Gas Turbine Guide Vane Shroud Holding Device with Air Passage Channels
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Solution Overview
Problem
Existing gas turbines face difficulties in achieving targeted gas admission to housing regions not directly in the flow path of the operating medium, limiting efficient operation and cooling of components.
Innovation Solution
The design incorporates a guide vane with a shroud arrangement and radially inward blade, featuring air passage channels in the shroud holding device to facilitate improved gas pressure and cooling, with geometrically optimized air passage channels and a tongue-and-groove connection for enhanced stability and adjustable throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional guide vanes without air passage channels are used, then the structure is simple and manufacturing is easy, but targeted gas admission to housing regions not in the flow path is difficult to achieve
Solution Approach 1:
The shroud holding device is designed to perform multiple functions: mechanically securing the shroud to the housing while simultaneously serving as a gas admission system through integrated air passage channels. This allows the same component to fulfill both structural and fluid delivery roles, enabling targeted gas admission to housing regions without requiring separate dedicated structures.
Solution Approach 2:
The shroud holding device incorporates air passage channels that create a controlled porous-like structure, allowing gas to flow through the holding device and reach target regions. The channels provide selective permeability to the housing structure, enabling gas admission while maintaining structural integrity.
2Reliability
If air passage channels are added to the shroud holding device, then targeted gas admission and cooling is improved, but manufacturing complexity increases
Solution Approach 1:
The air passage channels are integrated into the shroud holding device as a unified structure rather than being separate components. The channels are formed as part of the holding device geometry, combining the mechanical support function with the fluid delivery function in a single manufactured part, which simplifies the overall manufacturing process compared to assembling separate cooling channels.
Solution Approach 2:
The geometric design and position of the air passage channels can be optimally adapted to the respective application requirements. The channels may be designed with varying cross-sections, lengths, and orientations to optimize gas flow and cooling efficiency for specific housing regions, allowing flexible parameter adjustment during the design phase without changing the fundamental manufacturing approach.
3Measurement precision
If multiple air passage channels are distributed over the housing circumference, then gas throughput control precision is improved, but device complexity increases
Solution Approach 1:
The gas admission system is divided into multiple discrete air passage channels distributed around the housing circumference. Each channel can be independently designed and potentially controlled, allowing precise regulation of gas throughput to different radial regions. This segmentation enables fine-tuned control of cooling gas distribution without requiring a single complex centralized system.
Solution Approach 2:
The air passage channels are strategically positioned and dimensioned according to the specific cooling requirements of different housing regions, rather than being uniformly distributed. The geometric design and position of each channel can be asymmetrical to match the thermal load distribution, optimizing gas admission efficiency for each location while maintaining overall system manageability.
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
This configuration enables precise control of air or gas throughput, reduces stress concentrations, and improves durability by allowing targeted gas admission and cooling of housing components, particularly in regions not directly in the flow path, enhancing overall gas turbine performance.
Implementation Method 1
the shroud holding device or parts thereof comprise at least one air passage channel which allows flow to pass through the shroud holding device in the area of the outer shroud
Implementation Method 2
The air passage duct enables improved gas admission and cooling of further housing components such as, for example, guide vane rings and the like arranged downstream
Data Source
Figure 1~2
Figure 3~4
AI summary
The gas turbine has a housing, in which a stator vane (12) is arranged. The stator vane has a cover strip assembly (21) having a radially outer cover strip (16) and a cover strip support unit (23), by which the cover strip is fixed on the housing. A shovel blade (18) is provided, which is inwardly extending from the cover strip assembly in a radial manner. The cover strip support unit has an air passage duct (28) allowing a flow passing through the cover strip support unit. The cover strip support unit has cover strip hooks (22,26) on the side opposite to the shovel blade. An independent claim is included for a method for manufacturing a stator vane for a housing of a gas turbine.