Flow Force of Pressure Independent Control Valve with Different Valve Core Structural

Abstract

Aiming at the problem of hydraulic and thermal imbalance in variable flow heating and cooling systems, based on the computational fluid dynamics method, the 3D model of pressure independent control valve under different control valve core structure is established. The kinetic equation of valve core were established by using the valve core movement. The influence of different control core structure on valve Properties under transient pressure was studied, the distribution of fluid force, and pressure on valve core are obtained. The results show that, under the same flow characteristics, there are certain unbalanced forces in different valve core structure under different pressure differences, the fluid force distribution of the valve core is different, with a maximum value difference of 140%. Reasonable selection of different valve core structures for different working conditions can effectively improve the properties of the valve.