The invention discloses a metal expansion cylinder-oil gas return type variable oil hole undercarriage crash-resistant buffer which comprises an expansion cylinder, a conical cylinder mounted in the expansion cylinder, a positioning pin for limiting between the conical cylinder and the expansion cylinder, a floating piston mounted in the conical cylinder and a piston rod, an oil cavity is formed between the top of the floating piston and the inner wall of the conical cylinder, and an oil return cavity is formed in the piston rod. A plurality of grooves are formed in the inner wall of one side of the interior of the oil return cavity, protruding blocks are arranged on the inner wall of the other side of the interior of the oil return cavity, the protruding blocks and the grooves are matched one by one to form damping seams, and oil holes are formed in the floating piston and communicate with the oil cavity and the oil return cavity. The oil return cavity is matched with the grooves through the protruding blocks to form the damping seam with the variable size, variable damping at different positions is achieved, the buffering force can be changed by controlling the oil flow speed, and the buffer can obtain large buffering force in the middle-rear section of the buffering stroke while obtaining a smooth buffering force curve.

    本发明公开了一种金属胀筒‑油气回油式变油孔起落架耐坠毁缓冲器,包括胀筒、安装在胀筒内的锥筒、锥筒与胀筒之间限位的定位销、安装在锥筒内的浮动活塞、活塞杆,浮动活塞顶部与锥筒内壁形成油腔,活塞杆内设置回油腔,回油腔内部一侧内壁设置若干凹槽,另一侧内壁设置凸块,所述凸块与凹槽一一匹配形成阻尼缝,浮动活塞上设置有油孔,油孔连通油腔和回油腔。回油腔通过凸块和凹槽配合形成大小变化的阻尼缝,实现不同位置的变阻尼,可以通过控制油液流速来改变缓冲力的大小,有利于缓冲器得到平滑的缓冲力曲线的同时在缓冲行程中后段能得到较大的缓冲力。


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    Title :

    Metal expansion cylinder-oil gas oil return type variable oil hole undercarriage crash-resistant buffer


    Additional title:

    一种金属胀筒-油气回油式变油孔起落架耐坠毁缓冲器


    Contributors:
    WEI XIAOHUI (author) / HAN YUYING (author) / FANG XINGBO (author) / WANG MENG (author) / NIE HONG (author)

    Publication date :

    2021-10-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge / B64G Raumfahrt , COSMONAUTICS



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