Thermal effect on the minimum film thickness and stability for a journal floating ring bearing

被引：0
|
作者：
Yang S. [1 ]
Guo H. [1 ]
Zhang Z. [1 ]
机构：
[1] School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou
来源：
Guo, Hong | 1600年 / Chinese Vibration Engineering Society卷 / 39期
关键词：
Journal floating ring bearing; Minimum fluid film thickness; Thermal effect; Threshold speed;
D O I：
10.13465/j.cnki.jvs.2020.18.029
中图分类号：
学科分类号：
摘要：
The finite element method and the finite difference method were combinedly used to solve the Reynolds equations, energy equations and temperature-viscosity equations for a journal floating ring bearing. The inner and outer fluid film pressure distribution, temperature distribution and viscosity distribution were calculated and the pressure was integrated to calculate the bearing stiffness and damping coefficients. The united dynamic equations were established for the shaft and floating ring,and the thermal instability criteria was derived for a single-mass rigid symmetric rotor system using energy equations and Routh-Hurwitz method. The results show that there are several temperature peaks in the inner and outer film pockets, and both ends temperature are higher than the pocket center temperature. The inner and outer minimum fluid film thickness and threshold speed fall rapidly while the inlet temperature is increasing.The lubricant temperature rise is an important factor causing the floating ring bearing fluid film to rupture and be instable, so the lubricant thermal effect should be considered in the bearing performance analysis. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：215 / 222
页数：7
相关论文
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