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.

小开度情况下的喘振会显着影响直动式压力阀 (DAPV) 的边界性能。本文从静力学和动力学角度阐述了小开度条件下DAPV振动的原因。本文研究了使用多种技术的压力阀。其中包括采用实验和模态分析方法研究压力阀的结构动力学，采用流-固控耦合仿真方法模拟压力阀的振动过程，采用非恒流场模拟研究压力阀的内部射流特性分析方法。基于上述方法得出的结论，提出了几种可能的有效减振方法，以提高 DAPV 在低流量条件下的性能。