纳米坡缕石改进水润滑轴承性能的研究  

Study on Nano-palygorskite Improving upon Performance of Water-lubricated Bearing

作　　者：王家序[1,2] 潘阳[1] 李俊阳[1] 肖科[1] 周广武[2] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400030 [2]四川大学空天科学与工程学院,四川成都610065

出　　处：《湖南大学学报（自然科学版）》2016年第8期70-77,共8页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51175521;51375506);重庆市'两江学者'计划专项经费资助项目~~

摘　　要：水润滑轴承的摩擦性能取决于橡胶轴瓦的润滑状态、硬度、动态粘弹性等.选取坡缕石(AT)纳米粉体,经硅烷偶联剂KH-550表面改性处理后,加入NBR制成AT/NBR橡胶轴瓦硫化胶试件与AT/NBR水润滑轴承试件.检测表明,AT/NBR橡胶轴瓦硫化胶试件的综合力学性能、硬度提高.动态力学分析仪DMA测得,NBR,AT/NBR橡胶轴瓦硫化胶试件0℃时的损耗因子大约相等,表明两者的湿滑能力基本不变.通过轴承摩擦磨损试验机,测出AT/NBR轴承试件的水润滑摩擦噪声、摩擦系数与磨损量降低.以上实验表明,AT/NBR轴承试件比NBR轴承试件的摩擦磨损等性能指标有所提高,并达到了美军标(船舶)MIL-DTL-17901C(SH)的规定.The friction performance of water-lubricated bearing depends on the lubricated conditions, hardness, dynamic viscoelasticity of rubber, and so forth. After the surface was modified with silane coupling agent KH-550, palygorskite （AT） nano-powder was added to NBR rubber to prepare AT/NBR rubber-liner vulcanizate sample and AT/NBR water-lubricated bearing sample. Proved by testing results, the comprehensive mechanical properties and the hardness of AT/NBR rubber-liner vulcanizate sample were enhanced. Detected by dynamic mechanical analyzer （DMA）, the loss factor values at 0℃ of NBR and AT/NBR rubber-liner vulcanizate samples were approximately the same, and the wet sliding properties almost remained unchanged. When tested with friction wear-test machine of bearing, the water-lubricated friction coefficient of AT/NBR bearing sample decreased. Those experiments have shown that the performance index of AT/NBR bearing sample is better than that of the NBR bearing sample and meets the requirements of MIL-DTL-17901C （SH） specification.

关 键 词：水润滑 轴承 纳米坡缕石 丁腈橡胶 摩擦性能 

分 类 号：TH133.3[机械工程—机械制造及自动化] TH117.1