EP2344730B1 - Carter intérieur pour une turbomachine - Google Patents

Carter intérieur pour une turbomachine Download PDF

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Publication number
EP2344730B1
EP2344730B1 EP09748321A EP09748321A EP2344730B1 EP 2344730 B1 EP2344730 B1 EP 2344730B1 EP 09748321 A EP09748321 A EP 09748321A EP 09748321 A EP09748321 A EP 09748321A EP 2344730 B1 EP2344730 B1 EP 2344730B1
Authority
EP
European Patent Office
Prior art keywords
inner housing
flow
housing
turbomachine
area
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
Application number
EP09748321A
Other languages
German (de)
English (en)
Other versions
EP2344730A1 (fr
Inventor
Thomas Müller
Heinz Dallinger
Andreas Ulma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP09748321A priority Critical patent/EP2344730B1/fr
Publication of EP2344730A1 publication Critical patent/EP2344730A1/fr
Application granted granted Critical
Publication of EP2344730B1 publication Critical patent/EP2344730B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • F01D25/14—Casings modified therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—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
    • F01D25/26—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
    • F01D3/00—Machines or engines with axial-thrust balancing effected by working-fluid
    • F01D3/02—Machines or engines with axial-thrust balancing effected by working-fluid characterised by having one fluid flow in one axial direction and another fluid flow in the opposite direction
    • 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
    • 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

