Home Technology Schäden an Brennerkomponenten von Heavy Duty-Gasturbinen
Article
Licensed
Unlicensed Requires Authentication

Schäden an Brennerkomponenten von Heavy Duty-Gasturbinen

  • Andreas Neidel , Biljana Matijasevic-Lux , Susanne Riesenbeck , Thomas Ullrich , Jörg Völker and Sebastian Wallich
Published/Copyright: May 13, 2013
Become an author with De Gruyter Brill

Kurzfassung

Brenner sind Schlüsselkomponenten in Turbomaschinen mit interner Verbrennung. Sie ermöglichen in Großgasturbinen für Kraftwerke eine besonders magere Verbrennung und tragen so wesentlich zum wirtschaftlichen Betrieb bei. Abhängig vom Design sind sie häufig statisch und dynamisch hoch beansprucht. Bei der Fertigung dieser sowohl geometrisch als auch werkstofftechnisch komplexen Bauteile spielen schmelzschweisstechnische Fügeverbindungen eine wichtige Rolle. An drei ausgewählten Schadensbeispielen, die mit gerissenen Schweissnähten in Zusammenhang stehen, wird gezeigt, dass fast immer eine Kombination mehrerer Ursachen schadensauslösend wirkt. Besonderer Wert wird dabei auf die Betrachtung konstruktions-, fertigungs-, montage- und betriebsbedingter Einflüsse und Ursachen gelegt. Die als Datenträger wichtigen Bruchflächen der Schadensteile zeigen in den vorgestellten Fällen Schwingbrüche und Heißrisse als werkstofftechnische Versagensmechanismen.

Abstract

Burners are key components in turbo-machines with internal combustion. In large gas turbines for power stations they permit particularly lean combustion and thus contribute considerably to the economic operation of the turbine. Depending upon the actual design they are often stressed both statically and dynamically. In the fabrication of these both geometrically and materially complex components, fusion welded joints play an important role. With reference to three separate failure investigations involving cracked weld seams it is shown that the failure of the component is almost always the result of a combination of a number of factors. Particular attention is paid to the construction, fabrication, assembly and operating effects and causes. In the examples presented, the fracture surfaces of the failed components, as important sources of information, reveal fatigue fractures and hot cracking to be the modes of failure.


Dr.-Ing. Andreas Neidel was born in 1961 and studied mechanical engineering at IH Berlin. He got his doctorate there in 1991 with a thesis on high speed heat treatment of low alloy steel. In 1992 he joined Siemens‘ Energy Sector. Having worked ever since in quality management functions, he has been manager of the metallography laboratory and later the entire materials testing laboratory. Since May of 2007 he heads the laboratories on the premises of the Berlin Gas Turbine Plant. Since August of that same year he also teaches materials testing at Lette-Verein Berlin.

Susanne Riesenbeck joined the Gas Turbine Plant of Siemens‘ Energy Sector in 1984 and first underwent vocational training there. As a materials testing technician, one of the first fields of her professional endevours was steam turbine service, namely remaining lifetime assessment by means of the replica technique. She is a metallographer and one of the principal failure analysts in the materials testing laboratory. Her main fields of expertise comprise microstructural analyses of steel and iron castings.


References/Literatur

[1] Neidel, A.; Yao, C.: Practical Failure Analysis 2003, Volume 3 (6), 4146.10.1007/BF02717508Search in Google Scholar

[2] ASM Handbook, Vol. 11: Failure Analysis and Prevention, Sixth printing, American Society for Metals, Handbook Committee, 1998.Search in Google Scholar

[3] Seume, J.; Lechner, C. (Ed.): Stationäre Gasturbinen, Springer-Verlag, Berlin, Heielberg, Deutschland, 2003.10.1007/978-3-662-10016-5Search in Google Scholar

Erhalten: 2009-3-6
Angenommen: 2009-11-13
Online erschienen: 2013-05-13
Erschienen im Druck: 2010-03-01

© 2010, Carl Hanser Verlag, München

Downloaded on 9.12.2025 from https://www.degruyterbrill.com/document/doi/10.3139/147.110056/html
Scroll to top button