Experimental and Numerical Analysis of the Performance of the Hydraulic Valve Including Conical Poppet with the Sharp Edge Seat

In order to optimize the performance of valves including conical poppet with sharp seat in hydraulic power transmission circuits, it is to necessary examine the properties of the oil flow passing through them. In this paper, influence of the vertex angle and displacement of the poppet conical and pressure of the valve inlet oil on the distribution of the pressure and velocity of the oil flow in the valve chamber and the axial force applied to the conical poppet, are evaluated. To ensure the accuracy of numerical analysis, the results of the measured force on the conical poppet are compared with the numerical results. Studies showed that increasing the angle of cone and displacement of the poppet, the maximum speed of the flow of oil through the valve is reduced. Also, increasing the angle of poppet leads to an increase in the axial force on the movable member of the conical valve. A good agreement between the experimental results with the numerical results indicates the accuracy of the numerical solution of the problem. On the other hand, the displacement of the poppet in valves with a sharp edges seat has an inverse effect on the force applied to the moving poppet member.