EP2173973B1 - Steam supply for a steam turbine - Google Patents

Steam supply for a steam turbine Download PDF

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Publication number
EP2173973B1
EP2173973B1 EP08775350A EP08775350A EP2173973B1 EP 2173973 B1 EP2173973 B1 EP 2173973B1 EP 08775350 A EP08775350 A EP 08775350A EP 08775350 A EP08775350 A EP 08775350A EP 2173973 B1 EP2173973 B1 EP 2173973B1
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EP
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Prior art keywords
pipe
steam
inner pipe
outer pipe
steam feed
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Not-in-force
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EP08775350A
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German (de)
French (fr)
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EP2173973A1 (en
Inventor
Kai Wieghardt
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Siemens AG
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Siemens AG
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    • 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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/26—Double casings; Measures against temperature strain in casings

Definitions

  • Turbomachines such as steam turbines, are operated with a flow medium.
  • water vapor is used as the flow medium, which may have a temperature of over 600 ° C at a pressure of about 300 bar (30,000 kPa).
  • Such high temperatures and pressures make increased demands on the materials of the steam turbine.
  • the area of the steam inflow is subjected to high thermal and mechanical loads.
  • the object of the invention is to provide a steam supply which is suitable for high temperatures.
  • the expanded steam is usually brought in a reheater to a pressure of about 350 bar (35000 kPa) and as Reheater steam called.
  • This reheated steam can also be used as a cooling medium.
  • the outer pipe is connected to one another at a second location with the inner pipe.
  • the first component 23 comprises a first inner pipe 26. Furthermore, the first component 23 has a first outer pipe 27.
  • the second component 24 has a second inner pipe 28 and a second outer pipe 29. Between the first inner pipe 26 and the second inner pipe 28, an I-ring seal 30 can be arranged. Such an I-ring seal 30 may also be between the first outer pipe 27 and the second outer pipe 29 are arranged.

Abstract

The steam supply unit (11) has an outer pipeline (14) arranged around an inner pipeline (12), where a coolant inlet opening (17) is provided for supplying a coolant i.e. live stream, between the inner pipeline and the outer pipeline. Two components (23, 24) exhibit respective inner pipelines (26, 28) and respective outer pipelines (27, 29), where the outer pipeline (14) is formed from the outer pipelines (27, 29) and the inner pipeline (12) is formed from the inner pipelines (26, 28). The inner pipeline (12) and the outer pipeline (14) are formed in a material single-piece manner.

Description

Die Erfindung betrifft eine Dampfzuführung für eine ein Innengehäuse und ein Außengehäuse umfassende Strömungsmaschine, insbesondere Dampfturbine, umfassend: eine erste Innenrohrleitung zum Führen von Strömungsmedium, wobei die Innenrohrleitung zum Anlegen an eine Innengehäuse-Einströmöffnung des Innengehäuses ausgebildet ist, eine um die Innenrohrleitung angeordnete Außenrohrleitung, wobei die Dampfzuführung zum Anlegen an eine Außengehäuse-Einströmöffnung der Strömungsmaschine ausgebildet ist. US 2 800 299 offenbart eine Dampfzuführung nach dem Oberbegriff vom Anspruch 1.The invention relates to a steam feed for a turbomachine comprising an inner casing and an outer casing, in particular a steam turbine, comprising: a first inner pipe for guiding flow medium, wherein the inner pipe is designed for application to an inner casing inlet opening of the inner casing, an outer pipe arranged around the inner pipe, wherein the steam supply is designed for application to an outer housing inflow opening of the turbomachine. US 2,800,299 discloses a steam supply according to the preamble of claim 1.

