某动车组制动夹钳锁止弹簧断裂故障分析及优化  

Fracture Fault Analysis and Optimization of Lock Spring of CR200J High Speed Train Brake Clamp

作　　者：吴若鹏 陈永河 WU Ruo-peng;CHEN Yong-he(China Railway Shanghai Bureau Group Co.,Ltd,Shanghai200000,China;CRRC Nanjing Puzhen Haitai Brake Equipment Co.,Ltd,Nanjing211899,Jiangsu,China)

机构地区：[1]中国铁路上海局集团有限公司,上海200000 [2]南京中车浦镇海泰制动设备有限公司,江苏南京211899

出　　处：《机械研究与应用》2024年第1期119-122,137,共5页Mechanical Research & Application

摘　　要：针对某动车组夹钳制动单元在运行43万公里后出现锁止弹簧断裂故障的问题,该文从锁止弹簧的受力状态、断口特征、生产组装过程、试验验证等方面进行了详细的研究分析。研究表明:锁止弹簧在服役期间受到外力作用导致表面挤压伤损,形成裂纹源,继而逐步扩展,直至疲劳断裂。最后根据分析结果对现有锁止弹簧结构、材料性能进行了优化,并通过仿真分析与试验验证了产品优化方案的疲劳性能与可靠性能显著提高。In view of the locking spring fracture of the clamp braking unit in an EMU after running for 430000 km,detailed research and analysis from the aspects of stress state,fracture characteristics,production and assembly process,test verification,and so on is carried out in this paper.The results show that the fracture of locking spring is affected by external force during service,resulting in surface extrusion damage,forming crack source,and then gradually expanding until fatigue fracture.According to the analysis results,the structure and material properties of the existing locking spring are optimized,and the fatigue performance and reliability of the product optimization scheme are significantly improved through simulation analysis and test.

关 键 词：制动夹钳 锁止弹簧 断裂 

分 类 号：U266[机械工程—车辆工程]