Effect of the controllable bearings lubricated by magnetically sensitive oil on vibration of rigid rotors

0539036 - ÚT 2021 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Zapoměl, Jaroslav - Ferfecki, P.
Effect of the controllable bearings lubricated by magnetically sensitive oil on vibration of rigid rotors.
ENGINEERING MECHANICS 2020. Brno: Brno University of Technology Institute of Solid Mechanics, Mechatronics and Biomechanics, 2020 - (Fuis, V.), s. 544-547. ISBN 978-80-214-5896-3. ISSN 1805-8248.
[International Conference Engineering Mechanics 2020 /26./. Brno (CZ), 24.11.2020-25.11.2020]
Institucionální podpora: RVO:61388998
Klíčová slova: controllable hydrodynamic bearing * composite magnetic fluids * increase of the load capacity * vibration attenuation * rigid rotors
Obor OECD: Applied mechanics
https://www.engmech.cz/im/doc/EM2020_proceedings.pdf

Dynamical properties of hydrodynamic bearings depend of the Sommerfeld number. To avoid rupture of the oil film of heavily loaded bearings or inducing self-excited oscillation of rotors operating at high angular velocities the Sommerfeld number should remain in a certain interval that depends of the bearing size and design. The only parameter that can be changed during the rotor running to adapt the Sommerfeld number and thus the bearing performance to the current operating conditions is the dynamical viscosity. This is offered by application of magnetic fluids as lubricants. This paper reports on a new design concept of a controllable hydrodynamic bearings lubricated by composite liquid. The research is focused on investigation of the possibilities of the control process on the load capacity of the bearings and on the rotor vibration amplitude attenuation.
Trvalý link: http://hdl.handle.net/11104/0316860