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    • 1. 发明公开
    • Pitch change control system
    • 音高变化控制系统
    • EP0559990A1
    • 1993-09-15
    • EP92630032.8
    • 1992-03-13
    • UNITED TECHNOLOGIES CORPORATION
    • Duchesneau, Jerome G.Schwartz, Robert A.
    • B64C11/38
    • B64C11/38
    • The pitch change control system for adjusting the pitch of a variable pitch propeller blade (20) rotatably mounted to a hub (10) of the propeller includes a pitch change actuator comprising a blade actuation piston (30) operatively connected to the propeller blade (20), a pitchlock piston (50) having a longitudinally directed annular shaft (56) extending therefrom about the shaft (34) of the blade actuation piston (30), pitchlock assembly (130, 140, 150) operatively interconnected between the pitchlock piston (50) and the blade actuation piston (30) for restraining inadvertent blade pitch reduction, bias spring (60) for exerting a preload force against the pitchlock piston (50), and fluid supply conduit (70) operatively interconnected in fluid communication between control valve (100) and the pitch change actuator.
    • 用于调节可旋转地安装到螺旋桨的轮毂(10)的可变螺距螺旋桨叶片(20)的桨距的桨距变化控制系统包括桨距变化促动器,该桨距变化促动器包括可操作地连接到螺旋桨叶片(20)的桨叶促动活塞(30) ),具有围绕叶片致动活塞(30)的轴(34)延伸的纵向指向的环形轴(56)的节距锁合活塞(50),可操作地互连在节距锁合活塞(30) 50)以及用于抑制无意识的叶片节距减小的叶片致动活塞(30),用于对所述节距间活塞(50)施加预加载力的偏置弹簧(60),以及流体供应管道(70),所述流体供应管道在控制阀 (100)和变桨致动器。