动车组探针式温度传感器失效分析及改进验证  

Failure Analysis and improvement Verification of Probe Temperature Sensor for EMU

作　　者：张燕亮 顾忠辉 郑华雄 吕阳 刘丹 柯飙 ZHANG Yanliang;GU Zhonghui;ZHENG Huaxiong;LV Yang;LIU Dan;KE Biao(Ningbo CRRC Times Transducer Technology Co.,Ltd.,Ningbo 315021,China)

机构地区：[1]宁波中车时代传感技术有限公司,浙江宁波315021

出　　处：《传感器世界》2023年第4期1-8,共8页Sensor World

基　　金：国家重点研发计划(No.2021YFB3203200)。

摘　　要：探针式温度传感器实时反馈动车组轴箱、齿轮箱及电机等关键部件的温升信息,保障行车安全。因安装环境的限制,传感器探针在恶劣振动工况下易产生疲劳失效,存在安全隐患。首先,对某型高速动车组上探针式温度传感器断裂失效现象进行分析;随后,提出结构优化方案,调整焊缝位置及焊接工艺,增大探针受力面。为了验证优化前后结构可靠性,基于Dirlik频域疲劳计算理论,建立结构优化前后有限元模型对关键薄弱位置进行振动疲劳分析,并通过振动试验验证了结构优化效果。The probe temperature sensor feedbacks the temperature rise information of the core components such as axle box,gearbox and motor of EMU in real time to ensure the traffic safety.Due to the limitation of installation environment,the sensor probe is prone to fatigue failure under harsh vibration conditions,which is harmful to traffic safety.Firstly,the paper analyzes the failure phenomenon of probe temperature sensor on a high-speed EMU.Subsequently,the structural optimization scheme was proposed to adjust the weld position and welding process,and increase the force surface of the probe.In order to verify the reliability of the structure before and after optimization,based on the Dirlik frequency domain fatigue calculation theory,the finite element model of the structure was established to carry out the vibration fatigue analysis on the key weak positions,and the structural optimization effect was verified through the vibration test.

关 键 词：高速动车组 温度传感器 振动疲劳 结构优化 可靠性 

分 类 号：U270.7[机械工程—车辆工程]