EP2173973A1 - Steam supply for a steam turbine - Google Patents

Steam supply for a steam turbine

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Publication number
EP2173973A1
EP2173973A1 EP08775350A EP08775350A EP2173973A1 EP 2173973 A1 EP2173973 A1 EP 2173973A1 EP 08775350 A EP08775350 A EP 08775350A EP 08775350 A EP08775350 A EP 08775350A EP 2173973 A1 EP2173973 A1 EP 2173973A1
Authority
EP
European Patent Office
Prior art keywords
pipe
steam
inner pipe
steam supply
outer pipe
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.)
Granted
Application number
EP08775350A
Other languages
German (de)
French (fr)
Other versions
EP2173973B1 (en
Inventor
Kai Wieghardt
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 EP08775350A priority Critical patent/EP2173973B1/en
Publication of EP2173973A1 publication Critical patent/EP2173973A1/en
Application granted granted Critical
Publication of EP2173973B1 publication Critical patent/EP2173973B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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

  • the invention relates to a steam feed for a turbomachine comprising an inner housing and an outer housing, in particular a steam turbine, comprising: a first inner conduit for guiding flow medium, wherein the inner conduit is designed for application to an inner housing inflow opening of the inner housing, one arranged around the inner conduit Outer pipe, wherein the steam supply is designed for application to an outer housing inflow opening of the turbomachine.
  • Turbomachines such as steam turbines, are operated with a flow medium.
  • steam turbines In steam turbines is
  • Water vapor used as a flow medium which may have a temperature of about 600 0 C at a pressure of about 300 bar. 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.
  • 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 inlet nozzles through the outer housing and the inner housing into the flow channel. The area around these inflow is therefore subjected to high thermal loads.
  • suitable steam supply lines the hot water vapor is thermally decoupled from the outer housing as possible.
  • the object of the invention is to provide a steam supply which is suitable for high temperatures. This object is achieved by the features of claim 1. Further advantageous developments are specified in the dependent claims.
  • 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.
  • the invention shows, 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.
  • 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.
  • live steam at a temperature of about 620 0 C and a pressure of about 350 bar is flowed into the steam turbine and expanded in the flow channel, wherein the thermal energy of the steam is converted into mechanical energy and causes a rotation of the rotor.
  • the expanded steam may have a temperature of 500 0 C and used as a cooling medium.
  • the expanded steam is usually brought in a reheater to a pressure of about 350 bar and as Reheater steam called.
  • This reheated steam can also be used as a cooling medium.
  • 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.
  • 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 centrein Culture Divisionig. This arrangement at the first location prevents the coolant from flowing out of the space between the outer pipe and the inner pipe.
  • the outer pipe is connected to one another at a second location with the inner pipe.
  • 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.
  • Figure 1 shows a cross-sectional view of a steam turbine
  • Figure 2 is a partial cross-sectional view of a steam turbine in the axial direction
  • Figure 3 shows an alternative embodiment of a steam supply in cross-sectional view.
  • FIG. 1 shows a cross-sectional view of a steam turbine 1 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.
  • a shaft 5 is rotatably supported about the axis of rotation 4.
  • a flow channel 6 is formed between the shaft 5 and the inner housing 3.
  • 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 are denoted by the reference symbols 8 and 7 in FIG.
  • 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.
  • the live steam has temperatures of over 600 0 C and a pressure of over 300 bar. As shown in Figure 2, the live steam over a
  • FIG. 2 shows a cross-sectional view, this cross-sectional view being shown in the axial direction.
  • the Steam feed 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.
  • 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.
  • the cooling medium primarily cools the outer pipe 14.
  • 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 does not enter the space 19 between the inner housing 3 and the outer housing 2 can flow.
  • the steam feed 11 is attached at one end 20 via seals 21 sealingly against 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 fastening means are not shown in detail in FIG. As an example of a fastener may serve a screw.
  • 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.
  • the inner pipe 12 and the outer pipe 14 are formed centrein Kirby, the same material that is used for the inner housing 3 can be used. As can be seen in FIG. 2, 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.
  • FIG. 3 shows an alternative embodiment of the steam feed 11.
  • the steam supply 11 according to Figure 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.
  • the steam supply 11 to an inner tube 12 which is disposed within the outer tube 14.
  • 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.
  • the attachment tube 33 is connected to the outer housing 2 at the first attachment point 32 via fastening means not shown in greater detail.
  • a further external pipe is connected to the additional pipe 33.
  • the coolant can take place either in the additional pipe 33 or through a cooling medium inflow opening in the outer pipe 14, wherein both feed openings are not shown in detail in FIG.
  • the outer pipe 14 is designed as a so-called thermal sleeve. That is, the outer pipe 14 assumes an axial temperature gradient. 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 pipe 14.
  • the outer pipe 14 is perforated, so to speak.

