Název: Reduction of the energy losses by application of controllable squeeze film dampers
Autoři: Zapoměl, Jaroslav ; Ferfecki, Petr ; Kozánek, Jan
Typ dokumentu: Příspěvky z konference
Konference/Akce: Engineering Mechanics 2017 /23./, Svratka (CZ), 20170515
Rok: 2017
Jazyk: eng
Abstrakt: 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.
Klíčová slova: controllable damping; energy losses reduction; friction in bearings; squeeze film damper
Číslo projektu: GA15-06621S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Engineering Mechanics 2017, ISBN 978-80-214-5497-2, ISSN 1805-8248

Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0273606

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-363526


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference