珠江三角洲水资源配置工程取水泵站水泵选择

珠江三角洲水资源配置工程是广东省大型长距离地下管线调水工程,处在可行性研究设计阶段,三级泵站的水力参数均具有设计流量变幅大、管路摩擦损失占比大的特点。通过泵型比较确定为立式单级单吸蜗壳离心泵,该泵型在国内外可借鉴及参考的已建泵站和技术资料相对较少;管路水头损失采用二个糙率系数(0.012、0.015)计算确定水泵扬程范围,并将大糙率的计算结果作为水泵的设计扬程与最大扬程;根据水泵并联运行曲线图确定泵站的运行范围及变速运行的机组台数,设计方法与设计参数对同类型泵站的设计具有参考价值。

Pump Selection of Water Intake Pump Station in the Pearl River Delta's Water Resources Allocation Project

The Pearl River Delta`s Water Resources Allocation Project is a large-scale water diversion project with long underground water pipeline which is now in the feasibility study stage.The hydraulic parameter of three stage pump station is that the design flow`s variation and the proportion of pipeline`s friction resistance loss are large.According to the comparison of pump types, vertical singlestage one absorbing volute centrifugal pump is recommended in this paper, and the technological information and the number of existing pump station are less for referencing.The pipeline`s head loss using two roughness coefficients (0.012 and 0.015) to calculate the range of pump lift, and the result of the big roughness coefficient is used for designed head and maximum head.According to the parallel pump operating curve, the operation range of pump station and the number of pump at variable speed could be confirmed;the design method and design parameter could be referenced by the other pump station in same type.