EP2173974A1 - Hitzeschildsegment für einen stator einer gasturbine - Google Patents
Hitzeschildsegment für einen stator einer gasturbineInfo
- Publication number
- EP2173974A1 EP2173974A1 EP08761301A EP08761301A EP2173974A1 EP 2173974 A1 EP2173974 A1 EP 2173974A1 EP 08761301 A EP08761301 A EP 08761301A EP 08761301 A EP08761301 A EP 08761301A EP 2173974 A1 EP2173974 A1 EP 2173974A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat shield
- turbine
- shield segment
- circumferential direction
- elevation
- 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
- F01D9/00—Stators
- F01D9/06—Fluid supply conduits to nozzles or the like
-
- 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
- F05D2240/10—Stators
- F05D2240/11—Shroud seal segments
-
- 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
- F05D2260/00—Function
- F05D2260/20—Heat transfer, e.g. cooling
- F05D2260/231—Preventing heat transfer
Definitions
- the invention relates to a heat shield segment for a stator of a gas turbine, according to the preamble of claim 1.
- the turbine rotor of a gas turbine is usually surrounded in the radial direction by a housing that is usually referred to in this area as a heat shield.
- the heat shield may include a number of heat shield segments, wherein the heat shield forms an outer boundary of a hot gas flow along the turbine blades.
- the heat shield prevents hot combustion gases from entering the cooling air filled cavity between the heat shield and a radially outer housing.
- the heat shield may have different shapes and the inner shape of the heat shield defines the flow area of the hot air flow in the turbine.
- the turbine blades of the turbine rotor usually have a circumferential, arranged on the radial outer side of the turbine rotor, depending on the flow conditions cylindrically or conically extending shroud.
- the shroud usually has two on its radial outside radially outwardly extending sealing ribs.
- the two sealing ribs in the radial direction opposite to the heat shield each honeycomb structures are fixedly connected, which serve to seal the distance between the sealing ribs and the heat shield.
- the inner shape of the heat shield in a first honeycomb structure portion is parallel to the longitudinal axis of the turbine. Upstream of the first flat section, the inner shape of the heat shield may be inclined in a second section to the longitudinal axis of the turbine. Since the heat shield is exposed to the high temperature of the hot air flow and the high pressure loss in the flow direction, it may lead to high stress concentrations in the curved portion of the heat shield between the first portion and the second portion. These stresses can significantly reduce the life of the heat shield.
- the present invention has for its object to provide a heat shield segment for a stator of a gas turbine with an improved construction, which avoids the problems mentioned, that is, a construction which reduces the stresses in the curved portion of the heat shield segment.
- the heat shield segment for a stator of a gas turbine having the features of claim 1.
- Advantageous developments of the heat shield segment according to the invention will become apparent from the dependent claims.
- the heat shield segment has a curved section in at least one region of the profile in the longitudinal direction of the gas turbine, with a radially outer surface of the heat shield segment provided in the region of the curved section and in a first end region in the circumferential direction of the turbine with an elevation extending in the circumferential direction of the turbine is.
- the increase reduces the stresses in the heat shield segment in use and in the region of the curved section. This significantly prolongs the life of the heat shield.
- the length of the increase in the circumferential direction is less than a quarter of the total length of the heat shield segment in the circumferential direction.
- the heat shield segment is sufficiently reinforced, without having to provide a rib extending between the end regions, which avoids additional metal consumption, so that the weight of the heat shield can be kept low.
- Figure 1 is a perspective view of a heat shield segment according to a
- FIG. 2 shows a section through the heat shield segment in FIG. 1 in the region of the elevation along the line A-A,
- FIG. 3 shows a cross section through a turbine section with a
- Figure 4 is a perspective view of a heat shield segment according to the prior art.
- FIG. 4 shows a heat shield segment 1 according to the prior art.
- a heat shield may include a number of such heat shield segments 1 that form an outer boundary of a hot gas flow along the turbine blades 2 (see, e.g., Figure 3).
- the profile of the heat shield segment 1 adapts to the basically conical guidance of a turbine rotor (not shown), and has a stepped cross section, as can be seen from FIG.
- FIG. 3 shows a cross section through a turbine section with a heat shield segment according to the prior art.
