叶片摩擦系数对液压凸轮转子伺服马达转矩性能影响

doi:10.16183/j.cnki.jsjtu.2020.02.007

摘要/Abstract

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.

关键词: 凸轮转子；叶片马达；阻力矩；低速性能；摩擦系数

Abstract: In order to study the influence of the blade friction coefficient on the torque performance of the hydraulic cam-rotor 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 cam-rotor on the vane and the friction coefficient between the vane and the vane groove are derived. Based on this, the analytical formula between 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 between the vanes, and increase the resistance torque of the vane to the cam-rotor, resulting in significant fluctuation of the motor output torque. The maximum and average values of the resistance torque are roughly linear to the friction coefficient. Reducing the geometrical tolerance and surface roughness between the vane and the vane groove can improve the low speed characteristics of the servo motor.

Key words: cam-rotor; vane motor; resistance torque; low speed performance; friction coefficient

中图分类号:

TH 137

谭顿,陶建峰,陈良深,王旭永. 叶片摩擦系数对液压凸轮转子伺服马达转矩性能影响[J]. 上海交通大学学报, 2020, 54(2): 160-166.

TAN Dun，TAO Jianfeng，CHEN Liangshen,WANG Xuyong. Impact of Vane Friction Coefficient on Cam-Rotor Motor’s Torque Performance[J]. Journal of Shanghai Jiaotong University, 2020, 54(2): 160-166.

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