Vane Blade Lateral Assembly with Inclined Cavity Back Wall
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Solution Overview
Problem
Existing vane assembly methods, particularly for composite materials, face challenges in achieving sufficient resistance to shear forces due to reduced bonding surface area, especially in smaller blades with thinner platforms.
Innovation Solution
The vane assembly method involves a lateral movement of the blade into a cavity with a back wall that is inclined in the direction of the platform's thickness, increasing the assembly surface area and ensuring effective contact between the blade and platform, enhancing the bond strength to withstand operational forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bonding is used to assemble the blade to the platform, then assembly is achieved, but the bonding surface area is reduced leading to insufficient resistance to shear forces
Solution Approach 1:
The invention transitions from a conventional longitudinal insertion method to a lateral insertion method, changing the dimension of assembly movement. The blade extremity is inserted laterally into the cavity rather than from the end, enabling the inclined back wall to provide additional bonding surface area that resists shear forces effectively.
Solution Approach 2:
The invention changes the geometric parameters of the cavity by introducing an inclined back wall with a specific inclination angle. This parameter change increases the bonding surface area and improves the mechanical interlocking between the blade extremity and platform, thereby enhancing shear force resistance.
2Weight of moving object
If the blade and platform are made from composite material, then lightness is achieved, but assembly security is reduced due to smaller bonding area
Solution Approach 1:
By changing the insertion dimension to lateral movement, the invention enables the inclined back wall to engage with the blade extremity, providing enhanced mechanical interlocking and assembly security that compensates for the reduced bonding area in lightweight composite constructions.
Solution Approach 2:
The invention is specifically designed for composite material construction, where the inclined back wall geometry works synergistically with composite blade extremities to achieve secure assembly through increased surface area and improved mechanical interlocking, maintaining both lightness and reliability.
3Ease of manufacture
If a conventional cavity design is used, then assembly is simple, but bonding area is insufficient for smaller blades with thinner platforms
Solution Approach 1:
The invention modifies the cavity geometry by introducing an inclined back wall with a controlled inclination angle, increasing the bonding surface area without significantly complicating the manufacturing process. The lateral insertion method remains straightforward while providing enhanced bonding capabilities.
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 method significantly increases the bonding area and strength, particularly against shear forces, while allowing for a more compact cavity design and improved assembly security, resulting in a more reliable vane structure.
Implementation Method 1
assembly of the blade 2 to the platform 1 is usually achieved by bonding
Data Source
AI summary
A blade portion of a vane is assembled to a platform portion by insertion into a cavity in the latter, in a lateral direction from an opening in the cavity, where the cavity possesses a back wall over at least a portion of its surface area. The bonding surface area between the portions of the vane is increased. The back wall of the cavity includes an inclined portion against which the portion of the blade makes contact at the end of its insertion movement, ensuring surface contact which is favorable to achieving an increased bonding area.