支撑轴偏心套自由回转的三环减速器弹性动力学分析

Elasto-dynamics Analysis for a Three-ring-plate Gear Reducer with Freely Rotating Eccentric Sleeves on Supporting Shaft

在考虑高速轴变形、行星轴承变形、输出轴支承轴承变形、齿轮副变形及偏心套误差等因素的基础上,又计入了环板的变形,推导了各变形间的协调条件,建立了支撑轴偏心套自由回转的三环减速器传动系统的弹性动力学方程,求解了系统各环节的受力和固有频率,并与原结构的系统动力学性能作了比较。仿真结果表明,取消支撑轴上的键联接,可以消除该轴上偏心套的微动磨损现象,且一般不会导致系统受力性能的恶化,但是此举会大大降低系统第一阶固有频率。

By considering the deformations of high speed shafts,planetary bearings,housing bearings on output shaft,gearings,and errors of eccentric sleeves as well as ring-plate,the coordination relations between those deformations are derived.An elasto-dynamics model for a three-ring-plate gear reducer with freely rotating eccentric sleeves on supporting shaft is present.By solving the governing equation,loads acting on gears and bearings and natural frequencies of the system can be obtained.The comparison of simulation results between this new structure reducer and traditional one indicates that the freely rotating eccentric sleeves on supporting shaft can eliminate the micro-wearing of eccentric sleeves and does not change the load performance greatly.However,this will greatly reduce the first natural frequency.