EP1076160A2 - Befestigungsvorrichtung für Hitzeschutzschilde - Google Patents
Befestigungsvorrichtung für Hitzeschutzschilde Download PDFInfo
- Publication number
- EP1076160A2 EP1076160A2 EP00810685A EP00810685A EP1076160A2 EP 1076160 A2 EP1076160 A2 EP 1076160A2 EP 00810685 A EP00810685 A EP 00810685A EP 00810685 A EP00810685 A EP 00810685A EP 1076160 A2 EP1076160 A2 EP 1076160A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- radial
- receiving elements
- heat
- shield
- fastening
- 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
Images
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
- 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
- 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
- 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
- F01D11/12—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible. deformable or resiliently-biased part
Definitions
- the invention relates to a fastening device for heat shields according to the preamble of the independent claim.
- Heat shields are used in thermal turbo machines, such as Gas turbines used. You are there in the axial direction between the Row of blades arranged, and protect the rotor or the housing direct contact with hot gas.
- the invention seeks to remedy this.
- the invention as in the Is characterized, the task is based on one Heat shield deformation to compensate for thermal expansions in allow a certain amount, but especially radial Limit deformations to a well-defined level with certainty.
- the essence of the invention is therefore to provide a heat protection shield by means of an axial outside located receiving elements in the housing or on the shaft of a Fix turbo machine, and by arranged between them additional receiving elements a safety device to catch to create excessive radial deformations.
- additional receiving elements a safety device to catch to create excessive radial deformations.
- the heat protection shield is the farthest in axial section through the external receiving elements fixed in the radial direction.
- the radial one Storage of the heat shield on two far apart Scoring on the one hand improves the stability of the storage. On the other hand minimizes the axial overhang of the heat shield, thereby Vibrations of the heat protection shield are best prevented.
- FIG. 1 shows a Longitudinal section through part of a gas turbine
- Fig. 2 shows the environment of a heat protection shield mounted in this gas turbine.
- Fig. 1 is an axial section through a four-stage turbine Gas turbine set shown.
- shaft 1 rotates around the Machine axis 3.
- the rotor blades LA1 to LA4 are on shaft 1 arranged.
- the associated guide vanes LE1 to LE4 are in the housing 2 attached.
- the rotor heat shields are opposite the guide vane tips 110, 120, 130 and 140 using suitable fasteners on the rotor attached.
- the housing heat shields are analogous to the blade tips 210, 220, 230 and 240 in a suitable manner on the housing attached. In reality, you do not necessarily become every level Find heat shields; in practice you will be in the final stages, in which the working medium is already very relaxed and cooled, often do without them.
- the use of heat shields is included the fastening device according to the invention in no way on the turbine of a gas turbine set:
- the invention can also be used, for example, in Steam turbines or in turbocompressors, and just there in the High-pressure stages of modern turbocompressors can be used with advantage.
- FIG. 2 is the immediate vicinity of the housing heat shield 220 the second turbine stage is shown enlarged.
- the Attachment of the heat shield 220 in the housing 2 by means of three as Hook trained receiving elements 221, 222, 223, each in associated housing grooves are easy to see.
- Towards the Machine longitudinal axis 3 is the heat shield only by that Receiving element 221 fixed, while the receiving elements 222 and 223 with axial play in the associated grooves. In the given by R. In the radial direction, the receiving elements 221 and 223 are free of play in their Anchored housing grooves.
- the heat shield is 220 in the radial direction So by the two axially outer receiving elements 221 and 223 in Housing fixed.
- the receiving element 222 however, has both axially also radial play in its housing groove, and will in normal Operating status does not fulfill any fastening function.
- the heat shield 220 is heated very much, and it will become axially as well as in the radial direction against both the blade LA2 and also set 2 differential thermal expansions against the housing. Out for this reason, the play of the receiving element 222 is in particular its fastening groove is important as a strong stretch Residual stresses in the heat shield 220 would induce what would ultimately result would lead to a sharp reduction in component life. Radial Guide deformations away from the tip of the opposite blade to increased gap losses and a lower efficiency of Machine, but do not endanger operational safety at first.
