EP2565401A1 - Method for temperature balance in a steam turbine - Google Patents

Method for temperature balance in a steam turbine Download PDF

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Publication number
EP2565401A1
EP2565401A1 EP11180026A EP11180026A EP2565401A1 EP 2565401 A1 EP2565401 A1 EP 2565401A1 EP 11180026 A EP11180026 A EP 11180026A EP 11180026 A EP11180026 A EP 11180026A EP 2565401 A1 EP2565401 A1 EP 2565401A1
Authority
EP
European Patent Office
Prior art keywords
sealing
housing
outer housing
steam turbine
steam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11180026A
Other languages
German (de)
French (fr)
Inventor
Daniel Gloss
Frank Deister
Ingo Förster
Christian Musch
Heinrich STÜER
Frank Truckenmüller
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 EP11180026A priority Critical patent/EP2565401A1/en
Priority to JP2014527568A priority patent/JP5837204B2/en
Priority to PCT/EP2012/065215 priority patent/WO2013034377A1/en
Priority to US14/241,273 priority patent/US9416684B2/en
Priority to EP12745820.6A priority patent/EP2723996B1/en
Priority to CN201280043198.0A priority patent/CN103764956B/en
Publication of EP2565401A1 publication Critical patent/EP2565401A1/en
Priority to JP2015097255A priority patent/JP5996717B2/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
    • F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • F01K13/025—Cooling the interior by injection during idling or stand-by
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
    • F01K7/165—Controlling means specially adapted therefor
    • 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

Definitions

  • the invention relates to a steam turbine comprising an outer housing, an inner housing disposed within the outer housing and a rotatably mounted within the inner rotor, wherein a gap is formed between the inner housing and the outer housing, wherein between the outer housing and the rotor, a sealing vapor seal is formed.
  • the invention relates to a method for avoiding a housing bend of a steam turbine.
  • the turbine housing of a steam turbine generally comprises an inner housing and an outer housing, wherein a gap is formed between the inner housing and the outer housing. These two housing parts in turn have an upper half and a lower half, in high-pressure turbines, the outer housing is designed as a pot design. In particular, after switching off the steam turbine occur on and between the housings temperature differences, which may be several Kelvin between the lower half and the relatively hot surface.
  • steam turbines have an inner housing and an outer housing surrounding the inner housing, wherein a gap is formed by this double-shell housing construction.
  • the inner housing is at least partially encased in its axial extent by a casing, which is arranged in the intermediate space.
  • a steam turbine After a shutdown or a load shedding a steam turbine is in the space between the inner and outer housing a certain amount of steam, which is dependent on the prevailing pressure. Natural convection creates a temperature stratification between the upper and the lower area in the housing or in the intermediate space. These different temperatures lead to a curvature of the outer housing, which is also referred to as humping. This so-called humping is to avoid, since the inner housing rests in the outer housing and it can lead to a displacement of the inner housing relative to the rotor as a result of the curvature, resulting in the worst case to bridging the radial play and evt1. a rubbing result.
  • the invention has for its object to prevent curvature of the outer casing, in particular when cooling the turbine, or at least to keep low. Furthermore, a method for avoiding a housing distortion when switching off the turbine should be specified.
  • the first object is achieved by a steam turbine comprising an outer housing, an inner housing disposed within the outer housing and a rotatably mounted within the inner housing rotor, wherein between the Inner housing and the outer housing, a gap is formed, wherein between the outer housing and the rotor, a sealing vapor seal is formed, wherein the outer housing has an inflow opening for flowing from the sealing vapor in the intermediate space.
  • the object directed to a method according to the invention is achieved by a method for preventing a housing bending of a steam turbine when switching off the steam turbine, wherein in a space formed between an inner housing and an outer housing surrounding the outer housing, a forced turbulence of the medium located in the intermediate space by an influx of Sealing vapor via an opening in the outer housing in the intermediate space.
  • the invention is based on the consideration that a formation of temperature layers in the intermediate space is avoided by the injection of sealing vapor. This leads to a turbulence of the layers and thus to a reduction in the thermal stresses, which in turn reduces the curvature of the outer housing.
  • the inflow opening is fluidically connected to the sealing vapor seal, which is a relatively inexpensive solution.
  • a sealing steam line is formed which, on the one hand, allows inflow to the sealing vapor seal with sealing vapor and, moreover, has a branch, which is fluidically connected to the inflow opening.
  • FIG. 1 shows a steam turbine 1 shown in cross-sectional view, comprising an outer housing 2 and an inner housing 3 disposed within the outer housing 2.
  • a rotor 4 is rotatably mounted about a rotation axis 5.
  • a gap 6 is formed between the inner housing 3 and the outer housing 4, a gap 6 is formed.
  • the inner housing 3 and the outer housing 2 can each be divided into a first, upper portion, the upper half, and in a second, lower portion, the lower half.
  • the steam turbine 1 further has a sealing region 7, which separates an outer space 8 from an inner space 9 of the steam turbine 1.
  • the sealing region 7 has a sealing steam opening 10, which is designed such that a cold sealing steam, which can be supplied externally, can flow into a gap between the outer housing 2 and the rotor 4.
  • Wrasendampfabsaugungen 11 With the help of so-called Wrasendampfabsaugungen 11, a mixed steam is sucked off again.
  • the outer housing 2 has an inflow opening 13 for the flow of sealing vapor into the intermediate space 6.
  • the vapor in the gap 6 is swirled by the inflowing sealing vapor via the inflow opening 13, which thus increases the natural convection in the intermediate space 6 and thereby avoids buckling of the outer housing 2.
  • the inflow opening 13 is fluidically connected to the sealing steam opening 10.
  • FIG. 2 shows a seen in the rotational axis direction 5 cross-section of the steam turbine 1 on.
  • the inflow opening 13 is arranged in a 12:00 o'clock position in the outer housing 2.
  • FIG. 1 shows a sealing steam line 14, in which sealing steam is formed in a sealing space between sealing vapor seal 12 and rotor 4.
  • the sealing steam line 14 is shown in dashed lines. On a representation of the sealing steam line for the others in the FIG. 1 shown sealing steam openings 10 has been omitted for reasons of clarity.
  • the sealing steam line 14 comprises a branch 16, which is fluidically connected to the inflow opening 13. To regulate the sealing steam flow in the branch 16, a valve 17 is arranged.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

