Modular Cabin Blower System for Aircraft Engine Integration
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Solution Overview
Problem
Existing cabin blower systems for aircraft are bulky and present installation and integration challenges due to their complex and congested design, which complicates their integration with the gas turbine engine's accessory gearbox.
Innovation Solution
A modular cabin blower system is designed with an electric variator, a differential gearbox, and a cabin blower compressor, where these components can be split and arranged on opposite sides of the accessory gearbox casing, allowing for a more compact and balanced configuration that fits better within the core engine accessory bay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the cabin blower system is integrated into a single combined unit with the accessory gearbox, then the system is compact and integrated, but it becomes bulky and presents installation and integration challenges in the congested accessory bay
Solution Approach 1:
The cabin blower system is divided into separate modular components including the cabin blower, electric variator, and differential gearbox, which can be independently installed and positioned around the accessory gearbox rather than as a single integrated unit
Solution Approach 2:
The modular components are arranged in different spatial configurations including opposite sides of the accessory gearbox, utilizing three-dimensional space more effectively to reduce overhang and improve installation accessibility
2Stability of the object's composition
If the cabin blower system components are arranged on opposite sides of the accessory gearbox casing, then overhang and unbalance are reduced, but the system requires more precise spatial arrangement
Solution Approach 1:
The system utilizes asymmetric arrangement of components on opposite sides of the accessory gearbox casing to achieve balance and reduce overhang, rather than symmetric configuration
Solution Approach 2:
The modular design allows for flexible spatial arrangement and positioning of components based on available space and balance requirements, rather than a fixed configuration
Data Source
AI summary
A gas turbine engine includes an engine core including a compressor, a combustor, and a turbine, the compressor being connected to the turbines through a respective shaft; and a cabin blower system comprising: an electric variator comprising a first electrical machine connected to a first shaft arranged along a first axis, a second electrical machine connected to a second shaft arranged along a second axis, and a power management system; a cabin blower comprising a compressor driven by a third shaft arranged along a third axis, the compressor comprising an air inlet and an air outlet; and a differential gearbox. The gas turbine engine further includes an accessory gearbox arranged within an accessory gearbox casing and adapted to drive the cabin blower system.