Results 171 to 180 of about 255 (213)
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Journal of Tribology, 2014
A new structural stiffness model for the compliant structure in foil gas bearings is introduced in the first part of this work. The model investigates the possibility that the flat segment between bumps, in bump foil strip, may deflect laterally and separate from the rigid bearing surface, and it also considers the interaction between bumps in the bump
Kaneko Shigehiko
exaly +2 more sources
A new structural stiffness model for the compliant structure in foil gas bearings is introduced in the first part of this work. The model investigates the possibility that the flat segment between bumps, in bump foil strip, may deflect laterally and separate from the rigid bearing surface, and it also considers the interaction between bumps in the bump
Kaneko Shigehiko
exaly +2 more sources
Study on the performance of gas foil thrust bearings with stacked bump foils
Industrial Lubrication and Tribology, 2020Purpose This paper aims to improve the load capacity of gas foil thrust bearing (GFTB) and to introduce and study a novel bearing with stacked bump foils. Design/methodology/approach For the proposed novel GFTB supported by stacked ...
Hongyang Hu, Ming Feng, Tianming Ren
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Study on Structural Stiffness of Foil in Thrust Foil Gas Bearing
The Proceedings of Mechanical Engineering Congress Japan, 2016Yuta Sunami
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Thermal Management Phenomena in Foil Gas Thrust Bearings
Volume 5: Marine; Microturbines and Small Turbomachinery; Oil and Gas Applications; Structures and Dynamics, Parts A and B, 2006Thrust foil gas bearings operate at high speeds on a very thin fluid film which experiences high shear. Shear induced viscous losses result in localized heating which must be managed to prevent thermal distortions and failure. The current work examines the need for thermal management in thrust foil bearings as evidenced by reduced performance in ...
Brian Dykas +3 more
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Preliminary Experimental Characterization of the Gas Film in Foil Thrust Bearings
Part B: Magnetic Storage Tribology; Manufacturing/Metalworking Tribology; Nanotribology; Engineered Surfaces; Biotribology; Emerging Technologies; Special Symposia on Contact Mechanics; Special Symposium on Nanotribology, 2006Foil gas thrust bearings are a critical component enabling oil-free turbomachinery, but because of the strong effect bearing compliance has on the hydrodynamic gas film, current numerical simulation efforts require experimental measurement of gas film quantities for verification.
Brian Dykas +2 more
openaire +1 more source
A preliminary study of the load bearing capacity of a new foil thrust gas bearing
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2010With the rapid development of high-speed, oil-free turbomachinery, more and more attention is concentrated on compliant aerodynamic foil bearings. However, the common corrugated bump foil forming the compliant structure is so complicated that manufacturing it is time-consuming and troublesome.
R G Chen, Q Zhou, Y Liu, Y Hou
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Static Characteristics of Gas Foil Thrust Bearing Based on Gas Rarefaction Model
Volume 7A: Structures and Dynamics, 2015A modified Reynolds equation for bump type gas foil thrust bearing was established with consideration of the gas rarefaction coefficient. Under rarefied gas lubrication, the Knudsen number which was affected by the film thickness and pressure was introduced to the Reynolds equation. The coupled modified Reynolds and lubricating film thickness equations
Jiajia Yan +3 more
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Influence of slip-flow phenomenon on thermohydrodynamic behaviour of gas foil thrust bearings
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2021Gas foil bearings are often used in high-speed turbomachinery such as turboexpanders and turbochargers due to their merits over simple gas-lubricated bearings. The merits of gas foil bearings include their ability to tailor dynamic parameters such as stiffness and damping.
Jitesh Kumar +3 more
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Numerical analysis and optimization of rectangular texture for gas foil thrust bearing
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2020Accurate surface texture design is of great significance to improve the performances of gas bearings. In this article, the finite difference method and Newton’s method were combined to obtain the oil film pressure distribution, and the effect of rectangular groove on the lubrication performance was analyzed by changing representative texture parameters.
Zhenpeng He +4 more
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