盘式摩擦副沟槽织构摩擦磨损特性研究

Friction and Wear Characteristics of Disc Friction Pair with Groove-shaped Texture

轴向柱塞泵配流副是一种典型盘式摩擦副,其对柱塞泵性能有重要影响;摩擦副表面织构具有良好的减摩抗磨功能,与通常研究的凹坑状织构相比,沟槽状织构具有明显的贯通性,润滑、冷却和排屑效果好等优点。为改善配流副摩擦磨损性能,根据前期研究结果设计并制作了16槽及32槽两种类型盘式摩擦副,探讨沟槽状织构化配流副的摩擦磨损特性,分析织构基体硬度、织构角度,以及载荷等对其性能影响。研究结果表明:盘式摩擦副表面沟槽状织构可有效改善摩擦特性,基体材料硬度、织构角度与实验压力均会对织构化摩擦副的摩擦磨损特性产生影响;在3MPa压力下,与无织构试样对比,32槽、60°织构角的软材料与未处理硬材料组成配对副时,表现出最优的摩擦磨损特性,摩擦因数仅为0.038,磨损量降低了57.48%,磨损表面也未出现严重磨损现象。上述研究结果将为轴向柱塞泵配流副的优化设计提供参考依据。

The valve plate/cylinder block within the axial piston pump is a typical disc friction pair,which has an important impact on the performance of the piston pump.The surface texture can improve the anti-friction and anti-wear performance of the friction pair.Compared with the pit-shaped surface texture,the groove-shaped surface texture is better in terms of lubrication and cooling.To improve the friction and wear performance of the current valve pair/cylinder block pair,two types of disk friction pairs with 16 grooves and 32 grooves were designed and manufactured on the basis of the previous research,then the effects of the matrix hardness,texture angle and experimental pressure and on the performance of the friction pair were analyzed and discussed.The results show that:the groove-shaped texture on the surface of the disc friction pair can effectively improve the friction characteristics;the hardness of textured matrix material,textured angle and experimental pressure play influences on the friction and wear characteristics of the textured friction pair.Compared with the non-textured sample at 3 MPa,it shows the best friction and wear characteristics when the pair formed by the untreated hard material and the soft material which textured angle is 60°and the textured number is 32,the friction coefficient was only 0.038,and the wear decreased by 57.48%,and there was no serious wear on the worn surface.These results are useful for the optimization design of the valve plate/cylinder block in the axial piston pump.