水轮机转轮根切现象研究及预防  

Research and prevention of undercutting phenomenon of turbine runner

作　　者：李鑫[1] 刘向海[1] LI Xin;LIU Xianghai(Harbin Electric Machinery Company Limited,Harbin 150040,China)

机构地区：[1]哈尔滨电机厂有限责任公司,哈尔滨150040

出　　处：《上海大中型电机》2024年第2期21-24,共4页Shanghai Medium and Large Electrical Machines

摘　　要：混流式水轮发电机组生产制造过程中,需手工打磨转轮叶片与上冠、下环之间的焊缝。在打磨焊缝过程中,易产生根切现象影响工件质量。本文对混流式转轮根切现象进行了全面的分析及研究,特别针对根切的预防措施做了详细介绍,极大程度减少了根切现象的产生,具有积极的指导意义及推广价值。In Francis turbine set,the weld between the blade of the main turbine runner and the upper crown and lower ring must be ground to a round corner with a certain size by hand and get smooth transition with base material to prevent stress concentration.In the process of grinding the weld,it is easy to produce undercutting phenomenon,which will affect the quality of the workpiece.In this paper,the undercutting phenomenon of Francis runner is analyzed and studied comprehensively,especially the preventive measures of undercutting are introduced in detail,which greatly reduces the undercutting phenomenon and has positive guiding significance and popularization value.

关 键 词：根切 转轮 焊缝 打磨 混流式 

分 类 号：TM312[电气工程—电机]