[특허]Apparatus and method for adjusting rotor blade tracking

[미국특허] Apparatus and method for adjusting rotor blade tracking 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B64C-027/51
출원번호	US-0155921 (1993-11-22)
발명자 / 주소	Doolin Leonard J. Poulin Stephen V.
출원인 / 주소	United Technologies Corporation
대리인 / 주소	McAulay Fisher Nissen, Goldberg & Kiel
인용정보	피인용 횟수 : 19 인용 특허 : 45

초록 ▼

A helicopter rotor has two or more blades which extend from a hub and has an adjustment mechanism for adjusting the lead/lag variation of the blades which typically occur due to manufacturing tolerance variations or to changes which occur through operation such as softening of the supporting elastomer dampers. One embodiment of the invention incorporates an end plate on an upper damper with a lug positioned adjacent to a lug on the torque tube such that the end plate of the damper can be changed relative to the longitudinal axis of the blade. For example, a .+-.1/2 degree adjustment can be made in the blade angle relative to the hub to insure that lead/lag errors are reduced. In another embodiment, the damper set includes extended metal shims adjacent to the end most laminate plys of the upper and lower dampers such that these shims can be bolted to the end plates of the snubber assemblies for step increasing the stiffness of the assemblies. Utilizing the apparatus of the invention, each blade of the rotor can be adjusted to balance the rotor assembly to minimize vibration.

대표청구항 ▼

[ We claim:] [1.] A helicopter rotor comprising flexible spar means, hub means retaining the spar means, a plurality of blades extending from the spar means, torque tube means associated with each blade, upper and lower damper means disposed on opposite sides of the flexible spar means for transmitting pitch control changes to the spar means from the torque tube means, and, adjustment means for adjusting the angular relationship of the flexible spar means to the hub means to correct tracking errors, the adjustment means comprising first and second end plates associated with the upper and lower damper means, and positioning means for adjusting the position of at least one of said end plated relative to the torque tube means to adjust the position of the spar means relative to an axis of the torque tube means. [6.] A helicopter rotor comprising flexible spar means, hub means retaining the spar means, a plurality of blades extending from the spar means, torque tube means associated with each blade, upper and lower damper means disposed on opposite sides of the flexible spar means for transmitting pitch control change to the spar means from the torque tube means, and, adjustment means for adjusting the angular relationship of the flexible spar means to the hub means to correct tracking errors, each upper and lower damper means having an end plate for attachment of the respective damper means to the torque tube means, each damper means has a plurality of elastomeric plies with interleaved non-extensible shims, the outermost shim of each damper means located adjacent to its respective end plate, having an extending portion and including means for affixing to the respective and plate whereby attachment of one of the outermost shims or both of the outermost shims to the respective end plate sandwiches an end elastomeric ply therebetween to adjust the stiffness of the overall damper assembly.

