高压隔膜泵单向阀流固耦合建模与振动特性研究  

Fluid-structure Interaction Modeling and Vibration Characteristics of Check Valve in High-pressure Diaphragm Pump

作　　者：陈虹潮 马军[1,2] 王晓东[1,2] 胡楷 CHEN Hongchao;MA Jun;WANG Xiaodong;HU Kai(School of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650500,China;Yunnan Provincial Key Laboratory of Artificial Intelligence,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,昆明650500 [2]昆明理工大学云南省人工智能重点实验室,昆明650500

出　　处：《机械科学与技术》2024年第7期1199-1206,共8页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(62163020);云南省基础研究计划项目(202101BE070001-055,202102AD080007)。

摘　　要：针对单向阀开启过程中强迫振动产生的根源和流激振动问题,构建了开度为5%、15%、30%、50%、75%和100%的流固耦合仿真模型,对不同开度情况下的流体与固体场特性以及流体施加于阀芯上的流激振力进行数值分析,得到了流场压力云图、速度矢量云图和流激振力脉动峰值频率以及阀芯在各开度下的模态振型和固有频率。结果表明:单向阀开启过程中,阀芯两侧存在较大的压差,变形区域主要集中于胶垫,阀腔内高速流体与低速流体接触时出现剪切形成涡流,流动涡流周期性变化产生的流激振力导致阀芯被迫振动,阀芯上的流激振力脉动峰值频率分布范围逐渐增加且波动更大。Aiming at the root causes of forced vibration and flow-induced vibration problems during the opening process of the check valve,a fluid-structure interaction simulation model with different opening degrees of 5%,15%,30%,50%,75%and 100%was constructed.The characteristics of the fluid and solid fields and the flow-exciting force exerted by the fluid on the valve spool were numerically analyzed,and the pressure cloud map of the flow field,the velocity vector cloud map,the peak frequency of the flow-induced vibration force,and mode shapes and natural frequencies of the valve core at each opening degree were obtained.The results show that:during the opening process of the check valve,there is a large pressure difference on both sides of the valve core,and the deformation area is mainly concentrated in the rubber pad.When the high-speed fluid in the valve cavity contacts the low-speed fluid,a vortex is formed by shearing,and the flow vortex changes periodically.The flow-exciting force generated by the vortex causes the spool vibration,and the peak frequency distribution of the flow-exciting force pulsation on the spool gradually increases and fluctuates more.

关 键 词：单向阀 流固耦合 流场特性 固有频率 振动特性 

分 类 号：TH137.523[机械工程—机械制造及自动化]