US20060088409A1 - Grouped reaction nozzle tip shrouds with integrated seals - Google Patents
Grouped reaction nozzle tip shrouds with integrated seals Download PDFInfo
- Publication number
- US20060088409A1 US20060088409A1 US10/968,959 US96895904A US2006088409A1 US 20060088409 A1 US20060088409 A1 US 20060088409A1 US 96895904 A US96895904 A US 96895904A US 2006088409 A1 US2006088409 A1 US 2006088409A1
- Authority
- US
- United States
- Prior art keywords
- seal
- stator vane
- vane segment
- turbine stator
- tip shroud
- 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.)
- Abandoned
Links
- 239000007787 solid Substances 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 description 6
- 238000005219 brazing Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
Images
Classifications
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- 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
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
- F16J15/3288—Filamentary structures, e.g. brush seals
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- 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
- F01D11/001—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between stator blade and rotor
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- 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
- 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
- F05D2240/56—Brush seals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/37—Impeller making apparatus
Definitions
- This invention relates to steam turbines having seals between rotating and non-rotating components, and more particularly, to seal configurations incorporated into integral tip shrouds of grouped stator vanes in a reaction turbine.
- Each stage of a reaction steam turbine includes a plurality of circumferentially spaced buckets mounted on a drum rotor surrounded by a plurality of stationary reaction stator vanes.
- the buckets and nozzles form one stage of the turbine, and define the main steam flow path.
- the buckets are mounted on the periphery of rotor wheels and the nozzle partitions are supported in surrounding diaphragms. It is highly desirable in any case to minimize or eliminate as many steam leakage paths as possible that stem from the main steam flow path.
- One source of leakage in a reaction turbine is a radial gap between grouped sets of reaction stator vanes provided with integral tip shrouds, and opposed radially outer portions of the rotor.
- One known technique for sealing this radial gap involves the utilization of insertable strip seals on the rotor that oppose seal lands on the reaction stator tip shrouds that have been sprayed with an abradable coating.
- Another prior technique involves the incorporation of radially projecting labyrinth teeth at the inner free ends of the nozzle or stator vanes that form labyrinth seals with radially opposed component parts of the turbine rotor. See, for example, commonly owned U.S. Pat. No. 6,786,699.
- the present invention is directed toward novel seal configurations for grouped reaction stator vane segments with integral tip shrouds.
- the exemplary embodiments relate to integrated one-piece stator vane segments incorporating multiple vanes and seal configurations that may include a combination of strip seals, brush seals or integral seal teeth that oppose rotor seal lands in the assembled steam turbine.
- grouped reaction stator vanes with integral tip shrouds refers to a plurality (2 or more, and up to about 50) of reaction turbine stator vanes with integral cover shrouds that have been grouped together by machining as a one-piece or unitary group, where two or more groups make up a 360° ring; or by welding or brazing individual vanes to form a group, where two or more groups also make up a 360° ring.
- a machined one-piece stator vane segment in a first configuration, includes a plurality of vanes, integral tip shroud and integral dovetail (or other mounting configuration).
- the stator tip shroud extends over the plurality of vanes, connecting the tips thereof, and is provided with a generally centered insert.
- the insert includes a brush seal, and the insert is flanked by conventional caulked strip seals upstream and downstream of the brush seal.
- the integral stator tip shroud is provided with a generally axially centered (i.e., in a flow direction) insert having a brush seal with integral machined labyrinth seal teeth located upstream and downstream of the insert.
- stator tip shroud is machined to include a dovetail slot into which a seal strip assembly may be inserted.
- the insertable seal strip assembly is provided with an axially centered brush seal with integral labyrinth seal teeth upstream and downstream of the brush seal.
- the opposed rotor surface may be machined to include a high-low-high land configuration or, a low-high-low land configuration to match a similar seal arrangement in the tip shrouds.
- the specific number of seals, opposed seal lands, and choice of specific seals and/or combination of seals may vary based upon specific application.
- the present invention in its broader aspects relates to a reaction turbine stator vane segment comprising an integral grouping of plural vanes, an arcuate tip shroud connected between radially inner tips of the vanes, and an arcuate mounting portion extending across radially outer tips of the vanes, the arcuate tip shroud formed with plural seal components extending radially inwardly from the tip shroud.
- the invention in another aspect, relates to reaction turbine stator vane segment comprising a unitary machined grouping of plural vanes, an arcuate tip shroud connected between radially inner tips of the vanes, and an arcuate mounting portion extending across radially outer tips of the vanes, the arcuate tip shroud formed with plural seal components extending radially inwardly from the tip shroud, wherein the plural seal components include a brush seal insert received in a groove in the tip shroud, with additional seal components on opposite sides of the brush seal.
- FIG. 1 is a perspective view of a grouped reaction stator vane segment
- FIG. 2 is a partial end elevation of a grouped reaction stator vane segment incorporating a seal configuration in accordance with a first exemplary embodiment of the invention
- FIG. 3 is a partial end elevation of a grouped reaction stator vane segment incorporating a seal configuration in accordance with a second exemplary embodiment of the invention.
- FIG. 4 is a partial end elevation of a grouped reaction stator vane segment incorporating a seal configuration in accordance with a third exemplary embodiment of the invention.
- a grouped reaction stator vane segment 10 includes a plurality of reaction vanes 12 , an integral, arcuate tip shroud 14 at the radially inner ends of the vanes, and a dovetail or other mounting configuration 14 at the radially outer ends of the vanes. While the figure shows a group of four vanes 12 , it is to be understood that the segment may include other numbers of vanes, for example, 6, 8, 12, up to as many as 50 vanes or more, the latter forming a 180° segment. Together, two or more such segments form a closed 360° ring of reaction vanes.
- the segment 14 is machined from a single block of metal material, preferably a stainless steel alloy, but individual vanes may also be grouped by welding, brazing or other suitable means to form a segment.
- a brush seal insert 16 is slidably received within a groove 18 formed in a radially inner face 19 of the tip shroud 14 .
- the insert incorporates brush seal elements 20 that extend radially inward to a location closely adjacent a land 22 on the turbine rotor 24 .
- a pair of strip seals 26 , 28 are seated in respective grooves 30 , 32 in the face 19 of the tip shroud on opposite sides of the brush seal insert, and secured by, for example, peening. These strip seals extend inwardly with the tips closely adjacent respective lands 34 , 36 of the rotor 24 .
- strip seals 26 , 28 lie, respectively, upstream and downstream of the generally axially centered brush seal 16 (relative to the direction of steam flow), in a high-low-high arrangement vis-à-vis the turbine lands. It will be understood that the turbine land configuration could be reversed, with appropriate relocation of seal tips in a low-high-low configuration.
- FIG. 3 illustrates an alternative arrangement in connection with a reaction stator vane segment 38 .
- the tip shroud 40 is fitted with a generally axially centered brush seal insert 42 , seated in a groove 43 formed in the radially inner face 44 of the tip shroud, with brush seal elements 45 similar to the insert 16 in FIG. 2 .
- Labyrinth seal teeth 46 , 48 are formed integrally with the tip shroud 40 and lie upstream and downstream of the brush seal insert 42 , interacting with lands 50 and 52 on the rotor 54 .
- the brush seal elements 44 extend inwardly to a turbine land 56 .
- a high-low-high land configuration is illustrated but, as in the case of FIG. 2 , that configuration may be reversed to a low-high-low arrangement.
- FIG. 4 illustrates yet another embodiment of the invention where the reaction vane segment 58 includes an integrated tip shroud 60 , the radially inner face 61 of which is formed with a dovetail-like groove 62 that receives a seal strip assembly insert 64 .
- the insert 64 is provided with a generally axially centered brush seal 66 having brush seal elements 68 that extend inwardly to a location closely adjacent the turbine land 70 .
- the insert 64 is also formed with integrated upstream and downstream labyrinth seal teeth 72 , 74 which extend radially inwardly to a location closely adjacent respective lands 76 , 78 of the rotor 80 .
- the high-low-high land configuration may be reversed to a low-high-low configuration, with suitable modification of the sealing elements. It will be appreciated that the labyrinth seal teeth 72 , 74 could be replaced with strip seals similar to those in FIG. 2 .
- seal configurations reduce the radial gap between the rotor and the reaction stator vane tip shrouds, and at the same time reduce assembly time for the rotor and eliminate the need for an abradable coating on the reaction stator's integral tip shroud.
- the tip shrouds may incorporate seals and/or seal inserts with any combination of strip seals, brush seals, or labyrinth seal teeth.
Abstract
A reaction turbine stator vane segment comprising an integral grouping of plural vanes, an arcuate tip shroud connected between radially inner tips of the vanes, and an arcuate mounting portion extending across radially outer tips of the vanes, the arcuate tip shroud formed with plural seal components extending radially inwardly from the tip shroud.
Description
- This invention relates to steam turbines having seals between rotating and non-rotating components, and more particularly, to seal configurations incorporated into integral tip shrouds of grouped stator vanes in a reaction turbine.
- Each stage of a reaction steam turbine includes a plurality of circumferentially spaced buckets mounted on a drum rotor surrounded by a plurality of stationary reaction stator vanes. The buckets and nozzles form one stage of the turbine, and define the main steam flow path. By way of contrast, in an impulse turbine, the buckets are mounted on the periphery of rotor wheels and the nozzle partitions are supported in surrounding diaphragms. It is highly desirable in any case to minimize or eliminate as many steam leakage paths as possible that stem from the main steam flow path.
- One source of leakage in a reaction turbine is a radial gap between grouped sets of reaction stator vanes provided with integral tip shrouds, and opposed radially outer portions of the rotor. One known technique for sealing this radial gap involves the utilization of insertable strip seals on the rotor that oppose seal lands on the reaction stator tip shrouds that have been sprayed with an abradable coating. Another prior technique involves the incorporation of radially projecting labyrinth teeth at the inner free ends of the nozzle or stator vanes that form labyrinth seals with radially opposed component parts of the turbine rotor. See, for example, commonly owned U.S. Pat. No. 6,786,699. The combination of labyrinth seal teeth with brush seals has also been utilized at the interface between diaphragm inner webs at the radially inner ends of nozzle partitions and rotor lands in impulse turbines. See, for example, commonly owned U.S. Pat. No. 6,669,443 and commonly owned U.S. Pat. No. 6,290,232.
- There remains a need, however, for effective seal configurations for use with grouped reaction turbine stator vanes having integral tip shrouds that will effectively reduce the radial gap between the tip shrouds and the opposed rotor lands.
- The present invention is directed toward novel seal configurations for grouped reaction stator vane segments with integral tip shrouds. The exemplary embodiments relate to integrated one-piece stator vane segments incorporating multiple vanes and seal configurations that may include a combination of strip seals, brush seals or integral seal teeth that oppose rotor seal lands in the assembled steam turbine.
- For purposes of this invention, the term “grouped reaction stator vanes with integral tip shrouds” refers to a plurality (2 or more, and up to about 50) of reaction turbine stator vanes with integral cover shrouds that have been grouped together by machining as a one-piece or unitary group, where two or more groups make up a 360° ring; or by welding or brazing individual vanes to form a group, where two or more groups also make up a 360° ring.
