Rotor Blade Closeout Structure for Trailing Edge Device Actuation
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Solution Overview
Problem
Conventional rotor blade structures with trailing edge devices and pneumatic conduits are complex to manufacture and maintain, and there is a need for improved rotor blade structures that simplify integration and operation.
Innovation Solution
A closeout structure for a rotor blade featuring a double-W shape formed by two W-shaped members with fluid channels and ports, allowing differential pressure to activate a trailing edge device, which includes a first fluid channel for high pressure and a second fluid channel for low pressure, with a trough for sealing and a valve to selectively open and close ports, enabling efficient operation of the TE device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rotor blade structures with trailing edge devices and pneumatic conduits are used, then the rotor blade can operate the TE device, but the manufacturing and maintenance complexity increases
Solution Approach 1:
The patent merges the pneumatic conduit system with the blade structure by integrating the conduits into the foam core and skin of the blade. The conduits are formed as integral features during blade manufacturing, eliminating separate assembly steps and reducing manufacturing complexity while maintaining TE device operation capability.
Solution Approach 2:
The foam core material serves multiple functions: it provides structural support, acts as the matrix for embedding pneumatic conduits, and serves as the medium through which pneumatic pressure is distributed to the TE device. This multi-functionality reduces the number of separate components needed.
2Reliability
If traditional pneumatic conduit integration methods are used, then the TE device can be supplied with pressure, but the weight of the blade increases
Solution Approach 1:
The patent uses thin-walled pneumatic conduits formed within the foam core structure. These conduits are designed with minimal wall thickness sufficient to contain pneumatic pressure, reducing the weight of the pneumatic system while maintaining its functionality for actuating the TE device.
3Reliability
If separate pneumatic conduit systems are used, then pressure can be delivered to the TE device, but the manufacturing process becomes more complex
Solution Approach 1:
The pneumatic conduit system is segmented into multiple sections that can be independently formed and then assembled during blade manufacturing. This segmentation allows for easier fabrication of individual conduit sections and simplifies the overall manufacturing process while ensuring reliable pressure delivery to the TE device.
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 solution reduces manufacturing and maintenance complexity by integrating a low-weight, efficient mechanism for activating trailing edge devices using differential pressure, enhancing the operational capabilities of rotor blades while supporting integration of electrical components and reducing weight.
Implementation Method 1
a first fluid channel having a first port which supplies a first pressure to the TE device via the first port, a second fluid channel having a second port which supplies a second pressure to the TE device via the second port
Data Source
Figure 1A~1B
Figure 1C~1E
Figure 2A~2B
AI summary
A closeout structure for a rotor blade includes a first fluid channel for supplying a first pressure to a first port of a trailing edge (TE) device, a second fluid channel for supplying a second pressure to a second port of the TE de vice, and a trough disposed between the first fluid channel and the second fluid channel. The closeout structure forms a double- W shape.