Flexible Seed Meter Seal for Disk Rotation and Seed Containment
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Solution Overview
Problem
Current seeding systems face challenges in achieving precise seed placement and efficient seed distribution, particularly in high-rate seeding applications where volumetric metering is used, often compromising on seed placement accuracy due to the nature of air seeders and planter technologies.
Innovation Solution
The development of a seed meter system that includes a seed disk with radially extending teeth and a singulator, which works in conjunction with a hub and seal to ensure precise seed placement and distribution by using a combination of mechanical and airflow mechanisms to accurately dispense seeds, while a flexible seal and biasing spring enhance the system's operational efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid seal is used to prevent seed escape, then sealing effectiveness is improved, but the seal cannot accommodate disk rotation and wear
Solution Approach 1:
The patent employs a flexible seal member comprising an elastomeric material with a durometer of 40-90 that forms a lip extending toward the seed disk. This flexible membrane can deform to accommodate the rotating seed disk while maintaining sealing contact, and can wear without compromising the sealing function. The flexibility allows the seal to adapt to disk rotation and wear while preventing seed escape.
2Reliability
If the seal contacts the seed disk to prevent seed escape, then sealing is improved, but friction and wear increase
Solution Approach 1:
The flexible elastomeric seal member with a lip configuration provides seed containment through contact with the seed disk while the elastomeric material's inherent properties reduce friction. The flexibility of the membrane allows it to conform to the disk surface without requiring high contact pressure, thereby minimizing wear and energy loss from friction.
3Object-generated harmful factors
If a cleanout member with sloped surface is used to remove debris, then debris elimination is improved, but seed loss through the gap may occur
Solution Approach 1:
The flexible seal member with its lip extending toward the seed disk creates a variable gap that can be controlled to prevent seed loss. The sloped surface of the cleanout member facilitates debris removal, while the flexible seal adjusts to maintain appropriate clearance, allowing debris passage while containing seeds within the housing.
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 seed meter system achieves precise seed placement and efficient distribution, improving seed placement accuracy and reducing seed loss, even in high-rate seeding applications, by integrating mechanical and airflow mechanisms with a flexible seal and biasing spring for enhanced operational efficiency.
Implementation Method 1
a flexible seal (410) for use with a seed meter (44). The flexible seal (410) includes an elastomeric material with a durometer of 40-90
Implementation Method 2
a low-friction surface (416) that rides against the seed disk (54)
Implementation Method 3
a flexible seal and biasing spring enhance the system's operational efficiency
Data Source
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AI summary
A seed metering system (44) for metering a plurality of seeds includes a meter housing (52) having a front side (52A) and a rear side (52B) opposite and attached to the front side, a seed inlet (62) defined within the front side of the meter housing, and a seed disk (54) positioned within and rotatable relative to the meter housing. The seed disk has a first side (54B) in facing relation to the front side of the meter housing and a second side (54C) in facing relation to the rear side of the meter housing. The seed metering system further includes a seal (410) in contact with the front side (52A) of the meter housing and the first side (54B) of the seed disk.