摘要
对大型泵站蜗壳出水流道的型线进行了多方案的优化设计和试验研究:将导水锥型线进行了优化,在流道宽度不变的条件下,仅将出水室蜗壳段弧线曲率半径适当加大,同时延长扩散管的长度,减小扩散管出口及蜗壳断面流速.最终得到了水力性能优良的蜗壳出水流道型线方案.在模型比为10.27,叶片角度(-2°)和转速(1400 r/min)都保持不变的情况下,该流道形式的模型泵装置效率达到78%以上,比优化前提高了6个百分点,达到或已超过常用流道型式立式泵装置效率,为蜗壳进出水流道在大型低扬程泵站中推广和应用奠定了基础.
After optimum hydraulic design and model test with series of schemes, the major geometrical parameters with excellent hydraulic performances are obtained for the outlet volute passages of large pumping stations. The guide-water cone was optimized by hydraulic design, and the radius of the volute curvature was increased while the width of the outlet passages was not changed and the length of expansive channel was lengthened. With the ratio （10.27） of prototype and model, blade angle （ -2°） and speed （1 400 r/min） remained unchanged, the highest efficiency of pump sets with the volute passage is over 78% , which has increased by 6% than before and has exceeded the level of vertical pump set with the commonly used structural types of inlet and outlet passages.
出处
《排灌机械》
EI
2009年第1期39-42,共4页
Drainage and Irrigation Machinery
基金
江苏省南水北调工程科技创新项目(KJCX-200804)
江苏大学高级人才科研启动基金资助项目(08JDG038)
关键词
泵站
蜗壳出水流道
流道型线
模型试验
水力损失
pumping station
volute outlet passage
passage shape
model test
hydraulic loss
