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

A technology of braking system and fly-by-wire control, which is applied in the direction of control mechanism, aircraft braking arrangement, vehicle components, etc., and can solve the problem of not being able to select the aircraft braking method

Inactive Publication Date: 2016-08-31
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
  • Description
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  • Application Information

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

Method used

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

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Embodiment Construction

[0025] See attached figure 1 . The main landing gear of aircraft is equipped with a brake wheel, has two brake devices, is the double brake wheel of single wheel. The brake discs of the brakes are made entirely of carbon-carbon composite friction material.

[0026]The two braking devices are respectively a small braking device and a large braking device. The small number of brake discs of the small brake device makes the axial size of the heat storage small, so it is called a small brake device; the number of brake discs of the large brake device is large, so that the axial size of the heat store is large, so it is called a small brake device. Big brakes. Both the small braking device and the large braking device are disclosed in the invention creation with application number 201610281025.2:

[0027] The thermal reservoir of the small brake device is composed of a compression disc, a pressure bearing disc and a moving disc, the number of which is 1 to 2 discs, and is a sin...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C25/44B60T8/171B60T8/32B60T13/68
CPCB60T8/171B60T8/325B60T13/686B64C25/44
Inventor 何永乐王红玲
Owner XIAN AVIATION BRAKE TECH
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