DE69422737T2 - Fiberverstärkter compositflügelholm für ein drehflügelflugzeug und verfahren zu dessen herstellung - Google Patents

Fiberverstärkter compositflügelholm für ein drehflügelflugzeug und verfahren zu dessen herstellung

Info

Publication number
DE69422737T2
DE69422737T2 DE69422737T DE69422737T DE69422737T2 DE 69422737 T2 DE69422737 T2 DE 69422737T2 DE 69422737 T DE69422737 T DE 69422737T DE 69422737 T DE69422737 T DE 69422737T DE 69422737 T2 DE69422737 T2 DE 69422737T2
Authority
DE
Germany
Prior art keywords
laminates
cross
composite
ply
regions
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.)
Expired - Lifetime
Application number
DE69422737T
Other languages
German (de)
English (en)
Other versions
DE69422737D1 (de
Inventor
William Degnan
D. Jones
A. Kovalsky
C. Purse
C. Reinfelder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RTX Corp
Original Assignee
United Technologies Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by United Technologies Corp filed Critical United Technologies Corp
Application granted granted Critical
Publication of DE69422737D1 publication Critical patent/DE69422737D1/de
Publication of DE69422737T2 publication Critical patent/DE69422737T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/32—Rotors
    • B64C27/46—Blades
    • B64C27/473—Constructional features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/302—Details of the edges of fibre composites, e.g. edge finishing or means to avoid delamination
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
    • B29C70/446—Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0025—Producing blades or the like, e.g. blades for turbines, propellers, or wings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
    • B29L2031/082—Blades, e.g. for helicopters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/32—Rotors
    • B64C27/46—Blades
    • B64C27/473—Constructional features
    • B64C2027/4733—Rotor blades substantially made from particular materials
    • B64C2027/4736—Rotor blades substantially made from particular materials from composite materials
    • 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
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/49336—Blade making

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Moulding By Coating Moulds (AREA)
  • Laminated Bodies (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
DE69422737T 1994-08-31 1994-08-31 Fiberverstärkter compositflügelholm für ein drehflügelflugzeug und verfahren zu dessen herstellung Expired - Lifetime DE69422737T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1994/009967 WO1996006776A1 (en) 1994-08-31 1994-08-31 Fiber reinforced composite spar for a rotary wing aircraft and method of manufacture thereof

Publications (2)

Publication Number Publication Date
DE69422737D1 DE69422737D1 (de) 2000-02-24
DE69422737T2 true DE69422737T2 (de) 2000-08-17

Family

ID=22242946

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69422737T Expired - Lifetime DE69422737T2 (de) 1994-08-31 1994-08-31 Fiberverstärkter compositflügelholm für ein drehflügelflugzeug und verfahren zu dessen herstellung

Country Status (11)

Country Link
US (1) US5755558A (enExample)
EP (1) EP0783431B1 (enExample)
JP (1) JP3631493B2 (enExample)
KR (1) KR100311562B1 (enExample)
CA (1) CA2198717C (enExample)
DE (1) DE69422737T2 (enExample)
IL (1) IL114946A (enExample)
TR (1) TR199501085A2 (enExample)
TW (1) TW279149B (enExample)
WO (1) WO1996006776A1 (enExample)
ZA (1) ZA957265B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2762959C1 (ru) * 2021-08-10 2021-12-24 Геннадий Алексеевич Павлов Способ изготовления лопатки из полимерного композиционного материала осевого воздушного нагнетателя судна на воздушной подушке

Families Citing this family (69)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69910174T3 (de) † 1999-04-07 2012-03-08 Mcdonnell Douglas Corp. Wissensbasierter Entwurfsoptimierungsprozess für Verbundwerkstoffe und System dafür
DE19959598A1 (de) * 1999-12-10 2001-06-13 Rolls Royce Deutschland Verfahren zum Herstellen einer Schaufel einer Strömungsmaschine
US6893733B2 (en) 2000-07-07 2005-05-17 Delphi Technologies, Inc. Modified contoured crushable structural members and methods for making the same
US6586110B1 (en) 2000-07-07 2003-07-01 Delphi Technologies, Inc. Contoured metal structural members and methods for making the same
US6949282B2 (en) 2000-07-07 2005-09-27 Delphi Technologies, Inc. Contoured crushable composite structural members and methods for making the same
US6708921B2 (en) 2001-04-20 2004-03-23 Bell Helicopter Textron, Inc. Composite flapping flexure
US6544002B1 (en) * 2001-11-07 2003-04-08 General Electric Company Method of chemical pretreatment of a lightweight jet engine fan blade
US6834685B2 (en) * 2001-12-19 2004-12-28 Warwick Mills, Inc. Bi-modulus reinforcement fabric
NL1019957C2 (nl) * 2002-02-13 2003-10-03 Stork Fokker Aesp Bv Gelamineerd paneel met discontinue inwendige laag.
US7165945B2 (en) * 2003-08-22 2007-01-23 Sikorsky Aircraft Corporation Braided spar for a rotor blade and method of manufacture thereof
US7575417B2 (en) * 2003-09-05 2009-08-18 General Electric Company Reinforced fan blade
US20050186081A1 (en) * 2004-02-24 2005-08-25 Mohamed Mansour H. Wind blade spar cap and method of making
US7247003B2 (en) 2004-12-02 2007-07-24 Siemens Power Generation, Inc. Stacked lamellate assembly
US7802968B2 (en) * 2005-07-29 2010-09-28 General Electric Company Methods and apparatus for reducing load in a rotor blade
US7427189B2 (en) * 2006-02-13 2008-09-23 General Electric Company Wind turbine rotor blade
JP4699255B2 (ja) * 2006-03-24 2011-06-08 三菱重工業株式会社 風車翼
US7942639B2 (en) * 2006-03-31 2011-05-17 General Electric Company Hybrid bucket dovetail pocket design for mechanical retainment
US7588421B2 (en) * 2006-03-31 2009-09-15 General Electric Company Methods and apparatus for mechanical retainment of non-metallic fillers in pockets
US8101262B2 (en) * 2006-09-28 2012-01-24 Toray Industries, Inc. Fiber-reinforced plastic and process for production thereof
US7749421B2 (en) * 2006-12-27 2010-07-06 Hexcel Corporation Helicopter blade mandrel
DE602007007905D1 (de) * 2007-05-07 2010-09-02 Siemens Ag Verfahren zur Herstellung eine Windturbinenschaufel
US7851040B2 (en) * 2007-10-24 2010-12-14 Embraer - Empresa Brasileira De Aeronautica S.A. Methods for making composite material components especially useful for aircraft, and composite material components thereof
US8066504B2 (en) * 2008-01-25 2011-11-29 Hexcel Corporation Helicopter blade mandrel with roller assembly
US8123463B2 (en) * 2008-07-31 2012-02-28 General Electric Company Method and system for manufacturing a blade
US20100143142A1 (en) * 2008-12-11 2010-06-10 Afroz Akhtar Sparcap system for wind turbine rotor blade and method of fabricating wind turbine rotor blade
US7942637B2 (en) * 2008-12-11 2011-05-17 General Electric Company Sparcap for wind turbine rotor blade and method of fabricating wind turbine rotor blade
US9073270B2 (en) * 2009-01-21 2015-07-07 Vestas Wind Systems A/S Method of manufacturing a wind turbine blade by embedding a layer of pre-cured fibre reinforced resin
CN201376388Y (zh) * 2009-01-23 2010-01-06 维斯塔斯风力系统有限公司 预成型件以及包括增强结构的翼梁
EP2246260B1 (en) * 2009-04-29 2011-08-31 EUROCOPTER DEUTSCHLAND GmbH Rotor blade made of a fibre-reinforced composite material
EP2246259B1 (en) * 2009-04-29 2012-12-12 Eurocopter Deutschland GmbH Rotor wing with integrated tension-torque-transmission element and method for its production
RU2560194C2 (ru) * 2009-05-28 2015-08-20 Сосьете Лоррен Де Констрюксьон Эронотик Композитная конструктивная панель задней кромки элемента летательного аппарата
EP2295235B1 (en) * 2009-08-20 2013-07-03 Siemens Aktiengesellschaft Fiber reinforced plastic-structure and a method to produce the fiber reinforced plastic-structure
US9505491B2 (en) * 2010-08-19 2016-11-29 Sikorsky Aircraft Corporation Helicopter composite blade spar and method
