JP7430703B2 - ターボ機械用熱交換器およびその製造 - Google Patents
ターボ機械用熱交換器およびその製造 Download PDFInfo
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- JP7430703B2 JP7430703B2 JP2021505322A JP2021505322A JP7430703B2 JP 7430703 B2 JP7430703 B2 JP 7430703B2 JP 2021505322 A JP2021505322 A JP 2021505322A JP 2021505322 A JP2021505322 A JP 2021505322A JP 7430703 B2 JP7430703 B2 JP 7430703B2
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- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 239000012530 fluid Substances 0.000 claims description 42
- 238000007789 sealing Methods 0.000 claims description 29
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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Classifications
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- 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
- F02K3/08—Plants including a gas turbine driving a compressor or a ducted fan with supplementary heating of the working fluid; Control thereof
- F02K3/105—Heating the by-pass flow
- F02K3/115—Heating the by-pass flow by means of indirect heat exchange
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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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/02—De-icing means for engines having icing phenomena
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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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
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- 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
- F02C7/12—Cooling of plants
- F02C7/14—Cooling of plants of fluids in the plant, e.g. lubricant or fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0471—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits having a non-circular cross-section
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/005—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for only one medium being tubes having bent portions or being assembled from bent tubes or being tubes having a toroidal configuration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/26—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being integral with the element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0246—Arrangements for connecting header boxes with flow lines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
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- 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
- F05D2240/80—Platforms for stationary or moving blades
- F05D2240/81—Cooled platforms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/20—Heat transfer, e.g. cooling
- F05D2260/213—Heat transfer, e.g. cooling by the provision of a heat exchanger within the cooling circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/20—Heat transfer, e.g. cooling
- F05D2260/221—Improvement of heat transfer
- F05D2260/2214—Improvement of heat transfer by increasing the heat transfer surface
- F05D2260/22141—Improvement of heat transfer by increasing the heat transfer surface using fins or ribs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2220/00—Closure means, e.g. end caps on header boxes or plugs on conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box
