The invention belongs to the technical field of helicopter undercarriages, and discloses an efficient energy-absorbing buffer which comprises a low-pressure piston rod, a middle cylinder and a high-pressure piston rod, the low-pressure piston rod and the high-pressure piston rod are arranged in holes in the two ends of the middle cylinder respectively, and a cavity between the two holes of the middle cylinder is an oil pressing cavity; an outward inner cavity of the low-pressure piston rod is a low-pressure air cavity, an inner cavity, facing the middle cylinder, of the low-pressure piston rod is a low-pressure oil return cavity, the low-pressure oil return cavity and the low-pressure air cavity are separated through a low-pressure cavity floating piston, and the low-pressure oil return cavity is communicated with the oil pressing cavity through a low-pressure cavity throttling valve assembly. An outward inner cavity of the high-pressure piston rod is a high-pressure air cavity, an inner cavity, facing the middle cylinder, of the high-pressure piston rod is a high-pressure oil return cavity, the high-pressure air cavity and the high-pressure oil return cavity are separated through a high-pressure cavity floating piston, and the high-pressure oil return cavity is communicated with the oil pressing cavity through a high-pressure cavity throttling valve assembly. The efficiency of the buffer is improved to the maximum extent, the pressure of the oil return cavity and the pressure of the air cavity are basically the same in the falling process, and design of an overload protection device is facilitated.

    本发明属于直升机起落架技术领域,公开了一种高效吸能缓冲器,包括低压活塞杆、中间筒和高压活塞杆,低压活塞杆和高压活塞杆分别设在中间筒的两端的孔内,中间筒两孔之间的腔室为压油腔;低压活塞杆朝外的内腔为低压气腔,低压活塞杆朝中间筒的内腔为低压回油腔,低压回油腔与低压气腔之间通过低压腔浮动活塞隔开,低压回油腔通过低压腔节流阀组件连通压油腔;高压活塞杆朝外的内腔为高压气腔,高压活塞杆朝中间筒的内腔为高压回油腔,高压气腔和高压回油腔之间通过高压腔浮动活塞隔开,高压回油腔通过高压腔节流阀组件与压油腔连通。本发明最大程度提高了缓冲器的效率,落震过程中回油腔压力和气腔压力基本相同,利于超载保护装置设计。


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    Title :

    Efficient energy absorption buffer


    Additional title:

    一种高效吸能缓冲器


    Contributors:
    WANG LANMING (author) / JIAO YANG (author)

    Publication date :

    2023-08-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



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