Analysis Method of Vibration Spectrum Characteristics Based on Equivalent Bearing Model of Planetary Gear Structure

Abstract

The invention discloses a vibration spectrum feature analysis method based on an equivalent bearing model of a planetary gear structure; it specifically includes the following steps: input the original vibration signal and decompose it by using the lifting wavelet packet transformation method, and calculate and decompose the decomposed frequency band signal of each layer kurtosis value, obtain the kurtosis analysis diagram and select the maximum kurtosis value, obtain the corresponding decomposition frequency band signal and use the Hilbert envelope demodulation analysis method to analyze and obtain the vibration spectrum diagram, and establish an equivalent bearing based on the planetary gear structure The theoretical calculation model of the vibration spectrum characteristics of the model can accurately and quantitatively analyze the fault vibration frequency of each component of the planetary gear transmission system. The invention has the advantages of high precision, simplicity and reliability, and realizes the direct correspondence between the theoretically calculated fault frequency peak and the actual fault frequency peak, thereby accurately characterizing the fault characteristic frequency of each component of the planetary gearbox transmission system.

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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