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为了研究表面形貌对线接触弹流状态下摩擦副摩擦特性的影响,采用激光微造型技术,通过控制微造型的形状、深度、间距和面积占有率等参数制造了两组表面高度算术平均值Sa分别相同的试件.使用Talysurf CCI Lite非接触式三维光学轮廓仪对表面进行测量,采用ISO25178参数及连通性系数Us对测量表面进行表征,最后在JPM-1型双盘摩擦磨损试验机上对试件进行富油摩擦试验,得到不同转速、不同载荷工况下的摩擦系数.结果表明:线接触状态下,微造型形状、方向及深度均会对表面的摩擦特性产生影响,顺向箭头微造型表面表现出了最优的摩擦特性;试件摩擦系数随着转速的增大呈线性增长趋势,随着载荷的增大而减小,减小的幅度随载荷的增大逐渐变得缓慢;表面形貌三维表征参数Ssk、Sku、Vvv、Vvc、Us与摩擦特性均有一定的关联性.
In order to study the effect of surface morphology on the friction characteristics of the friction pair under the condition of line-contact spring current, two sets of surface height arithmetic mean values were manufactured by controlling the shape, depth, spacing and area occupancy of the micro- Sa. The surface was measured using a Talysurf CCI Lite non-contact three-dimensional optical profilometer, the surface was characterized using ISO25178 parameters and the connectivity coefficient Us, and finally on the JPM-1 dual-disc friction and wear testing machine The test results show that the shape, direction and depth of the micro-shape will affect the frictional characteristics of the surface under the condition of line contact, and the forward arrow micro The surface friction exhibited the best frictional characteristics. The friction coefficient increased linearly with the increase of rotating speed and decreased with the increase of load. The decreasing amplitude gradually became slower with the increase of load. The three-dimensional characterization parameters Ssk, Sku, Vvv, Vvc, Us of the surface topography have certain correlations with the frictional properties.