EP1961921A1 - Seal for a turbo engine - Google Patents

Seal for a turbo engine Download PDF

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Publication number
EP1961921A1
EP1961921A1 EP07003920A EP07003920A EP1961921A1 EP 1961921 A1 EP1961921 A1 EP 1961921A1 EP 07003920 A EP07003920 A EP 07003920A EP 07003920 A EP07003920 A EP 07003920A EP 1961921 A1 EP1961921 A1 EP 1961921A1
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EP
European Patent Office
Prior art keywords
steam
sealing
seal
vapor
turbomachine
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP07003920A
Other languages
German (de)
French (fr)
Inventor
Edwin Gobrecht
Achim Hammann
Dirk Knudsen
Bernd Leu
Karsten Peters
Jan Dr. Walkenhorst
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Priority to EP07003920A priority Critical patent/EP1961921A1/en
Publication of EP1961921A1 publication Critical patent/EP1961921A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
    • F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/70—Application in combination with
    • F05D2220/72—Application in combination with a steam turbine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/50—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/55—Seals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/60—Shafts
    • F05D2240/63—Glands for admission or removal of fluids from shafts

Definitions

  • the invention relates to a turbomachine, comprising a housing and a rotatably mounted within the housing shaft, further comprising a live steam inlet channel and at least one acted upon with sealing steam seal.
  • turbomachinery Hydraulic turbines, steam and gas turbines, wind turbines, centrifugal pumps and centrifugal compressors as well as propellers are summarized under the collective term turbomachinery. All these machines have in common that they serve the purpose of extracting energy from one fluid in order to drive another machine or, conversely, to supply energy to a fluid in order to increase its pressure.
  • fluid means liquids or gases that can perform flowing movements.
  • a turbine as an embodiment of a turbomachine must form a system sealed off from the atmosphere in order to operate optimally.
  • the rotatable components such.
  • B. a shaft and lying opposite the rotatable components fixed components such.
  • As a turbine housing shaft seals used. These shaft seals serve to ensure that the flow medium in the turbine does not flow out into the atmosphere and, secondly, that the atmospheric air does not penetrate into the turbine.
  • the shaft seals are usually formed with vapor deposition and / or suction chambers.
  • the previously used shaft seals comprise a shaft vapor vapor system and a steam vapor system.
  • the shaft vapor vapor system includes a barrier vapor system consisting of a shaft vapor vapor collector, including a shaft seal steam supply and discharge valve.
  • the Wrasendampfsystem usually includes a Wrasendampfsammler, Wrasendampfabsaugung and Wrasendampfkondensator. In order to achieve a sealing effect, so-called sealing gas is supplied from the sealing steam system.
  • the amount of steam required for this purpose is comparatively large and is usually made available by steam turbine external sealing steam sources.
  • a turbomachine comprising a housing and a rotatably mounted within the housing shaft, further comprising a live steam inlet channel and at least one acted upon with sealing steam seal, wherein a conduit device for fluidic connection of the live steam inlet channel and the seal is present.
  • the invention is based on the idea that it does not appear necessary to provide the required amount of sealing steam for the sealing of sources external of the steam turbine. It is rather the way set to use instead of external sources of steam turbine internal steam turbine sources. For this purpose, it is proposed to form a line device for fluidic connection, which connects the live steam inlet channel and the seal. The invention is therefore based on the idea that part of the live steam can be used to supply the seal with sealing steam.
  • novel shaft seals such.
  • B. brush seals are used on the shaft passages of high, medium and low pressure turbine sections.
  • Such brush seals have multiple sealants in the form of bristles which possibly touch the rotating shaft during operation.
  • the seal is preferably formed with a sealing steam chamber can be acted upon with sealing steam.
  • the line device for the fluidic connection of the live steam inlet channel and the seal is designed in such a way that the pressure of the barrier steam derived from the live steam is constant during operation.
  • the line device comprises at least one line with a diverter and valves.
  • the conduit device is designed such that the sealing vapor is fed into a sealing vapor chamber of the seal.
  • the invention is also based on the idea that previously required external steam supply systems for the sealing steam supply are not needed.
  • the advantage is achieved that external auxiliary steam supplies are saved and the auxiliary steam may possibly be made available to the process otherwise.
  • FIG. 1 is a compact turbine part 1 and a low-pressure turbine part 2 to see.
  • the compact turbine part 1 comprises both a high-pressure part 3 and a medium-pressure part 4.
  • the low-pressure turbine part 2 has a double-flow design.
  • a shaft vapor vapor system 5 can be seen.
  • the shaft-type vapor-vapor system 5 comprises a barrier-vapor system 6 and a vapor-vapor system 7.
  • the barrier-vapor system 6 comprises a barrier-vapor source 8 and a condenser 9.
  • the barrier-vapor source 8 and the condenser 9 are connected to lines 11 via valves 10.
  • the Wrasendampfsystem 7 includes a Wrasendampfkondensator 12, which are connected via lines 13 and valves 14 with seals 15 of the compact turbine section 1 and the low-pressure turbine part 2.
  • the sealing steam system 6 comprises a shaft sealing steam collector including shaft sealing steam supply and discharge valves.
  • the Wrasendampfsystem 7 also includes a Wrasendampfsammler and Wrasendampfabsaugung.
  • the low-pressure turbine part 2 as an embodiment of a turbomachine comprises a housing and a shaft rotatably mounted within the housing.
  • the low-pressure turbine part further comprises a live steam inlet duct 16 and at least one with sealing steam acted upon seal 15.
  • the low-pressure turbine part is characterized in that a conduit device 17 is provided for fluidically connecting the live steam inlet channel 16 and the seal 15.
  • the live steam inlet channel 16 comprises a branch 18, wherein in operation a portion of the live steam at the branch 18 is fed via the line device 17 to the seal 15.
  • the seal 15 has a sealing steam acted upon by sealing steam chamber.
  • the line device 17 is designed in such a way that the pressure of the sealing steam derived from the live steam is constant during operation.
  • the line device 17 in addition to a line on a valve, a diversion device and a controller.

Abstract

The fluid flow engine has a housing and a shaft pivoted within the housing. The fluid flow engine has a main steam-inflow channel (16) and a sealing (15) impinged with sealing steam. A circuit device (17) is available for fluidic connections of the main steam-inflow channel and the sealing. The sealing has a sealing steam chamber filled with sealing steam.

Description

Die Erfindung betrifft eine Strömungsmaschine, umfassend ein Gehäuse und eine innerhalb des Gehäuses drehbar gelagerte Welle, weiter umfassend einen Frischdampf-Einströmkanal und zumindest eine mit Sperrdampf beaufschlagbare Dichtung.The invention relates to a turbomachine, comprising a housing and a rotatably mounted within the housing shaft, further comprising a live steam inlet channel and at least one acted upon with sealing steam seal.

Unter der Sammelbezeichnung Strömungsmaschinen werden Wasserturbinen, Dampf- und Gasturbinen, Windräder, Kreiselpumpen und Kreiselverdichter sowie Propeller zusammengefasst. Allen diesen Maschinen ist gemeinsam, dass sie dem Zweck dienen, einem Fluid Energie zu entziehen, um damit eine andere Maschine anzutreiben oder umgekehrt einem Fluid Energie zuzuführen, um dessen Druck zu erhöhen. Unter dem Begriff Fluid sind Flüssigkeiten oder Gase zu verstehen, die strömende Bewegungen ausführen können.Hydraulic turbines, steam and gas turbines, wind turbines, centrifugal pumps and centrifugal compressors as well as propellers are summarized under the collective term turbomachinery. All these machines have in common that they serve the purpose of extracting energy from one fluid in order to drive another machine or, conversely, to supply energy to a fluid in order to increase its pressure. The term fluid means liquids or gases that can perform flowing movements.

