柴油机增压器与排气歧管结合面漏气改进措施  

Analysis and Solution to Gas Leakage between Exhaust Manifold and Turbocharger

作　　者：邢正双[1] 张兆明[1] 曾斌[1] 张萌[1] 

机构地区：[1]上海汽车集团股份有限公司/上海市汽车动力总成重点实验室,上海201804

出　　处：《柴油机设计与制造》2017年第1期22-25,共4页Design and Manufacture of Diesel Engine

摘　　要：某研发阶段的四缸柴油机在台架试验过程中,增压器与排气歧管结合面经常发生漏气现象。经分析主要原因为增压器垫片设计存在缺陷以及增压器垫片、增压器螺柱与螺母材料选择不合适,无法满足增压器与排气歧管在高温恶劣环境下的密封条件,最终导致密封失效而发生漏气。因此,对增压器垫片设计及垫片、螺柱与螺母材料进行改进,最终解决了增压器与排气歧管法兰结合面漏气问题。Gas is often found to leak out at the i nterface between the exhaust manifold and the turbocharger of a 4-cylinder diesel engine under development while being put through bench tests. A close analysis suggests that, besides design defects of the gasket, wrong materials for the gaskets, studs and nuts are also among main causes for the leakage, failing to meet the sealing requirements for the turbocharger and the exhaust manifold operating under harsh, high temperature working conditions. A proved solution to the trouble is to improve on structural designs and materials of the gaskets, studs and nuts.

关 键 词：柴油机 垫片 结合面 设计缺陷 材料改进 

分 类 号：TK423[动力工程及工程热物理—动力机械及工程]