Gas Turbine Case Vane Retention via Monolithic Projection
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Solution Overview
Problem
Gas turbine engines face damage from unwanted axial movement of stationary vanes during surge conditions, which existing technologies have not adequately addressed, particularly in preventing vane movement and ensuring component safety.
Innovation Solution
A monolithic case and projection assembly is formed, with variable area vanes having platforms and flanges that contact the projection, preventing axial movement by utilizing inclined surfaces to restrict vane movement during surge conditions, thus protecting adjacent components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate arm is attached to the engine case to prevent vane movement, then vane movement is limited, but device complexity increases
Solution Approach 1:
The retention feature is integrated directly into the engine case as a monolithic structure, eliminating the need for separate arms or attachments. The case and retention feature form a single unified component that prevents vane movement without requiring additional assembly steps or parts.
2Reliability
If multiple separate components are used for vane retention, then vane movement is restricted, but manufacturing complexity increases
Solution Approach 1:
The engine case and retention feature are formed as a single monolithic component through integral forming processes, reducing manufacturing steps and eliminating the need to assemble multiple retention parts. This integration maintains effective vane retention while significantly simplifying the manufacturing process.
Data Source
Figure 1
Figure 2~3
AI summary
One exemplary aspect of this disclosure relates to an assembly for a gas turbine engine (20) having an engine axis (A). The assembly includes a case (80) including an integrally formed projection (84) configured to extend transverse to the engine axis (A). The assembly further includes an engine component including a flange (86) configured for contact with the projection (84) to limit motion of the component along the engine axis (A).