EP1022439A1 - Steam or gas turbine casing - Google Patents

Steam or gas turbine casing Download PDF

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Publication number
EP1022439A1
EP1022439A1 EP99810037A EP99810037A EP1022439A1 EP 1022439 A1 EP1022439 A1 EP 1022439A1 EP 99810037 A EP99810037 A EP 99810037A EP 99810037 A EP99810037 A EP 99810037A EP 1022439 A1 EP1022439 A1 EP 1022439A1
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EP
European Patent Office
Prior art keywords
flanges
housing
facing away
wall thickness
facing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99810037A
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German (de)
French (fr)
Other versions
EP1022439B1 (en
Inventor
Christoph Dr. Beerens
Josef Huster
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.)
General Electric Technology GmbH
Original Assignee
ABB Alstom Power Switzerland Ltd
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 ABB Alstom Power Switzerland Ltd filed Critical ABB Alstom Power Switzerland Ltd
Priority to EP99810037A priority Critical patent/EP1022439B1/en
Priority to DE59909395T priority patent/DE59909395D1/en
Priority to US09/482,082 priority patent/US6336789B1/en
Priority to JP2000008323A priority patent/JP4347977B2/en
Priority to RU2000101728/06A priority patent/RU2244835C2/en
Priority to CN00100518.9A priority patent/CN1268833C/en
Publication of EP1022439A1 publication Critical patent/EP1022439A1/en
Application granted granted Critical
Publication of EP1022439B1 publication Critical patent/EP1022439B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

Definitions

  • the invention relates to a housing for a steam or gas turbine, which consists of a shell and two flanges.
  • Compressor housings for gas turbines which consist of a shell and two flanges. These housings have a pseudo flange in the upper and lower area of the shell.
  • these have the disadvantage that, when the gas turbine is in operation, greater radial expansions occur due to the higher mean temperature in the area of the pseudo flange, and thus the housing deviates from its round shape.
  • Housing for steam turbines are also known which consist of a shell and two flanges and which have vertical slots in the horizontal flanges.
  • expensive constructions and assembly devices should be avoided.
  • the object is achieved in that the shell has different wall thicknesses in an upper area facing away from the flanges, in two middle areas and in two lower areas facing towards the flanges, the wall thickness of the upper area facing away from the flanges compared to the wall thickness of the lower areas facing the flanges is reinforced and the wall thickness of the middle areas is variable, so that the upper area facing away from the flanges and the lower areas facing the flanges merge continuously into one another.
  • An advantage of this invention is that the variation in the wall thickness of the shell of the housing significantly reduces deformation into an ellipsoidal shape both in the radial direction and in the axial direction.
  • the housing thus has a small radial clearance between the housing and the ends of the turbine blades and thus has a significantly improved efficiency compared to the prior art. Overall, the invention achieves an improved efficiency of 0.2% to 0.3% of a steam turbine.
  • the single figure shows a section through an embodiment of a housing according to the invention.
  • the single figure shows a section through an embodiment of a Housing 1 according to the invention, which is used for steam or gas turbines becomes.
  • the entire case consists of two equal halves, only one of which is shown.
  • the housing 1 consists of a shell 2 and two flanges 3, which for attachment to the flanges of the second half of the Housing 1 is used.
  • the wall thickness of the shell 2 varies in different areas.
  • An upper area 5 facing away from the flanges is opposite the lower one Flanges facing areas 7 reinforced.
  • In the illustrated embodiment corresponds to the wall thickness of the upper region 5 facing away from the flanges 1.5 times the wall thickness of the lower areas facing the flanges 7.
  • the reinforcement of the area 5 facing away from the flanges no more than twice the Wall thickness of the lower areas 7 facing the flanges should have.
  • the upper area 5 facing away from the flanges and the lower area facing the flanges facing regions 7 are marked on each side by a central region 6 connected.
  • the wall thickness of these middle areas 6 varies, so that on each Since the two adjacent areas 5,7 merge continuously.
  • the upper area facing away from the flanges 5 arranged at 45 ° around the central axis 4 of the housing 1. After that the middle area 6 adjoins on both sides with 15 °.

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

Abstract

The casing consists of a shell (2) and two flanges (3). The shell has different wall thicknesses in one upper region (5) facing away from the flanges, in two middle regions (6) and in two lower regions (7) facing toward the flanges. The upper regions are thicker than the lower ones, and the thickness of the middle regions is variable.

Description

TECHNISCHES GEBIETTECHNICAL AREA

Die Erfindung betrifft ein Gehäuse für eine Dampf- oder eine Gasturbine, welches aus einer Schale und zwei Flanschen besteht.The invention relates to a housing for a steam or gas turbine, which consists of a shell and two flanges.

STAND DER TECHNIKSTATE OF THE ART

Es sind Verdichtergehäuse für Gasturbinen bekannt, welche aus einer Schale und zwei Flanschen bestehen. Diese Gehäuse weisen im oberen und unteren Bereich der Schale einen Pseudoflansch auf. Diese haben aber den Nachteil, dass bei Betrieb der Gasturbine aufgrund der höheren mittleren Temperatur im Bereich des Pseudoflanschs grössere radiale Dehnungen auftreten und somit das Gehäuse von seiner runden Form abweicht. Diese Verformungen führen zu einem verringerten Wirkungsgrad, da sich der Spalt zwischen dem Gehäuse und den Enden der Turbinenschaufeln vergrössert und an dieser Stelle Dampf oder Luft ungehindert durchströmen kann, ohne Arbeit an der Turbine zu verrichten.
Es sind auch Gehäuse für Dampfturbinen bekannt, welche aus einer Schale und zwei Flanschen bestehen und welche in den horizontalen Flanschen vertikale Schlitze aufweisen. Das führt aber aufgrund der Temperaturverteilung in der Schale und den Flanschen dazu, dass die Schale durch die Befestigung der massiven Flansche mit Schrauben starken Verformungen unterworfen ist. Diese Verformungen wirken sich sowohl radial als auch axial auf das Gehäuse aus. Radial wird aus der runden Schalenform eine ellipsoide Form, indem sich die Schale nach oben ausdehnt und die beiden Flansche leicht nach innen verschoben werden. Axial wirken sich die radialen Effekte aufgrund der unterschiedlichen Temperaturverteilung innerhalb des Gehäuses verschieden aus und führen so ebenfalls zu einer Verformung. Diese Verformungen führen durch ein notwendiger vergrössertes Radialspiel zwischen dem Gehäuse und den Enden der Turbinenschaufeln zu einem geringeren Wirkungsgrad, da vermehrt Dampf ohne Arbeit an der Turbine zu verrichten durchströmen kann. Die Schlitze, welche die Trennflansche aufweisen, mindern insbesondere die axiale Verformung des Gehäuses, sind aber alleine nicht ausreichend, um die radialen Verformungen und damit den verringerten Wirkungsgrad zu verhindern.
Weiter sind Konstruktionen bekannt, welche die Verformung eines Dampfturbinengehäuses durch Schrumpfringe verhindern. Diese Konstruktionen haben aber den Nachteil, dass sie sehr teuer und spezielle Montagevorrichtungen dafür nötig sind.Compressor housings for gas turbines are known which consist of a shell and two flanges. These housings have a pseudo flange in the upper and lower area of the shell. However, these have the disadvantage that, when the gas turbine is in operation, greater radial expansions occur due to the higher mean temperature in the area of the pseudo flange, and thus the housing deviates from its round shape. These deformations lead to reduced efficiency, since the gap between the housing and the ends of the turbine blades increases and steam or air can flow through at this point without hindrance, without doing any work on the turbine.
Housing for steam turbines are also known which consist of a shell and two flanges and which have vertical slots in the horizontal flanges. However, due to the temperature distribution in the shell and the flanges, this means that the shell is subjected to severe deformations by fastening the solid flanges with screws. These deformations affect the housing both radially and axially. Radially, the round shell shape becomes an ellipsoidal shape by expanding the shell upwards and slightly displacing the two flanges inwards. The radial effects have different axial effects due to the different temperature distribution within the housing and thus also lead to deformation. Due to the necessary increased radial play between the housing and the ends of the turbine blades, these deformations lead to lower efficiency, since more steam can flow through without performing work on the turbine. The slots which have the separating flanges in particular reduce the axial deformation of the housing, but are not sufficient on their own to prevent the radial deformations and thus the reduced efficiency.
Constructions are also known which prevent the deformation of a steam turbine housing by means of shrink rings. However, these designs have the disadvantage that they are very expensive and special assembly devices are required for this.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Es ist die Aufgabe der Erfindung, ein Gehäuse für eine Dampf- oder eine Gasturbine zu konstruieren, welches seine runde Form in Betrieb beibehält oder nur verhältnismässig geringe Verformungen aufweist, um so das Radialspiel zwischen dem Gehäuse und den Enden der Turbinenschaufeln zu verkleinern und den damit verbundenen geringeren Wirkungsgrad zu verhindern. Zudem sollen teure Konstruktionen und Montagevorrichtungen vermieden werden.
Erfindungsgemäss wird die Aufgabe dadurch gelöst, dass die Schale verschiedene Wandstärken in einem oberen, den Flanschen abgewandten Bereich, in zwei mittleren Bereichen und in zwei unteren, den Flanschen zugewandten Bereichen aufweist, wobei die Wandstärke des oberen, den Flanschen abgewandten Bereichs gegenüber der Wandstärke der unteren, den Flanschen zugewandten Bereiche verstärkt ist und die Wandstärke der mittleren Bereiche variabel ist, so dass der obere, den Flanschen abgewandte Bereich und die unteren, den Flanschen zugewandten Bereiche stetig ineinander übergehen.
Ein Vorteil dieser Erfindung liegt darin, dass durch die Variation der Wandstärke der Schale des Gehäuses eine Verformung in eine ellipsoide Form sowohl in radialer Richtung als auch in axialer Richtung deutlich vermindert wird. Das Gehäuse hat somit einen geringes Radialspiel zwischen dem Gehäuse und den Enden der Turbinenschaufeln und weist dadurch einen wesentlich verbesserten Wirkungsgrad gegenüber dem Stand der Technik auf, Insgesamt wird durch die Erfindung ein verbesserter Wirkungsgrad von 0.2 % bis 0.3 % einer Dampfturbine erreicht.It is the object of the invention to construct a housing for a steam or gas turbine, which maintains its round shape in operation or has only relatively small deformations, so as to reduce the radial play between the housing and the ends of the turbine blades and thus with them to prevent associated lower efficiency. In addition, expensive constructions and assembly devices should be avoided.
According to the invention the object is achieved in that the shell has different wall thicknesses in an upper area facing away from the flanges, in two middle areas and in two lower areas facing towards the flanges, the wall thickness of the upper area facing away from the flanges compared to the wall thickness of the lower areas facing the flanges is reinforced and the wall thickness of the middle areas is variable, so that the upper area facing away from the flanges and the lower areas facing the flanges merge continuously into one another.
An advantage of this invention is that the variation in the wall thickness of the shell of the housing significantly reduces deformation into an ellipsoidal shape both in the radial direction and in the axial direction. The housing thus has a small radial clearance between the housing and the ends of the turbine blades and thus has a significantly improved efficiency compared to the prior art. Overall, the invention achieves an improved efficiency of 0.2% to 0.3% of a steam turbine.

