Innovative Konzepte zu Waermehaushalt und Dichtungen von Triebwerken -Leckage-minimierte Dichtsysteme fuer Flugtriebwerke Abschlussbericht

New sliding materials and secondary sealing elements for the application of axial gas seals in gas turbines were developed. In addition, the cross-section, in comparison with existing gas seals, was considerably reduced. As a result of these two measures the seal can be used in gas turbines. The leak rates of all gas seals developed in this project are significantly below the leak rates of the conventional labyrinth seals used so far. When the gas-lubricated mechanical seal was operated on the test rig in the testing department as well as on the gas turbine test rig the sealing system with inner gas grooves showed a very good operating performance. The pressure limit of the radial gas seal is conflicting with an application in a gas turbine as it is exceeded in case of transient conditions. As a result of the extensive studies bases for the application of gas seals in future gas turbines could be set up. (orig.)Available from TIB Hannover: F99B14337+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman