Rotor Blade Erosion Shield Application Jig Design
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Solution Overview
Problem
The existing jig configuration for applying erosion shields to rotor blades interferes with the heating process, requiring cumbersome workarounds to avoid obstruction and lacks efficiency in pressing the rotor blade member, especially when dealing with curved surfaces and varying blade widths.
Innovation Solution
An application jig with a body section, first pressing section for the leading edge, second pressing section for the trailing edge, and a pivotable third pressing section that bypasses the trailing edge from the back side to the belly side, allowing for balanced pressing and improved workability by minimizing obstruction during heating, and accommodating different blade widths through adjustable components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the leading edge of the rotor blade member is pressed from the belly side using a jig, then the erosion shield member can be positioned accurately, but the heating instrument cannot be disposed properly and workability deteriorates
Solution Approach 1:
The pressing function is divided into two separate pressing sections: one pressing from the back side and another pressing from the belly side. This segmentation allows the heating instrument to access the leading edge from the belly side without obstruction, while both pressing sections work together to achieve accurate positioning of the erosion shield member.
Solution Approach 2:
The pressing approach is changed from a single-sided pressing (only from back side) to multi-directional pressing (from both back side and belly side). This dimensional change in pressing direction enables simultaneous achievement of accurate positioning and unobstructed heating access.
2Force
If a rigid pressing structure is used to press the rotor blade member, then pressing force is sufficient, but the curved surface of the rotor blade member cannot be pressed reliably
Solution Approach 1:
The pressing section includes a pressing member with a curved pressing surface that matches the curvature of the rotor blade member's leading edge. This curved geometry allows the pressing force to be distributed evenly across the curved surface, ensuring reliable contact and accurate positioning while maintaining sufficient pressing force.
3Ease of operation
If the jig configuration is simplified to improve ease of operation, then workability improves, but the ability to handle varying blade widths and curved surfaces deteriorates
Solution Approach 1:
The pressing section includes movable pressing members that can adjust their position and orientation. This dynamic capability allows the jig to adapt to different blade widths and curved surface geometries while maintaining ease of operation through simple mechanical adjustments rather than complex reconfigurations.
Solution Approach 2:
The pressing section is designed with universal features including adjustable pressing members and curved pressing surfaces that can accommodate various blade geometries. This multi-functional design allows a single jig configuration to handle different blade widths and curved surfaces effectively.
Data Source
AI summary
An application jig is used when an erosion shield member is applied to a rotor blade member. The application jig includes a body section disposed on a back side of the rotor blade member; a first pressing section provided in the body section and pressing an erosion shield member to be placed at a leading edge of the rotor blade member from the back side; a second pressing section supported by the body section and pressing a trailing edge of the rotor blade member from the back side; and a third pressing section supported by the body section. The third pressing section is disposed to bypass the trailing edge from the back side to a belly side thereof, is pivotable around a pivot shaft provided in the body section, and presses a portion between the leading and trailing edges in a pivoting direction from the belly side.