Strömungsmaschinen, wie zum Beispiel Dampfturbinen, werden mit einem Strömungsmedium betrieben. In Dampfturbinen wird Wasserdampf als Strömungsmedium verwendet, der eine Temperatur von über 600°C bei einem Druck von über 300 bar (30000 kPa) aufweisen kann. Solch hohe Temperaturen und Drücke stellen erhöhte Anforderungen an die Materialen der Dampfturbine. Insbesondere wird der Bereich der Dampfeinströmung thermisch und mechanisch hoch belastet.Turbomachines, such as steam turbines, are operated with a flow medium. In steam turbines water vapor is used as the flow medium, which may have a temperature of over 600 ° C at a pressure of about 300 bar (30,000 kPa). Such high temperatures and pressures make increased demands on the materials of the steam turbine. In particular, the area of the steam inflow is subjected to high thermal and mechanical loads.

Eine Dampfturbine als Ausführungsform einer Strömungsmaschine weist für den Einsatz von in die Dampfturbine einströmendem stark erhitzten Frischdampf üblicherweise ein Innengehäuse, ein um das Innengehäuse angeordnetes Außengehäuse und einen innerhalb des Innengehäuses drehbar gelagerten Rotor auf. Der Frischdampf strömt über so genannte Einströmstutzen durch das Außengehäuse und das Innengehäuse in den Strömungskanal hinein. Der Bereich um diese Einströmstutzen wird daher thermisch hoch belastet. Durch geeignete Dampfzuführungsleitungen wird der heiße Wasserdampf möglichst vom Außengehäuse thermisch entkoppelt.A steam turbine as an embodiment of a turbomachine usually has an inner housing, an outer housing arranged around the inner housing and a rotor rotatably mounted within the inner housing for the use of highly heated live steam flowing into the steam turbine. The live steam flows through so-called inflow through the outer housing and the inner housing into the flow channel. The area around these inflow is therefore subjected to high thermal loads. By suitable steam supply lines, the hot steam is thermally decoupled from the outer casing as possible.

Aufgabe der Erfindung ist es, eine Dampfzuführung anzugeben, die für hohe Temperaturen geeignet ist.The object of the invention is to provide a steam supply which is suitable for high temperatures.

Gelöst wird diese Aufgabe durch die Merkmale des Anspruchs 1. Weitere vorteilhafte Weiterbildungen sind in den Unteransprüchen angegeben.This object is achieved by the features of claim 1. Further advantageous developments are specified in the dependent claims.

Die Erfindung geht unter anderem von dem Aspekt aus, dass es von Vorteil ist, wenn eine Dampfzuführung zwei Rohrleitungen aufweist, die koaxial übereinander angeordnet sind, wobei durch die innere Rohrleitung der Frischdampf strömt und um die innere Rohrleitung ein Kühlmedium strömt.The invention is based inter alia on the aspect that it is advantageous if a steam supply has two pipes which are arranged coaxially one above the other, wherein the live steam flows through the inner pipe and a cooling medium flows around the inner pipe.

Die Erfindung zeigt unter anderem den Vorteil, dass die Dampfzuführungsleitung derart ausgebildet ist, dass um eine innere Innenrohrleitung eine Außenrohrleitung angeordnet ist. Zwischen der Außenrohrleitung und der Innenrohrleitung bildet sich ein Spalt aus, in dem ein Kühlmedium strömbar ist. Dieses Kühlmedium bewirkt eine Kühlung der Außenrohrleitung. Die Außenrohrleitung kann nun direkt an eine Dampfturbine angekoppelt werden, wobei die Dampfturbine geringer thermisch belastet wird. Somit kann Frischdampf mit hoher Temperatur verwendet werden.The invention has, inter alia, the advantage that the steam supply line is designed such that an outer pipe is arranged around an inner inner pipe. Between the outer pipe and the inner pipe, a gap is formed, in which a cooling medium can be flowed. This cooling medium causes cooling of the outer pipe. The outer pipe can now be coupled directly to a steam turbine, the steam turbine is less thermally stressed. Thus, live steam at high temperature can be used.

Das Kühlmedium wird über eine Kühlmedium-Zuströmungsöffnung in den Raum zwischen der Außenrohrleitung und der Innenrohrleitung eingeströmt. Das Kühlmedium kann hierbei ein externes Kühlmedium sein oder aus der Dampfturbine stammen. Beispielsweise kann als Kühlmedium, der nach dem Strömungskanal ausströmende Dampf verwendet werden. In bekannten Dampfturbinen wird Frischdampf mit einer Temperatur von ca. 620°C und einem Druck von ca. 350 bar (35000 kPa) in die Dampfturbine eingeströmt und im Strömungskanal entspannt, wobei die thermische Energie des Dampfes in mechanische Energie umgewandelt wird und eine Rotation des Rotors hervorruft. Nach dem Strömungskanal kann der entspannte Dampf eine Temperatur von 500°C aufweisen und als Kühlmedium verwendet werden.The cooling medium is flowed into the space between the outer pipe and the inner pipe via a cooling medium inflow opening. The cooling medium may in this case be an external cooling medium or originate from the steam turbine. For example, can be used as the cooling medium, the effluent after the flow channel steam. In known steam turbines live steam at a temperature of about 620 ° C and a pressure of about 350 bar (35000 kPa) is flowed into the steam turbine and expanded in the flow channel, the thermal energy of the steam is converted into mechanical energy and a rotation of the Rotor causes. After the flow channel, the expanded steam may have a temperature of 500 ° C and be used as a cooling medium.

Der entspannte Dampf wird üblicherweise in einem Zwischenüberhitzer auf einen Druck von ca. 350 bar (35000 kPa) gebracht und als Zwischenüberhitzerdampf bezeichnet. Dieser zwischenüberhitzte Dampf kann ebenfalls als Kühlmedium verwendet werden.The expanded steam is usually brought in a reheater to a pressure of about 350 bar (35000 kPa) and as Reheater steam called. This reheated steam can also be used as a cooling medium.

Das um die Innenrohrleitung befindliche Kühlmedium wirkt in radialer Richtung und übt somit eine mechanische Spannung auf die Innenrohrleitung und auf die Außenrohrleitung auf. Die Innenrohrleitung und die Außenrohrleitung werden dadurch mechanisch entlastet.The cooling medium located around the inner pipe acts in the radial direction and thus exerts a mechanical stress on the inner pipe and on the outer pipe. The inner pipe and the outer pipe are thereby mechanically relieved.

In einer vorteilhaften Weiterbildung ist die Außenrohrleitung an einer ersten Stelle um die Innenrohrleitung miteinander verbunden, wobei darunter eine mechanisch festsitzende Verbindung zu verstehen ist. Diese Verbindung kann beispielsweise durch Verbindungsmittel wie Schrauben oder ähnliches erreicht werden. Eine weitere Möglichkeit, die Außenrohrleitung an einer ersten Stelle an die Innenrohrleitung zu verbinden wäre es, wenn die Außenrohrleitung und die Innenrohrleitung materialeinstückig ausgebildet sind. Durch diese Anordnung an der ersten Stelle wird ein Ausströmen des Kühlmediums aus dem Raum zwischen der Außenrohrleitung und der Innenrohrleitung verhindert.In an advantageous development, the outer pipe is connected to one another at a first location around the inner pipe, which is to be understood as a mechanically fixed connection. This connection can be achieved for example by connecting means such as screws or the like. Another way to connect the outer pipe at a first location to the inner pipe would be if the outer pipe and the inner pipe are formed materialeinstückig. By this arrangement at the first location, a leakage of the cooling medium from the space between the outer pipe and the inner pipe is prevented.

In einer weiteren vorteilhaften Weiterbildung ist die Außenrohrleitung an einer zweiten Stelle mit der Innenrohrleitung miteinander verbunden. Durch diese Maßnahme wird ein Ausströmen des Kühlmediums aus dem Raum zwischen der Außenrohrleitung und der Innenrohrleitung verhindert.In a further advantageous development, the outer pipe is connected to one another at a second location with the inner pipe. By this measure, leakage of the cooling medium from the space between the outer pipe and the inner pipe is prevented.

