US20140290269A1 - Duct blocker seal assembly for a gas turbine engine - Google Patents
Duct blocker seal assembly for a gas turbine engine Download PDFInfo
- Publication number
- US20140290269A1 US20140290269A1 US14/150,411 US201414150411A US2014290269A1 US 20140290269 A1 US20140290269 A1 US 20140290269A1 US 201414150411 A US201414150411 A US 201414150411A US 2014290269 A1 US2014290269 A1 US 2014290269A1
- Authority
- US
- United States
- Prior art keywords
- seal
- gas turbine
- turbine engine
- blocker ring
- cover plate
- 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
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/28—Arrangement of seals
-
- 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
- F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K3/00—Plants including a gas turbine driving a compressor or a ducted fan
- F02K3/02—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber
- F02K3/04—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type
- F02K3/075—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type controlling flow ratio between flows
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0207—Surge control by bleeding, bypassing or recycling fluids
- F04D27/0215—Arrangements therefor, e.g. bleed or by-pass valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/083—Sealings especially adapted for elastic fluid pumps
-
- 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
- F05D2220/90—Application in vehicles adapted for vertical or short take off and landing (v/stol vehicles)
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Definitions
- the present disclosure relates to gas turbine engines, and more particularly to a duct blocker system therefore.
- Gas turbine engines such as those which power modern military aircraft, include a compressor section to pressurize a supply of air, a combustor section to burn a hydrocarbon fuel in the presence of the pressurized air, and a turbine section to extract energy from the resultant combustion gases and generate thrust. Downstream of the turbine section, an augmentor section, or “afterburner”, is operable to selectively increase the thrust. The increase in thrust is produced when fuel is injected into the core exhaust gases downstream of the turbine section and burned with the oxygen contained therein to generate a second combustion.
- Certain engine architectures advantageously modulate airflow with a blocker system to facilitate V/STOL operations and/or selectively control third stream airflow in a variable cycle engine architecture.
- a gas turbine engine includes an outer case; a blocker ring mounted within the outer case; a tab that extends from the blocker ring through the outer case; a cover plate mountable to the outer case to surround the tab; a first support adjacent the cover plate; an outer compliant seal supported by the first support to seal with the cover plate; a second support at least partially supported by the first support; an inner compliant seal supported by the second support to seal with the blocker ring; and a spring between the second support and the first support.
- a further embodiment of the present disclosure includes, wherein the outer case is manufactured of a first material and the blocker ring is manufactured of a second material, the first material different than the second material.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the tab extends through a slot in the cover plate.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes a stationary blocker ring mounted to the outer case, the blocker ring movable relative to the stationary fan duct blocker ring.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes an actuator mounted to the outer case, the actuator engaged with the tab.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the blocker ring is mounted within a fan duct.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the outer duct at least partially defines a turbine exhaust case.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the turbine exhaust case at least partially defines an augmentor section of the gas turbine engine.
- a gas turbine engine includes an outer case; a blocker ring mounted within the outer case; a tab that extends from the blocker ring through the outer case; a cover plate mountable to the outer case to surround the tab, the cover plate defines a radial flange; a seal carrier adjacent the cover plate; an outer compliant seal supported by the seal carrier, the outer compliant seal engaged with the outer case; an inner compliant seal supported by the seal carrier, the inner compliant seal engaged with the radial flange; and a spring between the cover plate and the seal carrier.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the outer case is manufactured of a first material and the blocker ring is manufactured of a second material, the first material different than the second material.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the tab extends through a slot in the cover plate.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes a stationary blocker ring mounted to the outer case, the blocker ring movable relative to the stationary fan duct blocker ring.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes an actuator mounted to the outer case, the actuator engaged with the tab.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the blocker ring is mounted within a fan duct.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the outer duct at least partially defines a turbine exhaust case.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the turbine exhaust case at least partially defines an augmentor section of the gas turbine engine.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the seal carrier defines a sliding surface that slides upon the blocker ring.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the sliding surface is non-linear.
- a seal system for a gas turbine engine includes a cover plate with a radial flange; a seal carrier adjacent the cover plate; an outer compliant seal supported by the seal carrier; an inner compliant seal supported by the seal carrier, the inner compliant seal engaged with the radial flange; and a spring between the cover plate and the seal carrier.
- a further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the radial flange is racetrack shaped.
- FIG. 1 is a general schematic, cross-sectional view of an exemplary gas turbine engine embodiment for use with the present disclosure
- FIG. 2 is a partial sectional isometric view of a duct blocker system
- FIG. 3 is an expanded sectional view of the duct blocker system
- FIG. 4 is a general schematic isometric view of an exemplary gas turbine engine embodiment for use with the present disclosure
- FIG. 5 is an exploded view of the duct blocker system
- FIG. 6 is a perspective end view of the duct blocker system
- FIG. 7 is an expanded partial perspective sectional view of a seal system for the duct blocker system according to one disclosed non-limiting embodiment
- FIG. 8 is an expanded sectional view of the seal system of FIG. 7 ;
- FIG. 9 is an expanded sectional view of a seal system for the duct blocker system according to another disclosed non-limiting embodiment.
- FIG. 10 is an expanded perspective view of a compliant seal of the seal system of FIG. 9 ;
- FIG. 11 is an expanded sectional view of the compliant seal of FIG. 10 ;
- FIG. 12 is an expanded partial perspective sectional view of a seal system for the duct blocker system according to another disclosed non-limiting embodiment
- FIG. 13 is an expanded partial perspective sectional view of a seal system for the duct blocker system according to another disclosed non-limiting embodiment
- FIG. 14 is an expanded sectional view of a seal system for the duct blocker system according to another disclosed non-limiting embodiment
- FIG. 15 is an expanded sectional view of a seal system for the duct blocker system according to another disclosed non-limiting embodiment.
- FIG. 16 is an expanded sectional view of a seal system for the duct blocker system according to another disclosed non-limiting embodiment.
- FIG. 1 schematically illustrates a gas turbine engine 20 .
- the gas turbine engine 20 generally incorporates a fan section 22 , a compressor section 24 , a combustor section 26 , a turbine section 28 , an augmenter section 30 and an exhaust duct section 32 .
- a fan section 22 generally incorporates a fan section 22 , a compressor section 24 , a combustor section 26 , a turbine section 28 , an augmenter section 30 and an exhaust duct section 32 .
- augmenter section 30 depicted as an augmented low bypass gas turbine engine in the disclosed non-limiting embodiment, it should be understood that the concepts described herein are applicable to other gas turbine engines including geared architecture engines, direct drive turbofans, turbojet, turboshaft, ramjet and other engine architectures.
- the compressor section 24 , the combustor section 26 and the turbine section 28 are generally referred to as the engine core defined along a central longitudinal engine axis A.
- the fan section 22 and a low pressure turbine 34 of the turbine section 28 are coupled by a first shaft 36 to define a low spool.
- the compressor section 24 and a high pressure turbine 38 of the turbine section 28 are coupled by a second shaft 40 to define a high spool.
- An outer engine structure 42 and an inner engine structure 44 define a generally annular secondary airflow path 46 around a primary airflow path 48 of the engine core. It should be understood that various structure within the engine may define the outer engine structure 42 and the inner engine structure 44 which essentially define an exoskeleton to support the rotating hardware therein.
- Air that enters the fan section 22 is divided between a core flow through the primary airflow path 48 and a secondary airflow through the secondary airflow path 46 .
- the core flow passes through the combustor section 26 , the turbine section 28 , then the augmentor section 30 where fuel may be selectively injected and burned to generate additional thrust through the exhaust duct section 32 .
- the secondary airflow may be utilized for a multiple of purposes to include, for example, cooling and pressurization.
- the secondary airflow as defined herein is any airflow different than the primary combustion gas exhaust airflow.
- the secondary airflow passes through an annulus defined by the outer engine case structure 42 and the inner engine structure 44 then may be at least partially injected into the primary airflow path 48 adjacent the augmentor section 30 and the exhaust duct 32 .
- the augmenter section 30 generally includes an outer case 70 , a turbine exhaust case (TEC) 50 , and a center body 52 with a conically shaped tail cone 54 .
- the outer case 70 of the outer engine case structure 42 has a concentrically spaced inner liner 72 that operates as a heat shield to protect said outer case 70 from the exhaust gas flow in the flow path. Airflow from, for example, the fan section 22 may be communicated through the secondary airflow path 46 defined in part by the outer case 70 and the inner liner 72 .
- a duct blocker system 80 may be located between the outer case 70 and the TEC 50 to modulate the secondary airflow path 46 from, for example the fan section 22 . It should be appreciated that the duct blocker system 80 may be located in other locations in other engine architectures.
- the duct blocker system 80 rotates a forward blocker ring 82 relative a rotationally fixed aft blocker ring 84 to define a variable area throat through alignment or offset of a multiple of airfoils (also shown in FIG. 3 ) to selectively modulate fan airflow into, for example, a set of roll control ducts B ( FIG. 4 ) to facilitate V/STOL operations. It should be appreciated that various other usages such as selectively control of airflow through a third stream airflow path of a variable cycle engine architecture will also benefit herefrom.
- the duct blocker system 80 generally includes the forward blocker ring 82 , the rotationally fixed aft blocker ring 84 , an actuator 86 , and a sealing system 90 .
- the sealing system 90 is positioned between the outer case 70 and the forward blocker ring 82 to maintain air pressure overboard.
- a blocker ring tab 92 attached to the forward blocker ring 82 protrudes through the outer case 70 and cover plate 88 to permit rotation of the forward blocker ring 82 via the actuator 86 ( FIG. 6 ).
- the sealing system 90 seals air pressure as well as accommodate relatively large radial deflections in a confined axial space due to differences in thermal growth between the outer case 70 and the forward blocker ring 82 .
- the sealing system 90 accommodates significant radial displacement as the outer case 70 may be manufactured of one material such as an organic matrix composite material while the forward blocker ring 82 may be manufactured of another material such as titanium, each of which has significantly different coefficients of thermal expansion.
- the sealing system 90 also withstands relatively high temperatures and high operational pressures.
- the sealing system 90 also accommodates dynamic rotational movements and relatively small “dither” movements from the actuator 86 .
- the sealing system 90 may be of an annular racetrack shape to comply with the design space. It should be understood that other annular shapes such as rectilinear and others will also benefit herefrom.
- the sealing system 90 - 1 in one disclosed non-limiting embodiment generally includes a seal carrier 94 - 1 and a compliant seal 96 - 1 that are of a racetrack shape to seal a slot-shaped opening 89 in the cover plate 88 .
- the seal carrier 94 - 1 may be manufactured of a rigid material such as a metal alloy to provide axial support to the compliant seal 96 - 1 and limit contact with the blocker ring tab 92 .
- the seal carrier 94 - 1 also reduces the sealed gap, which reduces the possibility of extrusion of the compliant seal 96 - 1 .
- the seal carrier 94 - 1 may provide a machined radius on an inboard surface 98 and an outboard surface 100 to closely fit the forward blocker ring 82 and provide mistake-proof installation. Alternatively, the seal carrier 94 - 1 is machined only on the inboard surface 98 to increase stiffness and reduce the extrusion gap.
- the compliant seal 96 - 1 may be manufactured of a compliant material and define an “E” shape in cross-section.
- Each leg 102 of the compliant seal 96 - 1 may include a distal end 104 that is thicker than the leg 102 to facilitate a seal interface with the outer case 70 , the cover plate 88 and the forward blocker ring 82 . It should be understood that other cross-sectional shapes for the distal ends 104 may alternatively be provided.
- a sealing system 90 - 2 in another disclosed non-limiting embodiment generally includes a seal carrier 94 - 2 and a compliant seal 96 - 2 .
- the seal carrier 94 - 2 includes an alignment rib 106 that interfaces with a slot 108 in the compliant seal 96 - 2 ( FIGS. 10 and 11 ).
- the alignment rib 106 is located about an outer periphery 110 of the seal carrier 94 - 2 and the slot 108 is located about an inner periphery 112 of the compliant seal 96 - 2 .
- the slot 108 is located opposite the central leg 102 .
- Each leg 102 of the compliant seal 96 - 2 includes a distal end 104 that is thicker than the leg 102 . In this disclosed non-limited embodiment the distal end 104 is triangular shaped.
- the alignment rib 106 can take the shape of a square, rectangle, triangle, oval, circle, I-Beam, polygon, or any other geometry.
- the alignment rib 106 provides a stiffness increase that resists collapse of the compliant seal 96 - 2 under pressure into the actuation blocker ring tab 92 to facilitate a more compact design.
- the alignment rib 106 also positions and maintains the compliant seal 96 - 2 within the rigid seal carrier 94 - 2 to facilitate assembly.
- a sealing system 90 - 3 in another disclosed non-limiting embodiment generally includes a cover plate 88 - 3 with a cover plate radial flange 114 .
- the cover plate radial flange 114 supports and positions the compliant seal 96 - 3 as well as eliminates the separate seal carrier as describe above.
- the stiffness of the cover plate radial flange 114 limits deflections of the compliant seal 96 - 3 when pressurized as well as provides a close interface with the blocker ring tab 92 .
- the compliant seal 96 - 3 may be installed onto the cover plate radial flange 114 to facilitate assembly and protect the compliant seal 96 - 3 from the blocker ring tab 92 .
- This configuration eliminates any seal gap on the cover plate side.
- the cover plate radial flange 114 extends radially generally parallel to the blocker ring tab 92 for a distance to accommodate the full thermal expansion (radial) movement of the forward blocker ring 82 .
- the cover plate radial flange 114 also defines an inner surface contour 115 that matches the radius of the forward blocker ring 82 . That is, the inner surface contour 115 may be non-linear.
- the cover plate radial flange 114 beneficially facilitates a proper seal of the design space and prevents undesirable axial deflection into the blocker ring tab 92 during engine operation.
- the cover plate radial flange 114 also facilitates a reduction in the sealed gap which thereby decreases the possibility of seal extrusion which may otherwise contribute to the reduced service life.
- a sealing system 90 - 4 in another disclosed non-limiting embodiment generally includes a seal carrier 94 - 4 with a seal carrier flange 116 .
- the seal carrier flange 116 supports and positions the compliant seal 96 - 4 .
- the seal carrier flange 116 extends generally conformal with the forward blocker ring 82 a close interface therewith. That is, the seal carrier flange 116 is non-linear and follows the radius of the forward blocker ring 82 .
- the seal carrier 94 - 4 forms a telescoping space 118 to encase the compliant seal 96 - 4 . Any radial extrusion gap common to O-ring type designs is thereby reduced to a single axial gap.
- the seal carrier 94 - 4 positions the compliant seal 96 - 4 within the outer case 70 and is dimensioned such that the seal carrier 94 - 4 will maintain contact with the outer case 70 and cover plate 88 while limiting deflection of the compliant seal 96 - 4 . This eliminates the sliding of the compliant seal 96 - 4 during rotation of the forward blocker ring 82 and provides a sliding interface with the seal carrier 94 - 4 rather than the compliant seal 96 - 4 .
- a sliding surface 120 on the seal carrier 94 - 4 may alternatively be lined with a low friction wear resistant material such as Teflon.
- the seal carrier 94 - 4 facilitates proper sealing of the design space.
- the seal carrier 94 - 4 may be manufactured of the same material as the forward blocker ring 82 .
- the seal carrier 94 - 4 readily accommodates the radial deflections due to thermal growth between the outer case 70 and forward blocker ring 82 by allowing the seal carrier 94 - 4 to extend radially outward through the cover plate 88 . This provides a design space operable to meet full compression due to thermal growth.
- the gap is also reconfigured from a radial gap to an axial gap.
- the seal carrier 94 - 4 protects the compliant seal 96 - 4 from contact with the blocker ring tab 92 .
- the seal carrier 94 - 4 also beneficially provides a static surface for the compliant seal 96 - 4 and moves the sliding surface and wear potential to the seal carrier 94 - 4 .
- a sealing system 90 - 5 in another disclosed non-limiting embodiment generally includes a first support ring 122 , a second support ring 124 , a spring 126 , an outer compliant seal 128 and an inner compliant seal 130 .
- the first support ring 122 and the second support ring 124 respectively support the outer compliant seal 128 and the inner compliant seal 130 .
- the spring 126 biases the first support ring 122 away from the second support ring 124 such that the outer compliant seal 128 seals with the cover plate 88 and the inner compliant seal 130 seals with the forward blocker ring 82 .
- the spring 126 may be located within a first recess 131 in the first support ring 122 and a second recess 133 in the second support ring 124 .
- the first support ring 122 is also at least partially received within the second recess 133 to provide stability therebetween as the first support ring 122 telescopes with respect to the second support ring 124 .
- the first support ring 122 and the second support ring 124 may be manufactured of metal alloy and provide a relatively significant axial stiffness to prevent deflections under pressure and eliminate contact with the blocker ring tab 92 .
- the telescoping interface eliminates the possibility of seal extrusion which may otherwise contribute to reduced service life.
- the essentially all-metal alloy sealing system 90 - 5 also facilities operation at elevated temperatures.
- a sealing system 90 - 6 in another disclosed non-limiting embodiment generally includes a seal carrier 94 - 6 and a “W” seal 134 .
- the seal carrier 94 - 6 rides on the forward blocker ring 82 and the “W” seal 134 maintains the seal carrier 94 - 6 in contact with the forward blocker ring 82 throughout the thermal growth range.
- a sliding surface 135 on the seal carrier 94 - 6 may also be lined with a low friction wear resistant material.
- the seal carrier 94 - 6 and the “W” seal 134 may be manufactured of a metal alloy to facilitate an effective seal of the design space as well as provide stiffness to the sealing system 90 - 6 to prevent axial deflections under pressure and potential contact with the blocker ring tab 92 .
- the metal alloy “W” seal 134 eliminates the compliant seal and thereby the possibility of seal extrusion which may otherwise contribute to reduced service life.
- the essentially all-metal alloy sealing system 90 - 6 also facilities operation at elevated temperatures.
- a sealing system 90 - 7 in another disclosed non-limiting embodiment generally includes a cover plate 88 - 7 with a radial flange 136 , a seal carrier 138 , a spring system 140 , a compliant inner seal 142 and a compliant outer seal 144 .
- the radial flange 136 surrounds the blocker ring tab 92 and extends into the outer case 70 toward the forward blocker ring 82 .
