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力学与实践 ›› 2004, Vol. 26 ›› Issue (3): 0-0.doi: 10.6052/1000-0992-2003-054

• 应用研究 •    

气缸垫对机体受力和缸套变形影响的实验研究

沈晓雯 钱湘群 盛奎川 寇淑清   

  1. 浙江大学生物系统工程与食品科学学院 310029 浙江大学生物系统工程与食品科学学院 310029 浙江大学生物系统工程与食品科学学院 310029 浙江大学生物系统工程与食品科学学院 310029
  • 收稿日期:2003-01-29 修回日期:2003-08-21 出版日期:2004-06-10 发布日期:2004-06-10

EXPERIMENTAL STUDY ON CYLINDER WASHER'S EFFECT ON ENGINE BLOCK STRESS AND CYLINDER LINER DISTORTION FOR DIESEL ENGINE

  • Received:2003-01-29 Revised:2003-08-21 Online:2004-06-10 Published:2004-06-10

摘要: 某四缸柴油机在试制中出现机体裂纹现象,为保证内燃机正常工作,机体 裂纹问题急待处理. 应用力学理论对此进行分析,得出机体裂纹是由机体受力不均匀引起的 结论. 同时采用实验应力分析方法,对两种四缸柴油机机体进行了对比实验研究,在实验中 发现了缸垫对机体受力和缸套变形的影响, 从而提出了一种有效的改进方法,使机体的 应力有明显下降,并不再出现裂纹,也未出现漏油、漏气和活塞拉缸等不良现象,大大提高 了产品可靠性.

关键词: 应力, 气缸垫, 机体

Abstract: During the trial production of a four-cylinder diesel engine, cracks occurred on a cylinder block. In order to ensure the engine's safe working, the issue must be solved. In this paper, mechanics theory is applied to analyse the issue and it is concluded that the cracks were caused by uneven forces acting on the block. At the same time, the experimental stress anlysis is carried out to study two types of four-cylinder engine blocks, and the effect of cylinder washer on block's stress and cylinder sheath's distortion is found. So a method is given to reduce the block's stress and the cracks have not appeared again. Oil-leak, air-leak and cylinder scratch have not occurred either, and reliability is improved greatly.

Key words: stress, cylinder washer, engine block