- F28F9/0268—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box in the form of multiple deflectors for channeling the heat exchange medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/028—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using inserts for modifying the pattern of flow inside the header box, e.g. by using flow restrictors or permeable bodies or blocks with channels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/0282—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by varying the geometry of conduit ends, e.g. by using inserts or attachments for modifying the pattern of flow at the conduit inlet or outlet
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Description
a)環状部分のプリフォームを、プリフォームが第1の回路の第1の導管および第2の導管を備えるように成形されたダイを利用して、押出成形によって得るステップと、
b)環状部分の第1の円周方向端部に第1の空洞を作製するステップと、
c)第2の導管から、第1の空洞へ、そしてその後第1の導管に流体が流れることを可能にするように、前記第1の端部に取り外し可能な密封手段を取り付けるステップと、
を備える。
Claims (9)
- 長手方向軸線(L)を備え、ターボ機械のケーシングの環状シェルによって支持されることが意図された、ターボ機械用の環状熱交換器(12a)であって、環状方向に延在する、少なくとも1つの第1の導管(38)および少なくとも1つの第2の導管(40)を備える第1の流体回路(37)を具備する一体式の環状部分(18)を備え、第1の導管(38)および第2の導管(40)は、前記環状部分(18)の第1の円周方向端部(13)に形成された第1の空洞(48)へと開口すること、ならびに、前記第1の円周方向端部(13)に取り付けられ、第2の導管(40)から第1の空洞(48)へ、かつその後第1の導管(38)に流体が流れることを可能にするように構成された、取り外し可能な密封手段を備え、
長手方向(L)に垂直な円周方向方向に、第1の回路(37)の第1の導管(38)および第2の導管(40)のいずれかの側に配置された、少なくとも1つの第1の導管(44)および少なくとも1つの第2の導管(46)を備える第2の流体回路(42)を備え、第2の回路(42)の第1の導管(44)および第2の導管(46)は、前記環状部分(18)の第1の円周方向端部(13)に形成された第2の空洞(50)であって、長手方向軸線(L)および円周方向に対して垂直な方向に第1の空洞(48)の半径方向外側に配置されている第2の空洞(50)に開口しており、第2の回路(42)の第2の導管(46)から第2の空洞(50)へ、その後第2の回路(42)の第1の導管(44)に流体が流れることを可能にするように、密封手段が同様に前記第1の円周方向端部(13)に取り付けられていることを特徴とする、交換器。 - 第1の空洞(48)は、第1の円周方向端部(13)と同じ高さで円周方向に開口し、密封手段は、前記第1の空洞(48)の出口に取り付けられた第1の密封部材(54)を備える、請求項1に記載の交換器。
- 第2の空洞(50)は、第1の円周方向端部(13)の円周方向で半径方向に開口し、密封手段は、前記第2の空洞(50)の出口に取り付けられた第2の密封部材(56)を備える、請求項1または請求項2に記載の交換器。
- 第2の回路(42)の第1の導管(44)および第2の導管(46)は、環状部分(18)の第1の円周方向端部(13)で円周方向に開口するそれらの端部を密封する第3の部材(58)によって閉鎖される、請求項1~3のいずれか一項に記載の交換器。
- 第2の部材(56)はL字型を有し、第1の部分(56a)は、第1の回路(37)および第2の回路(42)の第1の導管(38、44)および第2の導管(40、46)が開口する面にシールとして取り付けられている、請求項3、または請求項3および4に記載の交換器。
- 第2の部材(56)は、第2の空洞(50)を閉鎖するように環状部分(18)に取り付けられた第2の部分(56b)を有する、請求項5に記載の交換器。
- 第2の部材(56)は、環状部分(18)に取り外し可能に取り付けられている、請求項5または6に記載の交換器。
- 第2の部材(56)は、環状部分(18)にねじ止めされることによって固定される、請求項7に記載の交換器。
- 請求項1~8のいずれか一項に記載の交換器の製造方法であって、
a)環状部分(18)のプリフォームを、プリフォームが第1の回路(37)の第1の導管(38)および第2の導管(40)を備えるように成形されたダイを利用して、押出成形によって得るステップと、
b)環状部分(18)の第1の円周方向端部(13)の高さに第1の空洞(48)を作製するステップと、
c)第2の導管(40)から、第1の空洞(48)へ、次いで第1の導管(38)に流体が流れることを可能にするように、前記第1の円周方向端部(13)に取り外し可能な密封手段を取り付けるステップと、を備える方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1857152 | 2018-07-31 | ||
FR1857152A FR3084699B1 (fr) | 2018-07-31 | 2018-07-31 | Echangeur thermique pour turbomachine et procede de fabrication associe |
PCT/FR2019/051871 WO2020025895A1 (fr) | 2018-07-31 | 2019-07-30 | Echangeur thermique pour turbomachine et procede de fabrication associe |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2021533324A JP2021533324A (ja) | 2021-12-02 |
JP7430703B2 true JP7430703B2 (ja) | 2024-02-13 |
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ID=65200963
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Application Number | Title | Priority Date | Filing Date |
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JP2021505322A Active JP7430703B2 (ja) | 2018-07-31 | 2019-07-30 | ターボ機械用熱交換器およびその製造 |
Country Status (6)
Country | Link |
---|---|
US (1) | US11754020B2 (ja) |
EP (1) | EP3830403B1 (ja) |
JP (1) | JP7430703B2 (ja) |
CN (1) | CN112771265B (ja) |
FR (1) | FR3084699B1 (ja) |
