Accounting for lubricant shear thinning in the design of short journal bearings
作者:
A. Rastogi,
R. K. Gupta,
期刊:
Journal of Rheology
(AIP Available online 1991)
卷期:
Volume 35,
issue 4
页码: 589-603
ISSN:0148-6055
年代: 1991
DOI:10.1122/1.550182
出版商: The Society of Rheology
关键词: Journal bearings;Non‐Newtonian lubricants;Shear thinning;High shear rate viscosity;Load bearing capacity;Dynamic loading;JOURNAL BEARINGS;DESIGN;LUBRICATION;VISCOSITY;LUBRICATING OILS;SHEAR
数据来源: AIP
摘要:
Equations are derived for analyzing the flow of inelastic, non‐Newtonian lubricants in short journal bearings. A realistic bearing geometry is used along with the power‐law fluid model to study the influence of lubricant shear thinning on the load‐bearing capacity under isothermal conditions. The results are useful for designing journal bearings to achieve desired values of the friction coefficient or the minimum oil film thickness for steady as well as time‐varying loads. These results show that the idea of using the viscosity corresponding to the shear rate in the bearing for evaluating engine oil flow characteristics is a reasonable one.
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