EP2333252A1 - Boîtier interne en plusieurs parties pour une turbine à vapeur - Google Patents

Boîtier interne en plusieurs parties pour une turbine à vapeur Download PDF

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Publication number
EP2333252A1
EP2333252A1 EP09015211A EP09015211A EP2333252A1 EP 2333252 A1 EP2333252 A1 EP 2333252A1 EP 09015211 A EP09015211 A EP 09015211A EP 09015211 A EP09015211 A EP 09015211A EP 2333252 A1 EP2333252 A1 EP 2333252A1
Authority
EP
European Patent Office
Prior art keywords
inner housing
parting line
housing parts
parts
horizontal parting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09015211A
Other languages
German (de)
English (en)
Inventor
Henning Almstedt
Hans Classen
Benjamin Kloss-Grote
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 EP09015211A priority Critical patent/EP2333252A1/fr
Priority to CN201080055906.3A priority patent/CN102656340B/zh
Priority to EP10790397A priority patent/EP2510196A1/fr
Priority to PCT/EP2010/069015 priority patent/WO2011069986A1/fr
Publication of EP2333252A1 publication Critical patent/EP2333252A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F01D25/08—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
    • F01D25/243—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
    • 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
    • F05D2220/70—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 an inner housing for a turbomachine and to a method for producing an inner housing for a turbomachine.
  • 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-grade materials be used, especially in the area of the inflow and the first Leitschaufelnuten.
  • nickel-based alloys are suitable because they withstand the stresses occurring at high temperatures.
  • the use of such is Nickel-based alloy associated with new challenges.
  • the cost of nickel-based alloys is relatively high and also the manufacturability of nickel-based alloys, for example by limited casting possibility is limited.
  • 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.
  • Turbomachines such as steam turbines are designed for high steam temperatures and steam pressures. Partly the steam temperatures are above 650 ° C and the vapor pressures over 300bar. Such steam parameters require the use of materials that can withstand the thermal and mechanical stresses. It is known to use high-alloy chrome steels. Furthermore, it is known to use nickel-based materials.
  • a steam turbine essentially comprises a rotor rotatably mounted about a rotation axis and an inner housing arranged around the rotor and an outer housing arranged around the inner housing.
  • the Inner housing is usually made in two parts, ie, the inner housing has a lower inner housing part and an upper inner housing part, wherein between these two inner housing parts a horizontal parting line is formed.
  • the nickel-based materials used for such steam turbines are comparatively expensive. In addition, production is limited to low tonnages during pourability. In addition, made of one piece inner housing parts are relatively heavy and large.
  • the invention whose object is to provide an inner housing for a turbomachine, which is easy to manufacture. This object is achieved by an inner housing for a turbomachine, wherein the inner housing is formed from at least three inner housing parts.
  • the invention is based on the aspect that the limitation to two inner housing parts can be omitted and at least three inner housing parts are formed. As a result, the mass and the size of individual inner housing parts to be produced are reduced, which leads to a better handling of the inner housing parts. In addition, the inner housing parts can be made easier.
  • the inner housing for installation about a rotor aligned about a rotation axis and to divide the inner housing parts in the circumferential direction with respect to the axis of rotation.
  • the subdivision is also possible in the axial direction.
  • a subdivision in the circumferential direction with respect to the axis of rotation is more advantageous since mechanical forces can be better distributed.
  • the outer dimensions of circumferentially divided inner housing parts are smaller than axially divided inner housing parts.
  • the housing has a horizontal parting line.
  • the inner housing above the horizontal parting line comprises a one-piece upper inner housing part and below the horizontal parting line two lower inner housing parts.
  • the lower inner housing parts are larger than the upper inner housing parts, which is why the subdivision of the lower inner housing part into two parts represents an advantageous solution.
  • the two arranged below the horizontal parting joint lower inner housing parts are formed by a vertical parting line.
  • the two arranged below the horizontal parting joint lower inner housing parts can be formed substantially mirror-symmetrical.
  • the vertical parting line is arranged rotated by 90 ° with respect to the horizontal parting line.
  • the inner housing comprises four inner housing parts, wherein two inner housing parts are formed below the horizontal parting line and two inner housing parts above the horizontal parting line.
  • the division into four parts is advantageous.
  • Four parts are essentially almost the same size for symmetry reasons. This means that costs can be saved in the production, since the production of almost the same large components is less of a challenge than the production of components of different sizes.
  • the low unit weights of the inner housing parts reduce the risk of rejection per inner housing part. The economic risks are thereby reduced. Overall, this leads to a larger production capacity, ie a supplier base can be broadened.
