German to English translations [PRO] Tech/Engineering - Energy / Power Generation / Gas turbine combustion chamber
German term or phrase:Gurtdichtung
This fits round a combustion chamber wall between the said wall and a hot gas housing. The seal comprises segments which abut by their end faces, forming a ring. The text later mentions "Gurtsegmente". No material is mentioned.
Die einzigen Dichtungen, die ich in diesem Zusammenhang kenne, sind Deckbanddichtungen (shroud band seals), die je nach Ausführung mit Spalt- oder Labyrinthdichtungen vorkommen.
Und - seal segments ist in Turbinentexten seeeehr geläufig.
Bernd, See below which may help. Unfortunately, this is from a patent abounding with inconsistencies, obvious omissions and grammatical errors. In the piece of text below, the "Dichtungssegmente" are also referred to as "Gurtsegmente" in other sections of the text, and "Gurtdichtung" is mostly replaced by "ringförmige Dichtung" : -
"Zur Vermeidung derartiger Leckageströmungen weisen die einzelnen Dichtungssegmente jeweils an ihren Endseiten sich gegenseitig durch Überlappung und Berührung charakterisierte Flächenabschnitte auf, die nach Zusammenfügen eine Art Labyrinthdichtung ergeben. Die zwischen beiden Dichtungssegmenten 10 vorhandene Labyrinthdichtung weist eine Stufenkontur 18 auf, wie aus Fig. ** ersichtlich ist, mit einem in Umfangsrichtung orientierten Stufenabschnitt".
Also: -
"wobei die Brennkammerwand in Umfangsrichtung vollständig mit einer ringförmigen Dichtung umgeben ist, die aus einer Vielzahl einzelner Dichtungssegmente besteht, die jeweils endseitig über Verbindungsstrukturen aneinander gefügt sind".
Patrick, would you please provide the German (con)text.
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(fibre) belt seal
Explanation: context: fibre belt, gas turbine, belt serves also as sealing:
1. Axial-flow compressor, more particularly a high-pressure compressor for a gas turbine engine, consisting of a rotor drum (2) driven by the turbine, with rotor blades (11 to 14) disposed in annular slots (19) on the outer circumference of the rotor drum (2) in the respective compressor stage, which are followed by stator vanes, with the rotor drum (2) being made of rotor rings (7 to 10) forming a one-piece annular component, with fiber belts (18) arranged on these rings in the areas of max. centrifugal load, consisting of fibers wound onto the rotor drum (2) and embedded in a high-temperature resistant polymer matrix, characterized in that the fiber belts (18) are arranged at the bottom of the annular slots (19) provided for blade retention beneath the blade roots held in these slots and that the fiber belts (18) are wound of different fiber materials, with the elasticity of the fiber material in the fiber belts (18) increasing towards the location surface on the rotor drum (2).
2. Axial-flow compressor in accordance with Claim 1, with the fiber belts (18) being made of carbon fibers, characterized in that the polymer matrix consists of epoxy resin with a heat resistance of up to 350° centigrade, applied by wet winding or subsequent infiltration of dry-wound carbon fibers.
3. Axial-flow compressor in accordance with Claim 1, characterized in that piezo fibers are wound into the fiber belts (18, 21), which are connected to a sensor to detect resistance changes caused by changes in length of the piezo fibers, which are symptomatic for the condition of the rotor drum (2).
4. Axial-flow compressor in accordance with Claim 1, characterized in that the fibers - to compensate heat expansion of the rotor drum (2) during operation - feature a reduced pre-load when winding the fiber belt (18, 21), or are wound onto a heated rotor drum, or in that an inner layer of the fiber belt consists of a thermoplastic material, acting as compensator for the thermal expansion of the rotor drum.
5. Axial-flow compressor in accordance with Claim 1, characterized in that a Tee-shaped extension (20) with fiber belts (18) wound onto the free location surfaces is formed onto the inner side of the rotor drum (2) beneath the rotor blades (11 to 14).
6. Axial-flow compressor in accordance with Claim 1, characterized in that a fiber belt (21) also serving as an abradable seal is wound in a groove or on the rotor drum (2) in the area downstream of the rotor blades (11 to 14) opposite the stator vanes.
EP-A1-1 406 019 vorbekannt. Zur Kompensation der Fliehkraftbelastung aufgrund der Anordnung der Rotorscheiben, die einen erheblichen Anteil am Gesamtgewicht des Kompressors und letztlich auch des Triebwerks haben und außerdem viel Bauraum beanspruchen, der nicht für andere Zwecke zur Verfügung steht, sind in den Bereichen höchster Fliehkraftbelastung Fasergurte angeordnet, die aus auf die Rotortrommel gewickelten, in eine hochtemperaturbeständige Polymermatrix eingebetteten Fasern bestehen. Zur Aufnahme der Fasergurte sind an der Rotortrommel besondere ringförmige, axiale Vorsprünge angebaut. Dadurch wird der durch Material- und Fertigungsaufwand und damit auch der Kostenaufwand erhöht.
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