The InfluEnce of Texture Parameters on the Lubrication Performance of the Horizontal Pump Piston Surface

Addressing the issue of piston wear in the hydraulic end of horizontal pumps due to low water viscosity and poor lubricity, a Computational Fluid Dynamics （CFD） lubrication simulation model featuring staggered surface textures was established. The study investigated the impact of texture parameters on the performance of the lubrication film. By analyzing the variation patterns of static pressure, load capacity, and friction coefficient on the textured surface within a single cycle, the effects of stagger angle, texture radius, and depth on the lubrication characteristics of the lubrication film were explored. The results indicate that the order of influence of texture parameters on lubrication performance is as follows: texture radius > stagger angle > texture depth. Compared to uniformly arranged textures, using a stagger angle of 40° can enhance the load capacity of the lubrication film by 52.2% and reduce the friction coefficient by 34.4%.