行星齿轮内齿圈的多柔体动力学分析

Multi-deformable-body dynamics analysis on the ring gear of planetary gear set

以多柔体动力学理论为基础,研究了行星齿轮内齿圈在啮合过程中的动力学行为。构建了基于UG的虚拟样机模型。对系统进行了分析、计算及数值仿真,求解得到轮缘厚度系数与内齿圈应力/应变的定量关系及动应力沿内齿圈的分布规律,并对内齿圈进行了结构优化。结果表明,适当降低内齿圈的轮缘厚度系数,可有效降低振动、冲击与噪声,从而提高机构的疲劳寿命。

Taking the multi-deformable-body dynamics theory as a foundation,the dynamics behaviors of ring gear of the planetary gear set were studied in the process of engagement.The virtual prototype model was constructed on the basis of UG.Analysis,calculation and numerical simulation were carried out on the system.The quantitative relations between coefficients of rim thickness and stress/strain of ring gear and the distribution law of dynamic stress along inner gear ring were obtained by finding the solution,and the structural optimization was carried out on the inner ring gear. The result showed that reducing suitably the coefficient of rim thickness of inner ring gear would bring down effectively the vibration, impact and noise, thus raised fatigue life-span of the mechanism.