引入特征粗糙度参数的Stribeck曲线试验研究  

Experimental Study on Stribeck Curves Based on Characteristic Roughness

作　　者：马晨波[1] 朱华[1] 陆斌斌[1] 江炜[1] 

机构地区：[1]中国矿业大学机电学院,江苏徐州221116

出　　处：《摩擦学学报》2010年第5期466-471,共6页Tribology

基　　金：国家自然科学基金项目(50975276;50475164);国家973计划项目(2007CB607605);博士点基金课题(200802900513)的资助

摘　　要：为探讨表面粗糙度对Stribeck曲线的影响,对不同初始表面的不锈钢销试件与45#钢盘试件在浸油润滑条件下进行摩擦磨损试验,研究摩擦系数的变化规律.结果表明:摩擦副表面越粗糙,对应Stribeck曲线上混合润滑区域面积越大,曲线斜率越小,使得不同表面粗糙度下的摩擦系数试验模型不具有唯一性.因此,将由分形参数导出的能客观表征粗糙表面的"特征粗糙度"参数引入Stribeck动压参数,从而提出新的动压参数.在新的动压参数下,具有不同表面粗糙度摩擦副的Stribeck曲线具有较好的一致性,继而可建立与粗糙度无关的摩擦系数试验模型.To research the influence of surface roughness on Stribeck curves, the variation of friction coefficient was investigated based on the frictional pairs of stainless steel pins with different surface roughness and 45# steel disc under oil - immersed condition. The results showed that, the rougher the surface, the bigger the mixed lubrication area on Stribeck curve and the smaller the slope of the curve, which led to the non - uniqueness of the experimental model of friction coefficient for different surface roughness. Thus, the characteristic roughness, which was derived from fractal parameter, was adopted to be taken as the rough surfaces and was pulled into the Stribeck hydrodynamic parameter to create a new hydrodynamic parameter. Under the new hydrodynamic parameter, the Stribeek curves of frictional pairs with different surface roughness had a good consistency and can be used to determine the experimental model of friction coefficient which was independent of the surface roughness.

关 键 词：Stribeck衄线 摩擦系数 特征粗糙度 动压参数 

分 类 号：TH117.3[机械工程—机械设计及理论]