WO1998041736A1 - Suction duct connection in a gas turbine - Google Patents

Suction duct connection in a gas turbine Download PDF

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Publication number
WO1998041736A1
WO1998041736A1 PCT/DE1998/000671 DE9800671W WO9841736A1 WO 1998041736 A1 WO1998041736 A1 WO 1998041736A1 DE 9800671 W DE9800671 W DE 9800671W WO 9841736 A1 WO9841736 A1 WO 9841736A1
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WO
WIPO (PCT)
Prior art keywords
air intake
duct
wedge
molded seal
gas turbine
Prior art date
Application number
PCT/DE1998/000671
Other languages
German (de)
French (fr)
Inventor
Siegfried BÄHR
Ludwin Ludwig
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1998041736A1 publication Critical patent/WO1998041736A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/28—Arrangement of seals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/005—Sealing means between non relatively rotating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants

Definitions

  • the invention relates to a connection between an air intake duct of an air intake system and an intake duct of a gas turbine compressor.
  • the air required for the combustion of a fuel in a gas turbine is supplied to the combustion chamber of the gas turbine via an air intake system.
  • the gas turbine converts the thermal energy generated during combustion in connection with a generator into electrical energy.
  • Such an air intake system can, for example, have a length of 12 m and an outer cone of 4 m. It is easy to see that even small manufacturing or assembly tolerances can have a significant impact, for example when the individual channels of the air intake system are to be connected to one another and the manufacturing and assembly tolerances add up. This can be particularly disadvantageous if the air intake duct is to be connected to an input duct of a gas turbine compressor.
  • the channels are brought together with the interposition of a seal, for example a bitumen-impregnated PU foam tape, in such a way that no mechanical stresses occur and a tight connection is created.
  • a seal for example a bitumen-impregnated PU foam tape
  • the air intake duct is not guided very precisely to the inlet duct and the sealing surface of the air intake duct is sufficiently dimensionally stable nales to the sealing surface of the input channel is not guaranteed, the seal or parts of it can come loose during operation of the gas turbine and get into the gas turbine compressor. This, as well as any foreign bodies that are also sucked in, can damage the blades of the gas turbine and lead to a failure of the system.
  • the object of the invention is therefore to provide a connection between an air intake duct of an air intake system and an input duct of a gas turbine compressor in such a way that with good sealing of the ducts it is avoided that parts can get into the gas turbine compressor.
  • the seal at least approximately wedge-shaped molded seal wedges with the sealing surfaces of the channels, so that even with slight dimensional discrepancies in the assignment of air intake duct and inlet duct to one another, the seal at least approximately wedge-shaped molded seal or parts of it can no longer get into the gas turbine compressor.
  • Wedge angle ß of this molded seal is approximately equal to the angle ⁇ that the sealing surface of the air intake duct occupies with the sealing surface of the input duct. It has proven particularly advantageous if the wedge angle ⁇ is (5 +/- 4) ° larger than the angle ⁇ . To position this molded seal, support tabs and / or a tensioning strap can be provided which engage on the further surface of this molded seal, which is remote from the wedge angle ⁇ . This molded seal is thus held in the predetermined position when the channels are joined, in which it ensures a good seal.
  • support straps in connection with the tensioning strap is particularly advantageous.
  • the tensioning band is placed around the surface of this molded seal that is distant from the wedge angle ß.
  • this molded seal is then pressed between the sealing surfaces, the support tabs advantageously preventing the tensioning strap from tilting.
  • the air intake duct and the input duct can be connected to one another in a particularly advantageous manner via clamping means. This is especially true if they are designed as a clamp screw connection.
  • a clamp screw connection can, for example, have a fixed connection to the air intake duct and engage with a clamp in a groove provided on the inlet flange of the inlet duct. This eliminates screw through holes on the inlet flange of the gas turbine. Quick assembly is also possible.
  • FIG. 1 shows a detail of a longitudinal section of a connection between an air intake duct of an air intake system and an input duct of a gas turbine compressor according to the invention
  • 2 shows a cross section of the connection according to FIG.
  • a connection between an air intake duct 1 of an air intake system and an input duct 2 of a gas turbine compressor is shown.
  • a sealing surface 3 of the air intake duct 1 is or is connected to a sealing surface 4 of the inlet duct 2 via an at least approximately wedge-shaped molded seal 5.
  • Such an at least approximately wedge-shaped molded seal 5 can wedge with or on the sealing surfaces 3, 4 and thus can no longer get into the inlet channel 2 of the gas turbine compressor.
  • the sealing surfaces 3, 4 take one
  • the wedge angle ⁇ of this molded seal 5 is approximately equal to the angle ⁇ .
  • the angle ⁇ is particularly preferably larger by (5 +/- 4) ° than the angle ⁇ . As a result, a particularly large contact area between the sealing surfaces 3, 4 and this molded seal 5 is obtained with a good wedge effect.