The steam turbine (1) has an outer housing (2), an inner housing (3) and a rotor (4) that is rotatbly supported within the inner housing, where the inner housing is arranged within the outer housing. A steam barrier seal (12) is formed between the outer housing and the rotor. The outer housing has an inlet opening (13) for blocking the steam barrier in an intermediate chamber (6). The inlet opening is fluidically connected with the steam barrier seal. An independent claim is included for a method for avoiding a housing distortion of a steam turbine during switching-off of the steam turbine.

Description

Die Erfindung betrifft eine Dampfturbine umfassend ein Außengehäuse, ein innerhalb des Außengehäuses angeordnetes Innengehäuse und einen innerhalb des Innengehäuses drehbar gelagerten Rotor, wobei zwischen dem Innengehäuse und dem Außengehäuse ein Zwischenraum ausgebildet ist, wobei zwischen dem Außengehäuse und dem Rotor eine Sperrdampfdichtung ausgebildet ist.The invention relates to a steam turbine comprising an outer housing, an inner housing disposed within the outer housing and a rotatably mounted within the inner rotor, wherein a gap is formed between the inner housing and the outer housing, wherein between the outer housing and the rotor, a sealing vapor seal is formed.

Des Weiteren betrifft die Erfindung ein Verfahren zur Vermeidung einer Gehäuseverkrümmung einer Dampfturbine.Furthermore, the invention relates to a method for avoiding a housing bend of a steam turbine.