- In a first configuration, a machined one-piece stator vane segment includes a plurality of vanes, integral tip shroud and integral dovetail (or other mounting configuration). The stator tip shroud extends over the plurality of vanes, connecting the tips thereof, and is provided with a generally centered insert. The insert includes a brush seal, and the insert is flanked by conventional caulked strip seals upstream and downstream of the brush seal. In a second exemplary configuration, the integral stator tip shroud is provided with a generally axially centered (i.e., in a flow direction) insert having a brush seal with integral machined labyrinth seal teeth located upstream and downstream of the insert. In a third configuration, the stator tip shroud is machined to include a dovetail slot into which a seal strip assembly may be inserted. The insertable seal strip assembly is provided with an axially centered brush seal with integral labyrinth seal teeth upstream and downstream of the brush seal.
- For all of the configurations, the opposed rotor surface may be machined to include a high-low-high land configuration or, a low-high-low land configuration to match a similar seal arrangement in the tip shrouds. In addition, the specific number of seals, opposed seal lands, and choice of specific seals and/or combination of seals may vary based upon specific application.
- Accordingly, the present invention in its broader aspects relates to a reaction turbine stator vane segment comprising an integral grouping of plural vanes, an arcuate tip shroud connected between radially inner tips of the vanes, and an arcuate mounting portion extending across radially outer tips of the vanes, the arcuate tip shroud formed with plural seal components extending radially inwardly from the tip shroud.
- In another aspect, the invention relates to reaction turbine stator vane segment comprising a unitary machined grouping of plural vanes, an arcuate tip shroud connected between radially inner tips of the vanes, and an arcuate mounting portion extending across radially outer tips of the vanes, the arcuate tip shroud formed with plural seal components extending radially inwardly from the tip shroud, wherein the plural seal components include a brush seal insert received in a groove in the tip shroud, with additional seal components on opposite sides of the brush seal.
- The invention will now be described in detail in connection with the drawings identified below.
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FIG. 1 is a perspective view of a grouped reaction stator vane segment; -
FIG. 2 is a partial end elevation of a grouped reaction stator vane segment incorporating a seal configuration in accordance with a first exemplary embodiment of the invention; -
FIG. 3 is a partial end elevation of a grouped reaction stator vane segment incorporating a seal configuration in accordance with a second exemplary embodiment of the invention; and -
FIG. 4 is a partial end elevation of a grouped reaction stator vane segment incorporating a seal configuration in accordance with a third exemplary embodiment of the invention. - With reference to
FIG. 1 , a grouped reactionstator vane segment 10 includes a plurality ofreaction vanes 12, an integral,arcuate tip shroud 14 at the radially inner ends of the vanes, and a dovetail orother mounting configuration 14 at the radially outer ends of the vanes. While the figure shows a group of fourvanes 12, it is to be understood that the segment may include other numbers of vanes, for example, 6, 8, 12, up to as many as 50 vanes or more, the latter forming a 180° segment. Together, two or more such segments form a closed 360° ring of reaction vanes. - In the preferred arrangement, the
segment 14 is machined from a single block of metal material, preferably a stainless steel alloy, but individual vanes may also be grouped by welding, brazing or other suitable means to form a segment. - Turning now to
FIG. 2 , thesegment 10 and, specifically, thetip shroud 14 is provided with a combined strip and brush seal arrangement. Specifically, abrush seal insert 16 is slidably received within agroove 18 formed in a radiallyinner face 19 of thetip shroud 14. The insert incorporatesbrush seal elements 20 that extend radially inward to a location closely adjacent aland 22 on theturbine rotor 24. A pair ofstrip seals respective grooves face 19 of the tip shroud on opposite sides of the brush seal insert, and secured by, for example, peening. These strip seals extend inwardly with the tips closely adjacentrespective lands rotor 24. Note that the strip seals 26, 28 lie, respectively, upstream and downstream of the generally axially centered brush seal 16 (relative to the direction of steam flow), in a high-low-high arrangement vis-à-vis the turbine lands. It will be understood that the turbine land configuration could be reversed, with appropriate relocation of seal tips in a low-high-low configuration. -
