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Exhaust device

A technology of exhaust device and mounting plate, applied in the direction of fuel tank safety measures, can solve problems such as poor stealth effect of aircraft, and achieve the effect of ensuring electromagnetic performance

Inactive Publication Date: 2018-11-23
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of poor stealth effect of the aircraft caused by the need to connect the oil-free space inside the fuel tank and the external atmospheric environment through the vent pipe protruding from the surface skin of the aircraft when designing the ventilation function of the existing fuel tank, the invention provides a Exhaust

Method used

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] An exhaust device of the present invention is composed of a diffuser pipe 1 and a mounting plate 2 , the diffuser pipe 1 is an inner hollow structure, one end is a straight pipe section, and the other end is a bell mouth 4 . The mounting plate 2 is provided with a ventilation hole 5 and a mounting hole 3, the mounting hole 3 is used to connect the exhaust device with the aircraft surface skin structure, and the ventilation hole 5 is used to communicate with the fuel tank ventilation pipeline and the external atmospheric environment to realize Fuel tank vent function. The bell mouth 4 end of the diffuser tube 1 and the mounting plate 2 are combined into a whole through welding, and the vent hole 5 is located in the inner cavity of the bell mouth 4 after welding.

[0015] The straight pipe section end of diffusion pipe 1 is 1mm larger than the out...

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Abstract

The invention discloses an exhaust device. The exhaust device includes multiple diffuser tubes and a mounting plate, each diffuser tube is composed of a straight tube segment and a horn opening, eachstraight tube segment is connected with a fuel tank venting pipe, each horn opening is fixedly connected to the mounting plate, and multiple vent holes communicated with the diffuser tubes are formedin the mounting plate. The diameter of each vent hole is smaller than 5 mm. The exhaust device fits the surface skin of an airplane to achieve connection with the fuel tank venting pipe, and the circulation area of the combined vent holes is far more greater than the sectional area of the fuel tank venting pipe, low resistance of gas circulation is ensured, the problem that the venting functionaldesign of existing fuel tanks needs vent holes to stretch out of the surface skin of airplanes is solved, and meanwhile the electromagnetic performance requirements for the vent holes can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of aircraft fuel systems, and more specifically, relates to an exhaust pipe used in the communication between the fuel tank of the fuel system and the outside atmosphere. Background technique [0002] The fuel tank in the aircraft fuel system is a closed space. During the flight of the aircraft, as the aircraft climbs or slides, the pressure of the external environment where the aircraft is in drops or rises. At this time, the gas pressure in the oil-free space in the fuel tank will Relative to the pressure change of the external environment, the fuel tank is in a positive or negative pressure state, which is not conducive to the safety of the fuel tank under pressure. In the design of the aircraft fuel system, it is necessary to connect the oil-free space of the fuel tank with the external environment through the ventilation pipeline, which is beneficial to exhaust the fuel tank to the external atmosphere w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64D37/32
CPCB64D37/32
Inventor 金若姚小轶李扬易春兰丁健
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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