Trailing edge split flap with pneumatic actuation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B64C-003/50
B64C-009/16
출원번호
US-0187634
(2011-07-21)
등록번호
US-8870125
(2014-10-28)
발명자
/ 주소
Balzer, Michael A.
Santini, Gregory M.
Klein, Michael K.
출원인 / 주소
The Boeing Company
대리인 / 주소
Ostrager Chong Flaherty & Broitman P.C.
인용정보
피인용 횟수 :
3인용 특허 :
2
초록▼
A system for pneumatically actuating a split flap hingedly mounted near or at a trailing edge of an airfoil. The system includes a bladder system disposed between the split flap and the upper surface of the airfoil. The split flap is a small-chord (usually 1-3% of total wing chord) long-span lower p
A system for pneumatically actuating a split flap hingedly mounted near or at a trailing edge of an airfoil. The system includes a bladder system disposed between the split flap and the upper surface of the airfoil. The split flap is a small-chord (usually 1-3% of total wing chord) long-span lower panel which separates from the airfoil trailing edge by means of a hinge or a flexible lower skin. Deployment of the split flap is actuated pneumatically by the inflatable bladder system. The split flap may exist at a fixed wing trailing edge, a moving flap trailing edge, or an empennage trailing edge. The pneumatic bladder provides distributed force to extend and retract the split flap. This pneumatic approach eliminates extra drag, reduces cost and weight, and lessens flutter concerns.
대표청구항▼
1. An apparatus comprising: an airfoil having upper and lower surfaces;a hinge attached to said lower surface;a deployable flap attached to said hinge and extending in a spanwise direction, said flap being rotatable about an axis of said hinge between an undeflected angular position in which said fl
1. An apparatus comprising: an airfoil having upper and lower surfaces;a hinge attached to said lower surface;a deployable flap attached to said hinge and extending in a spanwise direction, said flap being rotatable about an axis of said hinge between an undeflected angular position in which said flap is aligned with said lower surface, a partially deployed angular position in which said flap is deflected at a first angle relative to said lower surface, and a fully deployed angular position in which said flap is deflected at a second angle relative to said lower surface, said second angle being greater than said first angle; anda bladder system comprising first and second bays which are individually inflatable and adjacent to each other, said first and second bays being disposed inside said airfoil between a portion of said flap and said upper surface when said flap is in said undeflected position,wherein said flap will be in said undeflected position when said first and second bays are deflated, in said partially deployed position when said first bay is inflated and said second bay is deflated, and in said fully deployed position when said first and second bays are both inflated. 2. The apparatus as recited in claim 1, wherein said bladder system is made of a collapsible fiber-reinforced material. 3. The apparatus as recited in claim 1, wherein said first bay ceases to expand in response to internal air pressure when a predetermined volume is attained. 4. The apparatus as recited in claim 1, further comprising a source of pressurized air, an air inlet tube for carrying pressurized air from said pressurized air source to said second bay, a valve installed between said pressurized air source and said air inlet tube, and a controller programmed to activate said pressurized air source and to open said valve in response to a command, thereby inflating said second bay. 5. The apparatus as recited in claim 1, further comprising a source of pressurized air, first and second valves in fluid communication with said pressurized air source, first and second air inlet tubes in fluid communication with said first and second valves respectively and with said first and second bays respectively, and a controller programmed to activate said pressurized air source and to open said first and second valves in response to a command, thereby supplying pressurized air to said first and second bays. 6. The apparatus as recited in claim 5, further comprising first and second pressure transducers which detect the internal pressure in said first and second bays respectively, wherein said controller is further programmed to close said first valve in response to a signal from said first pressure transducer indicating that said first bay is not inflating and to close said second valve in response to a signal from said second pressure transducer indicating that said second bay is not inflating. 7. The apparatus as recited in claim 1, further comprising a source of pressurized air, a directional valve connected to receive pressurized air from said pressurized air source, an air distribution system that distributes air to inflate said first and second bays when said pressurized air source is activated and said directional valve is in a state that directs the pressurized air to said air distribution system, and a venturi connected to said directional valve and said air distribution system, wherein pressurized air in said first and second bays escapes via said venturi to deflate said first and second bays when said pressurized air source is activated and said directional valve is in a state that directs the pressurized air to said venturi instead of to said air distribution system. 8. The apparatus as recited in claim 1, wherein said bladder system further comprises third and fourth bays which are individually inflatable and adjacent to each other, said third and fourth bays being disposed between said flap and said upper surface, and said apparatus further comprises first and second sources of pressurized air each capable of operating independently, said first pressurized air source being′connected to supply pressurized air to said first and second bays, and said second pressurized air source being connected to supply pressurized air to said third and fourth bays. 9. The apparatus as recited in claim 8, wherein said first and second bays are separated by a first spanwise septum, said third and fourth bays are separated by a second spanwise septum, said first and third bays are separated by a first chordwise septum, and said second and fourth bays are separated by a second chordwise septum. 10. The apparatus as recited in claim 1, wherein said airfoil further comprises a trailing edge having a lower surface, said flap being aligned with said lower surface of said trailing edge when said flap is in said undeflected position. 11. The apparatus as recited in claim 1, wherein said airfoil is one of the following: a flight control surface, a wing or a horizontal stabilizer.
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이 특허에 인용된 특허 (2)
Sepstrup James L. (King County WA), Aircraft wings with aileron-supported ground speed spoilers and trailing edge flaps.
Schlipf, Bernhard; Hue, Xavier, High lift component for an aircraft, high lift system, method for adjusting the high lift characteristics of an aircraft and aircraft.
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