地铁齿轮箱吊杆失效分析与对策研究  

Failure Analysis and Countermeasure Research of Subway Gearbox Suspension Rod

作　　者：徐晓东[1] XU Xiaodong(School of Mechanical Engineering and Rail Transit,Changzhou University,Changzhou 213164)

机构地区：[1]常州大学机械与轨道交通学院,常州213164

出　　处：《现代制造技术与装备》2023年第11期129-131,150,共4页Modern Manufacturing Technology and Equipment

摘　　要：通过宏观观察、微观观察、金相分析等方法研究某断裂的地铁齿轮箱吊杆,探讨该齿轮箱吊杆断裂原因,并建立有限元模型,对该吊杆进行受力分析。结果表明,吊杆断裂性质为疲劳破坏,该破坏形式与吊杆在地铁运行时疲劳寿命裕度偏低有关,且表面浅层脱碳对吊杆疲劳断裂起到促进作用,据此提出相应的解决方案。By means of macroscopic inspection,microscopic observation and metallographic analysis,this paper studies the fracture reason of a broken gear box boom in subway,and establishes a finite element model to analyze the force of the boom.The results show that the fracture property of the boom is fatigue failure,which is related to the low fatigue life margin of the boom during subway operation.The decarburization of the shallow surface layer promotes the fatigue fracture of the boom,so the corresponding solution is put forward.

关 键 词：齿轮箱吊杆 失效分析 疲劳断裂 

分 类 号：U270.3[机械工程—车辆工程]