Composite Turbine Vane Curved Lugs Mounting
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Solution Overview
Problem
Existing turbomachines face challenges in easily mounting composite material blades with hollow structures while effectively absorbing forces, particularly at high temperatures, due to the lack of suitable attachment mechanisms that ensure optimal force transmission and aerodynamic force absorption.
Innovation Solution
A composite material turbomachine blade design featuring a hollow blade with internal passages, integral platforms, and hooking parts formed by curved lugs that extend from the blade's walls, allowing for easy integration and force transmission similar to metal blades, with fibrous reinforcement texture continuity between the blade and platforms for enhanced force absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If composite material blades with hollow structures are used to reduce weight and improve high-temperature performance, then weight is reduced and temperature resistance is improved, but mounting difficulty increases and force absorption capability deteriorates
Solution Approach 1:
The blade structure is segmented into distinct functional zones: the hollow blade body for weight reduction, integral platforms for mounting, and curved hooking lugs for force absorption. This segmentation allows each part to be optimized independently while maintaining overall performance.
Solution Approach 2:
The blade is constructed from composite materials with continuous fibrous reinforcement texture that provides both weight reduction and structural integrity. The composite structure maintains strength-to-weight ratio while enabling complex geometries like hollow passages and integrated hooking parts.
2Weight of moving object
If composite material blades with hollow structures are used to reduce weight and improve high-temperature performance, then weight is reduced and temperature resistance is improved, but force transmission capability deteriorates
Solution Approach 1:
The hooking parts are formed as curved lugs that extend from the blade walls. The curved geometry optimizes stress distribution and force transmission paths, allowing effective absorption of aerodynamic forces while maintaining the lightweight composite structure.
Solution Approach 2:
The hooking parts are integrally formed with the blade body, merging the mounting function directly into the blade structure. This eliminates separate attachment components and ensures continuous fiber reinforcement throughout the load-bearing paths.
3Ease of operation
If hooking parts are added to composite blades for mounting, then mounting capability is improved, but device complexity increases
Solution Approach 1:
The hooking parts are integrally formed with the blade body, merging the mounting function directly into the blade structure. This eliminates separate attachment components and ensures continuous fiber reinforcement throughout the load-bearing paths.
Solution Approach 2:
The curved hooking lugs serve multiple functions: they provide mounting attachment points, absorb aerodynamic forces, and maintain structural continuity with the blade body. This multi-functionality reduces the need for separate components.
Data Source
Figure 1
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AI summary
A turbomachine vane (10) made from composite material comprises a hollow blade (12) including an internal passage (11) extending along the entire length thereof, an internal platform (14) and an external platform (16). The blade is extended on the external side of the external platform by an upstream attachment portion and a downstream attachment portion for mounting the vane in a casing, said attachment portions being formed by attachment lugs (24, 26, 28) extending from external longitudinal ends of lower surface (12a) and upper surface (12b) walls of the blade, with the fibrous reinforcement texture of the composite material extending continuously between said walls and the attachment lugs.