Analysis on Pressure Distribution and Internal Leakage Flow Rate of Transitional Areas of Spherical Valve-plate Pair

The pressure distribution model of transitional area of valve-plate with double triangle groove was build up,and the principle formula of the internal leakage flow rate was presented.The model and the formula were used in the analysis of A4VG125 pump made by Rexroth.The influence of triangle groove to pressure distribution and internal leakage flow rate was discussed,it provides a reference to improve the design of spherical valve-plate pair.