Stability threshold of herringbone grooved aerodynamic journal bearings with external stiffness and damping elements

Jun Tomioka, Norifumi Miyanaga

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    Herringbone grooved aerodynamic journal bearings have better stability characteristics than plane aerodynamic journal bearings. In addition, the use of the flexibly supported bearings is one of the efficient way to improve the bearing stability. Therefore, the combination bearing systems have prospects of realization of ultra-high-speed operations. The purpose of this work is to evaluate the effect of the external stiffness and damping elements on the bearing stability. The Voigt rheological model was used for the external elements, in which the stiffness and the damping were treated as the linear elements. It was cleared that the stability boundary of the herringbone grooved aerodynamic journal bearings supported by the suitable stiffness and damping elements can be heightened more than three times compared with the rigidly supported bearings.

    Original languageEnglish
    Pages (from-to)1812-1818
    Number of pages7
    JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
    Volume76
    Issue number767
    Publication statusPublished - 2010 Jul

    Fingerprint

    Bearings (structural)
    Journal bearings
    Aerodynamics
    Damping
    Stiffness

    Keywords

    • External stiffness and damping elements
    • Hearringbone bearing
    • Lubrication
    • Self-Excited vibration
    • Stability threshold
    • Tribology

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Mechanics of Materials
    • Industrial and Manufacturing Engineering

    Cite this

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    abstract = "Herringbone grooved aerodynamic journal bearings have better stability characteristics than plane aerodynamic journal bearings. In addition, the use of the flexibly supported bearings is one of the efficient way to improve the bearing stability. Therefore, the combination bearing systems have prospects of realization of ultra-high-speed operations. The purpose of this work is to evaluate the effect of the external stiffness and damping elements on the bearing stability. The Voigt rheological model was used for the external elements, in which the stiffness and the damping were treated as the linear elements. It was cleared that the stability boundary of the herringbone grooved aerodynamic journal bearings supported by the suitable stiffness and damping elements can be heightened more than three times compared with the rigidly supported bearings.",
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    AU - Miyanaga, Norifumi

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