Aircraft Oxygen Core Stabilization Against Vibration
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Solution Overview
Problem
Chemical oxygen generators in aircrafts face variability in oxygen production due to external environmental factors like temperature and vibrations, leading to inconsistent oxygen supply and duration, which can be insufficient in emergency situations.
Innovation Solution
A chemical oxygen core with a composition of metal powder fuel, a minimized amount of transition metal oxide catalyst, and an oxygen source, surrounded by a perforated metal covering that reduces heat transfer and provides structural stability, ensuring consistent oxygen production across varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a chemical oxygen core is used in aircraft emergency oxygen systems, then oxygen can be generated on-demand, but the oxygen production speed and duration vary significantly with temperature and vibration conditions
Solution Approach 1:
The patent modifies the chemical composition parameters of the oxygen-generating mixture, specifically using a perchlorate-based oxygen source combined with a metal fuel and catalyst system. This compositional change makes the reaction less sensitive to temperature and vibration variations, ensuring more consistent oxygen production across different environmental conditions.
Solution Approach 2:
The invention uses a composite chemical mixture comprising multiple components: perchlorate salt, metal fuel powder, and catalyst. This composite formulation creates a more stable and predictable reaction that maintains consistent oxygen generation rates despite external environmental factors like temperature changes and vibrations during flight.
2Productivity
If the chemical oxygen core produces oxygen at high speed, then the oxygen supply duration is shortened, but if it produces oxygen slowly, then the oxygen flow becomes insufficient
Solution Approach 1:
The patent optimizes the reaction parameters by adjusting the perchlorate-to-fuel ratio and catalyst concentration. This creates a balanced reaction rate that maintains sufficient oxygen flow while extending the duration of oxygen generation to meet emergency oxygen system requirements.
Solution Approach 2:
The invention creates a standardized chemical composition formula that can be replicated across different oxygen generator units. This consistent formulation ensures that each generator produces oxygen at the same controlled rate and duration, providing reliable and predictable performance across the entire oxygen distribution system.
3Productivity
If the chemical oxygen core is subjected to vibrations during flight, then the oxygen flow is reduced, but if it is protected from vibrations, then the system complexity increases
Solution Approach 1:
The patent modifies the physical and chemical parameters of the oxygen-generating composition, including particle size distribution and catalyst type, to create a formulation that is inherently resistant to vibration effects. This eliminates the need for additional vibration protection mechanisms while maintaining stable oxygen flow.
Solution Approach 2:
The chemical composition itself provides resistance to vibration effects through its inherent properties. The optimized perchlorate-fuel-catalyst mixture maintains stable reaction kinetics under vibrational stress, making the system self-protecting against vibration-induced performance degradation without requiring external protective structures.
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 solution minimizes the sensitivity of oxygen production to temperature fluctuations and provides a stable oxygen supply and duration, ensuring sufficient breathable oxygen is produced regardless of environmental conditions.
Implementation Method 1
the chemical oxygen core is configured to produce breathable oxygen gas upon thermal decomposition of the chemical oxygen core
Implementation Method 2
the at least one layer includes a metal powder fuel, a transition metal oxide catalyst, and an oxygen source
Data Source
AI summary
A chemical oxygen core for a chemical oxygen generator includes at least one layer of an oxygen-generating composition. In some examples, the at least one layer comprises includes a metal powder fuel, a transition metal oxide catalyst, and an oxygen source. In various examples, the at least one layer includes less than approximately 0.1 percent by weight of the transition metal oxide catalyst. In certain examples, a chemical oxygen generator includes a chemical oxygen core and a perforated metal covering surrounding the chemical oxygen core along a length of the chemical oxygen core. In some aspects, the perforated metal covering has an opening ratio of approximately 0 to 100 percent.