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Crack failure study of planetary gear mechanism based on rigid-flexible coupling dynamics model

Published:2022-09-22 author:LIU Bo, GUAN Pin-wu, WANG Si-yuan Browse: 714 Check PDF documents

Crack failure study of planetary gear mechanism based

on rigid-flexible coupling dynamics model

LIU Bo1, GUAN Pin-wu2, WANG Si-yuan3

(1.Chengdu College of University of Electronic Science and Technology of China, Chengdu 611731, China;

2. SAIC-GM-Wuling Automobile Co.,Ltd., Liuzhou 545000, China; 3.School of Mechanical and

Electrical Engineering,

Wuhan University of Technology, Wuhan 430070, China)

Abstract: The crack fault of planetary gear mechanism was difficult to diagnose. In order to better diagnose the crack fault of planetary gear mechanism, taking a certain type of automobile planetary gear mechanism as an example, based on the rigid-flexible coupling dynamic model of the mechanism, the characteristics of the spectrogram of the planetary gear crack fault signal were studied. Firstly, the three-dimensional model of planetary gear crack fault of planetary gear mechanism was established by using SolidWorks software, the ANSYS APDL software was used to set the part where the sensor needed to be arranged as a flexible body. Secondly, based on the ADAMS software, the rigid-flexible coupled dynamic simulation model was carried out. Then, through the meshing static analysis of gear crack fault in ANSYS Workbench software, the planetary gear crack fault model was established. Finally, the signal characteristics of the planetary wheel crack failure model of the planetary gear mechanism were analyzed and obtained through the rigidflexible coupling dynamics simulation. The research results show that, in the planetary gear crack fault spectrum, the peak values of the signal are all corresponding to the meshing frequency or its multiplier, and the local peak values at the meshing frequency are all related to the planetary gear fault frequency.

Key words: planetary gear mechanism; planetary gear crack failure; rigidflexible coupling; dynamics simulation model;ring gear flexible body;fault spectrum

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