Planter Seed Delivery With Brush-Wheel Conveyor Synchronization
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Solution Overview
Problem
Existing agricultural planters face issues with inconsistent seed spacing due to gravitational forces and increased planting speeds, leading to poor seed placement and plant spacing, which affects crop yield.
Innovation Solution
A seed delivery apparatus that uses a rotating brush and synchronized conveyor system to deliver seeds with near-zero horizontal velocity relative to the ground, ensuring consistent seed spacing and minimizing seed bounce.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a gravity drop system is used to deliver seed from the seed meter to the furrow, then the device complexity is reduced, but the seed spacing consistency deteriorates due to gravitational forces causing variable seed velocity and bounce
Solution Approach 1:
A controlled environment (seed tube with guide walls and airflow) is introduced as an intermediary between the seed meter and furrow. This intermediary structure controls the seed's path and velocity, preventing uncontrolled gravitational acceleration and bounce, thereby maintaining consistent seed spacing while still using a relatively simple delivery mechanism
Solution Approach 2:
Airflow is introduced into the seed tube to interact with the falling seed. The air stream cushions the seed's descent, reduces bounce, and maintains consistent vertical velocity. This pneumatic element solves the spacing consistency problem without requiring complex mechanical delivery systems
2Productivity
If planting speed is increased to improve productivity, then the productivity increases, but the seed spacing consistency deteriorates due to seeds rolling and bouncing in the furrow
Solution Approach 1:
The system preemptively counteracts the harmful effects of high-speed planting by controlling the seed's horizontal velocity before it enters the furrow. The seed tube and airflow system prepare the seed for high-speed deposition by minimizing residual horizontal motion, preventing rolling and bounce even at increased planting speeds
Solution Approach 2:
The system dynamically adjusts the seed's velocity characteristics based on planting speed. At higher planting speeds, the controlled delivery system ensures seeds are deposited with appropriately reduced horizontal velocity components, maintaining spacing consistency across varying productivity levels
3Productivity
If seeds are delivered with high horizontal velocity to match planting speed, then the productivity increases, but the seed placement precision deteriorates due to seed bounce and roll in the furrow
Solution Approach 1:
The system changes the velocity parameters of the seed during delivery. The seed tube and airflow system transform the seed's high horizontal velocity into primarily vertical motion, with the air cushion reducing the vertical impact velocity. This parameter transformation maintains placement precision while supporting high productivity
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 system provides consistent seed spacing and optimized planting, reducing seed bounce and improving crop yield by delivering seeds with minimal horizontal velocity, regardless of planting speed.
Implementation Method 1
A vacuum source creates a pressure differential to retain seeds on the apertures of the seed disc
Implementation Method 2
The seed disc rotates, bringing the seed into engagement with the rotating brush
Implementation Method 3
The rotating brush wheel moves the seed radially outwardly along the curved outer portion of the front face of the rotating seed disc
Implementation Method 4
The singulated seeds from the seed metering system drop into the seed tube and fall via gravitational force from a discharge end thereof into the seed furrow
Data Source
AI summary
An agricultural planting implement includes a number of row units. The row units include one or more seed meters for receiving, singulating, and dispensing seed to the ground such that preferred spacing of subsequent seed is attained. A seed meter provides seeds one at time to a seed carrier, such as a brush wheel. The brush wheel may move the seeds one at a time to a seed conveyor by directly moving seeds along a curved portion of a seed disc in the seed meter. The seed conveyor may be a flighted belt, and the velocity of the seeds when transferred from the seed carrier may match the velocity of the flighted belt. The seed conveyor conveys the seeds to a position near the bottom of a furrow, and ejects the seeds with little or no horizontal velocity relative to the bottom of the furrow.