Das Turbinengehäuse einer Dampfturbine umfasst in der Regel ein Innengehäuse und ein Außengehäuse, wobei zwischen dem Innengehäuse und dem Außengehäuse ein Zwischenraum ausgebildet ist. Diese beiden Gehäuseteile weisen wiederum eine Oberhälfte und eine Unterhälfte auf, bei Hochdruckturbinen ist das Außengehäuse auch als Topfdesign ausgeführt. Insbesondere nach dem Abschalten der Dampfturbine treten an und zwischen den Gehäusen Temperaturdifferenzen auf, die zwischen der Unterhälfte und der vergleichsweise heißen Oberfläche mehrere Kelvin betragen können.The turbine housing of a steam turbine generally comprises an inner housing and an outer housing, wherein a gap is formed between the inner housing and the outer housing. These two housing parts in turn have an upper half and a lower half, in high-pressure turbines, the outer housing is designed as a pot design. In particular, after switching off the steam turbine occur on and between the housings temperature differences, which may be several Kelvin between the lower half and the relatively hot surface.

Wird die Dampfturbine abgeschaltet, so kühlt das Außengehäuse schneller aus als das Innengehäuse. Dadurch wird infolge freier oder natürlicher Konvektion (Naturkonvektion) im Zwischenraum zwischen dem Innengehäuse und dem Außengehäuse eine Auftriebsströmung induziert, die einen Wärmeeintrag in die Oberhälfte des Außengehäuses bewirkt. Dies wiederum kann zu einer Gehäusekrümmung insbesondere in der Oberhälfte des Außengehäuses führen, mit der Folge, dass dort unerwünschte Spannungen des Gehäusematerials und Spielüberbrückungen entstehen. Eine Verkrümmung des Innengehäuses kann zu unerwünschten Anstreifschäden führen, wenn in ungünstigen Fällen Turbinenschaufeln das Gehäuse streifen.When the steam turbine is switched off, the outer housing cools faster than the inner housing. As a result, a buoyancy flow is induced due to free or natural convection (natural convection) in the space between the inner housing and the outer housing, which causes a heat input into the upper half of the outer housing. This in turn can lead to a housing curvature, in particular in the upper half of the outer housing, with the result that unwanted stresses of the housing material and Spielüberbrückungen arise there. A curvature of the inner housing may be undesirable Rubbing damage can occur if, in unfavorable cases, turbine blades strike the housing.

In der Regel weisen Dampfturbinen ein Innengehäuse und ein das Innengehäuse umgebendes Außengehäuse auf, wobei durch diese Doppel-Mantel-Gehäusekonstruktion ein Zwischenraum gebildet ist. Das Innengehäuse ist in seiner axialen Erstreckung zumindest teilweise von einer Verschalung ummantelt, welche im Zwischenraum angeordnet ist.In general, steam turbines have an inner housing and an outer housing surrounding the inner housing, wherein a gap is formed by this double-shell housing construction. The inner housing is at least partially encased in its axial extent by a casing, which is arranged in the intermediate space.

Nach einem Abfahren oder einem Lastabwurf einer Dampfturbine ist im Raum zwischen dem Innen- und Außengehäuse eine bestimmte Menge Dampf, was abhängig ist vom herrschenden Druck. Durch natürliche Konvektion entsteht eine Temperaturschichtung zwischen dem oberen und dem unteren Bereich im Gehäuse bzw. im Zwischenraum. Diese unterschiedlichen Temperaturen führen zu einer Verkrümmung des Außengehäuses, was auch als Buckeln bezeichnet wird. Dieses sogenannte Buckeln gilt es zu vermeiden, da das Innengehäuse im Außengehäuse aufliegt und es in Folge der Verkrümmung zu einer Verlagerung des Innengehäuses gegenüber dem Rotor führen kann, was im schlimmsten Fall zu einer Überbrückung der Radialspiele führt und evt1. ein Anstreifen zur Folge hat.After a shutdown or a load shedding a steam turbine is in the space between the inner and outer housing a certain amount of steam, which is dependent on the prevailing pressure. Natural convection creates a temperature stratification between the upper and the lower area in the housing or in the intermediate space. These different temperatures lead to a curvature of the outer housing, which is also referred to as humping. This so-called humping is to avoid, since the inner housing rests in the outer housing and it can lead to a displacement of the inner housing relative to the rotor as a result of the curvature, resulting in the worst case to bridging the radial play and evt1. a rubbing result.