- the turbine blades 2 of the turbine rotor have a circumferential, on the Radial outside of the turbine rotor arranged and cylindrically extending shroud 5 on.
- the shroud 5 has on its radial outer side two radially outwardly extending ribs 6.
- the two ribs 6 in the radial direction opposite to the heat shield segment 1 each honeycomb structures 7 are fixedly connected, which serve to seal the distance between the rib tip 6 and the heat shield segment 1.
- the inner mold 8 of the heat shield extends in a first section 9 substantially parallel to the longitudinal axis of the turbine.
- the inner mold 8 of the heat shield segment 1 in a second portion 1 1 extend obliquely to the longitudinal axis of the turbine, wherein the flow direction of the hot gas through the turbine with arrow 10 is designated. Since the heat shield segment 1 is exposed to the high temperature of the hot gas flow and the high pressure loss in the flow direction, it can in the curved portion 12 of the heat shield segment 1 between the first portion 9 and the second portion 1 1 and in particular in the end portions 13 of the heat shield segment 1 in the circumferential direction of Turbine lead to high voltages that can significantly limit the life of the heat shield segment 1.
- FIG. 1 shows a heat shield segment 1 according to a preferred embodiment of the invention. Identical components are provided with the same reference numerals.
- a radially outer side 15 of the heat shield segment 1 is provided in the region of the curved section 12 and in at least one end region 13 of the heat shield segment 1 in the circumferential direction with an elevation 14 or shoulder extending in the circumferential direction of the turbine. This increase or decrease reduces the stress concentration in this area of the heat shield segment 1.
- An elevation or projection may be provided at each end 13 of the heat shield segment 1, respectively.
- the elevation or neck in the longitudinal direction of the turbine is located at a location where the first portion 9 and the second portion 11 meet.
- the length of the elevation 14 in the circumferential direction is less than one quarter of the total length of the heat shield segment 1 in the circumferential direction.
- the additional metal consumption can be kept low because no running between the ends of the heat shield segment 1 rib must be provided. Thereby, the weight of the heat shield segment 1 can be kept low.
- the radially outer surface 15 of the heat shield segment 1 is provided with two ribs 16, which extend at least partially at the ends of the heat shield segment 1 in the circumferential direction of the turbine in the longitudinal direction of the turbine.
- the elevation 14 or projection protrudes from the respective rib 16 in the circumferential direction.
- the profile of the heat shield segment 1 in the circumferential direction of the turbine and in the region of the elevation 14 can have a two-stage shape, as can be seen from FIG.
- the length of the increase in the circumferential direction of the turbine to the width of the increase in the longitudinal direction of the turbine in the ratio of 1: 2 to 3: 1 behaves.
- the heat shield segment 1 has a curved section in at least two locations of the heat shield segment profile in the longitudinal direction of the turbine, that is to say that the heat shield cross section is formed essentially in two stages.
- the radial outside of the heat shield segment is in each case in the regions of the curved sections and in a first and / or a second end region each provided in the circumferential direction of the heat shield segment with a 14 extending in the circumferential direction of the turbine elevation.
- a heat shield may be provided with a number of heat shield segments 1 according to the invention which form an outer boundary of a hot gas flow along the turbine blades 2 (see, for example, Figure 3).
- the heat shield segments 1 are provided with a groove 17 running in the longitudinal direction of the turbine, in each case in the end sides, as can be seen from FIG.
- the grooves 17 of two adjacent heat shield segments 1 serve to receive a seal plate (not shown) which prevents the penetration of hot combustion gases into the cooling air filled cavity 18 between the heat shield and the turbine housing 19.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH10432007 | 2007-06-28 | ||
| PCT/EP2008/057946 WO2009000801A1 (de) | 2007-06-28 | 2008-06-23 | Hitzeschildsegment für einen stator einer gasturbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2173974A1 true EP2173974A1 (de) | 2010-04-14 |
| EP2173974B1 EP2173974B1 (de) | 2011-10-26 |
Family
ID=38508786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08761301A Active EP2173974B1 (de) | 2007-06-28 | 2008-06-23 | Hitzeschildsegment für einen stator einer gasturbine |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US8182210B2 (de) |
| EP (1) | EP2173974B1 (de) |
| AT (1) | ATE530736T1 (de) |
| CA (1) | CA2690705C (de) |
| SI (1) | SI2173974T1 (de) |
| TW (1) | TWI475152B (de) |
| WO (1) | WO2009000801A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542517A (zh) * | 2020-11-18 | 2022-05-27 | 浙江绍兴苏泊尔生活电器有限公司 | 导风组件及具有其的烹饪器具 |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8926269B2 (en) * | 2011-09-06 | 2015-01-06 | General Electric Company | Stepped, conical honeycomb seal carrier |
| EP2938863B1 (de) | 2012-12-29 | 2019-09-25 | United Technologies Corporation | Mechanische verbindung für segmentierten hitzeschild |
| US10233844B2 (en) | 2015-05-11 | 2019-03-19 | General Electric Company | System for thermally shielding a portion of a gas turbine shroud assembly |
| DE102016213810A1 (de) | 2016-07-27 | 2018-02-01 | MTU Aero Engines AG | Verkleidungselement für ein Turbinenzwischengehäuse |
| US10358922B2 (en) * | 2016-11-10 | 2019-07-23 | Rolls-Royce Corporation | Turbine wheel with circumferentially-installed inter-blade heat shields |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3365173A (en) * | 1966-02-28 | 1968-01-23 | Gen Electric | Stator structure |
| US4987736A (en) * | 1988-12-14 | 1991-01-29 | General Electric Company | Lightweight gas turbine engine frame with free-floating heat shield |
| US5380150A (en) * | 1993-11-08 | 1995-01-10 | United Technologies Corporation | Turbine shroud segment |
| DE19915049A1 (de) * | 1999-04-01 | 2000-10-05 | Abb Alstom Power Ch Ag | Hitzeschild für eine Gasturbine |
| US6290459B1 (en) * | 1999-11-01 | 2001-09-18 | General Electric Company | Stationary flowpath components for gas turbine engines |
| US6502622B2 (en) * | 2001-05-24 | 2003-01-07 | General Electric Company | Casting having an enhanced heat transfer, surface, and mold and pattern for forming same |
| WO2001066914A1 (en) * | 2000-03-07 | 2001-09-13 | Mitsubishi Heavy Industries, Ltd. | Gas turbine split ring |
| JP4698847B2 (ja) * | 2001-01-19 | 2011-06-08 | 三菱重工業株式会社 | ガスタービン分割環 |
| US6779597B2 (en) * | 2002-01-16 | 2004-08-24 | General Electric Company | Multiple impingement cooled structure |
| DE102005013798A1 (de) * | 2005-03-24 | 2006-09-28 | Alstom Technology Ltd. | Wärmestausegment zum Abdichten eines Strömungskanals einer Strömungsrotationsmaschine |
| US8528339B2 (en) * | 2007-04-05 | 2013-09-10 | Siemens Energy, Inc. | Stacked laminate gas turbine component |
-
2008
- 2008-06-23 CA CA2690705A patent/CA2690705C/en not_active Expired - Fee Related
- 2008-06-23 EP EP08761301A patent/EP2173974B1/de active Active
- 2008-06-23 SI SI200830526T patent/SI2173974T1/sl unknown
- 2008-06-23 WO PCT/EP2008/057946 patent/WO2009000801A1/de not_active Ceased
- 2008-06-23 AT AT08761301T patent/ATE530736T1/de active
- 2008-06-27 TW TW097124440A patent/TWI475152B/zh not_active IP Right Cessation
-
2009
- 2009-12-23 US US12/645,880 patent/US8182210B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009000801A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542517A (zh) * | 2020-11-18 | 2022-05-27 | 浙江绍兴苏泊尔生活电器有限公司 | 导风组件及具有其的烹饪器具 |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE530736T1 (de) | 2011-11-15 |
| TW200925389A (en) | 2009-06-16 |
| CA2690705C (en) | 2015-08-04 |
| SI2173974T1 (sl) | 2012-03-30 |
| US20100150712A1 (en) | 2010-06-17 |
| CA2690705A1 (en) | 2008-12-31 |
| US8182210B2 (en) | 2012-05-22 |
| TWI475152B (zh) | 2015-03-01 |
| EP2173974B1 (de) | 2011-10-26 |
| WO2009000801A1 (de) | 2008-12-31 |
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