内燃机车主发电机磁极螺栓超声波探伤  

Ultrasonic Flaw Detection of Magnetic Pole Bolt of Main Generator of Diesel Locomotive

作　　者：常亮 Chang Liang(CRRC Lanzhou Locomotive Co.LTD.Quality assurance Department,Gansu Lanzhou 730070)

机构地区：[1]中车兰州机车有限公司质量保证部,甘肃兰州730070

出　　处：《内燃机与配件》2024年第9期111-113,共3页Internal Combustion Engine & Parts

摘　　要：螺栓在使用过程中受到交变载荷的作用,在螺纹部位容易产生疲劳性裂纹,而由于内燃机车主发电机磁极螺栓进行不拆卸检修,无法采用磁粉探伤的方法验证螺栓螺纹的表面状态。为保证磁极螺栓螺纹表面质量,本文采用10MHzΦ8纵波直探头在螺栓螺帽端面进行超声波检测,能发现螺栓螺纹部位1mm以上的裂纹类缺陷,获得了很好的检测效果。The bolt is subjected to alternating load during use,which is easy to produce fatigue cracks in the thread parts.Because the magnetic pole bolt of the engine owner's generator is not disassembled and repaired,the surface state of the bolt thread cannot be verified by MT.In order to ensure the surface quality of magnetic pole bolt thread,this paper adopts 10MHzΦ8 longitudinal wave probe to carry out UT on the end face of bolt nut.Cracks above 1mm of bolt thread can be found,and good detection results are obtained.

关 键 词：超声波探伤 磁极螺栓 裂纹检测 

分 类 号：U26[机械工程—车辆工程]