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WO2010063283A1 - Segment à buses pour turbine à vapeur - Google Patents

Segment à buses pour turbine à vapeur Download PDF

Info

Publication number
WO2010063283A1
WO2010063283A1 PCT/DE2009/050063 DE2009050063W WO2010063283A1 WO 2010063283 A1 WO2010063283 A1 WO 2010063283A1 DE 2009050063 W DE2009050063 W DE 2009050063W WO 2010063283 A1 WO2010063283 A1 WO 2010063283A1
Authority
WO
WIPO (PCT)
Prior art keywords
steam turbine
nozzle segment
sealing
nozzle
stage
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.)
Ceased
Application number
PCT/DE2009/050063
Other languages
German (de)
English (en)
Inventor
Hartmut Klemm
Jörg GATZKE
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.)
Everllence SE
Original Assignee
MAN Turbo 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 MAN Turbo AG filed Critical MAN Turbo AG
Priority to DE112009003212T priority Critical patent/DE112009003212A5/de
Publication of WO2010063283A1 publication Critical patent/WO2010063283A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
    • F01D9/044—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators permanently, e.g. by welding, brazing, casting or the like
    • 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
    • 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
    • F01D25/246—Fastening of diaphragms or stator-rings
    • 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

Definitions

  • Nozzle Segment for a Steam Turbine The invention relates to a nozzle segment for a stage, in particular a recycling stage, a steam turbine, mtt at least one vane and a Befes ⁇ - supply section for fixing the DQsensegment ⁇ , and a steam turbine with a nozzle ring mtt such D ⁇ sens ⁇ gmenten.
  • the mass flow rate can be varied by individual nozzles of a stage to affect the performance of the turbine.
  • the nozzles can, for example, be adjusted by adjusting ⁇ 3 m of their defining heights.
  • the control stage is the first stage of a steam turbine; its stepped wheel is called the control wheel
  • Dw nozzle ring is here separately composed of individual nozzle segments, which are axially spaced from the Dftchtungsftftch ⁇ between réellegehause and Jardinnrad.
  • the object of the present invention is to improve a seal on the outer circumference of a stepped wheel of a steam turbine.
  • a nozzle segment according to the preamble of claim 1 is further developed by the characterizing Merkmaie claim 7 provides a steam turbine with a nozzle ring with soteh ⁇ n DO ⁇ ensegmenten under protection, the ünter bulke relate to advantageous developments.
  • nozzle segments or a stage of a steam turbine, each having a ⁇ fixing section for attachment to, for example, an inner housing, in particular a stator of the steam turbine, integral with a sealing section for sealing a step wheel of the steam turbine on its outer circumference.
  • the sealing section can be fastened to the steam turbine together with the nozzle segment.
  • a suitable sealing surface can be formed on the inner housing, which faces the outer circumference of the stepped wheel and cooperates sealingly with it on a simple assembly-wise manner
  • the sealing section on the single nozzle segment can often be made or machined more easily than in situ in the steam turbine.
  • Another advantage may be that the axial distance between the nozzle segment or Hing and the sealing surface can be shortened, so that the a- xiale space for receiving the nozzle ring and sealing surface shortens and / or less dead zones in the steam flow to the step wheel arise.
  • Vorteefttaft also increases Gestaitungsspielraum in the construction of the inner Gehiuses.
  • it is preferably possible to dispense with a Schwanerihai-shaped deposition in the lacquer application layer.
  • a nozzle segment according to an embodiment of the present invention with an integrated othaling section even the smallest blades can be represented.
  • the underlying invention can be implemented in DQ segments and in the regeneration stage.
  • Their stepper or reirradial is subjected to strongly alternating changes, particularly in the case of variations in the steam flow, so that the seal is subjected to increased loads on the outer circumference, which are better absorbed by a sealing section formed integrally with a nozzle segment.
  • the formation of the sealing section on the DQ ⁇ segment can enable a compensation of heat-related changes in the quality of the inner housing.
  • the integral formation of the construction section with the nozzle segment can be realized, in particular, by means of a single-layer design of the nozzle segment with fastening seal section and one or more laminate projects.
  • a nozzle segment can be formed in the form of a urine, for example cast or forged, and / or machined, for example milled, ground or eroded.
  • the decay step is advantageously made of the usually high-quality, in particular high-strength, hard and / or temperature-resistant material of the actual nozzle segment, thus additionally protecting the inner housing.
  • the sealing portion can also be detachable, for example by screws, or inextricably, for example by welding. Caulking. Rivets or the like, with the remaining nozzle segment in particular the attachment portion, a LetechaufeKu ⁇ and / or a Lattsc ⁇ a ⁇ fekJeckel be connected.
