介绍了一种新型凸轮转子叶片马达的结构特点及工作原理.通过平行平板间隙流动模型及平行圆盘缝隙径向流动模型建立了该马达的泄漏数学模型，从而得出马达液膜厚度与容积效率间的关系.通过绝对黏度模型分析计算了凸轮与隔板及定子两关键摩擦副之间的摩擦力矩，从而得出马达液膜厚度与机械效率之间的关系.基于某三轴无磁仿真转台的凸轮转子叶片马达实例分析，综合考虑马达的容积效率和机械效率得出了使马达总效率最高的最优液膜厚度.研究结果为该类叶片马达的关键摩擦副之间液膜厚度优化设计提供了理论依据，从而可对马达设计及加工过程中凸轮转子、定子及隔板等关键零件提出相应的尺寸精度、几何精度及表面粗糙度等要求.
A new kind of cam-rotor vane motor is introduced with its working principles and features. Motor’s leakage models are established based on the clearance flow model between parallel flats and parallel plates. Therefore, the relationship between motor’s liquid film thickness and volumetric efficiency is obtained. The relationship between motor’s thickness of liquid film and mechanical efficiency is obtained by the analysis and calculation of the friction torque between motor’s two critical friction pairs based on the absolute viscosity model. Based on analysis on the motor of a three-axis non-magnetic turntable system, the optimal liquid film thickness leading to motor’s maximum total efficiency is obtained by synthesizing the effect of volumetric efficiency and mechanical efficiency. The significance of the study is to provide the theoretical basis for the subsequent optimization of liquid film thickness of vane motor’s critical friction pairs. Furthermore, the dimensional precision, geometric precision and surface roughness of the key components such as cam rotor, stator and clapboard can be put forward in the process of design and manufacture of cam-rotor vane motor.
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