An order analysis method for gear failure keyless phase angle domain average calculation

Abstract

The invention provides a gear failure keyless phase angle domain average computing order analysis method. The method comprises the steps that low-pass phase-protection filtering is conducted on collected accelerated speed signals, and time-frequency distribution of the signals is calculated through smooth pseudo Wigner-Ville distribution; the instantaneous frequency of a gear case rotary shaft is estimated according to a Viterbi optimal path search algorithm, key phase signals are used for estimating a model to conduct point-by-point integration on the instantaneous frequency, and an estimated key phase signal is obtained, calculation order analysis is conducted on the vibration accelerated speed signals through equal angle resampling and the angular domain average technology, and the order spectrum based on instantaneous frequency estimation is obtained. The order spectrogram can effectively reflect the feature information of gear case failures. The gear failure keyless phase angle domain average computing order analysis method integrates the advantages of the smooth pseudo Wigner-Ville distribution, the Viterbi optimal path search algorithm, the angular domain average technology and the calculation order analysis, and can effectively conduct fault diagnosis on a gear case working on the working station of variable speeds.

Description

technical field [0001] The invention belongs to the field of gear fault analysis methods, and in particular relates to a gear fault keyless phase angle field average calculation order analysis method. Background technique [0002] The traditional gearbox vibration test and the analysis and test of the test signal are carried out under constant speed and constant working conditions, but the gearboxes in actual work are often operated under variable speed and variable working conditions, such as wind power generators. Gearboxes, helicopter gearboxes, automotive reducers, cranes, etc. Take a crane as an example. The crane is responsible for lifting and transporting the ladle. When working, the gearbox undergoes a process of speed-up, speed-down and dumping. At present, in the calculation order analysis method used under the variable speed operating condition of the gearbox, the key phase signal of the rotating shaft is indispensable for the calculation order analysis of the ge...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a gear fault keyless phase angle domain average calculation order analysis method, which can solve the difficult problem of fault diagnosis under variable speed conditions when the key phase signal cannot be collected

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