摘要
丁腈橡胶(NBR)是一种优异的水润滑减摩耐磨材料,但硬质颗粒的介入对其产生较大的材料损失.利用硅烷偶联剂TESPT改性纳米SiO_(2)颗粒,并填充至NBR基体,获得改性纳米SiO_(2)/NBR标记为NBR-1.改性后的纳米SiO_(2)颗粒在NBR基体中均匀分散.将纳米SiO_(2)颗粒、微米SiO_(2)颗粒填充至NBR基体标记为NBR-2、NBR-3作为对照组.三种复合材料在武汉理工大学自制的SSB-100型摩擦磨损试验机上进行沙水润滑工况下的摩擦磨损试验.结果表明:三种复合材料在沙水工况下摩擦系数均随载荷和转速的增加而下降.在相同的载荷和转速条件下,NBR-1的摩擦性能最为优异.对比三种材料的耐沙磨损性能,沙粒对NBR表面的磨损主要为犁沟磨损,NBR-2和NBR-3材料磨损量远远大于NBR-1,NBR-1材料更适用于含沙水区域.
Nitrile butadiene rubber(NBR) is widely used in water-lubricated material because of its excellent antifriction and wear-resistant performance. NBR is severely worn in water containing sand particles. Nano-SiO_(2) particles were modified by the silane coupling agent TESPT and filled into the NBR matrix,labeled as NBR-1. The modified nano-SiO_(2) particles were uniformly dispersed in the NBR matrix. The nano-SiO_(2) particles and micron SiO_(2) particles were filled into the NBR matrix,labeled NBR-2 and NBR-3 as the control group. The three composite materials were subjected to friction and wear tests under sand water-lubricated conditions on the SSB-100 tribo-tester made by Wuhan University of Technology. The results showed that the friction coefficient of the three composite materials decreased as the load and sliding velocity increased under sand water-lubricated conditions. NBR-1 had the best friction performance under the same working conditions. Comparing to the sand water-lubricated wear of the three materials,the wear of composite materials was mainly furrow wear. The material loss of NBR-2 and NBR-3 was much greater than that of NBR-1,and NBR-1 material was more suitable for sandy water areas.
作者
周新聪
杨超振
黄健
刘学申
YANG Chaozhen;ZHOU Xincong;HUANG Jian;LIU Xueshen(School of Energy and Power Engineering,Wuhan University of Technology,Hubei Wuhan 430063,China;National Engineering Research Center for Water Transportation Safety,Wuhan University of Technology,Hubei Wuhan 430063,China)
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2021年第4期564-571,共8页
Tribology
基金
国家自然科学基金项目(51579198)
中央高校基本科研业务费资助(2021-IVA-004B)资助。
关键词
丁腈橡胶
水润滑尾轴承
纳米改性
沙粒
摩擦磨损
nitrile butadiene rubber(NBR)
water-lubricated stern tube bearings
nano-modification
sand
friction and wear
