EP1276972A1 - Turbine - Google Patents
TurbineInfo
- Publication number
- EP1276972A1 EP1276972A1 EP01911696A EP01911696A EP1276972A1 EP 1276972 A1 EP1276972 A1 EP 1276972A1 EP 01911696 A EP01911696 A EP 01911696A EP 01911696 A EP01911696 A EP 01911696A EP 1276972 A1 EP1276972 A1 EP 1276972A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- turbine
- sealing element
- base plate
- plates
- gas space
- 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.)
- Granted
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
- 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
Definitions
- the invention relates to a turbine, in particular a gas turbine.
- a hot gas is passed through the turbine, as a result of which a shaft with rotor blades arranged thereon is turned on.
- This wave is usually connected to a generator to generate energy.
- the blades extend radially outward.
- Fixed guide vanes are arranged in the opposite direction, ie radially from the outside inwards. When viewed in the longitudinal direction of the turbine, the guide vanes and the rotor blades engage with one another in a tooth-like manner.
- the turbine generally has several turbine stages, with a guide vane ring being arranged in each stage, i.e.
- the guide vanes are arranged next to one another in the circumferential direction of the turoin.
- the individual guide vane rings are arranged in succession in the axial direction.
- the flow path of the hot gas through the turbine is referred to below as the gas space.
- the guide vanes each comprise a blade leaf which extends radially into the gas space and is attached to a base plate, by means of which the guide blade is fastened to a so-called guide blade carrier.
- the individual base plates of the guide vanes form an essentially closed surface and limit the gas space to the outside. In order to achieve the smallest possible leakage gaps between the individual foot plates, seals are generally provided between the individual foot plates.
- the massive formation of the edge area in which the groove for the sealing plate is arranged is problematic with regard to the thermal load on the footplate. Due to the high temperatures in the turbine, the base plates are usually cooled with a coolant. For the massive
- a further sealing variant consists in resetting the grooves and the sealing plate from the hot gas side on the gas space side, and introducing an undercut in the solid edge area below the sealing element. Again, there is the problem of the coolant flowing through this undercut to a sufficient extent.
- a third seal variant, according to which even cooling channels are incorporated into the body of the foot plate, is manoeuvrable on manufacturing technology ⁇ . In particular, the problem is raised that to form the cooling channels when casting the footplate
- the core must be cast in, which is positioned using spacers.
- the core as well as the spacers will be removed after casting by suitable measures so that the cavities thus formed can be used as cooling channels.
- the invention has for its object to provide the seal between adjacent guide vanes suitable for simple cooling in a turbine.
- a turbine in particular by a gas turbine, with a gas space and with a number of guide vanes, each having a base plate and an airfoil extending radially from the base plate into the gas space, with between the base plates
- Adjacent guide vanes each have a sealing element with a receiving area into which the base plates extend.
- the sealing element viewed in cross section, is H-shaped with two longitudinal legs connected via a cross leg, with between the Long legs two receiving areas separated from the transverse leg are formed, into each of which the base plates of adjacent guide vanes extend.
- the sealing element thus partially covers the adjacent foot plates with its two longitudinal legs, so that in addition to the sealing property, the foot plates are held by the sealing element.
- the sealing element is preferably arranged between adjacent guide vanes in the turbine circumferential direction.
- the base plates each have a side edge which is in particular radially bent outwards from the gas space, the sealing element being arranged between two side edges of adjacent guide vanes. This increases the effective sealing height of the seal without increasing the plate thickness of the base plate.
- the two bent side edges of the foot plates are in particular in contact with the cross leg of the H-shaped sealing element.
- the side edge has essentially the same material thickness as the rest of the footplate.
- the front of the footplate facing the gas space in the area of the sealing element has a support surface set back from the gas space, on which the sealing element rests.
- the sealing element preferably closes flush with the footplate.
- a flow path in the form of a leakage gap for air is present between the sealing element and the base plates for cooling the sealing element. So there is no absolute tightness aimed at keep thermal stress in the area of the sealing element and on the side edges of the footplate low.
- the outer space around the gas space in a turbine is kept at a higher pressure than the gas space, so that air enters the gas space from the outside via the leakage gap and hot gas is prevented from escaping from the gas space.
