空间转角蚁穴式调节阀复合降压结构设计及仿真分析  

Design and Simulation Analysis of Compound Depressurization Structure of Space Angle Ant-nest Regulating Valve

作　　者：韩明兴 丁爽爽[3] 吴新宇 马玉山 罗小辉 刘银水[2] HAN Ming-xing;DING Shuang-shuang;WU Xin-yu;MA Yu-shan;LUO Xiao-hui;LIU Yin-shui(School of Engineering,Huazhong Agricultural University,Wuhan,Hubei 430070;School of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan,Hubei 430074;College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050;Wuzhong Instrument Co.,Ltd.,Wuzhong,Ningxia 751100)

机构地区：[1]华中农业大学工学院,湖北武汉430070 [2]华中科技大学机械科学与工程学院,湖北武汉430074 [3]兰州理工大学能源与动力工程学院,甘肃兰州730050 [4]吴忠仪表有限责任公司,宁夏吴忠751100

出　　处：《液压与气动》2023年第4期1-10,共10页Chinese Hydraulics & Pneumatics

基　　金：国家重点研发计划资助(2018YFB2004001);国家自然科学基金项目(32101627);中央高校基本科研业务费专项资金资助项目(2662019QD023)。

摘　　要：空间转角蚁穴式调节阀(ATE调节阀)降压结构复杂,其空间转角蚁穴式节流元件(ATE节流元件)流道融合了转折、扩张、汇合、分流和对冲等流动过程。通过CFD流场仿真,研究在不同压力等级下ATE节流元件级间压力、速度、流量及气体体积分数随降压级数、流道形状、流道关键结构尺寸等参数的变化规律。压降特性仿真结果表明,ATE节流元件能够将一次较大的压降分解成多次的小压降,逐级降压过程压降线性度良好。同时ATE节流元件关键结构参数的仿真研究表明,级间距为7 mm时空化最小,渐缩型节流元件空化程度最小,腰型槽为3 mm时节流元件空化程度最小,出口沉槽倒角不会降低空化程度,增大出口沉槽过流面积会导致空化程度增加。最后搭建了ATE节流元件测试平台,对节流元件在不同压降条件下的压力和流量进行了测试,ATE节流元件级间压力测试与仿真结果的最大误差不超过8%,流量误差平均值约为10%,试验测试与仿真计算结果具有较好的一致性,试验验证了仿真计算的准确性。The internal flow path of the ant-nest multi-stage regulating valve(ATE regulating valve)is complex.The flow path of ant-nest throttle element(ATE throttle element)includes the flow processes of turning,expansion,convergence,diversion and hedging.Through CFD simulation,this paper focuses on the changes of velocity,flow and gas volume fraction of ATE throttling element,channel shape,key structure size of channel and other parameters under different pressure levels.The simulation results show that ATE throttling element can decompose a large pressure drop into several small pressure drops,and the step-by-step pressure drop process is linear.At the same time,the key structural parameters of the flow channel of ate multi-stage step-down regulating valve have been studied.It is found that the cavitation degree of the tapered throttle element is the smallest while the space-time minimization of the stage spacing is 7 mm.The cavitation degree of the tapered throttle element is the least.When the waist groove is 3 mm,the cavitation degree of the flow element is the smallest.Chamfering the outlet sink will not reduce the cavitation degree,and increasing the overflow area of the outlet sink will increase the cavitation degree.Finally,the ATE throttle element test platform is built to test the pressure and flow of the throttle element under different pressure drop conditions.The maximum error of analog inter-stage pressure of ate throttling element is not more than 8%,and the average flow error is about 10%.The test results are in good agreement with the simulation results,and the test results verify the accuracy of the simulation calculation.

关 键 词：多级调节阀 空间转角蚁穴式节流元件 复合降压结构设计 CFD流场仿真 

分 类 号：TH137[机械工程—机械制造及自动化]