Firearm Silencer Gas Flow Segmentation and Cooling
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Solution Overview
Problem
Existing firearm silencers face issues with overpressure and temperature buildup, leading to material degradation, increased recoil, and malfunctions due to high rates of fire, particularly in automatic weapons, and current solutions are complex and not effectively simple to manufacture.
Innovation Solution
A noise reduction device that separates gases into a main flow and secondary flows, using a distribution and slowing system with metallic components and air intake vents to slow down secondary flows, which reduces noise and recoil, and incorporates a bimetallic strip for temperature-controlled vent opening to manage overpressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a silencer is used to reduce noise and recoil, then sound reduction is improved, but overpressure and temperature buildup occur due to high rates of fire
Solution Approach 1:
The silencer divides the gas flow into two separate paths: a central channel for the main gas flow and peripheral channels for secondary gas flows. This segmentation allows heat and pressure to be distributed across multiple pathways, reducing temperature buildup and overpressure in any single region while maintaining noise reduction effectiveness.
Solution Approach 2:
The patent introduces an intermediary cooling mechanism where external air is drawn through cooling channels that surround the central gas flow path. This external air acts as a heat sink, absorbing excess heat from the propellant gases before they exit the silencer, thereby reducing temperature buildup without compromising the noise reduction function.
2Object-generated harmful factors
If a silencer is used to reduce noise and recoil, then sound reduction is improved, but material degradation occurs due to high temperature and pressure
Solution Approach 1:
The silencer structure is segmented into multiple independent flow channels with separate wall structures. This segmentation distributes the thermal and pressure loads across multiple surfaces, preventing concentration of stress and heat in any single location, thereby reducing material degradation and extending service life.
Solution Approach 2:
The cooling channels act as an intermediary protective layer between the hot propellant gases and the silencer's structural materials. By introducing cooler external air through these channels, the temperature exposure of the structural materials is significantly reduced, preventing thermal degradation and maintaining material strength.
3Object-generated harmful factors
If a silencer is used to reduce noise and recoil, then sound reduction is improved, but device complexity increases with multiple parts and connecting rings
Solution Approach 1:
The patent merges the noise reduction function with the cooling function into a single integrated structure. The same peripheral channels that reduce noise by diverting gas flows also serve as cooling passages for heat dissipation. This combination eliminates the need for separate cooling components and reducing overall device complexity.
Solution Approach 2:
The silencer design implements multi-functionality where the gas distribution system simultaneously performs noise reduction and heat management functions. The peripheral flow channels serve dual purposes: diverting propellant gases to reduce muzzle blast noise and providing pathways for cooling air circulation. This multi-functionality reduces the number of separate components needed.
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 device significantly reduces noise and recoil, is simpler to manufacture, and effectively manages overpressure and temperature, enhancing the primary function of sound reduction and blast elimination.
Implementation Method 1
whose opening is controlled when a temperature threshold value is reached
Implementation Method 2
provide a significant drop in overpressures
Implementation Method 3
the gases coming from the weapon enter the combustion chamber and separate into several flows, a main flow propagating in the central part and at least one flow secondary entering an annular cylindrical casing
Implementation Method 4
the secondary flow(s) being further slowed down in their progression from upstream to downstream
Implementation Method 5
slowing down elements arranged around the part central
Implementation Method 6
generate according to the invention a significant reduction in noise and blast when firing and exiting the projectile
Implementation Method 7
very greatly reduces, or even eliminates the blast effect
Implementation Method 8
contributes greatly to reducing the recoil of the weapon
Data Source
Figure 1~4
Figure 5~8
AI summary
A noise reduction device comprising a gas expansion chamber (11) and a cylindrical central portion (2) communicating upstream with the expansion chamber and opening downstream to the outside, characterized in that it includes means for distributing and slowing down the gas flow from the expansion chamber (11), said means being arranged around the central portion (2) by communicating with the expansion chamber (11) and opening to the outside, and being intended to divert a portion of the gases from the combustion chamber to generate a main flow circulating in the central portion and at least one secondary flow circulating in a separate volume formed around the central portion. The device provides a significant reduction in noise and a decrease in weapon recoil.