Weitere Ausgestaltungsmöglichkeiten der Erfindung sind Gegenstände der abhängigen Ansprüche.Further design options of the invention are the subject of dependent claims.

KURZE BESCHREIBUNG DER ZEICHNUNGBRIEF DESCRIPTION OF THE DRAWING

Die einzige Figur zeigt einen Schnitt durch eine Ausführungsform eines erfindungsgemässen Gehäuses.The single figure shows a section through an embodiment of a housing according to the invention.

WEG ZUR AUSFÜHRUNG DER ERFINDUNGWAY OF CARRYING OUT THE INVENTION

Die einzige Figur zeigt einen Schnitt durch eine Ausführungsform eines erfindungsgemässen Gehäuses 1, welches für Dampf- oder Gasturbinen verwendet wird. Das gesamte Gehäuse besteht aus zwei gleichen Hälften, von denen nur eine dargestellt ist. Das Gehäuse 1 besteht aus einer Schale 2 und zwei Flanschen 3, welche zur Befestigung an den Flanschen der nicht dargestellten zweite Hälfte des Gehäuses 1 dient. Die Wandstärke der Schale 2 variiert in verschiedenen Bereichen. Ein oberer, den Flanschen abgewandter Bereich 5 ist gegenüber den unteren, den Flanschen zugewandten Bereichen 7 verstärkt. In der dargestellten Ausführungsform entspricht die Wanddicke des oberen, den Flanschen abgewandten Bereichs 5 der 1.5fachen Wandstärke der unteren, den Flanschen zugewandten Bereiche 7. Im welchem Masse der obere Bereich verstärkt wird, kann aber verschieden sein und hängt von der Auslegung der Turbine und somit vom Betriebsdruck und von der Betriebstemperatur ab. Es hat sich allerdings gezeigt, dass die Verstärkung des oberen, den Flanschen abgewandten Bereichs 5 nicht mehr als das zweifache der Wandstärke der unteren, den Flanschen zugewandten Bereiche 7 haben sollte. Der obere, den Flanschen abgewandte Bereich 5 und die unteren, den Flanschen zugewandte Bereiche 7 werden auf jeder Seite durch einen mittleren Bereich 6 verbunden. Die Wandstärke dieser mittleren Bereiche 6 variiert, so dass auf jeder Seite beide angrenzenden Bereiche 5,7 stetig ineinander übergehen. Vorteilhaft ist im dargestellten Ausführungsbeispiel der obere, den Flanschen abgewandte Bereich 5 mit 45° um die mittlere Achse 4 des Gehäuses 1 angeordnet. Im Anschluss daran schliesst sich zu beiden Seiten der mittlere Bereich 6 mit 15° an. Es sind aber auch andere Winkel denkbar, um eine erfindungsgemässe Wirkung der Konstruktion zu erhalten. Da die mittleren Bereiche 6 und besonders der obere, den Flanschen abgewandte Bereich 5 durch die dickere Wandstärke steifer als die nicht verstärkten unteren, den Flanschen zugewandten Bereiche 7 sind, lassen sie während des Betriebs aufgrund der Temperaturverteilung weniger Verformungen zu. Die unteren, den Flanschen zugewandten Bereiche 7 lassen sich mehr verformen und wirken wie ein Gelenk, welches zwischen den sehr massiv ausgearbeiteten und mit Schrauben befestigten Flanschen 3 und den teilverstärkten mittleren Bereichen 6 bzw. dem verstärkten oberen, den Flanschen abgewandten Bereich 5 ausgleichend wirkt. Insgesamt führt dies zu kleineren radialen und axialen Verformungen des Gehäuses 1 und so bleibt das Gehäuse 1 bei Betrieb der Turbine deutlich runder. Durch ein kleineres Radialspiel zwischen dem Gehäuse 1 und den Enden der nicht dargestellten Turbinenschaufeln wird so der Wirkungsgrad deutlich erhöht.The single figure shows a section through an embodiment of a Housing 1 according to the invention, which is used for steam or gas turbines becomes. The entire case consists of two equal halves, only one of which is shown. The housing 1 consists of a shell 2 and two flanges 3, which for attachment to the flanges of the second half of the Housing 1 is used. The wall thickness of the shell 2 varies in different areas. An upper area 5 facing away from the flanges is opposite the lower one Flanges facing areas 7 reinforced. In the illustrated embodiment corresponds to the wall thickness of the upper region 5 facing away from the flanges 1.5 times the wall thickness of the lower areas facing the flanges 7. In the mass of the upper area can be different and depends on the design of the turbine and thus on the operating pressure and the Operating temperature from. However, it has been shown that the reinforcement of the area 5 facing away from the flanges no more than twice the Wall thickness of the lower areas 7 facing the flanges should have. The upper area 5 facing away from the flanges and the lower area facing the flanges facing regions 7 are marked on each side by a central region 6 connected. The wall thickness of these middle areas 6 varies, so that on each Since the two adjacent areas 5,7 merge continuously. It is advantageous in the illustrated embodiment, the upper area facing away from the flanges 5 arranged at 45 ° around the central axis 4 of the housing 1. After that the middle area 6 adjoins on both sides with 15 °. But there are also other angles are conceivable in order to achieve an effect of the construction according to the invention receive. Since the middle areas 6 and especially the upper, the flanges area 5 facing away from the thicker wall thickness stiffer than the non-reinforced lower, the flanges facing areas 7, let them during the Operating due to the temperature distribution less deformation. The lower, the regions 7 facing the flanges can be deformed and act like a joint that is between the very solidly worked out and with screws attached flanges 3 and the partially reinforced middle regions 6 and the reinforced upper area 5 facing away from the flanges has a compensating effect. Overall, this leads to smaller radial and axial deformations of the housing 1 and so the housing 1 remains significantly rounder when the turbine is in operation. Through a smaller radial clearance between the housing 1 and the ends of the not turbine blades shown, the efficiency is significantly increased.

