Adjustable Flow Guide for Crop Residue Spreader Width Control
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Solution Overview
Problem
Agricultural combines face challenges in evenly distributing crop residue across the entire width of the harvested area without increasing power requirements, as header widths increase, traditional spreaders often require larger components or higher speeds to achieve adequate distribution.
Innovation Solution
A crop residue spreader system featuring counter-rotating paddles and an adjustably positioned flow guide element with undulating surfaces, allowing for controlled clearance adjustment between the paddles and the flow guide, which directs crop residue sidewardly and efficiently distributes it in a desired pattern across the field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If larger spreaders or spreader components operating at elevated speeds are used to increase sidewardly directed distribution distance, then the distribution width is improved, but the power consumption increases
Solution Approach 1:
The flow guide element is made adjustable relative to the spreader paddles, allowing the clearance to be dynamically modified. This enables optimization of the interaction between paddles and flow guide surfaces to enhance distribution width without proportionally increasing power consumption, as the system can be tuned for efficient operation at given power levels.
Solution Approach 2:
The invention modifies the geometric parameters of the flow guide element, specifically incorporating undulating flow guide surfaces that create varying clearance regions. This parameter change optimizes the flow pattern of crop residue, improving distribution effectiveness without requiring increased power input.
2Area of stationary object
If larger spreaders or spreader components operating at elevated speeds are used to increase sidewardly directed distribution distance, then the distribution width is improved, but the torque requirements increase
Solution Approach 1:
The adjustable flow guide element allows modification of the clearance between paddles and flow guide surfaces. By optimizing this clearance, the system reduces resistance to paddle rotation, thereby lowering torque requirements while maintaining or improving distribution width.
Solution Approach 2:
The undulating flow guide surfaces create optimized flow patterns that reduce energy losses and resistance forces acting on the paddles. This parameter optimization enables achieving wider distribution with reduced torque demands on the drive system.
3Productivity
If header widths have continued to increase, then the harvesting capacity is improved, but the power requirements for adequate residue distribution increase
Solution Approach 1:
The adjustable flow guide element enables the residue distribution system to adapt to varying header widths and corresponding residue flows. This adaptability allows efficient distribution across wider harvest widths without proportionally increasing power consumption, as the system can be optimized for each operating condition.
Solution Approach 2:
The undulating flow guide surfaces create optimized flow patterns that improve distribution efficiency. This allows the system to handle increased residue volumes from wider headers more efficiently, reducing the power penalty associated with scaling up harvesting capacity.
Data Source
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AI summary
A flow distribution system (40) for use with a combine spreader (24) has an inlet opening (45) for receiving crop residue, a pair of counter-rotating impellers (28, 30) comprising spreader paddles (70) disposed generally side by side and forward of a back plate (36) of the spreader, and a discharge opening below the spreader paddles. A flow guide element (42) has an apex portion (44) and a pair of opposed arm portions (46, 48) pivotally connected to the apex portion, the arm portions laterally extending to free end portions (50, 52). An adjusting mechanism (78) is operably connected to the arm portions (46, 48) to effect rotational movement of the arm portions about the apex portion, ends of spreader paddle members defining the outer swept diameters of the spreader paddles (70) and the crop residue flow surfaces of at least the arm portions defining clearance regions (67) therebetween to controllably distribute crop residue in a desired pattern over a field. The clearance region includes at least one undulation (66) formed in the arm portions (46, 48).