Analysis on static and dynamic performances of ultra-thin multi-lobe gas lubrication bearings

DOI

10.2991/iceep-18.2018.100How to use a DOI?

Keywords

rarefaction effect; modified Reynolds equation; PDE; static and dynamic performances

Abstract

The coupling effects of gas-rarefaction are taken into consideration to investigate the static and dynamic performance of the three lobe gas bearing with ultra-thin gas lubrication. The influence of gas-rarefaction on static and dynamic performances of three-lobe bearing with different models are studied. The Reynolds equation is modified by the first order slip model,second order slip model and Boltzmann model, and corresponding journal perturbation equation are solved by MATLAB Partial Differential Equation(PDE) Toolbox. Effect of eccentricity, bearing number, length to diameter ratio and disturbance frequency on the flow characteristics, including gas film pressure distribution, load carrying capacity and eight linear dynamic coefficients, are discussed numerically. The results show that gas-rarefaction are of great significance in not only pressure distribution and load capacity but also bearing dynamic performance. The second-order and Boltzmann model are more consistent and is smaller than the result of first-order model.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Datao Wu
AU  - Lihua Yang
PY  - 2018/09
DA  - 2018/09
TI  - Analysis on static and dynamic performances of ultra-thin multi-lobe gas lubrication bearings
BT  - Proceedings of the 2018 7th International Conference on Energy and Environmental Protection (ICEEP 2018)
PB  - Atlantis Press
SP  - 567
EP  - 573
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceep-18.2018.100
DO  - 10.2991/iceep-18.2018.100
ID  - Wu2018/09
ER  -