Cabin Air Compressor Bracket Arc Mounting
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Solution Overview
Problem
Aircraft environmental control system components, such as cabin air compressors, face challenges in withstanding harsh environments of varying temperatures, pressures, and vibrations while being compact and lightweight, requiring innovative mounting solutions to ensure stability and efficient operation.
Innovation Solution
A support bracket for cabin air compressors featuring an arc-configured mounting hole circle with a ramped face transitioning to an upper lug, providing a coupling hole offset from the origin, which is designed to securely attach to three-way mounts and vibration isolators, ensuring stability and limiting movement in three directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a support bracket is designed to be compact and lightweight, then weight and space are reduced, but structural strength and stability may be compromised
Solution Approach 1:
The support bracket is divided into multiple functional portions: a cabin air compressor mounting portion with multiple mounting holes, a support portion with ramped and perpendicular faces, and an upper lug portion with a coupling hole. This segmentation allows each portion to be optimized for its specific function while collectively providing full structural strength despite the overall lightweight design.
2Stability of the object's composition
If mounting holes are distributed in an arc configuration, then stress is distributed more evenly, but manufacturing precision requirements increase
Solution Approach 1:
The mounting holes are arranged in an arc configuration along a circular pattern rather than a straight line or grid. This curved geometric arrangement naturally distributes stress more evenly around the mounting area, improving stability under varying loads while the arc geometry provides inherent alignment references that simplify manufacturing compared to complex asymmetric patterns.
3Adaptability or versatility
If the coupling hole is offset from the origin, then adaptability to different mount configurations is improved, but manufacturing complexity increases
Solution Approach 1:
The coupling hole in the upper lug portion is intentionally offset from the origin (center of the arc pattern) rather than being centrally located. This asymmetric positioning provides adaptability to accommodate different mount configurations and vibration isolator arrangements. The offset is designed with specific dimensional relationships (ratios between 0.48-0.50 in one direction and 2.48-2.54 in another) that create a predictable asymmetric pattern, making the bracket adaptable while maintaining manufacturability through consistent geometric relationships.
Data Source
AI summary
A support bracket for a cabin air compressor (CAC) assembly includes a CAC mounting portion with a plurality of CAC mounting holes distributed in an arc configuration along a CAC mounting hole circle radius defined from an origin. A support portion includes a ramped face that transitions to an upper lug portion and a substantially perpendicular face relative to the CAC mounting portion. An upper lug includes a coupling hole offset from a first CAC mounting hole at a first length in a first direction and a second length in a second direction. The first CAC mounting hole is offset from the origin by a third length in the first direction and a fourth length in the second direction. A ratio of the first length to the third length is between 0.48 and 0.50, and a ratio of the second length to the fourth length is between 2.48 and 2.54.