The invention relates to an air vent device for an oil tank. The air vent device comprises an air vent pipeline with a pipe opening section extending towards the upper wall face of the oil tank; the floatable ventilation component is provided with a through hole, is arranged around the pipe orifice section and floats along the pipe orifice section along with the change of the fuel level in the fuel tank; and the limiting structure is arranged at the pipe orifice section and is accommodated between the upper stop part and the lower stop part of the floatable ventilation component. When the oil level of fuel oil in the oil tank is lowered so that the floatable ventilation component can reach the lower limit position, the limiting structure makes contact with the upper stopping part. When the fuel oil level rises to enable the floating ventilation component to reach the upper limit position, the limiting structure makes contact with the lower stopping part, the height for preventing fuel oil from overflowing into the ventilation pipeline is increased, the ventilation time of the oil tank is prolonged, meanwhile, the fuel oil flowing capacity of the ventilation pipeline is kept, and pressure building of the oil tank can be effectively avoided. The invention further provides a fuel tank for the aircraft. The fuel tank can comprise the air vent device.

    本发明涉及一种用于油箱的通气口装置,包括:具有朝向油箱的上壁面延伸的管口段的通气管路;具有贯通孔的可浮动通气构件,其围绕管口段设置并随着油箱内燃油油位的变化而沿着管口段浮动;以及限位结构,其设置在该管口段处,并容纳在可浮动通气构件的上止挡部与下止挡部之间。其中,当油箱内的燃油油位降低以使可浮动通气构件到达下极限位置时,限位结构与上止挡部接触;当燃油油位升高以使浮动通气构件到达上极限位置时,限位结构与下止挡部接触,这增加了防止燃油溢出到通气管路中的高度,延长了油箱的通气时间,同时也保留了通气管路的燃油流通能力,能有效避免油箱憋压。本发明还提供一种用于飞行器的油箱,该油箱可以包括如上所述的通气口装置。


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    Title :

    Vent device for fuel tank and fuel tank for aircraft


    Additional title:

    用于油箱的通气口装置以及用于飞行器的油箱


    Contributors:
    WANG XIAOYANG (author) / ZHANG XIAOYU (author) / XUE YONG (author) / JIANG JINGHUI (author)

    Publication date :

    2023-12-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT



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