BEZUGSZEICHENLISTEREFERENCE SIGN LIST

11
Gehäusecasing
22nd
SchaleBowl
33rd
Flanschflange
44th
Mittlere AchseMiddle axis
55
Oberer Bereichupper area
66
Mittlere BereicheMiddle areas
77
Untere BereicheLower areas

Claims (4)

Gehäuse (1) für eine Dampf- oder eine Gasturbine, bestehend aus einer Schale (2) und zwei Flanschen (3),
dadurch gekennzeichnet, dass
die Schale (2) verschiedene Wandstärken in einem oberen, den Flanschen abgewandten Bereich (5), in zwei mittleren Bereichen (6) und in zwei unteren, den Flanschen zugewandten Bereichen (7) aufweist, wobei die Wandstärke des oberen, den Flanschen abgewandten Bereichs (5) gegenüber der Wandstärke der unteren, den Flanschen zugewandten Bereiche (7) verstärkt ist und die Wandstärke der mittleren Bereiche (6) variabel ist, so dass der obere, den Flanschen abgewandte Bereich (5) und die unteren, den Flanschen zugewandten Bereiche (7) stetig ineinander übergehen. Housing (1) for a steam or gas turbine, consisting of a shell (2) and two flanges (3),
characterized in that
the shell (2) has different wall thicknesses in an upper area (5) facing away from the flanges, in two middle areas (6) and in two lower areas (7) facing the flanges, wherein the wall thickness of the upper region (5) facing away from the flanges is reinforced compared to the wall thickness of the lower regions (7) facing towards the flanges and the wall thickness of the middle regions (6) is variable, so that the upper region (5) facing away from the flanges and the lower regions (7) facing towards the flanges continuously merge into one another. Gehäuse (1) nach Anspruch 1,
dadurch gekennzeichnet, dass
der obere, den Flanschen abgewandte Bereich (5) in einem Winkel von 45° um die Mittelachse (4) des Gehäuses (1) angeordnet ist und die mittleren Bereiche (6) sich mit einem Winkel von 15° daran anschliessen.Housing (1) according to claim 1,
characterized in that
the upper region (5) facing away from the flanges is arranged at an angle of 45 ° around the central axis (4) of the housing (1) and the central regions (6) adjoin it at an angle of 15 °. Gehäuse (1) nach Anspruch 3
dadurch gekennzeichnet, dass
die Wandstärke des oberen, den Flanschen abgewandten Bereichs (5) maximal das 2fache der Wandstärke der unteren, den Flanschen abgewandten Bereiche (7) hat.Housing (1) according to claim 3
characterized in that
the wall thickness of the upper area (5) facing away from the flanges has a maximum of twice the wall thickness of the lower area (7) facing away from the flanges. Gehäuse (1) nach Anspruch 3,
dadurch gekennzeichnet, dass
die Wandstärke des oberen, den Flanschen abgewandten Bereichs (5) das 1.5fache der Wandstärke der unteren, den Flanschen abgewandten Bereiche (7) hat.Housing (1) according to claim 3,
characterized in that
the wall thickness of the upper area (5) facing away from the flanges has 1.5 times the wall thickness of the lower area (7) facing away from the flanges.
EP99810037A 1999-01-20 1999-01-20 Steam or gas turbine casing Expired - Lifetime EP1022439B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP99810037A EP1022439B1 (en) 1999-01-20 1999-01-20 Steam or gas turbine casing
DE59909395T DE59909395D1 (en) 1999-01-20 1999-01-20 Housing for a steam or gas turbine
US09/482,082 US6336789B1 (en) 1999-01-20 2000-01-13 Casing for a steam or gas turbine
JP2000008323A JP4347977B2 (en) 1999-01-20 2000-01-17 Casing for steam turbine or gas turbine
RU2000101728/06A RU2244835C2 (en) 1999-01-20 2000-01-19 Casing for steam or gas turbine
CN00100518.9A CN1268833C (en) 1999-01-20 2000-01-20 Casing of turbine or gas turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99810037A EP1022439B1 (en) 1999-01-20 1999-01-20 Steam or gas turbine casing

