US20110280720A1 - Inner Housing for a Turbomachine - Google Patents

Inner Housing for a Turbomachine Download PDF

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Publication number
US20110280720A1
US20110280720A1 US13/129,222 US200913129222A US2011280720A1 US 20110280720 A1 US20110280720 A1 US 20110280720A1 US 200913129222 A US200913129222 A US 200913129222A US 2011280720 A1 US2011280720 A1 US 2011280720A1
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US
United States
Prior art keywords
inner housing
flow
turbomachine
housing
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.)
Abandoned
Application number
US13/129,222
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English (en)
Inventor
Heinz Dallinger
Thomas Muller
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
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ULMA, ANDREAS, DALLINGER, HEINZ, MUELLER, THOMAS
Publication of US20110280720A1 publication Critical patent/US20110280720A1/en
Abandoned 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
    • 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 which is mounted such that it can rotate about a rotation axis, an inner inner housing and an outer inner housing which are arranged around the rotor, and an outer housing which is arranged around the inner and the outer inner housings, wherein the outer inner housing is arranged around the inner inner housing along the rotation axis, wherein the outer inner housing is arranged around the inner inner housing along the rotation axis, wherein a first flow area for a flow medium to flow in a flow direction is formed between the inner inner housing and the rotor, and wherein a second flow area is formed between the outer inner housing and the rotor downstream from the first flow area, seen in the flow direction.
  • a turbomachine means a steam turbine.
  • a steam turbine normally has a rotor, which is mounted such that it can rotate, and a housing which is arranged around the rotor.
  • a flow channel is formed between the rotor and the inner housing.
  • the housing in a steam turbine has to be able to carry out a number of functions.
  • the stator blades in the flow channel are arranged on the housing and, on the other hand, the inner housing must withstand the pressures and the temperatures of the flow medium for all load and special operating situations.
  • the flow medium is steam.
  • the housing must be designed such that inputs and outputs, which are also referred to as bleeds, are possible.
  • a further function which a housing must carry out is the capability to allow a shaft end to pass through the housing.
  • Nickel-based alloys are suitable for applications with fresh steam temperatures of more than 650° C., for example 700° C., since they withstand the loads which occur at high temperatures.
  • the use of a nickel-based alloy such as this is associated with new requirements.
  • the costs of nickel-based alloys are comparatively high and, furthermore, the capability to manufacture nickel-based alloys is restricted, for example because the casting capability is restricted. This means that the use of nickel-based materials must be minimized.
  • nickel-based materials are poor heat conductors. The temperature gradients across the wall thickness are therefore so great that thermal stresses are comparatively high.
  • the temperature difference between the inlet and outlet of the steam turbine rises when using nickel-based materials.
  • DE 342 1067 likewise discloses a multi-component inner housing structure, as does DE 103 53 451 A1.
  • the object of the invention is to offer a further possible way to design an inner housing such that it is suitable for high temperatures and pressures.
  • a major idea of the invention is to design a triple-casing steam turbine.
  • the inner housing is in this case fondled into an inner inner housing and an outer inner housing.
  • the inner inner housing is arranged in the area of the inlet-flow area, and must therefore withstand the high temperatures and the high pressures.
  • the inner inner housing is therefore formed from a suitable material, for example from a nickel-based alloy.
  • the flow channel is formed between the inner inner housing and the rotor.
  • the inner inner housing therefore has apparatuses such as grooves, in order to allow stator blades to be fitted therein.
  • An outer inner housing is arranged around the inner inner housing.
  • the essential feature in this case is that a cooling steam area is created between the inner inner housing and the outer inner housing, and cooling medium is applied to this area.
  • the outer inner housing is in this case designed such that it is adjacent to the inner inner housing, seen in the flow direction, and represents a boundary of the flow channel, in which case apparatuses such as grooves are also provided in the outer inner housing, in order to allow stator blades to be fitted.
  • a steam which is at a lower temperature and a lower pressure is applied to the outer inner housing, as a result of which the material of the outer inner housing may be less resistant to heat than the material of the inner inner housing.
  • the outer inner housing it is sufficient for the outer inner housing to be formed from a less high-quality material.
  • An outer housing is arranged around the inner inner housing and the outer inner housing.
  • a flow connection is provided between the inner inner housing and the outer inner housing, and makes it possible to feed a cooling medium from the flow channel into the cooling steam area.
  • This cooling steam is therefore taken from the flow channel, thus allowing the primary stresses and the secondary stresses in the inner inner housing to be kept low.
  • Primary stresses are mechanical stresses which occur as a result of external loads, for example steam pressures, weight forces etc.
  • secondary stresses which are also referred to as theimal stresses, are mechanical stresses which occur as a result of temperature fields which cannot be equalized, or changes in thermal expansions.
