1000MW水轮机蜗壳焊缝的TOFD检测技术应用  

Application of TOFD Detection Technology for Welding Seam of Volute of 1000 MW Turbine

作　　者：赵亮 薛兴月 王磊[1] 关帅[1] 井水益[1] 初冬清 ZHAO Liang;XUE Xingyue;WANG Lei;GUAN Shuai;JING Shuiyi;CHU Dongqing(Harbin Electric Machinery Company Ltd.,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》2022年第3期43-47,共5页Shanghai Medium and Large Electrical Machines

摘　　要：白鹤滩水轮机蜗壳制作材料采用800 MPa级高强钢,具有外形尺寸巨大且具备不同厚度焊接接头的结构特点。将超声波衍射时差法(TOFD)检测技术应用于1000 MW级混流式水轮机组的蜗壳纵向焊缝检测中,有利于提高焊缝缺欠检出率,不仅提高了检测效率,改善了工作环境,而且还大幅度的缩短了工期并减少了相关传统无损检测方法的风险等。The volute of hydraulic turbine of Crane Beach Hydropower Station is made of 800 MPa high-strength steel,which has the structural characteristics of huge overall dimensions and welded joints with different thicknesses.The application of ultrasonic time-of-flight diffraction(TOFD)detection technology to the longitudinal welding seam detection of volute of 1000 MW Francis turbine helps to improve the detectable rate of defective welding seam,which not only enhances the detection efficiency,improves the working environment,as well as also greatly shortens the construction period and reduces the risks of relevant traditional nondestructive testing methods.

关 键 词：白鹤滩水电站 蜗壳 缺欠 衍射时差法检测 无损检测 

分 类 号：TM312[电气工程—电机]