Original title: Reduction of the energy losses by application of controllable squeeze film dampers
Authors: Zapoměl, Jaroslav ; Ferfecki, Petr ; Kozánek, Jan
Document type: Papers
Conference/Event: Engineering Mechanics 2017 /23./, Svratka (CZ), 20170515
Year: 2017
Language: eng
Abstract: The unbalance induces lateral oscillations of rotors and forces transmitted to the rotor casing. The squeeze film dampers with integrated rolling element bearings represent a technological solution, which enables to reduce their magnitude, and consequently the resistance against the rotor rotation. To achieve optimum performance of the damping devices, their damping effect must be adapable to the current rotor speed. This paper reports a proposal of a controllable squeeze film damper, the damping effect of which is controlled mechanically by shifting its outer ring in the axial direction. The developed mathematical model of the damper is based on assumptions of the classical theory of lubrication and is completed with implementation of a gas cavitation. The results of the computational simulations show that an appropriate control of the damping force enables to reduce the energy losses in a wide range of operating speeds.
Keywords: controllable damping; energy losses reduction; friction in bearings; squeeze film damper
Project no.: GA15-06621S (CEP)
Funding provider: GA ČR
Host item entry: Engineering Mechanics 2017, ISBN 978-80-214-5497-2, ISSN 1805-8248

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0273606

Permalink: http://www.nusl.cz/ntk/nusl-363526


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Research > Institutes ASCR > Institute of Thermomechanics
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