Design of the magnetically sensitive hydrodynamic bearing for the experimental rotor rig

0564891 - ÚT 2023 CZ eng C - Konferenční příspěvek (zahraniční konf.)
Ferfecki, P. - Zapoměl, Jaroslav - Molčan, M.
Design of the magnetically sensitive hydrodynamic bearing for the experimental rotor rig.
Engineering mechanics 2022. Book of full texts. Prague: Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, 2022 - (Fischer, C.; Náprstek, J.), s. 105-108. ISBN 978-80-86246-48-2. ISSN 1805-8248. E-ISSN 1805-8256.
[Engineering Mechanics 2022 - International Conference /27./28./. Milovy (CZ), 09.05.2022-12.05.2022]
Institucionální podpora: RVO:61388998
Klíčová slova: magnetically sentivive fluid * hydrodynamic lubrication * sommerfeld number * experimental measurement * load bearing capacity
Obor OECD: Applied mechanics
https://www.engmech.cz/improc/2022/105.pdf

In a hydrodynamic bearing, the relative motion between the rotating shaft and stationary housing is separated by a thin film of a lubricant. The magnetically sensitive lubricants with the promise of a semiactive control are able to improve the vibration response of the rotor system supported by the hydrodynamic bearings. A design of the magnetically sensitive hydrodynamic bearing is briefly introduced in this paper. The presented experimental rotor rig is proposed to analyse the large range of load conditions and rotational speeds of the bearing. The designed hydrodynamic bearing is intended to test the ferrofluids, magnetorheological oils, and nano-micro composite magnetic fluids. The apparent viscosity of the magnetically sensitive lubricant is altered by the magnetic field generated by the electric coil and thus the position of the bearing journal is shifted. The experimental measurement results show that the rheological behaviour of the lubrication layer with a magnetorheological fluid is significantly influenced by a magnetic field. The raising magnitude of the current in the electric coil leads to an increase in the bearing's load performance.
Trvalý link: https://hdl.handle.net/11104/0338026