Aircraft Panel Surround with Sliding Two-Part Design
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Solution Overview
Problem
The existing surround designs for aircraft panels require multiple families of components with varying heel heights to accommodate different panel thicknesses, leading to a large number of part numbers and limiting the use of identical components across different aircraft models, which complicates manufacturing and maintains aerodynamic continuity.
Innovation Solution
A two-part surround design where one component comprises a lip supporting the closing-off device and the other component provides mechanical stabilization, with the ability to adjust the flushness by sliding relative to each other, allowing identical components to be used across different panel thicknesses and separating the functions of supporting the window and stabilizing the edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single surround component with a heel is used to attach the window assembly to the opening, then the aerodynamic continuity of the fuselage is maintained, but the height of the heel must be substantially equal to the thickness of the panel, requiring multiple families of surround components with different heel heights to accommodate different panel thicknesses
Solution Approach 1:
The surround component is divided into two separate components: a first component that attaches to the panel and a second component that supports the window assembly. This segmentation allows each component to be independently designed and optimized, eliminating the need for multiple families of surrounds with different heel heights.
Solution Approach 2:
The first component is designed with a universal attachment mechanism that can accommodate various panel thicknesses. The second component is detachably connected to the first component, allowing the same first component to serve multiple window openings across different aircraft models, thereby reducing the number of part numbers required.
2Manufacturing precision
If the height of the heel is made equal to the thickness of the panel to maintain aerodynamic continuity, then the flushness of the surround is achieved, but identical surround components cannot be used with various openings of different aircraft models
Solution Approach 1:
The connection between the first and second components is made detachable rather than permanent. This dynamic connection allows the second component to be adjusted and repositioned on different aircraft models while maintaining the required flushness with the panel surface, enabling the same first component to be reused across multiple aircraft models.
3Object-affected harmful factors
If multiple families of surround components are used to accommodate different panel thicknesses, then the aerodynamic qualities of the fuselage are maintained, but the number of different part numbers increases correspondingly with the number of aircraft models
Solution Approach 1:
By segmenting the surround into two components with a detachable connection, the system allows the first component to remain universal across different aircraft models while the second component can be adjusted to maintain aerodynamic continuity for each specific application, thereby reducing the total number of part numbers required.
4Device complexity
If a single surround component is used, then the structure is simplified, but the functions of supporting the window and stabilizing the edge cannot be separated
Solution Approach 1:
The surround is divided into two components with distinct functions: the first component provides edge stabilization by attaching to the panel, while the second component provides window support. This functional separation is achieved through segmentation while maintaining overall structural simplicity.
Solution Approach 2:
The two components are connected through a detachable connection that allows them to function separately yet work together as an integrated system, combining the benefits of functional separation with structural simplicity.
Data Source
Figure 1~2
Figure 3A~3B
AI summary
The subject of the invention is a surround (40) for an opening (42) made in a panel (44) of an aircraft, notably a fuselage panel of the aircraft. The panel comprises at least one exterior surface (46), the surround is fixed to the panel, forming an interface for fitting a closing-off device (48), and comprises at least one lip (54) extending towards the centre of the opening (42). The lip supports the closing-off device (48) and has at least one external face interposed between the external surface (46) of the panel and the closing-off device. The surround (40) is characterized in that it is made of at least two independent components joined together, a first component (62) comprising the lip (54) and a second component (64) being fixed to the panel.