[특허]System for damping lead-lag motion of rotor blades of helicopter

[미국특허] System for damping lead-lag motion of rotor blades of helicopter 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B64C-027/38
출원번호	US-0269365 (1988-11-10)
우선권정보	JP-0283742 (1987-11-10)
발명자 / 주소	Sato Tetsuro (Tokyo JPX)
출원인 / 주소	Fuji Jukogyo Kabushiki Kaisha (Tokyo JPX 03)
인용정보	피인용 횟수 : 11 인용 특허 : 10

초록 ▼

A helicopter rotor blade supported by a flexbeam to be rotatable about an axis of rotation, in which a pitching motion thereof is allowable, is provided with a device for changing the pitch and damping the lead-lag motion thereof. The device comprises a bushing in a through hole formed at the inboard end of the flexbeam, an elastomeric pivot loosely fitted in the bushing, elastomeric dampers of cylindrical shape mounted on the upper and lower surfaces of the flexbeam and coupled with the upper and lower ends of the elastomeric pivot by means of nuts, and torque arms extending through the bushing and the elastomeric dampers and having the central portion thereof connected to central shafts of the elastomeric pivots. Each of the torque arms has both ends outwardly projecting beyond the elastomeric dampers and secured to a pitch sleeve which encloses the flexbeam. Therefore,the relative position between the pitch sleeve and the elastomeric pivot does not change even when lead-lag motion is imparted to the rotor blade.

대표청구항 ▼

A system for damping lead-lag motion of rotor blades of a helicopter, which comprises a central mast rotated by a power source, at least two flexbeams each connected with the central mast at an inboard portion thereof to rotate about the rotational axis of the central mast and secured to one of the rotor blades at an outboard end thereof, pitch sleeve means secured at one end thereof to the rotor blade to enclose each of the flexbeams, said pitch sleeve means having a substantially elliptical cross section, pitch change means for changing the pitch of the rotor blades by moving the pitch sleeve means, and damping means for damping the lead-lag motion of the rotor blades, wherein the damping means comprises: at least one torque arm coupled with the pitch sleeve means at upper and lower sides of the pitch sleeve means; an elastomeric pivot having at least one central shaft supported by the torque arm, said elastomeric pivot also having upper and lower extensions; and elastomeric dampers mounted on upper and lower surfaces of each of the flexbeams at one end portions thereof and fastened to the upper and lower extensions of the elastomeric pivot at the other end portions thereof, respectively, to damp the lead-lag motion of the rotor blade so as to prevent changing of relative positional relationship between the pitch sleeve means and the elastomeric pivot even when change of relative positional relationship occurs between the flexbeam and the pitch sleeve means by the operation of the pitch change means.

이 특허에 인용된 특허 (10) 인용/피인용 타임라인 분석

Niwa Yoshiyuki (Tachikawa JPX) Kashiwagi Masahiro (Tachikawa JPX) Yasue Masahiro (Funabashi JPX) Bandoh Shunichi (Kakamigahara JPX) Kakinuma Asao (Kakamigahara JPX) Wakatsuki Tadashi (Gifu JPX), Bearingless hub structure for rotary-wing aircrafts.
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Ferris ; Donald Leroy, Cross beam rotor.
상세보기
Ferris Donald L. (Newtown CT) Ogle Peter C. (Woodbridge CT), Cross beam rotor.
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Rybicki ; Robert Charles, Cross beam rotor.
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Noehren William L. (Huntington CT) Ferris Donald L. (Newtown CT) Ogle Peter C. (Woodbridge CT), Cross-beam helicopter rotor with readily replaceable snubber.
상세보기
Head, Robert E.; Banerjee, Debashis, Helicopter tail rotor of the elastomerically-mounted composite flexbeam type.
상세보기
Cheney ; Jr. Marvin C. (Glastonbury CT), Matched stiffness rotor flexbeam and blade system.
상세보기
Hahn Michael (Ottobrunn DEX) Kuntze-Fechner Gerald (Bad Wiessee DEX), Rotor structure, especially for a rotary wing aircraft.
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Hahn Michael (Ottobrunn DEX) Kuntze-Fechner Gerald (Bad Wiessee DEX), Rotor structure, especially for rotary wing aircraft.
상세보기
Metzger Robert W. (Hurst TX) Neathery William D. (Fort Worth TX) Reyes Peter A. (Watauga TX) Tisdale Patrick R. (Bedford TX) Covington Cecil E. (Hurst TX) Broekhuizen Willem (Arlington TX), Soft inplane bearingless helicopter rotor.
상세보기

이 특허를 인용한 특허 (11) 인용/피인용 타임라인 분석

Kuntze-Fechner, Gerald; Bauer, Markus; Ortner, Martin, Aerodynamic blade attachment for a bearingless rotor of a helicopter.
상세보기
Doolin Leonard J. ; Poulin Stephen V., Apparatus and method for adjusting rotor blade tracking.
상세보기
Kuntze-Fechner, Gerald; Bauer, Markus; Ortner, Martin, Blade attachment for a bearingless rotor of a helicopter.
상세보기
Kuntze-Fechner, Gerald; Bauer, Markus; Ortner, Martin, Connection joint for attaching an airfoil blade to a helicopter's bearingless main rotor.
상세보기
Halladay James R., Curable compositions having high amount of antiozonant and an article made therefrom.
상세보기
Meyer, Leon M.; Lay, Richard C.; Schmaling, David N., Elastomeric bearing system motion limiter.
상세보기
Jones, Peter J.; Seitter, Eric J., Flexbeam damper assembly having transition shim clamp device.
상세보기
Jones Peter J., Fluid damper including flexible damping plate.
상세보기
Carter ; Jr. Jay W., Rotor for rotary wing aircraft.
상세보기
Kuntze-Fechner, Gerald; Bauer, Markus, Separable blade attachment for a bearingless rotor of a helicopter.
상세보기
Schmaling, David N.; Milne, Robert, Snubber-vibration damper system for a bearingless main rotor.
상세보기

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

연합인증

[미국특허] System for damping lead-lag motion of rotor blades of helicopter 원문보기