Vibration Damping in Structural Guide Vanes
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Solution Overview
Problem
Structural guide vanes in aircraft engines face a trade-off between accommodating vibratory loads and weight, where increasing robustness to handle larger loads results in increased weight, and existing designs lack effective vibration damping solutions.
Innovation Solution
The implementation of a stationary guide vane design featuring a vane body with cavities filled with vibration damping materials, such as stainless steel balls, which are strategically placed and bonded within the vane body to provide optimal damping while maintaining structural integrity and airflow characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the size of SGVs is increased to accommodate larger vibratory loads, then robustness is improved, but weight increases
Solution Approach 1:
The patent changes the physical state and properties of the damping material by controlling porosity (30-70%), density (0.5-2.0 g/cm³), and elastic modulus (0.1-1.0 GPa) to achieve optimal vibration damping performance without increasing structural size or weight
Solution Approach 2:
The patent uses composite damping materials comprising a matrix material (metal, polymer, or ceramic) combined with damping agents (particles, fibers, or foams) to achieve superior vibration damping properties while maintaining light weight and structural integrity
2Reliability
If vibration damping materials are added to reduce vibration-induced damage, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the damping material directly into the SGV structure by forming cavities within the existing vane body and filling them with damping material, creating an integrated damping structure that reduces complexity compared to separate damping components
Solution Approach 2:
The patent employs porous damping materials with controlled porosity (30-70%) that provide effective vibration damping while maintaining structural integrity and allowing for simplified monolithic construction without complex internal frameworks
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively reduces vibration-induced damage to the guide vanes while maintaining structural integrity and compactness, allowing for increased power density and efficiency in gas turbine engines without excessive weight addition.
Implementation Method 1
cavities 66 are formed in the vane body 62. Each of the plurality of cavities 66 receives a container 70... vibration damping material is loaded into each of the plurality of containers 70
Implementation Method 2
Vibration damping is provided by material loaded into each of the plurality of containers 70
Data Source
Figure 1
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AI summary
A stationary guide vane includes a top platform, a bottom platform, and a vane body located between the top platform and the bottom platform. The vane body includes one or more cavities formed on a side wall of the vane body. One or more of the cavities are filled with vibration damping material and a vane cover is bonded to the vane body over the one or more containers.