摘要本毕业设计独立完成了某大口径狙击步枪消焰器的设计。该课题紧密联系自动武器膛口装置的研究设计和创新，具有重要的使用价值、现实意义和良好的应用前景。经过大量的前期工作，查阅中英文文献资料，学术期刊，了解消焰器国内外的发展概况和前景，认真着手理论分析，为关键的方案设计做了充分的准备。本文运用空气动力学、内弹道学等专业知识，通过分析比较多种消焰器的原理特点，最终完成了四种方案设计，确定了结构与尺寸。在此过程中，经过严谨的理论分析，使得所设计的四种不同结构的消焰器都获得了合理的结构尺寸和良好的消焰效果。应用AutoCAD,SolidWorks进行了所设计的消焰器实体造型和部分图纸的绘制，使得所设计的产品更加直观立体准确地展现在我们的眼前。59843

毕业论文关键词  大口径狙击步枪  消焰器  AutoCAD  SolidWorks

毕业设计说明书（论文）外文摘要

Title    Design of flash hider of automatic weapon                      

This graduation design completed the flash hider design of a large caliber sniper rifle. The subject is closely connected with automatic weapon muzzle device research, design and innovation, and has important use value, practical significance and good application prospect. After a lot of previous work, literature investigation both in English and Chinese, academic journals, understanding the current development situation and prospects of both at home and abroad, the serious theoretical analysis was conducted, which made full preparations for the important scheme design. In this paper, using the aerodynamics, interior ballistics and other professional knowledge, through analyzing the characteristics and principle of different kinds of flash hiders, four kinds of scheme design of flash hiders and the corresponding structures and dimensions were finally completed. In the process, after careful theoretical analysis, the designed four different kinds of flash hiders have the reasonable structure and size, good flame suppression effect. SolidWorks was used for entity model, and AutoCAD was used for part of 2D drawings, which make the design more intuitive, three-dimensional accurate presented in front of our eyes.

Keywords   large caliber sniper rifle  flash hider   AutoCAD  SolidWorks

1  引言1

1.1  消焰器研究背景及意义1

1.1.1  研究背景1

1.1.2  研究意义2

1.2  国内外现状及发展方向2

1.2.1  国内外现状2

  1.2.2  发展方向3

1.3  课题内容及任务简介3

2  膛口焰产生和消焰器原理及类型3

2.1  膛口焰的产生3

2.2  消焰器的工作原理4

2.3  消焰器的基本类型4

3  消焰器总体方案设计8

3.1  本文所要设计消焰器相匹配的枪型的选择8

3.2  某大口径狙击步枪的相关参数8

3.3  相关参数计算8

3.3.1  变容情况下的火药气体状态方程8

3.3.2  某大口径狙击步枪膛内火药气体温度的计算9

3.3.3  某大口径狙击步枪膛内火药气体压力的计算10

3.4  某大口径狙击步枪消焰器的总体方案确定11

3.4.1  圆柱形消焰器方案剖析 12

3.4.2  筒形消焰器方案剖析12

3.4.3  圆锥形消焰器方案剖析12

4  某大口径狙击步枪消焰器设计13

4.1  圆锥形消焰器的设计13

4.1.1  超声速气流在平滑膨胀管道中的流动13

4.1.2  圆锥形消焰器的降温问题17