Aircraft Door Deceleration Wedge Mechanism
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Solution Overview
Problem
Current deceleration systems for aircraft door opening during compartment decompression are complex, heavy, and prone to failure, with potential failure sources in activation and coupling mechanisms, making them unsuitable for retrofitting and requiring a coupling mechanism that adds weight and complexity.
Innovation Solution
A door system with a deceleration mechanism comprising a hinge, wedge-shaped component, and activation device, where the wedge-shaped component is embedded in the floor structure to prevent interaction during normal operation and protrudes to interact with the door panel for deceleration when pressure differences exceed a threshold, eliminating the need for a coupling mechanism and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a coupling mechanism is used to connect the door to the deceleration device, then the door opening can be decelerated, but the device complexity and weight increase
Solution Approach 1:
The invention extracts and eliminates the coupling mechanism from the system. The deceleration device is directly integrated into the door assembly, removing the need for separate coupling components while maintaining the deceleration function during door opening.
Solution Approach 2:
The deceleration device is merged with the door assembly, integrating the deceleration function directly into the door structure. This consolidation eliminates the need for separate coupling mechanisms and reduces overall system complexity.
2Ease of operation
If an activation mechanism is used to trigger deceleration, then the door opening can be controlled, but the reliability decreases due to potential failure sources
Solution Approach 1:
The door system utilizes the pressure differential itself as the activation mechanism. The pressure difference between compartments automatically triggers the deceleration function without requiring separate activation devices, thereby improving reliability by eliminating potential failure points in activation mechanisms.
3Speed
If a coupling mechanism is used to connect the door to the deceleration device, then the deceleration function can be transmitted, but the weight of the door system increases
Solution Approach 1:
The invention removes the coupling mechanism from the door system, thereby eliminating its weight. The deceleration function is achieved through direct integration of the deceleration device into the door assembly, reducing the overall weight of the moving object.
Solution Approach 2:
By merging the deceleration device with the door assembly, the invention eliminates the need for separate coupling components, thereby reducing the total weight of the door system while maintaining the deceleration function.
4Ease of operation
If complex activation and coupling mechanisms are used, then the door opening can be controlled, but the ease of manufacture decreases
Solution Approach 1:
The invention extracts and removes complex activation and coupling mechanisms from the door system. The simplified direct integration of the deceleration device into the door assembly significantly improves ease of manufacture by reducing the number of components and assembly steps.
Solution Approach 2:
The merging of the deceleration device with the door assembly eliminates multiple separate components, thereby simplifying the manufacturing process. This integration reduces the number of parts that need to be manufactured, assembled, and inspected, improving overall ease of manufacture.
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 system provides a fast, reliable, and lightweight deceleration mechanism with reduced failure sources, suitable for retrofitting, and ensures controlled door opening to manage pressure differences without a coupling mechanism, enhancing safety and operational efficiency.
Implementation Method 1
the wedge-shaped component protrudes from the floor structure and interacts with the door panel such that the rotational movement of the door panel is decelerated
Data Source
AI summary
A door system with a deceleration mechanism may be adapted to control an opening of a door module that separates compartments of an aircraft and includes a door panel and a door frame. During the opening of the door module, the door panel performs a rotational movement 389 above a floor structure of the aircraft. The deceleration mechanism is operable in a normal operation mode and a deceleration mode and comprises a hinge, a wedge-shaped component that is rotatably attached to the hinge, and an activation device. The activation device is coupled to the wedge-shaped component and switches the deceleration mechanism from operating in the normal operation mode to operating in the deceleration mode when a difference in pressure between the compartments exceeds a predetermined threshold.