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Tribology International, 107
Journal of Tribology, 128
Journal of Engineering for Gas Turbines and Power, 125
Tribology International, 140
Journal of Engineering for Gas Turbines and Power, 140
Tribology International, 103
Industrial Lubrication and Tribology, 69
Journal of Tribology, 115
Journal of Tribology, 123
Journal of Tribology, 109
Industrial Lubrication and Tribology, 67
Tribology International, 38
Industrial Lubrication and Tribology, 72
Tribology Transactions, 43
Journal of Lubrication Technology, 105
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 229
Journal of Sound and Vibration, 501
Cryogenics, 96
Lubricants, 8
Journal of Engineering for Gas Turbines and Power, 129
Journal of Tribology, 124
Advances in Mechanical Engineering, 11
Wear, 265
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 231
The misalignment is generally inevitable in the process of machining and assembly of rotor systems with gas foil bearings, but the exploration on this phenomenon is relatively less. Therefore, the purpose of this paper is to carry out the thermo-elastohydrodynamic analysis of the foil bearing with misalignment, especially the inhomogeneous foil bearing.Design/methodology/approachThe rotor is allowed to misalign in two non-rotating directions. Then the static and dynamic performance of the inhomogeneous foil bearing is studied. The thermal-elastohydrodynamic analysis is realized by combining the Reynolds equation, foil deformation equation and energy equation. The small perturbation method is used to calculate the dynamic coefficients, then the critical whirl ratio is obtained.FindingsThe gas pressure, film thickness and temperature distribution distort when the misalignment appears. The rotor misalignment can improve the loading capacity but rise the gas temperature at the same time. Furthermore, the rotor misalignment can affect the critical whirl ratio which demonstrates that it is necessary to analyze the misalignment before the rotordynamic design.Originality/valueThe value of this paper is the exploration of the thermo-elastohydrodynamic performance of the inhomogeneous foil bearing with misalignment, the analysis procedure and the corresponding results are valuable for the design of turbo system with gas foil bearings.
Industrial Lubrication and Tribology – Emerald Publishing
Published: Sep 9, 2021
Keywords: Static and dynamic performance; Foil bearing; Rotor misalignment; Thermo-elastohydrodynamic analysis
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