Definitions

  • the invention relates to a turbomachine comprising a rotor rotatably mounted about a rotation axis, an inner and outer inner housing arranged around the rotor and an outer housing arranged around the inner and outer inner housings, the outer inner housing being arranged around the inner inner housing along the axis of rotation a first flow region for flowing a flow medium in a flow direction is formed between the inner inner casing and the rotor, wherein, viewed in the flow direction, a second flow region is formed between the outer inner casing and the rotor after the first flow region.
  • 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.
  • nickel-base alloys are suitable because they withstand the stresses occurring at high temperatures.
  • the use of such a nickel-based alloy is associated with new challenges.
  • the cost of nickel-base alloys is comparatively high and, in addition, the manufacturability of nickel-base alloys, e.g. limited by limited casting possibilities.
  • 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.
  • the inner housing is in this case formed in an inner inner housing and an outer inner housing.
  • the inner inner housing is located in the region of the inflow area and must therefore be able to withstand the high temperatures and the high pressures. Therefore, the inner inner housing is made of a suitable material, such as e.g. formed of a nickel-based alloy. Between the inner inner housing and the rotor of the flow channel is formed.
  • the inner inner housing therefore has devices such as e.g. Grooves to carry in it vanes.
  • an outer inner housing is arranged to the inner inner inner housing. It is essential that between the inner inner housing and the outer inner housing, a cooling steam space is formed, which is acted upon by cooling medium.
  • the outer inner housing is designed in such a way that, viewed in the flow direction, it adjoins the inner inner housing and forms a boundary of the flow channel, wherein devices in the outer inner housing, such as, for example, are also provided. Grooves are provided to carry vanes can.
  • the outer inner casing is subjected to a vapor having a lower temperature and a lower pressure, so that the material of the outer inner casing must be less heat-resistant than the material of the inner inner casing.
  • the outer inner housing is formed of a less high-quality material.
  • an outer housing is arranged around the inner inner housing and the outer inner housing.
  • a fluidic connection is provided between the inner inner housing and the outer inner housing, with which it is possible to enter To convey cooling medium from the flow channel in the cooling steam space.
  • This cooling steam is thus removed from the flow channel, whereby the primary and the secondary stresses in the inner inner housing can be kept low.
  • Primary stresses are mechanical stresses that arise as a result of external loads, such as vapor pressures, weight forces, etc.
  • secondary voltages which are also referred to as thermal stresses, such mechanical stresses that arise as a result of unbalanced temperature fields or changes in thermal expansion.
  • the cooling steam located in the cooling steam space can also be used as insulation for the outer inner housing. Furthermore, a drainage line is provided which dissipates condensate occurring at standstill.
  • the steam turbine is designed as a double-flow steam turbine, whereby stresses and forces can be optimally coordinated for reasons of symmetry.
  • the sectional view through the turbomachine 1 shown essentially comprises an outer housing 2, an outer inner housing 3 arranged inside the outer housing 2 and an inner inner housing 4 arranged inside the outer inner housing 3.
  • a rotor 5 is rotatably supported about a rotation axis 6. Between the outer inner casing 3 and the rotor 5 and between the inner inner casing 4 and the rotor 5, a flow channel 7 is formed. For clarity, individual runners and vanes are not shown in detail. The vanes are arranged on the inner inner casing 4 and on the outer inner casing 3. On the rotor 5, the blades are arranged such that in the flow channel 7, the thermal energy of a live steam can be converted into rotational energy. Fresh steam flows via a live steam inlet region, not shown, first into a first flow region 8, which is arranged between the inner inner casing 4 and the rotor 5.
  • the inner inner housing 4 is formed of a nickel-based material.
  • the outer inner housing 3 may be formed of a less highly heat-resistant material.
  • the inner inner housing 4 is formed of a high-chromium steel comprising 9 to 10 wt% chromium, wherein the outer inner housing 3 is formed of a less high-quality material than the inner inner housing 4.
  • the outer inner housing 3 adjoins the inner inner housing 4. Between the outer inner casing 3 and the flow channel 7, a second flow region 10 is formed.
  • the outer inner housing 3 comprises devices, eg grooves for receiving the guide vanes.
  • the inner inner housing 4 is suspended in a manner not shown in the outer inner housing 3.
  • the outer inner casing is formed around the inner inner casing 4 in the region of the first flow region 8.
  • the outer inner housing 3 is in this case formed with respect to the axis of rotation 6 about the inner inner housing 4.
  • the outer inner casing 3 is not arranged around the inner inner casing 4 relative to the axis of rotation 6.
  • the first flow region 8 comprises the flow channel up to the point at which the inner inner housing 4 stops.
  • a fluidic connection 11 is arranged at the transition area between the first flow area 8 and the second flow area 10.
  • a relaxed steam from the flow channel 7 can thus flow through the fluidic connection 11 in a located between the inner inner housing 4 and the outer inner housing 3 cooling steam space 12.
  • the location of the fluidic connection 11 must therefore be suitably selected so that a cooling medium with a corresponding temperature and corresponding pressure flows via the fluidic connection 11 into the cooling steam space 12.
  • the outer inner casing 3 is comprised of a first outer inner casing top and a second lower outer inner casing part.
  • the outer inner housing 3 essentially comprises three sections that are shaped differently. Thus, in a first section, the inner housing is formed substantially parallel to the flow channel 9. This first region is more or less symmetrical in both the one and the other tide.
  • the second middle region of the outer inner housing 3 adjoins. This middle one Area is characterized by an initially radial orientation in order to form a cooling steam space 12 between the inner inner housing 4 and the outer inner housing 3 can.
  • a drainage line is provided, inter alia, in the cooling steam chamber 12, which dissipates condensate occurring at a standstill of the steam turbine.
  • FIG. 2 is an illustration of the steam turbine 1 to see in the flow direction.
  • the in FIG. 2 Section shown is performed approximately in the center 13 of the steam turbine 1.
  • the cooling steam located in the cooling steam space 12 is led out of the cooling steam space via a cooling steam discharge.
  • the cooling steam dissipation is in this case carried out in the outer inner housing 3 by means of a bore.
  • the cooling steam discharge line 14 is arranged in the upper part of the outer inner housing 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Claims (9)

