Research On The Oil Film Lubrication And Friction Characteristics Of Port Plate Pair Of The High Pressure Pump

The three friction pairs of axial piston pump are piston, slipper and valve pair, which directly determines the overall performance and service life of axial piston pump. Friction pair gap within the appropriate thickness of the lubricating oil film can improve the working environment of friction pair, so as to improve the working performance of plunger pump and prolong the service life of pump.The port plate pair is composed of cylinder,valve plate and the gap between them,which is critical as a friction pair of axial piston pump, the lubrication and friction properties directly decide the plunger pump performance and service life.Thesis research content mainly includes parameters optimization of the universal structure of the valve plate and its influence on film thickness, the influence of friction torque on film thickness and the pressure and velocity distribution simulation of port plate pair oil film etc.The research of the influence of the radius ratio of seal belt and waist-slot width on oil film thickness applies Mathematic and MATLAB to fulfill relevant calculation and to generate the relational graph of two structural parameters and the oil film thickness. And the optimized structural parameters of seal belt and waist-slot are obtained. CFD module of ANSYS is used to mesh the oil film. Then through the FLUENT module, pressure distribution and velocity distribution of the oil film is simulated. Stress analysis of the port plate pair is carried out. The friction torque model of the port plate pair is established to explore the changing rules of the friction torque under different oil film thicknesses.