某电动车低温散热器排气管断裂分析  

Fracture Analysis of Exhaust Pipe of Low-temperature Radiator of an Electric Vehicle

作　　者：张冲子 ZHANG Chong-zi(Chongqing SERES New Energy Vehicle Design Institute Co.,Ltd.Range Extender System Department,Chongqing 401335,China)

机构地区：[1]重庆赛力斯新能源汽车设计院有限公司增程系统部,重庆401335

出　　处：《汽车科技》2024年第1期70-75,共6页Auto Sci-Tech

摘　　要：本文以某电动车低温散热器排气管在路试过程中断裂为例进行故障分析,通过对排气管断口电镜分析确定了裂纹性质及断裂初步原因。然后使用故障树分析法(FTA)工具,通过生产过程排查,确定了外力磕碰风险原因;通过对原材料进行红外光谱检测、灰分检测及电镜分析,确定使用了回用料原因;通过对散热器排气管应力模拟分析、轴向强度检测试验,确定了结构不良原因。针对以上原因制定了相应的整改措施,解决了散热器通气管断裂的故障问题。对汽车从业人员在同类尼龙结构在整车上的设计、原材料使用及故障分析工作有一定指导意义。This paper takes the failure analysis of the fracture of the exhaust pipe of a low-temperature radiator of an electric vehicle during the road test process,the fracture electron microscopy analysis of the exhaust pipe was used to determine the crack properties and the preliminary cause of the fracture.then,using the fault tree analysis(FTA)tool,the cause of the risk of external collision was determined through the production process troubleshooting;through infrared spectroscopy,ash detection and electron microscopy analysis of raw materials,the reason for the use of recycled materials was determined;through the stress simulation analysis of the exhaust pipe of the radiator and the axial strength test of the radiator,the cause of the structural defect was determined.In view of the above reasons,corresponding corrective measures were formulated to solve the fault problem of broken radiator snorkel.It has certain guiding significance for automobile practitioners in the design,raw material use and failure analysis of similar nylon structures on the whole vehicle.

关 键 词：低温散热器 断裂 电镜分析 故障树分析法 红外光谱检测 应力模拟分析 

分 类 号：U465[一般工业技术—材料科学与工程]