大范围降速对立式离心泵装置特性的影响  

Experimental Investigation on the Influence of Large-scale Speed Reduction on Characteristics of Vertical Centrifugal Pump

作　　者：翟光耀 王志远[2] 朱劲木 龙新平[2] ZHAI Guang-yao;WANG Zhi-yuan;ZHU Jin-mu;LONG Xin-ping(Guangdong Yuehai Pearl River Delta Water Supply Co.,Ltd.,Guangzhou 511458,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)

机构地区：[1]广东粤海珠三角供水有限公司,广东广州511458 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《水电能源科学》2021年第11期195-198,共4页Water Resources and Power

基　　金：国家自然科学基金项目(51709205);珠江三角洲水资源配置工程课题研究(ZSJ-XMKT-2020-0024)。

摘　　要：鉴于离心泵大范围降速运行有可能应用于跨流域与区域调水工程中的研究不多的问题,开展了大范围降速对水泵装置性能和压力脉动特性影响的试验研究。结果表明,立式离心泵转速大范围降低,性能曲线形状相似度降低;机组最优效率降低明显,0.40倍额定转速下的最优效率降至额定转速下最优效率的0.68倍;压力脉动随转速大范围降低而大幅度降低,水泵出口压力脉动较进口降低明显,0.40倍额定转速下最优效率工况水泵出口的压力脉动降低至额定转速下压力脉动的1/9。研究结果可为调水工程立式离心泵的设计、运行提供参考。Due to the complexity of the characteristics of inter-basin and regional water transfer projects,it is possible for centrifugal pumps to operate at reduced speeds in a large scale,while the related research is few.In this paper,an experiment was carried out to study the effect of a large-scale speed reduction on the performance and pressure fluctuation of a vertical centrifugal pump.The results show that the shape similarity of the performance curve of the pump decreased as the vertical centrifugal pump speed reduced in a large range;The optimal efficiency of the unit reduced significantly,and the optimal efficiency at 0.4 times of the rated speed reduced to 0.68 times of that at the rated speed;The pressure fluctuation is greatly reduced with the large-scale speed reduction of the pump,the pressure fluctuation in the outlet of the pump decreased more obviously than that in the inlet,and the pressure fluctuation at 0.4 times of the rated speed under the optimal efficiency condition reduced to 1/9 of that at the rated speed in the pump outlet.This paper can provide reference for the design and operation of vertical centrifugal pumps in water transfer projects.

关 键 词：立式离心泵 大范围降速 性能 压力脉动 

分 类 号：TV136[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]