Single Actuator Leading Edge Door Mechanism
Solution Overview
Problem
Existing leading edge structures for aircraft flow control systems, particularly in Hybrid Laminar Flow Control systems, are complex and costly due to the need for dual doors and actuators in air inlet/outlet devices, which increases weight and complexity.
Innovation Solution
A simplified leading edge structure design where both doors are pivotable between outlet, closed, and inlet positions using a single actuator, with a linkage or gear transmission system, reducing the number of parts and weight by allowing a single actuator to control both doors symmetrically or asymmetrically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dual doors and actuators are used in air inlet/outlet devices, then air flow control functionality is achieved, but device complexity and weight increase
Solution Approach 1:
The patent merges the functionality of two separate actuators into a single actuator that controls both doors symmetrically. The actuator is connected to both doors via linkages, allowing one actuator to perform the work of two, thereby reducing device complexity while maintaining air flow control functionality.
Solution Approach 2:
The single actuator serves multiple functions by controlling both the first door and the second door. This multi-functional design eliminates the need for separate actuators for each door, reducing the overall number of components and simplifying the device structure.
2Reliability
If dual doors and actuators are used in air inlet/outlet devices, then air flow control functionality is achieved, but weight increases
Solution Approach 1:
The patent combines two actuators into one, directly reducing the weight of the moving parts. The single actuator with linkage mechanisms to both doors eliminates the mass of redundant actuators, mounting structures, and control systems, thereby reducing overall device weight.
Solution Approach 2:
The single actuator performs the work of two actuators, reducing the total mass required for actuation. This multi-functional design reduces weight by eliminating duplicate heavy components while maintaining the necessary air flow control capabilities.
3Ease of manufacture
If multiple separate panel parts are used, then manufacturing flexibility is improved, but device complexity increases
Solution Approach 1:
The leading edge panel is divided into multiple separate panel parts (first panel part with micro pores, second panel part with air inlet/outlet devices). This segmentation allows each part to be manufactured independently with optimized processes, improving ease of manufacture while the parts are subsequently assembled into a complete structure.
Solution Approach 2:
The patent separates functional elements into different spatial locations: micro pores are embedded in the leading edge panel surface, while air inlet/outlet devices are positioned in side portions. This spatial distribution allows independent manufacturing and assembly, reducing overall device complexity through modular construction.
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
This design simplifies the air inlet/outlet mechanism, reduces weight and costs, and enhances the efficiency of air flow management by minimizing the number of components required for actuation, while maintaining effective air flow control.
Implementation Method 1
air from the ambient flow can be sucked in through the micro pores into the plenum
Implementation Method 2
The leading edge panel comprises a plurality of micro pores, such as perforations, forming a fluid connection between the plenum and the ambient flow
Data Source
AI summary
A leading edge structure (11) for a flow control system of an aircraft (1), including a leading edge panel (13) that surrounds a plenum (17), wherein the leading edge panel (13) has a first side portion (21), a second side portion (27), an inner surface (33) and an outer surface (37), wherein the leading edge panel (13) having micro pores (45) forming a fluid connection between the plenum (17) and the ambient flow (39), wherein a first air inlet/outlet device (49) is arranged in the first side portion (21) and a second air inlet outlet/device (51) is arranged in the second side portion (27), fluidly connected to the plenum (17), and wherein the first air inlet/outlet device (49) comprises a pivotable first door (55) and the second air inlet outlet/device (51) comprises a pivotable second door (61).