Fire Damper Blade Rotation Mechanism with Flowing Curve Coupling
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Solution Overview
Problem
Existing devices for rotating damper blades in fire dampers are complex and fail to prevent movement from open to closed positions or vice versa due to external forces, lacking a mechanism to ensure free movement initiation only through a drive mechanism.
Innovation Solution
A device with a first transmission arm connected to the damper blade axle and a second drivable transmission arm, where the coupling element is hingedly connected and guided along a flowing curve, preventing movement initiation by external forces while allowing free movement through a drive-connected drivable axle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple device with fixed coupling element is used, then the structure is simple, but the damper blade cannot be locked in open/closed positions and may flap due to external forces
Solution Approach 1:
The coupling element is made dynamically adjustable along the first transmission arm, allowing it to transition between fixed positions (for locking) and movable positions (for operation). This dynamic characteristic enables the system to adapt its behavior based on operational requirements, resolving the contradiction between simplicity and stability.
Solution Approach 2:
The position of the coupling element along the first transmission arm is changed as a control parameter. By adjusting this parameter, the system can switch between different operational modes: when the coupling element is at specific positions, it provides locking functionality; when moved to other positions, it allows free movement. This parameter change enables the system to satisfy both simplicity and stability requirements at different times.
2Reliability
If a lock mechanism is added to prevent movement, then position stability is improved, but the device complexity increases
Solution Approach 1:
The system uses the existing movement of the transmission arms during normal operation to automatically position the coupling element along the first transmission arm. The coupling element's position changes are driven by the operational movements themselves, rather than requiring an external locking mechanism. This self-service approach provides stability without adding significant complexity.
Solution Approach 2:
The coupling element serves multiple functions: it connects the two transmission arms, allows for positional adjustment along the first arm, and provides locking capability at specific positions. By making this single component multi-functional, the system achieves position stability without adding separate lock mechanisms, thus avoiding increased complexity.
3Reliability
If the coupling element is fixed to prevent movement, then position stability is improved, but the ease of operation decreases
Solution Approach 1:
The coupling element's ability to move along the first transmission arm provides operational flexibility. During drive-initiated movements, the coupling element can adjust its position to accommodate the motion requirements. This dynamic characteristic ensures ease of operation while still providing stability when needed at specific positions.
Data Source
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AI summary
The present invention relates to a device (3) for rotating a damper blade (2) of a fire damper (1) about a damper blade axle (A), in which the damper blade (2), within a specific angle range, cannot be rotated with respect to its open and its closed position as a result of a force acting on the damper blade (2), comprising a first transmission arm of the damper blade (4) on the damper blade axle (A) and a second, drivable transmission arm (5) on a drivable axle (B), which are hingedly connected by a coupling element which is arranged on the first transmission arm of the damper blade (4) such that it can be displaced, and is arranged on the second, drivable transmission arm (5) such that it can be displaced and which is guided according to a flowing curve in such a manner that, in the open and in the closed position, the first transmission arm of the damper blade (4) is positioned according to the tangent line of this curve.