Aircraft Propulsion T-Frame Layout for Easier Side Maintenance
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Solution Overview
Problem
Existing aircraft propulsion systems are complex and difficult to maintain due to the nested arrangement of components within the nacelle, which are obscured by external reinforcement bars, making access to maintenance elements challenging.
Innovation Solution
A propulsion assembly with a T-frame structure that allows easy access to propulsion elements, featuring a T-shaped chassis with a horizontal and vertical structure, where propulsion elements such as electric motors, fuel cells, and tanks are fixed under the horizontal structure and against the vertical structure, facilitating side access during maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If propulsion elements are nested inside the chassis with external reinforcement bars, then structural strength is improved, but access to propulsion elements during maintenance becomes difficult
Solution Approach 1:
The chassis is segmented into a T-frame structure with horizontal and vertical structures, creating distinct zones for mounting propulsion elements. This segmentation allows maintenance personnel to access elements from the side without removing reinforcement bars, while the frame itself provides structural strength.
Solution Approach 2:
The T-frame structure utilizes three-dimensional spatial arrangement by extending the horizontal structure laterally and the vertical structure downward, creating multiple access dimensions. Propulsion elements can be accessed from the side (lateral dimension) rather than requiring removal of top reinforcement bars.
2Device complexity
If propulsion elements are arranged in a nested manner inside the chassis, then device compactness is improved, but maintenance complexity increases
Solution Approach 1:
The T-frame divides the propulsion system into organized sections: electric motors mounted on the horizontal structure and fuel cells/tanks mounted on the vertical structure. This segmentation simplifies the arrangement logic and makes maintenance operations more straightforward compared to a nested configuration.
Solution Approach 2:
Instead of nesting propulsion elements inside the chassis (conventional approach), the invention inverts the arrangement by mounting elements on the external T-frame structure. This inversion simplifies access during maintenance while maintaining compact overall dimensions.
3Reliability
If reinforcement bars are added around propulsion elements, then structural reliability is improved, but access to elements during maintenance becomes obstructed
Solution Approach 1:
The T-frame structure segments the reinforcement function into the frame itself rather than requiring separate reinforcement bars around each element. The horizontal and vertical structures provide structural support while leaving side access clear for maintenance operations.
Solution Approach 2:
The reinforcement function is extracted from the form of surrounding bars and embodied in the T-frame structure. This extraction eliminates the obstruction caused by reinforcement bars while maintaining structural reliability through the frame's inherent strength.
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 T-frame structure simplifies maintenance operations by providing unobstructed access to propulsion elements, reducing the complexity and time required for maintenance tasks while ensuring efficient operation of the propulsion system.
Implementation Method 1
at least one fuel cell configured to electrically power said at least one electric motor
Implementation Method 2
at least one electric motor, each of the at least one electric motor having a drive shaft mechanically coupled to the gearbox
Data Source
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AI summary
The invention relates to an aircraft propulsion assembly (151) comprising a T-shaped frame (156) with a horizontal structure (156a) and a vertical structure (156b), a gearbox (155) fixed to the front of the frame (156), and a propulsion system (150) comprising the following propulsion elements: an electric motor (154a) driving the components of the gearbox (155), a fuel cell (154b), a tank, and a cooling system (154d), wherein the propulsion elements (154a-d) are fixed beneath the horizontal structure (156a) and against the vertical structure (156b) by means of fastening. With such an arrangement, each propulsion element is easily accessible from the side of the frame during maintenance operations.