Vorteilhafter Weise ist zwischen der ersten und zweiten Stelle eine Zuströmöffnung angeordnet. Dadurch ist eine einfache Möglichkeit gegeben, um das Kühlmedium in dem Raum zwischen der Außenrohrleitung und der Innenrohrleitung zu füllen.Advantageously, an inflow opening is arranged between the first and second locations. This provides a simple way to fill the cooling medium in the space between the outer pipe and the inner pipe.

Weitere Ausbildungen und Vorteile der Erfindung ergeben sich aus dem nachfolgenden Beschreibungsteil, in welchem ein Ausführungsbeispiel der Erfindung anhand einer Zeichnung näher erläutert ist.Further embodiments and advantages of the invention will become apparent from the following description part, in which an embodiment of the invention with reference to a drawing is explained in more detail.

Darin zeigen:

Figur 1
eine Querschnittsansicht einer Dampfturbine,
Figur 2
eine Teil-Querschnittsansicht einer Dampftur- bine in axialer Richtung, und
Figur 3
eine alternative Ausführungsform einer Dampfzuführung in Querschnittsansicht.
Show:
FIG. 1
a cross-sectional view of a steam turbine,
FIG. 2
a partial cross-sectional view of a steam turbine in the axial direction, and
FIG. 3
an alternative embodiment of a steam supply in cross-sectional view.

In der Figur 1 ist eine Querschnittsansicht einer Dampfturbine 1 als Ausführungsform einer Strömungsmaschine dargestellt. Die Dampfturbine 1 umfasst ein Außengehäuse 2 und ein Innengehäuse 3. Das Innengehäuse 3 ist innerhalb des Außengehäuses 2 angeordnet. Das Innengehäuse 3 und das Außengehäuse 2 ist um eine Rotationsachse 4 im Wesentlichen symmetrisch ausgebildet. Innerhalb des Innengehäuses 3 ist eine Welle 5 um die Rotationsachse 4 drehbar gelagert. Zwischen der Welle 5 und dem Innengehäuse 3 ist ein Strömungskanal 6 ausgebildet. Der Strömungskanal 6 ist charakterisiert durch auf der Welle 5 angeordnete Laufschaufeln 7 und im Innengehäuse 3 angeordnete Leitschaufeln 8. Der Übersichtlichkeit wegen ist lediglich eine Leitschaufel und eine Laufschaufel mit dem Bezugszeichen 8 bzw. 7 in der Figur 1 gekennzeichnet.In the FIG. 1 is a cross-sectional view of a steam turbine 1 shown as an embodiment of a turbomachine. The steam turbine 1 comprises an outer housing 2 and an inner housing 3. The inner housing 3 is arranged inside the outer housing 2. The inner housing 3 and the outer housing 2 is formed substantially symmetrically about a rotation axis 4. Within the inner housing 3, a shaft 5 is rotatably supported about the axis of rotation 4. Between the shaft 5 and the inner housing 3, a flow channel 6 is formed. The flow channel 6 is characterized by blades 7 arranged on the shaft 5 and vanes 8 arranged in the inner casing 3. For the sake of clarity, only one vane and one blade with the reference symbols 8 and 7 are shown in FIG FIG. 1 characterized.

Im Betrieb strömt Frischdampf über einen Einströmkanal 9 in die Dampfturbine 1. Der Frischdampf strömt anschließend in den Strömungskanal 6 an den Leit- bzw. Laufschaufeln 8, 7 vorbei, entspannt und kühlt sich dabei ab. Die thermische Energie des Dampfes wird hierbei in Rotationsenergie der Welle 5 umgewandelt. Der entspannte Dampf strömt anschließend über einen Abgasstutzen 10 aus der Dampfturbine 1 heraus.In operation, live steam flows via an inflow channel 9 into the steam turbine 1. The live steam subsequently flows into the flow channel 6 past the guide vanes or rotor blades 8, 7, thereby releasing and cooling. The thermal energy of the steam is converted into rotational energy of the shaft 5. The expanded steam subsequently flows out of the steam turbine 1 via an exhaust nozzle 10.

