汽轮发电机水接头钎焊缝超声检测方法  

Ultrasonic Detection Method for Brazing Seam of Turbogenerator Water Joint

作　　者：张巍[1] ZHANG Wei(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48-50,54,共4页Shanghai Medium and Large Electrical Machines

摘　　要：水接头是水冷型汽轮发电机定子线圈重要的水路元件。采用双晶探头检测水接头钎焊缝时,可以将焦点置于焊缝位置,可提高检测分辨力,同时可以屏蔽水层反射信号,使缺陷信号更加易于识别和评定。以不锈钢管外壁反射信号为基准校准检测灵敏度,通过对比缺陷的测量结果与其实际尺寸的一致程度,表明采用双晶聚焦探头水浸法检测水接头钎焊缝具有较好的准确性和实用性。Water joint is an important waterway element of stator coil of water-cooled turbogenerator.When the double crystal probe was used to detect the brazing seam of water joint,the focus could be placed at the welding seam position,which could improve the detection resolution and shield the reflected signal of water layer,so that the defect signal was easier to be identified and evaluated.The detection sensitivity is calibrated based on the reflection signal from the outer wall of the stainless steel tube,by comparing the consistency between the measurement results of the defect and its actual size,it was shown that the water immersion method of the double crystal focusing probe has good accuracy and practicability for detecting the brazing seam of the water joint.

关 键 词：汽轮发电机 水接头 钎焊 双晶探头 

分 类 号：TM311[电气工程—电机]