- the seal carrier 138 rides on the forward blocker ring 82 and the spring 140 maintains the seal carrier 138 in contact with the forward blocker ring 82 throughout the thermal growth range.
- a sliding surface 146 on the seal carrier 138 may also be lined with a low friction wear resistant material.
- the inner seal 142 and the outer seal 144 extend axially from the seal carrier 138 to respectively seal with the radial flange 136 and the outer case 70 .
- the metal alloy seal carrier 138 eliminates the possibility of seal extrusion which may otherwise contribute to reduced service life.
- the essentially all-metal alloy sealing system 90 - 7 also facilities operation at elevated temperatures.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Gasket Seals (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
- This application claims priority to U.S. Patent Appln. No. 61/775,211 filed Mar. 8, 2013.
- This disclosure was made with Government support under N00019-02-C-3003 awarded by The United States Navy. The Government has certain rights in this disclosure.
- The present disclosure relates to gas turbine engines, and more particularly to a duct blocker system therefore.
- Gas turbine engines, such as those which power modern military aircraft, include a compressor section to pressurize a supply of air, a combustor section to burn a hydrocarbon fuel in the presence of the pressurized air, and a turbine section to extract energy from the resultant combustion gases and generate thrust. Downstream of the turbine section, an augmentor section, or “afterburner”, is operable to selectively increase the thrust. The increase in thrust is produced when fuel is injected into the core exhaust gases downstream of the turbine section and burned with the oxygen contained therein to generate a second combustion.
- Certain engine architectures advantageously modulate airflow with a blocker system to facilitate V/STOL operations and/or selectively control third stream airflow in a variable cycle engine architecture.
- A gas turbine engine according to one disclosed non-limiting embodiment of the present disclosure includes an outer case; a blocker ring mounted within the outer case; a tab that extends from the blocker ring through the outer case; a cover plate mountable to the outer case to surround the tab; a first support adjacent the cover plate; an outer compliant seal supported by the first support to seal with the cover plate; a second support at least partially supported by the first support; an inner compliant seal supported by the second support to seal with the blocker ring; and a spring between the second support and the first support.
- A further embodiment of the present disclosure includes, wherein the outer case is manufactured of a first material and the blocker ring is manufactured of a second material, the first material different than the second material.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the tab extends through a slot in the cover plate.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes a stationary blocker ring mounted to the outer case, the blocker ring movable relative to the stationary fan duct blocker ring.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes an actuator mounted to the outer case, the actuator engaged with the tab.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the blocker ring is mounted within a fan duct.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the outer duct at least partially defines a turbine exhaust case.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the turbine exhaust case at least partially defines an augmentor section of the gas turbine engine.
- A gas turbine engine according to another disclosed non-limiting embodiment of the present disclosure includes an outer case; a blocker ring mounted within the outer case; a tab that extends from the blocker ring through the outer case; a cover plate mountable to the outer case to surround the tab, the cover plate defines a radial flange; a seal carrier adjacent the cover plate; an outer compliant seal supported by the seal carrier, the outer compliant seal engaged with the outer case; an inner compliant seal supported by the seal carrier, the inner compliant seal engaged with the radial flange; and a spring between the cover plate and the seal carrier.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the outer case is manufactured of a first material and the blocker ring is manufactured of a second material, the first material different than the second material.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the tab extends through a slot in the cover plate.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes a stationary blocker ring mounted to the outer case, the blocker ring movable relative to the stationary fan duct blocker ring.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes an actuator mounted to the outer case, the actuator engaged with the tab.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the blocker ring is mounted within a fan duct.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the outer duct at least partially defines a turbine exhaust case.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the turbine exhaust case at least partially defines an augmentor section of the gas turbine engine.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the seal carrier defines a sliding surface that slides upon the blocker ring.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the sliding surface is non-linear.
- A seal system for a gas turbine engine according to another disclosed non-limiting embodiment of the present disclosure includes a cover plate with a radial flange; a seal carrier adjacent the cover plate; an outer compliant seal supported by the seal carrier; an inner compliant seal supported by the seal carrier, the inner compliant seal engaged with the radial flange; and a spring between the cover plate and the seal carrier.
- A further embodiment of any of the foregoing embodiments of the present disclosure includes, wherein the radial flange is racetrack shaped.
- Various features will become apparent to those skilled in the art from the following detailed description of the disclosed non-limiting embodiment. The drawings that accompany the detailed description can be briefly described as follows:
-
FIG. 1 is a general schematic, cross-sectional view of an exemplary gas turbine engine embodiment for use with the present disclosure; -
FIG. 2 is a partial sectional isometric view of a duct blocker system; -
FIG. 3 is an expanded sectional view of the duct blocker system; -
FIG. 4 is a general schematic isometric view of an exemplary gas turbine engine embodiment for use with the present disclosure; -
FIG. 5 is an exploded view of the duct blocker system; -
FIG. 6 is a perspective end view of the duct blocker system; -
FIG. 7 is an expanded partial perspective sectional view of a seal system for the duct blocker system according to one disclosed non-limiting embodiment; -
FIG. 8 is an expanded sectional view of the seal system ofFIG. 7 ; -
FIG. 9 is an expanded sectional view of a seal system for the duct blocker system according to another disclosed non-limiting embodiment; -
FIG. 10 is an expanded perspective view of a compliant seal of the seal system ofFIG. 9 ; -
FIG. 11 is an expanded sectional view of the compliant seal ofFIG. 10 ; -
FIG. 12 is an expanded partial perspective sectional view of a seal system for the duct blocker system according to another disclosed non-limiting embodiment; -
FIG. 13 is an expanded partial perspective sectional view of a seal system for the duct blocker system according to another disclosed non-limiting embodiment; -
