叶片摩擦系数对液压凸轮转子伺服马达转矩性能影响  

Impact of Vane Friction Coefficient on Cam-Rotor Motor’s Torque Performance

作　　者：谭顿 陶建峰[1] 陈良深[1] 王旭永[1] TAN Dun;TAO Jianfeng;CHEN Liangshen;WANG Xuyong(School of Mechanical Enginering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学机械与动力工程学院

出　　处：《上海交通大学学报》2020年第2期160-166,共7页Journal of Shanghai Jiaotong University

基　　金：装配预研教育部联合基金资助项目(6141A02022120)

摘　　要：为研究叶片摩擦系数对液压凸轮转子伺服马达转矩性能的影响,建立了马达转矩的力学模型.通过对叶片进行受力分析,推导了叶片/叶片槽之间的摩擦系数与凸轮转子对叶片的正压力以及叶片对凸轮转子的阻力矩的关系式.利用MATLAB对力学模型进行仿真计算.结果表明,叶片/叶片槽之间摩擦系数的增大会减小叶片之间正压力,从而增大叶片对凸轮转子的阻力矩,导致马达的输出力矩出现明显波动.阻力矩的最大值和平均值与摩擦系数基本呈线性关系.减小叶片和叶片槽之间的形位公差与表面粗糙度能够改善伺服马达的低速特性.In order to study the influence of the blade friction coe ficient on the torque performance of the hydraulic canrrotor servo motor,a mechanical model of the vane motor torque is established.By analyzing the force on the vane,the relationship between the positive pressure exerted by the canrrotor on the vane and the friction coefficient between the vane and the vane groove are derived.Based on this,the analytical formula bet ween the friction coefficient and the resistance torque applied by the vane to the cam-rotor is derived.The MATLAB is used to simulate the mechanical model.The results show that the increase of the friction coefficient between the vane and the vane groove will reduce the positive pressure bet ween the vanes,and increase the resist ance torque of the vane to the camrrotor,resulting in significant fluctuation of the motor output torque.The maximum and average values of the resistance torque are roughly linear to the friction cofficient.Reducing the geometrical tolerance and surface roughness between the vane and the vane groove can improve the low speed characteristics of the servo motor.

关 键 词：凸轮转子 叶片马达 阻力矩 低速性能 摩擦系数 

分 类 号：TH137[机械工程—机械制造及自动化]