Aircraft Flap Drive Unit with Separable Attachment for Maintenance
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Solution Overview
Problem
Existing drive units for aircraft flight control surfaces require the entire unit to be removed for maintenance, even when only one component needs repair, leading to poor workability and inefficiency.
Innovation Solution
A drive unit design that includes a connection-disconnection section allowing the attachment to be coupled and separated from the cylinder, enabling the actuator or reaction link to be removed independently, with features like flanges, bolts, and hydraulic connectors that facilitate easy coupling and decoupling, and valves to prevent fluid leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the actuator and reaction link are coupled via support shafts to form a single unit, then the structural integrity and simplicity are improved, but the maintenance workability deteriorates because the entire drive unit must be removed for repair
Solution Approach 1:
The drive unit is divided into separable components: the actuator (cylinder) and the attachment (reaction link assembly) are connected via a connection-disconnection section that allows them to be detached. This segmentation enables independent maintenance of either component without removing the entire drive unit, resolving the contradiction between structural integrity and maintenance workability.
2Reliability
If the entire drive unit is removed from the control surface for maintenance, then complete inspection and repair are ensured, but the time and effort required for maintenance increase
Solution Approach 1:
The connection-disconnection section enables the attachment to be separated from the actuator, allowing maintenance personnel to access and service individual components (actuator or reaction link) independently. This eliminates the need to remove the entire drive unit for routine maintenance, significantly reducing maintenance time while still ensuring complete inspection of the targeted component.
3Device complexity
If the actuator and reaction link are permanently coupled, then the device complexity is reduced, but the adaptability for selective maintenance deteriorates
Solution Approach 1:
The connection-disconnection section provides a dynamic coupling mechanism that transitions between connected and disconnected states. This dynamic design allows the drive unit to maintain a simple integrated structure during operation while enabling selective separation for maintenance, thereby achieving both low device complexity and high adaptability for selective maintenance.
Data Source
AI summary
A drive unit includes an actuator from which an output rod protrudes at one end of a cylinder and being coupled to a flap of an aircraft, an attachment disposed on the other side of the cylinder, a reaction link coupled to the flap at one end and to the attachment at the other end, and a connection-disconnection section allowing the cylinder and the attachment to be coupled to and separated from each other.