Results 11 to 20 of about 255 (213)
A Numerical Analysis of the Nonlinear Dynamics of Shimmed Conical Gas Foil Bearings
Applied Sciences, 2023 Conical gas foil bearings (CGFBs) have the potential to halve the number of necessary bearings in a conventional rotor system supported by gas foil bearings.
Marian Sarrazin, Robert Liebich
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Performance potential of gas foil thrust bearings enhanced with spiral grooves [PDF]
Tribology International, 2019 Abstract The upscaling of turbomachinery using gas foil thrust bearings is limited because of their limited load capacity and the thermal issues linked with very thin film thickness. The improvement potential of spiral grooves manufactured on the top-foil of such bearings is investigated in terms of load capacity and drag torque for a wide range of ...
Eliott Guenat, Jürg Schiffmann
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Design, Fabrication, and Performance of Foil Gas Thrust Bearings for Microturbomachinery Applications [PDF]
Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Manufacturing, Materials and Metallurgy; Microturbines and Small Turbomachinery, 2008 A methodology for the design and construction of simple foil thrust bearings intended for parametric performance testing and low marginal costs is presented. Features drawn from a review of the open literature are discussed as they relate to bearing performance. The design of fixtures and tooling required to fabricate foil thrust bearings is presented,
Brian Dykas +4 more
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Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2016 In the fluid film lubrication of high speed turbomachinery, bearing performance plays a significant role in the dynamics of the rotor-bearing system. In this paper, a novel foil thrust bearing using multi-decked protuberant foils as supporting structure ...
Tianwei LAI +4 more
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EFFECT OF MISALIGNMENT ON THE DURABILITY OF GAS-LUBRICATED FOIL THRUST BEARING [PDF]
JES. Journal of Engineering Sciences, 2016 The present study aims to evaluate the effects of static and dynamic angular misalignments of the runner surface on the performance of a gas-lubricated foil thrust bearing. The responses of the bearing load capacity, viscous power loss, and the stiffness and damping coefficients of the gas film to small angular misalignments are thoroughly analyzed ...
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Numerical analysis of aerodynamic lubricated double-decked protuberant foil thrust bearing
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2019 Double-decked protuberant foil bearing is a type of foil bearing that uses two stacking-up layers of protuberant foils as supporting structure. In preliminary experiments, wear failure of foil thrust bearing occurs occasionally due to excessive axial ...
Yu GUO +5 more
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Preliminary Studies on Gas Foil Thrust Bearings with Stepped Foils
Tribology OnlineStudies on non-contact hydrodynamic foil thrust bearings (FTB) with a diameter of 224 mm were fabricated and tested for operating speeds up to 20,000 rpm. Single layer top foils and stepped / multiple foils with steel and copper foil materials were used in the present study that eliminates the complexity of foil design and manufacturing.
Shivakumar, Supreeth +2 more
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Advanced Engineering Materials, EarlyView.This review comprehensively evaluates extrusion‐based additive manufacturing for advanced ceramics, detailing feedstock options and key process parameters. By critically addressing defect mechanisms like porosity and cracking, the work highlights optimization strategies through machine learning and advanced postprocessing.
Meisam Bakhtiari +4 more
wiley +1 more source
Advances in Sustainable and Wearable Textile Based Soft Robotics
Advanced Functional Materials, EarlyView.This Review examines advances in wearable textile‐based soft robotics, focusing on sustainable materials, integrated sensing, and scalable actuation. It discusses manufacturing and system integration across healthcare, assistive robotics, prosthetics, and human–machine interfaces, and highlights key challenges in circular design, including life‐cycle ...
Zahir Abbas +6 more
wiley +1 more source
Versatile Pneumatic Twisted Coiled Actuators Enabled by Fiber‐Polymer Composite Fabrication
Advanced Functional Materials, EarlyView.This work reports composite Pneumatic Twisted Coiled Actuators with embedded Kevlar fibers that convert pneumatic or hydraulic pressure into powerful linear motion. A novel precise manufacturing technique is used to systematically explore how design variables influence actuator mechanics and dynamics.
William J. Townsend +5 more
wiley +1 more source