Analysis and Solution for the Vibration of Direct-Acting Pressure Valve Under Small Opening Conditions

The boundary performance of direct-acting pressure valves (DAPV) is significantly impacted by surging in small opening situations. This paper illustrates the causes of vibration of DAPVs under small opening conditions from the viewpoints of statics and dynamics. This paper studies a pressure valve using several techniques. These include studying the structural dynamics of the pressure valve using experimental and modal analysis methods, simulating the pressure valve vibration process using flow-solid-control coupling simulation methods, and studying the internal jet characteristics of the pressure valve using non-constant flow field simulation analysis methods. Based on the conclusions drawn from the above methods, several possible effective vibration damping methods are proposed to improve the performance of DAPVs under low flow conditions.