砂粒尺寸对丁腈橡胶在原油介质中摩擦磨损行为的影响  

Effect of Sand Size on Tribological Behavior of Nitrile Rubber in Crude Oil Medium

作　　者：陈骥驰 吕晓仁[1] 王世杰[1] 

机构地区：[1]沈阳工业大学机械工程学院,辽宁沈阳110870

出　　处：《润滑与密封》2016年第3期71-75,共5页Lubrication Engineering

基　　金：国家自然科学基金项目(50875178);辽宁省自然科学基金项目(2013020039)

摘　　要：利用往复式磨损试验机研究丁腈橡胶在含不同尺寸的尖形和圆形砂粒原油介质中的摩擦磨损行为,并利用体式显微镜和场发射扫描电镜分析橡胶磨痕的表面形貌及检测表面元素含量。结果表明:随砂粒尺寸的增加,丁腈橡胶在含砂原油介质中的摩擦因数和磨损量均逐渐增加,而随着载荷的增加,摩擦因数降低,磨损量增加;在相同载荷和砂粒尺寸下,尖形砂粒存在时的摩擦因数和磨损量都大于圆形砂粒;在小载荷条件下,不同尺寸砂粒的运动方式都以滚动为主,在大载荷情况下,当尖形砂粒尺寸增大到1 mm时,砂粒在材料表面的运动方式以滑动为主;砂粒尺寸以及载荷的增加,均加大了对分子链的破坏,从而使得磨痕表面C元素相对含量降低。Friction and wear behavior of nitrile rubber in crude oil medium with different size and shaped sand ( sharp and round) was investigated by the reciprocating wear tester, and morphology and element content of worn surface were measured by stereo microscope and field emission scanning electron microscope.The results show that,with the increasing of sand size,the friction coefficient and wear loss of rubber in crude oil medium are gradually increased,while with the increasing of load,the friction coefficient is decreased,and the wear loss is increased.The presence of sharp sand leads greater friction coefficient and wear loss than round sand under the same load and sand size.In the case of small load,the movement of different sand size is mainly rolled,while in the case of large load,the movement of sand on material surface begin to slide when the size of sharp sand increases to 1 mm.The destruction of molecular chain becomes severe with the increasing of sand size and load,which leads C element percentage content on worn surface to reduce.

关 键 词：螺杆泵 丁腈橡胶 原油介质 砂粒尺寸 摩擦磨损 

分 类 号：TH117[机械工程—机械设计及理论]