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특허 상세정보

Rotor system having alternating length rotor blades and positioning means therefor for reducing blade-vortex interaction

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-011/28   
미국특허분류(USC) 416/087 ; 416/089 ; 416/203 ; 415/119
출원번호 US-0569390 (1995-12-11)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Collins
인용정보 피인용 횟수 : 18  인용 특허 : 3
초록

A Variable Diameter Rotor (VDR) system (4) having telescoping odd and even blade assemblies (O.sub.b, E.sub.b) wherein the odd blade assemblies define a radial length R.sub.O and the even blade assemblies define a radial length R.sub.E. Each blade assembly (O.sub.b, E.sub.b) defines an internal chamber (64) for accepting a positioning means (70) operative to effect telescopic translation of the blade assemblies (O.sub.b, E.sub.b) such that the radial length R.sub.E of the even blade assemblies (E.sub.b) is equal to the radial length R.sub.O of the odd bl...

대표
청구항

[ What is claimed is:] [13.] A Variable Diameter Rotor system (4) for rotorcraft and operative to reduce Blade-Vortex Interaction (BVI) noise, said rotorcraft operating in first, second and third operating modes, comprising:a rotor hub assembly (6) defining an axis of rotation (8) about which said rotor hub assembly (6) rotates;odd and even blade assemblies (O.sub.b, E.sub.b) mounting to and rotating with said rotor hub assembly (6), each of said rotor blade assemblies (O.sub.b, E.sub.b) having inboard and outboard blade sections (10, 12) defining an int...

이 특허를 인용한 특허 피인용횟수: 18

  1. Bogrash, Philip. Cycloidal rotor with non-circular blade orbit. USP2013098540485.
  2. Henze, Chad M.; Shannon, Daniel W.; Schlinker, Robert Hans. Differential blade design for propeller noise reduction. USP2017079714575.
  3. Podgurski, Daniel M.. Disc rotor retraction system. USP2014078784057.
  4. Hager Lee N.. Drive system for a variable diameter tilt rotor. USP2000026030177.
  5. Dehlsen, James G. P.. Mechanism for extendable rotor blades for power generating wind and ocean current turbines and means for counter-balancing the extendable rotor blade. USP2005086923622.
  6. Byrnes, Francis E.; Fallon, William P.. Method and apparatus for fiber strap termination. USP2003066578793.
  7. Betzina, Mark D.; Nguyen, Khanh Q.. Method and system for active noise control of tiltrotor aircraft. USP2003126671590.
  8. Benito, Pedro L.; Wang, Jing. Method and system for operating a wind turbine generator. USP2011087988414.
  9. Herpin, Gilles. Method of reducing or even eliminating the vibration of a rotorcraft lift and propulsion rotor, and an airfoil assembly and a rotor implementing said method. USP2013118579587.
  10. Antonios N. Kotoulas ; Charles Berezin ; Michael S. Torok ; Peter F. Lorber. Neural net controller for noise and vibration reduction. USP2002126493689.
  11. Kotoulas, Antonios N.; Berezin, Charles; Torok, Michael S.; Lorber, Peter F.. Neural net controller for noise and vibration reduction. USP2004066751602.
  12. Gerbino,Allen J.. Retractable lifting blades for aircraft. USP2009017475847.
  13. Gerbino,Allen J.. Retractable lifting blades for aircraft. USP2006027004427.
  14. Mikhail, Amir S.; Deane, Geoffrey F.. Retractable rotor blades for power generating wind and ocean current turbines and means for operating below set rotor torque limits. USP2004046726439.
  15. Daniel A. Wachspress ; Todd R. Quackenbush. Rotor blade with optimized twist distribution. USP2002126497385.
  16. Shi,Quan Guan. Rotor blades for a toy helicopter. USP200703D539358.
  17. Hager Lee N. ; Fitzgerald Paul C.. Variable diameter rotor blade actuation system. USP2000026019578.
  18. Wilson,Kitchener Clark. Wind flow estimation and tracking using tower dynamics. USP2008017317260.