王亮，吴国栋，赵文斌，赵旭东，熊培友

(滨州渤海活塞有限公司，山东 滨州 256602)

摘要：运用有限元模拟分析对比研究了不同活塞销孔型线对销孔接触压力的影响，并进行了活塞销孔液压脉冲机械疲劳试验。结果表明：适当增大活塞销孔外侧型线收缩量，接触压力减小了约19%，且接触压力分布更均匀，通过活塞销孔液压脉冲机械疲劳试验验证了模拟分析结果的可信度，并试验确定了此柴油机活塞销孔可承受的极限载荷为24MPa。本研究对发动机活塞的销孔设计、分析计算及试验方法等方面都有重要的现实意义。

关键词：柴油机；活塞；销孔型线；疲劳试验

Abstract: Using FEA simulation, the effect of different pin bore profiles on pin bore contact pressure is analyzed. Also the pin bore hydro-pulse test has been carried out. The results show that the contact pressure reduced 19% and distribution uniformity by increasing the outside profile shrinkage properly. The reliability of simulation analysis results were verified and the limit bearable load of the pin bore is 24MPa through pin bore hydro-pulse test. This research has certain significance for pin bore design, analysis calculation and test method.

Key words：diesel；piston；pin bore profile；fatigue test