An Experimental Study of Static and Dynamic Characteristics of a 580mm(22.8in.) Diameter Direct Lubrication Tilting Pad Journal BearingSource: Journal of Tribology:;2006:;volume( 128 ):;issue: 001::page 146DOI: 10.1115/1.2114929Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Direct lubrication tilting pad journal bearings (DLTPJ bearings) have rarely been applied to large-scale rotating machinery, such as turbines or generators, whose journal diameters are more than 500mm. In this paper, static and dynamic characteristics of a 580mm(22.8in.) diameter DLTPJ bearing were studied experimentally using a full-scale bearing test rig. In the static test, distribution of metal temperature, oil film pressure, and bearing loss were measured in changing oil flow rate, with mean bearing pressure ranging up to 2.9MPa. The maximum metal temperature of the DLTPJ bearing was compared to that of a conventional flood lubrication bearing, and it was confirmed that the direct lubrication could increase load capacity. In the dynamic test, spring and damping coefficients of oil film were obtained by exciting the bearing casing that was floated by air bellows. These data will be used for analysis and design of steam turbine rotors and their bearing systems. Also, vibration of pads was investigated because metal failure on upper pads due to vibration has been found in some actual machines. In order to generate oil film pressure on the surface of upper pads, a Rayleigh-step was machined there, and it was confirmed that vibration was reduced by the Rayleigh-step.
keyword(s): Pressure , Flow (Dynamics) , Lubrication , Bearings , Journal bearings , Stress , Temperature , Metals AND Vibration ,
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contributor author | Kazunori Ikeda | |
contributor author | Toshio Hirano | |
contributor author | Tatsuo Yamashita | |
contributor author | Makoto Mikami | |
contributor author | Hitoshi Sakakida | |
date accessioned | 2017-05-09T00:21:51Z | |
date available | 2017-05-09T00:21:51Z | |
date copyright | January, 2006 | |
date issued | 2006 | |
identifier issn | 0742-4787 | |
identifier other | JOTRE9-28738#146_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/134776 | |
description abstract | Direct lubrication tilting pad journal bearings (DLTPJ bearings) have rarely been applied to large-scale rotating machinery, such as turbines or generators, whose journal diameters are more than 500mm. In this paper, static and dynamic characteristics of a 580mm(22.8in.) diameter DLTPJ bearing were studied experimentally using a full-scale bearing test rig. In the static test, distribution of metal temperature, oil film pressure, and bearing loss were measured in changing oil flow rate, with mean bearing pressure ranging up to 2.9MPa. The maximum metal temperature of the DLTPJ bearing was compared to that of a conventional flood lubrication bearing, and it was confirmed that the direct lubrication could increase load capacity. In the dynamic test, spring and damping coefficients of oil film were obtained by exciting the bearing casing that was floated by air bellows. These data will be used for analysis and design of steam turbine rotors and their bearing systems. Also, vibration of pads was investigated because metal failure on upper pads due to vibration has been found in some actual machines. In order to generate oil film pressure on the surface of upper pads, a Rayleigh-step was machined there, and it was confirmed that vibration was reduced by the Rayleigh-step. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | An Experimental Study of Static and Dynamic Characteristics of a 580mm(22.8in.) Diameter Direct Lubrication Tilting Pad Journal Bearing | |
type | Journal Paper | |
journal volume | 128 | |
journal issue | 1 | |
journal title | Journal of Tribology | |
identifier doi | 10.1115/1.2114929 | |
journal fristpage | 146 | |
journal lastpage | 154 | |
identifier eissn | 1528-8897 | |
keywords | Pressure | |
keywords | Flow (Dynamics) | |
keywords | Lubrication | |
keywords | Bearings | |
keywords | Journal bearings | |
keywords | Stress | |
keywords | Temperature | |
keywords | Metals AND Vibration | |
tree | Journal of Tribology:;2006:;volume( 128 ):;issue: 001 | |
contenttype | Fulltext |