Eine Turbine als Ausführungsform einer Strömungsmaschine muss ein gegen die Atmosphäre abgeschlossenes System bilden, um optimal betrieben werden zu können. In der Regel werden zwischen den rotierbaren Bauteilen, wie z. B. einer Welle und den gegenüber den rotierbaren Bauteilen liegenden feststehenden Bauteilen, wie z. B. einem Turbinengehäuse, Wellendichtungen eingesetzt. Diese Wellendichtungen dienen dazu, dass das in der Turbine befindliche Strömungsmedium nicht in die Atmosphäre ausströmt und andererseits dazu, dass die Atmosphärenluft nicht in die Turbine eindringt.A turbine as an embodiment of a turbomachine must form a system sealed off from the atmosphere in order to operate optimally. In general, between the rotatable components, such. B. a shaft and lying opposite the rotatable components fixed components such. As a turbine housing, shaft seals used. These shaft seals serve to ensure that the flow medium in the turbine does not flow out into the atmosphere and, secondly, that the atmospheric air does not penetrate into the turbine.

Die Wellendichtungen werden üblicherweise mit Bedampfungs- und/oder Absaugkammern ausgebildet. Die bisher eingesetzten Wellendichtungen umfassen ein Wellendichtdampfsystem und ein Wrasendampfsystem. Das Wellendichtdampfsystem umfasst ein Sperrdampfsystem, bestehend aus einem Wellendichtdampfsammler, einschließlich einem Wellendichtdampfzu- und Ableitungsventil. Das Wrasendampfsystem beinhaltet üblicherweise einen Wrasendampfsammler, eine Wrasendampfabsaugung und einen Wrasendampfkondensator. Um eine dichtende Wirkung zu erreichen wird sozusagen der Dichtung Sperrdampf aus dem Sperrdampfsystem zugeführt.The shaft seals are usually formed with vapor deposition and / or suction chambers. The previously used shaft seals comprise a shaft vapor vapor system and a steam vapor system. The shaft vapor vapor system includes a barrier vapor system consisting of a shaft vapor vapor collector, including a shaft seal steam supply and discharge valve. The Wrasendampfsystem usually includes a Wrasendampfsammler, Wrasendampfabsaugung and Wrasendampfkondensator. In order to achieve a sealing effect, so-called sealing gas is supplied from the sealing steam system.

Die dafür benötigte Dampfmenge ist vergleichsweise groß und wird üblicherweise von dampfturbinenexternen Sperrdampfquellen zur Verfügung gestellt.The amount of steam required for this purpose is comparatively large and is usually made available by steam turbine external sealing steam sources.

Es ist Aufgabe der Erfindung eine Strömungsmaschine bereitzustellen, die sich durch eine verbesserte Verfügbarkeit auszeichnet.It is an object of the invention to provide a turbomachine, which is characterized by improved availability.

Gelöst wird diese Aufgabe durch eine Strömungsmaschine, umfassend ein Gehäuse und eine innerhalb des Gehäuses drehbar gelagerte Welle, weiter umfassend einen Frischdampf-Einströmkanal und zumindest eine mit Sperrdampf beaufschlagbare Dichtung, wobei eine Leitungsvorrichtung zum strömungstechnischen Verbinden des Frischdampf-Einströmkanals und der Dichtung vorhanden ist.This object is achieved by a turbomachine, comprising a housing and a rotatably mounted within the housing shaft, further comprising a live steam inlet channel and at least one acted upon with sealing steam seal, wherein a conduit device for fluidic connection of the live steam inlet channel and the seal is present.

Die Erfindung geht von dem Gedanken aus, dass es nicht nötig erscheint, die benötigte Sperrdampfmenge für die Dichtung von dampfturbinenexternen Quellen zur Verfügung zu stellen. Es wird vielmehr der Weg eingeschlagen, statt dampfturbinenexternen Quellen dampfturbineninterne Quellen zu verwenden. Hierzu wird vorgeschlagen, eine Leitungsvorrichtung zum strömungstechnischen Verbinden auszubilden, die den Frischdampf-Einströmkanal und die Dichtung verbindet. Die Erfindung geht somit von dem Gedanken aus, dass ein Teil des Frischdampfes zur Versorgung der Dichtung mit Sperrdampf verwendet werden kann.The invention is based on the idea that it does not appear necessary to provide the required amount of sealing steam for the sealing of sources external of the steam turbine. It is rather the way set to use instead of external sources of steam turbine internal steam turbine sources. For this purpose, it is proposed to form a line device for fluidic connection, which connects the live steam inlet channel and the seal. The invention is therefore based on the idea that part of the live steam can be used to supply the seal with sealing steam.

