PTFE粉末颗粒流润滑方式下的润滑性能  

Lubrication Performance of PTFE Particle Flow Lubrication

作　　者：王志爽 李颂华 孙健[1] 隋阳宏 马超 张馨艺 WANG Zhishuang;LI Songhua;SUN Jian;SUI Yanghong;MA Chao;ZHANG Xinyi(School of Mechanical Engineering,Shenyang Jianzhu University,Shenyang Liaoning 110168,China;National Engineering Laboratory of High-Grade Stone Material Numerical Control Machining Equipment and Technology,Shenyang Jianzhu University,Shenyang Liaoning 110168,China)

机构地区：[1]沈阳建筑大学机械工程学院,辽宁沈阳110168 [2]沈阳建筑大学高档石材数控加工装备与技术国家地方联合工程实验室,辽宁沈阳110168

出　　处：《润滑与密封》2022年第9期86-91,共6页Lubrication Engineering

基　　金：国家自然科学基金项目(51975388,52105196);辽宁省自然科学基金项目(2019-MS-266,2019-ZD-0666,2020-BS-159)。

摘　　要：为探究颗粒流润滑方式下聚四氟乙烯(PTFE)粉末的润滑减磨性能,在不同载荷及干摩擦和PTFE粉末润滑条件下进行氮化硅摩擦副摩擦磨损实验,分析不同载荷下PTFE粉末润滑对试样摩擦学特性的影响,通过扫描电子显微镜(SEM)和能量色散X射线能谱仪(EDS)分析试样在不同润滑条件下的磨损及润滑机制。结果表明:PTFE粉末润滑条件下的摩擦因数要明显低于干摩擦条件下的摩擦因数,且在实验时间内PTFE粉末保持润滑持续稳定;在滑动摩擦过程中,PTFE粉末由于压力作用,形成一层转移膜粘附在试样表面,使摩擦因数处于一个持续较低的状态,对试样起到良好的润滑和保护作用;随着载荷增加,转移膜的覆盖面积和连续性先变好后变差,导致在PTFE粉末润滑条件下的摩擦因数也先降低后升高。因此,颗粒流润滑方式下PTFE粉末具有良好的润滑和减磨效果,具有十分广泛的应用前景。In order to investigate the lubrication and wear-reducing performance of polytetrafluoroethylene(PTFE)particle flow lubrication,the friction and wear tests of Si_(3)N_(4) friction pairs under dry friction and PTFE powder lubrication were carried out under different loads.The influence of PTFE powder lubrication the tribological characteristics of the samples under different loads was analyzed.The wear and lubrication mechanism of the samples under different lubrication conditions were analyzed by SEM and EDS.The results show that the friction coefficient under PTFE powder lubrication is obviously lower than that under dry friction condition,and PTFE powder keeps stable lubrication during the experimental time.In the sliding friction process,PTFE powder forms a layer of transfer film adhering to the surface of the sample due to the action of pressure,so that the friction coefficient is in a continuous low state,which plays a good lubrication and protection role for the sample.With the increase of the load,the covering area and continuity of the transfer film become better and then worse,leading to the friction coefficient under PTFE powder lubrication decreases first and then increases.Therefore,PTFE powder under particle flow lubrication has good lubrication and wear-reducing effect,and has a very wide application prospect.

关 键 词：PTFE粉末润滑 润滑性能 摩擦因数 转移膜 

分 类 号：TH117.2[机械工程—机械设计及理论]