Rotatable Bellows Coupling for Aircraft Duct Displacement
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Solution Overview
Problem
Air conditioning systems in aircraft face challenges due to dynamic, aerodynamic, and thermal forces that cause displacement and orientation changes in components, leading to potential fluid connection disruptions between modules.
Innovation Solution
A flexible and rotatable coupling made of elastomeric material with convolutions and SAE AS1650 standard rotatable connections, allowing for relative movement and maintaining sealed fluid connections between diverter valve and overboard exhaust despite changes in component positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rigid couplings are used to connect air conditioning modules, then structural strength and connection stability are improved, but the system cannot accommodate displacement and orientation changes caused by aircraft dynamic forces
Solution Approach 1:
The coupling incorporates a bellows component with convolutions that can dynamically expand and contract to accommodate relative displacement between modules. This dynamic structure allows the coupling to adapt to changing positions while maintaining a sealed fluid connection, resolving the contradiction between structural strength and adaptability to displacement.
Solution Approach 2:
The bellows is constructed from flexible material with convolutions that can deform elastically to absorb displacement forces. This flexible structure maintains connection integrity while accommodating movement, enabling the system to handle both strength requirements and displacement adaptability simultaneously.
2Adaptability or versatility
If flexible coupling is used to accommodate displacement, then adaptability to position changes is improved, but rotational capability and sealed connection maintenance become problematic
Solution Approach 1:
The coupling includes a rotatable connection component that enables rotational movement while maintaining fluid sealing. This dynamic rotational capability allows the coupling to follow the orientation changes of connected modules during aircraft operation, preserving sealed connection reliability while accommodating displacement and rotation simultaneously.
Solution Approach 2:
The flexible bellows structure with convolutions can deform to accommodate both linear displacement and rotational movement while maintaining its sealed integrity. The convolution design allows the bellows to expand, contract, and twist without compromising the seal, ensuring reliable fluid connection under varying conditions.
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
The coupling ensures a stable and sealed fluid connection between components, maintaining functionality despite relative movement and orientation changes, ensuring continuous operation of the air conditioning system.
Implementation Method 1
A flexible and rotatable coupling made of elastomeric material with convolutions
Data Source
Figure 1
Figure 2A
Figure 2B~2C
AI summary
A coupling (28) includes a body (36) with two ends (40A, 40B) and a bore (38). Each end section (42A, 42B) includes a rotatable connection (34A, 34B) and a convolution (32A, 32B), and there is a bent elbow section (44) between the end sections (42A, 42B).