水压马达配流副仿生非光滑表面摩擦学性能

为探究剩余压紧力条件下具有仿生非光滑表面结构的水压马达配流副的摩擦学性能,选取431不锈钢和碳纤维增强PEEK作为摩擦副配对材料,在保持凹坑面积占有率相同的情况下,设计和制造了三种不同截面且直径分别为0.8 mm、1.0 mm、1.3 mm和1.7 mm的仿生非光滑表面凹坑试件,通过摩擦磨损试验获得了摩擦副摩擦系数、试件摩擦表面微观情况、试件摩擦表面粗糙度分布及磨损量等结果。结果表明,造成配流副磨损的摩擦机理主要有磨粒磨损、粘着磨损和沟犁磨损；配流副间设计的凹坑型非光滑表面都起到了降低摩擦系数、加快摩擦系统平衡和减少磨损量的作用；开口直径为1.0 mm的圆锥形凹坑能起到更好地降低摩擦系数的效果；开口直径为1.0 mm的圆锥形凹坑能起到更好地减少磨损的作用。

Tribology properties for valve plate with bionic non-smooth surface of seawater hydraulic motor

In order to explore the friction and wear properties of valve plate pair with bionic non-smooth surface of seawater hydraulic motor under residual compression force, 431 stainless steel and carbon fiber reinforced PEEK were selected as friction pair matching materials. In the context of the pit area occupancy was kept the same, bionic non-smooth surface pit specimens with different cross-sections and diameters of 0.8 mm, 1.0 mm, 1.3 mm and 1.7 mm were designed and fabricated. Through the friction and wear experiment, the friction coefficient of the friction pair, microcosmic condition of friction surface of the specimens, the roughness distribution of the friction surface of the specimens and the wear amount were obtained. The results show that the tribological mechanism of valve plate wear mainly includes abrasive wear, adhesive wear and furrow wear. The non-smooth surface designed between the valve plate pairs plays a role in reducing the friction coefficient, accelerating the balance of the friction system and reducing the wear weight. The conical pit with an opening diameter of 1.0 mm can better reduce the friction coefficient. Meanwhile, the conical pit with an opening diameter of 1.0 mm plays a significant role in reducing abrasion.