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    On Error Torques of Squeeze-Film Cylindrical Journal Bearings

    Source: Journal of Tribology:;1968:;volume( 090 ):;issue: 001::page 191
    Author:
    C. H. T. Pan
    ,
    T. Chiang
    DOI: 10.1115/1.3601536
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The squeeze-film bearing has been considered for the output axis of high performance gyroscopes. Viewing this application, it is important that the parasitic torque of the bearing be very small. In the case of a squeeze-film journal bearing, parasitic torque can result from tolerance effects which disrupt rotational symmetry of the bearing. This problem has been studied by assuming ellipses for the tolerances of the journal and bearing surfaces as well as the squeeze motion, respectively. Each tolerance effect is assumed to be axially uniform. The mathematical problem is linearized with respect to each of the tolerances and the radial displacement of the journal. It was found that the parasitic torques do not depend on the radial displacement of the journal. The parasitic torques result from interactions among the three types of tolerance effects while each of the tolerances alone will not lead to any torque. Numerical estimates based on the geometry of a typical gyroscope and current fabrication practice shows such parasitic torques can seriously impair the accuracy of the gyroscope.
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      On Error Torques of Squeeze-Film Cylindrical Journal Bearings

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    http://yetl.yabesh.ir/yetl1/handle/yetl/130423
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    contributor authorC. H. T. Pan
    contributor authorT. Chiang
    date accessioned2017-05-09T00:13:42Z
    date available2017-05-09T00:13:42Z
    date copyrightJanuary, 1968
    date issued1968
    identifier issn0742-4787
    identifier otherJOTRE9-28542#191_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/130423
    description abstractThe squeeze-film bearing has been considered for the output axis of high performance gyroscopes. Viewing this application, it is important that the parasitic torque of the bearing be very small. In the case of a squeeze-film journal bearing, parasitic torque can result from tolerance effects which disrupt rotational symmetry of the bearing. This problem has been studied by assuming ellipses for the tolerances of the journal and bearing surfaces as well as the squeeze motion, respectively. Each tolerance effect is assumed to be axially uniform. The mathematical problem is linearized with respect to each of the tolerances and the radial displacement of the journal. It was found that the parasitic torques do not depend on the radial displacement of the journal. The parasitic torques result from interactions among the three types of tolerance effects while each of the tolerances alone will not lead to any torque. Numerical estimates based on the geometry of a typical gyroscope and current fabrication practice shows such parasitic torques can seriously impair the accuracy of the gyroscope.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleOn Error Torques of Squeeze-Film Cylindrical Journal Bearings
    typeJournal Paper
    journal volume90
    journal issue1
    journal titleJournal of Tribology
    identifier doi10.1115/1.3601536
    journal fristpage191
    journal lastpage198
    identifier eissn1528-8897
    treeJournal of Tribology:;1968:;volume( 090 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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