双吸式离心泵压力脉动实验研究  

Experimental Research on the Pressure Fluctuation in a Double-suction Centrifugal Pump

作　　者：王志远 李鹏辉 黄汉生[1] WANG Zhi-yuan, LI Peng-hui, HUANG Han-sheng(School of Water Resources and Hydropower Engineering, Wuhan University, Wuhan 430072, China)

机构地区：[1]武汉大学水利水电学院,武汉430072

出　　处：《中国农村水利水电》2018年第11期188-191,共4页China Rural Water and Hydropower

基　　金：国家自然科学基金资助项目(51709205);湖北省自然科学基金资助项目(2017CFB201);中央高校基本科研业务费专项资金(青年教师资助项目)(2042017kf0045);武汉大学实验技术项目(WHU-2015-SYJS-13);武汉大学教学研究项目(2018JG109)

摘　　要：在水泵综合实验台上对双吸式离心泵进行了压力脉动实验,测试了不同流量下水泵吸水室和压水室的压力脉动信号,并进行了频谱分析。结果表明,吸水室压力脉动主频频率以转频为主,在小流量工况下吸水室上部主频为3倍的转频;压水室压力脉动主频频率以叶频为主,叶频幅值大小与压水室隔舌位置具有很强的相关性。研究可为农业灌溉泵站双吸式离心泵的设计、运行提供理论依据,同时可为大学水利类及能源动力类专业的本科实验教学提供参考和启示。The pressure fluctuation in a double-suction centrifugal pump is tested on a comprehensive experimental setup.The pressure fluctuation signals of the pump suction chamber and discharge chamber under different flow rates are measured,and the frequency spectrum of the experimental results is carried out.The basic frequencies of the pressure pulsation in the suction chamber are mainly the rotational frequencies,and the basic frequencies in the upper part of the suction chamber are the triple rotational frequencies at low flow rates.The basic frequencies of the pressure pulsation in the discharge chamber are mainly the blade-passing frequencies,and the blade-passing frequency amplitudes are strongly correlated with the position of the tongue in the discharge chamber.This research can provide a theoretical basis for the design and operation of double-suction centrifugal pumps in agricultural irrigation pumping stations,and can also provide a reference for undergraduate experiment teaching of hydraulic engineering and power engineering.

关 键 词：双吸式离心泵 压力脉动 频谱分析 实验教学 

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]