Investigation of the Pressure Fluctuation of Piston Chambers with Variable Slot Geometry

High-pressure fluctuation and flow ripple may cause unexpected vibration noise when the piston pump works under severe conditions, eventually lead to hydraulic transmission failure. The geometry of valve plate has a great influence on pressure chamber. In order optimize structure plate, mathematical model considering slot leakage lubricating interfaces was established in this paper. used investigate chamber, then accuracy validated by comparing simulation experimental results. Further results show that chamber can be effectively suppressed optimizing triangular slots parameter good design could reduce undershoot overshoot at starting moment.