EP2863019B1 - Dichtungsanordnung - Google Patents

Dichtungsanordnung Download PDF

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Publication number
EP2863019B1
EP2863019B1 EP13189280.4A EP13189280A EP2863019B1 EP 2863019 B1 EP2863019 B1 EP 2863019B1 EP 13189280 A EP13189280 A EP 13189280A EP 2863019 B1 EP2863019 B1 EP 2863019B1
Authority
EP
European Patent Office
Prior art keywords
turbine
annular
ring
seal arrangement
circumferential surface
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.)
Active
Application number
EP13189280.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2863019A1 (de
Inventor
Ralf Dr. Bell
Isabell Böer
Giuseppe Gaio
Raimund Heinze
Markus Legenbauer
Damian Razowski
Thomas Riedel
Stanislaw Ruda
Ralf Ziwes
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
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Priority to EP13189280.4A priority Critical patent/EP2863019B1/de
Priority to IN2686DE2014 priority patent/IN2014DE02686A/en
Priority to US14/514,871 priority patent/US10125626B2/en
Priority to JP2014212408A priority patent/JP2015108372A/ja
Priority to CN201410558534.6A priority patent/CN104564171B/zh
Publication of EP2863019A1 publication Critical patent/EP2863019A1/de
Application granted granted Critical
Publication of EP2863019B1 publication Critical patent/EP2863019B1/de
Active 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/005—Sealing means between non relatively rotating elements
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/80—Repairing, retrofitting or upgrading methods
    • 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
    • F05D2240/55—Seals
    • F05D2240/57—Leaf seals

