Retracting control system of aircraft landing gear

A technology of aircraft landing gear and control system, applied in the direction of the chassis, etc., can solve the problems of failure of emergency release method and stuck main valve core, etc.

Inactive Publication Date: 2017-05-24
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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  • Abstract
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Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to solve the problem that the main valve core of the old aircraft is stu

Method used

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  • Retracting control system of aircraft landing gear
  • Retracting control system of aircraft landing gear
  • Retracting control system of aircraft landing gear

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Embodiment Construction

[0011] The present invention will be described in further detail below.

[0012] The present invention proposes an improved undercarriage retractable system, such as figure 2 As shown, the emergency oil discharge valve is connected to the working pipeline downstream of the solenoid valve; during emergency operation, the oil inlet of the emergency oil discharge valve is closed. When adopting this kind of structure, no matter whether the main valve core of the retractable solenoid valve is stuck in the retracted position or not, the high-pressure gas from the emergency gas source will make the emergency oil discharge valve switch to the emergency position, such as image 3 shown. In this way, the pipeline from the retractable outlet of the retractable solenoid valve to the retractable control system is cut off at the emergency oil discharge valve. Even if the main valve core of the retractable solenoid valve is stuck in the retracted position, there will be no high pressure T...

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Abstract

The invention discloses a retracting control system of an aircraft landing gear. An emergency oil discharging valve is connected onto a working pipeline at the downstream side of a solenoid valve; and in an emergency working process, an oil inlet of the emergency oil discharging valve is sealed. According to the retracting control system, a fault mode that emergency releasing of the landing gear is invalid, caused by the fact that the retracting solenoid valve is clamped in a retracting position, is avoided from the design; changes of the retracting control system are very small, and parts below the emergency oil discharging valve are not changed; new onboard equipment is not additionally arranged; the implementation cost of an improvement plan on an aircraft is small; and the improvement plan is easy to implement on the aircraft.

Description

technical field [0001] The invention belongs to the technical field of aircraft structure design, and in particular relates to an aircraft landing gear retraction control system. Background technique [0002] Such as figure 1 As shown, the emergency oil discharge valve in the landing gear retraction system of a certain type of aircraft in the early stage is connected to the main oil return pipeline after the solenoid valve. There are certain defects in this connection method. When the main valve core is stuck at the pressure supply position of the retracting pipeline due to its own failure or the excess in the oil, all emergency release methods will fail. [0003] The present invention proposes an improved aircraft landing gear retraction control system, which avoids the failure mode of landing gear emergency release failure caused by the retraction solenoid valve stuck in the retracted position from the design; the retraction control system has little change , everything ...

Claims

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Application Information

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IPC IPC(8): B64C25/22B64C25/30
CPCB64C25/22B64C25/30
Inventor 王子瑾李欣刘泽华魏张斌秦成江飞鸿
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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