as high as 60%, and whether its operating status is normal often directly affects the performance of the entire mechanical equipment. [0004] When the gear is partially damaged or defective, it will often cause a lot of noise and abnormal vibration of the equipment, which may eventually cause the entire transmission system to c...

AI Technical Summary

Problems solved by technology

[0004] When the gear is partially damaged or defective, it will often cause a lot of noise and abnormal vibration of the equipment, which may eventually cause the entire transmission system to collapse. In severe cases, it will cause a large accident and cause losses in material, financial and human resources.

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