基于参数对比的凸轮转子伺服马达优化设计

摘要

针对目前用于连续回转伺服驱动的液压马达品种类型不多的特点，对一种新型的凸轮转子叶片马达进行了研究，提出了基于参数对比的伺服马达优化设计方法。通过对过渡曲线压力角、马达排量公式、马达瞬时流量脉动率以及凸轮正压力的解析式推导及分析，得出了压力角与凸轮大小半径、马达排量与凸轮轴向长度、流量脉动率与叶片厚度以及凸轮正压力与叶片径向长度之间的关系。通过仿真时的参数对比，得到了马达最关键的两个零件即凸轮转子和叶片的优化参数。基于该优化参数设计的液压凸轮转子叶片马达被成功地应用到连续回转电液伺服系统中，并得到了良好的伺服精度，从而证明了马达参数优化设计的可行性和有效性。%Because the type of hydraulic motor using for continuous revolving servo drive is not so much, research on a novel cam-rotor vane motor was carried out and an optimal design theory based on parameter comparisons was proposed herein. The relationships among the press angle and the cam ra-dius, the motor displacement and the axial length of cam, the flow fluctuation rate and vane thick-ness, the positive pressure of the motor’s cam and the radial length of vane were obtained based on the analytical derivation and analyses of pressure angle of transition curve, motor’s displacement for-mula, motor’s instantaneous flow fluctuation rate and positive pressure of the motor’s cam. Opti-mized parameters of cam-rotor and vane which were the most important parts of the motor were ob-tained from the simulation comparisons of different parameters. The hydraulic servo cam rotor vane motor designed with the optimized parameters is successfully applied to the continuous revolving elec-tro-hydraulic servo system and shows a very good servo precision, proves the feasibility and effective-ness of the optimal design theory herein.