| 摘要:针对某型增压柴油机缸盖水套开裂问题，通过断口、能谱、金相分析以及常规机械性能测试，结合失效区域的工作条件，得出疲劳开裂为热负荷与机械负荷共同作用导致的结论。在此基础上提出了改善水套流量分布，增加楔形加强筋的改进方案。有限元分析表明:改进后的缸盖疲劳安全系数提高了10%。优化后的缸盖已成功应用于该型国四、国五发动机上。 |
| 关键词: 缸盖水套 开裂 优化 |
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| Analysis and Optimization of the Cracking Cylinder Head Water Jacket |
| Wen Shiping,Ma Chao,Gao Weijin,Liu Yong,Shi Yong |
| Jiangling Motors Co.，Ltd.，Jiangxi Nanchang，330001 |
| Abstract:To solve the cracking problem of a certain type of cylinder head water jacket of a turbocharged diesel engine, through fracture, energy spectrum, metallographic analysis and conventional mechanical performance test, combined with the work conditions of the failure area, the conclusion that the cracking was caused by both the thermal load and the mechanical load were obtained. The improvement solution including the flow distribution optimization of the water jacket and increasing the wedge reinforcement was put forward. The finite element analysis show that the fatigue safety factor of the optimized cylinder head is increased by 10%, and has already applied on the china IV and V engine successfully. |
| Key words: cylinder head water jacket cracking optimization |
