Aircraft landing gear buffer

Abstract

The invention discloses an aircraft landing gear buffer, comprising: an outer cylinder; an inner cylinder movably arranged in the outer cylinder, and a first chamber and a second chamber whose volume changes with the movement of the inner cylinder are arranged between the inner cylinder and the outer cylinder. There is a third cavity inside the inner cylinder, at least one first damping hole is set between the first cavity and the second cavity, at least one second damping hole is set between the second cavity and the third cavity, and the second cavity There is buffer gas, and the third chamber is provided with buffer liquid; the piston assembly is located in the third chamber; one end of the moving assembly is connected to the piston assembly through an elastic member, and the other end extends out of the outer cylinder to connect with the impacted part; the moving assembly moves upward and compresses The elastic member produces elastic force for the first level of cushioning; the piston assembly moves upward to compress the buffer liquid for the second level of cushioning; the inner cylinder moves upward to compress the buffer gas for the third level of cushioning. The buffer has three levels of buffering, and automatically selects one or more levels of buffering according to the size of the impact load, which can absorb large impacts and filter small vibrations.

Description

technical field [0001] The invention belongs to the technical field of aircraft landing gear, in particular to an aircraft landing gear buffer. Background technique [0002] Landing gear is an accessory device at the lower part of the aircraft that is used to support the aircraft during takeoff, landing and taxiing and for ground movement. The landing gear buffer is used to buffer the impact caused by the take-off and landing or movement of the aircraft, especially when the aircraft lands, the ground will generate a large impact force on the aircraft fuselage through the landing gear, and the aircraft will vibrate due to the unevenness of the ground. , which is very detrimental to the structure and flight safety of the aircraft, so setting the landing gear buffer has a good protective effect on the overall structure of the aircraft. [0003] At present, the buffers used in the main landing gear and front landing gear of aircraft are mostly oil-pneumatic buffers and elastic ...

AI Technical Summary

Problems solved by technology

[0004] But they all have some shortcomings when working alone

The cushioning efficiency of common oil-pneumatic buffers is not high enough, it is difficult to effectively absorb small vibrations, and the buffer stroke of the buffer is not long enough, resulting in the cushioning effect not being comfortable enough for passengers; while the elastic buffer is mainly Relying on elastic deformation to absorb energy, the heat loss of elastic parts is small, mainly by installing friction washers on the inner cylinder to increase heat loss

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