Vented Rotor Assembly for Minigun Hang Fire Safety

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Solution Overview

Problem

7.62 miniguns face hazards from high-pressure gases and shrapnel during hang fires and overpressure situations, which are not effectively vented, posing a risk to the operator.

Innovation Solution

A vented rotor assembly with forward and radial pressure relief vents redirects and dissipates these gases and debris away from the operator, incorporating radial pressure relief vents positioned between barrel orifices and forward pressure relief vents at the rotor assembly's forward end.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the rotor assembly is sealed to contain high-pressure gases during normal operation, then firing reliability is improved, but operator safety deteriorates during hang fires and overpressure situations

Engineering Contradiction:

Improvefiring reliabilityVSAvoidoperator safety

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The rotor assembly is segmented with multiple pressure relief vents distributed across its surface. These vents divide the containment function into segments that can selectively release pressure in dangerous situations while maintaining overall sealing during normal operation. The segmentation allows the system to balance reliability and safety by creating multiple controlled pathways for pressure release.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pressure relief vents act as intermediary elements between the sealed rotor assembly and the external environment. During normal operation, the vents remain closed to maintain sealing. During hang fires or overpressure situations, the vents open to mediate the release of high-pressure gases and shrapnel, protecting the operator while maintaining the integrity of the sealed assembly design.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If pressure relief vents are added to the rotor assembly, then operator safety is improved, but device complexity increases

Engineering Contradiction:

Improveoperator safetyVSAvoidrotor assembly complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The pressure relief vents are merged into the rotor assembly structure itself rather than being separate components. The vents are integrated directly into the rotor body, combining the sealing function and pressure relief function into a single unified structure. This merging reduces overall device complexity by eliminating the need for separate venting mechanisms while still providing operator protection.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The rotor assembly is designed with multi-functionality, serving both as a sealing structure during normal operation and as a pressure relief structure during abnormal conditions. The same rotor assembly that contains high-pressure gases during firing also provides safety through integrated pressure relief vents, eliminating the need for separate safety devices and reducing overall system complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If multiple pressure relief vents are positioned throughout the rotor assembly, then effectiveness of shrapnel redirection is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveshrapnel redirection effectivenessVSAvoidrotor assembly manufacturing

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The rotor assembly incorporates a porous or perforated structure with multiple pressure relief vents distributed throughout its surface. This porous design allows high-pressure gases and shrapnel to be redirected through multiple pathways simultaneously, improving effectiveness. The porous structure can be manufactured using standard drilling or machining techniques, maintaining ease of manufacture while achieving superior shrapnel redirection compared to a single vent design.

Inventive Principle:

Principle #31Porous materials

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

Effectively redirects and dissipates high-pressure gases and shrapnel away from the operator, reducing the risk of injury during hang fires and overpressure situations.

Implementation Method 1

high-pressure gases and shrapnel are then forced to escape at high velocity through various openings in the housing

Methodology Applied

Scientific EffectPressure gradient: Pressure Gradient

Implementation Method 2

redirects and dissipates high-pressure gases and shrapnel forward through the rotor assembly and away from the operator

Methodology Applied

Scientific EffectGas flow:

Data Source

PatentUS7930964B1Machine gun

Publication Date: 2011.04.26 DILLON MICHAEL J

AI summary

A Gatling-type minigun eliminates the hazards to the operator of the minigun associated with hang fire and overpressure situations by providing a vented rotor assembly to redirect high-pressure gases and associated debris forward of the rotor assembly and away from the operator.