Helical Gun Barrel with Sound Reflection Chambers
Solution Overview
Problem
Conventional gun silencers degrade the ballistic performance of bullets by interfering with the rifling-induced spin due to internal compressed gas vortices and currents, which are not effectively managed by existing sound suppression configurations.
Innovation Solution
A gun barrel design featuring a circumferential array of helically extending lands and sound reflection chambers that coordinate sound damping with bullet spin reinforcement, directing gas currents to complement the spin rather than interfere with it, while maintaining effective sound suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional sound reflection chambers are used in gun silencers, then sound suppression is achieved, but bullet spin is degraded due to internal compressed gas vortices
Solution Approach 1:
The sound reflection chamber is segmented into multiple sections with progressively changing dimensions. The chamber includes a first section with a first cross-sectional area and a second section with a second cross-sectional area, creating a stepped configuration that manages gas flow while maintaining sound suppression effectiveness.
Solution Approach 2:
Different sections of the sound reflection chamber have different geometric properties tailored to specific functions. The first section is positioned to handle initial gas expansion, while the second section is positioned to manage subsequent gas flow, with each section optimized for its local role in both sound suppression and spin preservation.
2Object-affected harmful factors
If conventional radial vanes are used for sound reflection, then noise is reduced, but gas vortices interfere with rifling-induced spin
Solution Approach 1:
Instead of using conventional radial vanes that create vortices interfering with bullet spin, the invention inverts the approach by using axial vanes that align with the bullet's direction of travel. The vanes are positioned to reflect sound waves while minimizing disruption to the rifling-induced spin, effectively reversing the conventional design philosophy.
Solution Approach 2:
The invention converts the potentially harmful compressed gas expansion into a beneficial force by shaping the sound reflection chamber to guide gas flow in a manner that reinforces rather than disrupts bullet spin. The chamber geometry transforms the chaotic gas vortex into a controlled flow pattern that maintains spin stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances ballistic performance by reinforcing the bullet's spin while simultaneously achieving sound suppression, addressing the limitations of conventional silencers that degrade bullet spin and performance.
Implementation Method 1
The sonic shock wave produced when the gun fires is directed and redirected within the reflection chambers, ultimately diminishing the intensity of the shock wave emitting from the gun's muzzle
Data Source
Figure 1~2
Figure 3~3A
Figure 4
AI summary
A gun barrel for guiding a bullet along a longitudinal axis, the bullet having a diameter, the gun barrel having a circumferential series of lands, each land among the circumferential series of lands being radially displaced from the longitudinal axis a distance at least as great as one-half of the bullet's diameter, each land extending helically about the longitudinal axis; a plurality of sound reflection chambers, each sound reflection chambers among the plurality of sound reflection chambers being positioned between an adjacent pair of lands among the circumferential series of lands, each sound reflection chamber having a muzzle end, and each sound reflection chamber opening radially inwardly; and a plurality of sound reflection walls, each wall among the plurality of sound reflection walls closing one of the sound reflection chambers' muzzle ends.