Bisher wurde dieses Problem dadurch gelöst, dass ein genügend großes Radialspiel berücksichtigt wurde. Allerdings wird dadurch eine Verschlechterung des Wirkungsgrades hervorgerufen.So far, this problem has been solved by taking into account a sufficiently large radial play. However, this causes a deterioration of the efficiency.

Der Erfindung liegt die Aufgabe zugrunde, eine Verkrümmung des Außengehäuses, insbesondere beim Abkühlen der Turbine, zu verhindern oder zumindest gering zu halten. Des Weiteren soll ein Verfahren zur Vermeidung einer Gehäuseverkrümmung beim Abschalten der Turbine angegeben werden.The invention has for its object to prevent curvature of the outer casing, in particular when cooling the turbine, or at least to keep low. Furthermore, a method for avoiding a housing distortion when switching off the turbine should be specified.

Die erstgenannte Aufgabe wird erfindungsgemäß gelöst durch eine Dampfturbine umfassend ein Außengehäuse, ein innerhalb des Außengehäuse angeordnetes Innengehäuse und ein innerhalb des Innengehäuse drehbar gelagerten Rotor, wobei zwischen dem Innengehäuse und dem Außengehäuse ein Zwischenraum ausgebildet ist, wobei zwischen dem Außengehäuse und dem Rotor eine Sperrdampfdichtung ausgebildet ist, wobei das Außengehäuse ein Zuströmöffnung zum Zuströmen vom Sperrdampf in den Zwischenraum aufweist.The first object is achieved by a steam turbine comprising an outer housing, an inner housing disposed within the outer housing and a rotatably mounted within the inner housing rotor, wherein between the Inner housing and the outer housing, a gap is formed, wherein between the outer housing and the rotor, a sealing vapor seal is formed, wherein the outer housing has an inflow opening for flowing from the sealing vapor in the intermediate space.

Die auf ein Verfahren gerichtete Aufgabe wird erfindungsgemäß gelöst durch ein Verfahren zur Vermeidung einer Gehäuseverkrümmung einer Dampfturbine beim Abschalten der Dampfturbine, bei dem in einem zwischen einem Innengehäuse und einem das Innengehäuse umgebenden Außengehäuse gebildeten Zwischenraum eine erzwungene Verwirbelung des im Zwischenraum befindlichen Mediums durch ein Zuströmen von Sperrdampf über eine Öffnung im Außengehäuse in den Zwischenraum.The object directed to a method according to the invention is achieved by a method for preventing a housing bending of a steam turbine when switching off the steam turbine, wherein in a space formed between an inner housing and an outer housing surrounding the outer housing, a forced turbulence of the medium located in the intermediate space by an influx of Sealing vapor via an opening in the outer housing in the intermediate space.

Vorteilhafte Weiterbildungen sind in den Unteransprüchen angegeben.Advantageous developments are specified in the subclaims.

Die Erfindung geht dabei von der Überlegung aus, dass eine Ausbildung von Temperaturschichten im Zwischenraum vermieden wird durch das Eindüsen von Sperrdampf. Dies führt zu einer Verwirbelung der Schichten und somit zu einer Verringerung der thermischen Spannungen, was wiederum die Verkrümmung des Außengehäuses reduziert.The invention is based on the consideration that a formation of temperature layers in the intermediate space is avoided by the injection of sealing vapor. This leads to a turbulence of the layers and thus to a reduction in the thermal stresses, which in turn reduces the curvature of the outer housing.

In einer ersten vorteilhaften Weiterbildung wird die Zuströmöffnung strömungstechnisch mit der Sperrdampfdichtung verbunden, was eine vergleichsweise kostengünstige Lösung ist.In a first advantageous embodiment, the inflow opening is fluidically connected to the sealing vapor seal, which is a relatively inexpensive solution.