이 특허에 인용된 특허 (45) 인용/피인용 타임라인 분석

Ferris Donald L. (Newtown CT), Accommodating axial load in an elastomeric high torque, constant velocity joint.
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Matuska David G. (Beacon Falls CT) Ferris Donald L. (Newtown CT), Apparatus for damping helicopter rotor blade oscillations.
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Weiland Emil (Hohenbrunn DT) Schwarz Alois (Putzbrunn DT) Frommlet Hubert (Munich DT), Blade connection for helicopter rotor blades.
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Aubry Jacques A. (Bouches-du-Rhne FRX) Mondet Jean J. (Bouches-du-Rhne FRX), Combined bearing device for a rotorcraft rotor and a rotor equipped with such a bearing device.
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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.
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Waddington Alan (Somerton GB2) Martin Alfred C. (Shepton Mallet GB2), Damper means for helicopter rotors.
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Frommlet Hubert (Siegertsbrunn DEX) Stangl Ludwig (Garching DEX), Damping device for a helicopter rotor blade.
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Leman Jean-Luc (Aix en Provence FRX) Suzzi Robert J. (Marseille FRX), Device incorporating retractable stops for limiting the flappings of the blades of the main rotor of a rotorcraft.
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Desjardins Rene A. (Media PA), Drive shaft and rotor hub for helicopter flexible rotor system.
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Nakano Hideaki (Kobe JA) Ozu Tadahiro (Kobe JA) Okayama Takashi (Kobe JA), Elastic coupling.
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McCafferty Hugh A. (Upper Darby PA), Elastomeric bearing for helicopter rotor having lead-lag damping.
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Brunsch ; Klaus ; Weiland ; Emil, Elastomeric damping arrangement.
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Reyes Peter A. (Watauga TX) Finney Robert H. (Arlington TX), Elastomeric system for mounting a helicopter rotor.
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Byrnes Francis E. (White Plains NY), Equalizing stress distribution in each laminate of an asymmetrically loaded elastomeric bearing.
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Reichert Gerhard (Coburg DEX) Riedel Friedrich (Redwitz DEX), Fan wheel for radial fan.
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Bost Michel (Joinville le Pont FRX) Chasson Alain (Villeneuve La Garenne FRX), Fastening device including sleeves, and rotor blade equipped with such a device for fastening to a hub.
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Byrnes Francis E. (White Plains NY) D\Anna Frank P. (Seymour CT), Flexbeam helicopter rotor with improved snubber-vibration damper between the torque tube and the flexible spar member.
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Clinard ; Jr. ; Ralph L., Frustroconical laminated bearing.
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Miller Gordon G. (Shelton CT), Helicopter gimbal rotor.
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Mouille Rene L. (Aix-en-Provence FRX), Helicopter rotor.
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Mouille Rene L. (Aix-en-Provence FRX), Helicopter rotor.
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Pariani Emilio (Cardano al Campo ITX), Helicopter rotor.
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Martin Alfred C. (Shepton Mallet GB2), Helicopter rotors.
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Vincent, Alan H., Helicopter rotors.
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Watson ; Kenneth, Helicopter rotors.
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Byrnes Francis E. (White Plains NY) Schmaling David N. (Oxford CT), Hybrid helicopter rotor hub retention plate.
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Finney Robert H. (Erie PA), Laminated bearing.
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Peterson Robert R. (Hudson MA), Laminated bearing structures.
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Finney ; Robert H., Laminated bearing with plural modulus layer.
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Peterson Robert R. (Hudson MA) Ventura Daniel S. (Malden MA), Laminated bearings having elastomer layers of varying dimensions.
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Schmidt Warren E. (Erie PA), Link-type rotary coupling.
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Markowski Edwin P. (Medfield MA), Motion snubber.
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Robinson Madison K. (Bedford TX), Pitch change bearing system.
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Hibyan Edward S. (Trumbull CT), Preloaded tunable elastomeric flapping hinge bearing and method of preloading.
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McGuire Dennis P. (Erie PA), Propeller assembly.
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McGuire Dennis P. (Erie PA), Rotary energy storage device.
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Guimbal Bruno (Chateauneuf-les-Martigues FRX), Rotary-wing aircraft rotor head having resilient-return interblade ties with built-in damping.
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McGuire Dennis P. (Erie PA), Rotor blade retention system.
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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.
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Covington Cecil E. (Hurst TX) Snyder David E. (Arlington TX) Sonneborn Walter G. (Fort Worth TX) Cresap Wesley L. (Fort Worth TX), Soft inplane helicopter rotor.
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Sato Tetsuro (Tokyo JPX), System for damping lead-lag motion of rotor blades of helicopter.
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Byrnes Francis E. (White Plains NY) Ferris Donald L. (Newtown CT) Olsen Eric G. (Woodbury CT), Tailoring tilt in an elastomeric high torque, constant velocity joint.
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Inuzuka ; Yutaka, Vibration control bush assembly.
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Le Pierres Gildas (La Ferte Alais FRX), Vibration damper and in particular frequency adapter for a helicopter blade.
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이 특허를 인용한 특허 (19) 인용/피인용 타임라인 분석

Halcom, Lance; Baskin, Bryan Kenneth; D'Anna, Frank P.; Darrow, David A.; Hunter, David H., Adjustable scissor control link.
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Jarrett, Chad Lewis; Stamps, Frank Bradley; Shimek, Glenn, Articulated main rotor hub with inwardly CF bearing and 3% flapping hinge offset.
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Stamps, Frank B.; Rauber, Richard, CF bearing with steady pitching moment.
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Bohm, Anthony Carl, Combination spherical and laminated bearing assembly.
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D'Anna, Frank P.; Darrow, Jr., David A., Constant velocity drive for tilt rotor assembly.
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Bauchot, Frederic; Clement, Jean-Yves; Truntschka, Carole, Cyclic blade speed control.
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Bauchot, Frederic; Clement, Jean-Yves; Truntschka, Carole, Cyclic blade speed control apparatus and method.
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Meyer, Leon M.; Lay, Richard C.; Schmaling, David N., Elastomeric bearing system motion limiter.
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Jones, Peter J.; Seitter, Eric J., Flexbeam damper assembly having transition shim clamp device.
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Kopanski, Kris; Cowles, Devon; Bruno, David E.; Miner, Frederick J.; Hein, Benjamin Reed, Flexbeam hinge for helicopter blade active trailing edge flap.
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Sahasrabudhe, Vineet; Gold, Philip J., Fly-by-wire flight control system with electronic lead/lag damper algorithm.
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Bauchot, Frederic; Clement, Jean-Yves; Truntschka, Carole, Hydraulic cyclic blade speed control apparatus and method.
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Ferrant, Matthieu; Legrand, Mathieu, Laminated abutment, a rotor provided with such an abutment, and an aircraft.
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Dempsey, Patrick J.; White, Matthew A.; Kellner, Aaron; King, Joshua, Relative acceleration blade position measurement.
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Davis, Hunter; Stamps, Frank B., Rotor hub bearing system.
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Schmaling, David N.; Milne, Robert, Snubber-vibration damper system for a bearingless main rotor.
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Schmaling, David N.; D'Anna, Frank P., Stiff inplane elastomeric rotorhead.
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Stille, Brandon L.; Welsh, William A.; Lauder, Timothy Fred, System and method of damping a 1P motion.
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Toni, Darryl Mark; Kassapoglou, Christos; Sauer, Jeffrey George; Hornbaker, Darrel Duane, Transmission support structure for a rotary wing aircraft.
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[미국특허] Apparatus and method for adjusting rotor blade tracking 원문보기