  • the sealing surfaces 3, 4 can also be aligned at least approximately parallel to one another, although using an at least approximately wedge-shaped molded seal 5 prevents it from entering the input channel 2, however, the contact surface between the Sealing surfaces 3,4 and this form seal 5 reduced.
  • the at least approximately wedge-shaped molded seal 5 has the cross section of a diagonally cut rectangle. It is therefore particularly well adapted to the sealing surfaces 3, 4, in particular when the sealing surface 4 of the input channel 2 is approximately perpendicular to the central axis of the input channel 2 and the sealing surface 3 of the air intake duct 1 is at an angle to this central one Axis occupies. With a corresponding configuration of the sealing surfaces 3, 4, however, a wedge-shaped molded seal 5 can also be used, for example, which is at least approximately symmetrical to its central axis.
  • spacers 6 made of plastic or sheet metal are inserted between the outer inlet cone 7 of the air intake duct 1 and the outer compressor flange 8 of the input duct 2.
  • the spacers 6, which define the distance between the air intake duct 1 and the inlet duct 2 are inserted from the outside on the circumference of the inlet cone 7 and from the inside at the end faces of the inlet cone 7.
  • clamping means 9 which are preferably designed as a clamp screw connection, so that the so-called inlet cone is connected to the housing of the air intake duct 1.
  • the clamping means 9 can be fastened, for example, with an end 10 to the air intake duct 1 via a swivel joint, and to a recess 14 on the inlet duct 2 via a clamp element 11, which is designed with a bore 12 for a threaded part 13 connected to the end 10 or grip the flange of the compressor.
  • a nut 16 engaging the second end 15 of the threaded part 13, the air intake duct 1 and the inlet duct 2 are adjusted towards one another and against the spacer parts 6 and are positioned in relation to one another.
  • the respective positions of the nuts 16 on the respective threaded part 13, or the distance between the swivel joint and the clamp part 11, and the position of each clamping means 9 on the input channel 2 and each clamping means 9 are preferably identified. This ensures that the air intake duct 1 and the input channel 2 can be adjusted again after the connection has been disconnected.
  • the wedge-shaped molded seal 5 can be designed as an integral part or as a band. If the wedge-shaped molded seal 5 is designed as a band, it must be cut to the required length and the cut edges must be glued together. Thereafter, at the end of the assembly, the air intake duct 1 and the input duct 2 can be moved to the end position using the tensioning means 9, with a corresponding assignment on the input duct 2, and by activating the nuts 16, m.
  • a tensioning band 17 is assigned to the sealing surfaces 18, 19 of the at least approximately wedge-shaped molded seal 5, ie the further outer surface 20 opposite the wedge angle ⁇ , of this molded seal 5 along its circumference. From FIG. 2 in particular it follows that the tensioning band 17 has at least one, in the exemplary embodiment two, tensioning points 21, 22, by actuating which the tensioning band 17 shortens and thus this wedge-shaped molded seal 5 can be printed between the sealing surfaces 3, 4.
  • this wedge-shaped molded seal 5 maintains its position when the air intake duct 1 is clamped to the inlet duct 2 by the clamping means 9 and is not pressed out of the groove formed by the sealing surfaces 3, 4.
  • support tabs 23 can be provided which are supported, for example, on the air intake duct 1 and wedge-shaped on the further surface 20 thereof Form seal 5 rest. The strap 17 is then placed on the outside of the support tabs 23.
  • the final assembly then takes place, as already explained, in that the air intake duct 1 and the input duct 2 are assigned to the end position by positioning and tensioning the clamping means 9. After the final assembly has been carried out, it may be necessary to retighten the tensioning points 21, 22 so that the tensioning band 17 is placed in a close connection around this wedge-shaped molded seal 5.
  • the support tabs 23 are arranged offset by 30 ° from one another on the circumference of the channels 1, 2 and at least four tensioning means 9 which are also offset equally on the circumference
  • tensioning elements 9 can also have a fixed connection on the inlet duct 2 and the clamp parts 11 can then engage the air intake duct 1.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention relates to a connection between an air suction duct in an air suction system and an inlet channel of a gas turbine compressor. According to the invention, the sealing surface (3) of the air suction duct (1) and the sealing surface (4) of the inlet duct (2) are connected to each other by a structural gasket (5) which is at least approximately wedge-shaped. The at least approximately wedge-shaped structural gasket (5) can therefore no longer be suctioned by the gas turbine compressor leading to damage thereof.

Description

Beschreibungdescription
Ansaugkanalverbindung einer GasturbineIntake duct connection of a gas turbine
Die Erfindung bezieht sich auf eine Verbindung zwischen einem Luftansaugkanal eines Luf ansaugsystemes und einem Ansaugkanal eines Gasturbinenkompressors .The invention relates to a connection between an air intake duct of an air intake system and an intake duct of a gas turbine compressor.
Die für die Verbrennung eines Brennstoffes in einer Gastur- bine benötigte Luft wird über ein Luftansaugsystem der Brennkammer der Gasturbine zugeführt. Die Gasturbine wandelt die bei der Verbrennung entstehende Wärmeenergie in Verbindung mit einem Generator in elektrische Energie. Ein solches Luftansaugsystem kann beispielsweise eine Länge von 12 m und ei- nen Außenkonus von 4 m einnehmen. Es ist leicht ersichtlich, daß sich schon geringe Fertigungs- oder Montagetoleranzen erheblich auswirken können, beispielsweise dann, wenn die einzelnen Kanäle des Luftansaugsystemes miteinander verbunden werden sollen und sich die Fertigungs- und Montagetoleranzen addieren. Besonders nachteilig kann sich dies auswirken, wenn der Luftansaugkanal mit einem Eingangskanal eines Gasturbi- nenkompressors verbunden werden soll.The air required for the combustion of a fuel in a gas turbine is supplied to the combustion chamber of the gas turbine via an air intake system. The gas turbine converts the thermal energy generated during combustion in connection with a generator into electrical energy. Such an air intake system can, for example, have a length of 12 m and an outer cone of 4 m. It is easy to see that even small manufacturing or assembly tolerances can have a significant impact, for example when the individual channels of the air intake system are to be connected to one another and the manufacturing and assembly tolerances add up. This can be particularly disadvantageous if the air intake duct is to be connected to an input duct of a gas turbine compressor.
Hierbei ist es besonders wichtig, daß die Kanäle unter Zwi- schenlage einer Dichtung, beispielsweise eines bitumengetränkten PU-Schaumstoff-Bandes, so zusammengeführt werden, daß hierbei keine mechanischen Spannungen auftreten und eine dichte Verbindung geschaffen wird. Mittels am Umfang des Gasturbinenflansches des Eingangskanales angeordneten Schrau- ben, die mit am Außenkonus des Luftansaugkanales angebrachten Winkelpratzen in axialer Richtung der Gasturbine verschraubt werden, soll die erforderliche Dichtkraft durch Verpressung der Dichtung aufgebracht werden. Ist der Luftansaugkanal nicht sehr genau an den Eingangskanal geführt und ist eine ausreichende Maßhaltigkeit der Dichtfläche des Luftansaugka- nales zur Dichtflache des Eingangskanales nicht gewahrleistet, so kann sich im Betrieb der Gasturbine die Dichtung oder Teile davon ablosen und in den Gasturbinenkompressor gelangen. Dies sowie gegebenenfalls ebenfalls eingesaugte Fremdkörper können die Schaufeln der Gasturbine beschädigen und zu einem Ausfall der Anlage fuhren.It is particularly important here that the channels are brought together with the interposition of a seal, for example a bitumen-impregnated PU foam tape, in such a way that no mechanical stresses occur and a tight connection is created. By means of screws arranged on the circumference of the gas turbine flange of the inlet duct, which are screwed in the axial direction of the gas turbine with angle claws attached to the outer cone of the air intake duct, the required sealing force is to be applied by pressing the seal. If the air intake duct is not guided very precisely to the inlet duct and the sealing surface of the air intake duct is sufficiently dimensionally stable nales to the sealing surface of the input channel is not guaranteed, the seal or parts of it can come loose during operation of the gas turbine and get into the gas turbine compressor. This, as well as any foreign bodies that are also sucked in, can damage the blades of the gas turbine and lead to a failure of the system.
Aufgabe der Erfindung ist es daher, eine Verbindung zwischen einem Luftansaugkanal eines Luftansaugsystemes und einem Em- gangskanal eines Gasturbinenkompressors so auszufuhren, daß bei guter Abdichtung der Kanäle vermieden ist, daß Teile in den Gasturbinenkompressor gelangen können.The object of the invention is therefore to provide a connection between an air intake duct of an air intake system and an input duct of a gas turbine compressor in such a way that with good sealing of the ducts it is avoided that parts can get into the gas turbine compressor.
Die Aufgabe wird erfmdungsgemaß durch den Gegenstand des Pa- tentanspruches 1 und ein Verfahren nach dem Patentanspruch 8 gelost .The object is achieved according to the invention by the subject matter of patent claim 1 and a method according to patent claim 8.
Vorteil der Erfindung ist, daß die Dichtflache des Luftansaugkanales und die Dichtflache des Eingangskanales über eine zumindest annähernd keilförmige Formdichtung miteinander mThe advantage of the invention is that the sealing surface of the air intake duct and the sealing surface of the input duct are connected to one another via an at least approximately wedge-shaped molded seal
Verbindung stehen. Ist hierbei die Keilspitze der zumindest annähernd keilförmigen Formdichtung zum Zentrum der Kanäle gerichtet, so verkeilt sich die zumindest annähernd keilförmige Formdichtung mit den Dichtflachen der Kanäle, so daß auch bei geringen Maßunstimmigkeiten bei der Zuordnung von Luftansaugkanal und Eingangskanal zueinander, die Dichtung zumindest annähernd keilförmige Formdichtung oder Teile davon nicht mehr m den Gasturbinenkompressor gelangen können.Connect. If the wedge tip of the at least approximately wedge-shaped molded seal is directed towards the center of the channels, the at least approximately wedge-shaped molded seal wedges with the sealing surfaces of the channels, so that even with slight dimensional discrepancies in the assignment of air intake duct and inlet duct to one another, the seal at least approximately wedge-shaped molded seal or parts of it can no longer get into the gas turbine compressor.
