Results 1 to 10 of about 134,375 (177)

Elastic Deformation Effects on Self-Lubricating Journal Bearings Using Pseudo-Plastic Lubricants

open access: yesTribology Online, 2021
In this study, we have analyzed the effect of elastic deformations on the static characteristics of finite self-lubricating journal bearings. This analysis takes into account the rheological lubricant behavior which obeys to Rabinowitsch law.
Maamar Malki   +4 more
doaj   +1 more source

Porous Gas Journal Bearings: An Exact Solution Revisited and Force Coefficients for Stable Rotordynamic Performance

open access: yesApplied Sciences, 2021
Having come of age, gas film bearings enable high-speed oil-free (micro) rotating machinery with gains in efficiency and reliability, longer maintenance intervals, and a reduction in contaminants released to the atmosphere.
Luis San Andrés   +2 more
doaj   +1 more source

Parameter Sensitivity Analysis on Dynamic Coefficients of Partial Arc Annular-Thrust Aerostatic Porous Journal Bearings

open access: yesApplied 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
doaj   +1 more source

OPERATING CHARACTERISTICS OF POROUS FLOATING – RING JOURNAL BEARINGS OPERATING WITH AN IMPROVED BOUNDARY CONDITIONS

open access: yesJournal of Engineering, 2007
The static characteristics of porous floating ring journal bearing under hydrodynamic lubrication condition when operating with an improved boundary conditions are theoretically analyzed.
Basim A. Abass   +2 more
doaj   +3 more sources

Theoretical and Numerical Investigations on Static Characteristics of Aerostatic Porous Journal Bearings

open access: yesMachines, 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
doaj   +1 more source

EFFECT OF STARVATION ON THERMOELASTOHYDRODYNAMIC LUBRICATION OF ROLLING / SLIDING CONTACT

open access: yesJournal of Engineering, 2006
A complete numerical solution of thermal compressible elastohydrodynamic lubrication of rolling / sliding contact was achieved to determine the effect of inlet boundary condition on the film shape, film pressure, and film temperature in an ...
Basim A. Abbas, Somer M. Nacy
doaj   +1 more source

Experimental study on the lubrication characteristics of porous circular journal bearing under shaft unsteady condition (Examination into the whirling behavior of shaft at pivot supported condition by measuring the time history waveform of shaft with parameter of diametral clearance changes)

open access: yesNihon Kikai Gakkai ronbunshu, 2015
This report is described the study on the lubrication characteristics of porous circular journal bearing made with oil impregnate sintered materials as a DC spindle motor's bearing system.
Shigeru OHTSUKA   +3 more
doaj   +1 more source

Hydrodynamic lubrication of porous journal bearings with a grease.

open access: yesTRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C, 1985
Porous materials find a wide range of applications as bearing metals because of their self-lubricating action. On the other hand, grease its widely used as a lubricant for porous metal bearings because of its simplicity of application. Unfortunately, since the governing law for flows of grease in porous matrices, that is Equivalent to Darcy's law for ...
Sanae WADA, Yoshiyuki KAWAKAMI
openaire   +2 more sources

Prediction of the lifespan of cement at a specific depth based on the coupling of geomechanical and geochemical processes for CO2 storage [PDF]

open access: yes, 2019
The injection of carbon dioxide (CO2) captured from combustion-based processes into underground formations is one of a number of plausible methods to reduce its release into the atmosphere and consequential greenhouse gas warming.
Bagheri, Mohammadreza   +2 more
core   +1 more source

Porous Hydrodynamic Journal Bearing Analysis Using Micropolar Fluid in Steady-State Condition

open access: yesTribology Online, 2019
The objective of the present work is to study theoretically, the steady-state performance of finite hydrodynamic porous journal bearings under micropolar lubrication. The fluid pressure in porous matrix follows Darcy’s equation.
Ujjal Baidya, Sanjoy Das, Santanu Das
doaj   +1 more source

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