IT1401996B1 (it) * 2010-09-30 2013-08-28 Wilic Sarl Metodo per realizzare un longherone tubolare di una pala di una turbina eolica
EP2665595A1 (en) * 2011-01-21 2013-11-27 Saab AB A composite article and a method of forming a composite article
GB201103125D0 (en) * 2011-02-23 2011-04-06 Airbus Uk Ltd Composite structure
GB201103122D0 (en) * 2011-02-23 2011-04-06 Airbus Uk Ltd Composite structure
JP5738033B2 (ja) 2011-03-28 2015-06-17 三菱重工業株式会社 複合材構造体の成形方法
US9168998B2 (en) * 2011-11-23 2015-10-27 The Boeing Company Composite propeller spar
US9238338B2 (en) * 2011-12-07 2016-01-19 The Boeing Company Method of fabricating composite laminate structures allowing ply slippage during forming
WO2014143265A1 (en) * 2013-03-15 2014-09-18 United Technologies Corporation Hybrid fan blade biscuit construction
US10323521B2 (en) * 2013-03-15 2019-06-18 United Technologies Corporation Hybrid fan blade biscuit construction
US10167075B2 (en) 2013-06-25 2019-01-01 The Boeing Company Joint assembly and method of forming thereof
US9511537B2 (en) 2013-06-25 2016-12-06 Sikorsky Aircraft Corporation Bonding tool, system to apply pressure during a bonding process and method to apply pressure during a bonding process
WO2015069344A1 (en) 2013-08-28 2015-05-14 Sikorsky Aircraft Corporation High modulus hybrid material rotor blade spar
WO2015183658A1 (en) * 2014-05-30 2015-12-03 Sikorsky Aircraft Corporation Structurally efficient pin wrap
US10406763B2 (en) * 2014-08-15 2019-09-10 Sikorsky Aircraft Corporation Rotor blade spar formation with automated fiber placement
WO2017048829A1 (en) * 2015-09-15 2017-03-23 Cytec Industries Inc. Prepreg tile having offset stagger
US10589837B2 (en) 2016-02-08 2020-03-17 Bell Helicopter Textron Inc. Spar for a composite wing structure
US10513325B2 (en) 2016-02-08 2019-12-24 Bell Helicopter Textron Inc. Joint member for a composite wing structure
US10836121B2 (en) 2016-02-08 2020-11-17 Bell Helicopter Textron Inc. Methods of manufacture of a composite wing structure
US9981736B2 (en) * 2016-05-16 2018-05-29 Bell Helicopter Textron Inc. Folding proprotor blade assembly having integral tang assembly
US10239604B2 (en) 2016-05-21 2019-03-26 Bell Helicopter Textron Inc. Structurally biased proprotor blade assembly
EP3318394B1 (en) 2016-11-04 2026-03-18 Ratier-Figeac SAS Composite structure
FR3069185B1 (fr) * 2017-07-18 2020-07-24 Airbus Operations Sas Profil aerodynamique a noyau creux oblong arrondi en materiau composite renforce par un textile a fibres unidirectionnelles
ES2940682T3 (es) 2017-09-04 2023-05-10 Lm Wind Power As Una pala de turbina eólica y un método de fabricación de la pala de turbina eólica
EP3556544B1 (en) * 2018-04-17 2021-07-28 Ratier-Figeac SAS Propeller blade spar
US11592062B2 (en) 2019-04-23 2023-02-28 Hamilton Sundstrand Corporation Composite lug with enhanced performance
EP3848488B1 (en) * 2020-01-08 2025-10-08 Ratier-Figeac SAS Propeller blade comprising a core and a braided cover of said core, bobbin and method for for braiding said braided cover
EP3970954B1 (en) * 2020-09-17 2023-11-15 Airbus Operations, S.L.U. Composite laminate for an airframe lifting surface and method for manufacturing thereof
US12110104B2 (en) * 2022-08-31 2024-10-08 Lockheed Martin Corporation Method of stabilizing articulated rotor blade
US12680552B2 (en) 2022-11-14 2026-07-14 General Electric Company Turbomachine and method of assembly
US12674468B2 (en) 2022-11-14 2026-07-07 General Electric Company Turbomachine and method of assembly
US11852161B1 (en) 2022-11-14 2023-12-26 General Electric Company Turbomachine and method of assembly
US12674467B2 (en) 2022-11-14 2026-07-07 General Electric Company Turbomachine and method of assembly
US12663016B2 (en) 2022-11-14 2026-06-23 General Electric Company Turbomachine and method of assembly
US12692874B2 (en) 2022-11-14 2026-07-28 General Electric Company Turbomachine and method of assembly
US12448897B2 (en) * 2024-01-31 2025-10-21 Rtx Corporation Gas turbine engine component formed by CMCS and having a compressed insert with tapered ends
US20250361814A1 (en) * 2024-05-23 2025-11-27 General Electric Company Composite airfoil for a turbine engine

