Multi-Axis Slide Carriage Reduces Stress in Gas Turbine Nozzles
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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, particularly when mounting sliding exhaust nozzle panels.
Innovation Solution
A multi-axis slide carriage system with a C-channeled track and slider design that allows for translation and rotation of components, incorporating a liner or lubricant coating to reduce friction and a spring for additional support, enabling the system to accommodate panel movement and reduce stresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a typical slide carriage system with rolling elements in tracks is used to mount the nozzle panel, then the nozzle panel can be slidingly mounted and positioned, but high internal stresses and contact stresses occur leading to component wear and failure
Solution Approach 1:
The patent transforms the static rigid mounting system into a dynamic multi-axis system. The mounting assembly includes a slide carriage bracket that can translate along the track axis and also rotate about the track axis, allowing the system to dynamically adapt to panel warping and stress changes, thereby reducing internal stresses and improving component reliability
Solution Approach 2:
The mounting assembly is segmented into multiple independent degrees of freedom: translation along the track axis and rotation about the track axis. This segmentation allows each degree of freedom to independently accommodate different types of stress and movement, reducing the overall stress on individual components
2Adaptability or versatility
If a rigid mounting system is used to securely attach the nozzle panel, then the panel is firmly mounted, but the system cannot accommodate panel warping from changing bending moments
Solution Approach 1:
The mounting assembly incorporates dynamic movement capabilities with two degrees of freedom: translation along the track axis and rotation about the track axis. This allows the rigid mounting structure to adapt to panel warping and bending moment changes while maintaining secure attachment, effectively resolving the contradiction between rigidity and adaptability
Solution Approach 2:
The patent adds rotational freedom about the track axis as an additional dimensional degree of freedom beyond the typical linear translation. This extra dimension allows the mounting assembly to accommodate panel warping and bending in ways that a simple linear slide cannot, maintaining strength while gaining adaptability
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 minimizes internal and contact stresses by allowing components to move and rotate, thereby reducing wear and failure rates of slide carriage components.
Implementation Method 1
incorporating a liner or lubricant coating to reduce friction
Data Source
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AI summary
A multi axis slide carriage system (10) includes a channeled track (16), a slider (18), a shaft (20) and a slide carriage bracket (22). The channeled track (16) extends along a first axis (38). The slider (18) slides along the first axis (38) within the channeled track (16), and includes a slider segment aperture (62) extending therein along a second axis (52). The shaft (20) includes a slider segment (70) connected to a carriage bracket segment (74). The slider segment (70) slides along the second axis (52) within the slider segment aperture (62). The slide carriage bracket (22) is positioned adjacent to the channeled track (16), and is connected to the carriage bracket segment (74).