先导式溢流锥阀外锥形阀口结构气穴特性数值分析  

Numerical Analysis of Cavitation Characteristics of External Cone Valve Port Structure of Pilot Operated Relief Cone Valve

作　　者：贺建强 冀宏[1] 王东升 HE Jianqiang;JI Hong;WANG Dongsheng(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China;Hunan Hydfly Science&Technology Co.,Ltd.,Changsha Hunan 410000,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]湖南鸿辉科技有限公司,湖南长沙410000

出　　处：《机床与液压》2024年第18期156-161,共6页Machine Tool & Hydraulics

基　　金：广西柳州市科技计划项目(2022ABC0101);广西科技重大专项(桂科AA23023012)。

摘　　要：为了研究先导式溢流锥阀主阀阀口结构参数对阀口抗气穴性能的影响,基于CFD方法,采用Mixture两相流模型和Schnerr-Sauer空化模型,改变阀口结构参数并分析各阀口的压力和气相体积分数的变化规律,提高阀口的抗气穴性能。结果表明:将阀套内锥面向入口端延伸后,阀口脱流区的压力恢复效果更加显著;另外,环形槽结构对阀口抗气穴性能的影响较大,经对比可知,在保持环型槽结构的轴向位置、长度和深度不变的前提下,45°起始边倾角对应的环形槽结构具有最佳的抗气穴性能。In order to study the effect of the valve port structural parameters of the main valve of pilot operated relief cone valve on the anti-cavitation properties of the valve port to cavitation,based on the CFD method,the Mixture two-phase flow model and Schnerr-Sauer cavitation model were used,the structure parameters of the valve port were changed and the variation law of total pressure and gas volume fraction of each valve port was analyzed,the anti-cavitation properties of the valve port was improved.The results show that the pressure restoration in the off-flow region of the valve port is even more effective after extending the inner cone face of the valve sleeve towards the inlet end;additionally,the annular groove structure has a greater effect on the anti-cavitation properties of the valve port.After comparison,it is concluded that the 45°starting edge inclination of the annular groove structure provides optimum anti-cavitation properties,while keeping the axial position,length and depth of the annular groove structure unchanged.

关 键 词：锥形溢流阀 抗气穴特性 数值模拟 结构优化 

分 类 号：TH137.52[机械工程—机械制造及自动化]