Abstract
Planetary gears should carry equivalent torque through plural pinions in order to design low vibration systems. However, effective equalization methods on load sharing has not been found because the mechanism is far complicated. In present study, alternative numerical analysis method and measurement are developed which can evaluate structural properties and misalignments among components. Contact analysis of gears is conducted by an in-house simulation system of flexible multibody dynamics. Influence of bearing stiffness is investigated to find out factors in load sharing under quasi-static conditions. Some numerical results show that higher bearing stiffness of ring gear improves load sharing since it reduces unnecessary motions of ring gear. Moreover, an adequate support stiffness of carrier is revealed which optimizes both carrier and ring-gear motions. Finally, comparison between numerical and experimental results confirm the adequacy of the numerical method.
