Pneumatic Vibration Drive for Metering Device
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Solution Overview
Problem
Conventional dosing devices for free-flowing materials face issues with high energy consumption, noise, and material magnetization due to electromechanical vibration drives, leading to inconsistent sample compaction and difficulty in cleaning.
Innovation Solution
A pneumatic vibration drive system that transmits vibrations directly to the dosing vessel without external housing parts, using a flow chamber with mass elements and compressed air to create irregular turbulence, reducing energy consumption and noise while preventing material magnetization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an electromechanical oscillating drive acts on the outside of the hopper to compact the material, then the sample material is compacted to reduce packing density fluctuations, but the energy consumption is high and noise is generated
Solution Approach 1:
The patent extracts the vibration generation function from the external hopper surface and relocates it to internal mass elements that move freely within a flow chamber. This eliminates the need for external electromechanical oscillating drives acting on the hopper outside, thereby reducing energy consumption while maintaining the compaction function.
Solution Approach 2:
The patent replaces the electromechanical oscillating drive system with a pneumatic system that introduces compressed air into the flow chamber. This substitution eliminates the need for complex electromechanical components, reducing both energy consumption and noise while achieving the same material compaction effect.
2Manufacturing precision
If an electromechanical oscillating drive is used to compact the material in the dosing spoon, then the material is compacted uniformly, but noise is generated and energy consumption is high
Solution Approach 1:
The patent replaces the electromechanical oscillating drive with a pneumatic system using compressed air to move mass elements. This substitution eliminates the noise associated with electromechanical components while maintaining effective material compaction through the movement of mass elements within the flow chamber.
3Manufacturing precision
If an electromechanical drive is used to compact the material, then the dosing precision is improved, but the material becomes magnetized and adheres to steel parts
Solution Approach 1:
The patent replaces the electromechanical drive system with a purely pneumatic system using compressed air and non-magnetic mass elements. This substitution eliminates the electromagnetic fields that cause material magnetization, allowing precise dosing to be achieved without the harmful side effect of material adhesion to steel parts.
4Manufacturing precision
If a mechanical or electromechanical oscillating drive acts on the hopper to compact the material, then the packing density is stabilized, but the device complexity and cost increase
Solution Approach 1:
The patent extracts the vibration generation function from complex external electromechanical drives and implements it through simple internal mass elements moved by compressed air. This extraction simplifies the overall device structure while maintaining the ability to stabilize packing density through material compaction.
Solution Approach 2:
The patent uses a pneumatic system with compressed air to move mass elements within the flow chamber, replacing complex electromechanical oscillating drives. This pneumatic approach reduces device complexity and cost while achieving the same material compaction and packing density stabilization effect.
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
Achieves more uniform sample compaction with reduced energy consumption and noise, and prevents material magnetization, resulting in more reproducible dosing results.
Implementation Method 1
compressed air can be introduced into the flow chamber in order to cause a flow moving the mass elements therein
Implementation Method 2
The selected pressure level influences the flow behavior, which is preferably matched to the mass elements and the flow chamber in such a way that irregular turbulence or turbulent flows occur therein
Implementation Method 3
which causes the mass element or elements to strike the chamber walls in a preferably irregular or chaotic sequence in terms of time and direction
Implementation Method 4
The desired vortices, preferably irregular in terms of time and/or direction of the mass element(s) in the chamber and the vibrations caused by their impact on the chamber walls
Implementation Method 5
Vibrations or oscillations can be transmitted to the dosing vessel without a detour via external housing parts (such as the funnel). Compared to conventional dosing devices, according to the solution according to the invention, the compression of the sample material that is desired to avoid cavities in the dosing vessel can be achieved with less energy consumption
Data Source
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AI summary
The invention relates to a metering device (1) for metering pourable material, preferably for a sample preparation device (2) for preparing pourable sample material (51), comprising at least one metering vessel (4) and an associated vibratory drive arrangement (18) for vibratory driving. For the advantageous refinement, the vibratory drive arrangement (18) comprises a flow chamber (19) with one or more mass elements (20) received therein in a moveable manner, wherein the flow chamber (19) comprises at least one fluid inlet (26) for incoming fluid and at least one fluid outlet (30) for escaping of the fluid. The invention further relates to a sample preparation device (2) for preparing pourable sample material (51), comprising at least one metering device (1) as mentioned above.