王树青,吴国栋,郭金宝,刘瑞
摘要：内燃机活塞环的密封主要影响漏气量和机油消耗量,这种封闭效应是通过作用在环的上部和背部的气体力而获得的。垂直敲击振荡产生的惯性力和活塞二阶运动的剪切力也对环的封闭效应产生影响。活塞和环的动力学模拟解决了该非线性问题,并且对活塞二阶运动、轴向环运动和第二环岸压力的相互影响进行了预测。本文通过建立某六缸柴油机在几种运行工况和活塞环尺寸方案下的气缸体动力学模型,介绍了预测机油耗的模拟方法,研究了边界条件和参数调整对活塞环运动和气体渗透的影响。
关键词： 机油耗;活塞环;活塞动力学;窜气量
Abstract: The sealing effect of piston
rings in reciprocating engines has a major impact on blow-by gas and lube oil
consumption.The sealing is achieved by the gas forces acting on the top and
back side of the rings.Inertia forces arising from the oscillating vertical
stroke and shear forces due to the secondary piston movement influence this
sealing effect by a reduction in contact pressure.Numerical simulation of the
piston and ring dynamics solves this non-linear problem and predicts the
interaction between piston secondary motion,axial ring motion,and 2nd land
pressure.This paper describes the modeling of the cylinder kit dynamics of a
six-cylinder diesel engine for several operating conditions and ring
modifications.A simulation method is described which predicts lube oil
consumption.The influence of boundary conditions and adjustment parameters on
piston ring motion and gas penetration was investigated.
Keywords: Oil Consumption;Piston
Ring;Piston Dynamics;Blow-by Gas
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