Aircraft Wall Retainer Assembly for Thermal Blanket Isolation
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Solution Overview
Problem
Existing aircraft wall structures for propulsion system nacelles face challenges in securely attaching thermal blankets to bond panels, particularly in maintaining thermal integrity and reducing thermal conduction.
Innovation Solution
A wall structure for aircraft incorporating a fastener system that includes a mount and a retainer, where the retainer features a head, a receiver, and spring elements that axially bias the second wall section towards the first wall section, effectively securing and thermally isolating the thermal blanket.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If threaded stud assemblies are used to attach the thermal blanket to the bond panel, then the thermal blanket can be securely attached, but the thermal conduction increases and thermal integrity is compromised
Solution Approach 1:
The fastener system is divided into separate components: a mount attached to the bond panel, a retainer that clips onto the mount, and spring elements that provide biasing force. This segmentation allows the thermal blanket to be secured without continuous threaded fasteners that conduct heat, thereby reducing thermal conduction while maintaining attachment security.
Solution Approach 2:
The spring elements act as intermediaries between the mount and retainer, providing the necessary fastening force through elastic deformation rather than direct metal-to-metal threaded connection. This intermediary mechanism reduces thermal conduction paths while maintaining secure attachment of the thermal blanket.
2Object-affected harmful factors
If a simple clip mechanism is used to attach the thermal blanket, then thermal conduction is reduced, but the attachment security and reliability decrease
Solution Approach 1:
The spring elements introduce dynamic elasticity to the clip mechanism, allowing it to maintain consistent contact pressure and secure attachment. The spring biasing force dynamically adapts to ensure the retainer remains firmly engaged with the mount, preventing detachment while minimizing thermal conduction through the fastening system.
3Reliability
If multiple fasteners are used to secure the thermal blanket, then attachment security improves, but the device complexity increases
Solution Approach 1:
Multiple spring elements are combined within a single retainer assembly that clips onto one mount, consolidating multiple fastening functions into an integrated unit. This merging approach maintains secure attachment of the thermal blanket while reducing the overall number of discrete fastener components compared to using multiple threaded stud assemblies distributed across the bond panel.
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 proposed solution enhances the secure attachment and thermal insulation of the thermal blanket, reducing thermal conduction and maintaining structural integrity within the aircraft propulsion system nacelle.
Implementation Method 1
The spring clip may be biased radially against the post
Implementation Method 2
The spring elements axially bias the second wall section towards the first wall section
Data Source
AI summary
A wall structure is provided for an aircraft. This wall structure includes a first wall section, a second wall section and a fastener system fastening the second wall section to the first wall section. The second wall section includes an aperture extending axially along an axis through the second wall section. The second wall section is axially spaced from the first wall section. The fastener system includes a mount and a retainer. The mount is connected to the first wall section. The mount includes a post that projects axially into the aperture. The retainer includes a head and a spring clip connected to the head. The head axially engages the second wall section. The spring clip is disposed in the aperture and is mated with the post.