Structured Top Plate Inhibits Grain Flow in Corn Head Row Unit
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Solution Overview
Problem
Conventional corn head assemblies for combine harvesters experience grain loss due to smooth surfaces allowing harvested corn and grain to slide away when insufficient crop material is processed, leading to economic losses.
Innovation Solution
A row unit top plate with a structured surface, including a stamped step feature, is designed to inhibit grain flow and retain kernels by filling gaps around the idler sprocket and gathering chain, slowing down grain movement and preventing loss during harvesting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a smooth top plate surface is used, then harvested corn can slide rearward to the auger efficiently, but grain loss increases when crop density is low
Solution Approach 1:
The top plate surface is modified with localized structured features (ridges, grooves, or patterns) in specific areas rather than being uniformly smooth or structured. This allows different regions of the top plate to have different surface properties - some areas promote grain movement while others prevent loss, resolving the contradiction between harvesting efficiency and grain loss prevention
Solution Approach 2:
The surface characteristics of the top plate are changed from smooth to structured, altering the friction and flow parameters of grain movement. This parameter change enables the surface to maintain grain retention while still allowing controlled movement toward the auger, addressing both efficiency and loss prevention
2Loss of substance
If a structured surface is added to the top plate, then grain loss is reduced, but device complexity increases
Solution Approach 1:
The grain-retaining structure is integrated directly into the top plate as a unified component rather than being a separate attachment. This merging of functions reduces overall device complexity while achieving grain loss prevention, as the structured top plate serves both structural support and grain management purposes
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 structured top plate effectively reduces kernel losses by retaining grains on the surface until they can be propelled into the downstream components of the corn header, enhancing the efficiency of grain collection and reducing economic losses.
Implementation Method 1
The top plate includes an outer surface having a structure configured to inhibit a flow of grain in a forward direction along the outer surface
Data Source
AI summary
A row unit of a corn head assembly for an agricultural harvester capable of reducing grain loss is provided. The row unit includes a frame and first and second spaced apart row unit arms mounted to the frame, and a top plate. The top plate is positioned about a rear end of the frame and includes an outer surface having a retaining structure configured to inhibit a flow of grain in a forward direction along the outer surface.