Effect of support stiffness and damping on stability characteristics of herringbone-grooved aerodynamic journal bearings mounted on viscoelastic supports
Effect of support stiffness and damping on stability characteristics of herringbone-grooved aerodynamic journal bearings mounted on viscoelastic supports
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DOI：
10.1016/j.triboint.2016.01.019
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发表时间：
2016-08-01
影响因子：
6.2
通讯作者：
Tomioka, Jun
中科院分区：
文献类型：
--
作者：
Miyanaga, Norifumi;Tomioka, Jun
安装在粘弹性支承上的径向轴承经常被用来提高稳定性。然而，还没有建立适当的支撑条件，特别是人字形沟槽空气动压径向轴承。本研究旨在了解支承刚度和阻尼力对轴承稳定性特性的影响。为此，对各种粘弹性支承条件进行了线性摄动分析和非线性暂态分析。研究表明，产生最高失稳门槛速度的槽型会随着粘弹性支承条件的变化而变化。研究还表明，用粘弹性支承稳定轴承是可能的。然而，低阻尼支承条件下的门槛速度降低，而刚性支承条件下的门槛速度降低。(C)2016爱思唯尔有限公司。保留所有权利。
Journal bearings mounted on viscoelastic supports are often used to improve the stability. However, proper support conditions have not been established especially for herringbone-grooved aerodynamic journal bearings. This study aims to make clear the effect of support stiffness and damping on the stability characteristics of the bearings. For that purpose, the linear perturbation analysis and the nonlinear transient analysis are performed for various viscoelastic support conditions. This investigation reveals that the groove configuration that gives the highest threshold speed of whirl instability changes with the viscoelastic support conditions. This investigation also reveals that it is possible to stabilize the bearings by viscoelastic supports. However, the threshold speed for lower damping support conditions decreases rather than that for rigid support condition. (C) 2016 Elsevier Ltd. All rights reserved.