Electric hydraulic pressure servo valve

A servo valve, pressure technology, applied in the direction of control valve and bleed valve, brake assembly, aircraft brake arrangement, etc., can solve problems such as the inability to meet the requirements of aircraft brake anti-skid control, improve work stability, prevent pollutants hazards, good job stability and reliability

Inactive Publication Date: 2013-06-12
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art that cannot meet the requirements of aircraft brake anti-skid control, the present invention proposes an electro-hydraulic pressure servo valve

Method used

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  • Electric hydraulic pressure servo valve

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Embodiment Construction

[0025] As shown in Figure 1. This embodiment is an electro-hydraulic pressure servo valve, which is obtained by improving and integrating the existing technology.

[0026] This embodiment includes an electro-hydraulic pressure servo valve oil inlet 1, a throttle 2, an inlet oil filter 3, an oil inlet pressure sensor 4, an oil return electromagnetic valve 5, a brake port oil filter 6, and an electro-hydraulic pressure servo valve brake port 7. Brake port pressure sensor 8, electro-hydraulic pressure servo valve oil return port 9, one-way valve 10, safety valve 11, hydraulic control valve 12, slide valve 13, and torque motor 17. Said components are integrated on the casing 18 and connected through corresponding oil passages.

[0027] The torque motor 17 adopts the prior art and is fixed on one side of the housing 18 . Both ends of the nozzle 16 in the torque motor communicate with the upper outlets of the throttle holes 14 at both ends of the torque motor oil filter through oi...

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Abstract

The invention relates to an electric hydraulic pressure servo valve, wherein two ends of a nozzle in a torque motor are respectively communicated with two ends of a slide valve control cavity through the outlet of a throttling hole; the brake port of the electric hydraulic pressure servo valve is communicated with that of a slide valve; a brake port oil filter is connected in series between the brake ports of the slide valve and the electric hydraulic pressure servo valve; the oil inlet of a brake port pressure sensor is connected to an oil path between the brake port of the slide valve and the oil inlet of the brake port oil filter; a throttler is arranged between the oil inlet of the electric hydraulic pressure servo valve and an inlet oil filter; the oil inlet of an oil inlet pressure sensor is communicated with the oil path of the inlet oil filter; the oil inlet of a hydraulic control valve is communicated with that of the slide valve; the control cavity of the hydraulic control valve is communicated with the oil path of the oil return port of the slide valve; and the oil outlet of the hydraulic control valve is also communicated with the oil path of the oil return port of the slide valve. According to the electric hydraulic pressure servo valve, the damage caused by pollutants in oil fluid is prevented effectively, so that the working stability and the working reliability of the servo valve are improved; and the inlet pressure signal and the outlet pressure signal of the servo valve can be provided, so that the working stability and the working reliability of the servo valve are improved.

Description

technical field [0001] The technical invention relates to an electro-hydraulic pressure servo valve for controlling pressure of an aircraft brake system. Background technique [0002] The basic components of modern aircraft electronic anti-skid braking system include wheel speed sensor, electronic anti-skid braking control box and anti-skid control accessories. In order to meet the control requirements, in the aircraft wheel brake system, the electronic anti-skid brake system usually uses an electro-hydraulic pressure servo valve as an anti-skid control accessory to precisely control the wheel brake pressure, prevent tires from bursting, and shorten the braking distance. The electro-hydraulic pressure servo valve is mainly composed of the electric part of the torque motor and the hydraulic components of the spray valve and slide valve. Generally, the electro-hydraulic pressure servo valve adopts a double-nozzle flapper valve and a double-slide valve structure. In addition,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C25/46B60T8/1761B60T15/36
Inventor 何永乐马建峰
Owner XIAN AVIATION BRAKE TECH
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