Definitions

  • the present invention relates to a sealing arrangement for sealing an annular gap present between a high-pressure steam space and an adjacently arranged low-pressure steam space, which is defined between two turbine housings divided into two housing halves, wherein the sealing arrangement has a segmented and annularly formed sealing element which, in the intended condition, is located between the two extends two turbine housings and engages with at least one of its radial end portions in an annular receiving groove.
  • the present invention relates to the use of such a sealing arrangement for sealing an existing between a high-pressure steam space and an adjacent low-pressure steam chamber of a turbine annular gap, a turbine with at least two each divided into two housing halves turbine housings between them form a high pressure steam space and a low pressure steam space, said Steam chambers are separated by an annular gap defined between the turbine housings, and a method for repairing a worn seal assembly of the aforementioned type.
  • annular sealing elements are used for sealing existing between two adjacent vapor chambers existing annular gaps, which are defined between two each divided into two housing halves turbine housings.
  • the sealing elements usually have an I-shaped cross-section and are divided into two segments in order to assemble them.
  • the opposing radial end portions of the annular sealing elements engage in annular grooves, which are formed opposite each other on the turbine housings or on their respective housing halves.
  • EP2351910 (D1 ) discloses such a sealing arrangement for sealing an annular gap present between a high-pressure steam space and an adjacently arranged low-pressure steam space.
  • the sealing elements and in particular the annular grooves are subject to wear during turbine operation by steam erosion and by mechanical loads.
  • the present invention provides a seal assembly of the type mentioned above, which is characterized in that the seal assembly has at least one segmented ring, the first peripheral surface fixed in the intended condition on one of the turbine housing detachably in the region of the annular gap and its opposite second peripheral surface is provided either with the annular receiving groove or in one-piece construction with the radially projecting annular sealing element.
  • the main advantage of the sealing arrangement according to the invention is that in a major overhaul, for example after 100,000 operating hours, not only the sealing element but also the at least one segmented ring can be completely replaced. Accordingly, an inspection, an inspection of the wear as well as complex repair work can be dispensed with. In addition, a targeted, predictable and cost-effective replacement solution is also possible for the second revision interval, which is beneficial to the planning reliability with respect to the effort to be operated and also the downtime.
  • the sealing arrangement comprises a first ring whose first peripheral surface is fastened in the intended state to one of the turbine housing detachably in the region of the annular gap and its opposite second peripheral surface is provided with the annular receiving groove, and a second ring whose first peripheral surface fixed in the intended condition on the other turbine housing releasably secured in the region of the annular gap relative to the first ring and its opposite second peripheral surface is provided with an annular receiving groove, wherein the sealing element is formed as a separate component and engages in the intended condition in the annular grooves of both rings.
  • the seal assembly in this variant comprises a three-part structure with two segmented rings, which serve on the one hand for attachment to the turbine housings and on the other define the annular grooves, and a trained as a separate component sealing element which engages in the intended condition in the two grooves ,
  • the sealing arrangement comprises a first ring whose first peripheral surface is fastened in the intended state to one of the turbine housing detachably in the region of the annular gap and its opposite second peripheral surface is provided with an annular receiving groove, and a second ring whose first peripheral surface fixed in the intended state to the other turbine housing releasably secured in the region of the annular gap relative to the first ring and the opposite second peripheral surface is formed with the radially projecting annular sealing element, wherein the integrally formed with the second ring sealing element in the intended condition in the annular receiving groove of the first ring attacks.
  • the seal assembly thus comprises only two components each formed segmented, namely a first ring with one piece trained and radially projecting sealing element and a second ring which defines the annular receiving groove into which the sealing element engages in the intended condition.
  • the ring or rings are made of steel.
  • the sealing element in the region of its free end on a rounded and widened trained end portion which engages in the intended state in the associated annular receiving groove. Thanks to the rounding a good fit of the sealing element is ensured in the associated annular receiving groove. If the sealing element is a separate component, correspondingly formed end sections can, of course, be provided at both free ends of the sealing element.
  • the end portion is formed in cross-section substantially oval. Particularly good results were achieved with this mold.
  • the present invention further relates to the use of a sealing arrangement according to the invention for sealing an existing between a high-pressure steam space and an adjacent low pressure steam space of a turbine annular gap which is defined between two each divided into two housing halves turbine housings of the turbine.
  • the present invention provides for solving the object mentioned a turbine with at least two divided into two housing halves turbine housings, which form a high-pressure steam space and a low-pressure steam space between them, wherein the steam chambers are separated by an annular gap defined between the turbine housings, by a seal assembly according to the invention is sealed.
  • the turbine according to one embodiment of the present invention is a low-pressure turbine.
  • the present invention provides a method for repairing a worn seal assembly of a turbine according to the invention in which the worn seal assembly is completely replaced by a new seal assembly, in particular as part of a major overhaul of the turbine.
  • FIG. 1 shows a turbine 1, which is a low-pressure steam turbine.
  • the turbine 1 comprises a rotor 3 provided with blades 2, which is mounted at its free ends by means of corresponding bearings 4 and 5.
  • steam flows in the direction of the arrow 6 into an inlet 7 in the blading of the rotor 3 and exits through an outlet 8 from this again.
  • the turbine 1 is surrounded by an outer housing 9.
  • an outer inner housing 10 and an inner inner housing 11 are provided, which are each divided into two housing halves, in this case each in an upper housing half and in a lower housing half.
  • the inner housings 10 and 11 define between them a high-pressure steam space 12 and a low-pressure steam space 13 which are separated from one another by an annular gap 14 remaining between the outer inner housing 10 and the inner inner housing 11.
  • This annular gap 14 is sealed by a sealing arrangement according to the invention, as described below with reference to FIGS FIGS. 2 to 5 is explained in more detail.
  • FIG. 2 shows a first variant of a seal assembly 15 according to the present invention.
  • the sealing arrangement 15 comprises a segmented first ring 16, the outer peripheral surface 17 of which is detachably fastened to the outer inner housing 10 in the region of the annular gap 14 and whose opposite inner peripheral surface 18 is provided with an annular receiving groove 19.
  • the sealing arrangement 15 comprises a segmented second ring 20, whose inner peripheral surface 21 releasably secured to the inner inner housing 11 in the region of the annular gap 14 relative to the first ring 16 and the opposite outer peripheral surface 22 is provided with an annular receiving groove 23, wherein the receiving grooves 19 and 23 of the rings 16 and 20 radially are arranged opposite each other.
  • the sealing arrangement 15 comprises an annular segmented sealing element 24 which is formed as a separate component.
  • the sealing element 24 has an essentially I-shaped cross section, wherein it is provided at its two free ends with rounded and widened end portions 25 which have a substantially oval cross section. With these end portions 25, the sealing element 24 engages in the formed on the rings 16 and 20 receiving grooves 19 and 23rd
  • FIG. 3 shows a further variant of a sealing arrangement according to the invention 26.
  • the seal assembly 26 comprises a segmented first ring made of metal 27.
  • the outer peripheral surface 28 of the first ring 27 is detachably secured to the outer inner housing 10 in the region of the annular gap 14, and the opposite inner peripheral surface 29 of the first Ring 27 is provided with an annular receiving groove 30.
  • the seal assembly 26 includes a segmented second ring 31, which is also made of metal.
  • the inner circumferential surface 32 of the second ring 31 is detachably secured to the inner inner housing 11 opposite to the first ring 27, and the opposite outer peripheral surface 33 of the second ring 31 is provided with an annular receiving groove 34, the receiving grooves 30 and 34 of the rings 27 and 31 radially are arranged opposite each other.
  • the rings 27 and 31 are respectively received in annular recesses 35 and 36 of the inner housing 10 and 11, so that formed by the recesses 35 and 36, each radially projecting projections 37 and 38 of the inner housing 10 and 11 axial stops for the rings 27 and 31 form. In this way a better grip of the rings 27 and 31 on the inner housings 10 and 11 is ensured.
  • the rings 27 and 31 each comprise a support bar 39, 40 and a sealing strip 41, 42 projecting as annular shoulders axially in the direction of the projections 37 and 38 and are radially spaced from each other, wherein the sealing strips 41, 42 protrude slightly further than the associated support strips 39, 40.
  • the fixation of the rings 27 and 31 in the corresponding recesses 35, 36 can be done for example by means of fastening screws which are distributed along the circumference of the rings 27, 31 and in the axial direction between the respective support bar 39, 40 and sealing strip 41, 42 extend through the rings 27, 31 and in corresponding threaded holes (not shown) of the projections 37, 38 are screwed.
  • the sealing arrangement 26 according to the second variant also has a sealing element, the structure of which essentially corresponds to the sealing element of FIG. 2 corresponds to the first variant shown, which is why it is also designated by the reference numeral 24 and will not be described again.
  • the sealing element 24 engages with its end portions 25 in the receiving grooves 30 and 34 of the rings 27 and 31st
  • FIG. 4 shows a seal assembly 43 according to a third variant of the present invention.
  • the seal assembly 43 includes a segmented ring 44, the inner peripheral surface 45 of which is detachably secured to the inner inner housing 11 in the region of the annular gap 14, and from the opposite outer peripheral surface 46 an annular sealing member 47 projects radially, which is formed integrally with the ring 44.
  • the sealing element 47 has, in the region of its free end, a rounded and widened end section 48, which has a substantially oval cross-section.
  • the sealing arrangement 43 comprises a receiving groove 49, in which the end portion 48 of the sealing element 47 engages, wherein the receiving groove 49 is introduced in this variant in the outer inner housing 10.
  • FIG. 5 shows a seal assembly 50 according to a fourth variant of the present invention.
  • the sealing arrangement 50 comprises a segmented first ring 51, the outer circumferential surface 52 of which is fastened detachably to the outer inner housing 10 in the region of the annular gap 14 and whose opposite inner circumferential surface 53 is provided with an annular receiving groove 54.
  • the seal assembly 50 has a segmented second ring 55, the inner peripheral surface 56 is releasably secured to the inner inner housing 11 and protrudes from the outer peripheral surface 57 a radially projecting annular seal member 58 which is integrally formed with the second ring 55.
  • the sealing element 58 has a rounded and widened end portion 59 with an oval cross-section, which engages in the receiving groove 54 of the first ring 51.
  • All rings and sealing elements of the four variants described above are preferably divided in the middle into two segments and made of steel.
  • the releasable attachment of the respective rings to the associated inner housings can be done using press fits, mounting screws or the like. Even if the FIGS. 2 to 5 only on the in FIG. 1 It should be clear that also further annular gaps of the turbine 1 can be sealed with corresponding sealing arrangements according to the invention.
  • An essential advantage associated with the seal assemblies 15, 26, 43 and 50 according to the invention is that their individual components can be partially or completely replaced by new components as part of a revision depending on the chosen variant, whereby inspection, inspection and Repair of the seal assemblies completely or completely omitted. In this way costs can be reduced. In addition, the replacement of components compared to their testing and repair of planning reliability in terms of effort and downtime benefits.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Gasket Seals (AREA)
  • Sealing Devices (AREA)
EP13189280.4A 2013-10-18 2013-10-18 Dichtungsanordnung Active EP2863019B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP13189280.4A EP2863019B1 (de) 2013-10-18 2013-10-18 Dichtungsanordnung
IN2686DE2014 IN2014DE02686A (enrdf_load_stackoverflow) 2013-10-18 2014-09-18
US14/514,871 US10125626B2 (en) 2013-10-18 2014-10-15 Seal arrangement
JP2014212408A JP2015108372A (ja) 2013-10-18 2014-10-17 シール構造体
CN201410558534.6A CN104564171B (zh) 2013-10-18 2014-10-20 密封装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13189280.4A EP2863019B1 (de) 2013-10-18 2013-10-18 Dichtungsanordnung

