精密滚珠丝杠副摩擦力矩平稳性的研究  

Research on the Stabilization of Friction Torque of Precision Ball Screws

作　　者：张佐营[1] 宋现春[2] 李志[1] 崔增柱[1] 

机构地区：[1]徐州工程学院,徐州221008 [2]山东建筑大学,济南250100

出　　处：《中国机械工程》2009年第22期2722-2726,共5页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50675124)

摘　　要：考虑滚珠丝杠副中滚珠与滚道接触处的误差对接触载荷的影响,分析了滚道加工误差对滚珠丝杠副摩擦力矩的影响,提出了该误差对摩擦力矩影响的平均效应观点。实验分析了内循环式、外循环插管式和外循环端部偏转式3种不同结构滚珠丝杠副的摩擦力矩特性,实验研究了润滑介质对滚珠丝杠副摩擦力矩平稳性的影响。研究发现,脂润滑时可以消除滚珠丝杠副摩擦力矩的归一化频率1Hz的波动。分析认为滚珠丝杠副摩擦力矩归一化频率1Hz的波动是因润滑不良情况下滚珠之间的拥堵和散开而导致的。Taking into account the influence of the error in the contact points of balls and the groove on the contact force, the influence of manufacturing errors of grooves on friction torque was analyzed. The view point that the manufacturing errors of groove in ball screw mechanism affect the value of the friction torque averagely was brought forward. The characteristics of fiction torque of three type ball screws including innerreturn type, return pipe type and end cap type was investigated through the friction torque test. The influence of lubrication on the stabilization of fiction torque of ball screws was also investigated through the tests. It is found that the fluctuation of the friction torque at the normal frequency of 1Hz can be eliminated completely when the ball screw mechanism is lubricated by grease. Analysis indicates that the fluctuation of the friction torque at the normal frequency of 1Hz is resulted from the jam and fall off of balls because of poor lubrication.

关 键 词：精密滚珠丝杠副 摩擦力矩 平稳性 润滑 

分 类 号：TH132.1[机械工程—机械制造及自动化] TH117