Dies ist besonders dann möglich, wenn neuartige Wellendichtungen, wie z. B. Bürstendichtungen an den Wellendurchführungen von Hoch-, Mittel- und Niederdruck-Teilturbinen verwendet werden. Solche Bürstendichtungen weisen mehrere Dichtmittel in Form von Borsten auf, die im Betrieb möglicherweise die drehende Welle berühren. Durch diese neuartigen Wellendichtungen wird eine geringere Menge an Sperrdampf benötigt oder anders ausgedrückt, durch die Dichtung strömt ein geringerer Leckmassenstrom, wodurch eine geringere Menge an Sperrdampf benötigt wird.This is especially possible if novel shaft seals, such. B. brush seals are used on the shaft passages of high, medium and low pressure turbine sections. Such brush seals have multiple sealants in the form of bristles which possibly touch the rotating shaft during operation. By this novel shaft seals a smaller amount of sealing steam is required or in other words, through the seal flows a lower leakage mass flow, whereby a smaller amount of sealing steam is needed.

Dadurch ist die Dichtung bevorzugterweise mit einer mit Sperrdampf beaufschlagbaren Sperrdampfkammer ausgebildet.As a result, the seal is preferably formed with a sealing steam chamber can be acted upon with sealing steam.

In einer vorteilhaften Weiterführung ist die Leitungsvorrichtung zum strömungstechnischen Verbinden des Frischdampf-Einströmkanals und der Dichtung derart ausgebildet, dass im Betrieb der Druck des vom Frischdampf abgeleiteten Sperrdampfes konstant ist. Dafür umfasst die Leitungsvorrichtung zumindest eine Leitung mit einer Umleiteinrichtung und Ventilen.In an advantageous continuation, the line device for the fluidic connection of the live steam inlet channel and the seal is designed in such a way that the pressure of the barrier steam derived from the live steam is constant during operation. For this purpose, the line device comprises at least one line with a diverter and valves.

Dadurch wird eine konstante Menge an Sperrdampf der Wellendichtung zugeführt.As a result, a constant amount of sealing steam is supplied to the shaft seal.

Bevorzugterweise ist die Leitungsvorrichtung derart ausgebildet, dass der Sperrdampf in eine Sperrdampfkammer der Dichtung zugeführt wird.Preferably, the conduit device is designed such that the sealing vapor is fed into a sealing vapor chamber of the seal.

Die Erfindung geht außerdem von dem Gedanken aus, dass bisher benötigte externe Dampfversorgungssysteme für die Sperrdampfversorgung nicht benötigt werden. Außerdem wird der Vorteil erzielt, dass externe Hilfsdampfversorgungen eingespart werden und der Hilfsdampf möglicherweise dem Prozess anderweitig zur Verfügung gestellt werden kann.The invention is also based on the idea that previously required external steam supply systems for the sealing steam supply are not needed. In addition, the advantage is achieved that external auxiliary steam supplies are saved and the auxiliary steam may possibly be made available to the process otherwise.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen und der folgenden Figurenbeschreibung offenbart.Further advantageous embodiments of the invention are disclosed in the subclaims and the following description of the figures.

Es zeigen:

Figur 1
ein Sperrdampfversorgungssystem für die Dichtungen einer Dampfturbinenanlage gemäß dem Stand der Technik,
Figur 2
ein Sperrdampfversorgungssystem gemäß der Erfindung.
Show it:
FIG. 1
a sealing steam supply system for the seals of a steam turbine plant according to the prior art,
FIG. 2
a sealing steam supply system according to the invention.

