Seeding Unit Centrifugal Grain Metering
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Solution Overview
Problem
Existing seed drill technologies face challenges in achieving precise grain metering and uniform distribution of granular materials, leading to uneven spacing and reduced processing capacity, with existing solutions being complex and prone to failure.
Innovation Solution
A distribution unit with a rotating conveying device and a housing featuring a groove-like structure that supports centrifugal separation, allowing for individual grain isolation and tangential grain flow, ensuring precise and uniform delivery of granular materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If air flow is used to convey granular material, then the grains can be transported to multiple hose lines, but the consistency of grain feed is impaired and grains are deposited unevenly
Solution Approach 1:
The air flow is divided into multiple separate conveying lines, each with its own dosing unit. This segmentation allows each line to independently meter and control grain flow, maintaining feed consistency while enabling distribution to multiple locations. The patent shows separate air nozzles and dosing mechanisms for each hose line, ensuring that grains are evenly distributed across all lines without the inconsistency that occurs in shared air flow systems.
2Manufacturing precision
If complex dosing devices are used to achieve precise grain metering, then grain distribution precision improves, but device complexity increases and reliability decreases
Solution Approach 1:
The patent employs pneumatic dosing units that use controlled air flow to meter and deliver grains individually to each hose line. This pneumatic approach replaces complex mechanical dosing mechanisms with simpler air pressure-controlled systems, achieving precise grain metering through airflow regulation rather than intricate mechanical parts. The dosing units use air nozzles and pressure control to ensure consistent grain delivery without the complexity and failure-proneness of mechanical dosing devices.
3Productivity
If volumetric grain conveyance is used, then processing capacity is high, but grain spacing becomes uneven and individual plant allocation is compromised
Solution Approach 1:
The patent maintains continuous air flow through each hose line to ensure uninterrupted grain conveyance, while simultaneously using dosing units to regulate grain intake at controlled intervals. This continuous airflow with regulated dosing allows high processing capacity to be maintained without sacrificing grain spacing uniformity. The system continuously conveys grains through pressurized air while the dosing mechanisms ensure consistent spacing by controlling when grains are introduced into the flow.
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 solution enables high precision in grain metering and distribution, achieving uniform spacing and increased processing capacity while maintaining a simple and reliable construction.
Implementation Method 1
The grains are conveyed along this inner lateral surface with the support of centrifugal forces and supported by the conveying device in an approximately circular manner
Implementation Method 2
only a single grain is conveyed further due to a changed contour of the inner lateral surface of the housing, while excess grains are separated and returned to the first housing area for renewed conveyance
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
The invention relates to a distribution unit (10) for granular material such as seeds (34), fertilizer, or the like, in particular a seeding unit (12) of a distribution or seeding machine. The unit (10, 12) comprises a housing (14) with an approximately circular and/or circular segment-shaped inner surface (16), at least one inlet opening (18) for conveyed granular material or conveyed seeds (34), a conveying device (22) rotating concentrically within the housing (14) for the conveyed granular material or the conveyed seeds (34), and at least one outlet opening (24) that connects approximately tangentially to the inner surface (16). The conveying device (22) has one or more openings and/or shoulders on its outer surface, which form a pocket with the inner surface (16) of the housing in a first housing and/or conveying area.The first housing section (14) forms a chamber in which the grains (34) are compressed and conveyed in a circular motion by centrifugal forces, assisted by the conveying device (22). In a second housing and/or singulation section, due to a modified contour of the inner surface (16) of the housing (14) and under the influence of centrifugal forces, only a single grain (34) remains in the opening or in the recess of the conveying device (22), while excess grains (34) are separated and returned to the first housing section for re-conveying.