System and method for detecting leakage of high-temperature gas in high-temperature high-pressure guide pipe of airplane

A high-temperature, high-pressure, high-temperature gas technology, applied in the field of high-temperature gas leakage detection systems, can solve the problems of false alarms of thermal insulation layers, complicated wiring, and difficulty in judging leakage, and achieve the effects of ensuring flight safety, improving dispatch rate, and high reliability.
CN102162765BInactive Publication Date: 2012-06-06NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2012-06-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a system and a method for detecting leakage of a high-temperature gas in a high-temperature high-pressure guide pipe of an airplane, and belongs to the field of high-temperature high-pressure gas leakage detection. The method is characterized by comprising the following processes that: (1) when the high-temperature gas is leaked from the guide pipe, the ambient temperature around the guide pipe is raised quickly; and due to the heating action of the gas, the resistance value of a thermistor is changed rapidly along the raising of the temperature so as to judge whether the gas is leaked; and (2) according to the theory, the variations of the resistance values of the ends AB, AD, CB, CD, AC and BD are detected at the same time; and if the resistance values of three ormore paths are different from the rated values, the gas in the area is leaked. Compared with other detection systems, the system has the advantages of simple structure, high reliability and the like,and can synchronously realize leakage judgment and position location of the high-temperature gas guide pipe of the air plane of other high-temperature gas pipelines. The leakage detection system has great significance for guaranteeing the flying safety and improving the running dispatch rate of the air plane.
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Description

Technical field

[0001] The invention relates to a high-temperature gas leakage detection system and method in an aircraft high-temperature and high-pressure conduit, belonging to the field of high-temperature gas leakage detection. Background technique

[0002] Air management system is one of the important airborne equipment of the aircraft. Its function is to adjust the air for the cockpit and electronic equipment to meet its cooling, heating, pressurization and anti-icing requirements. It mainly includes bleed air, cabin pressure and temperature regulation, and air distribution. , engine and wing anti-icing subsystems, all systems are cross-linked through air ducts. Since the high-temperature and high-pressure gas flows in the duct, mechanical stress and thermal stress will be applied to the duct; at the same time, the connecting parts between the duct and the fuselage will also transmit the displacement and vibration caused by the change of the aircraft load distribution ...

Claims

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