Publications (2)

Publication Number Publication Date
EP1022439A1 true EP1022439A1 (en) 2000-07-26
EP1022439B1 EP1022439B1 (en) 2004-05-06

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Application Number Title Priority Date Filing Date
EP99810037A Expired - Lifetime EP1022439B1 (en) 1999-01-20 1999-01-20 Steam or gas turbine casing

Country Status (6)

Country Link
US (1) US6336789B1 (en)
EP (1) EP1022439B1 (en)
JP (1) JP4347977B2 (en)
CN (1) CN1268833C (en)
DE (1) DE59909395D1 (en)
RU (1) RU2244835C2 (en)

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CH698879B1 (en) * 2006-06-30 2009-11-30 Alstom Technology Ltd Turbomachine.
EP2189630A1 (en) * 2008-11-19 2010-05-26 Siemens Aktiengesellschaft Gas turbine, guide vane support for such a gas turbine and gas or steam turbine plant with such a gas turbine

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DE60310054T2 (en) * 2003-06-26 2007-05-03 Alstom Technology Ltd. A reflective target holder used to measure the deflection of a turbine housing
EP1541810A1 (en) * 2003-12-11 2005-06-15 Siemens Aktiengesellschaft Use of a thermal barrier coating for a part of a steam turbine and a steam turbine
DE102005015150A1 (en) * 2005-03-31 2006-10-05 Alstom Technology Ltd. machine housing
US7681601B2 (en) * 2005-08-24 2010-03-23 Alstom Technology Ltd. Inner casing of a rotating thermal machine
US8128353B2 (en) * 2008-09-30 2012-03-06 General Electric Company Method and apparatus for matching the thermal mass and stiffness of bolted split rings
CH700679A1 (en) * 2009-03-17 2010-09-30 Alstom Technology Ltd Support for a turbine.
EP2423454A1 (en) * 2010-08-25 2012-02-29 Siemens Aktiengesellschaft Casing for a turbomachine and method of manufacture
US8342009B2 (en) 2011-05-10 2013-01-01 General Electric Company Method for determining steampath efficiency of a steam turbine section with internal leakage
US9279342B2 (en) 2012-11-21 2016-03-08 General Electric Company Turbine casing with service wedge
US9260281B2 (en) 2013-03-13 2016-02-16 General Electric Company Lift efficiency improvement mechanism for turbine casing service wedge
JP2016113992A (en) * 2014-12-16 2016-06-23 三菱重工業株式会社 Pressure container and turbine

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Cited By (6)

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CH698879B1 (en) * 2006-06-30 2009-11-30 Alstom Technology Ltd Turbomachine.
US7762764B2 (en) 2006-06-30 2010-07-27 Alstom Technology Ltd. Turbomachine
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EP2189630A1 (en) * 2008-11-19 2010-05-26 Siemens Aktiengesellschaft Gas turbine, guide vane support for such a gas turbine and gas or steam turbine plant with such a gas turbine
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US9074490B2 (en) 2008-11-19 2015-07-07 Siemens Aktiengesellschaft Gas turbine

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JP2000213305A (en) 2000-08-02
JP4347977B2 (en) 2009-10-21
CN1261643A (en) 2000-08-02
DE59909395D1 (en) 2004-06-09
CN1268833C (en) 2006-08-09
RU2244835C2 (en) 2005-01-20
EP1022439B1 (en) 2004-05-06
US6336789B1 (en) 2002-01-08

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