Seeder Separation Wheel Sealing for Single-Seed Distribution
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Solution Overview
Problem
Existing seed distribution devices in precision sowing face issues with imperfect sealing of perforations, leading to seeds remaining in the distribution disc due to incomplete pressure difference cut-off, which affects the efficiency and accuracy of single-seed distribution.
Innovation Solution
A separation device with radial projections and sealing elements that fit snugly into the perforations, optimizing the sealing by conjugation of form and/or using a sealing element to ensure a sealed insertion, thereby enhancing the pressure differential isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If pins are used in the separation wheel, then the separation structure is simple, but the sealing is imperfect causing seeds to remain in the distribution disc
Solution Approach 1:
The patent applies a sealing element (gasket) that acts as a flexible film to create an effective seal between the pin and the distribution disc. The gasket deforms to fill gaps and ensures complete pressure differential cut-off, preventing seeds from remaining in the distribution disc while maintaining the simple pin-based separation structure.
Solution Approach 2:
The sealing element serves as an intermediary between the pin and the distribution disc, mediating the connection to achieve both mechanical support and effective sealing. This intermediary component resolves the contradiction by providing the necessary seal without requiring a completely different separation mechanism.
2Ease of manufacture
If the pin fits into the perforation with play, then the separation device is easy to manufacture, but the pressure difference is not interrupted effectively
Solution Approach 1:
The flexible gasket compensates for manufacturing tolerances and play between the pin and perforation. It deforms to create a tight seal even when there is dimensional variation, ensuring effective pressure difference cut-off while allowing for easier manufacturing of the pin and distribution disc components.
Solution Approach 2:
The sealing element changes the physical parameters of the interface between pin and perforation by introducing a compliant material that can adapt to dimensional variations. This allows the system to maintain precise pressure differential control despite variations in manufacturing tolerances of the rigid components.
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
Improves the efficiency of seed distribution by maintaining a consistent seal, ensuring single-seed distribution without excess seeds, suitable for various seed types, and maintaining the device's overall size.
Implementation Method 1
the radial projections are configured to fit through the inlet of the internal channel of one of the perforations in a sealed manner inside the internal channel by conjugation of form and/or by means of a sealing element
Implementation Method 2
the radial projections are configured to fit through the inlet of the internal channel of one of the perforations in a sealed manner inside the internal channel by conjugation of form and/or by means of a sealing element
Implementation Method 3
The distribution disc divides the housing into two chambers with different air pressures, creating a pressure difference, which can be positive or negative, on either side of the perforated disc
Data Source
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AI summary
The invention relates to a separation device for a granular element distribution element (1) comprising a plurality of perforations (2) each having an internal channel with an inlet and an outlet, comprising a separation wheel (6) having a rotation axis (7) and a peripheral surface (8), the separation wheel (6) having a plurality of radial projections (9) projecting from the peripheral surface (8), which are configured to insert into the internal channel of one of the perforations (2) in an insertion position, characterized in that the radial projections (9) are configured to insert through the inlet of the internal channel of one of the perforations (2) in a sealed manner inside the internal channel by conjugation of form and/or by means of a sealing element (10) in the insertion position so as to achieve sealing inside the internal channel.