- a closed cooling system through which a coolant can flow is arranged in the rear region of the footplates, ie, in the outer space, facing away from the gas space.
- the coolant here is in particular steam.
- a liquid such as water or another gas such as air or hydrogen is also used as the coolant.
- the back of the foot plates facing away from the gas space can in particular be directly overflowed by the coolant, so that a direct heat exchange takes place between the coolant and the foot plate.
- an inflow channel for the coolant is formed between an outer baffle plate and a baffle plate, the baffle plate being arranged between the outer baffle plate and the foot plate and having flow openings towards the foot plate, and between the baffle plate and Base plate is a backflow channel for the cooling medium is formed.
- a closed cooling system which has a high cooling effect is thus easily realized.
- the coolant is supplied via the inflow channel and directed at the base plate at high speed via the flow openings in the baffle plate, which are designed in particular as nozzles, so that an intensive heat exchange takes place between the coolant and the base plate.
- the heated coolant is then removed in the return flow channel.
- the baffle plate is preferably supported on the base plate by means of a support element, so that the baffle plate is held at a defined distance from the base plate.
- the baffle is preferably attached to the bent side edge of the footplate and the baffle is particularly attached to the baffle.
- the sealing element described is preferably provided for the sealing in the circumferential direction and a further sealing element for the sealing in the axial direction.
- a further sealing element for the sealing in the axial direction.
- the further sealing element preferably connects the base plates to one another in a clamp-like manner on their rear sides facing away from the gas space.
- the main advantage can be seen in the bracket-like configuration of the further sealing element, which spans the two base plates.
- the further sealing element is designed to be elastic in particular in several directions, so that it follows the footplates in the case of thermal expansions without exposing a gap. The seal by the further sealing element is therefore largely unaffected by thermal expansions.
- FIG. 1 shows a turbine system
- FIG. 2 shows the sealing area between two base plates adjacent to one another in the circumferential direction of the turbine, in a conventional embodiment
- 3 shows the ao-sealing area in an embodiment according to the invention
- FIG. 4 shows a seal provided, in particular, for foot plates arranged next to one another in the axial direction of the turbine system.
- a turbine system 2 in particular a gas turbine system of a turboset for a power plant for energy generation, comprises a combustion chamber 4 and a turbine 6, which is arranged in the longitudinal or axial direction 8 of the turbine system 2 after the combustion chamber 4.
- the turbine 6 is shown in an advanced section so that a view of the gas space 12 of the turbine 6 is omitted.
- the flow path of a hot gas HG through the turbine 6 is designated as the gas space 12.
- the combustion chamber 4 is supplied with a fuel gas BG via a gas supply 14, which is burned in the combustion chamber 4 and forms the hot gas HG mentioned.
- the hot gas HG flows through the turbine 6 and leaves it as
- the hot gas HG is guided in the turbine 6 via guide vanes 18 and rotor blades 20.
- a shaft 22 is driven, on which the moving blades 20 are arranged.
- the shaft 22 is connected to a generator 24 for generating electrical energy.
- the runners 20 extend radially outward from the shaft 22.
- the guide vanes 18 have a base plate 21 and an airfoil 23 fastened thereon.
- the guide vanes 20 are each fastened via their base plates 21 to a so-called guide vane carrier 26 on the outside of the turbine 6 and extend radially in the gas space 12. Seen in the longitudinal direction 8, the guide vanes 18 and the rotor blades 20 engage in a tooth-like manner.
- Several of the rotor blades 20 and the guide blades 18 are each combined to form a ring, each guide blade ring one Represents turbine stage.
- the second turbine stage 28 and the third turbine stage 30 are shown as examples.
- the base plates 21 of the individual guide vanes 18 adjoin one another both in the axial direction 8 and in the circumferential direction 32 of the turbine 6 and limit the gas space 12 to the outside.
- the adjacent foot plates 21 are sealed off from one another in order to keep leakage gaps 34 between them as small as possible.
- the conventional sealing principle is reversed, so that the foot plates 21 now extend into a sealing element 44.
- the sealing element 44 is H-shaped when viewed in cross section and has two longitudinal legs 46, which are connected via a transverse leg 48. are connected.
