级间耦合刚度对两级行星传动系统啮合动载荷的影响分析

Influences of Inter-stage Coupling Stiffness on Dynamic Mesh Forces of Two-stage Planetary Transmission System with Thin-walled Ring Gear on Elastic Supports

将内齿圈视为弹性连续体,弹性支承结构简化为切向和径向刚度约束的弹性基,建立了某混合动力系统中的两级行星齿轮机构在弹性支承下的刚柔耦合混合动力学模型,基于所建模型,采用Runge-Kutta法求解了传动系统的动力学微分方程,研究了级间耦合刚度变化对传动系统啮合动态载荷的影响,研究结果表明:随第Ⅰ级内齿圈与第Ⅱ级行星架间耦合刚度、第Ⅰ级太阳轮与第Ⅱ级太阳轮间耦合刚度的增大,对第Ⅱ级内齿圈与行星齿轮间的啮合动载荷产生不同程度影响,且对第Ⅰ级和第Ⅱ级行星传动各齿轮副间的啮合动载荷波动影响存在较大差异.

The elastic supporting structure is simplified for the tangential and radial stiffness constraints and the thin-walled ring gear is viewed as a standard thin ring. The lumped parameter-rigid elastic coupling dynamic model of two-stage planetary transmission system with thin-walled ring gear on elastic supports is established by the inter-stage coupling method. Based on the method, the dynamic differential equations of the planetary transmission system are solved by the numerical method and the influence of inter-stage coupling stiffness on the dynamic mesh forces of two-stage planetary transmission system with thin-walled ring gear on elastic supports are studied. The results show that there are influences in different degrees on the ring-planet dynamic mesh forces of planet set Ⅱ with the increase of the coupling torsional stiffness of the ring gear of planet set Ⅰ with the carrier of planet set Ⅱ and the coupling torsional stiffness of the sun gear of planet set Ⅰ with the sun gear of planet set Ⅱ, and there is a big difference between each gear pairs of planet set Ⅰ and Ⅱ.