大型三排滚柱式转盘轴承的有限元计算分析  

FINITE ELEMENT CALCULATION ANALYSIS OF A LARGE THREE-ROW ROLLER SLEWING BEARING

作　　者：黄龙艺 傅航 王钰 王华[1] 嵇栩 HUANG LongYi;FU Hang;WANG Yu;WANG Hua;JI Xu(School of Mechanical&Power Engineering,Nanjing Tech University,Nanjing 211816,China;STE Transmission Equipment Co.,Ltd.,Changshu 215500,China)

机构地区：[1]南京工业大学机械与工程学院,南京211816 [2]索特传动设备有限公司,常熟215500

出　　处：《机械强度》2022年第3期627-634,共8页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51875273);苏州市科技计划项目(SGC2020064)资助。

摘　　要：为提高三排滚柱式转盘轴承载荷分布的有限元计算效率,基于该装配体的结构特点,提出一种采用壳单元和非线性弹簧单元相结合的等效建模方法。利用弹簧单元替代滚子的载荷变形行为,并采用壳单元模拟滚子-滚道的接触面。该建模方法减小了非线性接触的计算量,以较低的计算规模有效地获取轴承的载荷分布。并通过静加载实验验证了有限元计算模型的有效性。根据有限元计算分析提供的最大载荷,对滚子-滚道进行接触分析,研究了不同间隙下滚子-滚道接触的应力分布。结果表明,随着间隙增大,滚子-滚道接触的边缘区域应力值增大,从而导致轴承疲劳寿命减小。To raise the efficiency of finite element calculation of load distribution in large three-row roller slewing bearing, an equivalent modeling method using the combination of shell element and nonlinear spring element was proposed on the basis of the structural features of the assembly. The spring element was used to replace the load and deformation behavior of roller, and the shell element was used to simulate the contact area between the roller and raceway contact. The computational scale of the nonlinear contacts was reduced with this modeling approach, and the load distribution of bearing can be obtained efficiently with lower computational scale. The effectiveness of the finite element calculation model was validated with the static loading experiment. The roller-raceway contact analysis was conducted on the basis of the maximum contact load from the finite element calculation analysis. The stress distribution between the roller and raceway contact under different clearances was studied. The results show that the stress in the edge area of the roller-raceway contact increases with the increase of clearance, thus leading to the decreases of fatigue life.

关 键 词：转盘轴承 载荷分布 间隙 疲劳寿命 非线性弹簧 

分 类 号：TH133.33[机械工程—机械制造及自动化] TH122