In modernen Dampfturbinen weist der Frischdampf Temperaturen von über 600°C und einen Druck von über 300 bar auf. Wie in der Figur 2 dargestellt, wird der Frischdampf über eine Frischdampfzuführung 11 in die Dampfturbine 1 geleitet. Die Figur 2 stellt eine Querschnittsansicht dar, wobei diese Querschnittsansicht in axialer Richtung dargestellt ist. Die Dampfzuführung 11 umfasst eine erste Innenrohrleitung 12 zum Führen von einem Strömungsmedium, wie z.B. den Frischdampf. Die Innenrohrleitung 12 ist zum Anlegen an eine Innengehäuse-Einströmöffnung 13 des Innengehäuses 3 ausgebildet. Des Weiteren weist die Dampfzuführung 11 eine um die Innenrohrleitung 12 angeordnete Außenrohrleitung 14 auf. Die Dampfführung 11 ist zum Anlegen an eine Außengehäuse-Einströmöffnung 15 ausgebildet. In den Raum 16 zwischen der Innenrohrleitung 12 und der Außenrohrleitung 14 wird ein Kühlmedium zugeführt. Das Kühlmedium kühlt primär die Außenrohrleitung 14. Das Kühlmedium strömt über eine Kühlmedium-Zuströmungsöffnung 17 in den Raum 16. Die Innenrohrleitung 12 und die Außenrohrleitung 14 sind an einer ersten Stelle 18 miteinander verbunden, d.h., dass das Kühlmedium im Raum 16 nicht in den Raum 19 zwischen dem Innengehäuse 3 und dem Außengehäuse 2 strömen kann. Die Dampfzuführung 11 wird an einem Ende 20 über Dichtungen 21 dichtend an das Innengehäuse 3 angebracht. Die Kühlmedium-Zuströmungsöffnung 17 ist zwischen der ersten Stelle 18 und einer zweiten Stelle 22 angeordnet. Die Dampfzuführung 11 kann aus im Wesentlichen zwei Bauteilen aufgebaut werden, wobei die Dampfzuführung 11 aus einem ersten Bauteil 23 und einem zweiten Bauteil 24 ausgebildet ist. Das erste Bauteil 23 kann über eine Schraubverbindung 25 an das Außengehäuse 2 angebracht werden. Das zweite Bauteil 24 kann ebenfalls über Schraubverbindungen oder ähnlichen Befestigungsmitteln an dem ersten Bauteil 23 angebunden werden. Die Befestigungsmittel sind in der Figur 2 nicht näher dargestellt. Als Beispiel für ein Befestigungsmittel kann eine Schraube dienen.In modern steam turbines, the live steam has temperatures of over 600 ° C and a pressure of over 300 bar. Like in the FIG. 2 shown, the live steam is passed through a live steam supply 11 in the steam turbine 1. The FIG. 2 is a cross-sectional view, this cross-sectional view is shown in the axial direction. The Steam supply 11 comprises a first inner pipe 12 for guiding a flow medium, such as the live steam. The inner pipe 12 is designed to be applied to an inner housing inflow opening 13 of the inner housing 3. Furthermore, the steam feed 11 has an outer pipe 14 arranged around the inner pipe 12. The steam guide 11 is designed for application to an outer housing inflow opening 15. In the space 16 between the inner pipe 12 and the outer pipe 14, a cooling medium is supplied. The cooling medium primarily cools the outer pipe 14. The cooling medium flows via a cooling medium inflow opening 17 into the space 16. The inner pipe 12 and the outer pipe 14 are connected to one another at a first location 18, ie, the cooling medium in the space 16 is not in the room 19 can flow between the inner housing 3 and the outer housing 2. The steam supply 11 is sealingly attached to one end 20 via seals 21 to the inner housing 3. The cooling medium inflow port 17 is disposed between the first location 18 and a second location 22. The steam feed 11 can be constructed from essentially two components, the steam feed 11 being formed from a first component 23 and a second component 24. The first component 23 can be attached to the outer housing 2 via a screw connection 25. The second component 24 can also be connected to the first component 23 via screw connections or similar fastening means. The fasteners are in the FIG. 2 not shown in detail. As an example of a fastener may serve a screw.

Das erste Bauteil 23 umfasst eine erste Innenrohrleitung 26 auf. Des Weiteren weist das erste Bauteil 23 eine erste Außenrohrleitung 27 auf. Das zweite Bauteil 24 weist eine zweite Innenrohrleitung 28 und eine zweite Außenrohrleitung 29 auf. Zwischen der ersten Innenrohrleitung 26 und der zweiten Innenrohrleitung 28 kann eine I-Ring-Dichtung 30 angeordnet werden. Solch eine I-Ring-Dichtung 30 kann auch zwischen der ersten Außenrohrleitung 27 und der zweiten Außenrohrleitung 29 angeordnet werden.The first component 23 comprises a first inner pipe 26. Furthermore, the first component 23 has a first outer pipe 27. The second component 24 has a second inner pipe 28 and a second outer pipe 29. Between the first inner pipe 26 and the second inner pipe 28, an I-ring seal 30 can be arranged. Such an I-ring seal 30 may also be between the first outer pipe 27 and the second outer pipe 29 are arranged.

Die Innenrohrleitung 12 und die Außenrohrleitung 14 werden materialeinstückig ausgebildet. Beispielsweise kann dasselbe Material verwendet werden, das auch für das Innengehäuse 3 verwendet wird. Wie in Figur 2 zu sehen ist, wird zwischen der ersten Innenrohrleitung 26 und der ersten Außenrohrleitung 27 sowie zwischen der zweiten Innenrohrleitung 28 und der zweiten Außenrohrleitung 29 ein gemeinsamer Raum gebildet.The inner pipe 12 and the outer pipe 14 are formed materialeinstückig. For example, the same material that is used for the inner housing 3 can be used. As in FIG. 2 is seen, a common space is formed between the first inner pipe 26 and the first outer pipe 27 and between the second inner pipe 28 and the second outer pipe 29.

In der Figur 3 ist eine alternative Ausführungsform der Dampfzuführung 11 dargestellt. Die Dampfzuführung 11 gemäß Figur 3 wird derart angeordnet, dass die Außenrohrleitung 14 an dem Außengehäuse 2 mittels Befestigungsmitteln, die nicht näher dargestellt sind, angebracht ist. Ebenso weist die Dampfzuführung 11 ein Innenrohr 12 auf, das innerhalb des Außenrohrs 14 angeordnet ist. Zwischen der Innenrohrleitung 12 und der Außenrohrleitung 14 wird ebenfalls ein Raum 16 ausgebildet. Das Außenrohr 14 wird an der ersten Befestigungsstelle 32 an das Außengehäuse 2 befestigt. Das Innenrohr 12 wird an einer zweiten Befestigungsstelle 31 an einem Zusatzrohr 33 angebunden. Das Zusatzrohr 33 kann aus dem gleichen Material bestehen wie das Außengehäuse 2. Über nicht näher dargestellte Befestigungsmittel wird das Zusatzrohr 33 an das Außengehäuse 2 an der ersten Befestigungsstelle 32 angebunden. An der zweiten Befestigungsstelle 31 wird eine weitere externe Rohrleitung an das Zusatzrohr 33 angebunden. Das Kühlmittel kann in der Ausführungsform der Dampfzuführung 11 gemäß Figur 3 entweder im Zusatzrohr 33 erfolgen oder durch eine Kühlmedium-Zuströmungsöffnung im Außenrohr 14, wobei beide Zuführungsöffnungen in der Figur 3 nicht näher dargestellt sind. Die Außenrohrleitung 14 wird als sogenanntes Thermo-Sleeve ausgeführt. D.h., dass die Außenrohrleitung 14 einen axialen Temperaturgradienten übernimmt.In the FIG. 3 an alternative embodiment of the steam feed 11 is shown. The steam supply 11 according to FIG. 3 is arranged such that the outer pipe 14 is attached to the outer housing 2 by means of fastening means, which are not shown in detail. Likewise, the steam supply 11 to an inner tube 12 which is disposed within the outer tube 14. Between the inner pipe 12 and the outer pipe 14, a space 16 is also formed. The outer tube 14 is attached to the outer housing 2 at the first attachment point 32. The inner tube 12 is connected to a second attachment point 31 on an additional tube 33. The additional tube 33 may consist of the same material as the outer housing 2. About not shown fastening means, the additional tube 33 is connected to the outer housing 2 at the first attachment point 32. At the second attachment point 31, a further external pipe is connected to the additional pipe 33. The coolant may in the embodiment of the steam supply 11 according to FIG. 3 take place either in the additional tube 33 or by a cooling medium inflow opening in the outer tube 14, wherein both supply openings in the FIG. 3 are not shown in detail. The outer pipe 14 is designed as a so-called thermal sleeve. That is, the outer pipe 14 assumes an axial temperature gradient.

