Turbo Machine Sealing Assembly for Vane Carrier Gap Leakage
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Solution Overview
Problem
In turbo machines, the leakage of fluid through gaps between vane carriers in the axial direction of the turbine casing reduces conversion efficiency, necessitating a reliable sealing mechanism to minimize fluid leakage and maintain efficient operation.
Innovation Solution
A sealing assembly is introduced, comprising a sealing body and a pressing member that extends and compresses in the circumferential direction, allowing the sealing body to be pressed toward the first vane carrier, thereby maintaining contact and sealing the gap between vane carriers, even during thermal expansion and operational changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a sealing assembly is introduced to seal the gap between vane carriers, then fluid leakage is reduced and conversion efficiency is improved, but device complexity increases due to additional sealing components
Solution Approach 1:
The sealing body is inserted into a sealing groove formed in the second vane carrier, creating a nested structure where the sealing assembly is integrated within the existing vane carrier geometry rather than adding external components. This reduces overall device complexity while maintaining sealing functionality
Solution Approach 2:
The pressing member acts as an intermediary element between the sealing body and the vane carriers, providing the necessary contact force to maintain sealing without requiring complex fastening mechanisms. The pressing member translates thermal expansion and operational movements into effective sealing pressure
2Reliability
If the sealing body is pressed firmly against the vane carriers to ensure hermetic sealing, then sealing reliability is improved, but the sealing assembly becomes less adaptable to thermal expansion and operational changes
Solution Approach 1:
The pressing member is designed with elastic properties allowing it to dynamically adjust its compression force on the sealing body in response to thermal expansion and operational changes. This dynamic adaptation maintains reliable sealing without requiring overly rigid constraints that would reduce adaptability
Solution Approach 2:
The sealing assembly utilizes changes in the pressing member's elastic parameters (compression force) in response to thermal and operational conditions. As temperature and operational states change, the pressing member's elastic deformation adjusts the sealing pressure to maintain hermetic sealing across varying conditions
3Stability of the object's composition
If the pressing member is made rigid to maintain consistent sealing pressure, then sealing stability is improved, but the sealing assembly cannot accommodate thermal expansion and operational changes
Solution Approach 1:
The pressing member is constructed from elastic material rather than rigid structure, allowing it to flex and deform in response to thermal expansion and operational changes while maintaining consistent sealing pressure. This flexibility enables the assembly to adapt to dimensional changes in the vane carriers without compromising sealing stability
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 sealing assembly ensures consistent hermetic sealing of the gap between vane carriers, maintaining sealing performance while accommodating thermal expansion and operational changes, thus enhancing the efficiency of fluid flow and reducing leakage.
Implementation Method 1
configured to extend and compress in a circumferential direction of the first component
Data Source
AI summary
A sealing assembly for sealing a gap between a first component and a second component is provided. The sealing assembly includes a sealing body disposed between the first component and the second component and a pressing member disposed between the sealing body and the second component, configured to press the sealing body toward the first component, and configured to extend and compress in a circumferential direction of the first component.