EP2598724A1 - Steam turbine and process for cooling such a steam turbine - Google Patents

Steam turbine and process for cooling such a steam turbine

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Publication number
EP2598724A1
EP2598724A1 EP11740595.1A EP11740595A EP2598724A1 EP 2598724 A1 EP2598724 A1 EP 2598724A1 EP 11740595 A EP11740595 A EP 11740595A EP 2598724 A1 EP2598724 A1 EP 2598724A1
Authority
EP
European Patent Office
Prior art keywords
steam
rotor
cooling
flow channel
stator
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
EP11740595.1A
Other languages
German (de)
French (fr)
Other versions
EP2598724B1 (en
Inventor
Ingo Förster
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 EP11740595.1A priority Critical patent/EP2598724B1/en
Publication of EP2598724A1 publication Critical patent/EP2598724A1/en
Application granted granted Critical
Publication of EP2598724B1 publication Critical patent/EP2598724B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • F01D25/14—Casings modified therefor
    • 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
    • F01D25/08—Cooling; Heating; Heat-insulation
    • 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
    • F01D3/00—Machines or engines with axial-thrust balancing effected by working-fluid
    • 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
    • F05D2260/00—Function
    • F05D2260/20—Heat transfer, e.g. cooling
    • F05D2260/232—Heat transfer, e.g. cooling characterized by the cooling medium
    • F05D2260/2322—Heat transfer, e.g. cooling characterized by the cooling medium steam

Definitions

  • the invention relates to a steam turbine according to the
  • Cooling steam is supplied externally. Via a corresponding feed line to the outer housing of the stator of the turbine, an outer housing cooling bore, a flow space between the outer and inner housings of the stator and an inner housing cooling bore, cooling steam is thus subjected to particularly high thermal stress
  • This transverse line serves to additionally supply cooling steam to the live steam in the event of a sudden pressure drop in the live steam feed line in order thus to avoid an excessive differential pressure load between the region to be cooled and the inflow region of the flow channel.
  • the object of the invention is to provide an improved steam turbine and an improved method for cooling such a steam turbine.
  • Fresh steam from the flow channel can thus be supplied directly to the cooling steam. This leads to a thermodynamic coupling and thus to a steady
  • additional sealing elements which are the thermally high claimed area, such as the m the stator engaging thrust piston of the rotor, of the
  • the radial pressure balance downstream of a blade can be utilized for pressure equalization during operation of the turbine. Physically exists namely in the generated in the flow channel
  • Pressure equalization cross-connection a space connection between live steam and cooling steam through which a
  • Cooling steam excess can be emptied directly, so that the sealing elements are less stressed.
  • the pressure equalization cross-connection is in
  • Cooling steam supply can short passageways of the
  • Inflow region 41 of the flow channel 4 is supplied.
  • the so-streamed live steam then flows downstream in the
  • the cooling steam supply 6 comprises in the present
  • Internal cooling hole 64 is disposed in the inner housing 21 and provides a fluidic connection between the
  • sealing elements Due to the pressure difference between cooling and live steam are to these sealing elements but to set particularly high demands. On the other hand, the sealing elements must also be designed so that they are "permeable" in the case of an emergency shutdown to rapidly reduce a cooling steam surplus.
  • Pressure equalization transverse connection 7 between the flow channel 4 and the cooling steam supply 6 is provided.
  • formed as a bore in the inner housing 21 of the stator 2 allows so that a part of the
  • Fresh steam from the flow channel 4 is fed directly to the cooling steam. This creates a pressure equalization between Frischdampfhoffm anddedampfhoffm through this cross-connection. At the same time, the cross connection in case of
  • the part of the live steam from the flow channel would then be supplied to the cooling steam only in this area.
  • the pressure equalizing cross-connection as indicated in the figure, consist of a radially and an axially aligned region, but it could also be as a straight Bore obliquely through the inner housing from the flow channel to the inner housing cooling bore lead.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

The invention relates to a steam turbine (1) having a stator (2), which comprises an inner casing (21) and an outer casing (22), a rotor (3), a flow duct (4), which is formed between the stator (2) and the rotor (3) and in which rows of rotor blades (33) of the rotor (3) and rows of guide vanes (23) of the stator (2) are arranged alternately, a live steam feed line (5) for feeding live steam into an inflow region (41) of the flow duct (4), such that the live steam can circulate around the rotor blades (33) and guide vanes (21) in the flow duct (4), and a cooling steam feed line (6) for feeding cooling steam into a region (34) of the rotor (3) which is subjected to high thermal loading, wherein a pressure compensation cross connection (7) is provided between the flow duct (4) and the cooling steam feed line (6). According to the invention, some of the live steam can thereby be fed from the flow duct (4) to the cooling steam.

Description

Beschreibung description
Dampfturbine sowie Verfahren zum Kühlen einer solchen Die Erfindung betrifft eine Dampfturbine gemäß dem Steam turbine and method for cooling such The invention relates to a steam turbine according to the
Oberbegriff des Anspruchs 1 sowie ein entsprechendes The preamble of claim 1 and a corresponding
Verfahren zur Kühlung einer solchen Dampfturbine gemäß Method for cooling such a steam turbine according to
Anspruch 6. Dampfturbinen werden mit Frischdampf, der eine Temperatur von mehreren hundert Grad aufweisen kann, als Arbeitsmedium betrieben. Dazu wird der Frischdampf in einen Strömungskanal, der zwischen Rotor und Stator ausgebildet ist eingeströmt, so dass dieser die in diesen Kanal hineinragenden Leitschaufeln des Stators und Laufschaufeln des Rotors umströmt. Dadurch expandiert der Frischdampf auf einen niedrigeren Druck und kühlt ab. Die dabei freigesetzte thermische Energie wird in Rotationsenergie des Rotors umgesetzt, die zum Antrieb eines mit dem Rotor gekoppelten Generators oder einer Claim 6. Steam turbines are operated with live steam, which may have a temperature of several hundred degrees, as a working medium. For this purpose, the live steam is flowed into a flow channel, which is formed between the rotor and stator, so that it flows around the projecting into this channel guide vanes of the stator and blades of the rotor. As a result, the live steam expands to a lower pressure and cools down. The thereby released thermal energy is converted into rotational energy of the rotor, which is used to drive a generator coupled to the rotor or a
Arbeitsmaschine benutzt werden kann. Working machine can be used.
Hohe Leistungen der Dampfturbine bedingen entsprechend hohe Arbeitstemperaturen des Frischdampfes und damit eine erhöhte thermische Belastung einzelner Komponenten der Dampfturbine. Diese, thermisch besonders belasteten Komponenten müssen aber ausreichend gekühlt werden, um den sicheren Betrieb der High outputs of the steam turbine require correspondingly high operating temperatures of the live steam and thus an increased thermal load of individual components of the steam turbine. However, these components subject to particularly high thermal loads must be sufficiently cooled in order to ensure the safe operation of the
Dampfturbine zu gewährleisten. To ensure steam turbine.
Aus der EP 2 067 933 ist dazu eine Vorrichtung bekannt, bei der der Dampfturbine neben dem Frischdampf zusätzlich From EP 2 067 933 a device is known in addition to the steam turbine in addition to the live steam
Kühldampf von extern zugeführt wird. Über eine entsprechende Zuleitung zum Außengehäuse des Stators der Turbine, eine Außengehäusekühlbohrung, einen Strömungsraum zwischen Außen- und Innengehäuse des Stators und eine Innengehäusekühlbohrung wird so Kühldampf in den besonders thermisch beanspruchten Cooling steam is supplied externally. Via a corresponding feed line to the outer housing of the stator of the turbine, an outer housing cooling bore, a flow space between the outer and inner housings of the stator and an inner housing cooling bore, cooling steam is thus subjected to particularly high thermal stress
Bereich der Dampfturbine, hier den Schubausgleichskolben des Rotors so eingebracht, dass dieser gezielt gekühlt wird. Area of the steam turbine, here introduced the thrust piston of the rotor so that it is specifically cooled.
Zusätzliche Dichtelemente trennen diesen Kühldampfräum von dem angrenzenden Frischdampfräum. Diese Dichtelemente müssen dabei einerseits möglichst dicht sein, um auch bei einer Änderung der Dampfzustände, so wie sie bei einem Lastwechsel auftreten, noch eine Rückwärtsströmung von Kühldampf in den Frischdampfräum zu verhindern. Anderseits müssen die Additional sealing elements separate this cooling steam space from the adjacent fresh steam room. On the one hand, these sealing elements must on the one hand be as tight as possible in order to prevent a reverse flow of cooling steam into the fresh steam space, even in the event of a change in the steam conditions, as occurs during a load change. On the other hand, the
Dichtelemente aber undicht genug sein, um im Falle einer Turbinenschnellabschaltung eine ausreichend schnelle  Sealing elements but leaking enough to be sufficiently fast in the case of a turbine quick shutdown
Druckentlastung zu gewährleisten. Diese Dichtelemente müssen somit für beide, sich aber widersprechende Anforderungen ausgelegt werden. To ensure pressure relief. These sealing elements must therefore be designed for both, but conflicting requirements.
Zudem ist aus der EP 2 067 933 eine Ausführung bekannt, bei der zusätzlich eine externe Querleitung zwischen externer Frischdampf- und Kühldampfzuleitung der Dampfturbine In addition, from EP 2 067 933 an embodiment is known, in addition to an external transverse line between the external live steam and cooling steam supply line of the steam turbine
vorgesehen ist. Diese Querleitung dient dazu, dass im Falle eines schlagartigen Druckabfalls in der Frischdampfzuleitung dem Frischdampf zusätzlich Kühldampf zugespeist werden kann, um so eine zu große Differenzdruckbelastung zwischen dem zu kühlenden Bereich und dem Einströmbereich des Strömungskanals zu vermeiden. is provided. This transverse line serves to additionally supply cooling steam to the live steam in the event of a sudden pressure drop in the live steam feed line in order thus to avoid an excessive differential pressure load between the region to be cooled and the inflow region of the flow channel.
Aufgabe der Erfindung ist es, eine verbesserte Dampfturbine sowie ein verbessertes Verfahren zur Kühlung einer solchen Dampfturbine bereitzustellen. The object of the invention is to provide an improved steam turbine and an improved method for cooling such a steam turbine.
Diese Aufgabe wird mit der Dampfturbine mit den Merkmalen des Anspruchs 1, sowie mit dem entsprechenden Verfahren mit den Merkmalen des Anspruchs 6 gelöst. Erfindungsgemäß ist dabei vorgesehen, dass durch eine This object is achieved with the steam turbine having the features of claim 1, and with the corresponding method having the features of claim 6. According to the invention it is provided that by a
zusätzliche Druckausgleichsquerverbindung zwischen additional pressure compensation cross connection between
Strömungskanal und Kühldampfzufuhr, ein Teil des Flow channel and cooling steam supply, part of the
Frischdampfes aus dem Strömungskanal somit direkt auch dem Kühldampf zugeführt werden kann. Damit kommt es zu einer thermodynamischen Kopplung und damit zu einem stetigen Fresh steam from the flow channel can thus be supplied directly to the cooling steam. This leads to a thermodynamic coupling and thus to a steady
Druckausgleich zwischen dem Frischdampfräum und dem Pressure equalization between the Frischdampfräum and the
Kühldampfräum der Turbine über diese Querverbindung. An die zusätzlichen Dichtelemente, die den thermisch hoch beanspruchten Bereich, wie beispielsweise den m den Stator eingreifenden Schubausgleichskolben des Rotors, von dem Cooling steam space of the turbine via this cross connection. To the additional sealing elements, which are the thermally high claimed area, such as the m the stator engaging thrust piston of the rotor, of the
Bereich mit Frischdampf abgrenzen, müssen somit nicht so hohe Anforderungen gestellt werden, da die Druckdifferenz zwischen beiden Räumen geringer ist. Therefore, it is not necessary to set such high demands on the area with live steam because the pressure difference between the two rooms is lower.
