The invention discloses a propeller speed limiter. A transmission shaft is connected into a small-diameter hole of a shell in a sliding mode through a lining, two L-shaped balance weights located in alarge-diameter hole of the shell are installed at the upper end of the transmission shaft, an oil distribution valve is assembled in a center hole of the transmission shaft in a sliding mode, and a speed limiting spring is connected to the upper end of the oil distribution valve in a pressing mode. Two hook parts of the two L-shaped counter weights are propped against a bearing outer ring. The lower end of a cover is fixed to the upper end face of the shell, an adjusting screw is locked and fixed in a small hole of the cover through threads, and an adjusting plunger, a guide plate and the speed limiting spring seat are assembled together and installed in a large cylindrical hole of the cover. An annular oil groove I is formed in the transmission shaft, and a plurality of oil distributionholes communicated with a lubricating oil inlet hole of the shell and an oil return hole I communicated with an oil return hole II of the shell are formed in the transmission shaft. The oil distribution valve is provided with an annular oil groove II, and the annular oil groove II is not communicated or communicated with the annular oil groove I through the movement of the oil distribution valve.The rotating speed of the propeller is accurately and quickly controlled, the phenomenon of flying when the propeller breaks down is prevented, and the flight safety coefficient is higher.

    本发明公开了一种螺旋桨限速器,传动轴通过衬套滑动连接在壳体小直径孔内,位于壳体大直径孔内的两L型配重安装在传动轴上端,分油活门可滑动地装配在传动轴中心孔内,其上端部压接有限速弹簧;两L型配重两钩部抵在轴承外圈上;盖下端固定在壳体上端面,其小孔内螺纹锁紧固定有调整螺钉,调整柱塞与导板和限速弹簧座装配在一起,安装在盖的圆柱大孔内;传动轴上有环油槽Ⅰ,开有多个与壳体滑油进孔连通的分油孔和与壳体的回油孔Ⅱ连通的回油孔Ⅰ;分油活门开有环油槽Ⅱ,通过分油活门的移动,使环油槽Ⅱ与环油槽Ⅰ不连通或连通。本发明螺旋桨转速操控精确快速、防止了螺旋桨故障时发生飞转的现象的发生,使飞行安全系数更高。


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    Title :

    Propeller speed limiter


    Additional title:

    一种螺旋桨限速器


    Contributors:
    CHEN SHUANGSHUANG (author) / HAO LI (author) / ZHANG HEFANG (author) / WANG CHUNHUI (author)

    Publication date :

    2020-05-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



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