偏心误差对新型行星齿轮传动系统均载特性的影响

Impacts of Eccentric Error on Load Sharing Characteristics of New Type Planetary Gear Train

针对微小型行星齿轮传动系统存在传动精度低、承载性能差、载荷分配不均的问题,提出微小型行星轮双排并联多模数齿轮传动系统模型;基于弹性力学分析法,建立偏心误差对齿轮传动系统弹性形变的关系,推导出传动系统载荷分配系数公式,研究了偏心误差对该传动系统载荷分配系数的影响。研究结果表明:在偏心误差作用下,汇流级均载系数小于分流级,汇流级均载性能优于分流级;行星架作为连接分流级与汇流级的重要部件,其偏心误差对分流级、汇流级的均载系数影响均比同级其他偏心误差影响大;双排行星轮啮合齿数极剧增大,误差补偿效果很好,平衡了载荷,行星轮偏心误差对分流级、汇流级的均载性能影响最小。

In view of the existing problem of low transmission precision,poor bearing capacity and uneven distribution of load on micro planetary train,a micro multi-modulus gear train of double row parallel planetary was proposed.Based on elastic mechanics analysis,the relationship between the eccentricity error and the elastic deformation of the gear train was established,and the load sharing coefficient formula of the gear train was derived.Besides,the impact of the eccentric error on the load sharing coefficient of the gear train was studied.The research results show that with the function of eccentricity error,the load sharing coefficient of the confluence stage is less than the shunt stage,and the load sharing characteristic of the confluence stage is better than that of the shunt stage.The planetary frame is an important connection of shunt stage and confluence stage,and its eccentricity error has greater impact on the load sharing coefficient of the shunt and confluence stage than the other eccentric errors at the same stage.The number of meshing teeth of the double row planetary gear is greatly increased,the error compensation effect is very good and the load is balanced,so the eccentricity error of the planetary gear has the minimum impact on the load sharing characteristic of the shunt and confluence stage.