通过总结三板溪水电厂机组转轮裂纹、汽蚀发生部位的特征与数量,通过机组在线监测装置数据分析机组运行特性,剖析机组转轮结构与设计特性,得出转轮裂纹发生主要原因为转轮叶片与上冠、下环连接部位较薄且应力过于集中,提出机组转轮裂纹处理及转轮叶片应力释放的处理方法。 By summarizing the characteristics and quantity of the cracks and cavitation occurrences in the runner of Sanbanxi Hydropower Plant, analyzing the operation characteristics of units and analyzing the structure and design characteristics of the runner of the unit, it is concluded that the main cause of the runner cracks is runner The connection between the blade and the upper crown and the lower ring is thin and the stress is too concentrated. The crack treatment of the rotor of the turbine and the stress release of the rotor blade are proposed.