龙羊峡水电厂机组转轮裂纹成因分析

Runner Crack Analysis of Longyangxia Hydropower Plant

水轮机在高水头低负荷区域运行时容易出现不稳定流动,从而引起过流部件的压力脉动,这是转轮产生裂纹的原因之一。文章结合龙羊峡机组的运行情况分析了水轮机在高水头运行时的特性,对机组转轮产生裂纹的原因提出了解决方案。

When hydraulic turbine operates under high waterhead and low load area, it is easy to occur unstable flow and thus induces flow passage component＇ s pressure fluctuation, and this is one of reason of runner crack. Combining with the operation situation of Longyangxia hydropower plant units, the paper analyses the hydraulic turbine characteristic under high water - head operation, and puts forward the solution based on the reason of runner cracl.