  • the cooling steam which is located in the cooling steam area can at the same time be used as insulation from the outer inner housing. Furthermore, a water extraction line is provided, which dissipates condensed water which occurs when stationary.
  • the steam turbine is in the form of a twin-flow steam turbine, thus allowing stresses and forces to be optimally matched to one another, for symmetry reasons.
  • FIG. 1 shows a section illustration through a twin-flow steam turbine
  • FIG. 2 shows a partial section illustration through a steam turbine, seen in the flow direction.
  • the section illustration shown in FIG. 1 through the turbomachine 1 essentially comprises an outer housing 2 , an outer inner housing 3 , which is arranged within the outer housing 2 , and an inner inner housing 4 , which is arranged within the outer inner housing 3 .
  • a rotor 5 is mounted between the outer inner housing 3 and the inner inner housing 4 such that it can rotate about a rotation axis 6 .
  • a flow channel 7 is formed between the outer inner housing 3 and the rotor 5 , as well as between the inner inner housing 4 and the rotor 5 .
  • individual rotor blades and stator blades are not illustrated in any more detail.
  • the stator blades are arranged on the inner inner housing 4 and on the outer inner housing 3 .
  • the rotor blades are arranged on the rotor 5 such that the thermal energy of fresh steam can be converted to rotation energy in the flow channel 7 .
  • Fresh steam flows via a fresh-steam inlet area, which is not illustrated in any more detail, first of all into a first flow area 8 , which is arranged between the inner inner housing 4 and the rotor 5 .
  • the inner inner housing 4 is formed from a nickel-based material.
  • the outer inner housing 3 can be formed from a material which is less resistant to high temperatures.
  • the inner inner housing 4 is faulted from a steel with a high chromium content, which comprises 9-10% by weight of chromium, wherein the outer inner housing 3 is formed from a material of less high quality than the inner inner housing 4 .
  • the steam flowing in the first flow area 8 flows along the flow channel 7 in a flow direction 9 .
  • the steam turbine 1 illustrated in FIG. 1 is a twin-flow machine, that is to say the steam flows both along a first path and along a second path in the first inlet-flow area 8 .
  • the outer inner housing 3 is adjacent to the inner inner housing 4 .
  • a second flow area 10 is formed between the outer inner housing 3 and the flow channel 7 .
  • the outer inner housing 3 comprises apparatuses, for example grooves, for holding the stator blades.
  • the inner inner housing 4 is suspended in the outer inner housing 3 in a manner which is not illustrated in any more detail.
  • the outer inner housing is formed around the inner inner housing 4 in the area of the first flow area 8 .
  • the outer inner housing 3 is in this case formed around the inner inner housing 4 , with respect to the rotation axis 6 . Outside the first flow area 8 , the outer inner housing 3 is not arranged around the inner inner housing 4 with respect to the rotation axis 6 .
  • the first flow area 8 comprises the flow channel as far as the point at which the inner inner housing 4 ends.
  • a flow connection 11 is arranged between the inner inner housing 4 and the outer inner housing 3 at the junction area between the first flow area 8 and the second flow area 10 . Steam which has been expanded from the flow channel 7 can thus flow via the flow connection 11 into a cooling steam area 12 , which is located between the inner inner housing 4 and the outer inner housing 3 .
  • the location of the flow connection 11 must therefore be appropriately chosen to ensure that a cooling medium at an appropriate temperature and an appropriate pressure flows into the cooling steam area 12 via the flow connection 11 .
  • This cooling medium which flows in the cooling steam area 12 insulates the inner inner housing 4 from the outer inner housing 3 .
  • the outer inner housing 3 essentially comprises a first outer inner housing upper part and a second lower outer inner housing part.
  • the outer inner housing 3 essentially comprises three sections, which are shaped differently. In a first section, the inner housing is therefore designed to be essentially parallel to the flow channel 9 . This first area is designed to be more or less symmetrical, both in the one path and in the other path.
  • the second central area of the outer inner housing 3 is adjacent.
  • This central area is characterized by an alignment which is first of all radial, in order to allow a cooling steam area 12 to be formed between the inner inner housing 4 and the outer inner housing 3 .
  • FIG. 2 shows an illustration of the steam turbine 1 in the flow direction.
  • the section illustrated in FIG. 2 is approximately in the center 13 of the steam turbine 1 .
  • the cooling steam which is located in the cooling steam area 12 is passed out of the cooling steam area via a cooling steam outlet line.
  • the cooling steam outlet line is formed by means of a hole in the outer inner housing 3 .
  • the cooling steam outlet line 14 is, in particular, arranged in the upper part of the outer inner housing 3 .
  • cooling steam outlet line 14 can likewise be arranged in the lower part of the outer inner housing 3 .
  • This alternative cooling steam outlet line 14 design can likewise be seen underneath the joint 15 in FIG. 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
US13/129,222 2008-11-13 2009-11-03 Inner Housing for a Turbomachine Abandoned US20110280720A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08019820A EP2187004A1 (de) 2008-11-13 2008-11-13 Innengehäuse für eine Strömungsmaschine
EP08019820.3 2008-11-13
PCT/EP2009/064492 WO2010054951A1 (de) 2008-11-13 2009-11-03 Innengehäuse für eine strömungsmaschine

