洞巴水电站转轮空蚀介绍及原因分析

Introduction and Cause Analysis of Runner Cavitation at Dongba Hydropower Station

水轮机空蚀严重影响、威胁着机组的安全运行。洞巴水电站3台立轴混流式水轮机自2007年5月全部投入运行后,转轮、尾水管空蚀非常严重。文章对导致转轮空蚀的原因逐一进行分析,最终得出实际运行尾水位过低是主要原因,为今后水轮机选型设计及电站运行提供了宝贵经验。

The turbine cavitation severely affects and threatens the safe operation of the hydroelectric generating set.Since Dongba Hydropower Station＇s three vertical francis turbines were put into operation in May 2007,cavitation of runner and draft tube has been found very serious.The article studies the cause of runner cavitation and finds out that it is mainly caused by low tail water level,providing experience for type selection of water turbine and operation of power station in the future.