FIG. 3 illustrates an alternative arrangement in connection with a reactionstator vane segment 38. In this embodiment, thetip shroud 40 is fitted with a generally axially centeredbrush seal insert 42, seated in agroove 43 formed in the radiallyinner face 44 of the tip shroud, withbrush seal elements 45 similar to theinsert 16 inFIG. 2 .Labyrinth seal teeth tip shroud 40 and lie upstream and downstream of thebrush seal insert 42, interacting withlands rotor 54. Thebrush seal elements 44 extend inwardly to aturbine land 56. Here again, a high-low-high land configuration is illustrated but, as in the case ofFIG. 2 , that configuration may be reversed to a low-high-low arrangement. -
FIG. 4 illustrates yet another embodiment of the invention where thereaction vane segment 58 includes an integratedtip shroud 60, the radiallyinner face 61 of which is formed with a dovetail-like groove 62 that receives a sealstrip assembly insert 64. Theinsert 64 is provided with a generally axiallycentered brush seal 66 havingbrush seal elements 68 that extend inwardly to a location closely adjacent theturbine land 70. Theinsert 64 is also formed with integrated upstream and downstreamlabyrinth seal teeth respective lands rotor 80. As in the prior embodiments, the high-low-high land configuration may be reversed to a low-high-low configuration, with suitable modification of the sealing elements. It will be appreciated that thelabyrinth seal teeth FIG. 2 . - The above-described seal configurations reduce the radial gap between the rotor and the reaction stator vane tip shrouds, and at the same time reduce assembly time for the rotor and eliminate the need for an abradable coating on the reaction stator's integral tip shroud. It will be appreciated that the tip shrouds may incorporate seals and/or seal inserts with any combination of strip seals, brush seals, or labyrinth seal teeth.
- While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (15)
1. A reaction turbine stator vane segment comprising an integral grouping of plural vanes, an arcuate tip shroud connected between radially inner tips of the vanes, and an arcuate mounting portion extending across radially outer tips of the vanes, said arcuate tip shroud formed with plural seal components extending radially inwardly from said tip shroud.
2. The reaction turbine stator vane segment of claim 1 wherein said plural seal components include a combination of strip seals and brush seals.
3. The reaction turbine stator vane segment of claim 1 wherein said plural seal components include a combination of labyrinth seal teeth and brush seals.
4. The reaction turbine stator vane segment of claim 1 wherein said plural seal components include a pair of strip seals, one on either side of a brush seal.
5. The reaction turbine stator vane segment of claim 1 wherein said plural seal components include a pair of labyrinth seal teeth, one on either side of a brush seal.
6. The reaction turbine stator vane segment of claim 1 wherein said plural seal components are mounted in an arcuate insert and said arcuate insert is received within a groove in said tip shroud.
7. The reaction turbine stator vane segment of claim 6 wherein said plural seal components include a brush seal flanked by a pair of labyrinth seal teeth.
8. The reaction turbine stator vane segment of claim 1 wherein said integral grouping is machined from a single solid block.
9. The reaction turbine stator vane segment of claim 1 wherein said plural seal components include a brush seal insert received in a groove in said tip shroud, with additional seal components on opposite sides of said brush seal insert.
10. The reaction turbine stator vane segment of claim 9 wherein said additional seal components comprise strip seals.
11. The reaction turbine stator vane segment of claim 9 wherein said additional seal components comprise labyrinth seal teeth.
12. A reaction turbine stator vane segment comprising a unitary machined grouping of plural vanes, an arcuate tip shroud connected between radially inner tips of the vanes, and an arcuate mounting portion extending across radially outer tips of the vanes, said arcuate tip shroud formed with plural seal components extending radially inwardly from said tip shroud, wherein said plural seal components include a brush seal insert received in a groove in said tip shroud, with additional seal components on opposite sides of said brush seal.
13. The reaction turbine stator vane segment of claim 12 wherein said additional seal components comprise strip seals mounted in a radially inner face of the tip shroud.
14. The reaction turbine stator vane segment of claim 12 wherein said additional seal components comprise labyrinth seal teeth integrally formed with a radially inner face of the tip shroud.