- the sealing element 44 is therefore designed in the manner of a “double-T support”. Between the two longitudinal legs 46, two receiving areas 50 are formed, separated from the transverse leg 48, into which the foot plates 21 extend.
- Sealing element 44 is T-shaped, that is to say with only one longitudinal leg 46. With such a sealing element 44, the receiving spaces formed are open.
- the front sides 52 of the foot plates 21 oriented toward the gas space 12 each have in the region of the sealing element 44 a support surface 54 set back from the gas space 12, on which one longitudinal leg 56 of the sealing element 44 rests.
- the base plate 21 is designed step-like in the area of the sealing element 44.
- the end regions of the foot plates 21, which adjoin the step, are bent approximately perpendicularly from the gas space 12 to the outside and each form a bent or radially extending side edge 56.
- the side edges 56 of the adjacent foot plates 21 nestle directly against the transverse leg 48. As a result, the sealing height H is increased without the base plate 21 being made stronger in the sealing area.
- a flow path 58 designed as a leakage gap is formed between the sealing element 44 and at least one of the foot plates 21, so that, for example, air can flow from the gas space 12 away from the outer space 60 via the flow path 58 into the gas space 12 and thus the sealing area, i.e. the sealing element 44 and the side edges 56 cools.
- a closed cooling system 62 is provided in particular, which preferably uses steam as the cooling agent and which is shown in detail in FIG.
- This closed cooling system 62 has an inflow channel 64 and a return flow channel 66.
- the inflow channel 64 is between an outer baffle 68 and one
- Baffle plate 70 is formed, which is arranged between the guide plate 68 and the base plate 21.
- the baffle 70 has Flow openings 72, which are designed in the manner of nozzles, so that coolant supplied via the inflow channel 64 passes into the return flow channel 66 along the arrows shown. Due to the nozzle-like mode of operation of the flow openings 72, the coolant is directed against the rear side 74 of the base plate 21 at high speed, so that an effective heat transfer between the coolant and the base plate 21 is realized.
- the baffle plate 70 is supported against the base plate 21 and held at a distance via support elements 76, for example in the form of welding spots or welding webs.
- the baffle plate 70 is fixed directly to the side edge 56 of the foot plate 21, in particular welded on, and the baffle plate 68 is fastened to the baffle plate 70.
- the sealing arrangement shown in FIG. 3 is provided in particular for two guide vanes 18 adjacent in the circumferential direction 32.
- the inflow ducts 64 and the backflow ducts 66 shown therefore extend in the axial direction 8 of the turbine 6.
- the base plates 21 of a guide vane ring are thus sealed off from one another via the H-shaped sealing element 44.
- this seal is less suitable for foot plates 21 of successive turbine stages 28, 30 adjacent in the axial direction 8, although in principle it is possible.
- a further sealing element 80 is preferably provided for the sealing of foot plates 21 which adjoin one another in the axial direction 8 and which connects the foot plates 21 to one another at their rear sides 74 in a clamp-like manner.
- the further sealing element 80 is t is interrupted in slots 82 and secured, the hineinerarranged substantially radially from the rear side 74 in the foot plates 21st
- the further sealing element 80 is, as shown in FIG. 4, for example U-shaped with two connected via an arc 84 designed the leg 86.
- the further sealing element 80 is provided with a corrugated structure in the manner of a bellows.
