Effect Of Textured Coating On The Tribological Properties Of Slipper Pair In Piston Pump

As a crucial component of axial piston pumps,the slipper pair plays a significant role in the durability and reliability of the pump.However,due to frequent cyclic pressure shock and high impact velocity on the surface of the slipper pair,it is susceptible to lubrication failure,material wear,and component failure,posing a significant risk.To address this issue,this study focuses on enhancing the lubrication and wear resistance of the slipper pair surface using a combined approach of coating and surface texturing,which creates a textured coating composite surface.Experimental analysis and simulation comparison were conducted to investigate the application of the textured coating surface in the slipper pair,and the findings are presented in this paper.Overall,this study sheds light on the importance of the slipper pair and proposes an effective solution to improve its performance and reliability.The main content and conclusions of the paper are as follows:1.Firstly,we established the model of the slipper pair and the morphology model of the reticular texture.We elaborated on the basic lubrication principle and control equation of the textured surface lubrication problem.Furthermore,we introduced the solution process and method of ANSYS Fluent fluid simulation.Focusing on local textures,we conducted in-depth research and obtained the pressure cloud map and flow streamlines of the texture’s interior.We analyzed the lubrication mechanism of the texture and found that the textured surface can achieve optimized lubrication effects by adjusting the texture’s size parameters.The research results have important theoretical and practical significance for a deeper understanding of the lubrication mechanism of the textured surface and the further improvement of lubrication efficiency.2.We conducted lubrication simulation calculations on the global reticular texture and analyzed the pressure nephogram obtained from the simulation.Based on the pressure nephogram results,we calculated the oil film bearing capacity of the texture.We established a three-dimensional geometric model of the slipper pair and utilized ANSYS Fluent simulation to analyze the lubrication performance of the textured coating surface on the slipper pair.Our research investigated the impact of the pressure nephogram and average pressure on lubrication performance and verified the feasibility of applying the textured coating surface to the slipper pair.3.Based on the actual working conditions of the slipper pair,lubrication experiments were conducted on the clearance surface under different operating parameters and different surface sizes of the textured coating,with the oil fully filled.The results showed that the maximum oil film carrying capacity was achieved with a texture width of 0.4 mm and a texture groove angle of 120°.Furthermore,wear tests were performed on the textured coating to study its effect on reducing friction and wear resistance.The results showed that the samples Ti N-Wid-0.4,Ti N-Ang-90°,and Ti N-Ang-120° had the least amount of wear.This further confirmed that the existence of a textured coating surface can significantly improve surface lubrication performance,prevent dry friction,and also verify the enhanced wear resistance of the clearance surface by the textured coating surface.