柴油机活塞敲击振动影响因素研究  

The Influencing Factors Research of Piston Slap Vibration from Diesel

作　　者：李晓磊[1,2] 刘建敏[1] 乔新勇[1] 李华莹[1] 吴刚 

机构地区：[1]装甲兵工程学院机械工程系 [2]解放军77160部队 [3]解放军65053部队

出　　处：《机械设计与制造》2013年第5期197-200,共4页Machinery Design & Manufacture

基　　金：武器装备预研基金项目(9140A27020206JB3502);装备预先研究项目(40402020101)

摘　　要：以某12150型柴油机为研究对象,分析了活塞的受力情况,建立了活塞敲击的动力学模型;进行了柴油机台架试验,并采集了倒拖工况下的缸内压力及机体振动信号;通过分析机体振动信号的时频特性及柴油机工作时序验证了敲击模型的准确性;基于此模型,分析了活塞在气缸内的运动规律,并分别研究了活塞装配间隙、曲轴转速对活塞敲击时刻及敲击动能的影响,揭示了活塞敲击激励与活塞装配间隙以及转速的本质联系,为利用振动信号监测缸套磨损状况提供了理论基础。Dynamic model of piston slap was built by analysis of piston stress according to some 12150 diesel;cylinder pressure and body vibration signal under driving operating mode were taken by diesel bench test;the accuracy of this model was proved by analysis on Time-Frequency character of body vibration signal and diesel operating sequence;the moving regular pattern of piston was analyzed on this model,and the influence of fit-up gap and speed of crankshaft to piston slap and kinetic energy was researched,which disclosured the constitutive relations between piston slap motivation and fit-up gap and speed of crankshaft,it supplied theoretical basis for diagnosing wear of liner with vibration signal.

关 键 词：柴油机 活塞敲击 振动 装配间隙 

分 类 号：TH16[机械工程—机械制造及自动化] TK42[动力工程及工程热物理—动力机械及工程]