EP2510195B1 - Internal casing for a steam turbine - Google Patents

Internal casing for a steam turbine Download PDF

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Publication number
EP2510195B1
EP2510195B1 EP10790396.5A EP10790396A EP2510195B1 EP 2510195 B1 EP2510195 B1 EP 2510195B1 EP 10790396 A EP10790396 A EP 10790396A EP 2510195 B1 EP2510195 B1 EP 2510195B1
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EP
European Patent Office
Prior art keywords
steam turbine
housing
casing
steam
parting line
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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EP10790396.5A
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German (de)
French (fr)
Other versions
EP2510195A1 (en
Inventor
Christian Cukjati
Heinz Dallinger
Thomas Müller
Norbert Thamm
Andreas Ulma
Michael Wechsung
Uwe Zander
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Siemens AG
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Siemens AG
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Publication date
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Priority to EP10790396.5A priority Critical patent/EP2510195B1/en
Publication of EP2510195A1 publication Critical patent/EP2510195A1/en
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Publication of EP2510195B1 publication Critical patent/EP2510195B1/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
    • F01D25/26—Double casings; Measures against temperature strain in casings
    • F01D25/265—Vertically split casings; Clamping arrangements 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
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • 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
    • F01D25/243—Flange connections; Bolting arrangements
    • 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
    • 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
    • F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
    • 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
    • F05D2220/70—Application in combination with
    • F05D2220/72—Application in combination with a steam turbine
    • 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
    • F05D2240/00—Components
    • F05D2240/10—Stators
    • F05D2240/14—Casings or housings protecting or supporting assemblies within

Definitions

  • the invention relates to a housing for a turbomachine, wherein the housing comprises a first part and a second part.
  • a steam turbine conventionally includes a rotatably mounted rotor and a housing disposed about the rotor. Between the rotor and the inner housing, a flow channel is formed.
  • the housing in a steam turbine must be able to fulfill several functions.
  • the guide vanes are arranged in the flow channel on the housing and, secondly, the inner housing must withstand the pressure and the temperatures of the flow medium for all load and special operating cases.
  • the flow medium is steam.
  • the housing must be designed such that inlets and outlets, which are also referred to as taps, are possible. Another feature that a case must meet is the possibility of a shaft end passing through the case.
  • the high voltages, pressures, and temperatures that occur during operation require that the materials be properly selected and that the design be selected to provide mechanical integrity and functionality. This requires that high-quality materials are used, especially in the area of the inflow and the first Leitschaufelnuten.
  • nickel-based alloys are suitable because they are the high temperatures occurring loads withstand.
  • the use of such a nickel-based alloy is associated with new challenges.
  • the cost of nickel-base alloys is relatively high and also the manufacturability of nickel-based alloys, for example limited by limited casting possibility.
  • the use of nickel-based materials must be minimized.
  • the nickel-based materials are poor heat conductors.
  • the temperature gradients over the wall thickness are so rigid that thermal stresses are comparatively high.
  • Steam turbines which are designed for high pressures and high steam temperatures, usually have an inner housing and an outer housing.
  • the outer housing is usually designed in two parts and has a horizontal parting line, wherein embodiments are known in which the outer housing is designed as a pot housing.
  • the inner housing is usually made in two parts and also has a horizontal parting line.
  • the inner housing has inlet openings, which must be sufficiently dimensioned to the necessary for the power generation and the steam valves supplied steam masses or Record vapor flow. In addition, the steam mass and the steam volume flow must be performed evenly to the turbine blading.
  • Conventional steam turbines have an inner housing, which consists of an upper part and a lower part.
  • the distance from the horizontal parting line to the center of the steam turbine is defined by the required cross-section, which is required for the passage of the steam mass flow.
  • This definition also defines the requirements for the part-joint screws.
  • the partial joint screw design must be dimensioned such that the screw force is sufficient to counteract the compressive force resulting from the vapor pressure and the cross-sectional area and thus to ensure the Generalfugendimi.
  • the inflow takes place via two inlet openings in the lower part.
  • the supply of the upper part via the passage area in the region of the horizontal parting line.
  • the dimensioning of the parting screw is done via the cross-sectional area in the parting line. For large cross-sectional areas, higher-quality screw designs must be used.
  • the invention begins, whose task is to provide a housing in which smaller dimensioned parting screws can be used.
  • the invention is based on the aspect that a horizontal parting can be omitted in the inner housing and instead a vertical parting line is used.
  • the vertical parting line is thus in the 12 and 6 o'clock position. Due to the vertical parting line and the associated flow of the inflow channel, the cross-sectional area on which the screw dimensioning is based can be reduced.
  • the part-joint screws can be arranged closer to the center of the turbine, which is accompanied by a reduction of the dimensioning of the part-joint screw design pressure surfaces.
  • One effect of this is that smaller screw sizes can be used.
  • an inferior screw material as well as smaller inner shell castings can be used. The overall leads to a cost reduction.
  • the first part and / or the second part has inflow openings, which are advantageously made substantially symmetrical.
  • the steam turbine 1 shown in FIG. 1 is an embodiment of a turbomachine.
  • the steam turbine 1 comprises an outer housing 2 and an inner housing 3.
  • a rotor not shown, is rotatably mounted about a rotation axis 4.
  • the inner housing 3 comprises a first part 3a and a second part 3b.
  • the first part 3a and the second part 3b is formed via a vertical parting line 5.
  • the first part 3a and the second part 3b is held together by not shown detail part screws on the vertical parting line 5.
  • the vertical parting line 5 refers to a horizontal line 6, which corresponds to the natural horizontal in operation.
  • the vertical parting line 5 does not have to be rotated exactly 90 ° with respect to the horizontal line 6. Rather, the vertical parting line in an angular range of -10 ° to + 10 ° relative to the theoretically exact vertical line, which is rotated 90 ° relative to the horizontal line 6, may be formed.
  • the first part 3a and the second part 3b each have an inflow opening 7, via which a steam flows in operation into a flow channel, not shown.
  • the outer housing 2 has a horizontal parting line 8. Therefore, the outer case 2 has an upper part 2a and a lower part 2b.
  • the steam turbine 1 can be used in the high pressure range or in the medium pressure range.

