Airplane brake-by-wire braking system for preventing emergency brake from being improperly used

Abstract

The invention relates to an airplane braking system for preventing an emergency brake from being improperly used. The airplane braking system comprises a normal braking system and an emergency braking system, wherein the normal braking system comprises a braking command sensor, an electromagnetic hydraulic lock, an electromagnetic servo valve, a control box and an airplane wheel speed sensor; the emergency braking system comprises an emergency braking valve, a converting valve and a switch; and the normal braking system and the emergency braking system are contacted and converted through the converting valve. According to the airplane braking system disclosed by the invention, during emergency braking, if normal braking is also used, the normal braking system is forced to release pressure, so that pressure does not exist in a normal input opening of the converting valve, the situation that the converting valve is completely converted to the emergency braking system is guaranteed, the application of the emergency braking is guaranteed, and emergency braking failure and accident hidden danger caused by that the emergency braking and the normal braking are used at the same time are eliminated fundamentally; and according to the airplane braking system disclosed by the invention, only one electrical switch element is additionally arranged on a conventional braking system, so that conventional equipment is convenient to refit.

Description

technical field [0001] The invention relates to an aircraft wheel brake system, in particular to an aircraft fly-by-wire brake system for ensuring emergency brake operation. Background technique [0002] The aircraft wheel braking system is an important part of the landing gear of the aircraft, which is used to shorten the run distance after the aircraft lands normally, stop the aircraft as soon as possible, and prevent the tires from bursting. Aircraft fly-by-wire braking system is a new type of braking technology, and its application continues to expand. The braking system of aircraft fly-by-wire braking includes two parts: normal braking and emergency braking. The emergency braking system is used after the normal braking system fails or in certain situations. The emergency brake and the normal brake of some equipment in active service share a set of pistons, that is, a single-channel cylinder seat, to implement the brake. There is a switching valve between the normal br...

AI Technical Summary

Problems solved by technology

The main advantage of this system structure design is that it simplifies the braking device and reduces the weight. However, due to human factors, the emergency braking and normal braking are used at the same time, or the emergency braking is implemented before the normal braking pressure is released, resulting in conversion. The valve cannot be switched correctly and stops at the neutral position, blocking the outlet pipeline and making it impossible to brake, which brings serious hidden dangers, it is worth noting

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