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

A technology of vibration spectrum and planetary gear, which is applied in the field of analysis of fault vibration spectrum characteristics of various components in the planetary gearbox transmission system, can solve the problems of complex research models of vibration spectrum characteristics of planetary gears, misjudgment of fault locations, etc., and achieve high precision and wide coverage The effect of engineering application prospects

Inactive Publication Date: 2015-07-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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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...

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

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[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0046] like figure 1 As shown, it is a schematic flow chart of the method for analyzing vibration spectrum characteristics based on the equivalent bearing model of the planetary gear structure of the present invention. A vibration spectrum feature analysis method based on an equivalent bearing model of a planetary gear structure, comprising the following steps:

[0047] A. Input the original vibration signal of the planetary gear, and use the lifting wavelet packet transform method to decompose the original vibration signal;

[0048] B, calculate its kurtosis value to every layer of decomposed fr...

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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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Application Information

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IPC IPC(8): G01M13/02
Inventor 刘治汶刘剑锋左明健郭伟
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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