封闭行星齿轮传动系统的动态特性研究

建立了封闭行星齿轮传动系统的动力学计算模型，模型中考虑了行星轮和星轮的啮合相位，行星架的弹性变形，轮系的弹性耦合和负载惯性。用数值解法获得了系统在时变啮合刚度、偏心误差和齿频综合误差激励下的动态响应和动载荷系数的频域历程。分析了在星型轮系和行星轮系动力耦合情况下，齿轮系统的动态特性以及行星轮和星轮的载荷分配均匀性。对比了中心轮在不同的输入转速下的浮动轨迹，得出了对封闭行星齿轮传动设计有意义的结论。

STUDY ON DYNAMIC BEHAVIOR OF ENCASED DIFFERENTIAL GEAR TRAIN

A torsional and translational vibrory model excited by time-varying mesh stiffness and composite gear errors is established to predict the dynamic characteristics of encased differential gear train. The run-out errors are also included in the analysis. A numerical method is applied to solve the large parametrically excited differential system. From the numerical results, it is concluded that the load equalization on each power branch can be not achieved with floating the center-gears in the high speed region. The locus of the center-gears appears that the predominant mode of vibration of center-gears transit from translational mode to rotational mode of vibration. At the time of the occurrence of the resonance in the system work-speed range, the dynamic load of the planetary gear train is much more largely influenced than that of the star gear train.