低比转速离心泵叶轮切割对隔舌部位性能影响的数值分析  

Numerical Analysis of the Centrifugal Pump with Impeller Cutting at Low Specific Speed Performance Impact on the Tongue Section

作　　者：李仁年[1] 曾玲[1] 杨登峰[1] 马达[1] 

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

出　　处：《甘肃科学学报》2013年第4期50-54,共5页Journal of Gansu Sciences

基　　金：国家自然科学基金项目(2011.01-2013);螺旋离心泵内固液两相非定常流动特性与能量转化机理研究(51079066)

摘　　要：对MH-47-100型低比转速离心泵在D1/D2>0.9和0.8<D1/D2<0.9的情况下共进行了5次切割,通过数值模拟得到了切割之后离心泵的性能曲线,并对切割后的各性能曲线和切割后离心泵隔舌部分的外特性和内特性进行对比分析,结果表明:切割量应保持在10%之内;小流量下对叶轮外径切割后泵隔舌部位流动影响较大,大流量时影响较小.The MH-47-100 type centrifugal pump is used to do five cuttings in the case of D1/D2〉0. 9 and 0.8〈D1/D2 〈0.9. The performance curves of the centrifugal pump after each cutting are obtained by numerical simulation. The external and internal characteristics of the tongue part after each cutting are compared and analysed. The conclusion is that the amount of cutting should be less than 10% and that when the flow is small, the movement of the isolated tongue after cutting is influenced to a large extent but when the flow is large, the influence gets less.

关 键 词：离心泵 低比转速 叶轮切割 隔舌 数值分析 

分 类 号：TH31[机械工程—机械制造及自动化]