| 摘要:采用显示动力学算法对柴油机喷油器针阀落座时的冲击过程进行动态仿真计算,得到针阀落座过程中的应力分布以及冲击力和能量变化关系；分析落座速度对冲击应力的影响。与公式计算法的结果对比表明:该方法具有更高的精度,可用于指导喷油器的改进设计。 |
| 关键词: 柴油机 喷油器 针阀 冲击应力 显式动力学 |
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| Analysis of Impact Stress During the Collide Process of Fuel Injector’s Needle Valve for Diesel Engine |
| Zhang Huabing,Chen Zhizhong,Xu Jianxin |
| Shanghai Marine Diesel Engine Research Institute, Shanghai 201108 |
| Abstract:Based on explicit dynamic method, the impact stress during the collide process of fuel injector’s needle valve for diesel engine was simulated. According to the results, stress distribution, impact energy and force transformation were obtained. The influence of the velocity when crashing to the valve base on impact stress was studied. Compared with the results of mathematical formula, this method is more precise and can be used to improve the design of the injector. |
| Key words: diesel engine fuel injector needle valve impact stress explicit dynamics〖FL |
