The invention discloses a variable-pitch execution mechanism of an electronic pitch varying device of a screw propeller. A cylinder body of a hydraulic cylinder is fixed on one end wall of a propeller shell; a piston divides the cylinder body of the hydraulic cylinder into an oil cavity A and an oil cavity B; one end of a pulling sleeve is fixed in the central hole of the piston and the middle part of the pulling sleeve is fixedly connected with an eccentric pin fixedly mounted on each paddle blade by a bearing; the other end of the pulling sleeve is fixed in the central hole of the propeller shell; the piston can slidably penetrate through the two ends and is fixedly arranged on two guide rods of a cylinder body wall of the hydraulic cylinder and a propeller shell wall respectively; a beta pipe penetrates through the central holes of a propeller shaft, the propeller shell and the pulling sleeve; one end of the beta pipe is fixed on the pulling sleeve and the beta pipe is internally provided with a central oil cavity communicated with the oil cavity A of the hydraulic cylinder and a wall oil feeding cavity communicated with the oil cavity B of the hydraulic cylinder; the piston is provided with an oil passing hole for connecting the oil cavity A with the oil cavity B; and a nozzle with a filter screen is mounted in the oil passing hole. The variable-pitch execution mechanism has the advantages of simple structure, light weight, low accumulated errors and rapid responding speed, is convenient to mount and detach and can be applicable to the electronic pitch varying device of the screw propeller.


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    Title :

    Variable-pitch execution mechanism of electronic pitch varying device of screw propeller


    Contributors:
    LI TAO (author) / TANG SIJIA (author) / QIN WEI (author) / XU DINGDING (author)

    Publication date :

    2015-04-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



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