WO2010021566A1 - Joint labyrinthe pour une turbine à vapeur - Google Patents

Joint labyrinthe pour une turbine à vapeur Download PDF

Info

Publication number
WO2010021566A1
WO2010021566A1 PCT/RU2009/000130 RU2009000130W WO2010021566A1 WO 2010021566 A1 WO2010021566 A1 WO 2010021566A1 RU 2009000130 W RU2009000130 W RU 2009000130W WO 2010021566 A1 WO2010021566 A1 WO 2010021566A1
Authority
WO
WIPO (PCT)
Prior art keywords
turbine
honeycomb
stator
blocks
housing
Prior art date
Application number
PCT/RU2009/000130
Other languages
English (en)
Russian (ru)
Inventor
Александр Степанович ЛИСЯНСКИЙ
Александр Фёдорович ИВАХ
Михаил Павеласович ЮШКА
Сергей Владимирович УШИНИН
Константин Витальевич ГОРЛИЦЫН
Original Assignee
Lisyanskiy Aleksandr Stepanovi
Ivah Aleksandr Fedorovich
Yushka Mihail Pavelasovich
Ushinin Sergei Vladimirovich
Gorlicin Konstantin Vitalievic
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 Lisyanskiy Aleksandr Stepanovi, Ivah Aleksandr Fedorovich, Yushka Mihail Pavelasovich, Ushinin Sergei Vladimirovich, Gorlicin Konstantin Vitalievic filed Critical Lisyanskiy Aleksandr Stepanovi
Publication of WO2010021566A1 publication Critical patent/WO2010021566A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings
    • F16J15/4472—Labyrinth packings with axial path
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/444—Free-space packings with facing materials having honeycomb-like structure
    • 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
    • F05D2250/00—Geometry
    • F05D2250/70—Shape

Definitions

  • the invention relates to a sealing technique.
  • housings of cellular blocks are segments that are cut from an annular blank (a rolled ring); made of highly alloyed stainless steel, for example, steel 12X11H2B2MF-Sh.
  • This steel has high hardness and strength, therefore, in order to carry out the installation of cases of honeycomb blocks, it is necessary to produce a housing for each stage of the turbine.
  • the cases have L-shaped or T-shaped locks for their fixation on the stator turbines.
  • the workpiece in the form of a rolled ring of highly alloyed stainless steel has a large cross-sectional area and, therefore, a large mass and cost.
  • the labyrinth seal of the aforementioned patent has a housing of honeycomb blocks with a T-shaped lock, annular sealing ridges of the stator and with two paths of the honeycomb blocks. Housings of cellular blocks are segments that are cut from an annular blank (a rolled ring) made of highly alloyed stainless steel.
  • the housing segments are inserted into the stator groove having a T-shape in the longitudinal section of the turbine. From circumferential movements, the segments of the housings are fixed with radial pins. In the axial direction, the housing segments are held by the lateral surface of the T-slot of the turbine stator.
  • This design of the seal leads to a large cross-section of the holder (the final size of the body of the holder in the radial direction is not less than 22 mm).
  • a rolling ring is made with a certain diameter. This leads to the high cost of housing blanks in the form of rolled rings from high alloy corrosion-resistant steel and, therefore, the high cost of manufacturing a set of labyrinth seals for the entire turbine.
  • the invention solves the problem of reducing the cost of manufacturing seals and improve maintainability.
  • the labyrinth over-seal for a steam turbine contains o-ring combs mounted on a turbine rotor.
  • Sealing segments include small cell honeycomb blocks that are soldered to the housing of the honeycomb blocks between the sealing ridges, made integrally with the housing of the honeycomb blocks.
  • annular grooves are made having a V-shape in the longitudinal section of the turbine.
  • the seal segments are made separately for each row of turbine rotor combs.
  • the cases of the honeycomb blocks are made of plastic alloy steel and are V-shaped in cross section with dimensions allowing insertion of the cases of the honeycomb blocks into the groove of the turbine stator with a minimum clearance.
  • the housings of the cell blocks Prior to installation, are flat in longitudinal section.
  • the housings When mounting the honeycomb housings by pushing the honeycomb housings from the side of the horizontal stator connector along the V-groove of the turbine stator, the housings become curved into longitudinal section shape. With this installation, the difference between the radii of curvature of the groove of the stator of the turbine and the housings of the cellular blocks is obtained. In this case, the cases of the cellular blocks due to the elasticity of the material of the cases are fixed in the radial direction.
  • the labyrinth over-seal for a steam turbine comprises a turbine stator 1 with annular grooves 2 having a V-shape in the longitudinal section of the turbine.
  • the segments of the honeycomb seal 3 are inserted into the V-shaped annular groove 2 of the turbine stator, each of which includes a honeycomb housing 4 made of alloyed corrosion-resistant plastic steel and honeycomb 5 soldered to the housings 4 using a soldered seam 6.
  • Housing of honeycomb blocks 4 has a V-shape in cross section and a small cross-sectional area. Set of small transverse area sections and manufacturing of plastic steel allows you to deform segments 3 in the cold state.
  • the housing 4 has sealing ridges 7 made integral with the housing 4.
  • the sealing ring combs 8 of the turbine rotor 9 are made integral with the bandage of the working blades 10. Opposite each comb 8 there is a corresponding annular groove 2.
  • the sealing segments 3 have a flat section in longitudinal section before installation shape (figure 2). For installation, the sealing segment 3 is inserted into the groove 2 from the side of the longitudinal horizontal connector 11 of the turbine stator. Between the housing 4 and the groove 2 there is a minimum clearance 12, which allows mechanical movement of the housing 4 along the arrow B (FIG. 3) to move the housing 4 along the groove 2. During such a cold plastic deformation, the radius of curvature of the housing 4 is greater than the radius of curvature of the groove by the size of the "selected" gap 12. In this case, the buildings 4 of the honeycomb blocks due to the elasticity of the material of the buildings are fixed in the radial direction.
  • the work of the labyrinth over-seal is that when the rotor of the turbine 9 rotates, the scallops 8, which seal the gap along which the “parasitic” steam flows, can touch the fine-mesh cellular blocks 5 without accident consequences and reduce the efficiency of the seal.
  • the honeycomb blocks are made of thin metal foil.
  • the advantage of the proposed design of the labyrinth over-seal is that the mass of the workpiece of the housing of honeycomb blocks with a V-shaped cross-section has a small cross-sectional area due to the absence of the need to make a T-shaped or L-shaped lock on the housing. This leads to a decrease in the mass of the workpiece for the housing of the cellular blocks and, consequently, to a decrease in the manufacturing price of the labyrinth over-seal seal.
  • one standard size for all stages of a steam turbine leads to: a) a reduction in the cost of manufacturing a set of seals for the entire turbine due to the unification of measuring and cutting tools; b) to reduce the cost and reduce the range of spare parts.
  • a reduction in the cost of manufacturing a set of seals for the entire turbine due to the unification of measuring and cutting tools leads to: a) a reduction in the cost of manufacturing a set of seals for the entire turbine due to the unification of measuring and cutting tools; b) to reduce the cost and reduce the range of spare parts.
  • one track of the cell blocks is damaged, only one row of seal segments is subject to replacement. This reduces the cost of repair, compared with the repair of segments on which two rows of cellular blocks are made.

