Two-disc spreader uniform distribution at field tramline borders
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Solution Overview
Problem
Two-disc spreaders face challenges in achieving uniform spreading material distribution when transitioning from field tramlines to border tramlines arranged at angles, leading to uneven distribution and excessive or inadequate application of grit in certain areas.
Innovation Solution
The dosing element of the distributor disc facing the border tramline is switched off once a minimum lateral distance is reached, and the distributor disc facing away from the border tramline increases its dosing quantity and adjusts its spreading pattern to ensure even distribution, with changes in drop point and speed to overlap the distribution of the other disc, ensuring uniformity and preventing excessive application beyond the field boundary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the spreader drives through field tramlines at angles to the border tramline, then the spreading fans can overlap to achieve uniform distribution in the field interior, but the transition area between field tramlines and border tramline shows uneven distribution
Solution Approach 1:
The patent applies local quality by differentiating the operation of the two distributor discs based on their position relative to the border tramline. The dosing element of the distributor disc facing the border tramline is switched off when a minimum lateral distance is reached, while the other distributor disc continues operation with adjusted parameters. This localized control resolves the contradiction by adapting the spreading behavior to the specific spatial context of each distributor disc.
Solution Approach 2:
The patent implements dynamics by continuously adjusting the dosing quantity and spreading pattern of the distributor discs based on the spreader's position and orientation. The system dynamically switches the dosing element on/off and modifies drop point and speed according to whether the spreader is in the field interior or transition area, enabling adaptive response to changing geometric conditions during headland passage.
2Manufacturing precision
If the dosing element of the distributor disc facing the border tramline remains active in transition areas, then continuous distribution is maintained, but excessive application of spreading material occurs beyond the field boundary
Solution Approach 1:
The patent applies preliminary anti-action by proactively switching off the dosing element of the distributor disc facing the border tramline before the spreader crosses the boundary. By anticipating the potential for excessive application and preemptively stopping material discharge, the system prevents the harmful effect of over-application beyond the field boundary while maintaining uniform distribution within the field.
3Manufacturing precision
If the distributor disc facing away from the border tramline increases dosing quantity in transition areas, then uniform distribution is maintained, but the spreading pattern must be adjusted to prevent overlap issues
Solution Approach 1:
The patent implements parameter changes by modifying the dosing quantity, drop point, and speed of the distributor disc facing away from the border tramline when operating in transition areas. These parameter adjustments enable the distributor disc to compensate for the switched-off counterpart and maintain uniform spreading distribution, resolving the contradiction through controlled variation of operational parameters.
Data Source
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AI summary
The method involves increasing the dosage of the boundary lane (3e) at remote distributor disc. The spreading pattern of the boundary lane at remote distributor disc is changed. The delivery point of the spreading material on the boundary lane is changed against or towards the rotation direction of the distributor disc. The rotation speed of the boundary lane is increased so the spreading material distribution is performed on the boundary lane facing side of the two-disc scatterer (2) in which the minimum lateral distance is not exceeded again. An independent claim is included for a two-disc scatterer.