The invention relates to a propeller variable pitch limiting system, which belongs to the technical field of aircrafts and comprises a speed regulator, a shaft sleeve and a beta pipe, a mounting hole is formed in a shell of the speed regulator, and a large-pitch oil hole and a small-pitch oil hole are formed in the side wall of the shell of the speed regulator; the shaft sleeve is fixed in the mounting hole in a penetrating manner, a large-distance transfer hole and a small-distance transfer hole are formed in the shaft sleeve, and three closed rings are fixed in the shaft sleeve in a penetrating manner; the beta pipe penetrates through the three closed rings in a sealed and sliding mode, and small-distance oil inlet and outlet holes and large-distance oil inlet and outlet holes are formed in the pipe wall of the beta pipe at intervals. The large-distance oil hole, the large-distance transfer hole, the large-distance oil supply area and the large-distance oil inlet and outlet hole are communicated in sequence, then the small-distance oil hole, the small-distance transfer hole, the small-distance oil supply area and the small-distance oil inlet and outlet hole are communicated in sequence, when the large-distance oil inlet and outlet hole supplies oil, the small-distance oil inlet and outlet hole is used for returning oil, and when the small-distance oil inlet and outlet hole supplies oil, the small-distance oil inlet and outlet hole is used for returning oil. Large-distance oil inlet and outlet holes are used for oil return, large-distance and small-distance changes of the propeller are achieved, the structure of a distance changing system is simplified, and reliability is improved.

    本发明涉及一种螺旋桨变距限动系统,属于飞行器技术领域,包括:调速器、轴套及贝塔管,调速器壳体内部设有安装孔且其侧壁上设有大距油孔和小距油孔;轴套穿固在安装孔内且其上设有大距中转孔和小距中转孔,其内部穿固有三个封闭环;贝塔管密封滑动穿设在三个封闭环上且其管壁上间隔设有小距进出油孔和大距进出油孔。本发明先利用大距油孔、大距中转孔、大距供油区和大距进出油孔依次连通,而后再利用小距油孔、小距中转孔、小距供油区和小距进出油孔依次连通,可以在大距进出油孔供油时,使用小距进出油孔回油,也可以在小距进出油孔供油时,使用大距进出油孔回油,实现螺旋桨大、小距变,简化变距系统结构,提高其可靠性。


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    Title :

    Propeller variable pitch limiting system


    Additional title:

    一种螺旋桨变距限动系统


    Contributors:
    MENG DEHUA (author) / YU XINGCHEN (author) / XING BOHAN (author)

    Publication date :

    2025-03-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



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