带虹吸式流道的轴流泵超驼峰起动特性分析  

An Analysis of the Start-up Hydraulic Transient of Siphon Outlet in Pumping Stations

作　　者：梁兴[1] 胡凤城 刘梅清[2] 邓飞[1] 高刚刚 LIANG Xing;HU Feng-cheng;LIU Mei-qing;DENG Fei;GAO Gang-gang(Nanchang Institute of Technology,Jiangxi Provincial Key Laboratory of Precision Drive and Control,Nanchang 330099,Jiangxi Province,China;School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,Hubei Province,China)

机构地区：[1]南昌工程学院江西省精密驱动与控制重点实验室,江西南昌330099 [2]武汉大学动力与机械学院,湖北武汉430072

出　　处：《中国农村水利水电》2022年第10期154-157,162,共5页China Rural Water and Hydropower

基　　金：江西省教育厅科技项目(GJJ170988);国家自然科学基金项目(51969017)。

摘　　要：针对外江水位高于虹吸式出水流道驼峰底部高程下的轴流泵起动工况,选取闸门开启时间、闸门预开开度、超驼峰高度等3个影响因素建立正交试验方案,并结合瞬变流理论开展水泵起动特性研究。结果表明,超驼峰工况下,水泵扬程先快速提升至最大值后逐步减小至稳定值;闸门预开时,流量则先开始倒流,在3 s内快速变为正流量并逐步达到稳定值。最大起动扬程值主要受闸门处水力损失影响,闸门预开开度对其影响最大,闸门开启时间影响最小;而最大倒流流量受闸门预开开度影响也最大,其余两者影响较小,且权重相当。在此基础上,确定“闸门240 s全开,预开30%”作为泵的最优启动方案。Pointing to the starting phenomenon of axial flow pump when the outlet water level is higher than the bottom elevation of the hump,this paper selects three influencing factors such as gate opening time,gate pre-opening and super hump height to establish an orthogonal test scheme,and the starting characteristics of pumps are studied in combination with transient flow theory. The research shows that under the super hump condition,the pump head first quickly increases to the maximum,and then gradually decreases to the stable value;the pumping flow starts a back flow,then quickly changes to positive within 3s,and gradually reaches the stable value. The maximum starting head is mainly affected by the hydraulic loss at the gate,so the gate pre-opening has the greatest impact,the gate opening time has the least impact.The maximum backflow flow is also most affected by gate pre-opening,and the other have little influence and the same weight. At last,“the gate opened in 240 s and pre-opened by 30%”determines the optimal starting scheme of the pump.

关 键 词：超驼峰 泵站 起动过渡过程 虹吸式流道 

分 类 号：TV136.2[水利工程—水力学及河流动力学]