支承立轧辊的双列圆锥滚子轴承疲劳寿命计算方法研究  

Fatigue Life Calculation Method of Double-Row Tapered Roller Bearing Supporting Vertical Roller

作　　者：杨泊莘 许浩杰 安琦[1] YANG Boxin;XU Haojie;AN Qi(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;Yangtze Delta Region Institute of Tsinghua University,Jiaxing 314000,Zhejiang,China)

机构地区：[1]华东理工大学机械与动力工程学院,上海200237 [2]浙江清华长三角研究院,浙江嘉兴314000

出　　处：《华东理工大学学报（自然科学版）》2024年第4期610-618,共9页Journal of East China University of Science and Technology

摘　　要：以立轧辊及其支承的双列圆锥滚子轴承为研究对象,通过力学分析,构建了一种针对立轧双列圆锥滚子支承轴承受力进行计算的力学模型。通过对轴承滚子接触受力与局部变形的分析,建立了复合载荷作用下轴承载荷分布与疲劳寿命的计算方法。以一个具体立轧机的立辊支承轴承为算例,深入研究了轴承的轴心位移和滚动体受力变化规律。在此基础上,对轧制过程中钢坯变形与轴承受力进行了耦合计算,研究了若干工艺参数对滚子接触应力和轴承寿命的影响规律。研究发现,轴心轨迹为不规则的椭圆,滚子与内圈挡边的接触力很小,内滚道与滚子的最大接触应力略大于外滚道。随着侧压率、钢坯厚度、钢坯宽度以及立辊半径的增加,滚子的最大接触应力逐渐增大,轴承的疲劳寿命逐渐减小。在主要轧制参数中,侧压率和钢坯厚度的影响更为显著。轴承两列的载荷差值随复合载荷的增大而增大,从而导致了轴承整体寿命的降低。Taking the vertical rolling roller and its double row tapered roller supporting bearing as the research object,a mechanical model for calculating the supporting force of bearing is constructed through mechanical analysis.By analyzing the contact force and local deformation of bearing roller,a calculation method for load distribution and fatigue life of bearing under composite load is established.Taking a specific supporting bearing of the vertical rolling mill as an example,the displacement curves of the bearing axis and the force on the rolling element are systematically discussed.On this basis,coupled calculations are conducted on the deformation of steel slab and the contact force of bearing during vertical rolling process,and the influences of several process parameters on roller stress and bearing life are studied.The research shows that the axis trajectory of the bearing is an irregular ellipse.The contact force between the roller and the inner ring rib of the bearing is very small.The maximum contact stress between the roller and the inner ring is slightly greater than that of roller-outer ring.When the width reduction rate,slab thickness,slab width and vertical roller radius increase,the maximum contact stress of the roller increases,and the fatigue life of the bearing decreases.Among the main rolling parameters,the influence of width reduction rate and slab thickness is more significant.The difference of load value between the two rows increases with the increase of the composite load,which results in the decrease of bearing life.

关 键 词：立轧辊 圆锥滚子轴承 力学分析 疲劳寿命 耦合模型 

分 类 号：TH133.33[机械工程—机械制造及自动化]