主轴承径向轴颈型线对润滑状态的影响  

Influence of Radial Journal Profile of Main Bearing on Lubrication State

作　　者：李春建 赵俊生[1] 朱桂香 李秀春 张国栋 Li Chunjian;Zhao Junsheng;Zhu Guixiang;Li Xiuchun;Zhang Guodong(College of Mechanical Engineering,North University of China,Taiyuan 030051,China;State Key Laboratory of Engine Reliability,Weichai Power Company Limited,Weifang 261061,China)

机构地区：[1]中北大学机械工程学院,山西太原030051 [2]潍柴动力股份有限公司内燃机可靠性国家重点实验室,山东潍坊261061

出　　处：《机械传动》2021年第8期45-50,共6页Journal of Mechanical Transmission

基　　金：内燃机可靠性国家重点实验室开放基金资助项目(SKLER-201903)。

摘　　要：以某型柴油机主轴承为研究对象,计入主轴承表面粗糙度和弹性变形等因素,建立主轴承润滑状态的分析模型,分析了主轴承径向轴颈型线对润滑状态的影响。结果表明,与不考虑径向轴颈型线的计算结果相比,计入径向轴颈型线时,主轴承的最小油膜厚度增加了25.95%,最大油膜压力减小了17.69%,平均摩擦损失减小了6.14%,主轴颈倾斜现象有所改善。随着轴颈表面粗糙度的增加,主轴承的最小油膜厚度增加,最大油膜压力几乎不变,平均摩擦损失增加。Taking the main bearing of a diesel engine as the study object,the lubrication state analysis model of the main bearing is established by taking the roughness and elastic deformation of the main bearing sur⁃face into account,and the influence of the radial profile of the main bearing on the lubrication state is analyzed.The results show that,compared with the calculated results without considering the radial journal profile,when the influence of the radial journal profile is taken into account,the minimum oil film thickness of the main bear⁃ing increases by 25.95%,the maximum oil film pressure decreases by 17.69%,the mean friction power loss de⁃creases by 6.14%and the inclination of the spindle neck is improved.With the increase of journal roughness,the minimum oil film thickness increases,the maximum oil film pressure almost invariably,and the mean fric⁃tion power loss increases.

关 键 词：柴油机 主轴承 径向 轴颈型线 润滑状态 

分 类 号：TK423[动力工程及工程热物理—动力机械及工程]