Results 121 to 130 of about 169 (151)

Hybrid Air Foil Thrust Bearings Design and Performance Measurement

Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, 2022
Abstract Air foil bearings (AFBs) are widely used in high speed and low duty turbomachinery such as fuel cell air compressors, turbo blowers and micro gas turbines due to its high-speed operation, low power loss and good temperature adaptability.
Fangcheng Xu, Shuoxian Qiu, Jianhua Chu
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Performance of novel air foil thrust bearings with taper-groove on surface of top foil

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2020
To improve the load capacity of air foil thrust bearing, the micro taper-grooves on the surface of top foil was introduced and studied. A modified Reynolds equation considering the gas rarefaction effect was established, in which the Knudsen number was affected by the film thickness and pressure.
Hongyang Hu, Ming Feng
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Thermal Optimization of Air Foil Thrust Bearings Using Different Foil Materials

Volume 7B: Structures and Dynamics, 2019
Abstract Air foil bearings are used in turbomachinery applications with high speeds and in oil-free environments. Their numerical analysis has to account for the multiphysicality of the problem. This work features a detailed thermo-elasto-hydrodynamic model of an air foil thrust bearing with bump-type foil-structure. The bearing geometry
Markus Rieken, Marcel Mahner, Bernhard Schweizer   +2 more
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Design and Performance Prediction of Hybrid Air Foil Thrust Bearings

Journal of Engineering for Gas Turbines and Power, 2010
Air foil bearings (AFBs) have been recognized as the most promising for oil-free turbomachinery. However, the applications of AFBs to the relatively large turbomachinery have many technical challenges due to limited load capacity and wear during start/stops.
Donghyun Lee, Daejong Kim
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Influence of wedge shape on the performance of air foil thrust bearings

Industrial Lubrication and Tribology, 2019
Purpose The purpose of this paper is to investigate the effect of different wedge shapes on the performance of air foil thrust bearing (AFTB). Design/methodology/approach During the study, a bump foil stiffness model considering slip deformation and a two-dimensional sheet top foil model is established, and the Reynolds equation and film thickness ...
Hongyang Hu, Ming Feng
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Theoretical Study of Top Foil Sagging Effect on the Performance of Air Thrust Foil Bearing

Volume 7B: Structures and Dynamics, 2016
Air thrust foil bearings are used in small turbomachinery to support axial load. Typically, thrust bearings are designed with certain amount of taper from the leading edge until flat land area with uniform clearance. Therefore, the bearing performance is affected by many factors such as taper ratio, taper height, configuration of structural support ...
Fangcheng Xu, Daejong Kim, Behzad Zamanian Yazdi   +2 more
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Experimental Studies on Air Foil Thrust Bearing Load Capabilities Considering the Effect of Foil Configuration

Applied Mechanics and Materials, 2015
Abstract. Foil bearings are self-acting hydrodynamics bearings used to support lightly loaded high speed rotating machinery. The advantages that they offer to process fluid lubricated machines usingworking fluid as a lubricant (ambient air) physically non-contacting high speed operation.
RN Ravikumar, K.J. Rathanraj, V. Arun Kumar   +2 more
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Integrated Hybrid Air Foil-Magnetic Thrust Bearing (i-HFMTB) Part II: Possibility of Rigid Mode Control for 250HP Air Compressor System

Volume 11B: Structures and Dynamics — Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, 2023
Abstract This study aims to verify the effectiveness of the 250 HP class compressor system to which the integrated hybrid air foil magnetic thrust bearing (i-HFMTB) proposed in part I is applied, and the vibration and instability problems of air foil journal bearing (AFJB) occurring in the rigid mode are controlled by i-HFMTB.
Yongbok Lee, Yunseok Ha, Jungwan Kim, Keonwoo Jeong   +3 more
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Rigid Mode Vibration Control for 250 HP Air Compressor System With Integrated Hybrid Air-Foil Magnetic Thrust Bearing (i-HFMTB)

Journal of Engineering for Gas Turbines and Power, 2023
Abstract This study aims to verify the effectiveness of the 250 HP class compressor system to which the integrated hybrid air-foil magnetic thrust bearing (i-HFMTB) proposed in (Ha et al., 2023, “Integrated Hybrid Air Foil-Magnetic Thrust Bearing (i-HFMTB) Part I: Preliminary Experimental Test for Rotordynamic Parameter Identification ...
Yunseok Ha, Jungwan Kim, Keonwoo Jeong, Yongbok Lee   +3 more
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2-FSI Analysis of an Air Foil Thrust Bearing of Air Compressor for a Hydrogen Electric Car

Transactions of the Korean Society for Noise and Vibration Engineering, 2019
A hydrogen-electric car is a fuel-cell vehicle that reacts hydrogen fuel with oxygen in the air to generate electricity to drive the traction motor. An air compressor is a device that compresses air and supplies it to the fuel cell stack. These generally use two types of airfoil bearings: The first is journal bearing, the second a thrust bearing.
Hyun Jang Shin, Gun Woong Park
openaire   +1 more source