Adjustable Distributor Head for Uniform Seed Distribution
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Solution Overview
Problem
Existing distributor heads for agricultural machines face challenges in achieving even seed distribution and controlling air flow when blocking outlets, leading to issues like excessive air velocities and the 'coffee grinder effect, with existing solutions either causing clogging or failing to reliably block seeds of different sizes.
Innovation Solution
A distributor head with adjustable angular positioning of the distributor body relative to the feed pipe and variable air passage control in blocking elements, allowing for fine-tuning of air flow and preventing seed accumulation, using wedge-shaped blocking elements with adjustable gaps to direct air and seeds effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If blocking elements are inserted into individual outlets to change row spacing, then the number of active outlets is reduced, but excessive air velocity occurs in uncovered outlets and seed distribution becomes uneven
Solution Approach 1:
The blocking elements are designed with localized air outlet openings that allow air to pass through specific regions while blocking seeds. This creates different flow characteristics in different areas of the distributor head, enabling row spacing adjustment without causing excessive air velocity in uncovered outlets. The air outlet openings are strategically positioned to maintain balanced air distribution across all outlets.
Solution Approach 2:
The air outlet openings in the blocking elements can be adjusted in size and position to change the air flow parameters. By modifying the opening dimensions, the air velocity and pressure distribution are optimized to prevent both excessive speed in uncovered outlets and the coffee grinder effect, while maintaining even seed distribution across variable row configurations.
2Reliability
If air outlet openings in blocking elements are made smaller to retain seeds, then seed blocking improves, but air passages become prone to clogging
Solution Approach 1:
The blocking elements incorporate adjustable air outlet openings that can be dynamically modified during operation. This allows the system to adapt the opening size based on operational conditions - smaller openings when seed blocking is critical, and larger openings when air flow efficiency is prioritized, preventing both clogging and unreliable seed retention.
Solution Approach 2:
The air outlet openings serve as an intermediary mechanism between seed retention and air flow requirements. Rather than using extremely small fixed openings that clog easily, the adjustable openings provide a middle ground that can be optimized for each operational scenario, balancing seed blocking reliability with air flow efficiency.
3Manufacturing precision
If air flow is reduced to compensate for excessive velocity in uncovered outlets, then air velocity balance improves, but air flow in the supply pipe becomes insufficient to transport seeds
Solution Approach 1:
The air flow control is segmented into multiple independent air outlet openings distributed across the blocking elements. This allows different regions of the distributor head to have optimized air flow characteristics, maintaining sufficient overall air flow for seed transport while locally controlling velocity in specific outlet areas to prevent excessive speed and ensure even distribution.
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 reliable and even seed distribution across different grain sizes by controlling air flow and preventing seed accumulation, reducing the risk of clogging and the 'coffee grinder effect, while maintaining optimal air pressure and flow rates.
Implementation Method 1
seed, fertilizer or similar granular substances are usually guided from a seed hopper through a tube to a distributor head with the aid of an air stream
Implementation Method 2
air outlet openings in the form of bores or holes, the size of which is dimensioned such that on the one hand the seed grains be retained, but air can pass through the blocking elements
Data Source
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AI summary
The present invention relates to a distributor head for an agricultural machine, in particular a seed drill and/or fertilizer spreader, for the pneumatic distribution of seed, fertilizer, or the like, with a plurality of outlets (5) leading from the distributor head to application elements of the agricultural machine, and a central feed pipe (4) opening approximately centrally into a distribution chamber (3) of the distributor head. According to the invention, the distributor head is characterized in that the distributor body (2), in which the distribution chamber (3) is formed, is mounted so as to be tiltable in all directions relative to the feed pipe (4), and an adjusting device (16) is provided for adjusting the angular position of the distributor body (2) relative to the feed pipe (4).