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    • 29. 发明授权
    • Variable geometry exhaust nozzle for a turbine engine
    • 用于涡轮发动机的可变几何排气喷嘴
    • US5833140A
    • 1998-11-10
    • US764420
    • 1996-12-12
    • Constantino V. LoffredoCharles J. Szyszko
    • Constantino V. LoffredoCharles J. Szyszko
    • B64D33/04F02C7/00F02K1/09F02K1/11B64C15/02
    • F02K1/11Y02T50/671
    • A variable exhaust nozzle (26) for a turbine engine nacelle (16) includes a pair of semi-cowls (58, 60) disposed about a longitudinally extending central axis (14) and a pair of corresponding shells (36, 38) each of which is spaced radially inwardly from the corresponding semi-cowl and is pivotable about a pivot axis (42, 44) between an extended position and a retracted position. The semi-cowls and shells have curved, geometrically similar inner and outer surfaces (86, 100) respectively so that gap (108) between the shells and the cowl is uniform irrespective of the angular orientation of the shells. A seal (128) which includes longitudinally extending legs (128a, 128b) and an optional circumferential leg (128c) prevents detrimental air leakage. Pivotal movement of the shells effects large changes in the discharge area A.sub.D of the nozzle without compromising the external aerodynamic characteristics of the nacelle. In one embodiment of the invention, each shell includes an extension (110) which facilitates the attainment of large area changes. The radial uniformity of gap (108) contributes to the durability and simplicity of the seal by ensuring that the seal is not repeatedly compressed and relaxed during operation of the nozzle.
    • 用于涡轮发动机舱(16)的可变排气喷嘴(26)包括围绕纵向延伸的中心轴线(14)和一对相应的壳体(36,38)设置的一对半罩(58,60),每对 其从对应的半罩面径向向内间隔开,并且可在延伸位置和缩回位置之间绕枢转轴线(42,44)枢转。 半罩和贝壳分别具有弯曲的,几何相似的内表面和外表面(86,100),使得壳和罩之间的间隙(108)均匀,而与壳的角取向无关。 包括纵向延伸的腿部(128a,128b)和任选的圆周腿部(128c)的密封件(128)防止有害的空气泄漏。 壳体的枢转运动在喷嘴的排放面积AD上产生大的变化,而不损害机舱的外部空气动力特性。 在本发明的一个实施例中,每个壳包括有助于实现大面积变化的延伸部(110)。 间隙(108)的径向均匀性通过确保在喷嘴操作期间密封件不被重复压缩和松弛而有助于密封件的耐久性和简单性。
    • 30. 发明授权
    • Turbine engine equipped with thrust reverser
    • 涡轮发动机配有推力反向器
    • US5666802A
    • 1997-09-16
    • US501116
    • 1995-09-08
    • Jean-Pierre Lair
    • Jean-Pierre Lair
    • F02K1/06F02K1/11F02K1/38F02K1/60F02K3/06
    • F02K1/06F02K1/11F02K1/386F02K1/60Y02T50/672
    • A thrust reverser system for a turbine engine of the type having a central relatively hot gas generator nozzle conducting a core flow and a relatively cold duct conducting a fan flow and surrounding the hot flow, a pair of thrust reverser door, each of the doors being pivotally mounted on an axis which is substantially diametrically positioned with respect to the exhaust nozzle of the engine so as to pivot between a stowed position in which the doors are out of the direct path of exhaust from the engine and a deployed position in which the doors are in the path of the engine exhaust for deflecting the exhaust and creating a braking thrust, a flow modifying arrangement acting on the hot gas generator nozzle for simultaneously decreasing the total pressure of the core flow and increasing the total pressure of the fan flow by increasing the area of the hot gas generator nozzle at the discharge end thereof and moving the boundary between the hot gas and cold gas flows radially outwardly.
    • PCT No.PCT / US94 / 01575 Sec。 371日期1995年9月8日 102(e)1995年9月8日PCT PCT 1994年2月8日PCT公布。 第WO94 / 18446号公报 日期1994年8月18日一种用于涡轮发动机的推力反向器系统,其具有导向芯流的中心相对较热的气体发生器喷嘴和导致风扇流并围绕热流的相对冷的管道,一对推力反向器门, 每个门枢转地安装在相对于发动机的排气喷嘴基本上直径定位的轴线上,以便在收起的位置之间枢转,在该收起位置之间的门从发动机的直接排出路径排出, 门处于发动机排气路径中以使排气偏转并产生制动推力的位置,作用在热气体发生器喷嘴上的流动改变装置,用于同时降低核心流量的总压力并增加总压力 通过增加热气体发生器喷嘴在其排出端处的面积并使热气体与冷气体流动之间的边界流动 向外。