  1. Turbomachine (1)
    comprenant un rotor (5) monté tournant autour d'un axe ( 6 ) de rotation, un carter (4) intérieur intérieur disposé autour du rotor ( 5 ) et un carter (3) intérieur extérieur et un carter (2) extérieur disposé autour du carter intérieur intérieur et du carter ( 4 ) intérieur extérieur, dans laquelle entre le carter (4) intérieur intérieur et le rotor ( 15 ) est formée une première zone (3) d'écoulement pour l'écoulement d'un milieu en écoulement dans un sens (9) d'écoulement et, considéré dans le sens d'écoulement, après la première zone ( 8 ) d'écoulement, une deuxième zone ( 10) d'écoulement est formée entre le carter (3) intérieur extérieur et le rotor (5), dans laquelle entre le carter (3 ) intérieur extérieur et le rotor ( 5 ) ainsi qu'entre le carter (4) intérieur intérieur et le rotor ( 5 ) est formé un canal ( 7 ) d'écoulement ayant des aubes mobiles et des aubes directrices,
    dans laquelle le long de l'axe ( 6 ) de rotation le carter ( 3 ) intérieur extérieur est disposé autour du carter ( 4 ) intérieur intérieur seulement dans la zone de la première zone ( 8 ) d'écoulement,
    dans laquelle la turbomachine ( 1 ) est à double flux, dans laquelle des aubes directrices sont montées sur le carter ( 4 ) intérieur intérieur et sur le carter ( 3 ) intérieur extérieur,
    dans laquelle un conduit ( 14 ) d'évacuation de vapeur de refroidissement est formé pour faire sortir de l'espace ( 12 ) pour de la vapeur de refroidissement un milieu de refroidissement se trouvant dans l'espace ( 12 ) pour de la vapeur de refroidissement,
    dans laquelle le carter ( 3 ) intérieur extérieur comprend une partie supérieure de carter intérieur extérieur et une partie inférieure de carter intérieur extérieur,
    caractérisé en ce que le conduit ( 14 ) d'évacuation de vapeur de refroidissement est disposé dans la partie supérieure du carter intérieur extérieur.
  2. Turbomachine ( 1 ) suivant la revendication 1,
    dans laquelle un espace ( 12 ) pour de la vapeur de refroidissement est formée entre le carter ( 4 ) intérieur intérieur et le carter ( 3 ) intérieur extérieur.
  3. Turbomachine ( 1 ) suivant la revendication 2,
    dans laquelle entre le carter ( 4 ) intérieur intérieur et le carter ( 3 ) intérieur extérieur est formée une liaison ( 11 ) en technique d'écoulement entre la première et/ou la deuxième zone ( 8, 9 ) d'écoulement et l'espace ( 12 ) pour de la vapeur de refroidissement.
  4. Turbomachine ( 1 ) suivant l'une des revendications précédentes,
    dans laquelle le carter ( 4 ) intérieur intérieur est en matériau à base de nickel.
  5. Turbomachine ( 1 ) suivant l'une des revendications 1 à 3,
    dans laquelle le carter ( 4 ) intérieur intérieur est en un acier très chromé qui comprend de 9 à 10 % en poids de chrome.
  6. Turbomachine ( 1 ) suivant la revendication 5,
    dans laquelle le carter ( 3 ) intérieur extérieur est en un matériau de moindre valeur que le carter ( 4 ) intérieur intérieur.
  7. Turbomachine ( 1 ) suivant l'une des revendications précédentes,
    dans laquelle un dispositif de logement d'aubes directrices est prévu dans le carter ( 4 ) intérieur intérieur et dans le carter ( 3 ) intérieur extérieur.
  8. Turbomachine ( 1 ) suivant la revendication 7,
    dans laquelle les dispositifs sont constitués sous la forme de rainures.
  9. Turbomachine ( 1 ) suivant l'une des revendications précédentes,
    comprenant une zone d'afflux de vapeur fraîche,
    dans laquelle le carter ( 4 ) intérieur intérieur est disposé dans la zone de la zone d'afflux.
EP09748321A 2008-11-13 2009-11-03 Carter intérieur pour une turbomachine Not-in-force EP2344730B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09748321A EP2344730B1 (fr) 2008-11-13 2009-11-03 Carter intérieur pour une turbomachine

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08019820A EP2187004A1 (fr) 2008-11-13 2008-11-13 Boîtier intérieur pour une turbomachine
PCT/EP2009/064492 WO2010054951A1 (fr) 2008-11-13 2009-11-03 Carter intérieur pour une turbomachine
EP09748321A EP2344730B1 (fr) 2008-11-13 2009-11-03 Carter intérieur pour une turbomachine

Publications (2)

Publication Number Publication Date
EP2344730A1 EP2344730A1 (fr) 2011-07-20
EP2344730B1 true EP2344730B1 (fr) 2012-12-26

