Projektbeschreibung
Diamanten könnten sich als beste Freunde von Motoren erweisen
Motoren verfügen über zahlreiche bewegliche Teile, die Reibung, Wärme und Verschleiß an den Kontaktpunkten erzeugen. Metallische Gleitlager zählen dabei zu den wichtigsten beweglichen Teilen. In einem Motor gibt es verschiedene Arten von metallischen Gleitlagern. Damit alles rund läuft, müssen sie mit Öl geschmiert werden. Das EU-finanzierte Projekt DEBRA arbeitet daran, metallische Gleitlager durch synthetische Lager aus Diamanten zu ersetzen. Ihre Oberfläche kann viel glatter und härter gestaltet werden, wodurch weniger Wärme und geringerer Abrieb erzeugt wird. Damit könnte der Weg für eine Luftkühlung als Alternative zu Öl bereitet werden.
Ziel
This proposal is aimed at developing novel, super hard, non-lubricated air cooled bearings that would give a step change in minimizing the engine oil system and its complexity. An SFC gain of 0.1 to 0.3% is anticipated as a result of this project.
The project aims to achieve this by developing air cooled bearings using synthetic diamond. The novelty is in the surface finish of diamond rolling elements and mating raceways which can be improved substantially relative to today’s metallic bearing materials such that heat generation and frictional wear is minimized. Diamond offers superior thermal properties enabling thermal gradients and running clearances to be optimized.
This proposal aims to reduce oil system cost, weight and complexity by exploiting the properties of synthetic diamond material in the design and manufacture of novel bearings. The basic premise is that the surface finish of diamond rolling elements and mating raceways can be improved substantially relative to today’s metallic bearing materials such that heat generation and frictional wear is minimized. Diamond’s superior thermal properties enable thermal gradients and running clearances to be optimized using air rather than oil as the cooling medium.
The partners have assembled a consortium that has bearings expertise, capability in the manufacture, forming and metrology of synthetic diamond materials, and a proven track record in the design and evaluation of gas turbine air cooling schemes, with test facilities that will allow for friction and integrity proving from technology readiness level (TRL) 2 to 4. The consortium believe that all aspects of demonstration and industrialization can be successfully delivered with the work packages that have been assembled to TRL 4, with a final design complete for TRL 5 endurance tests.
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Aufforderung zur Vorschlagseinreichung
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RIA - Research and Innovation actionKoordinator
OX1 2JD Oxford
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