Dual Spreader System for Uniform Crop Residue Distribution
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Solution Overview
Problem
As combine harvesters increase in size and crop processing capability, the uneven distribution of crop residue across the field becomes a challenge, leading to 'stripes' of high and low volumes of crop residue, which can result in bare areas lacking nutrients or excess residue interfering with seeding and tilling operations.
Innovation Solution
A vertically mounted dual spreader system comprising a chaff spreader and a straw spreader, each with counter-rotating paddles, combines the two residue streams in a chute to ensure uniform distribution across the full cut width, improving the control of air and material flow for even residue distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single spreader device is used to distribute crop residue, then the device complexity is low, but the residue distribution becomes uneven creating stripes across the field
Solution Approach 1:
The spreader system is divided into two independent spreader devices: a chaff spreader and a straw spreader. Each device handles a specific type of crop residue stream separately, allowing optimized distribution patterns for each material type. The chaff spreader processes fine particles while the straw spreader handles larger stalks, preventing the stripe patterns that occur when mixed residues are spread by a single device.
Solution Approach 2:
Two separate spreader systems (chaff spreader and straw spreader) are combined into a single integrated system with coordinated operation. Both spreaders work simultaneously to distribute their respective residue streams across the field, achieving uniform overall distribution while maintaining the benefits of separate handling for different residue types.
2Productivity
If the header width is increased to process more crop, then the productivity increases, but the residue distribution becomes more uneven
Solution Approach 1:
The spreader system segments residue distribution into two independent zones handled by separate spreaders. The chaff spreader covers one portion of the swath while the straw spreader covers another, ensuring that even with increased header width, each spreader can maintain optimal distribution patterns for its designated area, preventing stripe formation across the wider field width.
3Ease of operation
If crop residue is windrowed in narrow streams, then the residue can be easily collected for baling, but the nutrient distribution across the field is uneven
Solution Approach 1:
The chaff spreader and straw spreader are merged into a coordinated system that simultaneously distributes both fine chaff particles and larger straw pieces across the full field width. This combined action ensures uniform nutrient distribution while the separate handling of residue types maintains operational efficiency for subsequent collection operations.
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 dual spreader system effectively addresses the issue of uneven residue distribution, ensuring that crop residues are evenly spread, providing consistent nutrient coverage and facilitating subsequent field operations like seeding and tilling without interference.
Implementation Method 1
a chaff spreader and a straw spreader, each having counter-rotating paddles
Data Source
AI summary
A spreader system of an agricultural vehicle for spreading crop residue including first and second spreader devices and a chute. The first spreader device includes a plurality of first paddles configured to rotate about a first axis, the rotation of the first paddles producing a first stream of crop residue. The second spreader device includes a plurality of second paddles configured to rotate about a second axis, the rotation of the second paddles producing a second stream of crop residue. The chute receives the first stream of crop residue and the second stream of crop residue flow respectively from the first spreader device and the second spreader device. The first stream and the second stream of crop residue are combined in the chute.