炭黑及丙烯腈含量对丁腈橡胶磨损机理的影响

Impacts of carbon black and cyanoethylens contents on NBR wear behaviors

丁腈橡胶是一种重要的螺杆泵定子材料.以不同炭黑及丙烯腈含量的丁腈橡胶与45#钢组成的摩擦副为研究对象,采用MPV-600型环-块摩擦磨损试验机,在干摩擦和原油润滑条件下进行摩擦磨损试验,对丁腈橡胶磨损量及摩擦系数进行分析,初步探讨了其磨损机理.从试验结果可以看出,干摩擦条件下丁腈橡胶的磨损量随着载荷的增大而增大,炭黑和丙烯腈含量的增加使丁腈橡胶的耐磨性增强.原油介质下的磨损规律与干摩擦基本相同,丁腈橡胶磨损表面平整,磨损量很小,且原油介质的润滑和冷却作用使橡胶的摩擦系数降低.

Due that the NBR is a critical material for crew pump stators,the frictional pair,which comprises No.45 steel and NBR with diverse carbon black and cyanoethylene contents,is studied.By using MPV-600 ring-block friction and wear testing machine,the experiments are first conducted under dry friction and crude-oil lubrication conditions.Then,the NBR abrasion and frictional coefficient are analyzed to initially investigate the wear mechanism.Finally,it is found from experimental results that,the NBR abrasion under dry friction increases with more loading,while the abrasive resistance intensifies with higher carbon black and cyanoethylene contents.In addition,the wear mechanisms under dry friction and crude-oil lubrication conditions are almost the same,whereas the NBR wear loss is quite small with smooth surface,accompanied by decreased frictional coefficient under crude-oil lubrication and cooling.