摘要
铁路提速、重载后,240/275系列柴油机钢顶铝裙组合活塞出现了裙裂损、环槽磨损过快等严重质量问题。为提高该活塞的寿命,通过一系列研究和试验,查明活塞失效的主要原因是由于活塞结构不合理局部应力集中而导致严重的活塞裙疲劳破坏。同时还给出了活塞环槽磨损过快的四个主要因素。通过结合仿真分析的一系列试验,设计了一种新结构活塞。目前,大量的新结构活塞已经安全运行60万km以上。
In order to deal with the severe cracks created in the piston skirt and the rapid over-wear happened in piston ring grooves of some pistons, which is composted of a steel crown and an aluminum skirt, in 240/275 series diesel engines, and to increase its working life, the conclusion about piston failures has been found out by a series of researching and testing. First, the failure mode is fatigue damage, which is caused by the stress concentration due to unreasonable structure. Second, the reason of rapid over-wear in piston ring grooves is caused by 4 main factors. Based on the analysis above and a series of tests combined with FEA simulation, a new design scheme of this kind of piston has been obtained. Up to now, a lot of these new pistons have safely run over 600,000 km.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2005年第5期66-68,共3页
Chinese Internal Combustion Engine Engineering
关键词
内燃机
钢顶铝裙活塞
失效分析
有限元数值仿真
试验
I. C. Engine
Steel Crown and Aluminum Skirt Piston
FailureAnalysis
FEA Simulation
Test
作者简介
杨英（1964-），男，教授级高工，主要研究方向为机车柴油机产品开发及其可靠性研究，E-mail：lyangying@163．com。
