Analysis on static and dynamic performances of ultra-thin multi-lobe gas lubrication bearings
- 10.2991/iceep-18.2018.100How to use a DOI?
- rarefaction effect; modified Reynolds equation; PDE; static and dynamic performances
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.
- © 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/).
Cite this article
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 -