Multi-Axis Slide Carriage for Exhaust Nozzle Stress Relief
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Solution Overview
Problem
Slide carriage systems in gas turbine engines face high internal and contact stresses due to changing bending moments, leading to component wear and failure, especially when mounting sliding exhaust nozzle panels.
Innovation Solution
A multi-axis slide carriage system with a channeled track, slider, shaft, and slide carriage bracket, allowing components to translate and rotate, reducing stresses through a C-channeled track design with a slider segment aperture and a shaft connected to a carriage bracket segment, and optional liners or coatings for reduced friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional slide carriage system with rolling elements is used to mount the exhaust nozzle panel, then the panel can be supported and positioned, but high internal stresses and contact stresses occur due to changing bending moments during engine operation, leading to increased component wear and failure
Solution Approach 1:
The patent transitions from a single-axis rolling element system to a multi-axis slide carriage system. The slide carriage bracket includes a slider that moves along the first axis within a channeled track, and a shaft that rotates along a second axis perpendicular to the first axis. This two-dimensional movement capability allows the system to accommodate changing bending moments and panel warping in multiple directions, significantly reducing internal stresses and contact stresses on individual components while maintaining reliable panel support
Solution Approach 2:
The system employs dynamic movement capabilities where the slider can translate along the first axis and the shaft can rotate along the second axis. This dynamic adjustment allows the slide carriage bracket to adapt to varying panel positions and orientations during engine operation, distributing stresses more effectively across the system and reducing wear on individual components compared to a fixed single-axis system
2Adaptability or versatility
If a traditional single-axis slide carriage system is used, then the structure is simple, but it cannot accommodate panel warping and pressure differentials effectively, leading to high contact stresses and component failure
Solution Approach 1:
The patent adds a second axis of movement to the traditional single-axis slide carriage system. The slider moves along the first axis within the channeled track, while the shaft provides rotation along the second axis perpendicular to the first axis. This multi-axis capability enables the system to accommodate panel warping, pressure differentials, and thermal expansion in multiple directions, significantly improving adaptability while maintaining a relatively compact and integrated structure
Solution Approach 2:
The system employs a nested configuration where the slider is positioned within the channeled track, and the shaft is positioned within the slider. This nested arrangement allows multiple degrees of freedom (linear movement of slider, rotation of shaft) to be compactly integrated without requiring separate mounting structures, achieving high adaptability while controlling device complexity
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
The system effectively reduces internal and contact stresses, minimizing wear and failure by accommodating panel movement and pressure differentials, enhancing the durability and reliability of the slide carriage system.
Implementation Method 1
featuring a C-channeled track with a liner or lubricant coating to reduce friction and wear
Data Source
AI summary
A multi axis slide carriage system includes a channeled track, a slide, a shaft and a slide carriage bracket. The channeled track extends along a first axis. The slider slides along the first axis within the channeled track, and includes a slider segment aperture extending therein along a second axis. The shaft includes a slider segment connected to a carriage bracket segment. The slider segment slides along the second axis within the slider segment aperture. The slide carriage bracket is positioned adjacent to the channeled track, and is connected to the carriage bracket segment.