Turbomachine Fan Duct Removable Panel Access
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Solution Overview
Problem
The mounting and maintenance of fan ducts for turbomachines, such as airplane turbojets, are complex and time-consuming, requiring extensive dismantling of the engine and duct components.
Innovation Solution
A fan duct design featuring removable panels on the internal wall attached to a framework and a rigid, single-piece support structure for the external wall, allowing easier assembly and access without dissembling the external support, and facilitating quicker maintenance through aligned openings for auxiliary components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the fan duct is designed with a solid, integrated structure for the external wall, then structural integrity and load transmission are improved, but mounting and maintenance complexity increases
Solution Approach 1:
The internal wall is divided into multiple removable panels that can be independently accessed and removed through openings in the external wall, allowing maintenance operations without dismantling the entire duct structure
Solution Approach 2:
The internal wall panels are nested within the external wall structure, with openings in the external wall providing access to the internal components, allowing the internal structure to be accessed while maintaining the external structural integrity
2Ease of repair
If the fan duct is designed with removable panels for access, then maintenance ease is improved, but structural complexity increases
Solution Approach 1:
The internal wall is segmented into removable panels that can be independently removed through openings in the external wall, enabling maintenance of internal components without removing the entire internal wall structure
Solution Approach 2:
The internal wall transitions from a fixed structure to a dynamic configuration where panels can be removed and reinstalled, allowing the structure to adapt between operational and maintenance states
3Ease of operation
If the fan duct requires extensive dismantling for maintenance, then access to internal components is improved, but loss of time increases
Solution Approach 1:
The internal wall is divided into removable panels that can be independently accessed through openings in the external wall, allowing maintenance operations to be performed without dismantling the entire duct assembly
Solution Approach 2:
The internal wall panels are pre-positioned within the external wall structure during assembly, so that during maintenance only the panels need to be removed rather than dismantling the entire structure
Data Source
AI summary
A turbomachine fan duct is disclosed. The fan duct includes two coaxial cylindrical walls, these being an internal wall and an external wall, respectively. The internal wall includes a framework to which panels are removably attached, and the external wall includes a single support structure with openings closed by removable panels. The openings in the external wall have dimensions that allow the panels of the internal wall to pass and allow these panels to be fitted onto and removed from the framework of the internal wall.