掘进机截割部行星齿轮传动系统断齿故障仿真分析

Simulation analysis of tooth break fault of planetary gear transmission system in cutting section of roadheader

掘进机截割部在工作过程中承受较大的冲击载荷作用,导致截割减速器齿轮断齿等故障频发。为获取故障状态下截割减速器行星齿轮传动系统动态响应特性,以EBZ120型掘进机截割减速器低速级行星齿轮传动系统为研究对象,运用三维CAD软件SolidWorks建立系统三维实体模型,以ADAMS软件为平台,建立行星齿轮传动系统正常状态、齿圈断齿故障、行星齿轮断齿故障、太阳轮断齿故障的虚拟样机模型。对系统不同状态下的齿圈约束反力的变化规律及其频谱特性进行仿真研究。仿真结果表明:齿圈约束反力的幅值波动显著,具有较强的周期性;故障状态下齿圈约束反力的时域均值增大,时域波形中包含有明显的周期性冲击成分,同时幅值谱中还出现以故障频率为边带的故障特征。

The cutting section of roadheader is often subject to impact load in the working process,which leads to the frequent failure of cutting reducer with tooth break fault.In order to obtain the dynamic response of planetary gear transmission system under fault condition,a 3-D solid model of the low speed planetary gear system of EBZ120 roadheader cutting section was established by SolidWorks software and the virtual prototype of the system under normal state,ring tooth break fault,planetary gear tooth break fault,and the sungear tooth break fault were built based on ADAMS software.The variation law and spectrum characteristics of the restraint reaction force of ring gear under different states of the system are simulated.The simulation results show that the amplitude fluctuation of the restraint reaction force is significant and has strong periodicity.Under the fault condition,the time-domain mean value of the restraint reaction force of ring gear increases,the time-domain waveform contains obvious periodic impact components,and the fault characteristics with fault frequency as side band appear in the amplitudespectrum.