Composite material variable pitch blade for helicopter rotor and manufacturing process of such a blade
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B63H-001/26
F01D-005/14
출원번호
US-0271419
(1999-03-16)
우선권정보
FR0003542 (1998-03-23)
발명자
/ 주소
Besse Jean-Luc Christian,FRX
Gaffiero Jacques Joseph,FRX
출원인 / 주소
Eurocopter, FRX
대리인 / 주소
Piper Marbury Rudnick & Wolfe
인용정보
피인용 횟수 :
7인용 특허 :
9
초록▼
It concerns the making of a composite material blade according to the RTM process in which the casing cover, the spars and the anchoring reinforcements of the blade are respectively constituted from at least one fabric cut-out which includes at least two folds of intersecting carbon fiber fabric, th
It concerns the making of a composite material blade according to the RTM process in which the casing cover, the spars and the anchoring reinforcements of the blade are respectively constituted from at least one fabric cut-out which includes at least two folds of intersecting carbon fiber fabric, the folds being superposed on each other forming a pre-specified angle between them.
대표청구항▼
[ We claim:] [1.]1. A composite material blade, comprising: a part forming the blade foot for the connection to driving means and an aerodynamically profiled blade main section, said main blade section having at least one casing cover and two spars extending along the blade span and each located aga
[ We claim:] [1.]1. A composite material blade, comprising: a part forming the blade foot for the connection to driving means and an aerodynamically profiled blade main section, said main blade section having at least one casing cover and two spars extending along the blade span and each located against the casing cover, one against the intrados side and the other against the extrados side of the blade, the spars extending into the part forming the blade foot, the part forming the blade foot including anchoring reinforcements located on either side of each spar, wherein the casing cover, the spars and the anchoring reinforcements are respectively constituted from at least one fabric cut-out which includes at least two folds of intersecting carbon fiber fabric, the folds being superposed on each other forming a pre-specified angle between them, the casing cover, the spars and the anchoring reinforcements are each constituted from a stack of cut-outs of a first and/or a second type, the second type of cut-out includes four folds forming successive angles, equal in absolute value, to 45.degree., 0.degree. and 45.degree. between them, the blade includes, in the part forming the blade foot at least one incident cylindrical guide portion which comprises a filling body of light material on which are draped transverse stacks of cut-outs, which include, on the side of the blade end, two cut-outs of the first type oriented at 0.degree. and a cut-out of the first type oriented at 45.degree., and on the end of the cylindrical portion as well as on the side of the blade foot, a cut-out of the second type oriented at 45.degree., a connecting cut-out of the first type being stacked on the previous cut-out, extending in the direction of the blade foot, the incident guide portion comprises adjustment means for the static moment of the blade which include two crimped nuts on at least one face of said portion which is turned towards the blade foot, balancing plates being fixed, by screws, on the nuts. [13.]13. A composite material blade, comprising: a part forming the blade foot for the connection to driving means and an aerodynamically profiled blade main section, said main blade section having at least one casing cover and two spars extending along the blade span and each located against the casing cover, one against the intrados side and the other against the extrados side of the blade, the spars extending into the part forming the blade foot, the part forming the blade foot including anchoring reinforcements located on either side of each spar, wherein the casing cover, the spars and the anchoring reinforcements are respectively constituted from at least one fabric cut-out which includes at least two folds of intersecting carbon fiber fabric, the folds being superposed on each other forming a pre-specified angle between them, the casing cover, the spars and the anchoring reinforcements are each constituted from a stack of cut-outs of a first and/or a second type, the first type of cut-out includes two folds forming an angle equal to either 0.degree. or 90.degree., between them, the second type of cut-out includes four folds forming successive angles, equal in absolute value, to 45.degree., 0.degree. and 45.degree. between them, the blade includes, in the part forming the blade foot at least one incident cylindrical guide portion which comprises a filling body of light material on which are draped transverse stacks of cut-outs, which include, on the side of the blade end, two cut-outs of the first type oriented at 0.degree. and a cut-out of the first type oriented at 45.degree., and on the end of the cylindrical portion as well as on the side of the blade foot, a cut-out of the second type oriented at 45.degree., a connecting cut-out of the first type being stacked on the previous cut-out, extending in the direction of the blade foot.14. A blade according to claim 13, wherein the spars are constituted from a stack of two cut-outs of the first type, each cut-out forming an angle equal to 0.degree. with the span axis of the blade.15. A blade according to claim 13, wherein the casing cover includes a cut-out of the first type oriented at 45.degree. relative to the span axis of the blade.16. A blade according to claim 13, wherein the anchoring reinforcements comprise a stack of four cut-outs of the second type forming angles of 45.degree. between them.
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이 특허에 인용된 특허 (9)
Barbier Bruno J. M. (Val d\Oise FRX) Michaud-Soret Jean A. (Paris FRX), Blade of composite materials and its manufacturing process.
Bost Michel (Val-de-Marne FRX), Helicopter rotor blade made from a multispar composite material with torsion compartments and a process for manufacturin.
Gaffiero, Jacques; Amari, André; Rinaldi, Bénédicte; Trallero, Didier, Fabricating parts with composite material reinforcement having a single crossing line.
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