| 摘要:针对某型机高压油管使用中冷镦接头发生断裂的原因进行分析。分析表明:断裂方式为疲劳断裂,并在此基础上针对疲劳裂纹萌生及扩展两大影响零件疲劳寿命的主要因素进行了分析。结合疲劳裂纹萌生及扩展的基本理论,提出了改善高压油管疲劳性能的生产工艺改进措施。 |
| 关键词: 柴油机 高压油管 冷镦接头 疲劳断裂 |
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| Analysis of the Fracture of a Diesel Engine High Pressure Fuel Pipe’s Cold Heading Joint |
| Wang Yanbing,Hu Guangyun,Song Yali,Liu Lijun |
| Hudong Heavy Machinery Co., Ltd., Shanghai 200129;Shanghai Jiao Tong University, Shanghai 200240 |
| Abstract:Aiming at the fracture of the high pressure fuel pipe’s cold heading joint on a diesel engine, it is firstly identified that the damage of the pipe is due to fatigue fracture. And then the crack initiation and growth which are the two main factors influencing fatigue life are analyzed. Finally, combined with the fatigue theory, the manufacturing technical solutions on how to improve high pressure fuel pipes’anti-fatigue performance are proposed . |
| Key words: diesel engine high pressure fuel pipe cold heading joint fatigue fracture〖FL |
