Cabin Air Compressor Bracket Geometry for Lightweight Vibration Stability
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Solution Overview
Problem
Aircraft environmental control system components face challenges in withstanding harsh environments, requiring compact, lightweight designs that maintain strength and stability under varying temperatures, pressures, and vibrations while ensuring efficient air conditioning and temperature control.
Innovation Solution
A support bracket for cabin air compressors is designed with a cabin air compressor mounting portion orthogonal to an access portion and a structural support portion, featuring a cross-support bracket mounting portion at an angle, upper lug, and strategically placed slotted holes, which allows for secure mounting and distribution of stress, ensuring stability and efficient installation within the aircraft system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the support bracket uses a compact and lightweight design, then the weight is reduced, but the strength and stability under harsh conditions may be compromised
Solution Approach 1:
The support bracket is divided into multiple functional portions: a cabin air compressor mounting portion, an access portion, a structural support portion, and a cross-support bracket mounting portion. This segmentation allows each portion to be optimized for its specific function while maintaining overall structural integrity with minimized weight.
Solution Approach 2:
The mounting holes are distributed in a non-symmetric arc configuration along a mounting hole circle radius, and the cross-support bracket mounting portion is formed at a specific angle relative to the access portion. This asymmetric design optimizes stress distribution and structural efficiency, providing adequate strength with minimal material.
2Stability of the object's composition
If the mounting holes are distributed in an arc configuration, then the stress distribution is improved, but the manufacturing complexity increases
Solution Approach 1:
The arc configuration of the mounting holes is defined by specific geometric parameters (mounting hole circle radius, angular distribution) that can be precisely controlled during manufacturing. This parameter-based design allows for optimized stress distribution while maintaining manufacturability through standard machining processes.
3Strength
If the cross-support bracket mounting portion is formed at an angle, then the structural integrity is enhanced, but the device complexity increases
Solution Approach 1:
The cross-support bracket mounting portion is integrated into the same bracket structure as the cabin air compressor mounting portion, rather than being a separate component. This merging of functions reduces the overall number of parts and assembly steps while maintaining the structural benefits of the angled configuration for enhanced integrity.
Data Source
AI summary
A support bracket for a cabin air compressor (CAC) assembly includes a CAC mounting portion formed substantially orthogonal to an access portion and a structural support portion. A cross-support bracket mounting portion is formed at an angle relative to the access portion. An upper lug portion is formed at an angle relative to the access portion and substantially orthogonal to an upper lug. A plurality of CAC mounting holes is formed in the CAC mounting portion. A plurality of lower slotted holes and an upper slotted hole are formed in the cross-support bracket mounting portion. A ratio of a length of longitudinal offset defined between the lower slotted holes and the upper slotted hole to a length of lateral offset between a center of at least one of the lower slotted holes and the upper slotted hole is between 2.47 and 2.91.