FIG. 14 is an expanded sectional view of a seal system for the duct blocker system according to another disclosed non-limiting embodiment; -
FIG. 15 is an expanded sectional view of a seal system for the duct blocker system according to another disclosed non-limiting embodiment; and -
FIG. 16 is an expanded sectional view of a seal system for the duct blocker system according to another disclosed non-limiting embodiment. -
FIG. 1 schematically illustrates agas turbine engine 20. Thegas turbine engine 20 generally incorporates afan section 22, acompressor section 24, acombustor section 26, aturbine section 28, anaugmenter section 30 and anexhaust duct section 32. Although depicted as an augmented low bypass gas turbine engine in the disclosed non-limiting embodiment, it should be understood that the concepts described herein are applicable to other gas turbine engines including geared architecture engines, direct drive turbofans, turbojet, turboshaft, ramjet and other engine architectures. - The
compressor section 24, thecombustor section 26 and theturbine section 28 are generally referred to as the engine core defined along a central longitudinal engine axis A. Thefan section 22 and alow pressure turbine 34 of theturbine section 28 are coupled by afirst shaft 36 to define a low spool. Thecompressor section 24 and ahigh pressure turbine 38 of theturbine section 28 are coupled by asecond shaft 40 to define a high spool. - An
outer engine structure 42 and aninner engine structure 44 define a generally annularsecondary airflow path 46 around aprimary airflow path 48 of the engine core. It should be understood that various structure within the engine may define theouter engine structure 42 and theinner engine structure 44 which essentially define an exoskeleton to support the rotating hardware therein. - Air that enters the
fan section 22 is divided between a core flow through theprimary airflow path 48 and a secondary airflow through thesecondary airflow path 46. The core flow passes through thecombustor section 26, theturbine section 28, then theaugmentor section 30 where fuel may be selectively injected and burned to generate additional thrust through theexhaust duct section 32. The secondary airflow may be utilized for a multiple of purposes to include, for example, cooling and pressurization. The secondary airflow as defined herein is any airflow different than the primary combustion gas exhaust airflow. The secondary airflow passes through an annulus defined by the outerengine case structure 42 and theinner engine structure 44 then may be at least partially injected into theprimary airflow path 48 adjacent theaugmentor section 30 and theexhaust duct 32. - The
augmenter section 30 generally includes anouter case 70, a turbine exhaust case (TEC) 50, and acenter body 52 with a conically shapedtail cone 54. Theouter case 70 of the outerengine case structure 42 has a concentrically spacedinner liner 72 that operates as a heat shield to protect saidouter case 70 from the exhaust gas flow in the flow path. Airflow from, for example, thefan section 22 may be communicated through thesecondary airflow path 46 defined in part by theouter case 70 and theinner liner 72. - With reference to
FIG. 2 , aduct blocker system 80 may be located between theouter case 70 and theTEC 50 to modulate thesecondary airflow path 46 from, for example thefan section 22. It should be appreciated that theduct blocker system 80 may be located in other locations in other engine architectures. Theduct blocker system 80 rotates aforward blocker ring 82 relative a rotationally fixedaft blocker ring 84 to define a variable area throat through alignment or offset of a multiple of airfoils (also shown inFIG. 3 ) to selectively modulate fan airflow into, for example, a set of roll control ducts B (FIG. 4 ) to facilitate V/STOL operations. It should be appreciated that various other usages such as selectively control of airflow through a third stream airflow path of a variable cycle engine architecture will also benefit herefrom. - With reference to
FIG. 5 , theduct blocker system 80 generally includes theforward blocker ring 82, the rotationally fixedaft blocker ring 84, anactuator 86, and asealing system 90. The sealingsystem 90 is positioned between theouter case 70 and theforward blocker ring 82 to maintain air pressure overboard. Ablocker ring tab 92 attached to theforward blocker ring 82 protrudes through theouter case 70 andcover plate 88 to permit rotation of theforward blocker ring 82 via the actuator 86 (FIG. 6 ). - The sealing
system 90 seals air pressure as well as accommodate relatively large radial deflections in a confined axial space due to differences in thermal growth between theouter case 70 and theforward blocker ring 82. The sealingsystem 90 accommodates significant radial displacement as theouter case 70 may be manufactured of one material such as an organic matrix composite material while theforward blocker ring 82 may be manufactured of another material such as titanium, each of which has significantly different coefficients of thermal expansion. The sealingsystem 90 also withstands relatively high temperatures and high operational pressures. The sealingsystem 90 also accommodates dynamic rotational movements and relatively small “dither” movements from theactuator 86. The sealingsystem 90 may be of an annular racetrack shape to comply with the design space. It should be understood that other annular shapes such as rectilinear and others will also benefit herefrom. - With reference to
FIG. 7 , the sealing system 90-1 in one disclosed non-limiting embodiment generally includes a seal carrier 94-1 and a compliant seal 96-1 that are of a racetrack shape to seal a slot-shapedopening 89 in thecover plate 88. The seal carrier 94-1 may be manufactured of a rigid material such as a metal alloy to provide axial support to the compliant seal 96-1 and limit contact with theblocker ring tab 92. The seal carrier 94-1 also reduces the sealed gap, which reduces the possibility of extrusion of the compliant seal 96-1. The seal carrier 94-1 may provide a machined radius on an inboard surface 98 and an outboard surface 100 to closely fit theforward blocker ring 82 and provide mistake-proof installation. Alternatively, the seal carrier 94-1 is machined only on the inboard surface 98 to increase stiffness and reduce the extrusion gap. - With reference to
FIG. 8 , the compliant seal 96-1 may be manufactured of a compliant material and define an “E” shape in cross-section. Eachleg 102 of the compliant seal 96-1 may include adistal end 104 that is thicker than theleg 102 to facilitate a seal interface with theouter case 70, thecover plate 88 and theforward blocker ring 82. It should be understood that other cross-sectional shapes for the distal ends 104 may alternatively be provided. - With reference to
FIG. 9 , a sealing system 90-2 in another disclosed non-limiting embodiment generally includes a seal carrier 94-2 and a compliant seal 96-2. The seal carrier 94-2 includes analignment rib 106 that interfaces with aslot 108 in the compliant seal 96-2 (FIGS. 10 and 11 ). Thealignment rib 106 is located about anouter periphery 110 of the seal carrier 94-2 and theslot 108 is located about aninner periphery 112 of the compliant seal 96-2. In one disclosed, non-limiting embodiment, theslot 108 is located opposite thecentral leg 102. Eachleg 102 of the compliant seal 96-2 includes adistal end 104 that is thicker than theleg 102. In this disclosed non-limited embodiment thedistal end 104 is triangular shaped. - In cross section (
