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Gas composition verification device based on lightening test of aircraft fuel system

A fuel system and verification device technology, which is applied in the field of lightning test of aircraft fuel system, can solve the problems of inaccurate gas ratio verification results and failure to provide gas ratio, so as to improve accuracy and stability, reduce influence, and reduce gas Evenly distributed effect

Pending Publication Date: 2017-09-29
熊秀
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Problems solved by technology

[0004] The existing aircraft lightning test standard documents RTCA / DO-160G and SAE ARP5416A, etc., all have detailed descriptions of combustible gas preparation methods and electric spark generation methods, but do not provide specific implementation methods for gas ratio verification, and do not describe the verification process. Consider the analysis of the above problems, which may lead to inaccurate verification results of the gas ratio

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  • Gas composition verification device based on lightening test of aircraft fuel system

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] The present invention is based on the gas proportion verification device of the lightning test of the aircraft fuel system, such as figure 1 As shown, it includes a cube-shaped housing, which is divided into a sampling chamber 1, a partition 13 and an electric spark source 2 sequentially from top to bottom along the longitudinal direction of the housing; The pressure port b9, the upper surface of the sampling chamber 1 is provided with a pressure relief port a8, and the side of the sampling chamber 1 is also provided with an inflation pipeline 6 and an exhaust pipeline 7; Electrode 3 and Capacitor 4.

[0024] The sampling chamber 1 samples and stores the gas used in the test. The sampling chamber 1 has explosion-proof performance. The sampling chamber 1 is preferably a cube structure, and the volume of the sampling chamber 1 is 30-200...

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Abstract

The invention discloses a gas composition verification device based on a lightening test of an aircraft fuel system. The device comprises a shell in a cubic shape, and a sampling cavity, a partition plate and an electric spark source are arranged in the shell in the vertical direction from top to bottom; pressure relief openings b are formed in every side surface on the periphery of the sampling cavity, a pressure relief opening a is formed in the upper surface of the sampling cavity, and an inflation pipe and an exhaust pipe are arranged on the side surfaces of the sampling cavity; the electric spark source comprises a power supply, discharge electrodes and a capacitor. By means of the verification device, the influence of stray capacitance on an electric spark is reduced, and the accuracy and stability of electric spark energy are improved; through the inflation pipe and the exhaust pipe, full gas change of a combustible gas in the sampling cavity is achieved, gas distribution is even, and gas leakage is unlikely to occur; pressure is relieved through the pressure relief opening a and the pressure relief openings b, so that safety of a worker and test equipment is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of lightning test of aircraft fuel system, and in particular relates to a gas ratio verification device based on lightning test of aircraft fuel system. Background technique [0002] Lightning test is an important test for aircraft to obtain airworthiness certification. In the lightning test of the aircraft fuel system, the flammable mixture of hydrogen, oxygen and argon is generally used to simulate the flammable environment in the fuel tank, and the gas ratio must meet the ignition probability of more than 90% under the electric spark of 200uJ energy . The test standard requires the use of a 200uJ energy electric spark source to verify the accuracy of the gas ratio. The electric spark is generated based on the principle of capacitor charging and discharging to break down the electrode gap. [0003] Since the ignition energy and ignition probability of the electric spark determine the ratio of combustible...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64F5/60
CPCB64F5/60
Inventor 姚永杰谢健熊秀范晓宇
Owner 熊秀
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