Actively lubricated hybrid journal bearings based on magnetic fluids for high-precision spindles of machine tools

The research work reported in this article is focused on the use of magnetic fluids as active lubricant for improving the performance of hybrid journal bearings, with application to high-precision machine tools. Prototype design was optimized following numerical computation of Reynolds equation and...

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Bibliographic Details
Published in:Journal of intelligent material systems and structures 2019-09, Vol.30 (15), p.2257-2271
Main Authors: Urreta, Harkaitz, Aguirre, Gorka, Kuzhir, Pavel, Lopez de Lacalle, Luis Norberto
Format: Article
Language:English
Subjects:
Engineering Sciences
Mechanical engineering
Mechanics
Vibrations
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Summary:The research work reported in this article is focused on the use of magnetic fluids as active lubricant for improving the performance of hybrid journal bearings, with application to high-precision machine tools. Prototype design was optimized following numerical computation of Reynolds equation and computational fluid dynamics calculations, in both cases with Herschel–Bulkley model for the magnetorheological fluid. This fluid (LORD Corp. MRF 122-2ED) was experimentally characterized in detail. The improvement of the hydrodynamic effect in journal bearings was demonstrated with 50% higher load capacity and stiffness, mainly at half of shaft eccentricity 0.4 
ISSN:1045-389X
1530-8138
DOI:10.1177/1045389X19862358