Tile Gap Seal Assembly with Redundant Bulb Seals
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Solution Overview
Problem
Existing thermal protection systems for vehicles face challenges in sealing tile gaps effectively, particularly in high-temperature environments, as they require materials that are easy to install, maintain, and replace, while also accommodating thermal expansion differences and maintaining aerodynamic continuity without adhesive or mechanical attachment.
Innovation Solution
A seal assembly comprising a gasket assembly with bulb portions, a web, and a spacer rope that forms redundant seals and an inner gap, allowing for secure locking within tile gaps without external attachment, using flexible and resilient materials to maintain thermal protection and aerodynamic continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal padding or filler bar is force-fitted into tile gaps and coated with hardening compound, then thermal sealing is improved, but ease of repair and replacement deteriorates due to complicated removal processes
Solution Approach 1:
The seal assembly is divided into distinct modular components: a flexible seal member, a retention member with engagement features, and optional reinforcement elements. This segmentation allows individual components to be replaced independently without removing the entire sealing system, resolving the contradiction between reliable thermal sealing and ease of repair.
Solution Approach 2:
The seal assembly incorporates flexible and resilient materials that can dynamically adapt to thermal expansion and contraction of the tiles. The flexible seal member can deform to maintain sealing contact while the retention member provides stable mechanical anchoring, allowing the system to maintain reliability under varying thermal conditions while remaining replaceable.
2Reliability
If adhesive bonding is used to bond insulating materials to tile side surfaces, then thermal sealing is improved, but ease of repair deteriorates due to difficulties in removing adhesive bonds
Solution Approach 1:
The invention extracts and eliminates the adhesive bonding step from the sealing system. Instead of using adhesives to bond insulating materials, the design uses mechanical retention members with engagement features that physically interlock with the tiles, providing reliable thermal sealing without adhesive bonds that would complicate repair and replacement.
Solution Approach 2:
The invention replaces the chemical bonding mechanism (adhesive) with a mechanical retention system. The retention member features mechanical engagement elements such as hooks, clips, or interlocking geometries that provide secure attachment through mechanical forces alone, enabling easy removal and replacement without adhesive removal challenges.
3Reliability
If flaps are mechanically secured by sandwiching between thermal tiles and substructure, then thermal sealing is improved, but device complexity and installation time increase
Solution Approach 1:
The seal assembly provides localized thermal sealing at the tile gap location without requiring complex global structural modifications. The retention member is designed with specific engagement features tailored to the local geometry of the tile and substructure interface, achieving reliable sealing with a simple, targeted component rather than a complex overall system.
Solution Approach 2:
The seal assembly is designed to be pre-assembled as a complete unit with the flexible seal member and retention member already configured together. This preliminary assembly allows the entire sealing system to be installed as a single module, reducing installation time and complexity compared to assembling multiple separate components during installation.
4Reliability
If insulating material is clamped beneath a bracket mounted to substructure, then thermal sealing is improved, but ease of manufacture and installation deteriorates due to time-consuming installation
Solution Approach 1:
The seal assembly is designed to be self-retaining through the retention member's engagement features that automatically secure the flexible seal member in position within the tile gap. The system is self-contained and does not require external brackets or additional mounting hardware attached to the substructure, making it easy to manufacture and install without complex external support 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 seal assembly provides improved thermal protection and aerodynamic performance by forming redundant seals and an inner gap, ensuring the substructure remains within safe temperature limits and minimizing heat transfer, while being easily removable and replaceable, thus addressing the limitations of prior art.
Implementation Method 1
The web may be formed of material that is flexible yet resiliently resistant to bending or wrapping around the spacer rope such that when the gasket assembly is in the folded configuration and the seal assembly is installed within the tile gap, the gasket assembly and spacer rope form the spring mechanism that biases or forces the second bulb portion into the groove
Implementation Method 2
The first bulb portion may be positioned proximate the tile exterior surface and may be sized and configured to maintain sealing engagement with the opposing tile side surfaces to form a first seal within the tile gap. The second bulb portion in combination with the spacer rope may be placed in sealing engagement with the tile gap to form a second seal that is redundant to the first seal for enhanced thermal protection of the substructure at the base of the tile gap.
Data Source
AI summary
A seal assembly is configured to seal a tile gap between a pair of tiles. Each of the tiles may include a tile side surface. At least one of the tiles may include a groove which may be formed along a length of the tile side surface. The seal assembly may comprise a gasket assembly including first and second bulb portions which may be interconnected by a web. A spacer rope may be positionable along the web. The gasket assembly may define a folded configuration for mounting within the tile gap when the web is wrapped around the spacer rope such that the second bulb portion is positioned between the spacer rope and the first bulb portion. The second bulb portion may be receivable within the groove.