IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0165862
(1993-12-14)
|
| 우선권정보 |
FR-0015607 (1992-12-23) |
|
발명자
/ 주소 |
- Coffy RenL. (Sausset les Pins FRX)
|
| 출원인 / 주소 |
- Europcopter France (Marseille FRX 03)
|
| 인용정보 |
피인용 횟수 :
24 인용 특허 :
0 |
초록
▼
The blade has its lower-surface and upper-surface skins of its shell, its front and rear filling bodies and its spar made of a composite material having the same thermoplastic matrix, preferably made of PEEK, reinforced preferably with carbon fibres. The spar is extended outside the shell by an inte
The blade has its lower-surface and upper-surface skins of its shell, its front and rear filling bodies and its spar made of a composite material having the same thermoplastic matrix, preferably made of PEEK, reinforced preferably with carbon fibres. The spar is extended outside the shell by an integrated rooting part with linkage attachment, in a loop or laminate, in the same thermoplastic composite. The method consists in assembling, by melting, under pressure, all the thermoplastic composite components of the blade, in a single step after manufacturing these components in the form of prefabricated elementary pieces.
대표청구항
▼
A blade, essentially made of composite material, for a rotorcraft rotor, and comprising: a composite rigid shell, with an aerodynamic profile, elongated longitudinally along the span of the blade, one longitudinal end of which is turnable towards a hub of the rotor and includes a blade root, said sh
A blade, essentially made of composite material, for a rotorcraft rotor, and comprising: a composite rigid shell, with an aerodynamic profile, elongated longitudinally along the span of the blade, one longitudinal end of which is turnable towards a hub of the rotor and includes a blade root, said shell including at least one layer of reinforcing fibres agglomerated by a matrix comprising a synthetic rigidifying resin, at least one spar having at least one part housed substantially longitudinally in the shell and including at least one elongate composite bar of continuous and unidirectional reinforcing fibres agglomerated by a matrix comprising a synthetic rigidifying resin, and at least one composite filling body arranged in the shell between the shell and said at least one spar, said at least one filling body including reinforcing fibres agglomerated by a matrix comprising a synthetic rigidifying resin, the resin of the matrices of the shell, of said at least one filling body and of each bar of said at least one spar comprises a thermoplastic resin, which assembles together and provides cohesion between the shell, each part of said at least one spar housed in the shell and said at least one filling body. A method for manufacturing a blade for a rotorcraft rotor comprising a composite shell having a blade rooting part and a lower-surface skin and an upper-surface skin which are laminated, at least one spar and a composite filling body arranged in the shell between the shell and the at least one spar, the method comprising: producing thermoplastic composite components of the blade in a form of prefabricated elementary pieces; arranging the prefabricated elementary pieces in a mould for assembly by heating under pressure, the mould comprising a lower mould part and an upper mould part including complementary internal impressions having respectively the shape of the lower-surface skin and of the upper-surface skin of the blade, such that said prefabricated elementary pieces occupy, in the mould, the respective positions which they occupy in the blade; closing the mould and heating said prefabricated elementary pieces to a temperature sufficient to melt the thermoplastic matrix, under a pressure sufficient to ensure continuity of the thermoplastic matrix between said prefabricated elementary pieces and to assemble them by melting under pressure; cooling the mould to solidify the thermoplastic matrix and rigidify all the elementary pieces thus assembled; releasing the blade thus obtained from the mould; and attaching rings, by bonding or by crimping, around a blade root cuff attached around said blade root if said blade root is not made of thermoplastic composite and already assembled by melting under pressure with the other prefabricated elementary pieces of the blade.
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