EP1865155B1 - Turbine casing for a steam turbine and/or a gas turbine and production method thereof - Google Patents

Turbine casing for a steam turbine and/or a gas turbine and production method thereof Download PDF

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Publication number
EP1865155B1
EP1865155B1 EP20060011628 EP06011628A EP1865155B1 EP 1865155 B1 EP1865155 B1 EP 1865155B1 EP 20060011628 EP20060011628 EP 20060011628 EP 06011628 A EP06011628 A EP 06011628A EP 1865155 B1 EP1865155 B1 EP 1865155B1
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EP
European Patent Office
Prior art keywords
turbine
metallic material
turbine casing
cast iron
alloy metallic
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.)
Not-in-force
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EP20060011628
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German (de)
French (fr)
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EP1865155A1 (en
Inventor
Lutz Lender
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Siemens AG
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Siemens AG
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Priority to EP20060011628 priority Critical patent/EP1865155B1/en
Publication of EP1865155A1 publication Critical patent/EP1865155A1/en
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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
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • F01D25/005—Selecting particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0466—Nickel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/32—Application in turbines in gas 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
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/21—Manufacture essentially without removing material by casting
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/13—Refractory metals, i.e. Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W
    • F05D2300/131—Molybdenum
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/13—Refractory metals, i.e. Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W
    • F05D2300/132—Chromium
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/17—Alloys
    • F05D2300/171—Steel alloys

Definitions

  • the invention relates to a turbine housing for a steam turbine and / or a gas turbine. Furthermore, the invention relates to a method for producing such a turbine housing.
  • Turbine housings of the type mentioned above often come into contact with erosive or corrosive flow media.
  • the casings of steam turbines are often exposed to steam conditions with erosive or corrosive properties.
  • Such turbine housings have therefore hitherto been designed as welded constructions with welded high-alloyed metal sheets or manufactured entirely from high-alloy cast steel. The production of such turbine housing is very expensive.
  • An object of the invention is to improve a turbine housing of the type mentioned above and a method of the type mentioned in that the turbine housing can be produced more cheaply, but at the same time has a high wear resistance in operation.
  • This object is achieved according to the invention with a generic turbine housing in which the turbine housing at least partially gray and / or ductile iron contains as a base material, wherein in the gray and / or ductile iron at least one element is embedded, which has a high alloyed metallic material.
  • the object is achieved by a generic method which comprises the steps of providing at least one element comprising a high-alloyed metallic material, and producing at least one section of the turbine housing made of gray and / or nodular cast iron with simultaneous Embedding the at least one, the high-alloy metallic material having element in the portion of the door box housing.
  • a highly alloyed metallic material is to be understood here as meaning an alloy in which at least one of the alloying elements has a mass fraction of more than 5%.
  • a highly alloyed metallic material exhibiting element according to the invention may be designed in particular as a high-alloy sheet.
  • Cast iron is here understood to mean a cast iron with lamellar graphite, in particular according to DIN 1691.
  • a gray cast iron forming a base material of the turbine housing according to the invention can be cast and machined excellently. As raw materials of gray cast iron, almost 100% recycled materials are usually used. The gray cast iron is thus inexpensive to produce.
  • Spheroidal cast iron is understood to mean cast iron with nodular graphite, which is produced by means of so-called "pressure methods".
  • materials according to DIN 1693 are considered nodular cast iron in this sense.
  • Ductile iron materials are characterized by high toughness and strength. They are easy to work with, vibration damping and design welded. Ductile iron is also inexpensive to produce. So will in the DE 19742621 A a half-shell, turbine housing made of nodular cast iron, in which a pipe segment made of steel is cast.
  • the production costs of the turbine housing can be significantly reduced.
  • the turbine housing By embedding the element containing the high-alloy metallic material in the base material at suitable locations, the turbine housing nevertheless obtains suitable wear resistance against erosive or corrosive states of the flow medium of the turbine, in particular with respect to erosive or corrosive vapor states.
  • the turbine housing according to the invention has improved mechanical and technological properties.
  • the strength of the turbine housing can be increased over the prior art weldments.
  • Furthermore can be made by gray and / or ductile iron in a simple manner any shape. By using gray and / or nodular cast iron, more cost-effective machining of the turbine housing is furthermore possible.
  • the at least one element comprising the high-alloyed metallic material is cast into the gray and / or nodular cast iron.
  • the at least one section of the turbine housing is produced by casting, wherein during casting, the at least one element is poured into the section of the turbine housing.
  • the element comprising the high-alloyed metallic material can be embedded in the gray and / or nodular cast iron in a particularly simple and efficient manner in terms of production technology. It can also be made a particularly strong and stable connection between the gray and / or ductile iron and the element.
  • the at least one element comprising the high-alloyed metallic material has the form of a bar or bar.
  • the resistance of the element comprising the high-alloyed metallic material to erosive or corrosive media is particularly high when the high-alloyed metallic material has at least one of the chemical elements carbon, chromium, nickel and / or molybdenum.
  • the carbon content in the high-alloyed metallic material is about 0.03%, the chromium content about 13% and / or the nickel content about 4%. It is particularly useful if the high-alloyed metallic material X3CrNiMo13-4 has.
  • the at least one element having the high-alloyed metallic material is expedient for the at least one element having the high-alloyed metallic material to be arranged in a region of the turbine housing which is acted upon by steam during operation of the associated turbine.
  • the at least one element comprising the high-alloyed metallic material is arranged in a region of a transition between different components of the turbine housing. This makes it possible to prevent erosive or corrosive properties of the flow medium of the associated turbine in transition areas between different components of the turbine housing causing damage.
  • the element comprising the high-alloyed metallic material is arranged in the region of a seal between different components of the turbine housing.
  • Fig. 1 shows an embodiment of a turbine housing 10 for a double-flow steam turbine.
  • the turbine housing 10 has an inflow section 12 for introducing pressurized heated steam.
  • the vapor flows along a symmetry axis 14 of the inflow section 12 that is vertically aligned in the figure.
  • the steam is deflected in turbine blade sections 20 of the turbine housing 10 arranged on both sides with respect to the inflow section 12.
  • the steam flows substantially perpendicular to the axis of symmetry 13 of the inflow section 12, thereby driving a rotor of the steam turbine via turbine blades.
  • a hollow chamber 18 adjoins a wall 16 of the inflow section 12.
  • the respective hollow chamber 18 has a respective separation plane 22 to the adjoining turbine blade section 20 at a respective side of the hollow chamber 18 opposite the wall 16 of the inflow section 12. Furthermore, the respective hollow chamber 18 is limited with a perpendicular to the axis of symmetry 14 of the inflow 12 aligned and the hollow chamber 18 to the turbine interior limiting boundary wall 26.
  • a sealing ring 28 is provided in the area of the boundary wall 26 arranged to the left of the symmetry axis 14 of the inflow section 12 according to the FIGURE.
  • the turbine housing 10 has gray and / or nodular cast iron as the base material.
  • gray and / or nodular cast iron are in particular at locations of the turbine housing 10, which are acted upon in the operation of the steam turbine with erosive or corrosive vapor states, high-alloyed metallic material having cast elements or high-alloy sheets. These elements have the material X3CrNiMo13-4. Examples of the arrangement of such elements are shown in the figure.
  • the parting planes 22 each have a bolt 24 or a rod made of the high-alloyed metallic material.
  • the sealing ring 28 is made of the high-alloyed metallic material.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Description

Die Erfindung betrifft ein Turbinengehäuse für eine Dampfturbine und/oder eine Gasturbine. Ferner betrifft die Erfindung ein Verfahren zum Herstellen eines derartigen Turbinengehäuses.The invention relates to a turbine housing for a steam turbine and / or a gas turbine. Furthermore, the invention relates to a method for producing such a turbine housing.

Turbinengehäuse der oben genannten Art kommen oft mit erosiven bzw. korrosiven Strömungsmedien in Kontakt. So sind die Gehäuse von Dampfturbinen oft Dampfzuständen mit erosiven bzw. korrosiven Eigenschaften ausgesetzt. Derartige Turbinengehäuse wurden daher bisher als Schweißkonstruktionen mit eingeschweißten hochlegierten Blechen ausgeführt oder vollständig aus hochlegiertem Stahlguss gefertigt. Die Herstellung derartiger Turbinengehäuse ist jedoch sehr kostenintensiv.Turbine housings of the type mentioned above often come into contact with erosive or corrosive flow media. Thus, the casings of steam turbines are often exposed to steam conditions with erosive or corrosive properties. Such turbine housings have therefore hitherto been designed as welded constructions with welded high-alloyed metal sheets or manufactured entirely from high-alloy cast steel. The production of such turbine housing is very expensive.