Eine Verbesserung der Keilwirkung wird erreicht, wenn derAn improvement in the wedge effect is achieved if the
Keilwinkel ß dieser Formdichtung ungefähr gleich dem Winkel α ist, den die Dichtflache des Luftansaugkanales mit der Dichtflache des Eingangskanales einnimmt. Es hat sich als besonders vorteilhaft erwiesen, wenn der Keilwinkel ß um (5 +/- 4)° großer als der Winkel α ist. Zur Positionierung dieser Formdichtung können Stützlaschen und/oder ein Spannband vorgesehen sein, die an der dem Keilwinkel ß fernen, weiteren Fläche dieser Formdichtung angreifen. Diese Formdichtung wird somit beim Zusammenfügen der Ka- näle in der vorgegebenen Position gehalten, in der sie eine gute Abdichtung gewährleistet.Wedge angle ß of this molded seal is approximately equal to the angle α that the sealing surface of the air intake duct occupies with the sealing surface of the input duct. It has proven particularly advantageous if the wedge angle β is (5 +/- 4) ° larger than the angle α. To position this molded seal, support tabs and / or a tensioning strap can be provided which engage on the further surface of this molded seal, which is remote from the wedge angle β. This molded seal is thus held in the predetermined position when the channels are joined, in which it ensures a good seal.
Besonders vorteilhaft ist die Verwendung von Stützlaschen in Verbindung mit dem Spannband. Beim Zusammenfügen der Dicht- flächen der Kanäle wird das Spannband um die dem Keilwinkel ß ferne Fläche dieser Formdichtung gelegt . Beim Spannen des Spannbandes wird dann diese Formdichtung zwischen die Dichtflächen gedrückt, wobei die Stützlaschen ein Verkippen des Spannbandes vorteilhaft verhindern.The use of support straps in connection with the tensioning strap is particularly advantageous. When joining the sealing surfaces of the channels, the tensioning band is placed around the surface of this molded seal that is distant from the wedge angle ß. When the tensioning strap is tensioned, this molded seal is then pressed between the sealing surfaces, the support tabs advantageously preventing the tensioning strap from tilting.
Besonders vorteilhaft können der Luftansaugkanal und der Eingangskanal über Spannmittel miteinander in Verbindung gebracht werden. Dies gilt insbesondere dann, wenn diese als Klammerschraubverbindung ausgeführt sind. Eine solche Klam- merschraubverbindung kann beispielsweise eine feste Verbindung zum Luftansaugkanal haben und mit einer Klammer in eine am Eingangsflansch des Eingangskanales vorgesehene Nut eingreifen. Es entfallen somit Schraubendurchgangslöcher am Eingangsflansch der Gasturbine. Zudem ist eine schnelle Montage möglich.The air intake duct and the input duct can be connected to one another in a particularly advantageous manner via clamping means. This is especially true if they are designed as a clamp screw connection. Such a clamp screw connection can, for example, have a fixed connection to the air intake duct and engage with a clamp in a groove provided on the inlet flange of the inlet duct. This eliminates screw through holes on the inlet flange of the gas turbine. Quick assembly is also possible.
Weitere Vorteile und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungεbeispie- les anhand der Zeichnung in Verbindung mit den Unteransprü- chen. Es zeigten:Further advantages and details of the invention result from the following description of an exemplary embodiment with reference to the drawing in conjunction with the subclaims. It showed:
FIG 1 einen Ausschnitt eines Längsschnittes einer Verbindung zwischen einem Luftansaugkanal eines Luftan- saugsysten.es und einem Eingangskanal eines Gaεtur- binenkompressors nach der Erfindung, und FIG 2 einen Querschnitt der Verbindung nach FIG 1.1 shows a detail of a longitudinal section of a connection between an air intake duct of an air intake system and an input duct of a gas turbine compressor according to the invention, and 2 shows a cross section of the connection according to FIG.
In den Figuren ist eine Verbindung zwischen einem Luftansaugkanal 1 eines Luftansaugsystemes und einem Eingangskanal 2 eines Gasturbinenkompressors gezeigt . Hierbei wird oder ist eine Dichtfläche 3 des Luftansaugkanales 1 über eine zumindest annähernd keilförmige Formdichtung 5 mit einer Dichtfläche 4 des Eingangskanales 2 in Verbindung gebracht. Eine solche zumindest annähernd keilförmige Formdichtung 5 kann sich mit oder an den Dichtflächen 3, 4 verkeilen und somit nicht mehr in den Eingangskanal 2 des Gasturbinenkompressors gelangen. Im Ausführungsbeispiel nehmen die Dichtflächen 3,4 einenIn the figures, a connection between an air intake duct 1 of an air intake system and an input duct 2 of a gas turbine compressor is shown. Here, a sealing surface 3 of the air intake duct 1 is or is connected to a sealing surface 4 of the inlet duct 2 via an at least approximately wedge-shaped molded seal 5. Such an at least approximately wedge-shaped molded seal 5 can wedge with or on the sealing surfaces 3, 4 and thus can no longer get into the inlet channel 2 of the gas turbine compressor. In the exemplary embodiment, the sealing surfaces 3, 4 take one
Winkel α zueinander ein. Es hat sich als vorteilhaft erwiesen, wenn der Keilwinkel ß dieser Formdichtung 5 ungefähr gleich dem Winkel α ist . Besonders bevorzugt ist der Winkel ß um (5 +/-4)° größer als der Winkel α. Hierdurch wird eine besonders große Kontaktfläche zwischen den Dichtflächen 3, 4 und dieser Formdichtung 5 bei guter Keilwirkung erhalten.Angle α to each other. It has proven to be advantageous if the wedge angle β of this molded seal 5 is approximately equal to the angle α. The angle β is particularly preferably larger by (5 +/- 4) ° than the angle α. As a result, a particularly large contact area between the sealing surfaces 3, 4 and this molded seal 5 is obtained with a good wedge effect.
Im Rahmen der Erfindung können die Dichtflächen 3,4 aber auch zumindest annähernd parallel zueinander ausgerichtet sein, wobei unter Verwendung einer zumindest annähernd keilförmigen Formdichtung 5 zwar verhindert wird, daß diese in den Eingangskanal 2 gelangen kann, jedoch ist hierbei die Kontakt- fläche zwischen den Dichtflächen 3,4 und dieser Formdichtung 5 reduziert .In the context of the invention, however, the sealing surfaces 3, 4 can also be aligned at least approximately parallel to one another, although using an at least approximately wedge-shaped molded seal 5 prevents it from entering the input channel 2, however, the contact surface between the Sealing surfaces 3,4 and this form seal 5 reduced.
Aus der Figur 1 ergibt sich, daß die zumindest annähernd keilförmige Formdichtung 5 den Querschnitt eines diagonal ge- schnittenen Rechteckes hat. Sie ist damit besonders gut an die Dichtflächen 3,4 angepaßt, insbesondere dann, wenn die Dichtfläche 4 des Eingangskanales 2 in etwa senkrecht zur zentralen Achse des Eingangskanales 2 und die Dichtfläche 3 des Luftansaugkanales 1 einen Winkel zu dieser zentralen Achse einnimmt. Bei entsprechender Ausgestaltung der Dichtflächen 3,4 kann beispielsweise aber auch eine keilförmige Formdichtung 5 eingesetzt werden, die zumindest annähernd symmetrisch zu deren Mittelachse ausgebildet ist .It can be seen from FIG. 1 that the at least approximately wedge-shaped molded seal 5 has the cross section of a diagonally cut rectangle. It is therefore particularly well adapted to the sealing surfaces 3, 4, in particular when the sealing surface 4 of the input channel 2 is approximately perpendicular to the central axis of the input channel 2 and the sealing surface 3 of the air intake duct 1 is at an angle to this central one Axis occupies. With a corresponding configuration of the sealing surfaces 3, 4, however, a wedge-shaped molded seal 5 can also be used, for example, which is at least approximately symmetrical to its central axis.
Bei der Montage zur Herstellung der Verbindung zwischen dem Luftanεaugkanal 1 und dem Eingangskanal 3 werden, in einem ersten Montageschritt, Distanzteile 6 aus Kunststoff oder Blech zwischen den äußeren Einlaufkegel 7 des Luftansaugkana- les 1 und den äußeren Verdichterflansch 8 des Eingangskanales 2 eingelegt. Die Distanzteile 6, die den Abstand zwischen dem Luftansaugkanal 1 und dem Eingangskanal 2 definieren, werden hierbei am Umfang des Einlaufkegeis 7 von außen und an den Stirnseiten des Einlaufkegels 7 von innen eingelegt . Über Spannmittel 9, die bevorzugt als Klammerschraubverbindung ausgeführt sind, werden der Luftansaugkanal 1 und der Eingangskanal 2 in einem zweiten Montageschritt zueinander positioniert, so daß der sogenannte Einlaufkegel mit dem Gehäuse des Luftansaugkanal 1 verbunden ist . Das Spannmittel 9 kann hierzu beispielsweise mit einem Ende 10 über ein Drehgelenk am Luftansaugkanal 1 befestigt sein und über ein Klammerelement 11, das mit einer Bohrung 12 für ein mit dem Ende 10 in Verbindung stehendes Gewindeteil 13 ausgeführt ist, an einer Ausnehmung 14 am Eingangskanal 2 bzw. am Flansch des Verdich- ters angreifen. Durch das Betätigen beispielsweise einer am zweiten Ende 15 des Gewindeteiles 13 angreifenden Mutter 16 werden der Luftansaugkanal 1 und der Eingangskanal 2 aufeinander zu und gegen die Distanzteile 6 in eine Endposition verstellt und zueinander positioniert. Hiernach werden vor- zugsweise die jeweiligen Positionen der Muttern 16 am jeweiligen Gewindeteil 13, oder der Abstand zwischen dem Drehgelenk und dem Klammerteil 11, sowie die Position jedes Spannmittels 9 am Eingangskanal 2 und jedes Spannmittels 9 gekennzeichnet. Somit wird sichergestellt, daß der Luftansaugkanal 1 und der Eingangskanal 2 nach dem Losen der Verbindung wieder m die Endposition verstellt werden können.In the assembly for establishing the connection between the air intake duct 1 and the input duct 3, in a first assembly step, spacers 6 made of plastic or sheet metal are inserted between the outer inlet cone 7 of the air intake duct 1 and the outer compressor flange 8 of the input duct 2. The spacers 6, which define the distance between the air intake duct 1 and the inlet duct 2, are inserted from the outside on the circumference of the inlet cone 7 and from the inside at the end faces of the inlet cone 7. In a second assembly step, the air intake duct 1 and the input duct 2 are positioned relative to one another via clamping means 9, which are preferably designed as a clamp screw connection, so that the so-called inlet cone is connected to the housing of the air intake duct 1. For this purpose, the clamping means 9 can be fastened, for example, with an end 10 to the air intake duct 1 via a swivel joint, and to a recess 14 on the inlet duct 2 via a clamp element 11, which is designed with a bore 12 for a threaded part 13 connected to the end 10 or grip the flange of the compressor. By actuating, for example, a nut 16 engaging the second end 15 of the threaded part 13, the air intake duct 1 and the inlet duct 2 are adjusted towards one another and against the spacer parts 6 and are positioned in relation to one another. According to this, the respective positions of the nuts 16 on the respective threaded part 13, or the distance between the swivel joint and the clamp part 11, and the position of each clamping means 9 on the input channel 2 and each clamping means 9 are preferably identified. This ensures that the air intake duct 1 and the input channel 2 can be adjusted again after the connection has been disconnected.
Im weiteren Montageschritt werden dann die Spannelemente 9 gelost, die Distanzteile 6 entfernt und die keilförmigeIn the further assembly step, the clamping elements 9 are then released, the spacers 6 removed and the wedge-shaped
Formdichtung 5 den Dichtflachen 3,4 zugeordnet. Die keilförmige Formdichtung 5 kann hierbei als emstuckiges Teil oder aber auch als Band ausgeführt sein. Ist die keilförmige Formdichtung 5 als Band ausgeführt, so ist sie auf die erfor- derliche Lange zu schneiden und die Schnittkanten sind miteinander zu verkleben. Hiernach können zum Abschluß der Montage der Luftansaugkanal 1 und der Eingangskanal 2 unter Verwendung der Spannmittel 9, bei entsprechender Zuordnung am Eingangskanal 2, und Betatigen der Muttern 16, m die Endpo- sition verbracht werden.Form seal 5 assigned to the sealing surfaces 3.4. The wedge-shaped molded seal 5 can be designed as an integral part or as a band. If the wedge-shaped molded seal 5 is designed as a band, it must be cut to the required length and the cut edges must be glued together. Thereafter, at the end of the assembly, the air intake duct 1 and the input duct 2 can be moved to the end position using the tensioning means 9, with a corresponding assignment on the input duct 2, and by activating the nuts 16, m.
Besonders vorteilhaft wird aber m einem weiteren Montageschritt ein Spannband 17 der den Dichtflachen 18,19 der zumindest annähernd keilförmigen Formdichtung 5 benachbarten, d.h. der weiteren, dem Keilwmkel ß gegenüberliegenden, äußeren Flache 20 dieser Formdichtung 5 entlang ihres Umfanges zugeordnet. Insbesondere aus der Figur 2 ergibt sich, daß das Spannband 17 zumindest eine, im Ausfuhrungsbeispiel zwei, Spannstellen 21, 22 aufweist, durch deren Betätigung das Spannband 17 verkürzt und somit diese keilförmige Formdichtung 5 zwischen die Dichtflachen 3,4 gedruckt werden kann. Hierbei sollte aber durch das Spannband 17 vorerst nur sichergestellt werden, daß diese keilförmige Formdichtung 5 beim Verspannen des Luftansaugkanales 1 mit dem Eingangskanal 2 durch die Spannmittel 9 ihre Position beibehält und nicht aus der von den Dichtflachen 3,4 gebildeten Nut herausgedruckt wird. Um zu verhindern, daß das Spannband 17 selbst beim Verspannen verkippt, können Stutzlaschen 23 vorgesehen werden, die sich beispielsweise am Luftansaugkanal 1 abstut- zen und auf der weiteren Flache 20 dieser keilförmigen Formdichtung 5 aufliegen. Das Spannband 17 wird dann außen auf die Stützlaschen 23 aufgelegt.Particularly advantageously, however, in a further assembly step, a tensioning band 17 is assigned to the sealing surfaces 18, 19 of the at least approximately wedge-shaped molded seal 5, ie the further outer surface 20 opposite the wedge angle β, of this molded seal 5 along its circumference. From FIG. 2 in particular it follows that the tensioning band 17 has at least one, in the exemplary embodiment two, tensioning points 21, 22, by actuating which the tensioning band 17 shortens and thus this wedge-shaped molded seal 5 can be printed between the sealing surfaces 3, 4. Here, however, it should initially only be ensured by the tightening strap 17 that this wedge-shaped molded seal 5 maintains its position when the air intake duct 1 is clamped to the inlet duct 2 by the clamping means 9 and is not pressed out of the groove formed by the sealing surfaces 3, 4. In order to prevent the tensioning strap 17 from tilting even during tensioning, support tabs 23 can be provided which are supported, for example, on the air intake duct 1 and wedge-shaped on the further surface 20 thereof Form seal 5 rest. The strap 17 is then placed on the outside of the support tabs 23.
