全贯流泵装置外特性试验研究--以龙昆沟北雨水排涝泵站为例  

Experimental Research on the External Characteristics of the Full-flow Pump in Longkungou North Rainwater Drainage Pumping Station

作　　者：刘健峰 陆伟刚[1] 周秉南 孙晨光 夏辉[3] LIU Jian-feng;LU Wei-gang;ZHOU Bin-nan;SUN Chen-guang;XIA Hui(College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou 225009,Jiangsu Province,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China;Jiangsu Surveying and Design Institute of Water Resources Co.,Ltd.,Yangzhou 225127,Jiangsu Province,China)

机构地区：[1]扬州大学水利科学与工程学院,江苏扬州225009 [2]南京水利科学研究院,南京210029 [3]江苏省水利勘测设计研究院有限公司,江苏扬州225127

出　　处：《中国农村水利水电》2022年第8期182-188,194,共8页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(51779215,52079120)。

摘　　要：为检验和进一步的了解全贯流泵装置的水力性能,以龙昆沟北雨水排涝泵站为例,对其泵装置的外特性进行模型试验研究并分析和数据评估。龙昆沟北雨水排涝泵站全贯流泵原型装置效率在叶片安放角固定在+2°时,水泵装置的运行流量为15.35 m^(3)/s,此时扬程能够达到2.16 m,效率达到峰值:65.25%。该全贯流泵装置在各个试验工况内,其装置汽蚀余量充裕。该装置最大扬程对应的飞逸转速为216 r/min,即等于1.49倍的额定转速,满足了水泵安全运行要求。在原方案设计扬程工况下,泵装置的运行效率偏低,不满足泵站的设计运行效率要求。而在调整了叶轮外壳与叶轮外圈之间的间隙后,泵装置设计扬程对应的装置外特性均能满足实际泵站运行要求。全贯流泵装置尺寸小、结构紧凑且水力性能优异,对于低扬程大流量泵站具有较高的适用性,可考虑采用。The full-flow pump is a new mechatronics product combining tubular pump technology and submersible motor technology and the purpose of this paper is to test the hydraulic performance of the full-flow pump device and understand the real operation status of the pump‐ing station.To study the external characteristics of the full-flow pump device with model test,this paper takes Longkungou North rainwater drainage pumping station as an example and then analyzes and evaluates relevant data.When the blade angle is fixed at+2 degrees,the max‐imum efficiency of the prototype device is 65.25%,when the flow rate is 15.35 m^(3)/s and the head is 2.16 m.Within the range of test head,the NPSH of Longkungou North rainwater drainage pumping station is sufficient,which will not cause cavitation hazards.The runaway speed corresponding to the maximum head is 216 r/min,which is 1.49 times of the rated speed.Under the condition of original design head,the op‐eration efficiency of the pump device is low,which does not meet the designed efficiency requirements of the pump station and it’s verified that the energy characteristics,cavitation characteristics and runaway speed characteristics corresponding to the design head of the pump de‐vice can meet the requirements after the clearance is adjusted between the impeller shell and the impeller outer ring and reducing the preci‐sion error of model test.The size of full-flow pump is relatively small and it has a compact structure and excellent hydraulic performance,which has a good prospect and can be adopted in low head and large flow pump stations.

关 键 词：全贯流泵 泵装置 模型试验 外特性 低扬程大流量泵站 

分 类 号：TV131.63[水利工程—水力学及河流动力学] TV675