Eine der Erfindung zugrunde liegende Aufgabe besteht darin, ein Turbinengehäuse der eingangs genannten Art sowie ein Verfahren der eingangs genannten Art dahingehend zu verbessern, dass das Turbinengehäuse kostengünstiger hergestellt werden kann, aber gleichzeitig im Betrieb eine hohe Verschleißfestigkeit aufweist.An object of the invention is to improve a turbine housing of the type mentioned above and a method of the type mentioned in that the turbine housing can be produced more cheaply, but at the same time has a high wear resistance in operation.

Diese Aufgabe ist erfindungsgemäß mit einem gattungsgemäßen Turbinengehäuse gelöst, bei dem das Turbinengehäuse zumindest abschnittsweise Grau- und/oder Sphäroguss als Grundwerkstoff enthält, wobei in dem Grau- und/oder Sphäroguss mindestens ein Element eingebettet ist, welches einen hochlegierten metallischen Werkstoff aufweist. Darüber hinaus ist die Aufgabe mit einem gattungsgemäßen Verfahren gelöst, welches die Schritte eines Bereitstellens mindestens eines einen hochlegierten metallischen Werkstoff aufweisenden Elementes, sowie eines Herstellens mindestens eines Abschnitts des Turbinengehäuses aus Grau- und/oder Sphäroguss unter gleichzeitigem Einbetten des mindestens einen, den hochlegierten metallischen Werkstoff aufweisenden Elementes in den Abschnitt des Türbinengehäuses aufweist.This object is achieved according to the invention with a generic turbine housing in which the turbine housing at least partially gray and / or ductile iron contains as a base material, wherein in the gray and / or ductile iron at least one element is embedded, which has a high alloyed metallic material. In addition, the object is achieved by a generic method which comprises the steps of providing at least one element comprising a high-alloyed metallic material, and producing at least one section of the turbine housing made of gray and / or nodular cast iron with simultaneous Embedding the at least one, the high-alloy metallic material having element in the portion of the door box housing.

Unter einem hochlegierten metallischen Werkstoff ist hier eine Legierung zu verstehen, bei der mindestens eines der Legierungselemente ein Massenanteil von mehr als 5% aufweist. Ein einen hochlegierten metallischen Werkstoff aufweisendes Element gemäß der Erfindung kann insbesondere als hochlegiertes Blech ausgeführt sein. Unter Grauguss ist hier ein Gusseisen mit Lamellengraphit, insbesondere gemäß DIN 1691 zu verstehen. Ein gemäß der Erfindung einen Grundwerkstoff des Turbinengehäuses bildender Grauguss lässt sich hervorragend vergießen und spanend bearbeiten. Als Ausgangsmaterialien des Graugusses werden in der Regel nahezu 100% Recyclingwerkstoffe verwendet. Der Grauguss ist damit kostengünstig herstellbar. Unter Sphäroguss wird hier ein Gusseisen mit Kugelgraphit verstanden, welches mittels so genannten "Druckmethoden" erzeugt wird. Insbesondere Materialien gemäß DIN 1693 gelten als Sphäroguss in diesem Sinne. Sphärogussmaterialien zeichnen sich durch hohe Zähigkeit und Festigkeit aus. Sie sind leicht zu bearbeiten, schwingungsdämpfungsfähig und darüber hinaus konstruktionsschweißbar. Auch ist Sphäroguss in der Herstellung kostengünstig. So wird in der DE 19742621 A ein halbschaliges, Turbinengehäuse aus Sphäroguss hergestellt, in das ein Leitungssegment aus Stahl eingegossen ist.A highly alloyed metallic material is to be understood here as meaning an alloy in which at least one of the alloying elements has a mass fraction of more than 5%. A highly alloyed metallic material exhibiting element according to the invention may be designed in particular as a high-alloy sheet. Cast iron is here understood to mean a cast iron with lamellar graphite, in particular according to DIN 1691. A gray cast iron forming a base material of the turbine housing according to the invention can be cast and machined excellently. As raw materials of gray cast iron, almost 100% recycled materials are usually used. The gray cast iron is thus inexpensive to produce. Spheroidal cast iron is understood to mean cast iron with nodular graphite, which is produced by means of so-called "pressure methods". In particular, materials according to DIN 1693 are considered nodular cast iron in this sense. Ductile iron materials are characterized by high toughness and strength. They are easy to work with, vibration damping and design welded. Ductile iron is also inexpensive to produce. So will in the DE 19742621 A a half-shell, turbine housing made of nodular cast iron, in which a pipe segment made of steel is cast.

Durch die Verwendung von Grau- und/oder Sphäroguss als Grundwerkstoff für das Turbinengehäuse lassen sich die Herstellkosten des Turbinengehäuses deutlich verringern. Durch das Einbetten des den hochlegierten metallischen Werkstoff enthaltenden Elementes in den Grundwerkstoff an geeigneten Stellen erlangt das Turbinengehäuse trotzdem eine geeignete Verschleißfestigkeit gegenüber erosiven bzw. korrosiven Zuständen des Strömungsmediums der Turbine, insbesondere gegenüber erosiven bzw. korrosiven Dampfzuständen auf. Darüber hinaus weist das erfindungsgemäße Turbinengehäuse verbesserte mechanische und technologische Eigenschaften auf. Die Festigkeit des Turbinengehäuses kann gegenüber den im Stand der Technik verwendeten Schweißkonstruktionen erhöht werden. Darüber hinaus kann mittels Grau- und/oder Sphäroguss auf einfache Weise jede beliebige Form hergestellt werden. Durch die Verwendung von Grau- und/oder Sphäroguss ist weiterhin eine kostengünstigere mechanische Bearbeitung des Turbinengehäuses möglich. Gegenüber einer Schweißkonstruktion entsteht darüber hinaus ein geringerer Prüfaufwand. Die Zeichnungs- und Stücklistenerstellung ist für die Herstellung des erfindungsgemäßen Turbinengehäuses gegenüber vorbekannten Herstellungsverfahren vereinfacht. Aufgrund all dieser Vorteile in der Fertigung können mittels der Erfindung gegenüber Schweiß- oder Stahlgussgehäusen kürzere Lieferzeiten für Turbinengehäuse erreicht werden. Schließlich besteht auch die Möglichkeit an dem mindestens einen eingegossenen, den hochlegierten metallischen Werkstoff enthaltenden Element Konstruktionsschweißungen durchzuführen.By using gray and / or nodular cast iron as the base material for the turbine housing, the production costs of the turbine housing can be significantly reduced. By embedding the element containing the high-alloy metallic material in the base material at suitable locations, the turbine housing nevertheless obtains suitable wear resistance against erosive or corrosive states of the flow medium of the turbine, in particular with respect to erosive or corrosive vapor states. In addition, the turbine housing according to the invention has improved mechanical and technological properties. The strength of the turbine housing can be increased over the prior art weldments. Furthermore can be made by gray and / or ductile iron in a simple manner any shape. By using gray and / or nodular cast iron, more cost-effective machining of the turbine housing is furthermore possible. Compared to a welded construction also results in a lower inspection costs. The drawing and BOM creation is simplified for the production of the turbine housing according to the invention over prior art manufacturing processes. Due to all these advantages in manufacturing shorter delivery times for turbine housing can be achieved by means of the invention compared to welded or cast steel housings. Finally, it is also possible to carry out construction welds on the at least one cast-in element containing the high-alloyed metallic material.

In einer vorteilhaften Ausführungsform ist das mindestens eine, den hochlegierten metallischen Werkstoff aufweisenden Element in den Grau- und/oder Sphäroguss eingegossen. In einer vorteilhaften Ausführungsform des erfindungsgemäßen Verfahrens wird der mindestens eine Abschnitt des Turbinengehäuses durch Gießen hergestellt, wobei beim Gießen das mindestens eine Element in den Abschnitt des Turbinengehäuses eingegossen wird. Damit kann das den hochlegierten metallischen Werkstoff aufweisende Element auf eine fertigungstechnisch besonders einfache und effiziente Weise in den Grau- und/oder Sphäroguss eingebettet werden. Es kann weiterhin eine besonders feste und beständige Verbindung zwischen dem Grau- und/oder Sphäroguss und dem Element hergestellt werden.In an advantageous embodiment, the at least one element comprising the high-alloyed metallic material is cast into the gray and / or nodular cast iron. In an advantageous embodiment of the method according to the invention, the at least one section of the turbine housing is produced by casting, wherein during casting, the at least one element is poured into the section of the turbine housing. Thus, the element comprising the high-alloyed metallic material can be embedded in the gray and / or nodular cast iron in a particularly simple and efficient manner in terms of production technology. It can also be made a particularly strong and stable connection between the gray and / or ductile iron and the element.

In einer weiteren vorteilhaften Ausführungsform weist das mindestens eine, den hochlegierten metallischen Werkstoff aufweisende Element die Form eines Riegels oder Stabes auf. Mittels eines derartigen Riegels oder Stabes lassen sich Übergangsbereiche zwischen Abschnitten bzw. Komponenten des Turbinengehäuses, an denen das Strömungsmedium entlangströmt, besonders wirkungsvoll gegenüber den erosiven bzw. korrosiven Eigenschaften des Strömungsmediums schützen.In a further advantageous embodiment, the at least one element comprising the high-alloyed metallic material has the form of a bar or bar. By means of such a bar or rod, transition areas between sections or components of the turbine housing, along which the flow medium flows, can be particularly effectively protected against the erosive or corrosive properties of the flow medium.

Die Beständigkeit des den hochlegierten metallischen Werkstoff aufweisenden Elementes gegenüber erosiven bzw. korrosiven Medien ist besonders hoch, wenn der hochlegierte metallische Werkstoff mindestens eines der chemischen Elemente Kohlenstoff, Chrom, Nickel und/oder Molybdän aufweist. In besonders vorteilhafter Ausführungsform beträgt der Kohlenstoffgehalt in dem hochlegierten metallischen Werkstoff etwa 0,03%, der Chromgehalt etwa 13% und/oder der Nickelgehalt etwa 4%. Es ist besonders zweckmäßig, wenn der hochlegierte metallische Werkstoff X3CrNiMo13-4 aufweist.The resistance of the element comprising the high-alloyed metallic material to erosive or corrosive media is particularly high when the high-alloyed metallic material has at least one of the chemical elements carbon, chromium, nickel and / or molybdenum. In a particularly advantageous embodiment, the carbon content in the high-alloyed metallic material is about 0.03%, the chromium content about 13% and / or the nickel content about 4%. It is particularly useful if the high-alloyed metallic material X3CrNiMo13-4 has.

Um das Turbinengehäuse besonders gut vor erosiven bzw. korrosiven Dampfzuständen einer Dampfturbine zu schützen, ist es zweckmäßig, wenn das mindestens eine, den hochlegierten metallischen Werkstoff aufweisende Element in einem Bereich des Turbinengehäuses angeordnet, welches im Betrieb der zugehörigen Turbine mit Dampf beaufschlagt ist.In order to protect the turbine housing particularly well against erosive or corrosive steam conditions of a steam turbine, it is expedient for the at least one element having the high-alloyed metallic material to be arranged in a region of the turbine housing which is acted upon by steam during operation of the associated turbine.

Darüber hinaus ist es zweckmäßig, wenn das mindestens eine, den hochlegierten metallischen Werkstoff aufweisende Element in einem Bereich eines Übergangs zwischen verschiedenen Komponenten des Turbinengehäuses angeordnet ist. Damit lässt sich verhindern, dass erosive bzw. korrosive Eigenschaften des Strömungsmediums der zugehörigen Turbine in Übergangsbereichen zwischen verschiedenen Komponenten des Turbinengehäuses Schaden anrichten. Insbesondere ist es vorteilhaft, wenn das den hochlegierten metallischen Werkstoff aufweisende Element im Bereich einer Versiegelung zwischen verschiedenen Komponenten des Turbinengehäuses angeordnet ist.Moreover, it is expedient if the at least one element comprising the high-alloyed metallic material is arranged in a region of a transition between different components of the turbine housing. This makes it possible to prevent erosive or corrosive properties of the flow medium of the associated turbine in transition areas between different components of the turbine housing causing damage. In particular, it is advantageous if the element comprising the high-alloyed metallic material is arranged in the region of a seal between different components of the turbine housing.

Nachfolgend wird ein Ausführungsbeispiel eines erfindungsgemäßen Turbinengehäuses für eine Dampfturbine anhand der beigefügten schematischen Zeichnung näher erläutert.An exemplary embodiment of a turbine housing according to the invention for a steam turbine is explained in more detail below with reference to the attached schematic drawing.

Die einzige Figur zeigt:

  • einen Längsschnitt eines Ausführungsbeispiels eines erfindungsgemäßen Turbinengehäuses.
The only figure shows:
  • a longitudinal section of an embodiment of a turbine housing according to the invention.

Fig. 1 zeigt ein Ausführungsbeispiel eines Turbinengehäuses 10 für eine doppelflutige Dampfturbine. Das Turbinengehäuse 10 weist einen Einströmabschnitt 12 zum Einbringen von unter Druck befindlichem erhitztem Dampf auf. Der Dampf strömt dabei entlang einer in der Figur vertikal ausgerichteten Symmetrieachse 14 des Einströmabschnitts 12 entlang. Nach dem Einströmen des Dampfes in den Einströmabschnitt 12 des Turbinengehäuses 10 wird der Dampf in beidseitig bezüglich des Einströmabschnitts 12 angeordnete Turbinenschaufelabschnitte 20 des Turbinengehäuses 10 umgelenkt. In den Turbinenschaufelabschnitten 20 strömt der Dampf im Wesentlichen senkrecht zur Symmetrieachse 13 des Einströmabschnitts 12 und treibt dabei über Turbinenschaufeln einen Rotor der Dampfturbine an. Fig. 1 shows an embodiment of a turbine housing 10 for a double-flow steam turbine. The turbine housing 10 has an inflow section 12 for introducing pressurized heated steam. The vapor flows along a symmetry axis 14 of the inflow section 12 that is vertically aligned in the figure. After the steam has flowed into the inflow section 12 of the turbine housing 10, the steam is deflected in turbine blade sections 20 of the turbine housing 10 arranged on both sides with respect to the inflow section 12. In the turbine blade sections 20, the steam flows substantially perpendicular to the axis of symmetry 13 of the inflow section 12, thereby driving a rotor of the steam turbine via turbine blades.

Auf beiden Seiten des Einströmabschnitts 12 grenzt jeweils eine Hohlkammer 18 an eine Wandung 16 des Einströmabschnitts 12 an. Die jeweilige Hohlkammer 18 weist an einer jeweiligen, der Wandung 16 des Einströmabschnitts 12 gegenüber liegenden Seite der Hohlkammer 18 jeweils eine Trennebene 22 zum daran anschließenden Turbinenschaufelabschnitt 20 auf. Weiterhin ist die jeweilige Hohlkammer 18 mit einer senkrecht zur Symmetrieachse 14 des Einströmabschnitts 12 ausgerichteten und die Hohlkammer 18 zum Turbineninneren hin begrenzenden Begrenzungswand 26 begrenzt. Im Bereich der gemäß der Figur links von der Symmetrieachse 14 des Einströmabschnitts 12 angeordneten Begrenzungswand 26 ist ein Versiegelungsring 28 vorgesehen.On each side of the inflow section 12, a hollow chamber 18 adjoins a wall 16 of the inflow section 12. The respective hollow chamber 18 has a respective separation plane 22 to the adjoining turbine blade section 20 at a respective side of the hollow chamber 18 opposite the wall 16 of the inflow section 12. Furthermore, the respective hollow chamber 18 is limited with a perpendicular to the axis of symmetry 14 of the inflow 12 aligned and the hollow chamber 18 to the turbine interior limiting boundary wall 26. A sealing ring 28 is provided in the area of the boundary wall 26 arranged to the left of the symmetry axis 14 of the inflow section 12 according to the FIGURE.

Das Turbinengehäuse 10 weist als Grundwerkstoff Grau- und/oder Sphäroguss auf. In den Grau- und/oder Sphäroguss sind insbesondere an Stellen des Turbinengehäuses 10, die im Betrieb der Dampfturbine mit erosiven bzw. korrosiven Dampfzuständen beaufschlagt sind, hochlegierten metallischen Werkstoff aufweisende Elemente bzw. hochlegierte Bleche eingegossen. Diese Elemente weisen den Werkstoff X3CrNiMo13-4 auf. Beispiele für die Anordnung derartiger Elemente sind in der Figur gezeigt. So weisen die Trennebenen 22 jeweils einen Riegel 24 bzw. einen Stab aus dem hochlegierten metallischen Werkstoff auf. Auch ist der Versiegelungsring 28 aus dem hochlegierten metallischen Werkstoff gefertigt.The turbine housing 10 has gray and / or nodular cast iron as the base material. In the gray and / or nodular cast iron are in particular at locations of the turbine housing 10, which are acted upon in the operation of the steam turbine with erosive or corrosive vapor states, high-alloyed metallic material having cast elements or high-alloy sheets. These elements have the material X3CrNiMo13-4. Examples of the arrangement of such elements are shown in the figure. Thus, the parting planes 22 each have a bolt 24 or a rod made of the high-alloyed metallic material. Also, the sealing ring 28 is made of the high-alloyed metallic material.

Claims (8)

  1. Turbine casing (10) for a steam turbine and/or a gas turbine, wherein
    the turbine casing (10) contains grey cast iron and/or nodular cast iron as base material at least in certain portions,
    wherein at least one element (24, 28) is embedded in the grey cast iron and/or nodular cast iron,
    characterized in that the element (24, 28) comprises a high-alloy metallic material, at least one of the alloying elements in the high-alloy metallic material having a proportion of more than 5% by mass.
  2. Turbine casing according to Claim 1,
    characterized in that
    the at least one element (24, 28) comprising the high-alloy metallic material is cast into the grey cast iron and/or nodular cast iron.
  3. Turbine casing according to Claim 1 or 2,
    characterized in that
    the at least one element (24, 28) comprising the high-alloy metallic material is in the form of a bar (24) or rod.
  4. Turbine casing according to one of the preceding claims,
    characterized in that
    the high-alloy metallic material comprises at least one of the chemical elements carbon, chromium, nickel and/or molybdenum.
  5. Turbine casing according to one of the preceding claims,
    characterized in that
    the at least one element (24, 28) comprising the high-alloy metallic material is arranged in a region of the turbine casing (10)
    which is exposed to steam during operation of the associated turbine.
  6. Turbine casing according to one of the preceding claims,
    characterized in that
    the at least one element (24, 28) comprising the high-alloy metallic material is arranged in a region of transition between various components of the turbine casing (10).
  7. Method for producing a turbine casing (10) for a steam turbine and/or a gas turbine,
    characterized by the following steps:
    at least one element (24, 28) comprising a high-alloy metallic material is provided,
    and also at least one portion of the turbine casing (10) is produced from grey cast iron and/or nodular cast iron,
    with the at least one element (24, 28) comprising the high-alloy metallic material being simultaneously embedded in the portion of the turbine casing (10),
    at least one of the alloying elements in the high-alloy metallic material having a proportion of more than 5% by mass.
  8. Method according to Claim 7,
    characterized in that
    the at least one portion of the turbine casing (10) is produced by casting and, during the casting, the at least one element (24, 28) is cast into the portion of the turbine casing (10).
EP20060011628 2006-06-06 2006-06-06 Turbine casing for a steam turbine and/or a gas turbine and production method thereof Not-in-force EP1865155B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20060011628 EP1865155B1 (en) 2006-06-06 2006-06-06 Turbine casing for a steam turbine and/or a gas turbine and production method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20060011628 EP1865155B1 (en) 2006-06-06 2006-06-06 Turbine casing for a steam turbine and/or a gas turbine and production method thereof

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Publication Number Publication Date
EP1865155A1 EP1865155A1 (en) 2007-12-12
EP1865155B1 true EP1865155B1 (en) 2012-05-23

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Application Number Title Priority Date Filing Date
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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2196628A1 (en) * 2008-12-10 2010-06-16 Siemens Aktiengesellschaft Lead rotor holder

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19742621A1 (en) * 1997-09-26 1999-04-08 Siemens Ag Shaft seal component for steam turbine machine
DE10110804A1 (en) * 2001-03-06 2002-09-12 Euroflamm Gmbh Production of a metallic layer on the inner side of a turbine housing of an internal combustion engine comprises directly applying the layer as a single corrosion protection layer on the surface
DE10353451A1 (en) * 2003-11-15 2005-06-16 Alstom Technology Ltd Steam turbine and method for producing such a steam turbine

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