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

Description

Die Erfindung betrifft ein Gehäuse für eine Strömungsmaschine, wobei das Gehäuse ein erstes Teil und ein zweites Teil umfasst.The invention relates to a housing for a turbomachine, wherein the housing comprises a first part and a second part.

Unter einer Strömungsmaschine wird beispielsweise eine Dampfturbine verstanden. Eine Dampfturbine weist üblicher Weise einen drehbar gelagerten Rotor und ein Gehäuse, das um den Rotor angeordnet ist auf. Zwischen dem Rotor und dem Innengehäuse ist ein Strömungskanal ausgebildet. Das Gehäuse in einer Dampfturbine muss mehrere Funktionen erfüllen können. Zum einen werden die Leitschaufeln im Strömungskanal am Gehäuse angeordnet und zum zweiten muss das Innengehäuse den Druck und den Temperaturen des Strömungsmediums für alle Last- und besondere Betriebsfälle standhalten. Bei einer Dampfturbine ist das Strömungsmedium Dampf. Des Weiteren muss das Gehäuse derart ausgebildet sein, dass Zu- und Abführungen, die auch als Anzapfungen bezeichnet werden, möglich sind. Eine weitere Funktion, die ein Gehäuse erfüllen muss, ist die Möglichkeit, dass ein Wellenende durch das Gehäuse durchgeführt werden kann.Under a turbomachine, for example, a steam turbine is understood. A steam turbine conventionally includes a rotatably mounted rotor and a housing disposed about the rotor. Between the rotor and the inner housing, a flow channel is formed. The housing in a steam turbine must be able to fulfill several functions. On the one hand, the guide vanes are arranged in the flow channel on the housing and, secondly, the inner housing must withstand the pressure and the temperatures of the flow medium for all load and special operating cases. In a steam turbine, the flow medium is steam. Furthermore, the housing must be designed such that inlets and outlets, which are also referred to as taps, are possible. Another feature that a case must meet is the possibility of a shaft end passing through the case.

Bei den im Betrieb auftretenden hohen Spannungen, Drücken und Temperaturen ist es erforderlich, dass die Werkstoffe geeignet ausgewählt werden sowie die Konstruktion derart gewählt ist, dass die mechanische Integrität und Funktionalität ermöglicht wird. Dafür ist es erforderlich, dass hochwertige Werkstoffe zum Einsatz kommen, insbesondere im Bereich der Einströmung und der ersten Leitschaufelnuten.The high voltages, pressures, and temperatures that occur during operation require that the materials be properly selected and that the design be selected to provide mechanical integrity and functionality. This requires that high-quality materials are used, especially in the area of the inflow and the first Leitschaufelnuten.

