Castellated Turbomachine Flanges for Faster Assembly and Clocking
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Solution Overview
Problem
Current turbomachine component coupling methods require significant time for installing fastener hardware and limit thrust reverser clocking due to the large number of interface flanges, which is inefficient and restrictive for certain turbofan engine configurations.
Innovation Solution
The use of castellation flanges with internal and external attachment flanges, where each flange section extends radially and is disposed perpendicular to the axis of symmetry, forming mating pairs with receptacle sections that allow for anti-rotation features and asymmetric spacing, facilitating efficient coupling and assembly without the need for extensive fastener installation and enabling flexible clocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional interface flanges with multiple bolts and nuts are used to couple turbomachine components, then the connection is secure and reliable, but the assembly time becomes excessively long and the clocking flexibility is limited
Solution Approach 1:
The patent combines multiple fastening functions into a single integrated castellated flange structure. The interlocking teeth of the castellated flange replace the need for multiple individual bolts and nuts, merging the functions of alignment, positioning, and securing into one component that achieves the same reliable connection with significantly fewer fasteners.
Solution Approach 2:
The flange is segmented into multiple interlocking teeth or castellations rather than using a solid continuous flange design. This segmentation allows the flange to engage with corresponding teeth on the mating component, creating multiple contact points that distribute loads and provide secure connection while reducing the number of separate fastening elements needed.
2Adaptability or versatility
If 36 interface flanges are used around the component mating end, then the connection is secure, but the thrust reverser clocking is limited to 10-degree increments
Solution Approach 1:
The castellated flange design incorporates asymmetric tooth configurations and varying spacing between teeth, allowing for continuous or finer angular adjustments rather than being constrained to fixed 10-degree increments. This asymmetric arrangement enables the thrust reverser to be clocked to precise angular positions while maintaining secure mechanical engagement.
Data Source
AI summary
Turbomachines and methods for coupling first and second turbomachine components are provided. The components include castellated flange arrangements that provide an improved retention method for retaining the components that is far superior in than bolts and nuts, especially for massive unbalance loading.