速度和供油量对滚动直线导轨副摩擦力的影响  

Influence of Speed and Oil Supply on Friction Force of Rolling Linear Guide

作　　者：张怡雯[1] 欧屹[1] 冯虎田[1] 疏亚雅 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《润滑与密封》2017年第3期119-123,共5页Lubrication Engineering

基　　金：国家科技重大专项(2014ZX04001033)

摘　　要：利用Stribeck曲线和Hamrock-Dowson的最小油膜厚度计算公式,分析速度与润滑油量和摩擦力的关系。分析结果表明:在一定工况下,当速度由小到大变化时,滚动直线导轨副的润滑状态会经历边界润滑、混合润滑和弹流润滑3个阶段,摩擦力先减小后增大;润滑油量越多,直线导轨副在相对较好的润滑状态下工作,摩擦力就越小。通过滚动直线导轨副综合性能试验台,研究速度与润滑油量对滚动直线导轨副摩擦力的影响。结果表明:在高速运行下,速度对摩擦力影响较大;同时在注油量不断增加至注满的过程中,摩擦力大小先急剧变小,然后摩擦力曲线变化趋于平缓,此时的供油量即为最合适的润滑油量。Stribeck curves and the maximum oil film thickness formula of Hamrock-Dowson were used to analyze the re- lationship between the friction force and the speed and oil supply of roiling linear guide.The results show that, under cer- tain conditions, with the increasing of speed, the lubrication of rolling linear guide will experience three phases：boundary lubrication, mixed lubrication and elastohydrodynamic lubrication, and the friction force is decreased first and then in- creased.With more supply of lubricating oil, the linear guides will work in a good lubrication state, and the friction force will decrease.The experiments were carried out on the test bench for comprehensive performance of rolling linear guide to study the influence of speed and oil supply on the friction force of rolling linear guide.It is found that speed has a great impact on friction force under the high-speed operation.With the continuous increases of oil supply, the friction force is decreased quickly first and then the friction force curve becomes flat.The oil supply amount at the flat beginning stage of friction force curve is the optimal lubrication quantity.

关 键 词：滚动直线导轨副 摩擦力 速度 润滑量 

分 类 号：TH117.1[机械工程—机械设计及理论]