Gunship transparent part fastening structure with explosion preventing and buffering functions and fastening method

Abstract

An armed helicopter transparent component fastening structure and fastening method for blast-defense and impact-attenuation, comprising: a mounting frame body (1) and, affixed by means of the mounting frame body (1) to the helicopter main body (5), a transparent cockpit component (2); the mounting frame body (1) is provided with a first mounting groove (10); a lateral edge of the transparent cockpit component (2) is inserted into the first mounting groove (10); a lateral edge structure of the transparent cockpit component (2) is combined with an annular frame body (3); a mutually-supporting mounting structure is formed between the frame body (3) and the first mounting groove (10); the frame body (3) includes a compression component (31) and a fastening component (32); by means of the combined compression of the compression component (31) and the fastening component (32) of the transparent cockpit component (2), pre-stressing force is produced, thus fastening the transparent cockpit component (2). The present fastening structure is very strong, and has a wide range of application.

Description

technical field [0001] The invention relates to a military helicopter in the field of national defense construction, in particular to a fastening structure and a fastening method for a transparent part of an armed helicopter cockpit. Background technique [0002] The cockpit transparent parts of the armed helicopter mainly include fixed front windshield transparent parts and movable top or side windshield transparent parts, etc., and the cockpit transparent parts, as important optical structural parts on the armed helicopter, must have the following functions: firstly, it is called As a structural part, it must have sufficient strength to resist external impact loads, such as bullet shooting, explosion impact, bird impact, etc.; secondly, as a transparent observation window, it must have good optical properties, including light transmittance, haze, Resolution, optical angle deviation, optical distortion, ghosting, binocular parallax, birefringence and many other important pe...

AI Technical Summary

Problems solved by technology

[0006] 1. The manufacturing process of armed helicopters has high requirements on the processing technology of the transparent parts of the cockpit. Once there is a small error in the processing size or radian of the transparent parts of the cockpit, it will affect its fit with the fuselage frame; or on the transparent parts of the cockpit The center of the bolt hole is not completely aligned with the center of the corresponding hole on the fuselage frame; or there are defects such as cracks, gaps, and poor polishing in the bolt holes opened on the transparent part of the cockpit. The above situations will directly lead to difficulties in the installation of the transparent part of the cockpit. 1. There is stress concentration after installation, and the interchangeability of transparent cockpit products is poor;

[0007] 2. There are more or less defects or residual stresses in the transparent parts of the cockpit in the process of manufacturing and processing, which may cause the defects or stress to gradually increase during the process of transportation, storage or assembly. If they are not discovered in time and effectively repaired Disposal or scrapping, once the cockpit transparent part cracks, its tensile strength and impact toughness will be significantly reduced, which will bring great safety hazards to future use;

[0008] 3. The initial internal stress balance of the cockpit transparent part has been destroyed by opening holes in the cockpit transparent part, and the vicinity of the screw holes has become a weak link in strength. In addition to possible superimposed processing defects and assembly stress, the cockpit transparent part is easy to Cracks are not only hidden dangers but also a severe test for maintenance work

[0012] However, with the progress of the times, armed helicopters are becoming more and more important in the country's military strength. If there is no reasonable solution to the above problems, the development and progress of armed helicopters will also be affected.

For such important issues related to the country's military strength, there is no reasonable solution at present, and the present invention fills up the gap in this field

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