Publications (2)

Publication Number Publication Date
EP2863019A1 EP2863019A1 (de) 2015-04-22
EP2863019B1 true EP2863019B1 (de) 2017-03-29

Family

ID=49385152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13189280.4A Active EP2863019B1 (de) 2013-10-18 2013-10-18 Dichtungsanordnung

Country Status (5)

Country Link
US (1) US10125626B2 (enrdf_load_stackoverflow)
EP (1) EP2863019B1 (enrdf_load_stackoverflow)
JP (1) JP2015108372A (enrdf_load_stackoverflow)
CN (1) CN104564171B (enrdf_load_stackoverflow)
IN (1) IN2014DE02686A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113550830B (zh) * 2021-08-26 2022-11-25 中国联合重型燃气轮机技术有限公司 密封装置及具有它的燃气轮机
CN115234379B (zh) * 2022-08-05 2025-08-01 中国联合重型燃气轮机技术有限公司 燃气轮机及其密封组件

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1038162A (fr) * 1951-06-06 1953-09-25 Licentia Gmbh Turbine à vapeur ou à gaz à admission axiale comportant un support inséré pour les aubes directrices ou couvercle à tuyères
US5104286A (en) * 1991-02-08 1992-04-14 Westinghouse Electric Corp. Recirculation seal for a gas turbine exhaust diffuser
US6648332B1 (en) * 2002-07-29 2003-11-18 General Electric Company Steam turbine packing casing horizontal joint seals and methods of forming the seals
US7001145B2 (en) 2003-11-20 2006-02-21 General Electric Company Seal assembly for turbine, bucket/turbine including same, method for sealing interface between rotating and stationary components of a turbine
EP2239419A1 (de) 2009-03-31 2010-10-13 Siemens Aktiengesellschaft Axialturbomaschinenrotor mit Dichtscheibe
US20110164965A1 (en) * 2010-01-06 2011-07-07 General Electric Company Steam turbine stationary component seal
EP2410128A1 (de) * 2010-07-21 2012-01-25 Siemens Aktiengesellschaft Interne Kühlung für eine Strömungsmaschine
US9017015B2 (en) * 2011-10-27 2015-04-28 General Electric Company Turbomachine including an inner-to-outer turbine casing seal assembly and method
US20130181408A1 (en) 2012-01-13 2013-07-18 General Electric Company Brush seal arrangement combined with honeycomb seal
JP6125329B2 (ja) * 2013-05-27 2017-05-10 株式会社東芝 静止部シール構造

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN104564171B (zh) 2018-11-13
EP2863019A1 (de) 2015-04-22
CN104564171A (zh) 2015-04-29
US20150110620A1 (en) 2015-04-23
JP2015108372A (ja) 2015-06-11
US10125626B2 (en) 2018-11-13
IN2014DE02686A (enrdf_load_stackoverflow) 2015-06-26

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