对旋全贯流泵首次级叶轮转速匹配试验研究  

Experimental study on speed matching of first and secondary impellers of contra-rotating full tubular pump

作　　者：王邦胜 林彬 赵国辉 赵付建 WANG Bangsheng;LIN Bin;ZHAO Guohui;ZHAO Fujian(Guangdong Leike Pump Technology Co.,Ltd.,Foshan 528200,China;Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang 201306,China)

机构地区：[1]广东力科泵业科技有限公司,广东佛山528200 [2]江苏大学流体机械工程技术研究中心,江苏镇江201306

出　　处：《水力发电学报》2023年第6期73-79,共7页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金(U20A20292)。

摘　　要：本文以潮汐发电的双电机驱动对转全贯流泵为研究对象,其首级和次级叶轮采用相同的结构形式,重点对其水泵工况下对旋转子的转速配比进行试验研究。结果表明:在两级叶轮同转速下,次级叶轮扬程整体高于首级叶轮,但首级叶轮轴功率更低,叶轮的效率更高;在两级叶轮不同转速下,在小流量工况扬程曲线没有驼峰出现,泵的效率明显提高,且其水力高效区向设计流量点偏移,泵的扬程和功率与次级叶轮的转速呈线性正相关的关系,叶轮的轴功率主要和对应的流量和转速有关,可通过次级叶轮的变转速来实现首次级叶轮等功率运行,避免次级叶轮的电机出现过载现象。因此对提高对旋全贯流泵的水力性能和安全稳定运行具有重要的理论意义和实用价值。This paper presents an experimental study of a dual-motor driven contra-rotating full tubular pump for tidal power generation.The first and secondary impellers of this pump adopt the same structural form,and the speed ratio of their rotators in pumping mode is examined.The results show that at the same rotational speed of the two-stage impellers,the overall head of the second stage is higher than that of the first stage,but the latter has lower shaft power and higher efficiency.At different rotational speeds of the two impellers,no hump occurs in the lift head curve of low flow conditions;the pump efficiency is improved significantly with its high hydraulic efficiency zone shifted towards the design flow point.The lift head and power of the pump are linearly related to the rotational speed of its secondary impeller;its shaft power is mainly related to the corresponding flow rate and rotational speed.A variable rotational speed can be applied to the secondary impeller to achieve an operating power equal to that of the first-stage so as to avoid the overload of its motor.The results are of great theoretical and practical significance to the hydraulic performance and the safe and stable operation of full tubular pumps.

关 键 词：潮汐发电 对旋全贯流泵 水泵工况 对旋转子 转速匹配 

分 类 号：TH311[机械工程—机械制造及自动化]