1000MW核电汽轮机低压转子动叶片钎焊缺陷风险评估  

The Risk Assessment of the Low Pressure Rotor Blades Brazing Defect of 1000MW Nuclear Power Turbine

作　　者：郑忠伟 陈颖 何剑坤[2] 耿汉亭 ZHENG Zhong-wei;CHEN Ying;HE Jian-kun;GENG Han-ting(China Nuclear Power Engineering Company Limited,Beijing 100048,China;Harbin Turbine Company Limited,Harbin 150046,China)

机构地区：[1]中国核电工程有限公司,北京100048 [2]哈尔滨汽轮机厂有限责任公司,哈尔滨150046

出　　处：《汽轮机技术》2018年第4期311-314,共4页Turbine Technology

摘　　要：对国内某1000MW核电汽轮机低压动叶片司太立合金片钎焊缝检查,发现司太立合金片与叶片材料的钎焊缝存在局部贴合不良缺陷。为了进一步验证叶片的安全性,基于断裂力学评估方法,通过工程简化计算以及有限元分析两种方法对典型缺陷进行了分析评估。评估结果表明,对于所分析的载荷工况,缺陷前沿的断裂参量均小于钎焊材料缺陷疲劳扩展的门槛值,所分析的钎焊缺陷扩展风险较小。The inspection of the low pressure rotor blades of a 1000MW nuclear power turbine in China has found that there are some local unfit defects in the brazing joints of the steel-plate and blade materials. In order to further verify the safely of blades, this paper analyzes and evaluates the typical defects based on the method of fracture mechanics evaluation and the two methods of engineering simplification calculation and finite element analysis. The evaluation results show that the fracture parameters of the defect front are less than the threshold value of the fatigue extension of the soldering material for the load condition analyzed.

关 键 词：核电 汽轮机 叶片 钎焊缺陷 风险评估 

分 类 号：TK263.3[动力工程及工程热物理—动力机械及工程]