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    • 2. 发明授权
    • Variable area bypass injector
    • 可变区域旁路注射器
    • US5343697A
    • 1994-09-06
    • US98994
    • 1993-07-29
    • Kenneth L. JohnsonDonald M. CorsmeierWilliam L. WeaverEric H. Lewis
    • Kenneth L. JohnsonDonald M. CorsmeierWilliam L. WeaverEric H. Lewis
    • F02C7/28F02C9/16F02C9/18F02K3/075F02K3/02
    • F02K3/075F05D2250/34
    • A variable area bypass injector (VABI) for a variable cycle gas turbine engine includes a circumferentially continuous valve with a conical surface sloping into a screech suppressor surface, a circumferentially segmented seal attached to the diffuser, and a valve actuator located outside the outer duct of the engine. Each seal segment is spring loaded to allow for different axial movement between circumferentially adjacent segments, and has a seat portion complimentary to the valve conical surface for sealingly engaging the valve when in closed position. Additionally, the seal segments are shaped with a low aerodynamic profile and cooperate with the VABI conical surface, when the valve is in an open position, to provide an annular conic channel that keeps the bypass flow attached to the VABI valve and core flowpath walls as it is injected into the core gas stream. Inner and outer crank arms transfer linear motion from the actuator through the outer duct wall, cooperating with idler arms to translate the valve and screech suppressor axially between open and closed valve positions.
    • 用于可变循环燃气涡轮发动机的可变区旁路喷射器(VABI)包括周向连续的阀,其具有倾斜成尖锐抑制器表面的锥形表面,附接到扩散器的周向分段密封件,以及位于外部管道外侧的阀致动器 引擎。 每个密封段被弹簧加载以允许在周向相邻的段之间的不同的轴向运动,并且具有与阀锥形表面互补的座部分,用于在处于关闭位置时密封地接合阀。 另外,当阀处于打开位置时,密封段成形为具有低空气动力学轮廓并与VABI锥形表面配合,以提供环形圆锥通道,其将旁路流量保持在VABI阀和芯流路壁上,如 将其注入到核心气流中。 内部和外部曲柄臂从致动器通过外部管道壁传递线性运动,与空转臂配合,以在打开和关闭的阀门位置之间轴向平移阀门和尖叫抑制器。