Stability analysis of long hydrodynamic journal bearings based on the journal center trajectory

Yu HUANG; Haiyin CAO; Zhuxin TIAN

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Stability analysis of long hydrodynamic journal bearings based on the journal center trajectory

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摘要

In this study,we observe that there are two threshold speeds(stability threshold speed and second threshold speed)for the long journal bearing,which is different for the short bearing.When the rotating speed is below the stability threshold speed,the stability boundary nearly coincides with the clearance circle,and the journal center gradually returns to the equilibrium point after being released at an initial point.If the rotating speed is between the stability threshold speed and the second threshold speed,after being released at an initial point,the journal center converges to a contour containing the equilibrium point.In this situation,for a higher rotating speed,the corresponding contour is also larger.When the rotating speed exceeds the second threshold speed,the journal gradually moves towards the bearing surface after being released at an initial point.

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《摩擦（英文版）》 |2021年第6期|1776-1783|共8页
作者
Yu HUANG; Haiyin CAO; Zhuxin TIAN;
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作者单位

State Key Lab of Digital Manufacturing Equipment and Technology;

School of Mechanical Science and Engineering;

Huazhong University of Science and Technology;

Wuhan 430074;

China;

School of Mechanical Engineering;

Hubei University of Arts and Science;

Xiangyang 441053;

China;

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原文格式 PDF
正文语种 chi
中图分类滑动轴承;
关键词
long journal bearings; stability threshold speed; stability boundary; journal center trajectory;

Stability analysis of long hydrodynamic journal bearings based on the journal center trajectory

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