考虑范德华力的微型活齿传动系统应力分析

Stress Analysis of Micro Movable Teeth Transmission Systems Considering Van der Waals Force

提出了一种微型集成活齿传动系统,介绍了其工作原理,推导了微尺度下任一活齿在不同啮合位置的静力学方程,利用范德华势函数对活齿所受的范德华力进行求解,研究了考虑范德华力时啮合活齿所受波发生器、活齿架、中心轮三者作用力的变化规律;运用Hertz理论,对活齿与波发生器、活齿架、中心轮的接触应力进行了理论推导,并研究了微结构不同几何参数对活齿所受作用力及接触应力规律的影响。

A micro-integrated movable tooth transmission system was introduced herein and the working principles were introduced. The static equations of any movable teeth at different meshing positions in micro-scale were deduced. The Van der Waals forces on movable teeth were solved by Van der Waals potential functions. The variation of the forces acting on the movable teeth from the wave generator, the movable tooth rack and the center wheel was studied when considering the Van der Waals forces. By using the Hertz theory, the forces of the movable teeth from the wave generator, the contact stress were deduced theoretically and the effects of different geometric parameters of the microstructure on the forces and contact stress of the movable teeth were studied.