21427 Influence of pressure drop in- and deformation of water hydraulic relief valve on valve performance

This paper deals with influence of valve deformation of water hydraulic relief valve on the valve performance. To suppress cavitation, two serial throttles are employed. Intermediate pressure at the space between the two throttles is determined by the ratio of openings of each throttle. In operation, valve deformation changes valve opening; thus the intermediate pressure changes. The influence of the valve deformation is large when the valve displacement is small and the pressure difference across the throttle is large. The valve deformation under various pressures is calculated using ANSYS 9.0. The results of the numerical analysis is used to estimate value characteristics.