Exploiting air cushion effects to optimise a superhydrophobic/hydrophilic patterned liquid ring sealed air bearing
File(s)TRIBINT-D-19-01734_ACCEPTED.pdf (1.98 MB)
Accepted version
Author(s)
Wen, Jun
Reddyhoff, Tom
Hu, Songtao
Puhan, Debashis
Dini, Daniele
Type
Journal Article
Abstract
A thrust bearing consisting of an air cushion formed within a liquid ring has been developed, which takes advantage of the Laplace pressure induced by the liquid/air surface tension. As forces induced by Laplace pressure and surface tension scales down much more slowly than gravity and inertial forces, such a bearing has great potential when scaled down to the micro-scale. The liquid ring between the rotor and the stator of the bearing is anchored there by alternating hydrophilic and superhydrophobic patterns. An important discovery is that the performance of this bearing is greatly enhanced by the sealed cushion of air within the ring. This air cushion and thin liquid ring arrangement mean that the solid/solid contact of the bearing is replaced by solid/air and solid/liquid contact which significantly reduces the friction and wear. The factors which affects the performance of the bearing have been studied both experimentally and numerically providing results that can be used to optimise the design of this new type of bearing.
Date Issued
2020-04-01
Date Acceptance
2019-12-17
Citation
Tribology International, 2020, 144
ISSN
0301-679X
Publisher
Elsevier BV
Journal / Book Title
Tribology International
Volume
144
Copyright Statement
© 2019 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Grant Number
EP/N025954/1
Subjects
Science & Technology
Technology
Engineering, Mechanical
Engineering
Superhydrophobic/hydrophilic patterns
Surface tension
Air cushion
Thrust bearing
CAPILLARY
MICRO
BRIDGE
0910 Manufacturing Engineering
0913 Mechanical Engineering
Mechanical Engineering & Transports
Publication Status
Published
Article Number
ARTN 106129
Date Publish Online
2019-12-20