Landscapes

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

Abstract

L’invention concerne des techniques d’étanchéité. Selon l' invention, le joint labyrinthe pour une turbine à vapeur comprend des nervures d'étanchéité annulaires du rotor de turbine, des segments d'étanchéité constitués de blocs de nid d'abeilles à cellules fines, soudés sur les corps de blocs en nid d'abeilles entre les nervures d'étanchéité du stator, ces dernières étant fabriquées d’un seul tenant avec les corps de blocs en nid d'abeilles, des rainures annulaires du stator de turbine possédant une forme en V en coupe longitudinale de la turbine, et un joint longitudinal horizontal. Les segments d'étanchéité sont réalisés séparément pour chaque rangée de nervures du rotor de turbine. Le corps de blocs en nid d'abeilles sont constituées d’un alliage ductile en acier et présentent une coupe transversale en V. Les dimensions permettent d’insérer le corps de blocs en nid d'abeilles dans la rainure en forme de V du stator de turbine avec un intervalle minimal. Avant le montage, les corps de blocs en nid d'abeilles sont de forme plate en coupe longitudinale, et ladite forme devient incurvée en coupe longitudinale lors du montage de celle-ci lorsque les corps des blocs en nid d'abeilles sont poussés à partir du joint horizontal le long de la rainure en forme de V du stator de turbine. Grâce à la différence entre le rayon de courbure de la rainure du stator de turbine et les corps des blocs en nid d'abeilles, ledit corps des blocs en nid d'abeilles sont fixés dans une direction radiale grâce à l’élasticité du matériau du corps.
PCT/RU2009/000130 2008-08-06 2009-03-17 Joint labyrinthe pour une turbine à vapeur WO2010021566A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2008132289/06A RU2362887C1 (ru) 2008-08-06 2008-08-06 Лабиринтное надбандажное уплотнение для паровой турбины
RU2008132289 2008-08-06

Publications (1)

