行星传动系统因误差变形影响，其各支路载荷分配并不均匀，波动冲击频繁，易发偏载与应力集中，交变重载强冲击的极端工况下越发凸显。针对交变重载恶劣工况，现有行星系统性能改善及寿命提升手段收效甚微。本文结合国外键式齿圈构型提出浮动柔性齿圈，其由内外双圈构成，内圈为薄壁结构，内圈与外圈间通过凸键键槽实现周向运动约束与径向滑移，采用间隙实现浮动调节和过载保护，其内圈强柔性可实现系统各支路载荷分配均衡的同时吸收动能以改善动载。研究表明，浮动柔性齿圈较全固定齿圈、L型齿圈在均载性能和动载性能方面均有提升，可为行星传动系统齿圈设计提供理论指导。

Due to the influence of deformation, the load distribution of planetary transmission system is not uniform, and the wave shock is frequent, which is prone to unbalance loading and stress concentration, and the extreme condition of alternating heavy load and strong impact become more and more prominent. The existing methods to improve the performance and prolong the life of planetary systems have little effect on the harsh conditions of alternating heavy loads. In this paper, the floating flexible ring gear is proposed based on the foreign key-type ring gear, which is composed of inside ring and outside ring, the ring gear is a thin-walled structure, and the circumferentially restricted motion and radial slip are realized between the inner ring and outer ring through a convex key, and the clearance is used to realize floating adjustment and overload protection. The strong flexibility of inner ring can realize the unbalance loading of system each branch and absorb kinetic energy to improve the dynamic load. The analysis shows that floating flexible ring gear has improved the load sharing and dynamic load performance significantly compared with the full fixed ring gear and L-shaped ring gear, which can provide theoretical guidance for the ring gear design of planetary transmission system.

国家自然科学青年(52305045; 52005402; 52105060)；安徽省高校科研研究项目-重点项目(2023AH051224)；中国博士后科学基金资助项目(351197).