Flapper valve assembly and method of flowing air therethrough
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16K-015/03
F16K-015/18
F01D-017/14
F02C-009/18
F01D-017/10
F02C-003/10
출원번호
US-0192979
(2014-02-28)
등록번호
US-9447894
(2016-09-20)
발명자
/ 주소
Leblanc, Andre
출원인 / 주소
PRATT & WHITNEY CANADA CORP.
대리인 / 주소
Norton Rose Fulbright Canada LLP
인용정보
피인용 횟수 :
0인용 특허 :
5
초록▼
A valve assembly for a gas turbine engine comprising two flappers movable independently from one another between an open position and a closed position; and a fairing disposed between the two flappers. The fairing has a portion extending downstream of the two flappers. The portion is a downstream po
A valve assembly for a gas turbine engine comprising two flappers movable independently from one another between an open position and a closed position; and a fairing disposed between the two flappers. The fairing has a portion extending downstream of the two flappers. The portion is a downstream portion of a substantially streamlined body. The two flappers are movable relative to the fairing, and when in the open position, the two flappers abut the fairing and form an upstream portion of the substantially streamlined body. A method of flowing air through a valve assembly for a gas turbine engine is also presented.
대표청구항▼
1. A valve assembly for a gas turbine engine, the valve assembly comprising: two flappers movable independently from one another between an open position and a closed position; anda fairing disposed between the two flappers, the fairing having first and second opposed sides, the fairing having a por
1. A valve assembly for a gas turbine engine, the valve assembly comprising: two flappers movable independently from one another between an open position and a closed position; anda fairing disposed between the two flappers, the fairing having first and second opposed sides, the fairing having a portion extending downstream of the two flappers when the flappers are in their open position, the portion being a downstream portion of a substantially streamlined body, the two flappers being movable relative to the fairing, and when in the open position, the two flappers are respectively nested into the first and second sides of the fairing and forming an upstream portion of the substantially streamlined body, the downstream portion of the streamline body extending in continuity downstream from the upstream portion formed by the flappers when in their open position, the fairing having an airfoil profile, and wherein a widest portion of the airfoil profile as defined between the first and second sides of the fairing is disposed downstream of a tip of the flappers relative to a fluid flow through the valve assembly. 2. The valve assembly as defined in claim 1, further comprising a base, the two flappers being independently hinged to the base, and the fairing being fixed to the base. 3. The valve assembly as defined in claim 1, wherein when in the open position, the two flappers form an angle comprised between 10 and 35 degrees. 4. The valve assembly as defined in claim 1, wherein a length of the fairing is at least a length of each of the flappers. 5. The valve assembly as defined in claim 1, wherein each of the two flappers is a half-disk. 6. The valve assembly as defined in claim 1, wherein a thickness of each the two flappers is smaller than a thickness of the fairing. 7. The valve assembly as defined in claim 1, wherein the fairing is made of aluminum alloy. 8. The valve assembly as defined in claim 1, wherein the widest portion of the airfoil profile is at the tip of the flappers. 9. The valve assembly as defined in claim 1, wherein when in the open position, the flappers are integrated with the fairing and form a substantially smooth continuous flow surface with the fairing, in their open position, the flappers being received in corresponding recesses defined in the first and second sides of the fairing. 10. The valve assembly as defined in claim 1, wherein in the closed position, the flappers are at 180 degrees from another. 11. The valve assembly as defined in claim 1, wherein in the closed position, an upstream portion of the fairing form the upstream portion of the streamlined body. 12. A method of flowing air through a valve assembly for a gas turbine engine, the method comprising, in sequence: moving two flappers of the valve assembly from a closed position to an open position as a result of a flow of air exerting a force thereon;nesting the flappers into corresponding recesses defined in opposed sides of a fairing having an airfoil profile and disposed between the flappers, a portion of the fairing extending downstream of the two flappers when the flappers assume their open position, the portion of the fairing being a downstream portion of a substantially streamlined body, and the two flappers abutting the fairing forming an upstream portion of the substantially streamlined body, a widest portion of the airfoil profile between the opposed sides of the fairing being disposed downstream of a tip of the flappers; andflowing the air along the substantially streamlined body. 13. The method as defined in claim 12, wherein moving the flappers from the closed position to the open position comprises moving the flappers from the first position where the flappers are at 180 degrees from another to the second position where the flappers form an angle smaller than 180 degrees. 14. The method as defined in claim 12, wherein moving the flappers from the closed position to the open position comprises moving the flappers from the first position to the second position where the flappers form an angle between 10 and 35 degrees from another. 15. The method as defined in claim 12, wherein moving the flappers of the valve assembly from the closed position to the open position comprises rotating the flappers from the closed position to the open position about hinges.
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이 특허에 인용된 특허 (5)
DeFrees Joseph H. (Warren PA), Air check valve assembly for powdered bulk product transport.
Fintescu, Ion; Gille, Laurent; Mourlan, Jean-Pierre Andre Joseph; Savarit, Matthieu, Device for regulating the flow rate of air feeding a turbine ventilation cavity of a turbomachine turbine section.
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