Turbine Guide Vane Removable Attachment Heels
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Solution Overview
Problem
Existing guide vane wheels in turbine engines face challenges with rapid and simple mounting/dismounting, particularly in bypass turbine engines, where guide vanes are difficult to replace due to complex attachment mechanisms that compromise aerodynamic performance and durability.
Innovation Solution
The guide vane design features planar attachment heels positioned between 20% and 80% of the camber line length, equidistant from the leading and trailing edges, with removable attachment fittings that allow pivoting and secure attachment to shrouds, enabling easy installation and replacement without disrupting airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex attachment mechanisms are used to secure guide vanes, then attachment durability is improved, but mounting and dismounting becomes difficult and time-consuming
Solution Approach 1:
The guide vane assembly is segmented into modular components: the guide vane body, attachment heels, and attachment fittings. This segmentation allows the guide vane to be easily attached and detached from the guide vane wheel while maintaining secure connection during operation, resolving the contradiction between attachment durability and ease of replacement.
Solution Approach 2:
The attachment mechanism transitions from a static permanent connection to a dynamic removable connection. The attachment heels with planar elements can be inserted into and removed from attachment fittings, enabling quick replacement while ensuring firm attachment when installed, thus balancing durability with ease of operation.
2Strength
If traditional attachment methods are used, then attachment strength is improved, but aerodynamic performance deteriorates due to disruption of airflow
Solution Approach 1:
The attachment heels are positioned at specific locations on the guide vane body, with planar elements arranged to provide strong attachment at the heels while keeping the aerodynamic surfaces smooth and continuous. This local differentiation allows strong attachment without disrupting the overall aerodynamic flow over the guide vane.
Solution Approach 2:
The attachment heels act as intermediaries between the guide vane body and the attachment fittings. These heels are strategically positioned and designed with planar elements that provide strong mechanical attachment while minimizing interference with the aerodynamic surfaces, thus mediating between structural strength requirements and aerodynamic performance.
3Reliability
If multiple different profile types are used in guide vanes, then aerodynamic performance is improved, but manufacturing complexity increases
Solution Approach 1:
The attachment heel design serves as a universal component that can be applied to guide vanes with different aerodynamic profiles. The standardized attachment heel structure with planar elements can accommodate various camber configurations, allowing multiple profile types to use the same attachment mechanism, thus improving aerodynamic performance through profile variety while simplifying manufacturing through component standardization.
Data Source
AI summary
The invention relates to a guide vane intended to be mounted in a turbine engine between an inner shroud (17) and an outer shroud (16), comprising a longitudinal straightening body (41) for an air flow extending between a first end (42) intended to be positioned at the inner shroud (17) and a second end (44) intended to be positioned at the outer shroud (16), the longitudinal straightening body having an aerodynamic profile defined by a leading edge (41a) and a trailing edge (41b) in the flow direction of the air flow, and by a camber line (41c) extending from the leading edge (41a) to the trailing edge (41b). It further comprises a first attachment heel (43) and a second attachment heel (45) positioned in the continuation of the longitudinal body (41) at the first end (42) and the second end (44) respectively, the first (43) and second (45) attachment heels being planar elements arranged parallel with respect to one another, each attachment heel (43; 45) being arranged at a distance from the leading edge (41a) and from the trailing edge (41b).