In der Figur 1 ist eine Kompakt-Teilturbine 1 und eine Niederdruck-Teilturbine 2 zu sehen. Die Kompakt-Teilturbine 1 umfasst sowohl einen Hochdruckteil 3 als auch einen Mitteldruckteil 4. Die Niederdruck-Teilturbine 2 ist zweiflutig ausgebildet. Des Weiteren ist ein Wellendichtdampfsystem 5 zu sehen. Das Wellendichtdampfsystem 5 umfasst ein Sperrdampfsystem 6 und ein Wrasendampfsystem 7. Das Sperrdampfsystem 6 umfasst eine Sperrdampfquelle 8 und einen Kondensator 9. Die Sperrdampfquelle 8 und der Kondensator 9 sind über Ventile 10 mit Leitungen 11 verbunden.In the FIG. 1 is a compact turbine part 1 and a low-pressure turbine part 2 to see. The compact turbine part 1 comprises both a high-pressure part 3 and a medium-pressure part 4. The low-pressure turbine part 2 has a double-flow design. Furthermore, a shaft vapor vapor system 5 can be seen. The shaft-type vapor-vapor system 5 comprises a barrier-vapor system 6 and a vapor-vapor system 7. The barrier-vapor system 6 comprises a barrier-vapor source 8 and a condenser 9. The barrier-vapor source 8 and the condenser 9 are connected to lines 11 via valves 10.

Das Wrasendampfsystem 7 umfasst einen Wrasendampfkondensator 12, der über Leitungen 13 und Ventilen 14 mit Dichtungen 15 der Kompakt-Teilturbine 1 und der Niederdruck-Teilturbine 2 verbunden sind.The Wrasendampfsystem 7 includes a Wrasendampfkondensator 12, which are connected via lines 13 and valves 14 with seals 15 of the compact turbine section 1 and the low-pressure turbine part 2.

Des Weiteren umfasst das Sperrdampfsystem 6 einen Wellendichtdampfsammler einschließlich Wellendichtdampfzu- und -ableitungsventilen. Das Wrasendampfsystem 7 beinhaltet außerdem einen Wrasendampfsammler und eine Wrasendampfabsaugung.Furthermore, the sealing steam system 6 comprises a shaft sealing steam collector including shaft sealing steam supply and discharge valves. The Wrasendampfsystem 7 also includes a Wrasendampfsammler and Wrasendampfabsaugung.

In der Figur 2 ist eine erfindungsgemäße Anordnung der Kompakt-Teilturbine 1 und der Niederdruck-Teilturbine 2 mit dem Wellendichtdampfsystem 5 zu sehen. Die Niederdruck-Teilturbine 2 als Ausführungsform einer Strömungsmaschine umfasst ein Gehäuse und eine innerhalb des Gehäuses drehbar gelagerte Welle. Die Niederdruck-Teilturbine umfasst weiter einen Frischdampf-Einströmkanal 16 und zumindest eine mit Sperrdampf beaufschlagbare Dichtung 15. Die Niederdruck-Teilturbine zeichnet sich dadurch aus, dass eine Leitungsvorrichtung 17 zum strömungstechnischen Verbinden der des Frischdampf-Einströmkanals 16 und der Dichtung 15 vorgesehen ist. Dafür umfasst der Frischdampf-Einströmkanal 16 eine Abzweigung 18 auf, wobei im Betrieb ein Teil des Frischdampfes an der Abzweigung 18 über die Leitungsvorrichtung 17 zur Dichtung 15 zugeführt wird.In the FIG. 2 an arrangement according to the invention of the compact turbine part 1 and the low-pressure turbine part 2 with the shaft sealing vapor system 5 can be seen. The low-pressure turbine part 2 as an embodiment of a turbomachine comprises a housing and a shaft rotatably mounted within the housing. The low-pressure turbine part further comprises a live steam inlet duct 16 and at least one with sealing steam acted upon seal 15. The low-pressure turbine part is characterized in that a conduit device 17 is provided for fluidically connecting the live steam inlet channel 16 and the seal 15. For this, the live steam inlet channel 16 comprises a branch 18, wherein in operation a portion of the live steam at the branch 18 is fed via the line device 17 to the seal 15.

Die Dichtung 15 weist eine mit Sperrdampf beaufschlagbare Sperrdampfkammer auf.The seal 15 has a sealing steam acted upon by sealing steam chamber.

