Fibre Tuft Feed Pressure Regulation via Exhaust Fan Control
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Solution Overview
Problem
Existing fiber-processing machines face challenges in maintaining consistent pressure conditions in the tuft feed, leading to uneven compaction and weight distribution of fiber tufts, which affects the service life and quality of the processed product.
Innovation Solution
A device with a storage tank connected to an exhaust air fan, featuring a fill level measurement and pressure measurement, allows for the regulation of air pressure to maintain constant pressure on fiber tufts at the lower limit of the storage tank, independent of the fill level, using a control system to adjust the fan's drive based on the measured fill level and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the fill level in the storage tank increases, then the storage capacity is improved, but the compaction of fiber tufts at the lower limit becomes uneven due to increasing weight of the material column
Solution Approach 1:
The patent implements dynamic pressure regulation by continuously adjusting the exhaust air fan operation based on real-time fill level measurements. As the fill level changes, the system dynamically modifies the pressure conditions in the storage tank to compensate for the changing weight of the material column, thereby maintaining uniform compaction throughout the process.
Solution Approach 2:
The system changes the pressure parameter in response to fill level variations. By monitoring the fill level and adjusting the pressure conditions accordingly, the patent compensates for the increasing weight effect of the material column, ensuring that the compaction of fiber tufts at the lower limit remains constant despite changes in storage quantity.
2Manufacturing precision
If the pressure in the storage tank is increased to improve compaction, then the uniformity of fiber tuft layer is improved, but the compression of fiber tufts in the lower area increases excessively
Solution Approach 1:
The patent employs a feedback control mechanism where the fill level is continuously measured and used to adjust the pressure conditions in the storage tank. This feedback loop ensures that pressure is only increased when necessary and to the exact extent needed, preventing excessive compression in the lower area while maintaining uniformity of the fiber tuft layer.
Solution Approach 2:
Instead of maintaining constant high pressure, the system dynamically adjusts the pressure parameter based on actual fill level conditions. This selective parameter change approach applies pressure only when and where needed, achieving uniform compaction without causing excessive compression in specific areas.
3Stability of the object's composition
If a throttle flap is used to maintain constant exhaust air pressure, then the exhaust air pressure stability is improved, but the pressure conditions in the hopper are not properly controlled leading to uneven fiber tuft compaction
Solution Approach 1:
The patent replaces the simple throttle flap mechanism with a feedback-controlled system that uses fill level measurements to actively regulate pressure conditions. This allows the system to maintain both exhaust air pressure stability and proper pressure distribution in the hopper by continuously adapting to changing fill conditions.
Solution Approach 2:
Instead of using a static throttle flap setting, the system dynamically adjusts pressure control based on real-time fill level data. This dynamic approach ensures that pressure conditions in the hopper are properly controlled throughout the filling process, preventing uneven fiber tuft compaction while maintaining overall pressure stability.
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 solution ensures uniform compaction of fiber tufts, maintaining consistent pressure and preventing compression variations, thereby enhancing the regularity and quality of the processed product and extending the service life of machine components.
Implementation Method 1
The fiber material to be processed is fed to the machines in the form of fiber tufts by pneumatic conveying. The fibers are transported in the form of fiber tufts with an air stream.
Implementation Method 2
A control of the drive of the exhaust air fan is provided to regulate the setpoint for the pressure in the storage tank
Implementation Method 3
the reservoir has a filling chute and an exhaust air duct, the filling duct and the exhaust air duct being separated by an air-permeable wall
Data Source
Figure 1
AI summary
The invention relates to a device and a method for regulating the pressure in a flake feeder (1) with a storage tank (2) which can be filled with fiber flakes (10) and an exhaust fan (3) with a drive (4). A level sensor (5) and a pressure sensor (6) are provided in the storage tank (2). A setpoint pressure is assigned to each level sensor. A control unit (15) for the drive (4) of the exhaust fan (3) is provided for regulating the setpoint pressure in the storage tank (2).