内燃机气门-座圈摩擦副磨损机制的实验研究  

Study on Wear Mechanism of Engine Valve-seat Friction Pair

作　　者：高群钦[1] 陈安宇[1] 

机构地区：[1]解放军汽车管理学院,安徽蚌埠233011

出　　处：《润滑与密封》2009年第5期76-78,共3页Lubrication Engineering

摘　　要：通过台式实验装置模拟内燃机气门与座圈的负荷环境和接触条件,采用三角形负荷波形研究了燃烧负荷对气门和座圈磨损的影响,采用正弦波位移,并采用类似于在摩擦滑动试验中所采用的峰值负荷,研究了当气门关闭时,气门对座圈的冲击以及燃烧负荷的影响,分析了气门与座圈的磨损机制和气门与座圈磨损的主要影响因素。研究表明,气门与座圈的磨损包括2种不同的机制:气门关闭时的落座冲击和燃烧压力作用下气门在座圈上的滑动,并且磨损的主要机制与气门的关闭速度、燃烧负荷、气门相对气门座圈的不对中度以及气门和座圈的材料选择等工作状态有关。By simulating the load environment and contact condition of engine valve and seat with bencn test, the influence of the combustion load on the wear of valve and seat was studied using triangular load waveform. The impact of valve on seat and the influence of combustion load were studied when the valve is off by adopting the sinusoidal displacement and peak load which is similar to that used in sliding friction test. The wear mechanism and the influence factors of valve and seat wear were analyzed. The results show that the wear between valve and seat includes two different mechanisms, valve impact at seating process and valve sliding on seat under combustion pressure. The wear is related to valve closing ve- locity, combustion load, misalignment characteristics of valve and seat and material of valve and seat.

关 键 词：内燃机 气门 气门座圈 磨损机制 

分 类 号：TK42[动力工程及工程热物理—动力机械及工程]