Mündet ein Ende der Druckausgleichsquerverbindung radial außen im Strömungskanal, so kann für den Druckausgleich im laufenden Betrieb der Turbine das radiale Druckgleichgewicht stromabwärts einer Schaufel ausgenutzt werden. Physikalisch besteht nämlich bei der im Strömungskanal erzeugten If one end of the pressure equalization transverse connection opens radially outward in the flow channel, the radial pressure balance downstream of a blade can be utilized for pressure equalization during operation of the turbine. Physically exists namely in the generated in the flow channel
drallbahafteten Strömung eine Druckdifferenz mit einem höheren statischen Druck an der radial äußeren Seite des Strömungskanals. Nach einer Leitschaufel wird somit das swirling flow a pressure difference with a higher static pressure on the radially outer side of the flow channel. After a vane is thus the
Statorinnengehäuse mit einem höheren Druck als der Rotor beaufschlagt. Dieser an der Druckausgleichsquerverbindung anliegende höhere Druck legt, über die Statorinnengehäuse subjected to a higher pressure than the rotor. This higher pressure applied to the pressure equalization cross connection lays over the
Druckausgleichsquerverbindung direkt, auch einen höheren Druck im Kühldampfräum fest. Somit kommt es auch bei einer Laständerung im laufenden Betrieb nicht zu einer lokalen Umkehrung der Strömungsrichtung. Zudem besteht für den Fall einer Turbinenschnellabschaltung mit der  Pressure equalization cross-connection directly, even a higher pressure in the cooling steam space fixed. Thus, even with a load change during operation, there is no local reversal of the flow direction. In addition, in the case of a turbine quick shutdown with the
Druckausgleichsquerverbindung, eine Raumverbindung zwischen Frischdampf und Kühldampf, durch welche ein  Pressure equalization cross-connection, a space connection between live steam and cooling steam through which a
Kühldampfüberschuss direkt entleert werden kann, so dass die Dichtelemente weniger beansprucht werden.  Cooling steam excess can be emptied directly, so that the sealing elements are less stressed.
Bevorzugt ist die Druckausgleichsquerverbindung im Preferably, the pressure equalization cross-connection is in
Innengehäuse des Stators und hier insbesondere nahe am Inner housing of the stator and here in particular close to
Einströmbereich des Strömungskanals angeordnet, so dass der lokal höchste Druck des Strömungskanals abgegriffen werden kann. Mündet die Druckausgleichsquerverbindung zudem nahe des thermisch hoch beanspruchten Bereichs in die Inflow region of the flow channel arranged so that the locally highest pressure of the flow channel can be tapped. In addition, the pressure equalization cross-connection in the near the thermally highly stressed area in the
KühldampfZuführung, können kurze Durchführungswege der Cooling steam supply, can short passageways of the
Druckausgleichsquerverbindung erreicht werden. Pressure equalization cross connection can be achieved.
Die Erfindung soll nun anhand einer Figur beispielhaft erläutert werden. Dargestellt ist der Schnitt durch eine Dampfturbine 1, mit einem Stator 2, mit Innengehäuse 21, mit Außengehäuse 22 und einem Rotor 3. Zwischen dem Stator 2 und dem Rotor 3 ist ein Strömungskanal 4 ausgebildet, in dem in axialer Richtung abwechselnd Laufschaufelreihen 33 des Rotors 3 und Leitschaufelreihen 23 des Stators 2 angeordnet sind. Über eine FrischdampfZuführung 5 wird Frischdampf einem The invention will now be explained by way of example by way of example. Shown is the section through a Steam turbine 1, with a stator 2, with inner housing 21, with outer housing 22 and a rotor 3. Between the stator 2 and the rotor 3, a flow channel 4 is formed, in which in the axial direction alternately blade rows 33 of the rotor 3 and stator blades 23 of the stator 2 are arranged. About a live steam supply 5 live steam is a
Einströmbereich 41 des Strömungskanals 4 zugeführt. Der so eingeströmte Frischdampf umströmt dann stromab im Inflow region 41 of the flow channel 4 is supplied. The so-streamed live steam then flows downstream in the
Strömungskanal 4 die Läufer- 33 und Leitschaufelreihen 23, expandiert und kühlt ab. Die dadurch freigesetzte thermische Energie bewirkt, dass sich der Rotor 3 dreht. Durch den sich nun im feststehenden Stator 2 drehenden Rotor 3 können lokal thermisch hoch belastete Bereiche 34 entstehen, die gekühlt werden müssen. So ein Bereich ist beispielsweise der am Rotor ausgebildete Schaubausgleichskolben 35, der sich durch den drehenden Rotor 3 in einer entsprechenden Ausnehmung des Stators 2 bewegt. Flow channel 4, the rotor 33 and Leitschaufelreihen 23, expands and cools. The thermal energy released thereby causes the rotor 3 to rotate. By now rotating in the fixed stator 2 rotor 3 locally thermally highly loaded areas 34 can arise, which must be cooled. Such a region is for example the Schaubausgleichskolben formed on the rotor 35, which moves through the rotating rotor 3 in a corresponding recess of the stator 2.
Zur Kühlung solcher thermisch hoch beanspruchten Bereiche 34 ist deshalb eine zusätzliche KühldampfZuführung 6 vorgesehen. Die KühldampfZuführung 6 umfasst im vorliegenden For cooling such thermally highly stressed areas 34, therefore, an additional cooling steam supply 6 is provided. The cooling steam supply 6 comprises in the present
Ausführungsbeispiel eine externe Zuleitung 61 von außen zum Außengehäuse 22, eine Außengehäusekühlbohrung 62, einen Embodiment, an external supply line 61 from the outside to the outer housing 22, a Außengehäusekühlbohrung 62, a
Strömungsraum 63 zwischen Außengehäuse 22 und Innengehäuse 21 und zumindest eine Innengehäusekühlbohrung 64. Die Flow space 63 between the outer housing 22 and the inner housing 21 and at least one Innengehäusekühlbohrung 64. The
Innenkühlbohrung 64 ist im Innengehäuse 21 angeordnet und stellt eine strömungstechnische Verbindung zwischen dem  Internal cooling hole 64 is disposed in the inner housing 21 and provides a fluidic connection between the
Strömungsraum 63 und einem Spaltraum dar, der zwischen dem Schubausgleichskolben 35 und dem Innengehäuse 21 angeordnet ist. Sowohl die KühldampfZuführung als auch die Flow space 63 and a gap space, which is arranged between the thrust balance piston 35 and the inner housing 21. Both the cooling steam supply and the
FrischdampfZuführung können, so wie in der Figur angedeutet, zusätzliche Ventile zum Steuern der jeweiligen Dampfmenge aufweisen. Zudem sind zur Trennung der beiden Dampfräume in der Turbine 1 an den Stellen, an denen der Frischdampfräum und Kühldampfräum besonders dicht beieinander liegen,  FrischdampfZuführung can, as indicated in the figure, have additional valves for controlling the respective amount of steam. In addition, to separate the two steam chambers in the turbine 1 at the points where the Frischdampfräum and Kühldampfräum are particularly close to each other,
zusätzliche (aber hier nicht näher dargestellte) additional (but not shown here)
Dichtelemente vorgesehen. Aufgrund des Druckunterschieds zwischen Kühl- und Frischdampf sind an diese Dichtelemente aber besonders hohe Anforderungen zu stellen. Andererseits müssen die Dichtelemente aber auch so ausgelegt sein, dass sie im Fall einer Schnellabschaltung „durchlässig" sind um einen Kühldampfüberschuss schnell abzubauen. Provided sealing elements. Due to the pressure difference between cooling and live steam are to these sealing elements but to set particularly high demands. On the other hand, the sealing elements must also be designed so that they are "permeable" in the case of an emergency shutdown to rapidly reduce a cooling steam surplus.
