JS材料在不同介质润滑下的摩擦学特性

作者利用MPV-1500摩擦试验机对JS材料在20#机械油、10#汽油机油、10W30CD柴油机油、甘油及三乙醇胺润滑下的摩擦、磨损及极限Pv性能进行了系统研究.结果发现,以上介质润滑均可大大改善JS材料的摩擦、磨损及极限PV性能,使其摩擦系数比干摩擦时降低2～3个数量级,磨损量降低1～2个数量级,极限PV值则提高1个数量级以上.同时,JS材料在以上五种介质润滑时的极限PV值均大于120MPa·m/s,约为纯PTFE(聚四氟乙烯)轴承极限PV值(干摩擦)的100倍,是巴氏合金轴承在20#机械油润滑时极限PV值的数倍,因而JS材料在以上介质润滑下可以作为高PV值的滑动轴承在实际中应用.

THE TRIBOLOGICAL CHARACTERISTICS OF JS MATERIAL UNDER THE LUBRICATION OF DIFFERENT LUBRICANT MEDIA

The properties of friction,wear and limit PV of JS material under the lubrication of 20# mechanical lubricant oil,lO# gasoline engine lubricant oil,1OW30CD diesel engine lubricant oil,glycerol and triethanolamine were studied using the MPV+1500 friction tester.The results show that the properties of friction,wear and limit PV of JS material are greatly improved with the lubrication of the lubricant mediums above.The friction coefficient is decreased by 2 to 3 orders of magnitude,the wear is decreased by 1 to 2 orders of magnitude,and the limit PV value is increased at least by 1 order of magnitude.The limit PV value of JS material is above 120 MPa·m/s with the lubrication of the 5 kinds of lubricant mediums,it is about 100 times as much as that of pure PTFE bearing(dry friction),and several times of that of babbit metal bearing with the lubrication of 20# mechanical lubricant oil.JS material can be applied in practice as a kind of sliding bearing which has a high PV value under the lubrication of the lubricant mediums above.