层片状纳米粒子对绿色润滑油润滑特性的影响  

Effects of nanometer flakes on lubricating properties of green lubricant

作　　者：石琛[1] 梁根[1] 毛大恒[1] 

机构地区：[1]中南大学机电工程学院,长沙410083

出　　处：《中国科技论文》2015年第16期1871-1874,1880,共5页China Sciencepaper

基　　金：高等学校博士学科点专项科研基金资助项目(20110162120086);国家自然科学基金资助项目(51205416)

摘　　要：针对绿色植物油高温润滑性能差的问题,通过四球摩擦实验研究了层片状纳米粒子（纳米WS2、纳米MoS2和纳米石墨）在不同工况（温度、负载和速度）下对菜籽油润滑特性的影响。结果表明：层片状纳米粒子可有效提高菜籽油的极压性能和各工况下的抗磨减摩性能,可显著减轻高温下摩擦表面的磨损,改善磨损表面形貌,使磨损表面粗糙度降低75.5%~87.1%,从而延长菜籽油的服役寿命和摩擦副的使用寿命;其中纳米WS2的改善效果最佳,可使最大无卡咬负荷和烧结载荷分别提高13.4%和66.7%,使菜籽油的磨斑直径和摩擦因数在常温（25℃）下分别减小25.8%和8.3%,在高温（250℃）下分别减小48.3%和21.9%,并且含纳米WS2润滑油的抗磨减摩性能随温度、负载和速度的变化幅度最小,这主要缘于纳米WS2具有比纳米石墨更高的金属表面吸附能力,并具有比纳米MoS2更好的耐高温性能。In view of the poor lubricating properties of green vegetable oil at high temperature,effects of nanometer flakes on lu-bricating properties of rapeseed oil under different working conditions were studied through four-ball friction experiments.The results show that nanometer flakes improve lubricating properties of rapeseed oil effectively and alleviate abrasion of friction sur-face,which reduces the surface roughness by 75.5%-87.1%.Thereinto,the improvement effect of nano-WS2 exceeds that of nano-MoS2 and nano-graphite,and nano-WS2 improves the maximum non-seizure load of rapeseed oil by 13.4% and weld load by 66.7%,and reduces the wear scar diameter and friction coefficient by 25.8%,8.3% at 25 ℃ and by 48.3%,21.9% at 250 ℃respectively.In addition,the variation of nano-WS2 oil’s lubricating properties with temperature,load,speed is the smallest.All of these result from the nano-WS2 ’s stronger adsorbability than nano-graphite and better thermostable performance than nano-MoS2 .

关 键 词：植物油 润滑特性 纳米WS2 纳米MoS2 纳米石墨 

分 类 号：TE626.3[石油与天然气工程—油气加工工程]