The invention provides a multifunctional vent valve for a helicopter fuel system, the multifunctional vent valve comprises a spring 1, a valve assembly, a valve base 8 and a shell 11, the valve assembly comprises a valve cavity shell 2, a floater 3, a floater cavity 4, a first sealing ring 5, a valve cavity base 6, a second sealing ring 7, a third sealing ring 9 and a steel ball 10, the bottom end of the valve base 8 is of a mounting flange structure, and the upper end of the valve base 8 is provided with a boss structure which is turned outwards; the shell 11 is of a hollow columnar structure, a boss at the upper end of the valve base 8 is assembled in the bottom end of the shell 11, and an outlet of the multifunctional vent valve is formed in the top end of the shell 11. The valve base 8 and the shell 11 form a vent valve shell, and the spring 1 and the valve assembly are arranged in an inner cavity of the valve base 8 and an inner cavity of the shell 11. One end of the spring 1 is fixed at the upper part of the shell 11, and the other end is fixed at the upper part of the valve cavity shell 2; and the valve assembly is pressed on the valve base 8 under the action of the spring 1.

    本申请提供一种用于直升机燃油系统的多功能通气阀,多功能通气阀包括弹簧1、活门组件、阀底座8、壳体11,所述活门组件包括活门腔壳体2、浮子3、浮子腔4、密封圈一5、活门腔底座6、密封圈二7、密封圈三9、钢球10,其中:阀底座8为空心柱状结构,阀底座8的底端为安装法兰结构,阀底座8的上端设置有向外翻的凸台结构;壳体11为空心的柱状结构,阀底座8的上端的凸台装配在壳体11的底端内,壳体11的顶端为多功能通气阀的出口;阀底座8和壳体11组成通气阀外壳,阀底座8和壳体11的内部空腔设置有弹簧1和活门组件;弹簧1的一端固定在壳体11上部,另一端固定在活门腔壳体2的上部;活门组件在弹簧1的作用下压紧在阀底座8上。


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    Title :

    Multifunctional vent valve for helicopter fuel system


    Additional title:

    一种用于直升机燃油系统的多功能通气阀


    Contributors:
    WANG XICHANG (author) / XIE ZENG (author) / GUO YANQING (author) / LI HONG (author) / WANG QING (author) / JIANG HUI (author)

    Publication date :

    2023-03-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / F16K VALVES , Ventile



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