Deformable Flange Engine Inlet Cover for Moisture Protection
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Solution Overview
Problem
Current aircraft engine inlet covers fail to effectively protect the leading edge of the cowl structure and inlet from damage and moisture ingress, leading to inconsistencies and increased maintenance costs due to their material properties and inability to form a secure fit.
Innovation Solution
A cover system comprising a deformable flange and retaining feature that forms an interference fit with the engine housing, using materials like foam and elastomers to absorb impact and reduce moisture entry, while a sealing system minimizes environmental exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If hard materials like plastic or fiberglass are used for the inlet cover, then the cover provides structural coverage for the opening, but the leading edge of the housing develops inconsistencies and damage from maintenance equipment contact
Solution Approach 1:
The patent applies a soft, deformable material (such as foam or elastomer) to the leading edge of the inlet cover that protrudes beyond the housing opening. This soft material acts as a cushioning layer that absorbs impact from maintenance equipment and debris before it can reach the hard housing surface, thereby preventing damage and inconsistencies while maintaining structural coverage.
Solution Approach 2:
The inlet cover is constructed as a composite structure combining hard materials (plastic or fiberglass) for the main body with soft deformable material (foam or elastomer) for the leading edge. This composite design allows the hard material to provide structural integrity and coverage while the soft material protects the housing from impact damage, resolving the contradiction between coverage and protection.
2Object-affected harmful factors
If a cover is installed to protect the inlet opening, then debris and moisture are blocked from entering, but the cover cannot form a secure fit and allows moisture ingress
Solution Approach 1:
The patent incorporates a deformable flange made of soft material that can flex and conform to the housing surface. This flexible flange creates a reliable seal against moisture ingress while allowing the cover to be securely fitted to the housing, resolving the contradiction between blocking moisture and forming a secure fit.
Solution Approach 2:
The patent uses materials with different physical parameters (hardness, flexibility) in different portions of the cover. The main body uses hard materials for structural integrity, while the flange and leading edge use soft deformable materials for sealing and impact absorption. This parameter variation allows the cover to simultaneously block moisture and form a secure fit.
3Object-affected harmful factors
If the inlet cover opening is left uncovered, then the housing leading edge remains exposed to damage, but covering it with hard materials causes inconsistencies at the leading edge
Solution Approach 1:
The soft deformable material on the leading edge acts as a protective cushion that prevents debris and maintenance equipment from directly impacting the housing surface. This cushioning effect maintains the smoothness and consistency of the leading edge while still providing exposure protection, resolving the contradiction between coverage and surface quality.
Solution Approach 2:
The patent applies different material properties to different locations on the cover. The main body uses hard materials for structural coverage, while the leading edge uses soft deformable material for impact protection and surface consistency. This local differentiation allows the cover to protect the housing without creating inconsistencies at the leading edge.
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 solution provides comprehensive protection for the engine inlet and leading edge, reducing maintenance costs and preventing damage from debris and moisture, thereby enhancing the durability and operational readiness of aircraft engines.
Implementation Method 1
The flange is comprised of a deformable material and extends from the structure around a circumference of the structure
Implementation Method 2
the retaining feature and the flange form a channel configured to receive an end of the housing and form an interference fit with a portion of an interior surface of the housing
Data Source
AI summary
A method for covering an end of a housing for an engine. A cover is positioned relative to the end of the housing for the engine. The cover comprises a structure, a flange comprised of a deformable material extending from the structure around a circumference of the structure, and a retaining feature configured to extend from a middle portion of the structure such that the retaining feature and the flange form a channel configured to receive the end of the housing. The cover is moved in a direction towards the end of the housing for the engine such that the retaining feature extends into an inlet of the engine through an opening of the housing to form an interference fit between the retaining feature and a portion of an interior surface of the housing.