Influences of Key Structural Parameters of Hydraulic Piston Pump on Cavitation

In order to focus noises, vibrations and component corrosions caused by the cavitation in hydraulic plunger pump, a numerical simulation was conducted through full cavitation model and k-ε turbulence model to study the distribution of gas-phase volume fraction at various positions in plunger chamber and the generation mechanism of the distribution and the cavitation at relief grooves. The relation between depth of level 1-relief groove with its gas-phase volume fraction and impulse frequency in plunger pump. The results reveal that cavitations occur mainly at the intake areas, and the gas-phase volumes get to the largest fraction at the moment while water touching the inlet of port plate, and reducing dip angle of the sloping plate the gas phase volume fraction and its lasting period are decreased. Increasing the depth of level 1-relief groove wakens the cavitation, but it strengthens the peak pressure and pressure pulsation rate. © 2018, China Mechanical Engineering Magazine Office. All right reserved.