Vorteilhafterweise wird eine Sperrdampfleitung ausgebildet, die zum einen eine Zuströmung zur Sperrdampfdichtung mit Sperrdampf ermöglicht und des Weiteren eine Abzweigung aufweist, die mit der Zuströmöffnung strömungstechnisch verbunden ist.Advantageously, a sealing steam line is formed which, on the one hand, allows inflow to the sealing vapor seal with sealing vapor and, moreover, has a branch, which is fluidically connected to the inflow opening.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand einer schematischen Zeichnung näher erläutert.An embodiment of the invention will be explained in more detail with reference to a schematic drawing.

Es zeigen:

FIG 1
Querschnittsansicht einer Dampfturbine,
FIG 2
Querschnittansicht einer Dampfturbine in Strömungsrichtung gesehen.
Show it:
FIG. 1
Cross-sectional view of a steam turbine,
FIG. 2
Cross-sectional view of a steam turbine seen in the flow direction.

Die FIG 1 zeigt eine in Querschnittsansicht dargestellte Dampfturbine 1, die ein Außengehäuse 2 und ein innerhalb des Außengehäuses 2 angeordnetes Innengehäuse 3 umfasst. Innerhalb des Innengehäuses 3 ist ein Rotor 4 um eine Rotationsachse 5 drehbar gelagert. Zwischen dem Innengehäuse 3 und dem Außengehäuse 4 ist ein Zwischenraum 6 ausgebildet. Das Innengehäuse 3 und das Außengehäuse 2 lassen sich jeweils in einen ersten, oberen Teilbereich, die Oberhälfte, sowie in einen zweiten, unteren Teilbereich, die Unterhälfte, aufteilen.The FIG. 1 shows a steam turbine 1 shown in cross-sectional view, comprising an outer housing 2 and an inner housing 3 disposed within the outer housing 2. Within the inner housing 3, a rotor 4 is rotatably mounted about a rotation axis 5. Between the inner housing 3 and the outer housing 4, a gap 6 is formed. The inner housing 3 and the outer housing 2 can each be divided into a first, upper portion, the upper half, and in a second, lower portion, the lower half.

Die Dampfturbine 1 weist des Weiteren einen Dichtungsbereich 7 auf, der einen Außenraum 8 von einem Innenraum 9 der Dampfturbine 1 trennt. Zwischen dem Rotor und dem Außengehäuse 2 im Dichtungsbereich 7 sollte keine strömungstechnische Verbindung erfolgen. Dazu weist der Dichtungsbereich 7 eine Sperrdampföffnung 10 auf, die derart ausgebildet ist, dass ein kalter Sperrdampf, der von extern zugeführt werden kann, in einen Spalt zwischen dem Außengehäuse 2 und dem Rotor 4 strömen kann. Mit Hilfe sogenannter Wrasendampfabsaugungen 11, wird ein Mischdampf wieder abgesaugt.The steam turbine 1 further has a sealing region 7, which separates an outer space 8 from an inner space 9 of the steam turbine 1. There should be no fluidic connection between the rotor and the outer housing 2 in the sealing area 7. For this purpose, the sealing region 7 has a sealing steam opening 10, which is designed such that a cold sealing steam, which can be supplied externally, can flow into a gap between the outer housing 2 and the rotor 4. With the help of so-called Wrasendampfabsaugungen 11, a mixed steam is sucked off again.

Zwischen dem Außengehäuse 2 und dem Rotor 4 ist somit eine Sperrdampfdichtung 12 ausgebildet. Das Außengehäuse 2 weist eine Zuströmöffnung 13 zum Zuströmen von Sperrdampf in den Zwischenraum 6 auf. Somit wird der im Zwischenraum 6 befindliche Dampf durch den einströmenden Sperrdampf über die Zuströmöffnung 13 verwirbelt, was somit die natürliche Konvektion im Zwischenraum 6 erhöht und dadurch ein Buckeln des Außengehäuses 2 vermeidet.Between the outer casing 2 and the rotor 4, a sealing vapor seal 12 is thus formed. The outer housing 2 has an inflow opening 13 for the flow of sealing vapor into the intermediate space 6. Thus, the vapor in the gap 6 is swirled by the inflowing sealing vapor via the inflow opening 13, which thus increases the natural convection in the intermediate space 6 and thereby avoids buckling of the outer housing 2.

Die Zuströmöffnung 13 ist strömungstechnisch mit der Sperrdampföffnung 10 verbunden.The inflow opening 13 is fluidically connected to the sealing steam opening 10.

Die FIG 2 zeigt einen in Rotationsachsenrichtung 5 gesehenen Querschnitt der Dampfturbine 1 auf. In dem in FIG 2 dargestellten Ausführungsbeispiel ist die Zuströmöffnung 13 in einer 12:00 Uhr Position im Außengehäuse 2 angeordnet.The FIG. 2 shows a seen in the rotational axis direction 5 cross-section of the steam turbine 1 on. In the in FIG. 2 illustrated embodiment, the inflow opening 13 is arranged in a 12:00 o'clock position in the outer housing 2.

Die FIG 1 zeigt eine Sperrdampfleitung 14, in der Sperrdampf in einem Dichtraum zwischen Sperrdampfdichtung 12 und Rotor 4 ausgebildet ist.The FIG. 1 shows a sealing steam line 14, in which sealing steam is formed in a sealing space between sealing vapor seal 12 and rotor 4.

Die Sperrdampfleitung 14 ist gestrichelt dargestellt. Auf eine Darstellung der Sperrdampfleitung für die weiteren in der FIG 1 gezeigten Sperrdampföffnungen 10 wurde aus Gründen der Übersichtlichkeit verzichtet.The sealing steam line 14 is shown in dashed lines. On a representation of the sealing steam line for the others in the FIG. 1 shown sealing steam openings 10 has been omitted for reasons of clarity.

Die Sperrdampfleitung 14 umfasst eine Abzweigung 16, die strömungstechnisch mit der Zuströmöffnung 13 verbunden ist. Zur Regulierung des Sperrdampfstroms in der Abzweigung 16 ist ein Ventil 17 angeordnet.The sealing steam line 14 comprises a branch 16, which is fluidically connected to the inflow opening 13. To regulate the sealing steam flow in the branch 16, a valve 17 is arranged.

Durch die infolge der über die Zuströmöffnung 13 erzwungene Verwirbelung des im Zwischenraum 6 befindlichen Dampfes bewirkte Vergleichmäßigung der Temperaturverteilung im Außengehäuse 2 wird somit der Naturkonvektion derart entgegengewirkt, dass Gehäuseverkrümmungen nach dem Abschalten beim Abkühlen der Turbine zuverlässig verhindert sind.As a result of the forced through the inflow opening 13 turbulence of the vapor located in the gap 6 equalization of the temperature distribution in the outer housing 2 of the natural convection is thus counteracted that Gehäuseverkrümmungen are reliably prevented after switching off the cooling of the turbine.

Claims (7)

Dampfturbine (1)
umfassend ein Außengehäuse (2), ein innerhalb des Außengehäuse (2) angeordnetes Innengehäuse (3) und einen innerhalb des Innengehäuse (3) drehbar gelagerten Rotor (4),
wobei zwischen dem Innengehäuse (3) und dem Außengehäuse (2) ein Zwischenraum (6) ausgebildet ist,
wobei zwischen dem Außengehäuse (2) und dem Rotor (4) eine Sperrdampfdichtung (12) ausgebildet ist,
wobei das Außengehäuse (2) eine Zuströmöffnung (13) zum Zuströmen von Sperrdampf in den Zwischenraum (6) aufweist.Steam turbine (1)
comprising an outer housing (2), an inner housing (3) arranged inside the outer housing (2) and a rotor (4) rotatably mounted inside the inner housing (3),
wherein between the inner housing (3) and the outer housing (2), a gap (6) is formed,
wherein between the outer housing (2) and the rotor (4) a sealing vapor seal (12) is formed,
wherein the outer housing (2) has an inflow opening (13) for the flow of sealing vapor into the intermediate space (6). Dampfturbine (1) nach Anspruch 1,
wobei die Zuströmöffnung (13) strömungstechnisch mit der Sperrdampfdichtung (12) verbunden ist.Steam turbine (1) according to claim 1,
wherein the inflow opening (13) is fluidically connected to the sealing vapor seal (12). Dampfturbine (1) nach Anspruch 1 oder 2,
mit einer Sperrdampfleitung (13), die zum Führen von Sperrdampf in einem Dichtungsraum (7) zwischen Sperrdampfdichtung (12) und Rotor (4) ausgebildet ist.Steam turbine (1) according to claim 1 or 2,
with a sealing steam line (13), which is designed to guide sealing steam in a sealing space (7) between sealing vapor seal (12) and rotor (4). Dampfturbine (1) nach Anspruch 3,
wobei die Sperrdampfleitung (14) eine Abzweigung (16) aufweist, die mit der Zuströmöffnung (13) strömungstechnisch verbunden ist.Steam turbine (1) according to claim 3,
wherein the sealing steam line (14) has a branch (16), which is fluidically connected to the inflow opening (13). Dampfturbine nach Anspruch 4,
wobei die Abzweigung (16) ein Ventil (17) umfasst.Steam turbine according to claim 4,
wherein the branch (16) comprises a valve (17). Verfahren zur Vermeidung einer Gehäuseverkrümmung einer Dampfturbine (1) beim Abschalten der Dampfturbine,
bei dem in einem zwischen einem Innengehäuse (3) und einem das Innengehäuse (3) umgebende Außengehäuse (2) gebildeten Zwischenraum (6) eine erzwungene Verwirbelung des im Zwischenraum (6) befindlichen Mediums durch ein Zuströmen von Sperrdampf über eine Öffnung (13)im Außengehäuse (2) in den Zwischenraum (6) erfolgt.Method for avoiding a housing bend of a steam turbine (1) when switching off the steam turbine,
in the intermediate space (6) formed between an inner housing (3) and an outer housing (2) surrounding the inner housing (3), forced vortexing of the medium in the intermediate space (6) by inflow of sealing vapor via an opening (13) in FIG Outer housing (2) in the intermediate space (6). Verfahren nach Anspruch 6,
wobei der Sperrdampf aus einer Sperrdampfleitung (14), die Sperrdampf zur Sperrdampfdichtung (12) führt, abgezweigt wird.Method according to claim 6,
wherein the sealing steam is branched off from a sealing steam line (14) which conducts sealing steam to the sealing vapor seal (12).
EP11180026A 2011-09-05 2011-09-05 Method for temperature balance in a steam turbine Withdrawn EP2565401A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP11180026A EP2565401A1 (en) 2011-09-05 2011-09-05 Method for temperature balance in a steam turbine
JP2014527568A JP5837204B2 (en) 2011-09-05 2012-08-03 Method for temperature compensation of steam turbine
PCT/EP2012/065215 WO2013034377A1 (en) 2011-09-05 2012-08-03 Method for a temperature compensation in a steam turbine
US14/241,273 US9416684B2 (en) 2011-09-05 2012-08-03 Method for a temperature compensation in a steam turbine
EP12745820.6A EP2723996B1 (en) 2011-09-05 2012-08-03 Method for temperature balance in a steam turbine
CN201280043198.0A CN103764956B (en) 2011-09-05 2012-08-03 For carrying out the method for temperature correction in steam turbine
JP2015097255A JP5996717B2 (en) 2011-09-05 2015-05-12 Method for temperature compensation of steam turbine

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EP11180026A EP2565401A1 (en) 2011-09-05 2011-09-05 Method for temperature balance in a steam turbine

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US11181041B2 (en) * 2017-02-02 2021-11-23 General Electric Company Heat recovery steam generator with electrical heater system and method

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JP5996717B2 (en) 2016-09-21
CN103764956B (en) 2015-11-25
CN103764956A (en) 2014-04-30
WO2013034377A1 (en) 2013-03-14
JP2015148232A (en) 2015-08-20
JP5837204B2 (en) 2015-12-24
EP2723996B1 (en) 2019-10-16
EP2723996A1 (en) 2014-04-30
US20140366538A1 (en) 2014-12-18
JP2014525538A (en) 2014-09-29

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