  • the inner housing parts arranged above the horizontal parting line have a vertical parting line. Similar to the embodiment with three housing parts, in which the two lower inner housing parts have a vertical parting line, the two upper above the horizontal parting line formed inner housing parts on a vertical parting line. This means that the vertical parting line executed above the horizontal parting line is arranged essentially rotated 90 ° with respect to the horizontal parting line.
  • the components of the inner housing parts are characterized almost the same size, which leads to a further cost savings.
  • the vertical parting line is continuous. This means that the vertical parting line of the two upper inner housing parts and the vertical parting line of the two lower inner housing parts are in alignment. For symmetry reasons, mechanical forces are better distributed to the inner housing parts. Furthermore, the deformation is more homogeneous.
  • the inner housing parts are formed from a nickel-based material.
  • the nickel-based material is suitable for the mechanical and thermal stresses occurring in steam turbine operation.
  • the object directed to the method is achieved by a method for producing an inner housing for a turbomachine, wherein the inner housing of at least three inner housing cast components is manufactured.
  • the advantages arise in accordance with the advantages indicated for the device.
  • FIG. 1 shows a side view of an inner housing 1 of a turbomachine.
  • a turbomachine may be, for example, a steam turbine or a gas turbine.
  • the inner housing 1 comprises a horizontal parting line 2 and is formed substantially symmetrically about a rotation axis 3.
  • a rotor which is not shown in detail, rotatably mounted about the axis of rotation 3.
  • an upper inner housing part 5, 10, 11 and below the horizontal parting line 2 a lower inner housing part 6, 7 is formed.
  • the lower inner housing part 6, 7 under the horizontal parting line 2 has substantially an inflow 4.
  • FIG. 1 shows both a formed of three inner housing parts and one of four inner housing parts inner housing.
  • the FIG. 2 shows a section through the inner housing 1 from FIG. 1 along the line A.
  • the inner housing 1 comprises an upper inner housing part 5 and has below the horizontal parting line 2, a first lower inner housing part 6 and a second lower inner housing part 7. Between the first lower inner housing part 6 and the second lower inner housing part 7, a vertical parting line 8 is formed. This vertical parting line 8 is formed substantially at 90 ° relative to the horizontal parting line 2.
  • the first lower inner housing part 6 and the second lower inner housing part 7 can be fixedly connected to one another via screws. It is important that after a first connection, the lower inner housing parts 6 and 7 are not opened, as this can lead to the shift.
  • the FIG. 3 shows a perspective view of the inner housing FIG. 2 in an exploded view.
  • the inner housing 1 is formed from at least three inner housing parts 5, 6 and 7.
  • the inner housing 1 is designed for installation about a rotation axis 3 aligned rotor and the inner housing parts 5, 6 and 7 are divided in the circumferential direction 9 with respect to the rotation axis 3.
  • the inner casing 1 is formed of a nickel-based material.
  • FIG. 4 shows an alternative embodiment of the inner housing 1.
  • the difference from the inner housing 1 according to FIG. 2 is that now also the upper inner housing part 5 is divided into a first upper inner housing part 10 and a second upper inner housing part 11.
  • the first upper inner housing part 10 and the second upper inner housing part 11 is also separated from each other by a vertical parting line 12.
  • the vertical parting line 12 and the vertical parting line 8 are called continuous vertical parting line formed.
  • the inner housing 1 is formed such that the horizontal parting line 2 in the intended use of the steam turbine, which includes such an inner housing 1, is arranged substantially horizontally.
  • the vertical parting line 8, 12 and the horizontal parting line 2 are in this case arranged at 90 ° to each other rotated.
  • the first upper inner housing part 10 and the second upper inner housing part 11 can be firmly connected to each other by screws. Again, it is important to ensure that the vertical parting line 12 is not opened after a screw, so as not to change displacements and alignments.
  • FIG. 5 shows a perspective view of the inner housing 1 from FIG. 4 which comprises four inner housing parts 6, 7, 10, 11 and is divided in the circumferential direction 9.
  • the invention comprises in the exemplary embodiments three or four inner housing parts 6, 7, 10, 11 divided in the circumferential direction 9.
  • the inner housing can be formed into more than four inner housing parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP09015211A 2009-12-08 2009-12-08 Boîtier interne en plusieurs parties pour une turbine à vapeur Withdrawn EP2333252A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP09015211A EP2333252A1 (fr) 2009-12-08 2009-12-08 Boîtier interne en plusieurs parties pour une turbine à vapeur
CN201080055906.3A CN102656340B (zh) 2009-12-08 2010-12-07 用于汽轮机的多件式内壳体
EP10790397A EP2510196A1 (fr) 2009-12-08 2010-12-07 Carcasse intérieure en plusieurs parties pour turbine à vapeur
PCT/EP2010/069015 WO2011069986A1 (fr) 2009-12-08 2010-12-07 Carcasse intérieure en plusieurs parties pour turbine à vapeur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09015211A EP2333252A1 (fr) 2009-12-08 2009-12-08 Boîtier interne en plusieurs parties pour une turbine à vapeur

