Abstract
The purpose of this research is to get the pressure-flow characteristics of V-notch machined on the valve plate of hydraulic pump and motor.
The changes of discharge coefficient are investigated with a basic test device by using the shapes of notch, the openings, the direction of flow, the pressure difference, the back pressure and the like as a parameter. The occurrence of cavitation is observed by means of a transparent apparatus to consider the relation with the discharge coefficient.
