Effects of a Journal Bearing Clearance on Rotordynamics of Turbochargers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F15%3A43925872" target="_blank" >RIV/49777513:23520/15:43925872 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.icoev.org/images/ICoEV2015%20-%20Proceedings.pdf" target="_blank" >http://www.icoev.org/images/ICoEV2015%20-%20Proceedings.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Effects of a Journal Bearing Clearance on Rotordynamics of Turbochargers

Popis výsledku v původním jazyce

In the recent years, turbocharged engines have become more common because of better power-to-weight ratio (and thus lower consumption and emission of air pollutants). However, the better performance comes at a price because turbochargers operate at highspeeds - usually hundreds of thousands revolutions per minute - and tend to be fatigue and stability prone. For this reason, a turbocharger rotor has to be designed carefully with respect to its dynamic properties. The influence of a bearing clearance onstiffness and damping of a single-film journal bearing is well known and documented. Turbochargers, however, are often supported by floating journal bearings, which have two oil films linked by oil feed-holes. Such a bearing have two bearing clearances- between journal and floating ring and between floating ring and housing - which are determined by different temperatures of oil films and also dimensional tolerances. The following paper deals with differences between nominal (cold) and

Název v anglickém jazyce

Effects of a Journal Bearing Clearance on Rotordynamics of Turbochargers

Popis výsledku anglicky

In the recent years, turbocharged engines have become more common because of better power-to-weight ratio (and thus lower consumption and emission of air pollutants). However, the better performance comes at a price because turbochargers operate at highspeeds - usually hundreds of thousands revolutions per minute - and tend to be fatigue and stability prone. For this reason, a turbocharger rotor has to be designed carefully with respect to its dynamic properties. The influence of a bearing clearance onstiffness and damping of a single-film journal bearing is well known and documented. Turbochargers, however, are often supported by floating journal bearings, which have two oil films linked by oil feed-holes. Such a bearing have two bearing clearances- between journal and floating ring and between floating ring and housing - which are determined by different temperatures of oil films and also dimensional tolerances. The following paper deals with differences between nominal (cold) and

Druh

O - Ostatní výsledky

CEP obor

JT - Pohon, motory a paliva

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů