A fly-by-wire brake system with optional single wheel and double brakes for aircraft

Abstract

A fly-by-wire control brake system capable of selecting braking modes for a single-wheel dual-brake mode of an airplane comprises a brake command sensor, a control box, an electro-hydraulic servo valve, a hydraulic switch, a solenoid valve and an airplane wheel speed sensor. The airplane wheel speed sensor, the control box and the electro-hydraulic servo valve form a brake slipping prevention control part. The hydraulic switch and the solenoid valve are used for achieving selection of the braking modes. According to the selection of the braking modes, either a small brake device is selected to operate so that partial braking of an airplane wheel can be achieved, or the small brake device and a large brake device are selected to operate simultaneously so that dual braking of the airplane wheel can be achieved. The fly-by-wire control brake system is suitable for the single-wheel dual-brake airplane wheel provided with a carbon brake, the requirement of the single-wheel dual-brake airplane wheel for selecting the braking mode can be met, the application state of a carbon plate is adjusted, and the excellent abrasion resistance of a carbon compound frictional material is brought into full play; and the problems that an existing carbon brake plate for a single-wheel single-brake mode is badly abraded and is short in service life are solved, the service life of the carbon plate is prolonged, and the economic benefits of the carbon plate are increased.

Description

technical field

[0001] The invention relates to an aircraft wheel brake system, in particular to a brake control system with single-wheel double brakes and taxi brake selection based on brake pressure. Background technique

[0002] Compared with steel brakes, aircraft carbon brakes have the advantages of light weight, wear resistance, high specific heat, and non-bonding at high temperatures because the brake discs are completely made of carbon-carbon composite friction materials, which significantly improves the technical performance and reliability of aircraft use. Safety, maintenance and economy, so it is widely used in modern aircraft. Carbon brakes are especially suitable for high-energy braking situations, and their excellent friction and wear characteristics endow carbon brake discs with durable qualities. However, after the carbon brake was put into field operation, it was found that the service life of the carbon brake disc could not reach the given life value of th...

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