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    An Experimental Study of Static and Dynamic Characteristics of a 580mm(22.8in.) Diameter Direct Lubrication Tilting Pad Journal Bearing

    Source: Journal of Tribology:;2006:;volume( 128 ):;issue: 001::page 146
    Author:
    Kazunori Ikeda
    ,
    Toshio Hirano
    ,
    Tatsuo Yamashita
    ,
    Makoto Mikami
    ,
    Hitoshi Sakakida
    DOI: 10.1115/1.2114929
    Publisher: 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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      An Experimental Study of Static and Dynamic Characteristics of a 580mm(22.8in.) Diameter Direct Lubrication Tilting Pad Journal Bearing

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    http://yetl.yabesh.ir/yetl1/handle/yetl/134776
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    contributor authorKazunori Ikeda
    contributor authorToshio Hirano
    contributor authorTatsuo Yamashita
    contributor authorMakoto Mikami
    contributor authorHitoshi Sakakida
    date accessioned2017-05-09T00:21:51Z
    date available2017-05-09T00:21:51Z
    date copyrightJanuary, 2006
    date issued2006
    identifier issn0742-4787
    identifier otherJOTRE9-28738#146_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/134776
    description abstractDirect 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.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleAn Experimental Study of Static and Dynamic Characteristics of a 580mm(22.8in.) Diameter Direct Lubrication Tilting Pad Journal Bearing
    typeJournal Paper
    journal volume128
    journal issue1
    journal titleJournal of Tribology
    identifier doi10.1115/1.2114929
    journal fristpage146
    journal lastpage154
    identifier eissn1528-8897
    keywordsPressure
    keywordsFlow (Dynamics)
    keywordsLubrication
    keywordsBearings
    keywordsJournal bearings
    keywordsStress
    keywordsTemperature
    keywordsMetals AND Vibration
    treeJournal of Tribology:;2006:;volume( 128 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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