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Airtight test method for pressure refueling pipeline of aircraft wing fuel tank

A wing oil tank and test method technology, applied in the liquid tightness measurement using liquid/vacuum degree, by detecting the appearance of fluid at the leakage point, and by measuring the increase and deceleration rate of the fluid, etc., can solve the hidden danger of leakage and difficult system Air tightness test, threats to flight safety and other issues to achieve the effect of ensuring flight safety and eliminating hidden dangers of leakage

Inactive Publication Date: 2016-12-07
HARBIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The end of the above-mentioned pressure refueling pipeline is a diffusion port, which cannot be blocked. Therefore, it is difficult to conduct a system airtightness test after the pressure refueling pipeline is assembled. Although the airtightness test of the components has been carried out before the final assembly, the There may still be hidden dangers of leakage, threatening flight safety

Method used

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  • Airtight test method for pressure refueling pipeline of aircraft wing fuel tank
  • Airtight test method for pressure refueling pipeline of aircraft wing fuel tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Connect the pressure refueling joint 1 to the test air source with a pressure gauge, turn on the air intake switch of the test air source, gradually increase the pressure to 1.242Mpa, then cut off the air intake switch of the test air source, keep the pressure for 5 minutes, and the pressure gauge If the indicated value does not drop, it means that there is no leakage in the pressure refueling pipeline, and the airtight test of the pressure refueling pipeline in the wing fuel tank is over.

Embodiment 2

[0024] Connect the pressure refueling joint 1 to the test air source with a pressure gauge, turn on the air intake switch of the test air source, pressurize to 1.242Mpa, then cut off the air intake switch of the test air source, and keep the pressure for 5 minutes. The indication value of the medium pressure gauge drops, indicating that there is leakage in the pressure refueling pipeline. At this time, use a brush dipped in neutral soapy water to smear on the connection parts in turn to check the leaking parts; during the inspection, it is found that the flexible joint 21c is leaking, and the flexible joint 21c is decomposed. If the sealing ring is found to be damaged at the joint, replace the sealing ring. Carry out the airtightness test of the pressure refueling pipeline of the wing fuel tank according to the method described in step 1. Keep the pressure for 5 minutes. If the indication value of the pressure gauge does not drop, it means that there is no leakage in the pressur...

Embodiment 3

[0026] Connect the pressure refueling joint 1 to the test air source with a pressure gauge, turn on the air intake switch of the test air source, pressurize to 1.242Mpa, then cut off the air intake switch of the test air source, and keep the pressure for 5 minutes. The indication value of the medium pressure gauge drops, indicating that there is a leak in the pressure refueling pipeline. At this time, use a brush to dip in neutral soapy water to smear on the connecting parts in sequence. Smear soapy water on the conduits one by one. Check that there is air leakage at the welding bead of the conduit. Decompose the leaking parts and repair them. After the parts are repaired, perform the airtightness test of the pressure refueling pipeline of the wing fuel tank according to the method described in step 1. Keep the pressure for 5 minutes, if the indication value of the pressure gauge does not drop, it means that there is no leakage in the pressure refueling pipeline, and the airtig...

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Abstract

The invention belongs to the aircraft wing fuel tank pressure refueling technology and relates to a Y12F aircraft wing fuel tank pressure refueling pipeline airtightness test method. The aircraft wing fuel tank pressure refueling pipeline airtightness test method is characterized by carrying out seal processing on an aircraft wing fuel tank pressure refueling pipeline; and carrying out airtightness test on the aircraft wing fuel tank pressure refueling pipeline. The Y12F aircraft wing fuel tank pressure refueling pipeline airtightness test method provided in the invention helps to eliminate leakage hidden trouble of the pressure refueling pipeline after final assembly, and thus flight safety is ensured.

Description

technical field [0001] The invention belongs to the pressure refueling technology of an aircraft wing fuel tank, and relates to an airtight test method for a pressure refueling pipeline of an aircraft wing fuel tank. Background technique [0002] The aircraft wing fuel tank pressure refueling system is a refueling technology that quickly refuels the aircraft wing fuel tank by connecting the aircraft pressure refueling joint with the refueling vehicle and relying on the refueling pressure generated by the refueling vehicle. For the structural diagram of the pressure refueling pipeline of the wing fuel tank of the Yun 12F aircraft, see figure 1 . The pressure refueling pipeline of the wing fuel tank of Yun 12F aircraft consists of the left fuel tank section on the left side of the left 2 rib, the right fuel tank section on the right side of the right 2 rib, the non-fuel tank section between the left 2 rib and the right 2 rib, and the refueling main pipe section Connection co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/28G01M3/14
Inventor 安杨孙艳升
Owner HARBIN
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