- FIG. 4 also shows hooking elements 88 which are arranged on the rear sides 74 and with which the guide blades 1.n are hooked onto the guide blade carrier 26 (cf. FIG. 1).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01911696A EP1276972B1 (de) | 2000-03-02 | 2001-02-23 | Turbine |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00104345A EP1130218A1 (de) | 2000-03-02 | 2000-03-02 | Turbine mit Dichtelement für die Fussplatten der Leitschaufeln |
EP00104345 | 2000-03-02 | ||
PCT/EP2001/002095 WO2001065074A1 (de) | 2000-03-02 | 2001-02-23 | Turbine |
EP01911696A EP1276972B1 (de) | 2000-03-02 | 2001-02-23 | Turbine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1276972A1 true EP1276972A1 (de) | 2003-01-22 |
EP1276972B1 EP1276972B1 (de) | 2004-04-14 |
Family
ID=8168007
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00104345A Withdrawn EP1130218A1 (de) | 2000-03-02 | 2000-03-02 | Turbine mit Dichtelement für die Fussplatten der Leitschaufeln |
EP01911696A Expired - Lifetime EP1276972B1 (de) | 2000-03-02 | 2001-02-23 | Turbine |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00104345A Withdrawn EP1130218A1 (de) | 2000-03-02 | 2000-03-02 | Turbine mit Dichtelement für die Fussplatten der Leitschaufeln |
Country Status (6)
Country | Link |
---|---|
US (1) | US6705832B2 (de) |
EP (2) | EP1130218A1 (de) |
JP (1) | JP4660051B2 (de) |
CN (1) | CN1278020C (de) |
DE (1) | DE50101990D1 (de) |
WO (1) | WO2001065074A1 (de) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003035105A (ja) * | 2001-07-19 | 2003-02-07 | Mitsubishi Heavy Ind Ltd | ガスタービン分割壁 |
US20050034399A1 (en) * | 2002-01-15 | 2005-02-17 | Rolls-Royce Plc | Double wall combustor tile arrangement |
JP4825795B2 (ja) * | 2004-05-07 | 2011-11-30 | ベクトン・ディキンソン・アンド・カンパニー | 回転作動式医療用穿刺装置 |
ES2378375T3 (es) * | 2005-02-07 | 2012-04-11 | Siemens Aktiengesellschaft | Pantalla térmica |
EP1731714A1 (de) * | 2005-06-08 | 2006-12-13 | Siemens Aktiengesellschaft | Spaltsperrvorrichtung und Verwendung einer solchen |
US7670108B2 (en) * | 2006-11-21 | 2010-03-02 | Siemens Energy, Inc. | Air seal unit adapted to be positioned adjacent blade structure in a gas turbine |
US20090110546A1 (en) * | 2007-10-29 | 2009-04-30 | United Technologies Corp. | Feather Seals and Gas Turbine Engine Systems Involving Such Seals |
EP2265801B1 (de) * | 2008-03-18 | 2017-12-13 | GKN Aerospace Sweden AB | Gasturbinengehäusekomponente |
JP4815536B2 (ja) * | 2010-01-12 | 2011-11-16 | 川崎重工業株式会社 | ガスタービンエンジンのシール構造 |
US8359865B2 (en) * | 2010-02-04 | 2013-01-29 | United Technologies Corporation | Combustor liner segment seal member |
US8359866B2 (en) * | 2010-02-04 | 2013-01-29 | United Technologies Corporation | Combustor liner segment seal member |
JP5546420B2 (ja) | 2010-10-29 | 2014-07-09 | 三菱重工業株式会社 | タービン |
US9534783B2 (en) * | 2011-07-21 | 2017-01-03 | United Technologies Corporation | Insert adjacent to a heat shield element for a gas turbine engine combustor |
FR2978197B1 (fr) * | 2011-07-22 | 2015-12-25 | Snecma | Distributeur de turbine de turbomachine et turbine comportant un tel distributeur |
US20130134678A1 (en) * | 2011-11-29 | 2013-05-30 | General Electric Company | Shim seal assemblies and assembly methods for stationary components of rotary machines |
EP3092372B1 (de) | 2014-01-08 | 2019-06-19 | United Technologies Corporation | Klemmdichtung für strahltriebwerk-mittelturbinenrahmen |
EP3099903B1 (de) * | 2014-01-28 | 2020-04-22 | United Technologies Corporation | Dichtung für mittelturbinenrahmen eines düsentriebwerks |
EP3099921B1 (de) * | 2014-01-28 | 2019-01-16 | United Technologies Corporation | Prallstruktur für einen mittelturbinenrahmen eines strahltriebwerks |