Eine Erhöhung des Durchsatzes an Kühlmedium in dem Raum 16 erhält man, indem mehrere Kühlmedium-Zuströmungsöffnungen 17 in der Àußenrchrleitung 14 angeordnet werden. Die Außenrohrleitung 14 wird sozusagen perforiert.An increase in the flow rate of cooling medium in the space 16 is obtained by arranging a plurality of cooling medium inflow openings 17 in the outer circuit 14. The outer pipe 14 is perforated, so to speak.

Claims (10)

  1. Steam feed (11) for a turbomachine (1), which comprises an inner casing (3) and an outer casing (2), comprising a first component (23),
    which comprises:
    a first inner pipe (12) for the guiding of flow medium, wherein the inner pipe (12) is designed for abutting onto an inner-casing admission opening (13) of the inner casing (3),
    an outer pipe (14) which is arranged around the inner pipe (12), wherein the steam feed (11) is designed for abutting onto an outer-casing admission opening (15) of the turbomachine (1),
    wherein a cooling-medium inflow opening (17) is provided for feeding cooling medium between the inner pipe (12) and the outer pipe (14),
    wherein the steam feed (11) comprises a second component (24),
    wherein the second component (24) has a second inner pipe (28) and a second outer pipe (29),
    characterized in that
    the outer pipe (14) is formed from the first outer pipe (27) and the second outer pipe (29), and the inner pipe (12) is formed from the first inner pipe (26) and the second inner pipe (28).
  2. Steam feed (11) according to Claim 1,
    wherein the outer pipe (14) is connected to the inner pipe (12) at a first point (18).
  3. Steam feed (11) according to Claim 1 or 2,
    wherein the outer pipe (14) is connected to the inner pipe (12) at a second point (22).
  4. Steam feed (11) according to Claim 3,
    wherein the inflow opening is arranged between the first (18) and the second point (22).
  5. Steam feed (11) according to one of the preceding claims,
    wherein the outer pipe (14) has fastening means for the fastening onto the outer casing (2).
  6. Steam feed (11) according to Claim 5,
    wherein the fastening means comprises a screw.
  7. Steam feed (11) according to one of the preceding claims,
    wherein an I-ring seal is arranged between the first outer pipe (27) and the second outer pipe (29).
  8. Steam feed (11) according to one of the preceding claims,
    wherein an I-ring seal (30) is arranged between the first inner pipe (26) and the second inner pipe (28).
  9. Steam feed (11) according to Claim 2,
    wherein a jacket is arranged around the inner pipe (12) and the inner pipe (12) is fastened on the jacket.
  10. Steam feed (11) according to Claim 2 or 3,
    wherein the first inner pipe (26) and the first outer pipe (27) are formed materially in one piece.
EP08775350A 2007-08-08 2008-07-25 Steam supply for a steam turbine Not-in-force EP2173973B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08775350A EP2173973B1 (en) 2007-08-08 2008-07-25 Steam supply for a steam turbine