FIG. 9 ), thealignment rib 106 can take the shape of a square, rectangle, triangle, oval, circle, I-Beam, polygon, or any other geometry. Thealignment rib 106 provides a stiffness increase that resists collapse of the compliant seal 96-2 under pressure into the actuationblocker ring tab 92 to facilitate a more compact design. Thealignment rib 106 also positions and maintains the compliant seal 96-2 within the rigid seal carrier 94-2 to facilitate assembly. - With reference to
FIG. 12 , a sealing system 90-3 in another disclosed non-limiting embodiment generally includes a cover plate 88-3 with a cover plateradial flange 114. The cover plateradial flange 114 supports and positions the compliant seal 96-3 as well as eliminates the separate seal carrier as describe above. The stiffness of the cover plateradial flange 114 limits deflections of the compliant seal 96-3 when pressurized as well as provides a close interface with theblocker ring tab 92. - The compliant seal 96-3 may be installed onto the cover plate
radial flange 114 to facilitate assembly and protect the compliant seal 96-3 from theblocker ring tab 92. This configuration eliminates any seal gap on the cover plate side. The cover plateradial flange 114 extends radially generally parallel to theblocker ring tab 92 for a distance to accommodate the full thermal expansion (radial) movement of theforward blocker ring 82. The cover plateradial flange 114 also defines aninner surface contour 115 that matches the radius of theforward blocker ring 82. That is, theinner surface contour 115 may be non-linear. - The cover plate
radial flange 114 beneficially facilitates a proper seal of the design space and prevents undesirable axial deflection into theblocker ring tab 92 during engine operation. The cover plateradial flange 114 also facilitates a reduction in the sealed gap which thereby decreases the possibility of seal extrusion which may otherwise contribute to the reduced service life. - With reference to
FIG. 13 , a sealing system 90-4 in another disclosed non-limiting embodiment generally includes a seal carrier 94-4 with aseal carrier flange 116. Theseal carrier flange 116 supports and positions the compliant seal 96-4. Theseal carrier flange 116 extends generally conformal with the forward blocker ring 82 a close interface therewith. That is, theseal carrier flange 116 is non-linear and follows the radius of theforward blocker ring 82. The seal carrier 94-4 forms atelescoping space 118 to encase the compliant seal 96-4. Any radial extrusion gap common to O-ring type designs is thereby reduced to a single axial gap. - The seal carrier 94-4 positions the compliant seal 96-4 within the
outer case 70 and is dimensioned such that the seal carrier 94-4 will maintain contact with theouter case 70 andcover plate 88 while limiting deflection of the compliant seal 96-4. This eliminates the sliding of the compliant seal 96-4 during rotation of theforward blocker ring 82 and provides a sliding interface with the seal carrier 94-4 rather than the compliant seal 96-4. A slidingsurface 120 on the seal carrier 94-4 may alternatively be lined with a low friction wear resistant material such as Teflon. - The seal carrier 94-4 facilitates proper sealing of the design space. The seal carrier 94-4 may be manufactured of the same material as the
forward blocker ring 82. The seal carrier 94-4 readily accommodates the radial deflections due to thermal growth between theouter case 70 andforward blocker ring 82 by allowing the seal carrier 94-4 to extend radially outward through thecover plate 88. This provides a design space operable to meet full compression due to thermal growth. The gap is also reconfigured from a radial gap to an axial gap. In addition, the seal carrier 94-4 protects the compliant seal 96-4 from contact with theblocker ring tab 92. The seal carrier 94-4 also beneficially provides a static surface for the compliant seal 96-4 and moves the sliding surface and wear potential to the seal carrier 94-4. - With reference to
FIG. 14 , a sealing system 90-5 in another disclosed non-limiting embodiment generally includes afirst support ring 122, asecond support ring 124, aspring 126, an outercompliant seal 128 and an innercompliant seal 130. Thefirst support ring 122 and thesecond support ring 124 respectively support the outercompliant seal 128 and the innercompliant seal 130. Thespring 126 biases thefirst support ring 122 away from thesecond support ring 124 such that the outercompliant seal 128 seals with thecover plate 88 and the innercompliant seal 130 seals with theforward blocker ring 82. - The
spring 126 may be located within afirst recess 131 in thefirst support ring 122 and asecond recess 133 in thesecond support ring 124. Thefirst support ring 122 is also at least partially received within thesecond recess 133 to provide stability therebetween as thefirst support ring 122 telescopes with respect to thesecond support ring 124. - The
first support ring 122 and thesecond support ring 124 may be manufactured of metal alloy and provide a relatively significant axial stiffness to prevent deflections under pressure and eliminate contact with theblocker ring tab 92. The telescoping interface eliminates the possibility of seal extrusion which may otherwise contribute to reduced service life. The essentially all-metal alloy sealing system 90-5 also facilities operation at elevated temperatures. - With reference to
FIG. 15 , a sealing system 90-6 in another disclosed non-limiting embodiment generally includes a seal carrier 94-6 and a “W”seal 134. The seal carrier 94-6 rides on theforward blocker ring 82 and the “W”seal 134 maintains the seal carrier 94-6 in contact with theforward blocker ring 82 throughout the thermal growth range. A slidingsurface 135 on the seal carrier 94-6 may also be lined with a low friction wear resistant material. - The seal carrier 94-6 and the “W”
seal 134 may be manufactured of a metal alloy to facilitate an effective seal of the design space as well as provide stiffness to the sealing system 90-6 to prevent axial deflections under pressure and potential contact with theblocker ring tab 92. The metal alloy “W”seal 134 eliminates the compliant seal and thereby the possibility of seal extrusion which may otherwise contribute to reduced service life. The essentially all-metal alloy sealing system 90-6 also facilities operation at elevated temperatures. - With reference to
FIG. 16 , a sealing system 90-7 in another disclosed non-limiting embodiment generally includes a cover plate 88-7 with aradial flange 136, aseal carrier 138, aspring system 140, a compliantinner seal 142 and a compliantouter seal 144. Theradial flange 136 surrounds theblocker ring tab 92 and extends into theouter case 70 toward theforward blocker ring 82. - The
seal carrier 138 rides on theforward blocker ring 82 and thespring 140 maintains theseal carrier 138 in contact with theforward blocker ring 82 throughout the thermal growth range. A slidingsurface 146 on theseal carrier 138 may also be lined with a low friction wear resistant material. Theinner seal 142 and theouter seal 144 extend axially from theseal carrier 138 to respectively seal with theradial flange 136 and theouter case 70. - The metal
alloy seal carrier 138 eliminates the possibility of seal extrusion which may otherwise contribute to reduced service life. The essentially all-metal alloy sealing system 90-7 also facilities operation at elevated temperatures. - It should be understood that like reference numerals identify corresponding or similar elements throughout the several drawings. It should also be understood that although a particular component arrangement is disclosed in the illustrated embodiment, other arrangements will benefit herefrom.
