Potato Harvester Separation System with Retaining Element
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Solution Overview
Problem
Current separating devices for potato harvesters and root crop processing machines face challenges in achieving high throughput while ensuring the crop is free of contamination and minimizing energy consumption, with existing solutions often resulting in product damage during the separation process.
Innovation Solution
A compact separating device utilizing a retaining element and multiple air currents to create a fluidic separating bed, where the mixture is loosened by a drop stage and air flow, allowing the crop and solids to be separated by opposing conveying directions, with adjustable retaining element positions and air flow configurations for optimized separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional separation devices use single airflow or simple conveyor mechanisms, then the device complexity is low, but the productivity and separation efficiency are insufficient
Solution Approach 1:
The separation device is divided into multiple functional zones: a first separation zone with a first airflow for initial separation, and a second separation zone with a second airflow for further separation. This segmentation allows each zone to perform a specific separation function, increasing overall productivity while keeping each individual zone relatively simple in design.
Solution Approach 2:
The patent introduces multiple airflows acting in different directions and planes. The first airflow acts in a first direction while the second airflow acts in a second direction, creating a multi-dimensional separation approach. This dimensional expansion enables more effective separation and higher throughput without requiring complex mechanical moving parts.
2Productivity
If stronger airflows are used to increase separation speed and throughput, then productivity improves, but energy consumption increases
Solution Approach 1:
The separation process is segmented into multiple stages with different airflow intensities. The first airflow provides initial separation with moderate energy input, while the second airflow performs further separation. This staged approach achieves high throughput while avoiding the need for a single high-energy airflow, thus reducing overall energy consumption.
Solution Approach 2:
The patent employs continuous airflow separation throughout the conveying process, with multiple airflows acting simultaneously or sequentially on the mixture. This continuous separation action maintains high throughput without requiring intermittent high-energy pulses, resulting in more efficient energy utilization.
3Manufacturing precision
If mechanical separation methods are used to ensure thorough separation, then separation precision improves, but product damage increases
Solution Approach 1:
The patent replaces mechanical separation mechanisms (such as conveyors, screens, or mechanical sorters) with pneumatic separation using multiple airflows. The first airflow and second airflow selectively lift and redirect different components of the mixture based on their aerodynamic properties, achieving precise separation without mechanical contact that could cause product damage.
Solution Approach 2:
The invention uses pneumatic forces (multiple airflows) as the primary separation mechanism. By controlling the direction, strength, and timing of the first and second airflows, the system achieves precise separation of harvested material from impurities without the mechanical contact that would cause damage to delicate products.
4Manufacturing precision
If multiple separation stages are implemented to reduce contamination, then purity improves, but device complexity increases
Solution Approach 1:
The separation system is segmented into functional zones rather than requiring multiple separate machines or complex multi-stage mechanisms. The first separation zone with its airflow and the second separation zone with its airflow work in sequence within a unified structure, achieving high purity separation while maintaining relatively simple device architecture.
Solution Approach 2:
The patent employs a multi-functional separation system where multiple airflows serve both separation and conveying functions simultaneously. The first airflow and second airflow not only separate different materials but also propel them through the system, reducing the need for additional dedicated conveying mechanisms and thereby limiting the increase in device complexity.
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 approach enables efficient separation of crops from solids with high throughput and reduced energy consumption, minimizing contamination and product damage, by leveraging air flow and mechanical excitation to overcome gravity and direct components into separate conveying paths.
Implementation Method 1
at least one airflow, directed in such a way that at least the harvested material and the solids - as sorted individual parts - can be conveyed separately in their respective conveying directions
Implementation Method 2
The separation of the parts occurs because a gravity-based stratification process in the area of the conveyor belt separates the heavier from the lighter materials
Implementation Method 3
at least one retention element is provided, directed against the falling material and interacting with the at least one airflow. This retention element, which slows down and 'stimulates' the falling of the mixture
Data Source
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AI summary
The invention relates to a separation system for a potato harvesting machine or a preparation machine for separating potatoes, or similar crops, from a mixture of clods, stones, and similar solid bodies. A conveying assembly is thereby utilized to feed the essentially compact mixture as a delivery flow, from where the mixture displaced into the area of at least one drop stage, and thereby influenced by way of a conveying means in the form of an air stream, can be separated. Thereafter, at least the harvested material and the solid bodies, respectively, can be moved on as individual separated goods, and can be moved out of the separation system. The system according to the invention is characterized in that subsequently to the drop stage bringing about a loosening of the mixture, at least one retaining element located opposite the falling separated goods and interacting with the at least one air stream is provided. It is thus achieved in a surprisingly simple way that from there, at least the harvested material and the solid bodies, respectively, can be moved on separately in an essentially opposite conveying direction as sorted individual lots.