基于统计回归分析的双叶片污水泵设计与试验  

The Design and Experiment of the Double-blade Sewage Pump Based on Statistical Regression Analysis

作　　者：宋冬梅[1] 刘雪垠[1] 陈小明 叶道星 谭祺钰 SONG Dong-mei;LIU Xue-yin;CHEN Xiao-ming;YE Dao-xing;TAN Qi-yu(Sichuan Machinery Research and Design Institute,Chengdu 610063,China;School of Energy and Power Engineering,Xihua University,Chengdu 610039,China)

机构地区：[1]四川省机械研究设计院,成都610063 [2]西华大学能源与动力工程学院,成都610039

出　　处：《中国农村水利水电》2021年第8期9-13,共5页China Rural Water and Hydropower

基　　金：四川省科技成果转化项目(2020ZHCG0018);四川省科研院所成果转化项目(2020JDZH0013)。

摘　　要：选择了叶轮出口直径D_(2)、叶轮出口宽度b2和叶轮进口直径D_(j) 3个因素,结合统计的污水泵优秀水力模型,得到了扬程系数λ_(H)、流量系数λ_(Q)、流速系数λv随比转数的变化规律,确定了相应的经验公式,设计出了效率高、抗堵塞性能好的双叶片污水泵。通过CFX对污水泵全流场进行数值模拟,得出了叶轮内压力、湍动能、流线分布等情况。通过样机试验得到该泵额定流量点的效率为76.53%,扬程为14 m,效率高于国家标准10%。该设计方法对双叶片污水泵水力设计具有一定参考价值。Impeller outlet diameter D_(2),impeller outlet width b2 and impeller inlet diameter D_(j) are selected,excellent hydraulic models of sewage pump are combined,the law of head coefficient λ_(H),flow coefficient λ_(Q),velocity coefficientλv changing with specific speed are obtained.The corresponding empirical formula are determined,and the double-blade sewage pump with high efficiency and good anti-clogging performance is designed.The full flow numerical simulation of the designed sewage pump is carried out by using CFX,the pressure and streamline distribution in the impeller are obtained.The efficiency of the rated flow point of the pump is 76.53%,the head is 14 meters,the efficiency is higher than the national standard 10%.The design method has some reference value for the hydraulic design of double-blade sewage pump.

关 键 词：双叶片污水泵 水力设计 回归分析 经验系数 数值计算 

分 类 号：TV136.2[水利工程—水力学及河流动力学] TH311[机械工程—机械制造及自动化]