Publications (1)

Publication Number Publication Date
EP2333252A1 true EP2333252A1 (fr) 2011-06-15

Family

ID=42173216

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09015211A Withdrawn EP2333252A1 (fr) 2009-12-08 2009-12-08 Boîtier interne en plusieurs parties pour une turbine à vapeur
EP10790397A Withdrawn EP2510196A1 (fr) 2009-12-08 2010-12-07 Carcasse intérieure en plusieurs parties pour turbine à vapeur

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP10790397A Withdrawn EP2510196A1 (fr) 2009-12-08 2010-12-07 Carcasse intérieure en plusieurs parties pour turbine à vapeur

Country Status (3)

Country Link
EP (2) EP2333252A1 (fr)
CN (1) CN102656340B (fr)
WO (1) WO2011069986A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754833A (en) * 1970-11-05 1973-08-28 Kraftwerk Union Ag Device for radially centering turbine housings
DE3421067A1 (de) 1983-06-10 1984-12-13 Hitachi, Ltd., Tokio/Tokyo Hauptdampf-einlasseinheit fuer eine dampfturbine
WO2003044329A1 (fr) * 2001-11-20 2003-05-30 Alstom Technology Ltd Ensemble turbine a gaz
DE10353451A1 (de) 2003-11-15 2005-06-16 Alstom Technology Ltd Dampfturbine sowie Verfahren zum Herstellen einer solchen Dampfturbine
DE102006027237A1 (de) 2005-06-14 2006-12-28 Alstom Technology Ltd. Dampfturbine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905434A (en) * 1954-07-08 1959-09-22 Westinghouse Electric Corp Turbine apparatus
US5060842A (en) * 1990-04-09 1991-10-29 Westinghouse Electric Corp. Method for refurbishing nozzle block vanes of a steam turbine
JP4238337B2 (ja) * 2001-01-10 2009-03-18 富士電機システムズ株式会社 蒸気タービン
SE525879C2 (sv) * 2003-03-21 2005-05-17 Volvo Aero Corp Förfarande för framställning av en statorkomponent
US6964554B2 (en) * 2003-03-31 2005-11-15 Siemens Westinghouse Power Corporation Drop-in nozzle block for steam turbine
EP1744017A1 (fr) * 2005-07-14 2007-01-17 Siemens Aktiengesellschaft Turbine combinée à vapeur et procédé de fonctionnement d'une turbine combinée à vapeur
JP5180652B2 (ja) * 2008-03-31 2013-04-10 三菱重工業株式会社 蒸気タービンの車室構造

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754833A (en) * 1970-11-05 1973-08-28 Kraftwerk Union Ag Device for radially centering turbine housings
DE3421067A1 (de) 1983-06-10 1984-12-13 Hitachi, Ltd., Tokio/Tokyo Hauptdampf-einlasseinheit fuer eine dampfturbine
WO2003044329A1 (fr) * 2001-11-20 2003-05-30 Alstom Technology Ltd Ensemble turbine a gaz
DE10353451A1 (de) 2003-11-15 2005-06-16 Alstom Technology Ltd Dampfturbine sowie Verfahren zum Herstellen einer solchen Dampfturbine
DE102006027237A1 (de) 2005-06-14 2006-12-28 Alstom Technology Ltd. Dampfturbine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TANAKA ET AL.: "Advanced Design of Mitsubishi Large Steam Turbines", MITSUBISHI HEAVY INDUSTRIES, POWER GEN EUROPE, 6 May 2003 (2003-05-06)

Also Published As

Publication number Publication date
CN102656340A (zh) 2012-09-05
CN102656340B (zh) 2016-01-20
WO2011069986A1 (fr) 2011-06-16
EP2510196A1 (fr) 2012-10-17

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