Um die Anforderungen an solche Dichtelemente so gering wie möglich zu halten ist daher erfindungsgemäß eine In order to keep the requirements of such sealing elements as low as possible is therefore according to the invention a
Druckausgleichsquerverbindung 7 zwischen dem Strömungskanal 4 und der KühldampfZuführung 6 vorgesehen. In dem in der Figur gezeigten Ausführungsbeispiel ist diese Querverbindung 7, nahe dem Einströmbereich 41, des Frischdampfes in den Pressure equalization transverse connection 7 between the flow channel 4 and the cooling steam supply 6 is provided. In the embodiment shown in the figure, this cross-connection 7, near the inflow region 41, of the live steam in the
Strömungskanal 4 und der thermisch hoch belasteten Zone 34 vorgesehen. Die Druckausgleichsquerverbindung 7, die Flow channel 4 and the thermally highly loaded zone 34 is provided. The pressure compensating transverse connection 7, the
beispielsweise als Bohrung im Innengehäuse 21 des Stators 2 ausgebildet ist ermöglicht so, dass ein Teil des For example, formed as a bore in the inner housing 21 of the stator 2 allows so that a part of the
Frischdampfes aus dem Strömungskanal 4 direkt dem Kühldampf zugeführt wird. So entsteht durch diese Querverbindung ein Druckausgleich zwischen Frischdampfräum und Kühldampfräum. Gleichzeitig kann die Querverbindung im Falle einer  Fresh steam from the flow channel 4 is fed directly to the cooling steam. This creates a pressure equalization between Frischdampfräum and Kühldampfräum through this cross-connection. At the same time, the cross connection in case of
Schnellabschaltung als „Bypass" genutzt werden und so Quick shutdown can be used as a "bypass" and so on
überschüssiges Kühlmittel aus dem Kühldampfräum in den Excess coolant from the cooling steam space in the
Frischdampfräum abzuführen. Insgesamt können so geringere Anforderungen an die Dichtelemente gestellt werden, was eine erhebliche Reduzierung der Materialkosten zur Folge hat. Remove fresh steam room. Overall, so lower demands on the sealing elements can be made, which has a significant reduction in material costs result.
Die vorliegende Erfindung ist nicht beschränkt auf die zuvor beschriebenen Ausführungen. Vielmehr sind auch Kombinationen, Abwandlungen bzw. Ergänzungen einzelner Merkmale denkbar, die zu weiteren möglichen Aus führungs formen der erfinderischen Idee führen können. So könnte die The present invention is not limited to the previously described embodiments. Rather, combinations, modifications or additions of individual features are conceivable that can lead to further possible imple mentation forms of the inventive idea. So could the
Druckausgleichsquerverbindung auch direkt in den von  Pressure equalization cross connection also directly in the of
Kühldampf beströmten thermisch hoch beanspruchten Bereich führen. Der Teil des Frischdampfes aus dem Strömungskanal würde dann erst in diesem Bereich dem Kühldampf zugeführt. Die Druckausgleichsquerverbindung kann, wie in der Figur angedeutet, aus einem radial und einen axial ausgerichteten Bereich bestehen, sie könnte aber auch als eine gerade Bohrung schräg durch das Innengehäuse vom Strömungs kanal zur Innengehäusekühlbohrung führen . Cooling steam flowed thermally highly stressed area lead. The part of the live steam from the flow channel would then be supplied to the cooling steam only in this area. The pressure equalizing cross-connection, as indicated in the figure, consist of a radially and an axially aligned region, but it could also be as a straight Bore obliquely through the inner housing from the flow channel to the inner housing cooling bore lead.

