立式自吸泵前口环几何参数对其自吸性能的影响  

Influence of geometric parameters of front wear-ring of vertical self-priming pump on its self-priming performance

作　　者：赵伟国[1,2] 强欢欢 许强 刘明建 ZHAO Weiguo;QIANG Huanhuan;XU Qiang;LIU Mingjian(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050,China;Key Laboratory of Fluid Machinery and System of Gansu Province,Lanzhou University of Technology,Lanzhou,Gansu 730050,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]兰州理工大学甘肃省流体机械及系统重点实验室,甘肃兰州730050

出　　处：《排灌机械工程学报》2024年第4期333-341,共9页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(52169018)。

摘　　要：为探究立式自吸泵前口环几何参数对其自吸性能的影响,以350WFB-1200-50型外混式无密封立式自吸泵为研究对象,在保证自吸泵其他参数不变的情况下,通过改变前口环间隙δ和前口环长度l的数值大小,共设计20种方案.利用数值计算和试验验证相结合的研究方法,通过定常数值计算得到不同方案外特性曲线图及前口环进出口压差图;通过非定常数值计算得到不同方案不同时刻中间截面气体体积分布云图、不同方案自吸泵出口含气率变化图及不同方案自吸完成时间曲线图来研究立式自吸泵前口环几何参数与其自吸性能的关系.研究发现:前口环间隙δ和前口环长度l对自吸泵自吸性能均有影响,适当减小前口环间隙δ和增大前口环长度l均能提高自吸泵自吸性能,且当前口环间隙δ过大时,其对自吸泵自吸性能的影响大于前口环长度l对自吸泵自吸性能的影响.In order to explore the influence of the geometric parameters of the front wear-ring of a vertical self-priming pump on its self-priming performance,the 350WFB-1200-50 externally mixed sealless vertical self-priming pump was taken as the research object.With other parameters unchanged,a total of 20 solutions were designed by changing the numerical values of the front wear-ring clearanceδand the front wear-ring length l.Using a research method that combines numerical calculation and experimental verification,the hydraulic characteristic curve of each design scheme and the pressure difference between the inlet and outlet of the front wear-ring were obtained through steady numerical calculation,and the gas volume distribution cloud map of the middle section at different times of each design scheme was obtained through unsteady numerical calculations.The change diagram of the gas content rate at the outlet of the self-priming pump of each design scheme and the self-priming completion time curve of each design scheme were used to study the influence of the geometric parameters of the front wear-ring on its self-priming performance.The study finds that the front wear-ring clearanceδand the front wear-ring length l have an effect on the self-priming performance of the self-priming pump,appropriately reducing the front wear-ring clearanceδand increasing the front wear-ring length l can improve the self-priming performance of the self-priming pump,and when the front wear-ring clearanceδis too large,the effect of the front wear-ring clearanceδon the self-priming performance of the self-priming pump is larger than the effect of the front wear-ring length l on the self-priming performance of the self-priming pump.

关 键 词：立式自吸泵 前口环间隙 前口环长度 自吸性能 自吸时间 

分 类 号：S277.9[农业科学—农业水土工程]