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。
During the trial production of a four-cylinder
diesel engine, cracks occurred on a cylinder block. In or-
der 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 dis-
tortion 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.
出处
《力学与实践》
CSCD
北大核心
2004年第3期30-32,共3页
Mechanics in Engineering
