Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of stabilizing propelling bullet support for air cannon and its design method

A design method and air cannon technology, applied in the direction of sustainable transportation, launching devices, etc., can solve the problems of large gap leakage, unstable propulsion, and impact on the propulsion efficiency of the ordinary bullet rest, and reduce the design and mechanical processing. Difficulty, reduce loss, and ensure the effect of stable launch

Active Publication Date: 2022-05-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the friction between the bullet holder and the gun barrel, in addition, impurities and processing defects on the outer wall of the bullet holder and the inner wall of the gun barrel easily interfere with each other when the gap is small, resulting in unstable propulsion. The gap leakage of the support is large, which affects the propulsion efficiency of the support. Therefore, it is urgent to develop an efficient and stable propelling support and its design method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of stabilizing propelling bullet support for air cannon and its design method
  • A kind of stabilizing propelling bullet support for air cannon and its design method
  • A kind of stabilizing propelling bullet support for air cannon and its design method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The present embodiment is an embodiment of the elastic support structure.

[0029] Please combine Figures 2 through 4 As shown, the present invention discloses an air cannon with a stable propulsion stock, the stock is applied to the air gun and carries a projectile. The stock comprises a cylindrical stock body, the outer surface of the stock body is provided with at least one annular groove, the annular groove is arranged circumferentially on the stock body.

[0030] Specific instructions are, for example Figure 2 , the support body 1 has three parallel and uniformly arranged annular grooves 2, and the width and depth of the three annular grooves 2 are the same. The bomb tray structure is numbered B structure in the present embodiment. as Figure 3 The support body 1' has four parallel annular grooves, and two of the annular grooves 21' are the same width and depth, and the other two annular grooves 22' are wider than the other two. The support structure is numbered C struc...

Embodiment 2

[0033] The present embodiment is an embodiment of a design method for a support structure.

[0034] Please combine Figure 6 As shown, the design method of the air cannon with a stabilized propulsion stock in the present invention, comprising the following steps:

[0035] (1) Given the initial design parameters, design several kinds of magazines, and the number of grooves and the width of the grooves on each stock are different;

[0036] (2) Through the analysis modeling, calculation and analysis of the gap leakage amount of several different types of stocks, the leakage amount of different stocks is obtained;

[0037] (3) Compared with the leakage amount of each stock, the type of stock with the smallest leakage is used as the initial design configuration;

[0038] (4) Set the leakage index of the initial design configuration of the ammunition tray as the initial target parameter for further iteration;

[0039] (5) Given the design parameters of the geometric shape of the elastic ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a stable propelling bullet holder for an air cannon and a design method thereof. By processing grooves of different numbers and sizes on the outer side of a cylindrical bullet holder, the leakage amount of the gap in which the bullet holder moves in the gun barrel is reduced, and leakage can be made in the same gap. Increase the gap between the bullet holder and the barrel, thereby reducing the movement instability caused by the interference of the outer wall of the bullet holder and the inner wall of the barrel due to processing, impurities, etc., reducing the loss of the bullet holder when firing under the same firing pressure, and reducing the difficulty of design and machining , to ensure the stable launch of the bullet holder; by formulating the objective function of the gap leakage index, iterate and calculate the two-dimensional bullet holder contour curve, so as to obtain the two-dimensional contour of the bullet holder corresponding to the design gap leakage rate index parameters, so as to design a stable Advance flick geometry. The bullet rest and related design methods can provide efficient and stable propulsion test technology support for various air cannon tests.

Description

Technical field [0001] The present invention relates to the technical field of air cannon firing test device, in particular the stock used in the air cannon firing test. Background [0002] In the aircraft engine components bird, ice impact, foreign object swallowing, blade loss, receiver containment target, or other impact dynamics tests, it is necessary to use the air cannon to launch projectile impact target technology, in order to ensure the adaptation of different types, different sizes, different shapes of projectiles and the inner wall of the air cannon, and as far as possible to ensure the stability of the projectile acceleration process. For example, the magazine stock recorded in the Chinese patent ZL 201310574270.9 adopts the cylindrical shape of the hollow stock as a bullet-gun matching equipment. However, due to the friction between the stock and the barrel, in addition, the outer wall of the stock and the inner wall of the barrel impurities, processing defects, etc....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F41F1/00
CPCF41F1/00Y02T90/00
Inventor 罗刚刘璐璐陈伟杨飞赵振华马驰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS