The invention discloses an oil-gas separation type variable oil hole composite crash-resistant buffer. The buffer comprises a piston rod assembly and a metal expansion cylinder, the piston rod assembly comprises a piston rod, a floating piston and a conical head, the lower end of the piston rod makes contact with the conical head and is fixed through a screw, a space defined by the piston rod andthe conical head serves as an air cavity, the floating piston is arranged in the air cavity and can float up and down, an oil hole is formed in the center of the bottom of the conical head, and the oil hole can be shrunk according to stress; the metal expansion cylinder comprises a sizing guide belt, a reducing belt and an expansion cylinder body, the sizing guide belt, the reducing belt and the expansion cylinder body are sequentially connected and wrap the conical head, the outer diameter of the upper end of the conical head is larger than the inner diameter of the expansion cylinder body, the inner space of the expansion cylinder body serves as an oil cavity, an oil needle is arranged in the oil cavity, the oil needle is inserted into the oil hole to change the size of the oil hole whenthe buffer works. During working, the metal expanding energy-absorbing buffer and the oil-gas separation type buffer play roles at the same time, so that the buffering efficiency and the crash resistance of the aircraft are effectively improved.

    本发明公开了一种油气分离型变油孔复合式耐坠毁缓冲器,包括活塞杆组件和金属胀筒,活塞杆组件包括活塞杆、浮动活塞和锥头,活塞杆的下端与锥头接触并通过螺钉固定,将活塞杆与锥头围合形成的空间作为气腔,浮动活塞置于气腔内并能够上下浮动,锥头的底部中心处开有油孔,该油孔能够根据受力进行缩放;金属胀筒包括定径引导带、变径带和胀筒筒身,定径引导带、变径带和胀筒筒身依次连接且将锥头包裹在内,锥头上端的外径大于胀筒筒身的内径,将胀筒筒身的内部空间作为油腔,油腔内部设有油针,油针在缓冲器工作时插入油孔从而改变油孔大小。工作时,金属扩径吸能缓冲器与油气分离型缓冲器同时发挥效用,有效提升了缓冲效率和飞行器耐坠毁性能。


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    Title :

    Oil-gas separation type variable oil hole combined crash-resistant buffer


    Additional title:

    一种油气分离型变油孔复合式耐坠毁缓冲器


    Contributors:
    WEI XIAOHUI (author) / CHEN HU (author) / FANG XINGBO (author) / XIE XINHONG (author) / NIE HONG (author)

    Publication date :

    2020-09-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F16F SPRINGS , Federn / B64C AEROPLANES , Flugzeuge



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