Vibration spectrum feature analysis method based on planetary gear structure equivalent bearing model

Abstract

The invention discloses a vibration spectrum feature analysis method based on a planetary gear structure equivalent bearing model. The vibration spectrum feature analysis method specifically includes inputting an original vibration signal, decomposing the vibration signal according to a lifting wavelet package transformation method, calculating a kurtosis value of each decomposed frequency band signal acquired by decomposition to acquire a kurtosis analysis chart, selecting the maximum kurtosis value, acquiring a corresponding decomposed frequency band signal, analyzing the frequency band signal according to a Hilbert envelope demodulation analysis method to acquire a vibration spectrogram, creating a vibration spectrum feature theoretical calculation model based on the planetary gear structure equivalent bearing model, and analyzing fault vibration frequency of each component of a planetary gear transmission system accurately and quantitatively. The vibration spectrum feature analysis method has the advantages that the vibration spectrum feature analysis method is high in accuracy, simple and reliable; direct correspondence between theoretically calculated fault frequency peak values and actual fault frequency peak values is achieved, and accordingly, fault feature frequency of each component of the planetary gear transmission system is represented accurately.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis and prediction of rotating machinery equipment, and in particular relates to a method for analyzing the fault vibration frequency spectrum characteristics of each component in a planetary gear box transmission system based on an equivalent bearing model of a planetary gear structure. Background technique [0002] Planetary gear transmission system is a key part of mechanical transmission system, which is widely used in aerospace, shipbuilding, wind power generation, engineering machinery and other fields. The planetary gear transmission system usually works in a high-power, high-speed, and high-load working environment. The planetary gear system is prone to tooth surface wear, tooth surface contact fatigue, tooth bending fatigue, and even broken teeth or shaft fractures. Eventually lead to the complete failure of the entire system, resulting in serious economic losses, and even casualties ...

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Problems solved by technology

[0004] The purpose of the present invention is: in order to solve the problem that the research model of planetary gear vibration spectrum characteristics in the prior art is complex and may cause misjudgment of the fault location, the present invention proposes a vibration spectrum characteristic based on the equivalent bearing model of the planetary gear structure Analytical method

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