船用柴油机十字头滑块摩擦动力学影响因素分析  

Analysis of Factors Affecting Tribo-Dynamics of Guide Shoe of Marine Diesel Engine

作　　者：李瑞 孟祥慧[1] LI Rui;MENG Xianghui(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《上海交通大学学报》2020年第10期1035-1044,共10页Journal of Shanghai Jiaotong University

基　　金：高技术船舶科研计划(CDGC01-KT0305);国家自然科学基金(51875344)资助项目。

摘　　要：针对船用低速柴油机的十字头滑块-导板摩擦副,基于所建立的摩擦动力学模型和数值求解方法,分析滑块-导板配合间隙、润滑面积、滑块型线、曲轴偏置和十字头销偏置对十字头滑块摩擦动力学特性的影响.研究结果表明:增大滑块-导板的间隙可以有效减小摩擦损失,但同时也会显著增加滑块的最大敲击能,从而加剧发动机的振动和噪声.曲轴向主推力侧偏置可以降低滑块的摩擦损失和发火上止点后的侧向力,同时最大敲击能也有所降低.十字头销向主推力侧偏置则使滑块的摩擦损失增大,发火上止点后的侧向力也有所上升.Based on the tribo-dynamics model established and numerical solution method for the guide shoe-guide friction pair in low-speed marine diesel engines,the effects of guide shoe-guide clearance,lubricating area,guide shoe profile,crankshaft offset,and crosshead pin offset on the tribo-dynamics of guide shoe are analyzed.The results show that increasing the clearance between guide shoe and guide plate can reduce the loss of friction.However,it can significantly increase the maximum slap energy of guide shoe,which exacerbates the engine vibration and noise.Offsetting the crankshaft axis towards the main thrust side reduces the side force after top dead center and the friction loss of guide shoe.The maximum slap energy in a working cycle can also be reduced.However,offsetting the crosshead pin to the main thrust side increases side force after top dead center and the friction loss of guide shoe.

关 键 词：船用柴油机 十字头滑块 混合润滑 二阶运动 摩擦动力学 

分 类 号：TK421.9[动力工程及工程热物理—动力机械及工程]