Aircraft Engine Fire Shield Composite Layering
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Solution Overview
Problem
Existing fire shields for aircraft engines are either insufficiently fireproof, overly heavy and expensive, or cumbersome to attach, posing challenges in protecting fire-sensitive components effectively.
Innovation Solution
A method for forming a fire shield involves creating a case template matching the case body, applying a release film, spraying a fire shield material onto the release film to form a layer, cutting the template, film, and layer into pieces, removing the layer from the film, and attaching it to the case body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fire shields are used, then fire protection is provided, but the shields are overly heavy and expensive
Solution Approach 1:
The fire shield combines a metallic case body with a fire shield layer made of composite fire-resistant material. This composite structure provides effective fire protection while reducing weight compared to traditional all-metal shields, as the fire shield layer can be applied to protect specific fire-sensitive areas without requiring the entire shield to be made of heavy metal.
2Reliability
If conventional fire shields are used, then fire protection is provided, but the shields are cumbersome to attach
Solution Approach 1:
The fire shield is divided into modular components: a metallic case body and separate fire shield layers that can be applied to specific sections. This segmentation allows for easier attachment and installation compared to monolithic conventional shields, as each layer can be independently positioned and secured on the case body.
Solution Approach 2:
The fire shield layer is pre-formed and can be prepared in advance, allowing for simplified attachment procedures. The layer can be pre-cut to size and pre-positioned on the case body, reducing the complexity of the attachment process during final assembly.
3Ease of manufacture
If fire shield material is sprayed directly onto the case body, then the process is simple, but the fire shield layer cannot be easily removed and repositioned
Solution Approach 1:
A release film is introduced as an intermediary between the case body and the fire shield layer. The release film allows the fire shield material to be sprayed and formed easily while enabling subsequent removal and repositioning of the layer. The film acts as a temporary barrier that can be peeled away, providing both manufacturing simplicity and design flexibility.
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
This method enables the creation of a fire shield that is both effective in protecting aircraft engine components from fires and easier to attach, addressing the limitations of existing technologies.
Implementation Method 1
spraying a fire shield material onto the release film to form the fire shield layer
Data Source
Figure 1
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Figure 3~4
AI summary
A method for forming a fire shield (44) for an aircraft engine (22) includes forming a case template (66; 80) matching a case body (54) of the fire shield (44). The case template (66; 80) has a first template side (68; 82) and a second template side (70; 84). The method further includes forming a fire shield layer (56) at the second template side (70; 84) by spraying a fire shield material (74) at the second template side (70; 84) and attaching the fire shield layer (56) to the case body (54).