Air Pressure Differential Seed Meter with Brush Belt Transfer
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Solution Overview
Problem
Existing seed meters face challenges in maintaining accurate and consistent seed spacing at higher planting speeds, particularly when transferring seeds from the metering member to the delivery system, due to difficulties in a smooth hand-off process.
Innovation Solution
A seed meter design featuring a bowl-shaped metering member with a radially inward projection and inclined apertures, which adheres seeds to the apertures and uses a brush belt delivery system to ensure consistent seed transfer, with the metering member oriented at an angle to facilitate seed entry into the delivery system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If seed falls by gravity from the meter through the seed tube, then the seed delivery system is simple, but it is difficult to maintain accurate and consistent seed spacing at planting speeds greater than about 8 kph
Solution Approach 1:
A brush belt intermediary component is introduced between the metering member and the seed tube. The brush belt captures seeds discharged from the apertures and transports them to the seed tube, ensuring consistent seed spacing even at higher planting speeds. This intermediary mechanism bridges the gap between simple gravity-based delivery and precise spacing control.
2Device complexity
If a disk meter with apertures is used, then the structure is simple, but the hand-off of seed to the delivery system is difficult to achieve in a consistent manner
Solution Approach 1:
The brush belt serves as a mediator between the disk meter and the delivery system. It receives seeds from the apertures and reliably transfers them to the seed tube, ensuring consistent hand-off. The brush belt's flexible bristles adapt to seed variations while maintaining reliable transfer at higher speeds.
Solution Approach 2:
The brush belt utilizes a flexible structure with bristles that can adapt to different seed sizes and positions. This flexibility allows the brush belt to reliably capture and transport seeds regardless of minor variations in seed discharge from the apertures, improving hand-off consistency.
3Productivity
If planting speed increases beyond 8 kph, then productivity improves, but seed spacing accuracy deteriorates
Solution Approach 1:
The brush belt intermediary maintains seed spacing accuracy at higher planting speeds by actively capturing and transporting seeds at the increased speed. It synchronizes seed transfer with the rotating metering member, ensuring consistent spacing even when the planter moves faster through the field.
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 design improves seed spacing accuracy and consistency by ensuring reliable hand-off of seeds from the metering member to the delivery system, even at higher speeds, by using a brush belt to capture and transport seeds effectively.
Implementation Method 1
use an air pressure differential, either vacuum or positive pressure, to adhere seed to a metering member
Implementation Method 2
When seed falls by gravity from the meter through the seed tube
Data Source
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AI summary
A seed meter (24) for a seeding machine has a housing (30) and a seed metering member (100) rotationally mounted to the housing. The metering member has a sidewall (104) (108) with a radially inner surfaced (08) and a radially outer surface (110) with the inner surface of the sidewall having an outwardly flared rim portion (112) extending both radially outward and axially to an outer edge. The rim portion has a plurality of apertures (114) extending through the sidewall. The metering member is oriented at an angle to the vertical such that an upper portion of the metering member extends beyond a tower portion of the metering member. This orientation allows a seed delivery system to extend into the interior of the metering member and cooperate with the overhanging inside thereof to remove seed therefrom.