15. The reaction turbine stator vane segment of claim 12 wherein said additional seal components are mounted in said brush seal insert.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/968,959 US20060088409A1 (en) | 2004-10-21 | 2004-10-21 | Grouped reaction nozzle tip shrouds with integrated seals |
FR0509942A FR2877035A1 (en) | 2004-10-21 | 2005-09-29 | GROUP REACTION NOZZLE BANDAGES WITH INTEGRATED SEAL SEALS. |
CH01687/05A CH698121B1 (en) | 2004-10-21 | 2005-10-20 | Grouped reaction nozzle shrouds with integrated seals. |
CN200510116490.2A CN1807846A (en) | 2004-10-21 | 2005-10-21 | Grouped reaction nozzle tip shrouds with integrated seals |
US11/727,442 US20070245532A1 (en) | 2004-10-21 | 2007-03-27 | Grouped reaction nozzle tip shrouds with integrated seals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US10/968,959 US20060088409A1 (en) | 2004-10-21 | 2004-10-21 | Grouped reaction nozzle tip shrouds with integrated seals |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/727,442 Continuation US20070245532A1 (en) | 2004-10-21 | 2007-03-27 | Grouped reaction nozzle tip shrouds with integrated seals |
Publications (1)
Publication Number | Publication Date |
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US20060088409A1 true US20060088409A1 (en) | 2006-04-27 |
Family
ID=36143517
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US10/968,959 Abandoned US20060088409A1 (en) | 2004-10-21 | 2004-10-21 | Grouped reaction nozzle tip shrouds with integrated seals |
US11/727,442 Abandoned US20070245532A1 (en) | 2004-10-21 | 2007-03-27 | Grouped reaction nozzle tip shrouds with integrated seals |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US11/727,442 Abandoned US20070245532A1 (en) | 2004-10-21 | 2007-03-27 | Grouped reaction nozzle tip shrouds with integrated seals |
Country Status (4)
Country | Link |
---|---|
US (2) | US20060088409A1 (en) |
CN (1) | CN1807846A (en) |
CH (1) | CH698121B1 (en) |
FR (1) | FR2877035A1 (en) |
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US20090067978A1 (en) * | 2007-05-24 | 2009-03-12 | Suljak Jr George T | Variable area turbine vane arrangement |
US20120195741A1 (en) * | 2011-01-31 | 2012-08-02 | General Electric Company | Axial brush seal |
US8392981B2 (en) | 2007-05-09 | 2013-03-05 | Microsoft Corporation | Software firewall control |
CN108679227A (en) * | 2018-05-24 | 2018-10-19 | 西安交通大学 | A kind of high pressure resistant low sluggish brush seal structure of the front apron with nozzle |
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DE102007018063A1 (en) * | 2007-04-17 | 2008-10-23 | Siemens Ag | Impulse turbine |
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DE102007018063B4 (en) * | 2007-04-17 | 2012-02-09 | Siemens Ag | Impulse turbine |
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US20120195741A1 (en) * | 2011-01-31 | 2012-08-02 | General Electric Company | Axial brush seal |
US8777563B2 (en) * | 2011-01-31 | 2014-07-15 | General Electric Company | Axial brush seal |
CN108679227A (en) * | 2018-05-24 | 2018-10-19 | 西安交通大学 | A kind of high pressure resistant low sluggish brush seal structure of the front apron with nozzle |
CN113339323A (en) * | 2021-07-07 | 2021-09-03 | 大连海事大学 | Gas compressor inlet guide vane structure with brush seal |
CN114483211A (en) * | 2022-03-03 | 2022-05-13 | 南京航空航天大学 | Sealing device for reducing gap leakage |
Also Published As
Publication number | Publication date |
---|---|
FR2877035A1 (en) | 2006-04-28 |
CN1807846A (en) | 2006-07-26 |
CH698121B1 (en) | 2009-05-29 |
US20070245532A1 (en) | 2007-10-25 |
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