Hiernach erfolgt dann - wie bereits erläutert - die Endmon- tage, indem durch Positionieren und Spannen der Spannmittel 9 die Zuordnung von Luftansaugkanal 1 und Eingangskanal 2 in die Endposition erfolgt. Nach erfolgter Endmontage kann es gegebenenfalls erforderlich sein, die Spannstellen 21, 22 nachzuziehen, damit sich das Spannband 17 in einer engen Ver- bindung um diese keilförmige Formdichtung 5 legt.The final assembly then takes place, as already explained, in that the air intake duct 1 and the input duct 2 are assigned to the end position by positioning and tensioning the clamping means 9. After the final assembly has been carried out, it may be necessary to retighten the tensioning points 21, 22 so that the tensioning band 17 is placed in a close connection around this wedge-shaped molded seal 5.
Es hat sich als besonders vorteilhaft erwiesen, wenn die Stützlaschen 23 um jeweils 30° zueinander versetzt am Umfang der Kanäle 1,2 angeordnet sind und wenigstens vier gleichmä- ßig ebenfalls am Umfang versetzt angeordnete Spannmittel 9It has proven to be particularly advantageous if the support tabs 23 are arranged offset by 30 ° from one another on the circumference of the channels 1, 2 and at least four tensioning means 9 which are also offset equally on the circumference
Verwendung finden. Um ein unbeabsichtigtes Lösen der verwendeten Schraubverbindungen zu vermeiden können entweder selbstsichernde Schraubelemente oder Sicherungsbleche Anwendung finden.Find use. In order to avoid unintentional loosening of the screw connections used, either self-locking screw elements or locking plates can be used.
Es ist selbstverständlich, daß die Spannelemente 9 auch eine feste Verbindung am Eingangskanal 2 haben können und die Klammerteile 11 dann am Luftansaugkanal 1 angreifen können. It goes without saying that the tensioning elements 9 can also have a fixed connection on the inlet duct 2 and the clamp parts 11 can then engage the air intake duct 1.

Claims

Patentansprüche claims
1. Verbindung zwischen einem Luftansaugkanal (1) eines Luft- ansaugsystemes und einem Eingangskanal (2) eines Gasturbinen- kompressors, wobei die Dichtfläche (3) des Luftansaugkanales (1) und die Dichtfläche (4) des Eingangskanales (2) über eine zumindest annähernd keilförmige Formdichtung (5) miteinander in Verbindung stehen.1. Connection between an air intake duct (1) of an air intake system and an input duct (2) of a gas turbine compressor, the sealing surface (3) of the air intake duct (1) and the sealing surface (4) of the input duct (2) via at least approximately wedge-shaped molded seal (5) are connected.
2. Verbindung nach Anspruch 1, wobei die Dichtfläche (3) des Luftansaugkanales (1) und die Dichtfläche (4) des Eingangskanales (2) einen Winkel zueinander einnehmen, wobei zwei Flächen (18,19) der zumindest annähernd keilförmigen Formdichtung (5) einen Keilwinkel ß zueinander einnehmen, und wobei der Winkel α ungefähr gleich dem Keilwinkel ß ist.2. Connection according to claim 1, wherein the sealing surface (3) of the air intake duct (1) and the sealing surface (4) of the inlet duct (2) are at an angle to one another, two surfaces (18, 19) of the at least approximately wedge-shaped molded seal (5). take a wedge angle ß to each other, and wherein the angle α is approximately equal to the wedge angle ß.
3. Verbindung nach Anspruch 2, wobei der Keilwinkel ß um (5 +/-4)° größer als der Winkel α ist.3. Connection according to claim 2, wherein the wedge angle ß by (5 +/- 4) ° is greater than the angle α.
4. Verbindung nach einem der Ansprüche 1 bis 3, wobei an einer weiteren Fläche (20) der zumindest annähernd keilförmigen Formdichtung (5) ein Spannband (17) angreift.4. Connection according to one of claims 1 to 3, wherein on a further surface (20) of the at least approximately wedge-shaped molded seal (5) engages a tension band (17).