- the middle receiving element - in principle can between the axially outer receiving elements also several recording elements with play in the associated Fastening groove be arranged - exceeds, the middle begins Carrying element in the radial direction, and prevents them Excessive radial deformation of the heat shield.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
- 1
- Rotor
- 2
- Gehäuse
- 3
- Maschinenachse
- 110
- Rotor-Hitzeschutzschild der ersten Turbinenstufe
- 120
- Rotor-Hitzeschutzschild der zweiten Turbinenstufe
- 130
- Rotor-Hitzeschutzschild der dritten Turbinenstufe
- 140
- Rotor-Hitzeschutzschild der vierten Turbinenstufe
- 210
- Gehäuse-Hitzeschutzschild der ersten Turbinenstufe
- 220
- Gehäuse-Hitzeschutzschild der zweiten Turbinenstufe
- 221
- Aufnahmeelement
- 222
- Aufnahmeelement
- 223
- Aufnahmeelement
- 230
- Gehäuse-Hitzeschutzschild der dritten Turbinenstufe
- 240
- Gehäuse-Hitzeschutzschild der vierten Turbinenstufe
- h
- maximales radiales Mass des Hitzeschutzschildes
- s
- radiales Spiel des mitteleren Aufnahmeelementes in Richtung zum dem Hitzeschutzschild gegenüberliegenden Bauteil
- LA1
- Laufschaufel der ersten Turbinenstufe
- LA2
- Laufschaufel der zweiten Turbinenstufe
- LA3
- Laufschaufel der dritten Turbinenstufe
- LA4
- Laufschaufel der vierten Turbinenstufe
- LE1
- Leitschaufel der ersten Turbinenstufe
- LE2
- Leitschaufel der zweiten Turbinenstufe
- LE3
- Leitschaufel der dritten Turbinenstufe
- LE4
- Leitschaufel der vierten Turbinenstufe
- R
- radiale Richtung
Claims (4)
- Befestigungsvorrichtung zur Befestigung von Hitzeschutzschilden (110, 120, 130, 140, 210, 220, 230, 240) in einer Turbomaschine, durch welche Befestigungsvorrichtung die Hitzeschutzschilde in einer radialen und einer axialen Einbauposition fixiert werden, welche Befestigungsvorrichtung aus einer Mehrzahl von Aufnahmeelementen (221, 222, 223) besteht, welche Aufnahmeelemente in wenigstens drei unterschiedlichen axialen Einbaupositionen an dem Hitzeschutzschild angeordnet sind, und welche Aufnahmeelemente im Einbauzustand in Befestigungsnuten einer Welle (1) oder eines Gehäuses (2) der Turbomaschine eingreifen, dadurch gekennzeichnet, dass die axial am weitesten aussen liegenden Aufnahmeelemente (221, 223) im Einbauzustand in radialer Richtung (R) spielfrei in den Befestigungsnuten angeordnet sind, und die axial zwischen diesen angeordneten Aufnahmeelemente (222) ein radiales Spiel (s) in der Befestigungsnut aufweisen.
- Befestigungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Aufnahmeelemente als Haken ausgebildet sind.
- Befestigungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das radiale Spiel (s) kleiner als 20% eines Masses h ist, wobei das Mass h als das Mass von der im Betrieb von Heissgas überströmten Seite des Hitzeschutzschildes bis zu der am weitesten von dieser entfernten Stelle eines Aufnahmeelementes ist.
- Befestigungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das radiale Spiel (s) zwischen 0,1 mm und 5 mm beträgt
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19936761A DE19936761A1 (de) | 1999-08-09 | 1999-08-09 | Befestigungsvorrichtung für Hitzeschutzschilde |
| DE19936761 | 1999-08-09 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1076160A2 true EP1076160A2 (de) | 2001-02-14 |
| EP1076160A3 EP1076160A3 (de) | 2003-11-19 |
| EP1076160B1 EP1076160B1 (de) | 2008-11-19 |
Family
ID=7917200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00810685A Expired - Lifetime EP1076160B1 (de) | 1999-08-09 | 2000-07-31 | Befestigungsvorrichtung für Hitzeschutzschilde |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6361274B1 (de) |
| EP (1) | EP1076160B1 (de) |
| DE (2) | DE19936761A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2391045A (en) * | 2002-07-19 | 2004-01-28 | Corac Group Plc | Rotary machine with means for separating impurites from a gas flow |
| US20060078429A1 (en) * | 2004-10-08 | 2006-04-13 | Darkins Toby G Jr | Turbine engine shroud segment |
| US8128344B2 (en) * | 2008-11-05 | 2012-03-06 | General Electric Company | Methods and apparatus involving shroud cooling |
| CN119593817A (zh) * | 2024-11-26 | 2025-03-11 | 西安西热节能技术有限公司 | 一种自适应调节间隙的轮缘密封结构、透平及汽轮机 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3860358A (en) * | 1974-04-18 | 1975-01-14 | United Aircraft Corp | Turbine blade tip seal |
| US4247247A (en) * | 1979-05-29 | 1981-01-27 | General Motors Corporation | Blade tip clearance control |
| US4621979A (en) * | 1979-11-30 | 1986-11-11 | United Technologies Corporation | Fan rotor blades of turbofan engines |
| JPS5857658B2 (ja) * | 1980-04-02 | 1983-12-21 | 工業技術院長 | セラミツクスによる高熱曝露壁面の熱遮断構造 |
| DE3018620C2 (de) * | 1980-05-16 | 1982-08-26 | MTU Motoren- und Turbinen-Union München GmbH, 8000 München | Wärmedämmende und dichtende Auskleidung für eine thermische Turbomaschine |
| GB2103294B (en) * | 1981-07-11 | 1984-08-30 | Rolls Royce | Shroud assembly for a gas turbine engine |
| DE3316535A1 (de) * | 1983-05-06 | 1984-11-08 | MTU Motoren- und Turbinen-Union München GmbH, 8000 München | Turboverdichter mit einlaufbelag |
| US4784569A (en) * | 1986-01-10 | 1988-11-15 | General Electric Company | Shroud means for turbine rotor blade tip clearance control |
| WO1989012789A1 (fr) * | 1988-06-13 | 1989-12-28 | Siemens Aktiengesellschaft | Bouclier thermique n'exigeant que peu de fluide de refroidissement |
| US5127794A (en) * | 1990-09-12 | 1992-07-07 | United Technologies Corporation | Compressor case with controlled thermal environment |
| FR2761119B1 (fr) * | 1997-03-20 | 1999-04-30 | Snecma | Stator de compresseur de turbomachine |
| DE19938443A1 (de) * | 1999-08-13 | 2001-02-15 | Abb Alstom Power Ch Ag | Befestigungs- und Fixierungsvorrichtung |
-
1999
- 1999-08-09 DE DE19936761A patent/DE19936761A1/de not_active Withdrawn
-
2000
- 2000-07-31 DE DE50015453T patent/DE50015453D1/de not_active Expired - Lifetime
- 2000-07-31 EP EP00810685A patent/EP1076160B1/de not_active Expired - Lifetime
- 2000-08-04 US US09/632,795 patent/US6361274B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| None |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19936761A1 (de) | 2001-05-10 |
| EP1076160B1 (de) | 2008-11-19 |
| DE50015453D1 (de) | 2009-01-02 |
| EP1076160A3 (de) | 2003-11-19 |
| US6361274B1 (en) | 2002-03-26 |
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