Für die Anwendungen bei Frischdampftemperaturen von über 650°C, wie z.B. 700°C, sind Nickel-Basis-Legierungen geeignet, da sie den bei hohen Temperaturen auftretenden Belastungen standhalten. Allerdings ist die Verwendung einer solchen Nickel-Basis-Legierung mit neuen Herausforderungen verbunden. So sind die Kosten für Nickel-Basis-Legierungen vergleichsweise hoch und außerdem ist die Fertigbarkeit von Nickel-Basis-Legierungen, z.B. durch beschränkte Gussmöglichkeit begrenzt. Dies führt dazu, dass die Verwendung von Nickel-Basis-Werkstoffen minimiert werden muss. Des Weiteren sind die Nickel-Basis-Werkstoffe schlechte Wärmeleiter. Dadurch sind die Temperaturgradienten über der Wandstärke so starr, dass Thermospannungen vergleichsweise hoch sind. Des Weiteren ist zu berücksichtigen, dass bei der Verwendung von NickelBasis-Werkstoffen die Temperaturdifferenz zwischen Ein- und Auslass der Dampfturbine steigt.For applications at live steam temperatures of over 650 ° C, such as 700 ° C, nickel-based alloys are suitable because they are the high temperatures occurring loads withstand. However, the use of such a nickel-based alloy is associated with new challenges. Thus, the cost of nickel-base alloys is relatively high and also the manufacturability of nickel-based alloys, for example limited by limited casting possibility. As a result, the use of nickel-based materials must be minimized. Furthermore, the nickel-based materials are poor heat conductors. As a result, the temperature gradients over the wall thickness are so rigid that thermal stresses are comparatively high. Furthermore, it must be taken into account that when using nickel-based materials, the temperature difference between the inlet and outlet of the steam turbine increases.

Es werden derzeit verschiedene Konzepte verfolgt, um eine Dampfturbine bereitzustellen, die für hohe Temperaturen und für hohe Drücke geeignet ist. So ist es bekannt, eine aus mehreren Teilen umfassende Innengehäusestruktur in eine Außengehäusestruktur einzuarbeiten gemäß dem Artikel Y. Tanaka et al. "Advanced Design of Mitsubishi Large Steam Turbines", Mitsubishi Heavy Industries, Power Gen Europe, 2003, Düsseldorf, May 06.-08., 2003 .
Es ist ebenso bekannt, ein Innengehäuse aus zwei Teilen auszubilden gemäß DE 10 2006 027 237 A1 .
In der DE 342 1067 wird ebenfalls eine mehrkomponentige Innengehäusestruktur offenbart sowie in der DE 103 53 451 A1 .Various concepts are currently being pursued to provide a steam turbine suitable for high temperatures and high pressures. Thus, it is known to incorporate a multi-part inner housing structure in an outer housing structure according to the article Y. Tanaka et al. Mitsubishi Heavy Industries, Power Gen Europe, 2003, Dusseldorf, May 06.-08., 2003 ,
It is also known to form an inner housing of two parts according to DE 10 2006 027 237 A1 ,
In the DE 342 1067 is also disclosed a multi-component inner housing structure and in the DE 103 53 451 A1 ,

Dampfturbine, die für hohe Drücke und hohe Dampftemperaturen ausgelegt sind, weisen in der Regel ein Innengehäuse und ein Außengehäuse auf. Das Außengehäuse ist in der Regel zweiteilig ausgeführt und weist eine horizontale Teilfuge auf, wobei Ausführungsformen bekannt sind, in der das Außengehäuse als Topfgehäuse ausgebildet ist. Das Innengehäuse ist in der Regel zweiteilig ausgeführt und weist ebenso eine horizontale Teilfuge auf. Das Innengehäuse weist Einströmöffnungen auf, die ausreichend dimensioniert sein müssen, um den für die Leistungserzeugung notwendigen und über die Dampfventile zugeführten Dampfmassen bzw. Dampfvolumenstrom aufzunehmen. Darüber hinaus müssen der Dampfmassen- und der Dampfvolumenstrom gleichmäßig zu der Turbinenbeschaufelung geführt werden. Herkömmliche Dampfturbinen weisen ein Innengehäuse auf, das aus einem Oberteil und aus einem Unterteil besteht. Der Abstand der horizontalen Teilfuge zu der Dampfturbinenmitte wird durch den erforderlichen Querschnitt definiert, der für die Durchleitung des Dampfmassenstromes benötigt wird. Durch diese Definition sind auch die Erfordernisse für die Teilfugenschrauben definiert. Die Teilfugenschraubenauslegung muss dabei derart dimensioniert sein, dass die Schraubenkraft ausreicht, um die aus dem Dampfdruck und der Querschnittsfläche resultierende Druckkraft entgegenzuwirken und somit die Teilfugendichtigkeit zu gewährleisten. Je größer diese Durchtrittsfläche gewählt wird, umso größer müssen die Schrauben sein bzw. muss der Schraubenwerkstoff aus einem höherwertigen Material bestehen.Steam turbines, which are designed for high pressures and high steam temperatures, usually have an inner housing and an outer housing. The outer housing is usually designed in two parts and has a horizontal parting line, wherein embodiments are known in which the outer housing is designed as a pot housing. The inner housing is usually made in two parts and also has a horizontal parting line. The inner housing has inlet openings, which must be sufficiently dimensioned to the necessary for the power generation and the steam valves supplied steam masses or Record vapor flow. In addition, the steam mass and the steam volume flow must be performed evenly to the turbine blading. Conventional steam turbines have an inner housing, which consists of an upper part and a lower part. The distance from the horizontal parting line to the center of the steam turbine is defined by the required cross-section, which is required for the passage of the steam mass flow. This definition also defines the requirements for the part-joint screws. The partial joint screw design must be dimensioned such that the screw force is sufficient to counteract the compressive force resulting from the vapor pressure and the cross-sectional area and thus to ensure the Teilfugendichtigkeit. The larger this passage area is selected, the larger the screws must be or the screw material must consist of a higher quality material.

Bei einem Innengehäuse mit horizontaler Teilfuge erfolgt die Einströmung über zwei Einströmöffnungen im Unterteil. Die Versorgung des Oberteils erfolgt über die Durchtrittsfläche im Bereich der horizontalen Teilfuge.In an inner housing with a horizontal parting line, the inflow takes place via two inlet openings in the lower part. The supply of the upper part via the passage area in the region of the horizontal parting line.

Die Dimensionierung der Teilfugenschrauben erfolgt über die Querschnittsfläche in der Teilfuge. Bei großen Querschnittsflächen müssen höherwertige Schraubenauslegungen eingesetzt werden.The dimensioning of the parting screw is done via the cross-sectional area in the parting line. For large cross-sectional areas, higher-quality screw designs must be used.

Wünschenswert wäre es, ein Innengehäusedesign zu haben, bei dem die Anforderungen an die Teilfugenschrauben geringer sind.It would be desirable to have an internal housing design in which the requirements for the parting screws are lower.

An dieser Stelle setzt die Erfindung an, deren Aufgabe es ist, ein Gehäuse anzugeben, bei dem geringer dimensionierte Teilfugenschrauben eingesetzt werden können.At this point, the invention begins, whose task is to provide a housing in which smaller dimensioned parting screws can be used.

Gelöst wird diese Aufgabe durch ein Gehäuse gemäß Anspruch 1.This object is achieved by a housing according to claim 1.

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

Die Erfindung geht von dem Aspekt aus, dass eine horizontale Teilfuge beim Innengehäuse entfallen kann und stattdessen eine vertikale Teilfuge eingesetzt wird. Die vertikale Teilfuge befindet sich somit in der 12- und 6Uhr-Position. Durch die vertikale Teilfuge und die damit verbundene Beströmung des Einströmkanals kann die der Schraubendimensionierung zu Grunde liegende Querschnittsfläche reduziert werden. Die Teilfugenschrauben können näher zur Turbinenmitte angeordnet werden, womit eine Reduzierung der für die Teilfugenschraubenauslegung dimensionierenden Druckflächen einhergehen. Ein Effekt davon ist, dass kleinere Schraubengrößen eingesetzt werden können. Des Weiteren kann ein minderwertigerer Schraubewerkstoff sowie kleinere Innengehäusegussstücke verwendet werden. Die führt insgesamt zu einer Kostenreduktion.The invention is based on the aspect that a horizontal parting can be omitted in the inner housing and instead a vertical parting line is used. The vertical parting line is thus in the 12 and 6 o'clock position. Due to the vertical parting line and the associated flow of the inflow channel, the cross-sectional area on which the screw dimensioning is based can be reduced. The part-joint screws can be arranged closer to the center of the turbine, which is accompanied by a reduction of the dimensioning of the part-joint screw design pressure surfaces. One effect of this is that smaller screw sizes can be used. Furthermore, an inferior screw material as well as smaller inner shell castings can be used. The overall leads to a cost reduction.

Das erste Teil und/oder das zweite Teil weist Einströmöffnungen auf, die vorteilhafter Weise im Wesentlichen symmetrisch ausgeführt sind.The first part and / or the second part has inflow openings, which are advantageously made substantially symmetrical.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung beschrieben. Dies soll das Ausführungsbeispiel nicht maßstäblich darstellen, vielmehr ist die Zeichnung, in schematisierter und/oder leicht verzerrter Form ausgeführt. Im Hinblick auf Ergänzungen der aus der Zeichnung unmittelbar erkennbaren Lehren wird hier auf den einschlägigen Stand der Technik verwiesen.An embodiment of the invention will be described below with reference to the drawing. This is not intended to represent the embodiment to scale, but the drawing is executed in a schematized and / or slightly distorted form. With regard to additions to the teachings directly recognizable from the drawing reference is made here to the relevant prior art.

Im Einzelnen zeigt die Zeichnung:

Figur 1
eine Schnittdarstellung durch eine Strömungsmaschine.
In detail, the drawing shows:
FIG. 1
a sectional view through a turbomachine.

Die in Figur 1 dargestellte Dampfturbine 1 ist eine Ausführungsform einer Strömungsmaschine. Die Dampfturbine 1 umfasst ein Außengehäuse 2 und ein Innengehäuse 3 auf. Innerhalb des Innengehäuses 3 ist ein nicht näher dargestellter Rotor um eine Rotationsachse 4 drehbar gelagert. Das Innengehäuse 3 umfasst ein erstes Teil 3a und ein zweites Teil 3b. Das erste Teil 3a und das zweite Teil 3b wird über eine vertikale Teilfuge 5 ausgebildet. Das erste Teil 3a und das zweite Teil 3b wird über nicht näher dargestellte Teilfugenschrauben an der vertikalen Teilfuge 5 zusammengehalten. Die vertikale Teilfuge 5 bezieht sich dabei auf eine horizontale Linie 6, die im Betrieb der natürlichen Horizontalen entspricht. Die vertikale Teilfuge 5 muss hierbei nicht exakt um 90° gegenüber der horizontalen Linie 6 gedreht sein. Vielmehr kann die vertikale Teilfuge in einem Winkelbereich von -10° bis +10° gegenüber der theoretisch exakten vertikalen Linie, die 90° gegenüber der horizontalen Linie 6 gedreht ist, ausgebildet sein.The steam turbine 1 shown in FIG. 1 is an embodiment of a turbomachine. The steam turbine 1 comprises an outer housing 2 and an inner housing 3. Within the inner housing 3, a rotor, not shown, is rotatably mounted about a rotation axis 4. The inner housing 3 comprises a first part 3a and a second part 3b. The first part 3a and the second part 3b is formed via a vertical parting line 5. The first part 3a and the second part 3b is held together by not shown detail part screws on the vertical parting line 5. The vertical parting line 5 refers to a horizontal line 6, which corresponds to the natural horizontal in operation. The vertical parting line 5 does not have to be rotated exactly 90 ° with respect to the horizontal line 6. Rather, the vertical parting line in an angular range of -10 ° to + 10 ° relative to the theoretically exact vertical line, which is rotated 90 ° relative to the horizontal line 6, may be formed.

Das erste Teil 3a und das zweite Teil 3b weisen jeweils eine Einströmöffnung 7 auf, über die im Betrieb ein Dampf in einen nicht näher dargestellte Strömungskanal strömt. Das Außengehäuse 2 weist eine horizontale Teilfuge 8 auf. Daher weist das Außengehäuse 2 ein Oberteil 2a und ein Unterteil 2b auf. Die Dampfturbine 1 kann im Hochdruckbereich oder im Mitteldruckbereich eingesetzt werden.The first part 3a and the second part 3b each have an inflow opening 7, via which a steam flows in operation into a flow channel, not shown. The outer housing 2 has a horizontal parting line 8. Therefore, the outer case 2 has an upper part 2a and a lower part 2b. The steam turbine 1 can be used in the high pressure range or in the medium pressure range.

Claims (4)

  1. Steam turbine having a casing comprising an inner casing (3, 3a, 3b) and an outer casing (2, 2a, 2b), arranged around the inner casing (3, 3a, 3b), for a turbomachine, wherein the inner casing (3, 3a, 3b) comprises a first part (3a) and a second part (3b), wherein the outer casing has a first outer casing part (2a) and a second outer casing part (2b), wherein a horizontal parting joint (8) is formed between the first (2a) and second (2b) outer casing part, wherein the inner casing is designed to receive a rotor mounted so as to be able to rotate about an axis of rotation and, between the rotor and the inner casing, there is formed a flow duct, wherein the first part (3a) and/or the second part (3b) has inflow openings (7)
    characterized in that a vertical parting joint (5) is formed between the first part (3a) and the second part (3b).
  2. Turbomachine according to Claim 1,
    wherein the vertical parting joint (5) is rotated through 90° with respect to the horizontal parting joint (8).
  3. Steam turbine according to Claim 1 or 2,
    wherein the inner casing (3, 3a, 3b) is designed to receive a rotor mounted so as to be able to rotate about an axis of rotation (4).
  4. Steam turbine according to one of the preceding claims,
    wherein the first part (3a) and the second part (3b) are connected to one another by means of parting joint screws.
EP10790396.5A 2009-12-08 2010-12-07 Internal casing for a steam turbine Not-in-force EP2510195B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10790396.5A EP2510195B1 (en) 2009-12-08 2010-12-07 Internal casing for a steam turbine

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09015210A EP2333253A1 (en) 2009-12-08 2009-12-08 Internal casing for a turbo-machine
EP10790396.5A EP2510195B1 (en) 2009-12-08 2010-12-07 Internal casing for a steam turbine
PCT/EP2010/069010 WO2011069982A1 (en) 2009-12-08 2010-12-07 Inner housing for a flow machine

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EP2510195B1 true EP2510195B1 (en) 2016-03-23

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EP09015210A Withdrawn EP2333253A1 (en) 2009-12-08 2009-12-08 Internal casing for a turbo-machine
EP10790396.5A Not-in-force EP2510195B1 (en) 2009-12-08 2010-12-07 Internal casing for a steam turbine

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EP09015210A Withdrawn EP2333253A1 (en) 2009-12-08 2009-12-08 Internal casing for a turbo-machine

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EP (2) EP2333253A1 (en)
CN (1) CN102648335A (en)
PL (1) PL2510195T3 (en)
WO (1) WO2011069982A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006027237A1 (en) * 2005-06-14 2006-12-28 Alstom Technology Ltd. Steam turbine for a power plant has guide blade rows that are arranged on a single blade ring which is in turn arranged in the inner casing

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CH125062A (en) * 1927-03-16 1928-03-16 Oerlikon Maschf High pressure steam or gas turbine.
JPS5227282B2 (en) * 1970-11-05 1977-07-19
JPH0621521B2 (en) 1983-06-10 1994-03-23 株式会社日立製作所 Main structure of steam turbine main steam inlet
EP0891471B1 (en) * 1996-04-11 2002-06-26 Siemens Aktiengesellschaft Thrust-compensating process and device for turbomachines
US6609881B2 (en) * 2001-11-15 2003-08-26 General Electric Company Steam turbine inlet and methods of retrofitting
US6964554B2 (en) * 2003-03-31 2005-11-15 Siemens Westinghouse Power Corporation Drop-in nozzle block for steam turbine
DE10336978B3 (en) * 2003-08-12 2005-01-13 Mtu Friedrichshafen Gmbh Carrier housing for exhaust gas turbo-supercharger
DE10353451A1 (en) 2003-11-15 2005-06-16 Alstom Technology Ltd Steam turbine and method for producing such a steam turbine
JP2006016976A (en) * 2004-06-30 2006-01-19 Toshiba Corp Turbine nozzle support device and steam turbine

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
DE102006027237A1 (en) * 2005-06-14 2006-12-28 Alstom Technology Ltd. Steam turbine for a power plant has guide blade rows that are arranged on a single blade ring which is in turn arranged in the inner casing

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Publication number Publication date
EP2333253A1 (en) 2011-06-15
EP2510195A1 (en) 2012-10-17
WO2011069982A1 (en) 2011-06-16
PL2510195T3 (en) 2016-10-31
CN102648335A (en) 2012-08-22

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