Wear-Resistant Shield Guide Section for Gas Turbine Blade Root
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wear-resistant shields for rotating blade roots in gas turbines often slip during installation, leading to unwanted overhangs and potential damage, necessitating the replacement of entire rotating blade rings.
Innovation Solution
The wear-resistant shield design features side walls with arced guide sections that project beyond the base, facilitating smooth insertion and preventing slippage, with a form-fitting connection to the rotating blade root, ensuring proper alignment and minimizing the risk of damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wear-resistant shield is installed between the rotating blade root and the rotating blade root mount, then wear protection is improved, but installation slippage occurs causing overhang and potential damage
Solution Approach 1:
The guide section is designed with a curved geometry that matches the curvature of the rotating blade root. This curved guide section engages with the blade root during insertion, preventing lateral slippage and ensuring proper alignment of the wear-resistant shield between the blade root and mount.
Solution Approach 2:
The guide section acts as an intermediary element between the wear-resistant shield and the rotating blade root. It facilitates controlled insertion by providing a guiding surface that directs the shield into its final position, preventing uncontrolled slippage while maintaining wear protection functionality.
2Reliability
If the wear-resistant shield is designed to fit between the blade root and mount, then wear protection is achieved, but slippage during insertion causes damage and requires replacement of entire blade rings
Solution Approach 1:
The curved guide section matches the blade root curvature, ensuring smooth insertion without slippage. This prevents damage to both the shield and blade root, eliminating the need for costly replacement of entire rotating blade rings and improving maintenance productivity.
Solution Approach 2:
The guide section is pre-formed with the appropriate curvature to match the blade root. This preliminary design feature ensures that during insertion, the shield automatically aligns with the blade root without requiring manual adjustment or causing slippage, preventing damage before it occurs.
3Shape
If the side walls are shaped complementary to the blade root contour, then proper fit is achieved, but insertion slippage causes overhang beyond the rotor disk
Solution Approach 1:
The guide section's curved surface matches the blade root contour, providing a precise guiding path during insertion. This ensures that the wear-resistant shield is positioned with high precision, preventing overhang beyond the rotor disk while maintaining the complementary fit between side walls and blade root.
Solution Approach 2:
The guide section serves as an intermediary guiding surface that mediates between the complementary-shaped side walls and the blade root during insertion. It ensures precise alignment is achieved during the insertion process, preventing overhang while maintaining the designed complementary fit.
Data Source
AI summary
The invention relates to a wear-resistant shield for a rotating blade root of a rotating blade of a gas turbine, especially an aircraft gas turbine, having a base and two side walls connected to the base, wherein the side walls lie opposite each other and are shaped so as to be substantially complementary to an outer contour of a particular rotating blade root, and wherein the wear-resistant shield for this purpose is set up in such a way that, in an installed state, it is to be taken up between the respective rotating blade root and a rotating blade root mount of a rotor, especially between the respective rotating blade root and an axial securing element arranged in the rotating blade root mount.