封闭行星轮系结构复杂，载荷的均匀分配对于提高系统的传动质量及使用寿命具有重要意义，齿面摩擦对封闭行星轮系均载特性有重要的影响。以人字齿封闭行星轮系为研究对象，以基于弹流润滑理论的摩擦系数模型为基础，考虑人字齿轮两端斜齿轮扭转振动的相互影响，建立了考虑齿面摩擦的人字齿纯扭转动力学模型。分析考虑齿面摩擦(EHL)和不考虑齿面摩擦情况下封闭行星轮系振动位移响应及输入转速、输入功率和摩擦系数变化对均载特性的影响。结果表明：系统均载系数随着输入转速的增加而增加，随着输入功率的增加而减小，随着摩擦系数的增加有微幅的增加。

Encased Planetary Train has a complicated structure,and the load sharing is of great significance to improving the transmission quality and service life of it. The tooth friction has important influence on the load sharing characteristics of the system. The research object of this paper is an encased planetary train with double helical tooth. Pure torsion kinetic differential equations considering tooth friction were established based on elastohydrodynamic lubrication theory,and the interaction of the right and left sides of the double helical tooth were considered. The vibration displacement response of an encased planetary train was studied with and without considering tooth friction( EHL). The load sharing characteristics for different input speed,input power and friction coefficient were analyzed. The study results show that the load sharing coefficient will increase with the power and the friction coefficient and reduce with the increase of the input speed. The results show that the system load sharing increases with the input speed,decreases with the increase of input power,and increases slightly with the friction coefficient.

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