Gas Turbine Fairing Locating Wedge for Strut Alignment
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Solution Overview
Problem
Gas turbine engine fairing assemblies face challenges in maintaining precise spacing and orientation of struts and fairing sheaths, which can lead to structural instability and vibration issues, particularly due to the lack of effective locating components that protect downstream components and manage spacing effectively.
Innovation Solution
The use of wedge-shaped locating components positioned between fairing sheaths and struts to establish desired axial spacing and orientation, creating a crumple zone for protection and guiding the fairing sheath, with optional adherence and material selection for durability and heat resistance, and varying sizes and shapes to tune vibratory modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If locating components are not used, then the device complexity is reduced, but the manufacturing precision and structural stability deteriorate due to inability to maintain precise spacing and orientation of struts and fairing sheaths
Solution Approach 1:
A locating component is introduced as an intermediary element between the fairing sheath and the strut. This component features a leading edge that contacts the strut and an aft portion that contacts the fairing sheath, thereby mediating the spatial relationship between these two elements and establishing precise axial spacing and orientation without requiring complex direct coupling mechanisms
Solution Approach 2:
The locating component is designed to automatically establish the correct spacing and orientation through its geometric features (leading edge, sides, and aft portion) that self-align with the strut and fairing sheath. The component's own structure serves as the locating mechanism, eliminating the need for additional external locating devices or complex adjustment mechanisms
2Stability of the object's composition
If locating components are added, then the structural stability and vibration management improve, but the device complexity increases
Solution Approach 1:
The locating component acts as a mediator that improves structural stability by ensuring precise and stable spacing between the fairing sheath and strut. It provides a reliable mechanical interface that maintains consistent orientation and positioning, thereby enhancing the overall structural stability without requiring multiple separate stabilization mechanisms
Solution Approach 2:
The locating component's geometric design enables it to self-establish stable positioning through its leading edge contact with the strut and aft portion contact with the fairing sheath. This self-locating capability provides inherent structural stability and vibration management without requiring additional active control systems or complex passive stabilization devices
3Reliability
If locating components are added, then the protection of downstream components and vibration management improve, but the device complexity increases
Solution Approach 1:
The locating component is positioned upstream to establish precise spacing and orientation before downstream components are affected by potential vibrations or misalignments. Its leading edge contacts the strut in advance to prevent excessive movements that could damage downstream components, providing a form of preventive protection
Solution Approach 2:
The locating component serves as an intermediary that protects downstream components by maintaining proper spacing and orientation between the fairing sheath and strut. It absorbs or mitigates vibratory effects at its location, preventing these vibrations from propagating to downstream components, thereby enhancing reliability without requiring separate protection devices for each component
Data Source
Figure 1~2
Figure 3~4
AI summary
Gas turbine engine systems involving fairings with locating data are provided. In this regard, a representative a fairing assembly for a gas turbine engine includes: a first locating component having a leading edge, first and second sides extending from the leading edge, and a recess oriented parallel to the leading edge, the recess having a first datum surface, the first locating component being operative to be positioned between a portion of a strut and a portion of an interior surface of a fairing sheath such that the first datum surface establishes a desired orientation of the fairing sheath relative to the strut.