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A deflected jet brake pressure servo valve

A servo valve, jet-type technology, applied in the field of brake pressure servo valve, can solve the problems of poor anti-pollution ability, achieve the effect of improving anti-pollution ability, improving anti-pollution ability, and improving reliability

Active Publication Date: 2018-10-19
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the shortcomings of poor anti-pollution ability existing in the prior art, the present invention proposes a deflecting jet type brake pressure servo valve

Method used

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  • A deflected jet brake pressure servo valve
  • A deflected jet brake pressure servo valve
  • A deflected jet brake pressure servo valve

Examples

Experimental program
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Effect test

Embodiment Construction

[0030] This embodiment is a deflector jet brake pressure servo valve

[0031] The deflected jet pressure servo valve is mainly composed of a motor assembly and a slide valve assembly. The motor seat 6 of the motor assembly and the valve body 1 of the slide valve assembly are fixedly connected by bolts. The motor assembly is located in the protective cover 20, and the protective cover is fixed on the upper surface of the motor seat through a flange.

[0032] Such as figure 1 As shown, the motor assembly is mainly composed of a motor base 6, an armature assembly, an upper magnet guide 14, a lower magnet guide 18, a magnetic steel 17, a coil 15, a jet disc 8, an upper jet cover 9, and a lower jet cover 7, among which The armature 16, the magnetic steel 17, the upper magnetic conductor 14 and the lower magnetic conductor 18 form a bridge-type magnetic circuit with four working air gaps.

[0033] The armature assembly includes an armature 16 , a spring tube 11 , a transmission r...

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Abstract

The invention discloses a deflected jet-type brake pressure servo valve. A deflector rod jet hydraulic amplifier is used as a prestage, a deflector rod is driven by a torque motor, a high-speed fluid jet by a jet disc is guided to cover areas of two receiving holes, the pressure of the receiving hole of which the cover area is increased is increased, the pressure of the receiving hole of which the cover area is reduced is reduced, two ends o a valve core generate a control pressure difference to push the valve core to move so as to output a brake pressure, and the brake pressure is also guided to the end opposite to the movement direction of the valve core through an oil passage in the valve, so that pressure feedback is finished. The minimum size of the prestage of the deflected jet-type brake pressure servo valve is one magnitude order larger than a nozzle flapper hydraulic amplifier, so that the anti-pollution capability is improved. In addition, compared with a jet pipe servo valve, the deflected jet-type brake pressure servo valve is relatively high in flow and pressure recovery, and thus, the valve core with a relatively large diameter can be selected, the driving force of the valve core is large, and the control precision is further controlled.

Description

technical field [0001] This product relates to the field of aircraft anti-skid braking system. It is a brake pressure servo valve with permanent magnet torque motor as electromechanical conversion, deflector jet as pre-stage, and slide valve as power stage. Background technique [0002] As the research and application of electronic anti-skid braking system technology becomes more and more mature, almost all aircrafts have installed this system. Proportional to brake pressure. Because the servo valve has better response speed, control accuracy and reliability, it has an important impact on the normal operation of the brake system. [0003] The servo valve used in the electronic anti-skid brake system is a brake pressure servo valve with double nozzles as the pre-stage. The pre-stage of this servo valve is composed of a torque motor, an orifice, a nozzle, a baffle, etc. When the current passes through, the armature deflects under the action of electromagnetic force, which dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02F16K31/06F16K3/08
CPCF15B13/02F16K3/085F16K31/0668F16K31/0675
Inventor 何学工王江涛康晓妮李硕闵丽
Owner XIAN AVIATION BRAKE TECH
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