考虑油膜阻力的直线滚动导轨副摩擦力建模与试验  

Modeling and experimentation of the friction force of linear rolling guide pair considering oil film resistance

作　　者：张巍[1,2] 王民 孔德顺 ZHANG Wei;WANG Min;KONG De-shun(Advanced Manufacturing Technology of the Key Laboratory of Beijing Municipality, College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China;Engineering Training Center, Inner Mongolia University of Science and Technology, Baotou 014010, China)

机构地区：[1]北京工业大学机械工程与应用电子技术学院先进制造技术北京市重点实验室,北京100124 [2]内蒙古科技大学工程训练中心,包头014010

出　　处：《工程科学学报》2017年第11期1718-1726,共9页Chinese Journal of Engineering

基　　金：国家自然科学基金资助项目(51505012;51575014);国家科技重大专项资助项目(2012ZX04010-021-04);北京市自然科学基金资助项目(3154029;KZ201410005010);中国博士后基金资助项目(2016M591033);北京市博士后研究基金资助项目(2015ZZ-13);内蒙古科技大学创新基金(2015XYPYL01)

摘　　要：为了准确预测直线滚动导轨副的摩擦力大小及受影响因素,本文考虑导轨副的流体润滑状态,基于Hertz接触理论研究了直线导轨副摩擦力受滚珠接触角和预紧力的影响规律.基于接触理论建立了直线导轨滑块的受垂直载荷的静力学平衡方程.利用Hertz接触理论分析直线滚动导轨受外力时各列滚珠接触力的变化情况,并结合对临界载荷的分析,建立了随外载荷变化的考虑润滑油膜阻力的直线滚动导轨副摩擦力模型.以国产某型号直线滚动导轨副为研究对象,对所建立的受载摩擦力模型进行试验验证.通过试验数据与理论数据的分析和对比,验证了润滑油膜阻力、接触角和预紧力等因素对直线导轨副摩擦力的影响规律.研究表明,直线滚动导轨副摩擦力在润滑条件下,受接触角变化和预紧力退化的影响呈现有规律的变化.For an accurate prediction of the friction experienced by the linear rolling guide and the factors affecting it,the fluid lubrication state of the rail was considered,and the effect of the friction of the linear guide on the ball contact angle and preload was studied based on the Hertz contact theory. Based on the Hertz contact theory,the static equations and the ball-raceway contact mechanics equations of the linear rolling guide were established for vertical loading. Using the Hertz contact theory,changes in the ball contact force of the linear rolling guide were analyzed. Combining the analysis of the critical load and the oil film obstruction between the balls and the rail,a friction model was established for studying the effect of the external load. Experiments were carried out on a domestic model of the linear rolling guide to validate the developed friction model. Through the analysis and comparison of the experimental and theoretical data,the influence of the resistance of the lubricating oil film,the contact angle,and the preload on the friction of the linear guide were verified. The results show that the friction of the linear rolling guide,under the condition of lubrication,is affected by the contact angle and the preload force.

关 键 词：直线滚动导轨副 赫兹接触 摩擦力 接触角 油膜阻力 

分 类 号：TH123.1[机械工程—机械设计及理论]