Turbine Combustor Liner Stop Interference Fit
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Solution Overview
Problem
Existing liner stop systems for gas turbines require labor-intensive field replacement and on-site welding due to component wear, making them cumbersome, time-consuming, and expensive.
Innovation Solution
A liner stop system comprising a female component with a recess and a male component with a protrusion, along with an insert that interferes with either component to provide retention without the need for attachment, utilizing surface protrusions for interference fit and potentially including a wear coating for durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inserts are attached to male components using welds, then the liner stop can retain the flow sleeve relative to the combustion liner, but the inserts can detach during inspection and require labor-intensive field replacement with on-site welding
Solution Approach 1:
The insert is extracted as a separate, detachable component from the male component. Instead of being permanently attached via welds, the insert can be easily removed and replaced in the field without requiring welding equipment or labor-intensive procedures. This maintains the retention function while enabling simple field repair.
Solution Approach 2:
The liner stop is segmented into distinct components: the male component, the female component, and the insert. This segmentation allows the insert to be independently replaced without affecting the main structure, enabling simple field maintenance while preserving the flow sleeve retention capability.
2Strength
If inserts are welded to male components, then the liner stop provides structural integrity for retaining the flow sleeve, but the welding process is time-consuming and expensive in the field
Solution Approach 1:
The insert is designed as a separate component that can be removed without welding. This extraction eliminates the time-consuming welding process entirely, allowing for rapid field replacement while maintaining sufficient structural integrity through the interference fit and retention mechanism.
Solution Approach 2:
The insert is designed as a replaceable, lower-cost component compared to the main male and female components. When wear occurs, the insert can be quickly replaced without requiring expensive welding operations, reducing both time and cost for field maintenance.
3Reliability
If the insert is attached to the male component, then the liner stop maintains retention function, but the insert must be replaced when worn, requiring on-site welding
Solution Approach 1:
The insert is extracted as a separate replaceable component. When wear occurs, the insert can be easily removed and replaced in the field without requiring on-site welding or complex manufacturing processes. This maintains the retention function while dramatically improving field replacement ease.
Solution Approach 2:
The liner stop is divided into separable components including the insert. This segmentation enables the insert to be independently replaced without affecting the main retention structure, making field maintenance simple and eliminating the need for complex on-site welding procedures.
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 solution allows for easy and efficient retention of flow sleeves relative to combustion liners, reducing replacement costs and time by eliminating the need for attachment of components, while providing damping properties and ease of repair.
Implementation Method 1
an insert disposable between the female component and the male component, the insert comprising a surface protrusion configured to interfere with one of the female component or the male component
Data Source
AI summary
A liner stop for retaining a flow sleeve relative to a combustion liner in a combustor is disclosed. The liner stop includes a female component defining a recess and a male component comprising a protrusion, the protrusion insertable in the female component. The liner stop further includes an insert disposable between the female component and the male component, the insert comprising a surface protrusion configured to interfere with one of the female component or the male component.