冲击工况下行星齿轮系统点蚀故障评估方法  

Evaluation Method for Pitting Failure of the Planetary Gear System Under Impact Conditions

作　　者：傅博伟 杨杰[1] 刘英辉 冯国金 甄冬[1] Fu Bowei;Yang Jie;Liu Yinghui;Feng Guojin;Zhen Dong(School of Mechanical Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学机械工程学院,天津300401

出　　处：《机械传动》2024年第1期82-88,共7页Journal of Mechanical Transmission

基　　金：国家自然科学基金项目(52275101);天津市科技计划项目(21JCZDJC00720,22YDTPJC00010)。

摘　　要：行星齿轮系统作为工业减速机的关键结构,在运转过程中受到循环载荷和冲击载荷的作用,易使齿轮表面金属疲劳剥落,形成点蚀故障。当系统受到冲击载荷作用时,振动信号的剧烈波动会干扰系统的故障识别。针对该问题,基于冲击工况下含点蚀故障的行星齿轮系统动态特性分析,开发了诊断指标。首先,基于解析几何方法及Hertz接触理论建立了齿轮副接触刚度模型;其次,引入冲击载荷,利用冲击函数法求解了太阳轮-行星轮啮合力;最后,基于系统动态响应信号的频谱分布规律,提出了边带质心能量指标,实现了故障冲击与载荷冲击的准确辨识。As the key structure of industrial reducers,the planetary gear system will be subject to cyclic load and impact load during the operation,which will cause metal fatigue peeling off the surface of gears and form pitting fault.When the system is subject to the impact load,the severe fluctuation of vibration signal will disturb the fault identification of the system.To solve this problem,a diagnostic index is developed based on the dynamic characteristics analysis of the planetary gear system with pitting fault under impact conditions.Firstly,the contact stiffness model of gear pairs is established based on the analytic geometry method and the Hertz con⁃tact theory.Secondly,the impact load is introduced,and the contact force between sun gears and planet gears is solved by the impact function method.Finally,based on the spectrum distribution of the system dynamic re⁃sponse signal,the energy index of the sideband centroid is proposed,which realizes the accurate identification of the fault impact and the load impact.

关 键 词：冲击载荷 行星齿轮 动态响应 点蚀故障 损伤估计 

分 类 号：TH132.425[机械工程—机械制造及自动化]