US9869201B2 (en) * | 2015-05-29 | 2018-01-16 | General Electric Company | Impingement cooled spline seal |
CN105704982B (zh) | 2015-12-18 | 2017-12-22 | 上海联影医疗科技有限公司 | 一种用于医学成像装置的冷却系统 |
US10378772B2 (en) * | 2017-01-19 | 2019-08-13 | General Electric Company | Combustor heat shield sealing |
US10954809B2 (en) * | 2017-06-26 | 2021-03-23 | Rolls-Royce High Temperature Composites Inc. | Ceramic matrix full hoop blade track |
US10697315B2 (en) * | 2018-03-27 | 2020-06-30 | Rolls-Royce North American Technologies Inc. | Full hoop blade track with keystoning segments |
US11319827B2 (en) * | 2019-04-01 | 2022-05-03 | Raytheon Technologies Corporation | Intersegment seal for blade outer air seal |
CN113623020B (zh) * | 2021-08-02 | 2022-07-08 | 无锡友鹏航空装备科技有限公司 | 一种密封性高的涡轮导向装置 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3728041A (en) * | 1971-10-04 | 1973-04-17 | Gen Electric | Fluidic seal for segmented nozzle diaphragm |
JPS59172243U (ja) * | 1983-05-06 | 1984-11-17 | 株式会社日立製作所 | ガスタ−ビン用トランジイシヨンピ−ス |
JPS6022002A (ja) * | 1983-07-18 | 1985-02-04 | Hitachi Ltd | タ−ボ機械の翼構造 |
US4859143A (en) * | 1987-07-08 | 1989-08-22 | United Technologies Corporation | Stiffening ring for a stator assembly of an axial flow rotary machine |
US4902198A (en) * | 1988-08-31 | 1990-02-20 | Westinghouse Electric Corp. | Apparatus for film cooling of turbine van shrouds |
CA2031085A1 (en) * | 1990-01-16 | 1991-07-17 | Michael P. Hagle | Arrangement for sealing gaps between adjacent circumferential segments of turbine nozzles and shrouds |
US5088888A (en) * | 1990-12-03 | 1992-02-18 | General Electric Company | Shroud seal |
GB9305012D0 (en) * | 1993-03-11 | 1993-04-28 | Rolls Royce Plc | Sealing structures for gas turbine engines |
JP3564167B2 (ja) * | 1994-05-11 | 2004-09-08 | 三菱重工業株式会社 | 分割環の冷却構造 |
US5634766A (en) * | 1994-08-23 | 1997-06-03 | General Electric Co. | Turbine stator vane segments having combined air and steam cooling circuits |
US5531457A (en) * | 1994-12-07 | 1996-07-02 | Pratt & Whitney Canada, Inc. | Gas turbine engine feather seal arrangement |
US5823741A (en) * | 1996-09-25 | 1998-10-20 | General Electric Co. | Cooling joint connection for abutting segments in a gas turbine engine |
US6076835A (en) * | 1997-05-21 | 2000-06-20 | Allison Advanced Development Company | Interstage van seal apparatus |
EP0921273B1 (de) * | 1997-06-11 | 2003-12-03 | Mitsubishi Heavy Industries, Ltd. | Rotor für gasturbinen |
GB2335470B (en) * | 1998-03-18 | 2002-02-13 | Rolls Royce Plc | A seal |
-
2000
- 2000-03-02 EP EP00104345A patent/EP1130218A1/de not_active Withdrawn
-
2001
- 2001-02-23 JP JP2001563751A patent/JP4660051B2/ja not_active Expired - Fee Related
- 2001-02-23 CN CNB01805949XA patent/CN1278020C/zh not_active Expired - Fee Related
- 2001-02-23 US US10/220,490 patent/US6705832B2/en not_active Expired - Fee Related
- 2001-02-23 WO PCT/EP2001/002095 patent/WO2001065074A1/de active IP Right Grant
- 2001-02-23 DE DE50101990T patent/DE50101990D1/de not_active Expired - Lifetime
- 2001-02-23 EP EP01911696A patent/EP1276972B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0165074A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP4660051B2 (ja) | 2011-03-30 |
JP2003525382A (ja) | 2003-08-26 |
US6705832B2 (en) | 2004-03-16 |
WO2001065074A1 (de) | 2001-09-07 |
EP1276972B1 (de) | 2004-04-14 |
CN1408049A (zh) | 2003-04-02 |
US20030021676A1 (en) | 2003-01-30 |
CN1278020C (zh) | 2006-10-04 |
DE50101990D1 (en) | 2004-05-19 |
EP1130218A1 (de) | 2001-09-05 |
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