摘要
在赫兹接触理论的基础上,通过拟静力学方程对高速旋转,承受联合载荷和角偏斜的微涡轮角接触球轴承进行计算,得到不同轴向预紧力、径向载荷及偏转角下的轴承受力及其打滑情况,并基于Hirano打滑准则得到轴承的打滑临界曲线。结果表明:为了防止球打滑,以较高转速运转的角接触球轴承需要较大的轴向预紧力;当不承受径向载荷且轴向预紧力低于100 N时,轴承在20000~70000 r/min转速内均发生打滑,当径向载荷增至2000 N时,轴承在20000~70000 r/min转速内均不发生打滑;随着转速的增加,轴承所受离心力增加,球与外圈间的接触载荷增加,球与内圈间的接触载荷减小,导致轴承在高速下的打滑加剧;随着轴承力矩载荷或轴向预紧力的增大,偏转角增大;存在角偏斜的情况下,随着轴向预紧力的增大,球受力增大,离径向载荷作用线越近的球受力更明显,球Hirano打滑系数增大,轴承越不易打滑。
On the basis of Hertz contact theory,the angular contact ball bearings for micro turbines rotating at high speed under combined load and angular deflection are calculated by quasi-static equations.The bearing forces and their slip conditions are obtained under different axial preloads,radial loads and deflection angles.The critical curve for slippage of the bearings is obtained based on Hirano slip criterion.The results show that in order to prevent ball slippage,the bearings operating at higher rotational speed require larger axial preload;when the radial load is not subjected and the axial preload is less than 100 N,the bearing will slip from 20000 to 70000 r/min;when the radial load is increased to 2000 N,the bearing will not slip from 20000 to 70000 r/min;with the increase of rotational speed,the centrifugal force on the bearings increases,the contact load between ball and outer ring increases,and the contact load between ball and inner ring decreases,resulting in increased slippage of the bearings at high speed;with the increase of bearing torque load or axial preload,the deflection angle increases;in the presence of angular deflection,with the increase of axial preload,the force on ball increases,the force on ball closer to radial load line is more obvious,the Hirano slip coefficient of ball increases,and the bearings are less likely to slip.
作者
王宇
王镇
韩清鹏
朱瑞
吕杭原
WANG Yu;WANG Zhen;HAN Qingpeng;ZHU Rui;LYU Hangyuan(College of Energy and Mechanical Engineering,Shanghai University of Electric Power,Shanghai 201306,China;School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China)
出处
《轴承》
北大核心
2025年第1期61-68,共8页
Bearing
基金
国家重点研发计划资助项目(2021YFB2011100)
国家自然科学基金资助项目(12172210)。
关键词
滚动轴承
角接触球轴承
径向载荷
轴向载荷
接触力
赫兹接触
rolling bearing
angular contact ball bearing
radial load
axial load
contact force
Hertz contact
作者简介
王宇(1998-),硕士研究生,研究方向为滚动轴承动力学分析,E-mail:1978677598@qq.com;通信作者:韩清鹏(1974-),副教授,硕士生导师,E-mail:han1011@163.com。
