Grain Chute Layout for Cleaner Separation on a Combine Chaffer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing grain cleaning systems in agricultural combine harvesters struggle to efficiently separate grain from material-other-than-grain (MOG) due to inefficiencies in the movement and separation mechanisms, leading to grain getting caught in MOG and requiring additional separation steps.
Innovation Solution
A grain cleaning system with a return pan and chaffer that reciprocate in a fore-aft manner, combined with a grain chute that guides grain to the chaffer while bypassing MOG, using a funnel and MOG diverter to separate grain from MOG effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If grain is allowed to fall freely through openings in the return pan, then grain can separate from MOG, but grain may get caught in MOG and require additional separation steps
Solution Approach 1:
A grain chute is introduced as an intermediary component between the return pan openings and the chaffer. The chute guides grain directly from the openings to the chaffer, preventing grain from mixing with MOG in the process. This mediator component enables efficient separation without requiring additional complex separation steps.
Solution Approach 2:
The separation process is segmented into distinct pathways: one for grain (through the chute) and one for MOG (through the chaffer). By dividing the flow paths, the system prevents grain-MOG entanglement while maintaining simple reciprocating motion of the existing components.
2Ease of operation
If the return pan and chaffer reciprocate in a fore-aft manner, then crop material can be advanced and separated, but grain may become entangled with MOG
Solution Approach 1:
The grain chute serves as a mediator that decouples the reciprocating motion of the return pan from the grain flow path. Grain falls through the openings and is immediately chuted to the chaffer, preventing entanglement with MOG that is being advanced by the reciprocating chaffer motion.
Solution Approach 2:
The grain chute introduces a vertical dimension to grain flow, guiding it downward from the return pan openings directly to the chaffer. This vertical pathway separates grain motion from the horizontal reciprocating motion of the pan and chaffer, preventing entanglement.
3Productivity
If additional separation steps are added to prevent grain entanglement, then separation efficiency improves, but device complexity increases
Solution Approach 1:
The grain chute is a simple intermediary component that prevents grain-MOG entanglement without requiring multiple separation steps. It uses basic gravity-driven flow and geometric guidance, adding minimal complexity while significantly improving separation efficiency.
Solution Approach 2:
The system uses the existing reciprocating motion of the return pan and chaffer to drive grain flow through the chute and onto the chaffer. No additional power source or complex mechanism is required; the component itself performs the separation function through its geometric design.
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
Enhances the separation efficiency by guiding grain directly to the chaffer, reducing the need for additional separation steps and improving the overall cleaning process by minimizing grain entanglement with MOG.
Implementation Method 1
The grain chute is positioned in communication with one or more openings of the openings in the return pan and in communication with the chaffer to guide grain received from the one or more openings to the chaffer
Implementation Method 2
The grain chute comprises a funnel coupled to the return pan for reciprocation therewith and a material-other-than-grain (MOG) diverter coupled to the chaffer for reciprocation therewith and positioned in front of the funnel to divert MOG around the funnel
Data Source
AI summary
A grain cleaning system for use in an agricultural combine harvester comprises a return pan, a chaffer, and a grain chute. The return pan is arranged to reciprocate in a fore-aft manner to advance crop material forwardly and comprises openings allowing grain to fall from the return pan through the openings. The chaffer is arranged to reciprocate in a fore-aft manner to advance crop material rearwardly and underlies the return pan. The grain chute is positioned in communication with one or more openings of the openings in the return pan and in communication with the chaffer to guide grain received from the one or more openings to the chaffer in a manner that bypasses material-other-than-grain (MOG) advanced rearwardly by the chaffer. An agricultural combine harvester comprising a grain cleaning system with a grain chute is disclosed.