TY - JOUR
T1 - Stability threshold of herringbone grooved aerodynamic journal bearings with external stiffness and damping elements
AU - Tomioka, Jun
AU - Miyanaga, Norifumi
PY - 2010/7
Y1 - 2010/7
N2 - 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.
AB - 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.
KW - External stiffness and damping elements
KW - Hearringbone bearing
KW - Lubrication
KW - Self-Excited vibration
KW - Stability threshold
KW - Tribology
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U2 - 10.1299/kikaic.76.1812
DO - 10.1299/kikaic.76.1812
M3 - Article
AN - SCOPUS:77957298281
SN - 0387-5024
VL - 76
SP - 1812
EP - 1818
JO - Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
JF - Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
IS - 767
ER -