Aircraft Pylon Reinforcer Diagonal Link Rods
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Solution Overview
Problem
The existing aircraft pylon primary structures with transverse reinforcers made from titanium have a large mass due to their bulky geometry, requiring high-power presses for forging and lacking sufficient space for incorporating elements.
Innovation Solution
Incorporating first and second link rods oriented along diagonals within the transverse reinforcers, which reduce material volume, create a larger passage section, and allow for adjustable lengths, along with connecting systems featuring webs and pivoting pins to secure these rods to the outer frame, thereby reducing mass and simplifying the forging process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If transverse reinforcers are made with bulky geometry to ensure structural strength, then strength is improved, but mass increases and requires high-power presses for forging
Solution Approach 1:
The transverse reinforcer is divided into multiple components: an outer frame and multiple inner braces (first, second, third, and fourth braces). This segmentation allows each component to be optimized independently, reducing overall material usage while maintaining structural integrity. The braces are arranged in a space-efficient configuration that provides reinforcement without requiring bulky geometry.
Solution Approach 2:
The invention introduces a three-dimensional arrangement of braces within the outer frame, utilizing diagonal and transverse orientations to distribute loads efficiently across multiple dimensions. This spatial arrangement provides equivalent or superior strength to bulky traditional designs while minimizing material volume and mass.
2Stability of the object's composition
If transverse reinforcers are made with bulky geometry, then structural integrity is maintained, but the volume of material increases
Solution Approach 1:
The reinforcer is segmented into an outer frame and multiple internal braces that work together to maintain structural integrity. This segmentation eliminates the need for bulky solid geometry while preserving strength through the distributed brace configuration.
Solution Approach 2:
Material is concentrated in strategic locations where it is most needed for structural reinforcement—the outer frame and specific brace positions—rather than uniformly distributed throughout a bulky form. This local quality approach maintains integrity while minimizing overall volume.
3Strength
If traditional transverse reinforcer design is used, then structural strength is achieved, but passage cross section at the center is reduced
Solution Approach 1:
By dividing the reinforcer into an outer frame and internal braces, the design creates open space in the center region where passage elements can be accommodated, while the segmented braces maintain structural strength along the periphery and critical load paths.
Solution Approach 2:
The inner braces are nested within the outer frame structure, creating a hierarchical arrangement that maximizes the use of available space. This nesting allows passage elements to be positioned in the central region without compromising the outer structural envelope.
4Reliability
If titanium transverse reinforcers are forged with complex geometry, then structural performance is achieved, but high-power presses are required
Solution Approach 1:
The segmented design with distinct outer frame and brace components can be forged separately using lower-power presses, then assembled through welding or other joining methods. This avoids the need for a single high-power press to forge a complex monolithic structure.
Solution Approach 2:
The three-dimensional brace arrangement achieves structural performance through spatial configuration rather than through high-pressure forging of a bulky form, reducing the power requirements for the forging process.
Data Source
AI summary
A primary structure of an aircraft pylon, which comprises upper and lower spars, right-hand and left-hand lateral panels, transverse reinforcers that are disposed in transverse planes and, each have a square or rectangular contour and at least one sole to which the upper and lower spars and the right-hand and left-hand lateral panels are fastened. At least one of the transverse reinforcers of the primary structure has first and second link rods that are oriented along diagonals of the transverse reinforcer, and connecting systems that each connect first and second ends of the first and second link rods to the sole or to one of the soles.