Titel Der Quetschöldämpfer - ein systemrelevantes Triboelement bei Flugtriebwerken
Autor Adrian Rienäcker, Wolfgang Diepolder
Infos zum Autor Dr.-Ing. Adrian Rienäcker
Leiter GP7000 NDT
MTU Aero Engines
Dachauer Str. 665
80995 München

Dr.-Ing. Wolfgang Diepolder
Leiter Strukturmechanik Gehäuse und Rotordynamik
MTU Aero Engines
Dachauer Str. 665 80995 München
Inhalt Zusammenfassung

Konzept der harten und weichen Rotorlagerung, konstruktive Umsetzung des Konzepts (Federkäfig, Quetschöldämpfer), Auslegung der Quetschöldämpfer seitliche Dichtung, Schmierstoffzuführung, Spalt) mit transienten Hochlaufsimulationen, Verhalten im Fehlerfall (Schaufelverlust).


The light-weight approach and fuel economy targets in today’s automotive engineering require tribosystems, which can withstand higher contact pressures associated with low coefficients of friction. The application of highperformance coatings represents one approach among others. This paper presents a novel coating-substrate system in comparison to newly developed DLC-/ta-C-coatings in a bench mark test procedure exerting slip-rolling conditions in the presence of liquid lubricants. Novel Zr-based thin film coatings can withstand at least 10 million cycles under initial Hertzian contact pressures of up to Pmax = 3.500 MPa and oil temperatures of at least 120°C associated with low coefficients of friction under mixed/boundary conditions. In comparison, the newly developed DLC-/ta-C-coatings are slip-rolling resistant for at least up to 10 million cycles at RT (some of them also at 120°C oil temperature) under Hertzian contact pressures of Pmax = 2.600/2.940 MPa. A bench mark compares the sliprolling resistance of these novel coatings with other state-of-the-art DLC-/ta-C- coatings.
Datum 2010