Static and Dynamic Characteristics of Rolling-Pad Journal Bearings in Super-Laminar Flow RegimeSource: Journal of Tribology:;1988:;volume( 110 ):;issue: 001::page 73DOI: 10.1115/1.3261578Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Static and dynamic characteristics of load-on-type rolling-pad journal bearings with six pads have been studied theoretically and experimentally by considering the effects of both turbulence and viscous heat generation in the oil film. By concurrently solving a turbulent lubrication equation and an adiabatic energy equation, pressure and temperature distributions, load capacity, and friction force are obtained. Moreover, the linearlized spring and damping coefficients of oil film are calculated under the assumption of small displacements of the journal center. It is found that the load capacity and the friction force considerably increase due to turbulence, and the effects of heat generated under turbulent conditions are more pronounced than those under laminar conditions. Also clarified are that bearing characteristics are improved by preloading the lower-side two pads located before and after the lowest pad, and that the curvature radius of the pad insignificantly affects the characteristics. The experimental results on static characteristics agree well with the theoretical results.
keyword(s): Flow (Dynamics) , Journal bearings , Turbulence , Stress , Friction , Force , Heat , Equations , Springs , Temperature distribution , Pressure , Lubrication , Bearings AND Damping ,
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contributor author | Makoto Mikami | |
contributor author | Hiromu Hashimoto | |
contributor author | Mikio Kumagai | |
contributor author | Shuetsu Uno | |
date accessioned | 2017-05-08T23:28:27Z | |
date available | 2017-05-08T23:28:27Z | |
date copyright | January, 1988 | |
date issued | 1988 | |
identifier issn | 0742-4787 | |
identifier other | JOTRE9-28468#73_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/104592 | |
description abstract | Static and dynamic characteristics of load-on-type rolling-pad journal bearings with six pads have been studied theoretically and experimentally by considering the effects of both turbulence and viscous heat generation in the oil film. By concurrently solving a turbulent lubrication equation and an adiabatic energy equation, pressure and temperature distributions, load capacity, and friction force are obtained. Moreover, the linearlized spring and damping coefficients of oil film are calculated under the assumption of small displacements of the journal center. It is found that the load capacity and the friction force considerably increase due to turbulence, and the effects of heat generated under turbulent conditions are more pronounced than those under laminar conditions. Also clarified are that bearing characteristics are improved by preloading the lower-side two pads located before and after the lowest pad, and that the curvature radius of the pad insignificantly affects the characteristics. The experimental results on static characteristics agree well with the theoretical results. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Static and Dynamic Characteristics of Rolling-Pad Journal Bearings in Super-Laminar Flow Regime | |
type | Journal Paper | |
journal volume | 110 | |
journal issue | 1 | |
journal title | Journal of Tribology | |
identifier doi | 10.1115/1.3261578 | |
journal fristpage | 73 | |
journal lastpage | 79 | |
identifier eissn | 1528-8897 | |
keywords | Flow (Dynamics) | |
keywords | Journal bearings | |
keywords | Turbulence | |
keywords | Stress | |
keywords | Friction | |
keywords | Force | |
keywords | Heat | |
keywords | Equations | |
keywords | Springs | |
keywords | Temperature distribution | |
keywords | Pressure | |
keywords | Lubrication | |
keywords | Bearings AND Damping | |
tree | Journal of Tribology:;1988:;volume( 110 ):;issue: 001 | |
contenttype | Fulltext |