Publications (1)

Publication Number Publication Date
US20110280720A1 true US20110280720A1 (en) 2011-11-17

Family

ID=40791090

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/129,222 Abandoned US20110280720A1 (en) 2008-11-13 2009-11-03 Inner Housing for a Turbomachine

Country Status (5)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120257959A1 (en) * 2009-12-15 2012-10-11 Christian Cukjati Steam turbine in a three-shelled design
US20140119886A1 (en) * 2012-10-31 2014-05-01 General Electric Company Turbine cowling system
US10677092B2 (en) 2018-10-26 2020-06-09 General Electric Company Inner casing cooling passage for double flow turbine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2644843A1 (de) * 2012-03-27 2013-10-02 Siemens Aktiengesellschaft Schraubenkühlung für eine Strömungsmaschine
EP2690253A1 (de) * 2012-07-27 2014-01-29 Siemens Aktiengesellschaft Niederdruck-Turbine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1270575B (de) * 1963-09-13 1968-06-20 Licentia Gmbh Geschweisstes Niederdruckgehaeuse fuer Dampfturbinen
US6007767A (en) * 1997-01-27 1999-12-28 Mitsubishi Heavy Industries, Ltd. High chromium heat resistant cast steel material
US20060292003A1 (en) * 2005-06-14 2006-12-28 Alstom Technology Ltd Steam turbine
US7484926B2 (en) * 2005-04-28 2009-02-03 Kabushiki Kaisha Toshiba Steam turbine power plant

Family Cites Families (12)

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CA562942A (en) * 1958-09-09 Westinghouse Electric Corporation Steam turbine apparatus
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
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
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 (de) * 2004-01-30 2005-08-03 Siemens Aktiengesellschaft Strömungsmaschine
EP1712745A1 (de) * 2005-04-14 2006-10-18 Siemens Aktiengesellschaft Komponente einer Dampfturbinenanlage, Dampfturbinenanlage, Verwendung und Herstellungsverfahren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1270575B (de) * 1963-09-13 1968-06-20 Licentia Gmbh Geschweisstes Niederdruckgehaeuse fuer Dampfturbinen
US6007767A (en) * 1997-01-27 1999-12-28 Mitsubishi Heavy Industries, Ltd. High chromium heat resistant cast steel material
US7484926B2 (en) * 2005-04-28 2009-02-03 Kabushiki Kaisha Toshiba Steam turbine power plant
US20060292003A1 (en) * 2005-06-14 2006-12-28 Alstom Technology Ltd Steam turbine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120257959A1 (en) * 2009-12-15 2012-10-11 Christian Cukjati Steam turbine in a three-shelled design
US9222370B2 (en) * 2009-12-15 2015-12-29 Siemens Aktiengesellschaft Steam turbine in a three-shelled design
US20140119886A1 (en) * 2012-10-31 2014-05-01 General Electric Company Turbine cowling system
CN103790655A (zh) * 2012-10-31 2014-05-14 通用电气公司 蒸汽轮机机罩系统
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
CN102216569A (zh) 2011-10-12
EP2344730B1 (de) 2012-12-26
JP2012508844A (ja) 2012-04-12
WO2010054951A1 (de) 2010-05-20
JP5497055B2 (ja) 2014-05-21
EP2187004A1 (de) 2010-05-19
EP2344730A1 (de) 2011-07-20

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AS Assignment

Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DALLINGER, HEINZ;MUELLER, THOMAS;ULMA, ANDREAS;SIGNING DATES FROM 20110502 TO 20110510;REEL/FRAME:026684/0490

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION