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Equipment ventilation hole

A ventilation hole and equipment technology, which is applied in the field of electromagnetic shielding design of airborne equipment, can solve the problems that affect the normal operation of the equipment, the electromagnetic compatibility of the whole machine, and the difficulty of passing the electromagnetic compatibility experiment of the equipment, etc., and achieve simple structure, economical and practical, and good shielding efficiency Effect

Inactive Publication Date: 2017-05-24
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, no shielding measures are taken for the ventilation holes of aircraft equipment, which makes it difficult to pass the electromagnetic compatibility test of the equipment, affecting the normal operation of the equipment and the electromagnetic compatibility of the whole aircraft

Method used

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  • Equipment ventilation hole
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Embodiment Construction

[0013] like figure 1 , 2 Shown, the present invention offers the hole of diameter D=φ4mm by a piece of 1mm thick, 56mm * 56mm galvanized sheet steel, 8 * 8 is evenly distributed, totally 64, and the center distance of adjacent hole is 6mm. The four corners are connected to the equipment vent structure with M3 screws, which can meet the design requirements of ventilation and equipment electromagnetic compatibility. The shielding effectiveness is as follows.

[0014] Equipment Vent Shielding Effectiveness

[0015] frequency 100MHz 1000MHz 10000MHz Shielding effectiveness 52.34dB 32.34dB 13.19dB

[0016] After calculation, the cut-off frequency of the present invention is 44GHz:

[0017]

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PUM

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Abstract

The invention belongs to the technical field of airborne equipment electromagnetic shielding design, and provides an equipment ventilation hole. 64 (8*8) holes with the diameter D=phi 4mm are arranged in a 1mm-thick and 56mm*56mm galvanized steel sheet, and the centre-to-centre distance of two adjacent holes is 6mm. The four corners are connected with the equipment ventilation hole structure by M3 screws. At present, as aircraft equipment ventilation holes are not shielded, it is difficult for equipment to pass electromagnetic compatibility test, and normal work of equipment and electromagnetic compatibility of the whole machine are affected. The equipment ventilation hole of the invention is simple in structure, reliable in connection, economical and practical, and good in shielding effectiveness, can meet the requirement of equipment electromagnetic compatibility design, and can be widely used in electromagnetic shielding design of airborne equipment ventilation holes.

Description

technical field [0001] The invention belongs to the electromagnetic shielding design technology of airborne equipment, and relates to air vents of aircraft airborne equipment. Background technique [0002] At present, the ventilation holes of aircraft equipment are not shielded, which makes it difficult to pass the electromagnetic compatibility test of the equipment, which affects the normal operation of the equipment and the electromagnetic compatibility of the whole aircraft. Therefore, measures must be taken for the vents to meet the EMC requirements. Contents of the invention [0003] The purpose of the invention is to: [0004] The invention provides an equipment ventilation hole, which is simple in structure, reliable in connection, economical and practical, has good shielding efficiency, and can be widely used in airborne equipment ventilation holes. [0005] Technical scheme of the present invention is: [0006] An equipment vent comprising: [0007] A piece of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K5/02H05K9/00
CPCH05K5/0213H05K9/0007
Inventor 何大龙冯立新李海龙
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA