莒头泵站轴流泵前置导轮的设计与试验

Design and Test of Front Guide Impeller for Axial Flow Pump of Jutou Pumping Station

首次将前置导轮用于莒头泵站２８ＺＬＢ－７０型轴流泵中，以解决该站春秋两季低水抗旱时因转轮淹深不足引起的汽蚀、振动和噪声问题．介绍了该泵导轮的设计配套方法、现场试验结果，该法技术上的成功，证实了用导轮来防治轴流泵汽蚀或解决转轮淹深不足问题已完全可行．

A so called front guide impeller installed in the entrance of the axial flow impeller is firstly applied in 28ZLB-70 type axial flow pump of Jutou Pumping Station,so as to eliminate cavitation,noise and vibration of the pump for lack of enough submergence.The design method of the front guide impeller and results of the field test on the pump with the front guide impeller are described.The successful experiment proves that the way is efficacious.