Flow Field Analysis of Hydraulic Multi-way Valve Based on CFD

Referring to the structure and parameters of the actual multi-way valve, the CAD software SOLIDWORKS was used to establish the three-dimensional geometric model of the internal flow passage of the hydraulic multi-way valve, and the model was calculated and analyzed by CFD software Star CCM+. By studying the flow field distribution in the valve chamber, the pressure distribution at each monitoring point in the chamber and the change of the overall flow rate were obtained, and the steady-state hydrodynamic force of the valve core was calculated. The effects of flow rate and the opening of the valve core on the pressure distribution and steady-state hydrodynamic force in the valve chamber were analyzed under various working conditions. The results show that the steady-state hydraulic force on the valve core increases with the increase of flow rate and decreases with the increase of valve opening. The pressure loss at the inlet and outlet of the slide valve is mainly caused by the throttling characteristics of the oil at the throttle port. The smaller the opening, the greater the inlet pressure and the greater the pressure at all points in the valve chamber.