Single-actuating type magneto-rheological shock absorber used for aircraft landing gear

Abstract

The invention relates to a single-actuating type magneto-rheological shock absorber used for an aircraft landing gear. The single-actuating type magneto-rheological shock absorber comprises an outer cylinder barrel, an inner cylinder barrel, a piston rod, a piston assembly and an aircraft wheel axle base, wherein an end cover is installed on the top of the outer cylinder barrel coaxially in a sealed mode; the inner cylinder barrel is coaxially installed in the lower end of the outer cylinder barrel in a sliding mode; the aircraft wheel axle base is installed at the lower end of the inner cylinder barrel in a threaded mode; the inner and outer cylinder barrels are coaxially provided with the piston rod, the upper end of the piston rod is fixedly installed on the end cover, and the piston assembly is installed at the lower end of the piston rod; the outer edge of the piston assembly makes friction contact with the inner wall of the inner cylinder barrel. Based on an existing aircraft landing gear buffer structure, the piston assembly capable of applying the magneto-rheological fluid technology is added, so that the shock absorber is simple in structure, low in energy consumption, small in size and fast in response, and damping force output by the shock absorber continuously changes, is adjustable and is reversible. Closed-loop semi-active control is achieved by being combined with a computer, an optimization control algorithm, a sensor, a controller and a power source, and the buffering efficiency and shock absorption effect of the shock absorber are improved.

Description

technical field [0001] The invention belongs to the field of aircraft accessories, and relates to a single-acting magneto-rheological shock absorber for aircraft landing gear that can realize semi-active control. Background technique [0002] As an important part of the aircraft structure, the landing gear of the aircraft bears the static and dynamic loads generated when the aircraft is in contact with the ground, and absorbs and consumes the energy generated by the aircraft during landing, runway taxiing and other ground movements. Aircraft landing gear plays an important role in slowing down the vibration of the aircraft, reducing the load transmitted by the ground on the aircraft structure, improving the comfort of the passengers, and ensuring the flight safety of the aircraft. [0003] Currently, most modern aircraft landing gear use oil-pneumatic shock absorbers. The oil-gas shock absorber achieves shock absorption through the energy consumption of the oil flowing thro...

AI Technical Summary

Problems solved by technology

When dealing with large impact loads, it must be achieved by increasing the throttle and increasing the stroke of the piston, which will increase the mass of the landing gear

In addition, the vibration control response of the oil-pneumatic shock absorber to the external load and the output damping force is passive, which reduces the cushioning performance and shock absorption effect of the shock absorber.

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