公开(公告)号：US4472998A

公开(公告)日：1984-09-25

申请号：US442873

申请日：1982-11-19

申请人： Robert D. Vanderlaan

发明人： Robert D. Vanderlaan

IPC分类号： F15B11/17 ,  F15B18/00 ,  F15B13/06

CPC分类号： F15B18/00 ,  Y10T137/87201 ,  Y10T137/87209

摘要： A redundant control actuation system for an aircraft including an electro-mechanically controlled, hydraulically powered actuator for driving a main control valve of a servo-actuator control system. The actuator includes a tandem piston connected to the main control valve and a force motor driven tandem pilot valve axially movable in the piston for simultaneously controlling the differential application of fluid pressure from respective hydraulic systems on opposed pressure surfaces of respective piston sections to cause movement of the piston in response to relative axial movement of the pilot valve as long as at least one hydraulic system remains operative. The piston pressure surfaces are sized and arranged to minimize force unbalance on the piston due to pressure variations in the hydraulic systems. Also, a pilot valve centering spring device may be provided to minimize undesirable transient motions during system turn on and shut down. Upon failure or shut down of both hydraulic systems, a shut off valve sleeve concentric with the pilot valve moves axially in the piston to render the pilot valve inoperative and release fluid pressure from opposed, corresponding pressure surfaces of the piston sections to respective returns therefor through centering rate control orifices as the piston is moved to a neutral position by a centering spring device acting on the main control valve.

摘要翻译： 一种用于飞行器的冗余控制致动系统，包括用于驱动伺服致动器控制系统的主控制阀的电机械控制的液压动力致动器。 致动器包括连接到主控制阀的串联活塞和在活塞中可轴向移动的力马达驱动串联先导阀，用于同时控制来自相应的液压系统在相应的活塞部分的相对的压力表面上的流体压力的差分应用， 活塞响应于先导阀的相对轴向运动，只要至少一个液压系统保持工作。 活塞压力表面的尺寸和布置被设计成由于液压系统中的压力变化而使活塞上的不平衡力最小化。 此外，可以提供先导阀定心弹簧装置，以在系统打开和关闭期间最小化不期望的瞬时运动。 在两个液压系统失效或关闭时，与先导阀同心的截止阀套筒在活塞中轴向移动，使得先导阀不起作用，并将活塞部分的相对的相应的压力表面的流体压力释放到相应的返回位置，以通过 当活塞通过作用在主控制阀上的定心弹簧装置移动到中立位置时，定心速度控制孔。