Segmented Metering Roller with Circumferential Shut-off Sliders
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Solution Overview
Problem
Existing dosing units for pneumatic distribution machines, such as seeders and fertilizers, require complex and space-consuming mechanisms for independently controlling individual dosing wheel segments, leading to inefficiencies and potential damage to sensitive materials during operation.
Innovation Solution
The dosing unit incorporates shut-off sliders within the dosing housing, designed with an axial inclination and circular arc movement, allowing independent activation or deactivation of dosing wheel segments without requiring large installation space, and can be operated manually or remotely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex mechanisms are used for independently controlling individual dosing wheel segments, then precise control of dosing quantities is improved, but device complexity and installation space increase
Solution Approach 1:
The dosing wheel is divided into multiple independent dosing wheel segments (first, second, third segments), each可控 independently through separate shut-off sliders. This segmentation allows precise control of dosing quantities for different material types without requiring a completely different dosing wheel, reducing overall system complexity while maintaining measurement precision.
Solution Approach 2:
The shut-off sliders are designed to be movable along the dosing wheel circumference, dynamically adjusting which dosing wheel segments are active. This dynamic configuration allows the system to adapt to different dosing requirements without complex fixed mechanisms, simplifying the control system while maintaining precise dosing control.
2Measurement precision
If multiple independently operable shut-off valves are added to control each dosing wheel segment, then dosing precision is improved, but device complexity and space requirements worsen
Solution Approach 1:
Multiple shut-off sliders are merged into a compact arrangement along the dosing wheel circumference, sharing common structural elements and control mechanisms. This consolidation reduces the total space required compared to having completely separate shut-off valves for each dosing wheel segment, while still maintaining the ability to independently control each segment for precise dosing.
Solution Approach 2:
The shut-off sliders are positioned and moved in a circumferential dimension along the dosing wheel, rather than requiring additional radial or axial space. This dimensional arrangement allows multiple independently operable shut-off mechanisms to be compactly integrated without significantly increasing the overall footprint of the dosing unit.
3Adaptability or versatility
If dosing wheel segments are deactivated during operation, then adaptability to different material types is improved, but risk of material damage from sudden cutoff worsens
Solution Approach 1:
The shut-off sliders are positioned upstream of the dosing wheel segments, allowing material flow to be gradually reduced before complete cutoff. This preliminary action prevents sudden stops that could damage sensitive materials like seeds, while still enabling quick adaptation between different material types by selectively deactivating dosing wheel segments.
Data Source
Figure 1~5
Figure 6~7
Figure 8A~10C
AI summary
A metering unit (5) for pulverulent or particulate material to be distributed, such as seed or fertilizer, is proposed. The metering unit comprises a metering roller (23) having at least two metering-wheel segments (23a, 23b, 23c), which is mounted in a metering housing (20) having an inlet (21) and an outlet (22), wherein each metering-wheel segment (23a, 23b, 23c) is assigned a shut-off slide (26, 27, 28), actuable independently of one another, in order to put one or more metering-wheel segment(s) (23a, 23b, 23c) out of operation as required. According to the invention, the shut-off slides (26, 27, 28) are mounted in the interior of the metering housing (20), wherein they have an inner circumference substantially in the form of a circular arc and are actuable in the circumferential direction of each metering-wheel segment (23a, 23b, 23c) of the metering roller (23) between a shut-off position, in which they are arranged between the inlet (21) and/or outlet (22) and the particular metering-wheel segment (23a, 23b, 23c) and put the particular metering-wheel segment (23a, 23b, 23c) out of operation, and at least one opening position, in which the inlet (21) and the outlet (22) are connected to the particular metering-wheel segment (23a, 23b, 23c). The invention also relates to a distribution machine having such a metering unit (5).