CNG发动机排气门—气门座磨损失效分析  

Failure Analysis of Exhaust Valve-valve Seat Wear for CNG Engine

作　　者：胡立萍[1] 任恒[2] 周学东[3] 

机构地区：[1]中国北方发动机研究所 [2]中国人民解放军73027部队 [3]中煤平朔煤业有限责任公司

出　　处：《车用发动机》2010年第6期71-74,共4页Vehicle Engine

摘　　要：针对某CNG发动机在工作过程中出现的排气门—气门座严重磨损故障,采用宏观检验、几何学测定、化学成分测定、金相检验等手段,对该排气门—气门座的几何尺寸、金相组织、硬度等进行了检测分析,对排气门—气门座的磨损状况进行了研究。研究表明,发动机燃料、排气门—气门座材料匹配及配气系统结构设计等是影响排气门—气门座磨损失效的主要因素。提出了改善排气门—气门座磨损状况的相关措施,经试验验证,改进效果良好。For the exhaust valve-valve seat wear of CNG engine,the geometry dimension,microstructure and stiffness of exhaust valve-valve seat were detected and analyzed by the way of macro examination,geometry measurement and chemical component analysis.In addition,the wear state of exhaust valve-valve seat was studied.The results show that the engine fuel,exhaust valve-valve seat material match and valve train system structure are the main factors influencing exhaust valve-valve seat wear.In the end,the measures of improving the exhaust valve-valve seat wear are put forward and verified.

关 键 词：天然气发动机 排气门 排气门座 磨损 

分 类 号：TK413.44[动力工程及工程热物理—动力机械及工程]