- Although the different non-limiting embodiments have specific illustrated components, the embodiments of this invention are not limited to those particular combinations. It is possible to use some of the components or features from any of the non-limiting embodiments in combination with features or components from any of the other non-limiting embodiments.
- Although particular step sequences are shown, described, and claimed, it should be understood that steps may be performed in any order, separated or combined unless otherwise indicated and will still benefit from the present disclosure.
- The foregoing description is exemplary rather than defined by the limitations within. Various non-limiting embodiments are disclosed herein, however, one of ordinary skill in the art would recognize that various modifications and variations in light of the above teachings will fall within the scope of the appended claims. It is therefore to be understood that within the scope of the appended claims, the disclosure may be practiced other than as specifically described. For that reason the appended claims should be studied to determine true scope and content.
Claims (20)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/150,411 US20140290269A1 (en) | 2013-03-08 | 2014-01-08 | Duct blocker seal assembly for a gas turbine engine |
US15/895,058 US10578026B2 (en) | 2013-03-08 | 2018-02-13 | Duct blocker seal assembly for a gas turbine engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361775211P | 2013-03-08 | 2013-03-08 | |
US14/150,411 US20140290269A1 (en) | 2013-03-08 | 2014-01-08 | Duct blocker seal assembly for a gas turbine engine |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/895,058 Division US10578026B2 (en) | 2013-03-08 | 2018-02-13 | Duct blocker seal assembly for a gas turbine engine |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140290269A1 true US20140290269A1 (en) | 2014-10-02 |
Family
ID=51619456
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/150,385 Active 2035-04-07 US9605596B2 (en) | 2013-03-08 | 2014-01-08 | Duct blocker seal assembly for a gas turbine engine |
US14/150,411 Abandoned US20140290269A1 (en) | 2013-03-08 | 2014-01-08 | Duct blocker seal assembly for a gas turbine engine |
US15/895,058 Active US10578026B2 (en) | 2013-03-08 | 2018-02-13 | Duct blocker seal assembly for a gas turbine engine |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/150,385 Active 2035-04-07 US9605596B2 (en) | 2013-03-08 | 2014-01-08 | Duct blocker seal assembly for a gas turbine engine |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/895,058 Active US10578026B2 (en) | 2013-03-08 | 2018-02-13 | Duct blocker seal assembly for a gas turbine engine |
Country Status (1)
Country | Link |
---|---|
US (3) | US9605596B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160215638A1 (en) * | 2015-01-22 | 2016-07-28 | United Technologies Corporation | Seal with backup seal |
US9850773B2 (en) | 2014-05-30 | 2017-12-26 | United Technologies Corporation | Dual walled seal assembly |
US10215098B2 (en) | 2015-01-22 | 2019-02-26 | United Technologies Corporation | Bearing compartment seal |
US10370992B2 (en) | 2016-02-24 | 2019-08-06 | United Technologies Corporation | Seal with integral assembly clip and method of sealing |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3163431A (en) * | 1960-06-06 | 1964-12-29 | Charles L Tanner | Seal ring means |
US4361331A (en) * | 1979-10-22 | 1982-11-30 | Balzers Aktiengesellschaft fur Hochvakuumtechnic und Dunne Schichten | Seal for vacuum flange connections |
US20050220611A1 (en) * | 2004-03-31 | 2005-10-06 | Nitin Bhate | Hybrid seal and system and method incorporating the same |
US20120195743A1 (en) * | 2011-01-31 | 2012-08-02 | General Electric Company | Flexible seal for turbine engine |
US20130001892A1 (en) * | 2011-06-29 | 2013-01-03 | Smith Darren M | Fan duct blocker actuation tab seal |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3161318A (en) * | 1963-02-04 | 1964-12-15 | Rudolph E Krueger | Sealing means |
US3275335A (en) * | 1963-03-18 | 1966-09-27 | Donaldson Co Inc | High pressure seal |
US3783618A (en) * | 1972-03-29 | 1974-01-08 | O Kawamura | Aerodynamic engine system |
US3879940A (en) * | 1973-07-30 | 1975-04-29 | Gen Electric | Gas turbine engine fuel delivery tube assembly |
DE2346332A1 (en) * | 1973-09-14 | 1975-03-27 | Babcock & Wilcox Ag | SEAL FOR THE CLOSURE OF A PRESSURE VESSEL |
US4093122A (en) | 1976-11-03 | 1978-06-06 | Rohr Industries, Inc. | Integrated divergent exhaust nozzle thrust reverser |
US5809772A (en) * | 1996-03-29 | 1998-09-22 | General Electric Company | Turbofan engine with a core driven supercharged bypass duct |
US6471216B1 (en) | 1999-05-24 | 2002-10-29 | General Electric Company | Rotating seal |
US6481211B1 (en) | 2000-11-06 | 2002-11-19 | Joel C. Haas | Turbine engine cycling thermo-mechanical stress control |
US7163369B2 (en) * | 2003-05-27 | 2007-01-16 | General Electric Company | Variable stator vane bushings and washers |
US7823375B2 (en) | 2005-08-01 | 2010-11-02 | Sikorsky Aircraft Corporation | Infrared suppression system |
EP1925783B1 (en) * | 2006-11-22 | 2012-05-02 | Siemens Aktiengesellschaft | Variable stator blade assembly |
GB0703827D0 (en) * | 2007-02-28 | 2007-04-11 | Rolls Royce Plc | Rotor seal segment |
US8206102B2 (en) | 2007-08-16 | 2012-06-26 | United Technologies Corporation | Attachment interface for a gas turbine engine composite duct structure |
US8141366B2 (en) | 2008-08-19 | 2012-03-27 | United Technologies Corporation | Gas turbine engine with variable area fan nozzle |