Claims

Patentansprüche claims
1. Dampfturbine (1) mit einem Stator (2), welcher ein Innen- (21) und ein Außengehäuse (22) umfasst, einem Rotor (3), einem zwischen Stator (2) und Rotor (3) ausgebildeten A steam turbine (1) comprising a stator (2) comprising an inner (21) and an outer casing (22), a rotor (3), a stator (2) and rotor (3)
Strömungskanal ( 4 ) , in dem abwechselnd Laufschaufelreihen (33) des Rotors (3) und Leitschaufelreihen (23) des Stators (2) angeordnet sind, einer FrischdampfZuführung (5) zum Zuführen von Frischdampf in einen Einströmbereich (41) des  Flow channel (4) in which alternately blade rows (33) of the rotor (3) and stator rows (23) of the stator (2) are arranged, a live steam supply (5) for supplying live steam in an inflow region (41) of the
Strömungskanals (4), so dass der Frischdampf die Läufer- (33) und Leitschaufeln (21) im Strömungskanal (4) umströmen kann und einer KühldampfZuführung (6) zum Zuführen von Kühldampf in einen thermisch hoch beanspruchten Bereich (34) des Rotors (3) Flow channel (4), so that the live steam, the rotor (33) and vanes (21) in the flow channel (4) can flow around and a cooling steam supply (6) for supplying cooling steam in a thermally highly stressed region (34) of the rotor (3 )
mit einer Druckausgleichsquerverbindung (7) zwischen dem Strömungskanal (4) und der KühldampfZuführung (6), with a pressure compensation transverse connection (7) between the flow channel (4) and the cooling steam feed (6),
wobei die KühldampfZuführung (6) eine Zuleitung (61) zum Außengehäuse (22), eine Außengehäusekühlbohrung (62), einen Strömungsraum (63) zwischen Außen- und Innengehäuse und zumindest eine Innengehäusekühlbohrung (64) umfasst und die Druckausgleichsquerverbindung (7) eine Bohrung im wherein the cooling steam supply (6) comprises a feed line (61) to the outer housing (22), a Außengehäusekühlbohrung (62), a flow space (63) between the outer and inner housing and at least one inner housing cooling bore (64) and the pressure compensating transverse connection (7) has a bore in the
Innengehäuse (21) ist, die vom Strömungskanal (4) zu der Innengehäusekühlbohrung (64) reicht, Inner housing (21) which extends from the flow channel (4) to the Innengehäusekühlbohrung (64),
wobei die Druckausgleichsquerverbindung (7) im Bereich des Einströmbereichs (41) des Strömungskanals (4) und des wherein the pressure compensation transverse connection (7) in the region of the inflow region (41) of the flow channel (4) and the
thermisch beanspruchten Bereichs (34) im Innengehäuse (21) ausgebildet ist., thermally stressed region (34) in the inner housing (21) is formed.,
d a d u r c h g e k e n n z e i c h n e t , d a s s d a d u r c h e s e n c i n e s, d a s s
die Innenkühlbohrung (64) im Innengehäuse (21) angeordnet ist und eine strömungstechnische Verbindung zwischen dem the inner cooling bore (64) in the inner housing (21) is arranged and a fluidic connection between the
Strömungsraum (63) und einem Spaltraum, der zwischen dem Rotor (3) und dem Innengehäuse (21) angeordnet ist,  Flow space (63) and a gap space, which is arranged between the rotor (3) and the inner housing (21),
herstellt . produces.
2. Dampfturbine nach Anspruch 1, 2. Steam turbine according to claim 1,
d a d u r c h g e k e n n z e i c h n e t , d a s s d a d u r c h e s e n c i n e s, d a s s
Druckausgleichsquerverbindung (7) radial außen am Pressure equalization transverse connection (7) radially on the outside
Strömungskanal (4) ansetzt. Flow channel (4) attaches.
