Pneumatic Grain Separator Supply Assembly for Stable Seed Airflow
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Solution Overview
Problem
Conventional seed singulation units experience pressure fluctuations due to seed accumulation in the separation area, leading to back pressure and potential interruptions in the seed sowing process.
Innovation Solution
A flow divider is used to self-regulate the air flow into two streams based on grain accumulation, preventing excessive back pressure by redirecting excess air to another unit, and an open nozzle design creates a negative pressure to enhance grain transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air is supplied through a single central opening in the rotor disc, then the structure is simple, but air distribution to all sieve baskets is insufficient and uneven
Solution Approach 1:
The single central air supply opening is segmented into multiple individual air supply openings, with each opening dedicated to supplying air to a specific sieve basket. This segmentation ensures that each sieve basket receives adequate and independent air supply, resolving the issue of insufficient and uneven air distribution while maintaining structural simplicity.
2Quantity of substance
If air supply openings are provided for each sieve basket, then air distribution is improved, but the device complexity increases
Solution Approach 1:
The air supply openings for multiple sieve baskets are merged into a single air supply channel formed by the rotor disc. The rotor disc serves as a common air distribution manifold that routes air from a single source to multiple individual openings, each connected to a specific sieve basket. This merging approach improves air distribution while minimizing the number of separate air supply components needed.
3Productivity
If the rotor disc rotates at high speed, then grain separation efficiency is improved, but centrifugal force causes air to be drawn into the rotor disc and grain to be deposited on its upper surface
Solution Approach 1:
The centrifugal force that causes harmful air infiltration and grain deposition is converted into a beneficial force by directing it toward the lower surface of the rotor disc. The air supply channel is designed to supply air specifically to the lower surface where grain is deposited, and the centrifugal force naturally directs both air and grain toward this surface, transforming the harmful effect into an enhanced cleaning mechanism.
Solution Approach 2:
The air supply is directed from the lower surface of the rotor disc, utilizing the vertical dimension beneath the rotating disc. This dimensional approach allows air to be supplied counter to the direction of grain deposition, enabling effective grain removal from the lower surface without interference from the upper surface phenomena.
4Object-generated harmful factors
If air is supplied from below the rotor disc, then grain deposition on the lower surface can be removed, but the air supply structure becomes more complex
Solution Approach 1:
The rotor disc is designed to serve multiple functions: it acts as both the rotating screening element and the air supply manifold. The air supply channel is integrated into the rotor disc structure itself, allowing the rotor disc to simultaneously perform grain separation and air distribution functions. This multi-functionality enables air supply from below without requiring separate air supply components, thus removing grain deposition while maintaining structural simplicity.
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 significantly reduces pressure fluctuations and ensures consistent seed delivery by maintaining optimal air pressure, preventing seed row gaps during sowing.
Implementation Method 1
When the rotor disc rotates at high speed, centrifugal force acts on the air supplied from below in the same direction as the rotation
Data Source
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AI summary
The invention relates to a supply assembly (10) for a pneumatic grain separator device (100) of an agricultural sowing machine, comprising an assembly housing (12) that has a separating region (26) into which a feed air flow loaded with a granular material (M) can be introduced, a separating device which is arranged in the separating region (26) for separating the granular material (M) from the feed air flow, an introducing device (30) which is arranged in the assembly housing (12) and via which the feed air flow can be introduced into a supply air flow for the grain separator device (100) after separating the granular material (M), and a flow divider (20) which is designed to separate a transport air flow loaded with granular material (M) into two feed air flows and to feed one feed air flow to the separating region (26) of the assembly housing (12).