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| 大功率柴油机曲轴飞轮圆锥过盈联结设计方法 |
| 班平宝,李向荣,何剑丰,谢亮,刘福水,马维让 |
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| 北京理工大学机械与车辆学院,北京100081;华北柴油机有限公司,河北石家庄050000;北方通用动力集团,天津300380 |
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| 摘要:针对某型柴油机螺栓端面压紧联结方式在发动机功率进一步强化时发生了部分螺栓松脱、甚至螺栓和定位销被剪断的情况,对该联结方式做了改进,将原先的端面压紧联结改为圆锥过盈联结。通过经典弹性力学方法计算出合理的过盈量以保证联结的可靠性；同时采用有限元仿真软件ABAQUS得到了连接面接触应力的分布情况,验证了过盈量的合理性；分析了危险区域的应力集中现象,提出了降低应力集中的优化方案。 |
| 关键词: 大功率柴油机 飞轮 联结 有限元方法 |
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| Design Method for Cone Interference Fit between Flywheel and Crankshaft of Heavy Duty Diesel Engine |
| Ban Pingbao,Li Xiangrong,He Jianfeng,Xie Liang,Liu Fushui,Ma Weirang |
| School of Mechanical and Vehicular Engineering,Beijing Institute of Technology,Beijing 100081;Huabei Diesel Engine Co.,Ltd.,Hebei Shijiazhuang 050000;China North General Power Group Co.,Ltd., Tianjin 300380 |
| Abstract:With the continuously strengthening of a certain diesel engine, the bolt joint between flywheel and crankshaft met the problems that part bolts loosened, sometimes the bolt and locating pin were even cut off. To deal with this problem, the joint method was improved, and changed the original bolt joint to cone interference fit. The effective interference value was calculated by the classic formula of Stretch Mechanics in order to guarantee the reliability of the interference fit. Meanwhile, the distribution of contact stress and strain was obtained by finite element method which verified the rationality of the interference value. Moreover, the stress concentration phenomenon appeared in the dangerous area was analyzed and optimization scheme to decrease the stress concentration was proposed based on ABAQUS. |
| Key words: large power diesel engine flywheel cone interference fit finite element method〖FL |