Publication Number Publication Date
WO2010021566A1 true WO2010021566A1 (fr) 2010-02-25

Family

ID=41048477

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2009/000130 WO2010021566A1 (fr) 2008-08-06 2009-03-17 Joint labyrinthe pour une turbine à vapeur

Country Status (2)

Country Link
RU (1) RU2362887C1 (fr)
WO (1) WO2010021566A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104481595A (zh) * 2014-11-12 2015-04-01 上海发电设备成套设计研究院 一种汽轮机蜂窝对齿汽封装置
EP2857639A1 (fr) * 2013-10-01 2015-04-08 Siemens Aktiengesellschaft Anneau d'étanchéité
CN105156680A (zh) * 2015-09-14 2015-12-16 沈阳航空航天大学 一种提高封严特性与阻尼特性的新型蜂窝密封结构

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2447294C2 (ru) * 2010-02-02 2012-04-10 Сергей Владимирович Ушинин Вставка сотового надбандажного уплотнения паровой турбины и способ установки вставок сотового надбандажного уплотнения
RU2499144C2 (ru) * 2011-12-01 2013-11-20 Общество с ограниченной ответственностью "Научно-производственное предприятие Вакууммаш" Лабиринтное надбандажное уплотнение для паровой турбины
RU2499143C2 (ru) * 2012-02-29 2013-11-20 Общество с ограниченной ответственностью "Научно-производственное предприятие Вакууммаш" Надбандажное прирабатываемое уплотнение для паровой турбины
RU2509896C1 (ru) * 2012-08-01 2014-03-20 Общество с ограниченной ответственностью "Научно-производственное предприятие Вакууммаш" Надбандажное лабиринтное уплотнение для паровой турбины
FR3022578B1 (fr) * 2014-06-23 2016-06-03 Snecma Procede de realisation et de reparation d’un distributeur de turbine d’une turbomachine
RU171111U1 (ru) * 2016-12-01 2017-05-22 федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") Периферийное уплотнение паровой турбины
RU187735U1 (ru) * 2017-06-06 2019-03-15 ФЕДЕРАЛЬНОЕ ГОСУДАРСТВЕННОЕ БЮДЖЕТНОЕ ОБРАЗОВАТЕЛЬНОЕ УЧРЕЖДЕНИЕ ВЫСШЕГО ОБРАЗОВАНИЯ "Брянский государственный технический университет" Унифицированное сотовое уплотнение турбомашины
RU206652U1 (ru) * 2021-04-30 2021-09-21 федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") Уплотнение влажнопаровой ступени турбины

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2150627C1 (ru) * 1999-03-31 2000-06-10 Государственное научно-производственное предприятие "Мотор" Сотовое уплотнение, преимущественно для паровой турбины
RU2244182C1 (ru) * 2003-08-05 2005-01-10 ИВАХ Александр Фёдорович Лабиринтное уплотнение
DE112004001576T5 (de) * 2003-09-03 2006-07-20 General Electric Co. Expandierende Dichtungsstreifen für Dampfturbinen
RU2287063C1 (ru) * 2005-04-12 2006-11-10 Александр Федорович Ивах Лабиринтное уплотнение для паровой турбины
US20080175706A1 (en) * 2007-01-09 2008-07-24 Kabushiki Kaisha Toshiba Steam turbine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2150627C1 (ru) * 1999-03-31 2000-06-10 Государственное научно-производственное предприятие "Мотор" Сотовое уплотнение, преимущественно для паровой турбины
RU2244182C1 (ru) * 2003-08-05 2005-01-10 ИВАХ Александр Фёдорович Лабиринтное уплотнение
DE112004001576T5 (de) * 2003-09-03 2006-07-20 General Electric Co. Expandierende Dichtungsstreifen für Dampfturbinen
RU2287063C1 (ru) * 2005-04-12 2006-11-10 Александр Федорович Ивах Лабиринтное уплотнение для паровой турбины
US20080175706A1 (en) * 2007-01-09 2008-07-24 Kabushiki Kaisha Toshiba Steam turbine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2857639A1 (fr) * 2013-10-01 2015-04-08 Siemens Aktiengesellschaft Anneau d'étanchéité
WO2015049083A3 (fr) * 2013-10-01 2015-11-12 Siemens Aktiengesellschaft Bague d'étanchéité
CN104481595A (zh) * 2014-11-12 2015-04-01 上海发电设备成套设计研究院 一种汽轮机蜂窝对齿汽封装置
CN105156680A (zh) * 2015-09-14 2015-12-16 沈阳航空航天大学 一种提高封严特性与阻尼特性的新型蜂窝密封结构

Also Published As

Publication number Publication date
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