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内燃动力装置一缸熄火时扭转振动特性,是部分气缸运行下扭转振动问题的最特殊情况,然而,却是最常见和最重要的情况.本文根据可能出现的三种熄火状况进行分析讨论.所谓三种熄火状况,即《第一类型熄火状况》简称“停缸”:当发动机某一气缸运动部件损坏,拆卸活塞连杆机构,采用发动机减缸运行的情况;《第二类型熄火状况》指发动机某一缸由于严重漏气,而使气缸内气体压缩过程建立不起气缸压力的情况,使气缸熄火;《第三类型熄火状况》为发动机某一气缸因供油系统损坏,造成气缸熄火的情况.或者是人为地将一个气缸改为压气机缸的情况.现在分析一缸“熄火”时下述动力装置扭转振动的特性.主机均采用同一型号六缸四冲程中速柴油机.三种熄火状况采用的动力装置如图1所示.它们是:第一种装置形式(简称“装置I”)是柴油机通过高弹性联轴节与推力轴联接的船舶内燃动力装置,当量系统如图1a所示.
The torsional vibration characteristics of one cylinder of an internal combustion power plant are the most special cases of the torsional vibration problem of some cylinders, however, they are the most common and important situation.This paper analyzes and discusses the three kinds of flameout conditions that may appear. Three kinds of flameout conditions, namely, “the first type of flameout condition” is abbreviated as “cylinder deactivation”: when a moving part of a cylinder is damaged, the piston rod mechanism is disassembled and the engine is operated by reducing the cylinder; “Type 2 flameout condition” The engine cylinder due to a serious leak, leaving the cylinder gas compression process can not afford the cylinder pressure, the cylinder flameout; “the third type of flameout condition” for a cylinder of the engine due to oil system damage, causing the cylinder flameout Situation.Or artificially to a cylinder into the case of the compressor.An analysis of a cylinder, “turn off” when the following torsion vibration characteristics of the power plant.Host use the same type of six-cylinder four-stroke medium-speed diesel engine.Three kinds of flameout conditions The power plant used is shown in Figure 1. They are: The first form of plant (referred to as “plant I”) is a diesel engine with a highly elastic coupling and push Ship shaft coupling of the combustion-powered apparatus, equivalent system shown in Figure 1a.