5. Verbindung nach einem der Ansprüche 1 bis 4, wobei an der weiteren Fläche (20) der zumindest annähernd keilförmigen5. Connection according to one of claims 1 to 4, wherein on the further surface (20) of the at least approximately wedge-shaped
Formdichtung (5) Stützlaschen (23) angreifen.Grip the molded seal (5) on the support tabs (23).
6. Verbindung nach einem der Ansprüche 1 bis 5, wobei der Luftansaugkanal (1) und der Eingangskanal (2) über Spannmit- tel (9) miteinander in Verbindung bringbar sind.6. Connection according to one of claims 1 to 5, wherein the air intake duct (1) and the input duct (2) can be connected to one another via clamping means (9).
7. Verbindung nach Anspruch 6, wobei die Spannmittel (9) als Klammerschraubverbindung ausgeführt sind. 7. Connection according to claim 6, wherein the clamping means (9) are designed as a clamp screw connection.
8. Verfahren zum Herstellen einer Verbindung zwischen einem8. A method of connecting a
Luftansaugkanal (1) eines Luftansaugsystemes und einem Eingangskanal (2) eines Gasturbinenkompressors, wobei eine zumindest annähernd keilförmige Formdichtung (5) zwischen die Dichtfläche (3) des Luftansaugkanales (1) und die Dichtfläche (4) des Eingangskanales (2) gebracht wird, und wobei die Dichtflächen (3,4) über ein Spannmittel (9) an die zumindest annähernd keilförmige Formdichtung (5) gedrückt werden.Air intake duct (1) of an air intake system and an input duct (2) of a gas turbine compressor, an at least approximately wedge-shaped molded seal (5) being brought between the sealing surface (3) of the air intake duct (1) and the sealing surface (4) of the input duct (2), and wherein the sealing surfaces (3, 4) are pressed against the at least approximately wedge-shaped molded seal (5) by means of a clamping means (9).
9. Verfahren nach Anspruch 8, wobei ein Spannband (17) um die zumindest annähernd keilförmige Formdichtung (5) gelegt wird.9. The method according to claim 8, wherein a tension band (17) is placed around the at least approximately wedge-shaped molded seal (5).
10. Verfahren nach Anspruch 8 oder 9, wobei an der zumindest annähernd keilförmigen Formdichtung (5) Stützlaschen (23) an- greifen. 10. The method according to claim 8 or 9, wherein support tabs (23) engage on the at least approximately wedge-shaped molded seal (5).
PCT/DE1998/000671 1997-03-19 1998-03-06 Suction duct connection in a gas turbine WO1998041736A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997111526 DE19711526C1 (en) 1997-03-19 1997-03-19 Gas-turbine intake air duct connection
DE19711526.8 1997-03-19

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WO1998041736A1 true WO1998041736A1 (en) 1998-09-24

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Citations (8)

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US3971566A (en) * 1972-03-29 1976-07-27 Raychem Corporation Hydraulic sealing member and process
US4336943A (en) * 1980-11-14 1982-06-29 United Technologies Corporation Wedge-shaped seal for flanged joints
US4361335A (en) * 1980-05-06 1982-11-30 Nuovo Pignone S.P.A. Annular gasket for static sealing for very high temperatures and small pressure drops, and method of making
US4477086A (en) * 1982-11-01 1984-10-16 United Technologies Corporation Seal ring with slidable inner element bridging circumferential gap
FR2596115A1 (en) * 1986-03-21 1987-09-25 Rolls Royce Improvement to retention means
US5433370A (en) * 1993-01-14 1995-07-18 Eg&G Pressure Science, Inc. Multi-ply sealing rings and methods for manufacturing same
US5435576A (en) * 1992-12-28 1995-07-25 Rode; John E. Spring gasket
US5505498A (en) * 1994-05-16 1996-04-09 Eg&G Pressure Science, Inc. Flexible pressure-energized joint

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19542081A1 (en) * 1995-11-11 1997-05-15 Mtu Muenchen Gmbh Seal for gap between flat side wall and two pivotably connected flaps

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3971566A (en) * 1972-03-29 1976-07-27 Raychem Corporation Hydraulic sealing member and process
US4361335A (en) * 1980-05-06 1982-11-30 Nuovo Pignone S.P.A. Annular gasket for static sealing for very high temperatures and small pressure drops, and method of making
US4336943A (en) * 1980-11-14 1982-06-29 United Technologies Corporation Wedge-shaped seal for flanged joints
US4477086A (en) * 1982-11-01 1984-10-16 United Technologies Corporation Seal ring with slidable inner element bridging circumferential gap
FR2596115A1 (en) * 1986-03-21 1987-09-25 Rolls Royce Improvement to retention means
US5435576A (en) * 1992-12-28 1995-07-25 Rode; John E. Spring gasket
US5433370A (en) * 1993-01-14 1995-07-18 Eg&G Pressure Science, Inc. Multi-ply sealing rings and methods for manufacturing same
US5505498A (en) * 1994-05-16 1996-04-09 Eg&G Pressure Science, Inc. Flexible pressure-energized joint

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