TY - JOUR
T1 - Development of herringbone grooved aerodynamic journal bearings for the support of ultra-high-speed rotors
AU - Tomioka, Jun
AU - Miyanaga, Norifumi
AU - Outa, Eisuke
AU - Takahashi, Takeshi
AU - Ogimoto, Takeharu
AU - Mori, Toshio
AU - Kagami, Fumihiko
PY - 2007/6
Y1 - 2007/6
N2 - The achievement of the ultra-high-speed rotation is needed for performance improvement of the turbo machinery. The ultra-high-speed rotors, supported by herringbone grooved aerodynamic journal bearings, have a good advantage in miniaturization of these machineries. The objective of this work is to study herringbone grooved aerodynamic journal bearings for support and ultra-high-speed rotor. This paper described about the effects of the grooves, the bearing clearance, the groove depth and bearing-support-methods of the herringbone grooved aerodynamic journal bearings in the ultra-high-speed rotational regions. Two types of bearing test device, rigidly support type and O-ring support type, were developed. The experimental works were conducted by elevating the supply pressure and the flow rate gradually with monitoring the behavior of the rotor in vertical type test devices. As the results of this works, a 6.0 mm diameter and 30.75 mm length rotor has been operated at a rotational speed greater than 509 000 rpm by using the herringbone grooved aerodynamic journal bearing which has the groove depth of 4 μm and is supported by two O-rings.
AB - The achievement of the ultra-high-speed rotation is needed for performance improvement of the turbo machinery. The ultra-high-speed rotors, supported by herringbone grooved aerodynamic journal bearings, have a good advantage in miniaturization of these machineries. The objective of this work is to study herringbone grooved aerodynamic journal bearings for support and ultra-high-speed rotor. This paper described about the effects of the grooves, the bearing clearance, the groove depth and bearing-support-methods of the herringbone grooved aerodynamic journal bearings in the ultra-high-speed rotational regions. Two types of bearing test device, rigidly support type and O-ring support type, were developed. The experimental works were conducted by elevating the supply pressure and the flow rate gradually with monitoring the behavior of the rotor in vertical type test devices. As the results of this works, a 6.0 mm diameter and 30.75 mm length rotor has been operated at a rotational speed greater than 509 000 rpm by using the herringbone grooved aerodynamic journal bearing which has the groove depth of 4 μm and is supported by two O-rings.
KW - Bearing
KW - Lubrication
KW - Rotary machnary
KW - Self-excited vibration
KW - Tribology
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U2 - 10.1299/kikaic.73.1840
DO - 10.1299/kikaic.73.1840
M3 - Article
AN - SCOPUS:34548207695
VL - 73
SP - 1840
EP - 1846
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
SN - 0387-5024
IS - 6
ER -