Aircraft landing gear buffer

An aircraft landing gear and buffer technology, applied in the field of aircraft landing gear, can solve the problems of difficult shock absorption, low heat consumption of elastic parts, and insufficient buffering efficiency, so as to suppress the rebound phenomenon, the shock absorption process is stable, and the buffering efficiency is reduced. good shock effect

CN111609073BActive Publication Date: 2021-08-27SHANGHAI INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-08-27

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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.
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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 ...

Examples

Embodiment Construction

[0050] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and use imprecise ratios, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0051] see Figures 1 to 9 , the core of the present invention is to provide an aircraft landing gear buffer, including an outer cylinder 1, an inner cylinder 2, a plurality of first damping holes 7, a plurality of second damping holes 8, a piston assembly, a moving assembly 9, and an elastic member. Three-stage cushioning has good shock absorption effect, and the shock absorption process is stable. According to the size of the impact load, one or more stages of cushioning are automatically selected, which can ...