前置竖井式贯流泵装置进出水流道水力设计标准化

借鉴水轮机尾水管水力设计标准化的成功经验, 为使优秀的前置竖井式贯流泵装置在我国低扬程及特低扬程 泵站得到更多更好地应用, 对前置竖井式贯流泵装置流道水力设计标准化进行了较为深入地研究。按满足工程应 用实际需要和分档方案不过于繁多的原则, 在常用值取值范围内对进、出水流道水力设计系列方案进行合理分档; 以竖井宽度和水泵名义平均流速为关键参数, 将进水流道划分为 24 种水力设计标准化方案; 以出水流道出口断面宽度和水泵名义平均流速为关键参数, 将出水流道划分为 17 种水力设计标准化方案; 经优化水力设计计算, 所述进水流道 24 种方案和出水流道 17 种方案的水力性能优异。前置竖井式贯流泵装置流道水力设计标准化研究工作在国内外尚属首次, 对提高低扬程泵站的设计水平具有重要意义。

Hydraulic design standardization for inlet and outlet conduit of tubular pump system with front-positioned shaft

Learning from the successful experience of hydraulic design standardization of water turbine drafttube, the excellent tubular pump system with front-positioned shaft are used for more and better in the pumping station with low head and extra low head. Therefore, the standardization of hydraulic design for conduits of tubular pump system with front-positioned shaft has been premeditated in depth. The statistical rules of conduit sizes of the tubular pump with front-positioned shaft are analyzed, and the series of hydraulic design schemes for the inlet and outlet conduits are reasonably graded. Taking the shaft width and the nominal average velocity of the pump as key parameters, 24 schemes of hydraulic design standardization of the inlet conduit are obtained. Furthermore, 17 schemes of hydraulic design standardization of the outlet conduit are obtained by taking the outlet section width of the outlet conduit and the nominal average velocity of the pump as key parameters. According to the results of the optimal hydraulic design calculation, the hydraulic performances of the 24 inlet conduit schemes and the 17 outlet conduit schemes are excellent.The hydraulic design standardization for the inlet and out let conduit of tubular pump system with the front-positioned shaft is studied for the first time at home and abroad, and it is of great significance to improve the design level of pumping stations with low head.