WO (1) | WO2020025895A1 (ja) |
Citations (4)
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JP2014111930A (ja) | 2012-08-07 | 2014-06-19 | Unison Industries Llc | ガスタービンエンジン熱交換器およびガスタービンエンジン熱交換器の組立方法 |
WO2014207784A1 (ja) | 2013-06-26 | 2014-12-31 | 住友精密工業株式会社 | 航空機用エンジンの熱交換器 |
WO2013076567A3 (en) | 2011-11-25 | 2015-02-19 | Pilosio Bruno | Perfected heat exchanger and production method |
US20160348548A1 (en) | 2015-05-29 | 2016-12-01 | Honeywell International Inc. | Internal bypass to improve decongealing of surface type air to oil coolers |
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US4281710A (en) * | 1978-10-25 | 1981-08-04 | Frac, Inc. | Heat exchanger |
JP3113100B2 (ja) * | 1992-11-05 | 2000-11-27 | 株式会社デンソー | 多穴管押出用ダイス及び多穴管 |
FR2713305B1 (fr) * | 1993-11-29 | 1996-02-09 | Valeo Thermique Habitacle | Dispositif de raccord rapide pour tubulures d'échangeur de chaleur. |
US20050092472A1 (en) * | 2003-11-03 | 2005-05-05 | Larry Lewis | Heat exchange system |
FR2914365B1 (fr) * | 2007-03-28 | 2012-05-18 | Airbus France | Systeme de refroidissement et de regulation en temperature d'equipements d'un ensemble propulsif d'aeronef. |
US9677474B2 (en) * | 2013-11-18 | 2017-06-13 | Unison Industries, Llc | Surface cooler support mechanism |
FR3018857B1 (fr) * | 2014-03-21 | 2016-05-06 | Snecma | Circuit de refroidissement d'air chaud sous pression d'une turbomachine d'aeronef comportant un echangeur de chaleur pour refroidir l'air |
FR3034464B1 (fr) * | 2015-04-03 | 2017-03-24 | Snecma | Refroidissement du circuit d'huile d'une turbomachine |
FR3050763B1 (fr) * | 2016-04-28 | 2018-04-13 | Safran Aircraft Engines | Dispositif de circulation d'air pour une turbomachine comportant un systeme de derivation d'air chaud vers un echangeur de chaleur |
FR3060057B1 (fr) * | 2016-12-14 | 2019-08-30 | Safran Aircraft Engines | Circuit fluidique dans une turbomachine |
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2018
- 2018-07-31 FR FR1857152A patent/FR3084699B1/fr active Active
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2019
- 2019-07-30 WO PCT/FR2019/051871 patent/WO2020025895A1/fr unknown
- 2019-07-30 JP JP2021505322A patent/JP7430703B2/ja active Active
- 2019-07-30 US US17/264,636 patent/US11754020B2/en active Active
- 2019-07-30 CN CN201980053265.9A patent/CN112771265B/zh active Active
- 2019-07-30 EP EP19765529.3A patent/EP3830403B1/fr active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013076567A3 (en) | 2011-11-25 | 2015-02-19 | Pilosio Bruno | Perfected heat exchanger and production method |
JP2014111930A (ja) | 2012-08-07 | 2014-06-19 | Unison Industries Llc | ガスタービンエンジン熱交換器およびガスタービンエンジン熱交換器の組立方法 |
WO2014207784A1 (ja) | 2013-06-26 | 2014-12-31 | 住友精密工業株式会社 | 航空機用エンジンの熱交換器 |
US20160348548A1 (en) | 2015-05-29 | 2016-12-01 | Honeywell International Inc. | Internal bypass to improve decongealing of surface type air to oil coolers |
Also Published As
Publication number | Publication date |
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WO2020025895A1 (fr) | 2020-02-06 |
JP2021533324A (ja) | 2021-12-02 |
EP3830403B1 (fr) | 2023-04-19 |
US11754020B2 (en) | 2023-09-12 |
FR3084699B1 (fr) | 2020-09-25 |
EP3830403A1 (fr) | 2021-06-09 |
FR3084699A1 (fr) | 2020-02-07 |
US20210310443A1 (en) | 2021-10-07 |
CN112771265B (zh) | 2024-05-24 |
CN112771265A (zh) | 2021-05-07 |
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