Aircraft Engine Power Generator Inside Stationary Nose Cone
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Solution Overview
Problem
The existing configuration of aircraft engine apparatus with power generators and accessory gearboxes disposed outward of the fan case increases air resistance, leading to higher fuel consumption and a complex, heavy motive force transmission structure.
Innovation Solution
The aircraft engine apparatus is designed with aircraft equipment positioned inward of the fan case, utilizing a support member between motive force transmitters to simplify and lighten the motive force transmission structure, eliminating the need for external gearboxes and reducing the frontal area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If aircraft equipment (power generator and accessory gearbox) is disposed outward of the fan case, then the equipment can be mounted externally, but the frontal area of the aircraft engine apparatus increases and air resistance increases
Solution Approach 1:
The patent places the power generator inside the fan case, nesting the equipment within the existing engine structure rather than mounting it externally. This eliminates the need for external mounting while reducing the frontal area and air resistance of the aircraft engine apparatus.
2Ease of manufacture
If aircraft equipment is disposed outward of the fan case, then the equipment can be mounted externally, but the motive force transmission structure becomes complex and weight increases
Solution Approach 1:
The patent combines the power generator with the fan case structure, integrating multiple functions into a single unified assembly. The power generator is mounted on the fan case and driven directly by the fan, eliminating the need for separate coupling shafts and accessory gearboxes, thereby simplifying the motive force transmission structure and reducing weight.
3Object-affected harmful factors
If aircraft equipment is disposed inward of the fan case, then the frontal area is reduced and air resistance decreases, but the equipment must be positioned within the confined space
Solution Approach 1:
The patent utilizes the outer peripheral surface of the fan case as a mounting location for the power generator, making use of the available space in a localized manner. This approach allows the equipment to be positioned inward of the fan case perimeter, reducing the frontal area while providing adequate mounting space for the power generator.
4Weight of moving object
If aircraft equipment is disposed inward of the fan case, then the motive force transmission structure can be simplified and weight reduced, but the equipment must be positioned closer to the rotating shaft
Solution Approach 1:
The patent uses the fan case as an intermediary structure to transmit motive force from the rotating fan to the power generator. The fan case serves as both a structural housing and a transmission medium, allowing the power generator to be positioned closer to the rotating shaft while maintaining effective motive force transmission through the fan case mounting structure.
Data Source
AI summary
An aircraft engine apparatus (1) includes: a rotating shaft (6); a fan (10) driven by the rotating shaft; a fan case surrounding the fan; aircraft equipment (28) disposed upstream of the fan and, in a radial direction of the rotating shaft, disposed inward of a peripheral edge of the fan case; a casing (2) that accommodates at least part of the rotating shaft and supports the fan case; a first motive force transmitter (9) coupled to the rotating shaft and the fan; a second motive force transmitter (32) disposed inward of the first motive force transmitter in the radial direction of the rotating shaft and coupled to the rotating shaft and the aircraft equipment; and a support member (12) disposed between the first motive force transmitter and the second motive force transmitter, the support member coupling the casing and the aircraft equipment and supporting the aircraft equipment.