Variable-Thickness Cabin Seal for Dynamic Aircraft Gaps
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Solution Overview
Problem
Aircraft cabin structures experience gaps due to dynamic movement during flight and manufacturing tolerances, leading to issues with sound, light, and vibration transmission, as well as aesthetic and structural integrity concerns.
Innovation Solution
A tubular seal with a variable thickness profile and a reinforcing insert is used to fill gaps between adjacent aircraft cabin structures, providing a resilient and flexible seal that can compress and expand to maintain a secure fit, reducing the need for multiple seal parts and enhancing structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple seal parts are used to fill gaps between aircraft cabin structures, then the sealing effectiveness is improved, but the device complexity and installation difficulty increase
Solution Approach 1:
The patent combines multiple seal parts into a single tubular seal component with variable wall thickness. The thick wall regions and thin wall regions are integrated into one continuous tubular structure that can simultaneously handle different gap conditions along its length, eliminating the need for multiple separate seal parts and simplifying installation while maintaining sealing effectiveness.
Solution Approach 2:
The tubular seal with variable wall thickness serves multiple functions: the thick wall regions provide structural support and sealing for larger gaps, while the thin wall regions accommodate smaller gaps and allow for compression. This multi-functional design enables a single component to replace multiple specialized seal parts.
2Strength
If rigid seal structures are used to maintain gap closure, then structural integrity is improved, but the ability to accommodate dynamic movement and manufacturing tolerances deteriorates
Solution Approach 1:
The tubular seal incorporates dynamic characteristics through its variable wall thickness design. The thin wall regions are more compliant and can deform to accommodate dynamic movement between cabin structures, while the thick wall regions maintain structural integrity. This creates a dynamically adaptive seal that responds to changing gap conditions during flight.
Solution Approach 2:
Different regions of the tubular seal have different wall thicknesses tailored to local requirements. The thick wall regions provide enhanced strength and rigidity where structural support is needed, while the thin wall regions provide flexibility and compliance where movement accommodation is prioritized. This local differentiation resolves the contradiction between strength and adaptability.
3Ease of manufacture
If uniform wall thickness is used in the tubular seal, then manufacturing simplicity is improved, but the ability to optimize sealing performance for varying gap conditions deteriorates
Solution Approach 1:
The tubular seal features variable wall thickness with thick and thin wall regions distributed along its length. This local quality variation allows the seal to optimize performance for different gap conditions - thick walls for structural support and large gaps, thin walls for flexibility and small gaps - while still being manufacturable as a single extruded component.
4Adaptability or versatility
If the tubular seal has variable wall thickness, then adaptability to different gap dimensions is improved, but manufacturing complexity increases
Solution Approach 1:
The tubular seal utilizes parameter changes in wall thickness to achieve adaptability. By varying the wall thickness parameter along the length of the tube, the seal can accommodate different gap dimensions without requiring multiple different seal components. The alternating pattern of thick and thin wall regions provides a systematic approach to managing this complexity.
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 tubular seal effectively seals gaps between aircraft cabin structures, reducing noise and light transmission, improving structural stability, and simplifying installation by using a single, reusable part that adapts to changing gap dimensions, thereby enhancing the overall aircraft cabin assembly process.
Implementation Method 1
providing a resilient and flexible seal that can compress and expand to maintain a secure fit
Data Source
AI summary
Resilient elongated tubular seals that are flexible and that comprise selected geometric cross-sections and that can absorb compressive forces to seal gaps between adjacently positioned aircraft cabin structure and that can further expand outwardly as compressive forces change or abate and methods of installation of such tubular seals are disclosed.