Imperial College London

Dr Tom Reddyhoff

Faculty of EngineeringDepartment of Mechanical Engineering

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 3840t.reddyhoff Website

 
 
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Location

 

670City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Wang:2016:1/012020,
author = {Wang, P and Zhang, J and Spikes, HA and Reddyhoff, T and Holmes, AS},
doi = {1/012020},
publisher = {IOP Publishing},
title = {Development of hydrodynamic micro-bearings},
url = {http://dx.doi.org/10.1088/1742-6596/773/1/012020},
year = {2016}
}

RIS format (EndNote, RefMan)

TY  - CPAPER
AB - This paper describes the modelling and testing of mm-scale hydrodynamic bearings which are being developed to improve the efficiency of a cm-scale turbine energy harvester, whose efficiency was previously limited by poorly lubricated commercial jewel-bearings. The bearings were fabricated using DRIE and their performance was assessed using a custom built MEMS tribometer. Results demonstrate that acceptably low friction is achieved when low viscosity liquid lubricants are used in combination with an appropriate choice of friction modifier additive. Further reduction in friction is demonstrated when the step height of bearing is adjusted in accordance with hydrodynamic theory. In parallel with the experiments, hydrodynamic lubricant modelling has been carried out to predict and further optimize film thickness and friction performance. Modelling results are presented and validated against experimental friction data.
AU - Wang,P
AU - Zhang,J
AU - Spikes,HA
AU - Reddyhoff,T
AU - Holmes,AS
DO - 1/012020
PB - IOP Publishing
PY - 2016///
SN - 1742-6588
TI - Development of hydrodynamic micro-bearings
UR - http://dx.doi.org/10.1088/1742-6596/773/1/012020
UR - http://hdl.handle.net/10044/1/44594
ER -