3. Dampfturbine nach Anspruch 1 oder 2, 3. Steam turbine according to claim 1 or 2,
d a d u r c h g e k e n n z e i c h n e t , d a s s der thermisch beanspruchte Bereich (34) ein In other words, the thermally stressed area (34) is one of them
Schubausgleichskolben (35) des Rotors (3) ist. Thrust piston (35) of the rotor (3) is.
4. Verfahren zum Kühlen einer Dampfturbine (1), wobei der Dampfturbine (1) Frischdampf zum Durchströmen eines zwischen einem Stator (2) und einem Rotor (3) ausgebildeten 4. A method for cooling a steam turbine (1), wherein the steam turbine (1) live steam for flowing through between a stator (2) and a rotor (3) formed
Strömungskanals (4) und Kühldampf zum Kühlen eines thermisch beanspruchten Bereichs (34) des Rotors (3) zugeführt wird, d a d u r c h g e k e n n z e i c h n e t , d a s s ein Teil des Frischdampfes aus dem Strömungskanal (4) dem Kühldampf zugeführt wird. Flow channel (4) and cooling steam for cooling a thermally stressed portion (34) of the rotor (3) is supplied, d a d u r c h e c e n e c e s, a part of the live steam from the flow channel (4) is fed to the cooling steam.
5. Verfahren nach Anspruch 4, 5. The method according to claim 4,
d a d u r c h g e k e n n z e i c h n e t , d a s s die Zuführung des Frischdampfs aus dem Strömungskanal (4) im Bereich des Einströmbereichs (41) des Strömungskanals (4) und dem thermisch beanspruchten Bereich (34) des Rotors (3) im Innengehäuse (21) des Stators (2) erfolgt. The supply of live steam from the flow channel (4) in the region of the inflow region (41) of the flow channel (4) and the thermally stressed region (34) of the rotor (3) in the inner housing (21) of the stator (2) takes place.
EP11740595.1A 2010-07-30 2011-07-18 Steam turbine and process for cooling such a steam turbine Not-in-force EP2598724B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11740595.1A EP2598724B1 (en) 2010-07-30 2011-07-18 Steam turbine and process for cooling such a steam turbine

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Application Number Priority Date Filing Date Title
EP10171447A EP2412937A1 (en) 2010-07-30 2010-07-30 Steam turbine and method for cooling same
EP11740595.1A EP2598724B1 (en) 2010-07-30 2011-07-18 Steam turbine and process for cooling such a steam turbine
PCT/EP2011/062251 WO2012013531A1 (en) 2010-07-30 2011-07-18 Steam turbine and process for cooling such a steam turbine

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EP2598724B1 EP2598724B1 (en) 2014-06-04

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CN109184823B (en) * 2018-11-06 2024-03-19 上海电气电站设备有限公司 Steam turbine with steam supplementing structure and operation method thereof
CN109826675A (en) * 2019-03-21 2019-05-31 上海电气电站设备有限公司 Steam turbine cooling system and method

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JP4064532B2 (en) * 1998-06-05 2008-03-19 三菱重工業株式会社 Steam turbine outer casing cooling structure
EP1445427A1 (en) * 2003-02-05 2004-08-11 Siemens Aktiengesellschaft Steam turbine and method of operating a steam turbine
EP1674669A1 (en) * 2004-12-21 2006-06-28 Siemens Aktiengesellschaft Method of cooling a steam turbine
EP1785586B1 (en) * 2005-10-20 2014-05-07 Siemens Aktiengesellschaft Rotor of a turbomachine
EP1780376A1 (en) * 2005-10-31 2007-05-02 Siemens Aktiengesellschaft Steam turbine
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CN103052768B (en) 2015-07-22
JP5604684B2 (en) 2014-10-15
EP2412937A1 (en) 2012-02-01
JP2013531182A (en) 2013-08-01
CN103052768A (en) 2013-04-17
WO2012013531A1 (en) 2012-02-02
EP2598724B1 (en) 2014-06-04

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