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490983A (en) * 1965-05-17 1970-01-20 Hitco Fiber reinforced structures and methods of making the same
US3782856A (en) * 1972-05-31 1974-01-01 United Aircraft Corp Composite aerodynamic blade with twin-beam spar
US3754840A (en) * 1972-05-31 1973-08-28 United Aircraft Corp Composite helicopter rotor and blade
FR2234130B1 (enExample) * 1973-05-14 1976-04-30 Kamov Nikolai
US4247258A (en) * 1978-11-13 1981-01-27 United Technologies Corporation Composite wind turbine blade
GB2040790B (en) * 1979-02-05 1982-10-13 Westland Aircraft Ltd Moulding hollow articles
US4529139A (en) * 1980-10-20 1985-07-16 United Technologies Corporation Method of manufacturing a filament wound article
IT1161534B (it) * 1983-10-26 1987-03-18 Agusta Aeronaut Costr Longherone per pala di elicottero e metodo per la sua realizzazione
US4657615A (en) * 1984-08-20 1987-04-14 The Boeing Company Composite leading edge/spar member for an aircraft control surface
US4621980A (en) * 1984-09-19 1986-11-11 United Technologies Corporation Fiber reinforced composite spar for a rotary wing aircraft
US4728263A (en) * 1986-08-25 1988-03-01 Basso Robert J Wind turbine blade construction
US4976587A (en) * 1988-07-20 1990-12-11 Dwr Wind Technologies Inc. Composite wind turbine rotor blade and method for making same
US5087187A (en) * 1990-03-09 1992-02-11 United Technologies Corporation Apparatus for molding hollow composite articles having internal reinforcement structures

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2762959C1 (ru) * 2021-08-10 2021-12-24 Геннадий Алексеевич Павлов Способ изготовления лопатки из полимерного композиционного материала осевого воздушного нагнетателя судна на воздушной подушке

Also Published As

Publication number Publication date
EP0783431B1 (en) 2000-01-19
CA2198717C (en) 2005-03-15
KR100311562B1 (ko) 2002-01-17
TR199501085A2 (tr) 1996-06-21
ZA957265B (en) 1996-04-03
CA2198717A1 (en) 1996-03-07
EP0783431A1 (en) 1997-07-16
WO1996006776A1 (en) 1996-03-07
JPH10505033A (ja) 1998-05-19
TW279149B (enExample) 1996-06-21
US5755558A (en) 1998-05-26
IL114946A (en) 1999-10-28
DE69422737D1 (de) 2000-02-24
IL114946A0 (en) 1995-12-08
KR970705499A (ko) 1997-10-09
JP3631493B2 (ja) 2005-03-23

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