Influence of crack fault on the dynamical characteristics of a planetary gear transmission system

被引：0
|
作者：
Xiao Z. [1 ]
Xun L. [1 ]
Cao J. [1 ]
机构：
[1] Faculty of Mechanical & Electrical Engineering, Kunming University of Science and Technology, Kunming
来源：
| 1600年 / Chinese Vibration Engineering Society卷 / 39期
关键词：
Dynamical response; Fault test; Gear crack fault; Influence; Planetary gear transmission;
D O I：
10.13465/j.cnki.jvs.2020.02.026
中图分类号：
学科分类号：
摘要：
In view of the complex dynamic characteristics and high failure rate of planetary gearboxes, the failure mechanism of a transmission system was explored from the aspect of dynamics. The modified energy method was used to simulate the time-varying meshing stiffness of normal and cracked gears. The dynamic model of the planetary gear transmission system was established by using the lumped parameter method and considering the time-varying meshing parameters. The dynamical responses of the system in the normal and fault gear states were obtained, and the influence of crack failure on its dynamical characteristics was analyzed. The influence of crack fault on the dynamic responses of the planetary gears was investigated by gearbox bench tests. The frequency spectrum of the gear vibration signal was analyzed with the wavelet decomposition and EEMD method. The frequency domain characteristics of the system in the normal and fault gear states were compared, according to which the fault mechanism of the planetary gear transmission system was revealed. The results show that the dynamical model has high precision and can well describe the dynamic characteristics of the planetary gears system with faults. The modulation effect of the vibration of the transmission system caused by crack fault will lead to the sidebands near the gear meshing frequency, and the vibration energy of the fault gearbox is mainly concentrated in high frequency region. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：188 / 194
页数：6
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