考虑信号传递路径的行星齿轮传动太阳轮裂纹故障响应分析

Crack fault response analysis of sun wheel in planetary gear drive considering signal transmission path

为研究振动信号传递路径对行星齿轮传动系统太阳轮裂纹故障响应的影响,采用有限元法建立齿圈结构动力学分析模型,对比分析了考虑与未考虑传递路径的齿圈振动响应,验证了模型中传递路径的时变效应以及模型的有效性。开展了太阳轮裂纹故障试验,采用快速谱峭度法(Fast Spectral Kurtosis,FSK)对实验信号进行降噪以及故障特征提取,验证了太阳轮裂纹故障仿真结果的准确性。结果表明:仅考虑与太阳轮故障齿啮合的行星轮的传递信号时,故障信号在路径中的传递随距离增加呈现不断衰减趋势;当考虑所有行星轮的传递信号时,故障信号出现调制现象,随传递距离增加呈现衰减或增加趋势。

In order to study the influence of vibration signal transmission path on the fault response of sun gear crack in planetary gear transmission system,a dynamic analysis model of ring gear structure is established by finite element method,and the vibration responses of ring gear with and without transmission path are compared and analyzed,which verifies the time-varying effect of transmission path in the model and the validity of the model.The solar wheel crack fault test is carried out,and the fast spectral kurtosis(FSK)method is used to reduce noise and extract fault features of the experimental signal,which verifies the accuracy of the simulation results of solar wheel crack fault.The results show that the transmission signal of planetary wheel which only engages with the faulty teeth of the sun gear is considered,and the transmission in the path decreases with the increase of distance.When considering the transmission signals of all planetary wheels,the fault signal appears modulation,which tends to decay or increase with the transmission distance.The research results can provide theoretical basis and reference for fault diagnosis of planetary gear transmission system.