考虑齿距累积误差的人字齿轮系统动态特性分析

Based on Timoshenko beam theory and the finite element method, introducing time-varying meshing stiffness and composite meshing error, the dynamic model of a double-helical gear system was established to study effects of accumulative pitch error on dynamic characteristics of the system. The results showed that accumulative pitch error makes dynamic transmission error have significant shaft frequency and sideband frequency components; when load torque is smaller, sideband frequency components are larger than meshing frequency and its harmonics components ones; with increase in load torque, meshing frequency and its harmonics components gradually increase; when accumulative pitch errors have different phases, the system have obvious axial movement phenomenon, and accumulative pitch error's phase difference affects system vibration significantly; adjusting phase difference can remarkably reduce system vibration; the study results can provide a theoretical basis for low noise design, processing and assembly of double helical gear systems.