Die Leitungsvorrichtung 17 ist dabei derart ausgebildet, dass im Betrieb der Druck des vom Frischdampf abgeleiteten Sperrdampfs konstant ist.In this case, the line device 17 is designed in such a way that the pressure of the sealing steam derived from the live steam is constant during operation.

Dazu weist die Leitungsvorrichtung 17 neben einer Leitung ein Ventil, eine Umleitungseinrichtung und eine Steuerung auf.For this purpose, the line device 17 in addition to a line on a valve, a diversion device and a controller.

Claims (5)

Strömungsmaschine (1, 2),
umfassend ein Gehäuse und eine innerhalb des Gehäuses drehbar gelagerte Welle,
weiter umfassend einen Frischdampf-Einströmkanal (16) und zumindest eine mit Sperrdampf beaufschlagbare Dichtung (15),
dadurch gekennzeichnet, dass
eine Leitungsvorrichtung (17) zum strömungstechnischen Verbinden des Frischdampf-Einströmkanals (16) und der Dichtung (15) vorhanden ist.Turbomachine (1, 2),
comprising a housing and a shaft rotatably mounted within the housing,
further comprising a live steam inlet channel (16) and at least one sealable with sealing steam seal (15),
characterized in that
a conduit device (17) for the fluidic connection of the live steam inflow channel (16) and the seal (15) is present. Strömungsmaschine (1, 2) nach Anspruch 1,
wobei die Dichtung (15) eine mit Sperrdampf beaufschlagbare Sperrdampfkammer aufweist.Turbomachine (1, 2) according to claim 1,
wherein the seal (15) has a sealing steam chamber can be acted upon with sealing steam. Strömungsmaschine (1, 2) nach Anspruch 1 oder 2,
wobei die Leitungsvorrichtung (17) derart ausgebildet ist, dass im Betrieb ein Teil des Frischdampfs der Dichtung (15) als Sperrdampf zugeführt wird.Turbomachine (1, 2) according to claim 1 or 2,
wherein the conduit device (17) is designed such that during operation, a portion of the live steam of the seal (15) is supplied as a sealing vapor. Strömungsmaschine (1, 2) nach einem der vorhergehenden Ansprüche,
wobei die Leitungsvorrichtung (17) derart ausgebildet ist, dass im Betrieb der Druck des vom Frischdampf abgeleiteten Sperrdampfes konstant ist.Turbomachine (1, 2) according to one of the preceding claims,
wherein the conduit device (17) is designed such that during operation the pressure of the sealing steam derived from the live steam is constant. Strömungsmaschine (1, 2) nach einem der vorhergehenden Ansprüche,
wobei die Leitungsvorrichtung (17) derart ausgebildet ist, dass der Sperrdampf in eine Sperrdampfkammer der Dichtung (15) zuführbar ist.Turbomachine (1, 2) according to one of the preceding claims,
wherein the conduit device (17) is designed such that the sealing steam can be fed into a sealing vapor chamber of the seal (15).
EP07003920A 2007-02-26 2007-02-26 Seal for a turbo engine Withdrawn EP1961921A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2420650A3 (en) * 2009-05-05 2012-03-21 General Electric Company Steam turbine, system, and method of operation

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CH245781A (en) * 1945-05-25 1946-11-30 Escher Wyss Maschf Ag Sealing device on steam turbines with at least two labyrinth seals that seal against different pressures.
DE1105431B (en) * 1959-04-22 1961-04-27 Sulzer Ag Device for the delivery of sealing steam for sealing points in steam power plants, especially steam turbine plants
DE2253839A1 (en) * 1972-10-11 1974-04-18 Bbc Brown Boveri & Cie BARRIER MEDIUM LABYRINTH SEAL
DE2841631A1 (en) * 1978-08-31 1980-03-06 Bbc Brown Boveri & Cie BLOCK STEAM SYSTEM AND USE THEREOF
US4793141A (en) * 1986-11-14 1988-12-27 Hitachi, Ltd. Gland sealing steam supply system for steam turbines
DE4313805A1 (en) * 1993-04-27 1994-11-03 Siemens Ag Sealing arrangement for at least one passage of a shaft through a housing
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