摘要
钢轨探伤车现有X-Fire探轮适用于60 kg/m钢轨检测,将其应用于75 kg/m钢轨检测时,分析发现存在的主要问题是70°晶片偏斜角设置和安装方式不合理,使得轨距角处核伤漏检,探轮膜易破损。通过理论计算及实践经验总结,对X-Fire探轮进行四项改进:改变晶片偏斜角、改变晶片入射角、改变晶片发射方向以及晶片入射点外移。对改进后探轮进行试验验证,分别用标定试块和伤损标定轨进行测试,测试结果显示改进后的探轮能够发现所有人工伤损。改进后探轮上线应用减少了轨头核伤漏检情况,并明显延长了探轮膜寿命。
The existing X-Fire RSU(Roller Search Unit)of RFD(Rail Flaw Detection)vehicles is not suitable for 75 kg/m rail detection.This inadequacy stems from two primary issues:an improperly set slew angle for the 70°transducer and its improper installation method.These deficiencies lead to adverse effects,specifically the missed detection of TDs(Transverse Defects)at the rail head gauge corner and a high susceptibility to damage of the RSU membrane.Based on theoretical calculations and practical experience,four modifications were implemented on the X-Fire RSU.Firstly,changing the slew angle of the 70°transducer.Secondly,altering the incident angle of the transducer.The third is adjusting the direction of transducer emission,and the fourth is shifting the transducer incident point outward.The improved RSU was experimentally validated using both a calibration test block and a calibration rail respectively.Test results demonstrated that the improved RSU successfully detected all artificial defects.Field application has confirmed that the new design reduces missed detections of rail head TDs and significantly extends the service life of the RSU membrane.
作者
刘丰
LIU Feng(Digital Operation and Maintenance Engineering Branch,National Energy Shuohuang Railway Development Co.Ltd.,Sunning Hebei 062350,China)
出处
《铁道建筑》
北大核心
2026年第1期44-48,共5页
Railway Engineering
关键词
探伤车
核伤
探轮
检出率
换能器
RFD vehicle
transuerse defect
detection wheel
detection rate
transducer
