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An Advanced Approach for the Analysis of the Rotor Dynamics of a Ball Bearing Turbocharger
Engineering ProceedingsTurbochargers operate under highly transient conditions, which impose significant mechanical and thermal loads on their rotating components. When supported by ball bearings combined with squeeze film dampers, the rotor system exhibits complex nonlinear ...
Pavel Novotný +3 more
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Film thickness for different regimes of fluid-film lubrication [PDF]
Mathematical formulas are presented which express the dimensionless minimum film thickness for the four lubrication regimes found in elliptical contacts: isoviscous-rigid regime; piezoviscous-rigid regime; isoviscous-elastic regime; and piezoviscous ...
Dowson, D., Hamrock, B. J.
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Tribology OnlineTribological machine elements, such as rolling element bearings and gears, are often used in mechanical components and various industrial applications. The contact interfaces and sliding parts fundamentally consist of two solid and one liquid lubricant ...
Toshiharu Kazama
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Elastohydrodynamic film thickness formula based on X-ray measurements with a synthetic paraffinic oil [PDF]
An empirical elastohydrodynamic film thickness formula for heavily loaded contacts based upon X-ray film thickness measurements made with a synthetic paraffinic oil is presented.
Loewenthal, S. H. +2 more
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NASA helicopter transmission system technology program [PDF]
, 1983 The purpose of the NASA Helicopter Transmission System Technology Program is to improve specific mechanical components and the technology for combining these into advanced drive systems to make helicopters more viable and cost competitive for commerical ...
Zaretsky, E. V.
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Correlation of elastohydrodynamic film thickness measurements for fluorocarbon type 2 ester, and polyphenyl ether lubricants [PDF]
A minimum films thickness correlation applicable to heavily loaded elastohydrodynamic (EHD) contacts was formulated from experimental data obtained by an X-ray transmission technique.
Loewenthal, S. H. +2 more
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A computer solution for the dynamic load, lubricant film thickness and surface temperatures in spiral bevel gears [PDF]
A complete analysis of spiral bevel gear sets is presented. The gear profile is described by the movements of the cutting tools. The contact patterns of the rigid body gears are investigated. The tooth dynamic force is studied by combining the effects of
Chao, H. C., Cheng, H. S.
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Some limitations in applying classical EHD film-thickness formulae to a high-speed bearing [PDF]
Elastohydrodynamic film thickness was measured for a 20 mm ball bearing using the capacitance technique. The bearing was thrust loaded to 90, 448, and 778 N. The corresponding maximum stresses on the inner race were 1.28, 2.09, and 2.45 GPa.
Coy, J. J., Zaretsky, E. V.
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Jixie chuandong, 2017 Taking the rolling mill oil film bearing as the research object,the model of oil- water two-phase flow of elastohydrodynamic lubrication is established by using with thermal effect of the Reynolds equation. The effects of three common liner materials are
Wang Youqiang +4 more
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Film shape calculations on supercomputers [PDF]
Both scalar and vector operations are described to demonstrate usefulness of supercomputers (computers with peak computing speeds exceeding 100 million operative per second) in solving tribological problems. A simple kernel of the film shape calculations
Hamrock, B. J.
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