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research-article

Dynamic Performance of an Oil Starved Squeeze Film Damper combined with a Cylindrical Roller Bearing

[+] Author and Article Information
Hans Meeus

Vrije Universiteit Brussel, Dept. of Mechanical Engineering, Pleinlaan 2, 1050 Brussels, Belgium
hans.meeus@vub.be

Jakob Fiszer

KU Leuven, Dept. of Mechanical Engineering, Celestijnenlaan 300B, 3001 Leuven, Belgium
jakob.fiszer@be.atlascopco.com

Gabriël-Mathieu Van De Velde

Vrije Universiteit Brussel, Dept. of Mechanical Engineering, Pleinlaan 2, 1050 Brussels, Belgium
gavdevel@vub.be

Björn Verrelst

Vrije Universiteit Brussel, Dept. of Mechanical Engineering, Pleinlaan 2, 1050 Brussels, Belgium
bjorn.verrelst@vub.be

Dirk Lefeber

Vrije Universiteit Brussel, Dept. of Mechanical Engineering, Pleinlaan 2, 1050 Brussels, Belgium
Dirk.Lefeber@vub.be

Patrick Guillaume

Vrije Universiteit Brussel, Dept. of Mechanical Engineering, Pleinlaan 2, 1050 Brussels, Belgium
patrick.guillaume@vub.be

Wim Desmet

KU Leuven, Dept. of Mechanical Engineering, Celestijnenlaan 300B, 3001 Leuven, Belgium
wim.desmet@kuleuven.be

1Corresponding author.

ASME doi:10.1115/1.4042418 History: Received July 09, 2018; Revised December 27, 2018

Abstract

Squeeze film dampers are widely used to dissipate mechanical energy caused by rotor vibrations. Especially turbomachine rotors, supported on little damped rolling element bearings, are primarily sensitive to unbalance excitation and thus high amplitude vibrations. To ensure safe operation, potential failure modes, such as an oil starved damper state, need to be well examined prior to the introduction in the ultimate industrial application. Hence, the aim of this research project is to evaluate the performance of the rotor support for a complete oil starvation of the squeeze film damper. An academic rotor dynamic test bench has been developed and briefly presented. Experimental testing has been conducted for two static radial load cases resembling the full load and idle condition of a certain turbomachine. Evidently, the measurement results exposed severe vibration problems. Even a split first whirl mode arises due to a pronounced anisotropic bearing stiffness. Moreover, for the least radially loaded bearing highly nonlinear behavior emerged at elevated unbalance excitation. Consequently, the rollers start to rattle which will have a negative effect on the overall bearing lifetime. To explain the nature of the nonlinear behavior, advanced quasi-static bearing simulations are exploited. A number of possible solutions are proposed in order to help mitigate the vibration issues.

Copyright (c) 2018 by ASME
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