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP07015628A EP2025873A1 (en) 2007-08-08 2007-08-08 Steam infeed for a steam turbine
PCT/EP2008/059811 WO2009019151A1 (en) 2007-08-08 2008-07-25 Steam supply for a steam turbine
EP08775350A EP2173973B1 (en) 2007-08-08 2008-07-25 Steam supply for a steam turbine

Publications (2)

Publication Number Publication Date
EP2173973A1 EP2173973A1 (en) 2010-04-14
EP2173973B1 true EP2173973B1 (en) 2011-03-02

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EP07015628A Withdrawn EP2025873A1 (en) 2007-08-08 2007-08-08 Steam infeed for a steam turbine
EP08775350A Not-in-force EP2173973B1 (en) 2007-08-08 2008-07-25 Steam supply for a steam turbine

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP07015628A Withdrawn EP2025873A1 (en) 2007-08-08 2007-08-08 Steam infeed for a steam turbine

Country Status (7)

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US (1) US8454302B2 (en)
EP (2) EP2025873A1 (en)
JP (1) JP5027924B2 (en)
CN (1) CN101772621B (en)
AT (1) ATE500401T1 (en)
DE (1) DE502008002747D1 (en)
WO (1) WO2009019151A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3406951A1 (en) * 2017-05-24 2018-11-28 Siemens Aktiengesellschaft Cooling assembly for cooling a union nut for a valve of a steam turbine

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB825849A (en) * 1955-03-01 1959-12-23 Gen Electric Improvements relating to elastic fluid turbines
US2800299A (en) * 1955-09-30 1957-07-23 Gen Electric Nozzlebox structure for high temperature steam turbine
GB1135767A (en) * 1965-04-02 1968-12-04 Ass Elect Ind Improvements in or relating to steam turbines
CH665450A5 (en) * 1983-06-09 1988-05-13 Bbc Brown Boveri & Cie VALVE FOR HORIZONTAL STEAM FEEDING ON TWO HOUSING TURBINES.
JPH0621521B2 (en) * 1983-06-10 1994-03-23 株式会社日立製作所 Main structure of steam turbine main steam inlet
JPH0674722B2 (en) * 1984-10-15 1994-09-21 株式会社日立製作所 Structure of steam inlet of steam turbine
US4772178A (en) * 1987-01-28 1988-09-20 Westinghouse Electric Corp. Thermal shield for the steam inlet connection of a steam turbine
DE3905900A1 (en) * 1989-02-25 1990-08-30 Gutehoffnungshuette Man FRESH STEAM PERFORMANCE FOR STEAM TURBINES IN DOUBLE HOUSING DESIGN
JPH0662936B2 (en) 1989-07-28 1994-08-17 サンデン株式会社 Method of releasing supercooling of heat storage agent having supercooling property
JPH05113104A (en) * 1991-10-21 1993-05-07 Fuji Electric Co Ltd Steam extraction part of steam turbine
JPH07145707A (en) * 1993-11-24 1995-06-06 Mitsubishi Heavy Ind Ltd Steam turbine
JP4455254B2 (en) * 2004-09-30 2010-04-21 株式会社東芝 Steam turbine and steam turbine plant provided with the same

Also Published As

Publication number Publication date
JP5027924B2 (en) 2012-09-19
US8454302B2 (en) 2013-06-04
CN101772621A (en) 2010-07-07
CN101772621B (en) 2013-05-15
JP2011510200A (en) 2011-03-31
ATE500401T1 (en) 2011-03-15
WO2009019151A1 (en) 2009-02-12
EP2025873A1 (en) 2009-02-18
EP2173973A1 (en) 2010-04-14
WO2009019151A9 (en) 2010-06-10
DE502008002747D1 (en) 2011-04-14
US20110226376A1 (en) 2011-09-22

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