  • the sealing section In the axial direction of the steam turbine, the sealing section preferably fully or partially engages over the outer circumference of the stepped wheel if the nozzle segment and the stepped wheel are fastened in the steam turbine in order to make sealing material available at the outer circumference.
  • the inner housing can advantageously be protected against wear or damage by a grazing outer circumference of the stepped wheel, but also against mechanical and thermal stresses by the steam.
  • the sealing portion can be easily replaced together with the rest of Dösensegment.
  • one or more, in particular axially spaced-apart, seal binder are arranged on the Dteht ⁇ ngsabites soft stand extend in the radial direction to the Auß ⁇ nuse the stage wheel out.
  • One or more sealing bands can be detachably or permanently attached to the sealing portion, for example, be caulked with this.
  • one or more sealing bands may also be in one piece with the sealing portion, for example as radial shoulders.
  • a combination of such single-storey, radial Absetze and fortified Dfchtungs- bander is possible.
  • a nozzle segment in which the guide blade, fastening element and sealing section are constructed in one piece and to which additional elements, for example separate sealing strips are fastened is referred to as one-piece in the sense of the present invention
  • a nozzle ring of one or more stages comprises one or more nozzle segments explained above.
  • a nozzle ring may consist entirely of dome segments according to the invention, in which case preferably their connecting portions form a substantially closed sealing ring above the outer circumference of the corresponding stepped gear.
  • adjacent sealing sections may be adapted to their have mutually facing memorissstirnmaschine complementary structures, for example, projections or recesses in the circumferential direction, have
  • the nozzle section of a first nozzle segment may have a greater extent in the circumferential direction, that of an adjacent second nozzle segment a smaller overall to give the desired overall circumference.
  • Fig. 1A, 1B in each case a control stage of a steam turbine according to the prior art in longitudinal section;
  • FIG. 2B a nozzle segment according to an embodiment of the present invention in perspective view
  • FIG. 1A shows a longitudinal section of a control stage of a steam turbine according to the prior art with a nozzle segment 10, which is fastened in a separate swinging hanger-shaped Lertschaufettrager or Düsenk ⁇ sten 3OA, which is part of a mecanicgehiuses 3OC the steam turbine are as irme ⁇ gehause so far those Parts of the steam turbine that carry the steam to or in the loading section.
  • a reirradial 20 of a rotor 100 of the steam turbine which has radial protrusions on its outer circumference (at the top in FIG.
  • FIG. 1B shows a corresponding illustration of a control stage of a further steam turbine according to the prior art.
  • the same components are designated by the same reference numerals, so reference is made to the above explanations.
  • the design of the tnnengehauses which is here formed with an integrated L ⁇ rtscnaufe ⁇ rä ⁇ er to which the nozzle segments 10 are fixed, which requires adversely an unnecessary radial blade height of the Leitschaufein the nozzle segments 10 and the La ⁇ fschaufein the control wheel 20th
  • the nozzle segment 1 for example, on a separate Leitschrag ⁇ rrag ⁇ r 30A, as shown in Rg. 1 A or an integrated into the inner housing Leitschaufeltrager, as shown in Fig. 1B, for example, be introduced into a restrictivetnut (not shown) ,
  • a plurality of guide vanes 1.2 are formed. Two adjacent vanes each define a nozzle for bypassing * A flow of steam on runners 2.1, 2.2,... 2.5 of a subsequent control wheel 2.
  • the nozzle segment 1 extends in circumferential direction over a plurality of nozzles and accordingly has a plurality of oil pockets 1.2.
  • each dssensegm ⁇ nt can ask only one leHschaufol.
  • the fixing portion 1.1 is a 1.3 Oichtungsabrough formed. This has in Urnfarigscardi the same width as the mounting portion 1.1, and extends in the axial direction (from left to right in Fig. 2) on the outer periphery of the control wheel 2, by interconnected cover plates 2A adjacent UH ⁇ schaufeln 2.1, 2.2, .. .2.5 of the control wheel 2 is formed
  • the cover plates 2A have radial shoulders in the axial direction.
  • the abutting circumferential faces of the sealing portions of the adjacent nozzle are substantially vapor-tight with each other, so that the sealing portions 1.3 together form a closed sealing ring.
  • the sealing portions 1.3 may have a slight excess in the circumferential direction, so that they are braced against each other in the assembled state in order to increase the tightness of the sealing ring.
  • the sealing strips 1.4 may have the same width as the sealing section 1.3 in the beginning, and thus be joined, for example welded or squashed, prior to the attachment of the nozzle segment 1 to the inner housing, or integrally, for example as pre-formed or subsequently inserted radial shoulders be made together with the sealing section 1.3. Gl ⁇ ichermaöen, however, it is also possible first to attach several, especially all nozzle segments with the integrated seal sections on the inner housing and only then introduce annular sealing bands in circumferential grooves in the sealing ring.

