菱形孔织构端面的润滑性能研究  

Study on Lubrication Performance of End Faces with Diamond Macro-pores

作　　者：程香平[1] 康林萍[1] 张友亮[1] 付远[1] 余宝玲[1] 王德[1] 

机构地区：[1]江西省科学院应用物理研究所,南昌330029

出　　处：《江西科学》2016年第6期829-833,共5页Jiangxi Science

基　　金：国家青年科学基金项目(51505203);江西省科技开发和产业化开发项目--火炬计划项目(20151BBE51065);2015年江西省科学院博士启动基金项目(2014-YYB-18和2014-XTPH1-18)

摘　　要：在充分供液的条件下,通过试验研究了菱形孔织构的尺寸、排布方式以及深度对摩擦系数的影响规律及其机理分析。结果表明:具有同样排布方式和倾斜角度的菱形孔织构端面,孔的深度和孔型面积比的大小对摩擦副表面的摩擦性能影响较大;在研究的工况下,并不是所有的大菱形孔织构的Stribeck曲线在流体动力润滑阶段呈现出单调上升的趋势,而是产生波动现象;同条件下,随着载荷的增加,两端面间液膜厚度变薄,摩擦状态由流体润滑状态逐渐转化为混合摩擦状态,导致摩擦系数的不断减小。The UMT multifunctional friction and wear testing machine was applied,in order to exam-ine the size,shape,configuration and depth of the diamond macro-pores on the influence law of the friction coefficient and mechanism analysis. The results showed that：An end face with the diamond macro-pores texture of the proper structure and depth,can greatly improve the tribological properties of the lubricating friction pairs,and can effectively reduce the friction coefficient. Under the working conditions of the research,end faces with bi-direction,double-row inclined diamond macro-pores and when the depth is 10 μm,had better tribological properties. When the certain textured end faces en-tered the hydrodynamic lubrication stage,with the increase of the herscy characteristic number,fric-tion coefficient showed the phenomenon of fluctuations,instead of gradually increasing trend. Because fluid between the sliding surfaces could produce cavitation,then the gas-liquid border of cavitation region would produce interface slip,cavitation region increased,then slip length increased,further-more interface slip effect increased,the anti-friction property was better. When end surfaces intimate-ly touched under the mixed lubrication conditions,liquid medium was trapped in the diamond pits, then the liquid could be regarded as a lubricant of the secondary source,the liquid in the diamond pits was deliveried back to the seal surface by the relatively movement of the end faces,this would lead to make friction coefficient reduced.

关 键 词：摩擦磨损 织构端面 STRIBECK曲线 摩擦系数 

分 类 号：TH117.2[机械工程—机械设计及理论]