运行工况及轴承间隙对主轴承润滑参数的影响  

Effect of operating conditions and bearing clearance on lubrication parameters of main bearing

作　　者：王国强 纪少波[1] 李卫 张珂 岳远航 潘驰 WANG Guoqiang;JI Shaobo;LI Wei;ZHANG Ke;YUE Yuanhang;PAN Chi(School of Energy and Power Engineering,Shandong University,Jinan 250061,China;Weichai Power Co.,Ltd.,Weifang 261061,China)

机构地区：[1]山东大学能源与动力工程学院,山东济南250061 [2]潍柴动力股份有限公司,山东潍坊261061

出　　处：《内燃机与动力装置》2024年第3期37-45,50,共10页Internal Combustion Engine & Powerplant

基　　金：山东省科技型中小企业创新能力提升工程项目(2022TSGC2041);动力机械与工程教育部重点实验室开放课题(202302)。

摘　　要：为了研究不同因素对曲轴-主轴承润滑状态的影响规律,搭建发动机多体动力学模型,系统分析不同转速、润滑油温度及主轴承间隙下,主轴承所受载荷、最小油膜厚度、峰值油膜压力及轴心轨迹等主轴承润滑参数的变化规律。仿真结果表明:主轴承所受载荷及峰值油膜压力均随转速、主轴承间隙增大而增大,随润滑油温度升高而减小;最小油膜厚度随润滑油温度、主轴承间隙增大而减小,随转速变化规律不明显;当主轴承间隙增加时,曲轴的轴心轨迹范围增大,导致发动机的运行可靠性降低。To investigate the influence of different factors on the lubrication status of the crankshaft and main bearing.A multi-body dynamics model is established to study the change trend of main bearing load,minimum oil film thickness,peak oil film pressure and center trajectory of bearing under different engine speed,oil temperature and main bearing clearance.The results show that the main bearing load and peak oil film pressure both increase with the increasing of engine speed and main bearing clearance,and decrease with the increasing of oil temperature.The minimum oil film thickness increases with the oil temperature and main bearing clearance.The change trend of minimum oil film thickness is not clear with the increasing of engine speed.With the increasing main bearing clearance,center trajectory of bearing is increased,which can reduce the reliability of the engine.

关 键 词：多体动力学分析 曲轴-主轴承 润滑参数 数值分析 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]