Landscapes

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

Abstract

Un segment à buses (1) pour un étage, en particulier un étage de régulation d'une turbine à vapeur, comportant au moins une aube directrice (1,2) et une partie de fixation (1,1) pour fixer le segment à buses, présente une section d'étanchéité (1.3) pour l'étanchéification d'un pignon étagé (2) de la turbine à vapeur sur son périmètre extérieur, qui est formé intégralement avec le segment à buses (1).
PCT/DE2009/050063 2008-12-05 2009-11-20 Segment à buses pour turbine à vapeur Ceased WO2010063283A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112009003212T DE112009003212A5 (de) 2008-12-05 2009-11-20 Düsensegment für eine dampfturbine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810060706 DE102008060706A1 (de) 2008-12-05 2008-12-05 Düsensegment für eine Dampfturbine
DE102008060706.1 2008-12-05

Publications (1)

Publication Number Publication Date
WO2010063283A1 true WO2010063283A1 (fr) 2010-06-10

Family

ID=41683037

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2009/050063 Ceased WO2010063283A1 (fr) 2008-12-05 2009-11-20 Segment à buses pour turbine à vapeur

Country Status (2)

Country Link
DE (2) DE102008060706A1 (fr)
WO (1) WO2010063283A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1004202B (de) 1954-01-27 1957-03-14 Siemens Ag Hoechstdruck-Hoechsttemperaturturbine mit eingesetztem Innengehaeuse
EP0551229A1 (fr) * 1992-01-08 1993-07-14 Gec Alsthom Sa Rotor tambour pour turbine à vapeur à action avec montage des ailettes dans des rainures longitudinales
DE3413628C2 (de) 1983-04-25 1996-09-19 Gen Electric Spaltdichtung für eine Dampfturbine
EP1092840A1 (fr) * 1998-06-01 2001-04-18 Mitsubishi Heavy Industries, Ltd. Distributeur assemblé pour turbine à vapeur
EP1408198A1 (fr) * 2001-07-19 2004-04-14 Toshiba Carrier Corporation Membrane de buse de type a assembler et procede d'assemblage
DE102004026503A1 (de) 2003-05-29 2004-12-16 General Electric Co. Düsenzwischenstufendichtung für Dampfturbinen
EP1793092A1 (fr) * 2004-06-30 2007-06-06 Kabushiki Kaisha Toshiba Dispositif porte-injecteur sur turbine et turbine à vapeur

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1239889B (de) * 1963-06-28 1967-05-03 Licentia Gmbh Eintrittsleitschaufelkranz fuer Axialturbinen, insbesondere Axialgasturbinen, mit radial federnd angedrueckten Ringsegmenten
DE1286810B (de) * 1963-11-19 1969-01-09 Licentia Gmbh Laufschaufelradialspalt-Abdeckring einer Axialturbomaschine, insbesondere -gasturbine
DE2413655C3 (de) * 1974-03-21 1978-05-03 Maschinenfabrik Augsburg-Nuernberg Ag, 8500 Nuernberg Einrichtung zum dynamischen Stabilisieren des Läufers einer Gas- oder Dampfturbine
JPS6435001A (en) * 1987-07-30 1989-02-06 Toshiba Corp Gap adjusting device for seal part of turbine
US5049033A (en) * 1990-02-20 1991-09-17 General Electric Company Blade tip clearance control apparatus using cam-actuated shroud segment positioning mechanism
DE102004016222A1 (de) * 2004-03-26 2005-10-06 Rolls-Royce Deutschland Ltd & Co Kg Anordnung zur selbsttätigen Laufspalteinstellung bei einer zwei- oder mehrstufigen Turbine
US7287956B2 (en) * 2004-12-22 2007-10-30 General Electric Company Removable abradable seal carriers for sealing between rotary and stationary turbine components
DE102007018063B4 (de) * 2007-04-17 2012-02-09 Siemens Ag Gleichdruckturbine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1004202B (de) 1954-01-27 1957-03-14 Siemens Ag Hoechstdruck-Hoechsttemperaturturbine mit eingesetztem Innengehaeuse
DE3413628C2 (de) 1983-04-25 1996-09-19 Gen Electric Spaltdichtung für eine Dampfturbine
EP0551229A1 (fr) * 1992-01-08 1993-07-14 Gec Alsthom Sa Rotor tambour pour turbine à vapeur à action avec montage des ailettes dans des rainures longitudinales
EP1092840A1 (fr) * 1998-06-01 2001-04-18 Mitsubishi Heavy Industries, Ltd. Distributeur assemblé pour turbine à vapeur
EP1408198A1 (fr) * 2001-07-19 2004-04-14 Toshiba Carrier Corporation Membrane de buse de type a assembler et procede d'assemblage
DE102004026503A1 (de) 2003-05-29 2004-12-16 General Electric Co. Düsenzwischenstufendichtung für Dampfturbinen
EP1793092A1 (fr) * 2004-06-30 2007-06-06 Kabushiki Kaisha Toshiba Dispositif porte-injecteur sur turbine et turbine à vapeur

Also Published As

Publication number Publication date
DE112009003212A5 (de) 2012-07-05
DE102008060706A1 (de) 2010-06-10

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