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

DampfZuführung für eine DampfturbineSteam supply for a steam turbine
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 Innen- rohrleitung angeordnete Außenrohrleitung, wobei die Dampfzuführung zum Anlegen an eine Außengehäuse-Einströmöffnung der Strömungsmaschine ausgebildet ist.The invention relates to a steam feed for a turbomachine comprising an inner housing and an outer housing, in particular a steam turbine, comprising: a first inner conduit for guiding flow medium, wherein the inner conduit is designed for application to an inner housing inflow opening of the inner housing, one arranged around the inner conduit Outer pipe, wherein the steam supply is designed for application to an outer housing inflow opening of the turbomachine.
Strömungsmaschinen, wie zum Beispiel Dampfturbinen, werden mit einem Strömungsmedium betrieben. In Dampfturbinen wirdTurbomachines, such as steam turbines, are operated with a flow medium. In steam turbines is
Wasserdampf als Strömungsmedium verwendet, der eine Temperatur von über 6000C bei einem Druck von über 300 bar 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.Water vapor used as a flow medium, which may have a temperature of about 600 0 C at a pressure of about 300 bar. 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 hin- ein. 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 inlet nozzles 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 water vapor is thermally decoupled from the outer housing as possible.
Aufgabe der Erfindung ist es, eine DampfZuführung anzugeben, die für hohe Temperaturen geeignet ist. Gelöst wird diese Aufgabe durch die Merkmale des Anspruchs 1. Weitere vorteilhafte Weiterbildungen sind in den Unteransprüchen angegeben.The object of the invention is to provide a steam supply which is suitable for high temperatures. 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 ver- wendet werden.The invention shows, 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. 6200C und einem Druck von ca. 350 bar 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 5000C 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 0 C and a pressure of about 350 bar is flowed into the steam turbine and expanded in the flow channel, wherein the thermal energy of the steam is converted into mechanical energy and causes a rotation of the rotor. After the flow channel, the expanded steam may have a temperature of 500 0 C and used as a cooling medium.
Der entspannte Dampf wird üblicherweise in einem Zwischenüberhitzer auf einen Druck von ca. 350 bar 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 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 Kühlme- diums 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. This arrangement at the first location prevents the coolant from flowing out of the space between the outer pipe and the inner pipe.
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. Darin zeigen: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. Show:
Figur 1 eine Querschnittsansicht einer Dampfturbine, Figur 2 eine Teil-Querschnittsansicht einer Dampftur- bine in axialer Richtung, und1 shows a cross-sectional view of a steam turbine, Figure 2 is a partial cross-sectional view of a steam turbine in the axial direction, and
Figur 3 eine alternative Ausführungsform einer DampfZuführung in Querschnittsansicht.Figure 3 shows 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.FIG. 1 shows a cross-sectional view of a steam turbine 1 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 are denoted by the reference symbols 8 and 7 in FIG.
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 6000C und einen Druck von über 300 bar auf. Wie in der Figur 2 dargestellt, wird der Frischdampf über eineIn modern steam turbines, the live steam has temperatures of over 600 0 C and a pressure of over 300 bar. As shown in Figure 2, the live steam over a
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 Wei- teren 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. DasFrischdampfZuführung 11 passed into the steam turbine 1. FIG. 2 shows a cross-sectional view, this cross-sectional view being shown in the axial direction. The Steam feed 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
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 Dampf- Zuführung 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.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 does not enter the space 19 between the inner housing 3 and the outer housing 2 can flow. The steam feed 11 is attached at one end 20 via seals 21 sealingly against 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 fastening means are not shown in detail in FIG. 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 can be seen in FIG. 2, 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 glei- chen 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. Eine Erhöhung des Durchsatzes an Kühlmedium in dem Raum 16 erhält man, indem mehrere Kühlmedium-Zuströmungsöffnungen 17 in der Außenrohrleitung 14 angeordnet werden. Die Außenrohrleitung 14 wird sozusagen perforiert. FIG. 3 shows an alternative embodiment of the steam feed 11. The steam supply 11 according to Figure 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. The attachment tube 33 is connected to the outer housing 2 at the first attachment point 32 via fastening means not shown in greater detail. At the second attachment point 31, a further external pipe is connected to the additional pipe 33. In the embodiment of the steam feed 11 according to FIG. 3, the coolant can take place either in the additional pipe 33 or through a cooling medium inflow opening in the outer pipe 14, wherein both feed openings are not shown in detail in FIG. The outer pipe 14 is designed as a so-called thermal sleeve. That is, the outer pipe 14 assumes an axial temperature gradient. 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 pipe 14. The outer pipe 14 is perforated, so to speak.

Claims

Patentansprüche claims
1. DampfZuführung (11) für eine ein Innengehäuse (3) und ein Außengehäuse (2) umfassende Strömungsmaschine (1), umfassend ein erstes Bauteil (23) , umfassend: eine erste Innenrohrleitung (12) zum Führen von Strömungsmedium, wobei die Innenrohrleitung (12) zum Anlegen an eine Innengehäuse-Einströmöffnung (13) des Innengehäuses (3) ausgebildet ist, eine um die Innenrohrleitung (12) angeordnete Außenrohrleitung (14), wobei die DampfZuführung (11) zum Anlegen an eine Außengehäuse-Einströmöffnung (15) der Strömungsma- schine (1) ausgebildet ist, wobei eine Kühlmedium-Zuströmungsöffnung (17) zum Zuführen von Kühlmedium zwischen der Innenrohrleitung (12) und der Außenrohrleitung (14) vorgesehen ist, wobei die DampfZuführung (11) ein zweites Bauteil (24) um- fasst, wobei das zweite Bauteil (24) eine zweite Innenrohrleitung (28) und eine zweite Außenrohrleitung (29) aufweist, dadurch gekennzeichnet, dass die Außenrohrleitung (14) aus der ersten Außenrohrleitung (27) und der zweiten Außenrohrleitung (29) ausgebildet ist und die Innenrohrleitung (12) aus der ersten Innenrohrleitung (26) und der zweiten Innenrohrleitung (28) ausgebildet ist .A steam supply (11) for a turbomachine (1) comprising an inner casing (3) and an outer casing (2), comprising a first component (23) comprising: a first inner pipe (12) for carrying flow medium, the inner pipe ( 12) for application to an inner housing inflow opening (13) of the inner housing (3) is formed around the inner pipe (12) arranged outer pipe (14), wherein the steam supply (11) for application to an outer housing inflow opening (15) Turbomachine (1) is formed, wherein a cooling medium inflow opening (17) for supplying cooling medium between the inner pipe (12) and the outer pipe (14) is provided, wherein the steam supply (11) a second component (24) um- wherein the second component (24) has a second inner pipe (28) and a second outer pipe (29), characterized in that the outer pipe (14) from the first outer pipe (27) and the second outer pipe (29) is formed, and the inner pipe (12) is formed of the first inner pipe (26) and the second inner pipe (28).
2. DampfZuführung (11) nach Anspruch 1, wobei die Außenrohrleitung (14) an einer ersten Stelle (18) mit der Innenrohrleitung (12) verbunden ist.2. Steam supply (11) according to claim 1, wherein the outer pipe (14) at a first point (18) is connected to the inner pipe (12).
3. DampfZuführung (11) nach Anspruch 1 oder 2, wobei die Außenrohrleitung (14) an einer zweiten Stelle (22) mit der Innenrohrleitung (12) verbunden ist. 3. steam feed (11) according to claim 1 or 2, wherein the outer pipe (14) at a second point (22) with the inner pipe (12) is connected.
4. DampfZuführung (11) nach Anspruch 3, wobei die Zuströmöffnung zwischen der ersten (18) und der zweiten Stelle (22) angeordnet ist.4. steam supply (11) according to claim 3, wherein the inflow opening between the first (18) and the second location (22) is arranged.
5. DampfZuführung (11) nach einem der vorhergehenden Ansprüche, wobei die Außenrohrleitung (14) Befestigungsmittel zum Befestigen an das Außengehäuse (2) aufweist.5. steam supply (11) according to any one of the preceding claims, wherein the outer pipe (14) has fastening means for fastening to the outer housing (2).
6. DampfZuführung (11) nach Anspruch 5, wobei das Befestigungsmittel eine Schraube umfasst.6. Steam supply (11) according to claim 5, wherein the fastening means comprises a screw.
7. DampfZuführung (11) nach einem der vorhergehenden Ansprüche, wobei zwischen der ersten Außenrohrleitung (27) und der zweiten Außenrohrleitung (29) eine I-Ring-Dichtung angeordnet ist.7. steam supply (11) according to any one of the preceding claims, wherein between the first outer pipe (27) and the second outer pipe (29) an I-ring seal is arranged.
8. DampfZuführung (11) nach einem der vorhergehenden Ansprüche, wobei zwischen der ersten Innenrohrleitung (26) und der zweiten Innenrohrleitung (28) eine I-Ring-Dichtung (30) angeordnet ist.8. steam supply (11) according to any one of the preceding claims, wherein between the first inner pipe (26) and the second inner pipe (28) an I-ring seal (30) is arranged.
9. DampfZuführung (11) nach Anspruch 2, wobei um die Innenrohrleitung (12) eine Ummantelung angeordnet ist und die Innenrohrleitung (12) an der Ummantelung befestigt ist.9. steam supply (11) according to claim 2, wherein a sheathing is arranged around the inner pipe (12) and the inner pipe (12) is fixed to the casing.
10. DampfZuführung (11) nach Anspruch 2 oder 3, wobei die Innenrohrleitung (12) und die Außenrohrleitung (14) materialeinstückig ausgebildet sind. 10. steam supply (11) according to claim 2 or 3, wherein the inner pipe (12) and the outer pipe (14) are formed integrally material.
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
EP08775350A EP2173973B1 (en) 2007-08-08 2008-07-25 Steam supply for a steam turbine
PCT/EP2008/059811 WO2009019151A1 (en) 2007-08-08 2008-07-25 Steam supply for a steam turbine

Publications (2)

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

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EP07015628A Withdrawn EP2025873A1 (en) 2007-08-08 2007-08-08 Steam infeed for a steam turbine

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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)

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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

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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

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Also Published As

Publication number Publication date
EP2173973B1 (en) 2011-03-02
WO2009019151A9 (en) 2010-06-10
ATE500401T1 (en) 2011-03-15
WO2009019151A1 (en) 2009-02-12
US8454302B2 (en) 2013-06-04
CN101772621B (en) 2013-05-15
EP2025873A1 (en) 2009-02-18
CN101772621A (en) 2010-07-07
JP2011510200A (en) 2011-03-31
DE502008002747D1 (en) 2011-04-14
US20110226376A1 (en) 2011-09-22
JP5027924B2 (en) 2012-09-19

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