Airplane single-wheel dual-brake-alternative fly-by-wire braking system

Abstract

Provided is an airplane single-wheel dual-brake-alternative fly-by-wire braking system. A braking instruction sensor replaces a hydraulic braking valve, and a positive gain electro-hydraulic servo valve is adopted. A braking antiskid control part is composed of an airplane wheel speed sensor, a control box and the electro-hydraulic servo valve. A control device composed of a pressure sensor, a control box and an electromagnetic valve controls an oil path to be opened and closed through a braking pressure control method so that partial braking or overall braking of the braking system can be achieved. Partial braking indicates that a small braking device operates, and overall braking indicates that the small braking device and a large braking device simultaneously operate, so dual braking of an airplane wheel is achieved. The braking system is suitable for the single-wheel dual-brake airplane wheel adopting carbon brakes and can meet the requirement for alternatively using dual brakes of the single wheel, the use state of the carbon brakes is adjusted, the wear-resistant excellent characteristic of the carbon-carbon composite friction materials is brought into full play, the problem that an existing single-wheel single-brake carbon brake disc is large in wear and short in service life is effectively solved, the service life of carbon discs is prolonged, and economic benefits of the carbon discs are improved.

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...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency in the prior art that the aircraft braking mode cannot be selected, the present invention proposes a fly-by-wire braking system with optional single wheel and double brakes for aircraft

Images