The invention discloses a servo pitch control device for a screw propeller. A hydraulic cylinder body is fixed on a screw propeller shell, the other end of a shifting sleeve is fixed on a piston, one end of a beta pipe is fixed on the piston, and the beta pipe is internally provided with a central oil chamber communicated with an oil chamber I of the hydraulic cylinder and an on-wall oil chamber communicated with an oil chamber II of the hydraulic cylinder; the contact point of an assisted loop penetrates through a propeller shaft and is fixed on the screw propeller shell; the signal acquisition end of a rotating speed sensor directly faces the contact point of the assisted loop; two oil inlet paths of an oil way distributor are connected with two oil inlets of a servo valve respectively, two ends of each oil outlet path are connected with the two oil outlets of the servo valve and the central oil chamber and the on-wall oil chamber of the beta pipe respectively, and two ends of an oil return path are connected with an oil return opening of the servo valve; and the signal outlet end of the rotating speed sensor is connected with the signal input end of a controller, and the signal outlet end of the controller is connected with the signal input end of the servo valve. The servo pitch control device has high response speed, high control precision, good universality and light weight, and can be assembled and disassembled conveniently, the pitch control device can be replaced on site, and the maintaining operation is simple.


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    Title :

    Servo pitch control device for screw propeller


    Contributors:
    ZENG QINGJUE (author) / ZHAO LING (author) / LI YANHONG (author) / GUO JIANXIANG (author) / TANG SIJIA (author)

    Publication date :

    2015-04-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



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