关键词: 盘式摩擦副, 微织构, 摩擦磨损, 参数优化, 转速, 应力

Abstract: In order to explore an effective way to improve the anti-friction and wear resistance of the disc friction pairs, the port plates of the swash plate piston pump were taken as the research object. Under the same conditions of area texture ratio and section depth shape, the variation of friction coefficient of the port plates machined elliptical and circular opening discrete pit micro-texture and grooved micro-texture with morphology, rotation speed, and pressure were studied by simulation and experiments comprehensively. The results show that the friction coefficient decreases significantly with the increase of rotational speed and decreases with the increase of pressure, the elliptical opening discrete pit micro-texture is the best among the three micro-textures to improve the performances of port plates. The multi-objective parameter optimization of elliptical opening discrete pit micro-texture was carried out, and the optimal parameters are obtained as follows: the radius of the long axis of the ellipse opening is as 452 μm, the short half axis is as 187 μm, and the radial center distance is as 0.7 mm. The experiments verify that the optimized textures friction coefficient and wear amount are reduced to different degrees under different working conditions compared with that before optimization. 

Key words: disc friction pair, micro-texture, friction and wear, parameter optimization, rotational speed, stress