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    Variable area nozzle for gas turbine engines driven by shape memory alloy actuators
    1.
    发明授权
    Variable area nozzle for gas turbine engines driven by shape memory alloy actuators 有权
    由形状记忆合金致动器驱动的燃气涡轮发动机的可变面积喷嘴

    公开(公告)号：US06735936B2

    公开(公告)日：2004-05-18

    申请号：US09824419

    申请日：2001-04-02

    申请人： Nancy M. Rey ,  Robin Mihekun Miller ,  Thomas G. Tillman ,  Robert M. Rukus ,  John L. Kettle

    发明人： Nancy M. Rey ,  Robin Mihekun Miller ,  Thomas G. Tillman ,  Robert M. Rukus ,  John L. Kettle

    IPC分类号： F02K112

    CPC分类号： F02K1/1207 ,  F03G7/065 ,  F05D2300/505 ,  Y02T50/671 ,  Y10T74/20

    摘要： A gas turbine engine includes a variable area nozzle having a plurality of flaps. The flaps are actuated by a plurality of actuating mechanisms driven by shape memory alloy (SMA) actuators to vary fan exist nozzle area. The SMA actuator has a deformed shape in its martensitic state and a parent shape in its austenitic state. The SMA actuator is heated to transform from martensitic state to austenitic state generating a force output to actuate the flaps. The variable area nozzle also includes a plurality of return mechanisms deforming the SMA actuator when the SMA actuator is in its martensitic state.

    摘要翻译： 燃气涡轮发动机包括具有多个翼片的可变区域喷嘴。 翼片由形状记忆合金（SMA）致动器驱动的多个致动机构致动，以改变风扇存在的喷嘴面积。 SMA致动器在其马氏体状态下具有变形的形状，并且其奥氏体状态具有母体形状。 SMA致动器被加热以从马氏体状态转变为奥氏体状态，产生力输出以致动翼片。 可变区域喷嘴还包括当SMA致动器处于其马氏体状态时使SMA致动器变形的多个返回机构。