某混流式机组转轮裂纹原因分析及处理措施  

Runner Crack Analysis and Treatment for A Francis Turbine

作　　者：张美琴[1] 张树邦[1] 宫让勤[1] 高海军[1] ZHANG Meiqin;ZHANG Shubang;GONG Rangqin;GAO Haijun(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：《大电机技术》2020年第3期56-61,共6页Large Electric Machine and Hydraulic Turbine

基　　金：2017年第二批国家“万人计划”科技创新领军人才特殊支持经费。

摘　　要：本文对某混流式水轮机转轮近5年出现裂纹的位置和数量迚行了统计,研究了裂纹发展的趋势和规律。从转轮的选型设计、结构设计、铸造材料、叶片强度、制造工艺、运行特性以及裂纹修复等形成裂纹的各个方面迚行了裂纹原因分析。针对裂纹形成的原因,提出了局部加强叶片强度和改迚叶片裂纹修复工艺的处理措施及相兲预防措施。为有效控制和减少水轮机转轮裂纹的发生提供一定的参考。In this paper, the location and quantity of the cracks in the runner of a Francis turbine in recent 5 years have been counted, and the trend and law of crack development have been studied. The causes of the crack are analyzed from the aspects of type selection design, structural design, casting material, blade strength, manufacturing process, operation characteristics and crack repair. In view of the causes of crack, the measures to strengthen the blade strength locally and improve repair technology of the blade crack are put forward, which can provide certain measures for controlling and reducing crack of the turbine runner.

关 键 词：混流式水轮机 转轮 裂纹 原因分析 处理措施 

分 类 号：TK730.3[交通运输工程—轮机工程]