Parameter Sensitivity Analysis on Dynamic Coefficients of Partial Arc Annular-Thrust Aerostatic Porous Journal Bearings [PDF]
Applied Sciences, 2021 Aerostatic bearings are widely used in high-precision devices. Partial arc annular-thrust aerostatic porous journal bearings are a prominent type of aerostatic bearings, which carry both radial and axial loads and provide high load-carrying capacity, low
Pyung Hwang, Polina Khan, Seok-Won Kang
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Theoretical and Numerical Investigations on Static Characteristics of Aerostatic Porous Journal Bearings [PDF]
Machines, 2022 To investigate the static characteristics of aerostatic journal bearings with porous bushing, the flow model—in which the compressibility of lubricating gas is considered—is established based on the Reynolds lubrication equation, Darcy equation for ...
Yandong Gu +4 more
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Ceramic matrices applied to aerostatic porous journal bearings: material characterization and bearing modeling Matrizes cerâmicas com aplicação em mancais aerostáticos cerâmicos porosos: caracterização do material e modelagem do mancal [PDF]
Cerâmica, 2010 This paper presents the development of an advanced ceramic material for manufacturing aerostatic porous bearing. The results show that there is homogeneous distribution of the pores in the alumina matrix by using different concentrations of the added ...
Z. C Silveira +3 more
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Study on Static Characteristics of Aerostatic Bearing Based on Porous SiC Ceramic Membranes. [PDF]
Membranes (Basel), 2022 Xiao X +6 more
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Air and atmosphere studies: Enlightenment, phenomenology and ecocriticism
Literature Compass, Volume 19, Issue 1-2, February 2022., 2022 Abstract This essay examines the treatment of air and atmosphere in literary scholarship of the late 17th‐ to mid‐19th‐century periods, from the first, early Enlightenment discovery of the air's chemical structure and the coining of the word ‘atmosphere’, to the dawning of Victorian industrial pollution.
Rowan Rose Boyson
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Aerostatic Journal Bearing based on an Orthotropic Layered Porous Structure [PDF]
, 2023 The present thesis describes the experimental performance determination and numerical modeling of an aerostatic porous bearing made of an orthotropically layered ceramic composite material (CMC). The high temperature resistance, low thermal expansion and high reusability of this material makes it eminently suitable for use in highly stressed fluid-film
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Instability of Aerostatic Journal Bearings with Porous Floating Bush at High Speeds
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C, 2008 Recently, demands of higher rotational speeds and rotational accuracy to aerostatic spindles used in machine tools such as a drilling machine for printed circuit board and a milling machine for manufacturing very small precise parts have been remarkably increasing.
MIYATAKE, Masaaki +3 more
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Static Characteristics of Thrust/Journal Combined Type of Aerostatic Porous Bearings
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C, 2005 Aerostatic bearings have been successfully applied to ultra precision machine tools and precision measuring equipments because they have higher accuracy of motion and lower friction than another types of bearings. Spindles of these precision machines are generally supported by both journal and thrust bearings.
MIYATAKE, Masaaki +4 more
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Lubrication Science, EarlyView.ABSTRACT Porous gas bearings (PGBs) enable high‐speed, oil‐free operation in modern rotating machinery. This study develops a coupled thermo‐hydrodynamic (THD) model for a cylindrical porous gas bearing lubricated with four working fluids—air, R‐134a, helium and hydrogen.
S. Bechiri, B. Bouchehit, B. Bou‐Saïd
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Journal of Applied Mathematics, Volume 2024, Issue 1, 2024.The streamline upwind Petrov‐Galerkin (SUPG) finite element method was used in this study to investigate the thermal and surface roughness effects on an inclined slider bearing with an unsteady fluid film. One‐dimensional transverse and longitudinal surface roughness models were considered with the supposition that roughness is stochastic and has a ...
Girma Desu Tessema +3 more
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