US8240126B2 (en) | 2008-03-22 | 2012-08-14 | Pratt & Whitney Rocketdyne, Inc. | Valve system for a gas turbine engine |
US8286416B2 (en) | 2008-04-02 | 2012-10-16 | Pratt & Whitney Rocketdyne, Inc. | Valve system for a gas turbine engine |
US8091371B2 (en) * | 2008-11-28 | 2012-01-10 | Pratt & Whitney Canada Corp. | Mid turbine frame for gas turbine engine |
US8221062B2 (en) | 2009-01-14 | 2012-07-17 | General Electric Company | Device and system for reducing secondary air flow in a gas turbine |
GB0907278D0 (en) * | 2009-04-29 | 2009-06-10 | Rolls Royce Plc | A seal arrangement and a method of repairing a seal arrangement |
US8366113B2 (en) * | 2010-06-10 | 2013-02-05 | Eaton Corporation | Pre-compressed seal including removable pre-compression member |
US8366382B1 (en) * | 2012-01-31 | 2013-02-05 | United Technologies Corporation | Mid-turbine frame buffer system |
-
2014
- 2014-01-08 US US14/150,385 patent/US9605596B2/en active Active
- 2014-01-08 US US14/150,411 patent/US20140290269A1/en not_active Abandoned
-
2018
- 2018-02-13 US US15/895,058 patent/US10578026B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3163431A (en) * | 1960-06-06 | 1964-12-29 | Charles L Tanner | Seal ring means |
US4361331A (en) * | 1979-10-22 | 1982-11-30 | Balzers Aktiengesellschaft fur Hochvakuumtechnic und Dunne Schichten | Seal for vacuum flange connections |
US20050220611A1 (en) * | 2004-03-31 | 2005-10-06 | Nitin Bhate | Hybrid seal and system and method incorporating the same |
US20120195743A1 (en) * | 2011-01-31 | 2012-08-02 | General Electric Company | Flexible seal for turbine engine |
US20130001892A1 (en) * | 2011-06-29 | 2013-01-03 | Smith Darren M | Fan duct blocker actuation tab seal |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9850773B2 (en) | 2014-05-30 | 2017-12-26 | United Technologies Corporation | Dual walled seal assembly |
US20160215638A1 (en) * | 2015-01-22 | 2016-07-28 | United Technologies Corporation | Seal with backup seal |
US10161256B2 (en) * | 2015-01-22 | 2018-12-25 | Untied Technologies Corporation | Seal with backup seal |
US10215098B2 (en) | 2015-01-22 | 2019-02-26 | United Technologies Corporation | Bearing compartment seal |
US10370992B2 (en) | 2016-02-24 | 2019-08-06 | United Technologies Corporation | Seal with integral assembly clip and method of sealing |
US20200032667A1 (en) * | 2016-02-24 | 2020-01-30 | United Technologies Corporation | Seal with integral assembly clip and method of sealing |
US11459904B2 (en) * | 2016-02-24 | 2022-10-04 | Raytheon Technologies Corporation | Seal with integral assembly clip and method of sealing |
Also Published As
Publication number | Publication date |
---|---|
US10578026B2 (en) | 2020-03-03 |
US20180179959A1 (en) | 2018-06-28 |
US20140290213A1 (en) | 2014-10-02 |
US9605596B2 (en) | 2017-03-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8196934B2 (en) | Slider seal assembly for gas turbine engine | |
US10578026B2 (en) | Duct blocker seal assembly for a gas turbine engine | |
EP3219933B1 (en) | Seal assembly, gas turbine having the same, and method of assembling a seal assembly | |
US9951643B2 (en) | Rapid response clearance control system with spring assist for gas turbine engine | |
US10316683B2 (en) | Gas turbine engine blade outer air seal thermal control system | |
US10370999B2 (en) | Gas turbine engine rapid response clearance control system with air seal segment interface | |
US9915162B2 (en) | Flexible feather seal for blade outer air seal gas turbine engine rapid response clearance control system | |
US9988919B2 (en) | Dual compliant seal | |
US20190078453A1 (en) | Seal interface with a deflection control feature | |
US10001022B2 (en) | Seals for gas turbine engine | |
US10036263B2 (en) | Stator assembly with pad interface for a gas turbine engine | |
US10168052B2 (en) | Combustor bulkhead heat shield | |
US10316684B2 (en) | Rapid response clearance control system for gas turbine engine | |
US10557368B2 (en) | Gas turbine engine rapid response clearance control system with variable volume turbine case | |
US10184358B2 (en) | Retractable exhaust liner segment for gas turbine engines | |
US10557367B2 (en) | Accessible rapid response clearance control system | |
US6357752B1 (en) | Brush seal | |
US9915228B2 (en) | Air with integral spring for a gas turbine engine exhaust drive | |
US10774685B2 (en) | Gas turbine engine exhaust component | |
EP3699400B1 (en) | Gas turbine engine system with light weight low blockage slider seal | |
US10378451B2 (en) | Large displacement high temperature seal | |
US11920487B1 (en) | Gas turbine engine including flow path flex seal with cooling air bifurcation |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
|
AS | Assignment |
Owner name: RAYTHEON TECHNOLOGIES CORPORATION, MASSACHUSETTS Free format text: CHANGE OF NAME;ASSIGNOR:UNITED TECHNOLOGIES CORPORATION;REEL/FRAME:054062/0001 Effective date: 20200403 |
|
AS | Assignment |
Owner name: RAYTHEON TECHNOLOGIES CORPORATION, CONNECTICUT Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE AND REMOVE PATENT APPLICATION NUMBER 11886281 AND ADD PATENT APPLICATION NUMBER 14846874. TO CORRECT THE RECEIVING PARTY ADDRESS PREVIOUSLY RECORDED AT REEL: 054062 FRAME: 0001. ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF ADDRESS;ASSIGNOR:UNITED TECHNOLOGIES CORPORATION;REEL/FRAME:055659/0001 Effective date: 20200403 |
|
AS | Assignment |
Owner name: RTX CORPORATION, CONNECTICUT Free format text: CHANGE OF NAME;ASSIGNOR:RAYTHEON TECHNOLOGIES CORPORATION;REEL/FRAME:064402/0837 Effective date: 20230714 |