Title:	Towards efficient and vibration-reducing full-floating ring bearings in turbochargers
Authors:	Smolík, Luboš Dyk, Štěpán
Citation:	SMOLÍK, L., DYK, Š. Towards efficient and vibration-reducing full-floating ring bearings in turbochargers. International Journal of Mechanical Sciences, 2020, roč. 175, č. June 1. ISSN 0020-7403.
Issue Date:	2020
Publisher:	Elsevier
Document type:	postprint postprint
URI:	2-s2.0-85083813108 http://hdl.handle.net/11025/39780
ISSN:	0020-7403
Keywords in different language:	rotor dynamics;multi-body dynamics;turbocharger;hydrodynamic lubrication;floating ring bearing
Abstract in different language:	Turbocharger rotors supported on full-floating ring bearings are highly nonlinear systems which are operated at high speeds. During operation, the rotor usually oscillates at sub-synchronous frequencies which result from fluid-induced instabilities. This work provides some suggestions for reducing the sub-synchronous vibrations and power losses in the bearings. This is done by introducing new designs for lubrication grooves, which are described in detail and thoroughly analyzed. Furthermore, it is shown that the stability of an outer film in the floating ring bearing can be influenced by subtle changes in the geometry of an inner film. The motion of the turbocharger rotor is described employing flexible multi-body dynamics. Forces in the floating ring bearings are evaluated numerically and flow through feed holes which are interconnecting the inner film with the outer film is considered.
Rights:	Plný text není přístupný. Plný text bude přístupný od 01. 03. 2022. © Elsevier
Appears in Collections:	Postprinty / Postprints (NTIS) OBD

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