低扬程泵装置压力脉动特性  

Characteristics of pressure fluctuation in pump system with low head

作　　者：陈兰川 徐磊[2] 张小康 颜士开 王东伟 CHEN Lanchuan;XU Lei;ZHANG Xiaokang;YAN Shikai;WANG Dongwei(Zhejiang Water Conservancy and Hydropower Construction Holding Development Co.Ltd.,Hangzhou,Zhejiang 310020,China;College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou,Jiangsu 225009,China;Zhejiang Design Institute of Water Conservancy&Hydroelectric Power,Hangzhou,Zhejiang 310002,China)

机构地区：[1]浙江省水利水电建设控股发展公司,浙江杭州310020 [2]扬州大学水利科学与工程学院,江苏扬州225009 [3]浙江省水利水电勘测设计院,浙江杭州310002

出　　处：《排灌机械工程学报》2020年第2期121-126,144,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51309200,51779215);中国博士后科学基金资助项目(2013M540469);江苏省博士后科研基金资助项目(1301021A)

摘　　要：初步分析了低扬程泵及泵装置压力脉动的基本规律.基于浙江姚江上游西排工程排涝泵站立式泵装置不同叶片角度和不同流量时的压力脉动特性模型试验结果,研究泵装置的叶轮室进口、叶轮室出口、导叶体出口和出水流道出口处的压力脉动规律.从叶轮与导叶之间的水流条件、水泵运行工况等方面,对低扬程泵装置压力脉动进行了初步理论分析,提出了导叶体与叶轮间隙的大小、导叶体的叶片数对低扬程泵装置压力脉动特性的影响等需进一步研究的问题.从水力因素和水泵制造等方面提出了避免低扬程泵装置压力脉动有害影响的对策:适当加大叶轮与导叶之间的间隙,避免水泵在偏离最优工况较多的条件下运行,提高水泵抗空化性能等;从避免产生共振的角度,提出适当加大叶轮叶片厚度、导叶叶片厚度和加强水泵的结构设计等措施.The basic rules of pressure fluctuation in the vane pump and pump system with low head were analyzed preliminarily.According to the pressure fluctuation model test results of the vertical pump system of drainage pumping station in the West Drainage Project of Upper Yaojiang River under different impeller angles and different discharges,the basic rules of pressure fluctuation at the impeller chamber inlet,impeller chamber outlet,guide vane outlet and outlet conduit outlet were analyzed preliminarily.Theoretical analysis for the pressure fluctuation in the pump system with low head was made from the aspects of the flow condition between impeller and guide vane and the pump working condition.And the further research problems for the pressure fluctuation in the low head pump system were put forward such as influences of the size of the gap between the guide vane and the impeller and the number of guide vane on the pressure fluctuation characteristics of the pump system with low head.From aspects of hydraulic factor and pump manufacture,the countermeasures which were used to avoid the harmful effect of pressure fluctuation were proposed,including appropriately increasing the gap between the impeller and the guide vane,avoiding the pump operating under the condition of deviating from the optimal working condition,and improving the cavitation resistance performance of the pump.From the angle of avoiding resonance,some measurements such as appropriately increasing the thickness of the impeller blades and guide vanes,and strengthening the structural design of the pump were put forward.

关 键 词：低扬程泵装置 动静干涉 压力脉动 特性 共振 

分 类 号：TV675[水利工程—水利水电工程] TH31[机械工程—机械制造及自动化]