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Fuel oil leakage detection system of civil aviation passenger plane and detection method

A leak detection and fuel system technology, applied in the testing of machine/structural components, measuring devices, fluid tightness testing, etc. It can solve problems such as time-consuming, leakage, and need for personnel to enter the fuel tank, avoiding professional and complex operations. Effect

Active Publication Date: 2020-03-17
四川泛华航空仪表电器有限公司
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it requires personnel to enter the tank and is time consuming
Also requires specialized equipment and qualified personnel for leak testing

Method used

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  • Fuel oil leakage detection system of civil aviation passenger plane and detection method

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0031] The on-board fuel system remote interface unit 400 in the present invention adopts the on-board fuel system remote interface unit 400 disclosed in the patent CN 105329450 A. Aircraft fuel tank comprises wing outer fuel tank 200, wing inner fuel tank 300 and ventilation fuel tank 100; Nitrogen generator 1 is the air separation device that is communicated with air, the nitrogen in the air is separated, and fills into each fuel tank of aircraft through vent pipe.

[0032] Such as figure 1 As shown, the civil aviation airliner fuel leakage detection system includes nitrogen generator 1, ventilation pipe, main electric valve 3, slave electric valve 6, position sensor 7, full fuel signal device 5, check valve 8, pressure sensor 4, safety valve 10. Manual valve 9.

[0033]Among them, the master electric v...

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Abstract

The invention, which relates to the technical field of airplane fuel oil detection, discloses a fuel oil leakage detection system of a civil aviation passenger plane. The system comprises a nitrogen generator, a ventilation pipeline, a main electric valve, a slave electric valve, a position sensor, a full oil annunciator, a one-way valve, a pressure sensor, a safety valve and a manual valve. In addition, the invention further discloses a fuel oil leakage detection method of a civil aviation passenger plane. According to the detection method, nitrogen is inflated into oil tanks at the outer side and the inner side of a wing to realize the pressure boosting of the oil tanks at the outer side and the inner side of the wing when an airborne fuel oil system remote interface unit detects that awheel load signal is effective, all fuel valves are closed, a fuel booster pump does not work, the fuel tank is not in a maximum full fuel quantity state, the engine does not work, the APU does not work and the slave electric valve in the ventilation fuel tank is closed; and a regular changing rate of the pressure is measured to obtain the fuel oil leakage conditions of the oil tanks at the outerside and the inner side of the wing. Therefore, the oil tank does not need to be emptied and manpower required for oil tank leakage condition detection is reduced.

Description

technical field [0001] The invention relates to the technical field of aircraft fuel oil detection, in particular to a fuel oil leakage detection system and a detection method of a civil aviation airliner. Background technique [0002] There are many reasons for fuel tank leakage of civil aviation aircraft, such as excessive fuel tank structural deformation, cracking of sealant, aging of sealant, accidental damage, incorrect riveting of rivets and so on. Fuel leaking from a fuel tank can be ignited by different ignition sources with disastrous consequences for the flight, so it is important to detect any form of fuel leak before the aircraft takes off. [0003] Among the aviation accidents that have been recorded, several accidents were caused by fuel leakage in the fuel tank, and even the latest aircraft Boeing 787 had a fuel leakage accident. Fuel leakage accidents not only caused an emergency landing of the aircraft, but also caused fires and catastrophic consequences wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/32
CPCG01M3/3236
Inventor 薛双喜邱遥远牛满江
Owner 四川泛华航空仪表电器有限公司
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