CFD Analysis of Variable Displacement Swash Plate Type Axial Piston Pump Flat Slipper

Abstract

In the field of hydraulic machines, piston pumps are the only ones that can work under very high pressures and deliver the best efficiency as a result of which they have a very sophisticated design. As per surveys, most parts of these pumps have validation from the experience of designers as a result of which there isn’t any mathematical tool for design optimization of different parts. Although there are now companies e.g. Oilgear Towler, who are in favor of, and themselves inserted, slots (grooves) on the slippers and in pistons as we shall in this report, there is no particular study to realize their benefits and drawbacks. Therefore, it is necessary to study the advantages and disadvantages arising due to the presence of grooves on the surface of different parts of the pump mathematically or through CFD solvers. In this project work, the aim is to analyze the effect of design parameters and working conditions on the pump behavior. This is done using a parametric study performed on a model of the slipper and simulating the physical problem on ANSYS. As major leakage occurs between slipper and swash plate clearance there-fore in this project report static and dynamic analysis of slipper is done. The Navier Stokes Equations are solved in 3-D to acquire results using Rhie and chow method and ANSYS FLUENT solver. The various design points which affect the efficiencies of a pump in a positive manner, if any, shall be discussed in the conclusion part.