Variable-pitch multi-blade propeller incorporating individually dismountable blades made of composite materials, process
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B64C-027/45
B64C-011/00
출원번호
US-0587649
(1984-03-08)
우선권정보
FR-0004448 (1983-03-18)
발명자
/ 주소
Mouille RenL. (Bouches-du-Rhne FRX) Declerco Marc (Bouches-du-Rhne FRX) Jalaguier Jean-Pierre (Bouches-du-Rhne FRX) Jaugey Bernard (Bouches-du-Rhne FRX)
출원인 / 주소
Societe Nationale Industrielle et Aerospatiale (Paris FRX 07)
인용정보
피인용 횟수 :
20인용 특허 :
5
초록▼
Each blade is fixed to the hub by the root part of the spar, arranged in the form of a loop surrounding a connection element bolted on the hub, with the interposition of rigid rings by a pin simultaneously fixing the hub on a drive sleeve transmitting thereto the driving torque of the central shaft.
Each blade is fixed to the hub by the root part of the spar, arranged in the form of a loop surrounding a connection element bolted on the hub, with the interposition of rigid rings by a pin simultaneously fixing the hub on a drive sleeve transmitting thereto the driving torque of the central shaft. The hub comprises two coaxial cylindrical walls in each of which is pierced, for each blade, a circular opening in which the member for controlling the angle of attach which is fast with the blade root is mounted to rotate via self-lubricating rings. The invention is particularly applicable to helicopters.
대표청구항▼
In a variable-pitch multi-blade propeller intended in particular to be used as tail rotor of a rotorcraft, and comprising: a central shaft driven in rotation about a central axis, a hub rotating with said central shaft about said axis, blades, preferably in an odd number, each comprising a shell wit
In a variable-pitch multi-blade propeller intended in particular to be used as tail rotor of a rotorcraft, and comprising: a central shaft driven in rotation about a central axis, a hub rotating with said central shaft about said axis, blades, preferably in an odd number, each comprising a shell with aerodynamic profile constituted by at least one layer of fiber fabrics with high mechanical resistance rigidified by a polymerized synthetic resin for impregnation, and having an inner end which extends by a blade root, a filling body made of cellular or foam synthetic material disposed in said shell, a spar having a longitudinal axis substantially parallel to that of said blade and constituted by a single elongated leaf of fibers with high mechanical resistance agglomerated by a polymerized synthetic resin, of which the major part is fixed in said shell and of which one inner end part, emerging from said shell on passing through said blade root, forms a twistable and flexible root part by which said spar is connected to said hub, said blade root being fast with a pitch control member which is adapted to exert on said shell a torsional moment, substantially centred on said spar longitudinal axis, when said pitch control member is actuated by an assembly for collectively controlling the pitch of said blades, and which is mounted to rotate in said hub about said blade longitudinal axis and wherein (a) each blade is individually connected to said hub by said spar root part which is arranged in the form of a loop having an inner end surrounding a single connection element bolted on said hub, (b) said hub has, for each said blade, two axially extending parts which are radially spaced apart from each other, and in each of which there is an opening which is coaxial with the opening of the other hub part, and (c) said blade pitch control member is rotatably mounted in said two coaxial openings.
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이 특허에 인용된 특허 (5)
Grimes Richard V. (Piqua OH) Harlamert W. Benjamin (Piqua OH) Thompson David F. (Chester PA), Air craft propeller assembly with composite blades.
Duret Maurice L. (Aix-en-Provence FRX) Lamarche Bernard L. J. (Velaux FRX) Declercq Marc A. (Pelissanne FRX) Martin Robert D. (Aix-en-Provence FRX), Multi-blade propellers.
Posva, David, Aircraft having the ability for hovering flight, fast forward flight, gliding flight, short take-off, short landing, vertical take-off and vertical landing.
Marze Henri-James R. (Rognac FRX) Routhieau Vincent J. L. (Aix-En-Provence FRX) Arnaud Gilles L. (Marseille FRX) Arnaud Remy E. (Vitrolles FRX), Counter-torque device with ducted rotor and phase modulation of the blades, for helicopter.
Barquet Henri F. (Chateauneuf-les-Martigues FRX) Arnaud Remy E. (Vitrolles FRX), Flow-straightener vane for counter-torque device with ducted rotor and ducted flow-straightening stator, for helicopter.
Legendre Philippe Maurice Rene,FRX ; Manfredotti Thomas Pierre Louis,FRX ; Antomarchi Philippe Maurice Paul,FRX, Hingeless rotor with intermediate pitch-control rings.
Marze, Henri-James, Method of optimizing a ducted anti-torque rotor of a rotorcraft, in particular a helicopter, to minimize acoustic annoyance, and a ducted anti-torque rotor obtained thereby.
Rochegude, Bernard; Hirsch, Jean-Francois, Rotorcraft blade provided with a radial segment and with at least one forwardly- and/or rearwardly-swept segment.
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