The present disclosure describes a propeller control unit (100) for controlling the blade pitch of a propeller. The unit includes an electrohydraulic servo valve (106) ("EHSV") and is connected to a propeller actuator (102) that adjusts the blade pitch of a propeller. The EHSV (106) operates to allow pressurized fluid to flow from a pressurized fluid source to the actuator (102) to adjust the blade pitch of the propeller in a flight pitch range and a ground pitch range, to allow pressurized fluid to flow from the source to the actuator (102) to adjust the blade pitch of the propeller in a flight pitch range but not a ground pitch range, and to block the flow of pressurized fluid from the source to the actuator and drain pressurized fluid from the actuator (102) to prevent adjustment of theblade pitch of the propeller in the flight pitch range or the ground pitch range.
本公开描述了一种用于控制螺旋桨的叶片俯仰的螺旋桨控制单元(100)。该单元包括电动液压伺服阀(106)(“EHSV”)并连接到调节螺旋桨的叶片俯仰的螺旋桨致动器(102)。EHSV(106)操作以允许加压流体从加压流体源流到致动器(102)以在飞行俯仰范围和地面俯仰范围内调节螺旋桨的叶片俯仰,以允许加压流体从源流到致动器(102)以在飞行俯仰范围而不是地面俯仰范围内调节螺旋桨的叶片俯仰,并且阻止加压流体从源流到致动器,并从致动器(102)排出加压流体以防止在飞行俯仰范围或地面俯仰范围内调节螺旋桨的叶片俯仰。
PROPELLER CONTROL UNIT
螺旋桨控制单元
02.06.2020
Patent
Elektronische Ressource
Chinesisch
IPC: | B64C AEROPLANES , Flugzeuge |