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The role of machining errors in dynamics of a turbocharger rotor supported on grooved full-floating ring bearings

Citace:
SMOLÍK, L.., POLACH, P.., HAJŽMAN, M.. The role of machining errors in dynamics of a turbocharger rotor supported on grooved full-floating ring bearings. In Proceedings DYMAMESI 2020. Prague: Institute of Thermomechanics, ASCR, v.v.i., 2020. s. 61-68. ISBN: 978-80-87012-73-4
Druh: STAŤ VE SBORNÍKU
Jazyk publikace: eng
Anglický název: The role of machining errors in dynamics of a turbocharger rotor supported on grooved full-floating ring bearings
Rok vydání: 2020
Místo konání: Prague
Název zdroje: Institute of Thermomechanics, ASCR, v.v.i.
Autoři: Ing. Luboš Smolík Ph.D. , Dr. Ing. Pavel Polach , doc. Ing. Michal Hajžman Ph.D.
Abstrakt EN: Full-floating ring bearings (FFRBs) cause nonlinear vibrations of the turbocharger rotors and are characteristic of high power loss. Both dynamic and tribological properties of FFRB can be improved if several shallow axial grooves are machined in the inner surface of the floating ring. The grooves are usually not manufactured precisely in order to keep production costs as low as possible. This work investigates the role of the machining errors on the dynamics of the turbocharger rotor. More specifically, the effects of the precisely-machined grooves on the dynamics of the system are explained. Then the influence of the uncertainties on both vibrations and hydrodynamic power losses in the bearings is investigated.
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