Family

ID=40791090

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08019820A Withdrawn EP2187004A1 (fr) 2008-11-13 2008-11-13 Boîtier intérieur pour une turbomachine
EP09748321A Not-in-force EP2344730B1 (fr) 2008-11-13 2009-11-03 Carter intérieur pour une turbomachine

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP08019820A Withdrawn EP2187004A1 (fr) 2008-11-13 2008-11-13 Boîtier intérieur pour une turbomachine

Country Status (5)

Country Link
US (1) US20110280720A1 (fr)
EP (2) EP2187004A1 (fr)
JP (1) JP5497055B2 (fr)
CN (1) CN102216569A (fr)
WO (1) WO2010054951A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10677092B2 (en) 2018-10-26 2020-06-09 General Electric Company Inner casing cooling passage for double flow turbine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2336506A1 (fr) * 2009-12-15 2011-06-22 Siemens Aktiengesellschaft Turbine a vapeur dans une construction à trois coque
EP2644843A1 (fr) * 2012-03-27 2013-10-02 Siemens Aktiengesellschaft Refroidissement à vis pour une turbomachine
EP2690253A1 (fr) * 2012-07-27 2014-01-29 Siemens Aktiengesellschaft Turbine à basse pression
US20140119886A1 (en) * 2012-10-31 2014-05-01 General Electric Company Turbine cowling system

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CA562942A (fr) * 1958-09-09 Westinghouse Electric Corporation Appareil de turbine a vapeur
DE1708011U (de) * 1954-03-23 1955-10-06 Gut Woellried Dampfturbine.
GB773430A (en) * 1954-04-28 1957-04-24 Siemens Ag Improvements in or relating to steam turbines
DE1270575B (de) * 1963-09-13 1968-06-20 Licentia Gmbh Geschweisstes Niederdruckgehaeuse fuer Dampfturbinen
CH524758A (de) * 1970-12-08 1972-06-30 Bbc Brown Boveri & Cie Mehrschaliges Turbinengehäuse für hohe Drücke und hohe Temperaturen
JPH0621521B2 (ja) * 1983-06-10 1994-03-23 株式会社日立製作所 蒸気タ−ビンの主蒸気入口構造
JP2984442B2 (ja) * 1991-11-15 1999-11-29 三菱重工業株式会社 ガスタービンの蒸気冷却方法及び装置
ATE250152T1 (de) * 1997-01-27 2003-10-15 Mitsubishi Heavy Ind Ltd Hochchromhaltiger, hitzebeständiger gussstahl und daraus hergestellter druckbehälter
JP2000282808A (ja) * 1999-03-26 2000-10-10 Toshiba Corp 蒸気タービン設備
US6752589B2 (en) * 2002-10-15 2004-06-22 General Electric Company Method and apparatus for retrofitting a steam turbine and a retrofitted steam turbine
JP4509664B2 (ja) * 2003-07-30 2010-07-21 株式会社東芝 蒸気タービン発電設備
DE10353451A1 (de) * 2003-11-15 2005-06-16 Alstom Technology Ltd Dampfturbine sowie Verfahren zum Herstellen einer solchen Dampfturbine
EP1559872A1 (fr) * 2004-01-30 2005-08-03 Siemens Aktiengesellschaft Turbomachine
EP1712745A1 (fr) * 2005-04-14 2006-10-18 Siemens Aktiengesellschaft Elément pour une turbine à vapeur, turbine à vapeur, utilisation et procédé de production d'un tel élément
JP4783053B2 (ja) * 2005-04-28 2011-09-28 株式会社東芝 蒸気タービン発電設備
DE102006027237A1 (de) * 2005-06-14 2006-12-28 Alstom Technology Ltd. Dampfturbine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10677092B2 (en) 2018-10-26 2020-06-09 General Electric Company Inner casing cooling passage for double flow turbine

Also Published As

Publication number Publication date
JP2012508844A (ja) 2012-04-12
EP2344730A1 (fr) 2011-07-20
WO2010054951A1 (fr) 2010-05-20
US20110280720A1 (en) 2011-11-17
JP5497055B2 (ja) 2014-05-21
CN102216569A (zh) 2011-10-12
EP2187004A1 (fr) 2010-05-19

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