TY - JOUR
T1 - Performance characteristics of gas-lubricated bump-type foil thrust bearing
AU - Gad, Abdelrasoul M.
AU - Kaneko, Shigehiko
N1 - Funding Information:
The study is a part of a running project entitled “Gas Foil Thrust Bearing for Oil-Free Micro Turbomachinery Applications” which is hosted by the Department of Mechanical Engineering at The University of Tokyo and supported by both The University of Tokyo and The JSPS. The authors would like to thank the JSPS for the kind support of this activity.
Funding Information:
This work was funded by the Japan Society for the Promotion of Science (JSPS), Grant No (24.02361).
Publisher Copyright:
© IMechE 2014 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015/6/3
Y1 - 2015/6/3
N2 - In the present study, the static and dynamic characteristics of Generation II bump-type foil thrust bearings are investigated. For the static characteristics, a 2D compressible Reynolds equation containing effects of centrifugal forces is derived to model the fluid flow in the thin gas film. The compliance of the bearing is calculated using analytical structural stiffness model. The fluid flow equation is coupled to the structural stiffness model and the coupled fluid-structure interaction problem is solved iteratively to obtain the steady-state characteristics of the bearing. For the dynamic characteristics, small perturbations method is used to obtain the linearized equations for the pressure components of dynamic force coefficients. The effects of rotation speed, ramp height, nominal film thickness, friction coefficients at bump foil interfaces, and bump foil stiffness on the static and dynamic characteristics of Generation II foil thrust bearings are thoroughly analyzed.
AB - In the present study, the static and dynamic characteristics of Generation II bump-type foil thrust bearings are investigated. For the static characteristics, a 2D compressible Reynolds equation containing effects of centrifugal forces is derived to model the fluid flow in the thin gas film. The compliance of the bearing is calculated using analytical structural stiffness model. The fluid flow equation is coupled to the structural stiffness model and the coupled fluid-structure interaction problem is solved iteratively to obtain the steady-state characteristics of the bearing. For the dynamic characteristics, small perturbations method is used to obtain the linearized equations for the pressure components of dynamic force coefficients. The effects of rotation speed, ramp height, nominal film thickness, friction coefficients at bump foil interfaces, and bump foil stiffness on the static and dynamic characteristics of Generation II foil thrust bearings are thoroughly analyzed.
KW - Foil thrust bearing
KW - centrifugal force effect
KW - elastohydrodynamic lubrication
KW - generation II
KW - static and dynamic characteristics
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U2 - 10.1177/1350650114564709
DO - 10.1177/1350650114564709
M3 - Article
AN - SCOPUS:84930405826
VL - 229
SP - 746
EP - 762
JO - Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
JF - Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
SN - 1350-6501
IS - 6
ER -