Harvester Threshed Material Distribution Control
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Solution Overview
Problem
Combine harvesters face inefficiencies due to non-uniform distribution of threshed material from axial flow threshing and separating devices, leading to accumulation on sieve surfaces and reduced cleaning efficiency, as existing solutions lack real-time monitoring and adaptive regulation capabilities.
Innovation Solution
An automatic uniform distribution apparatus and method using tangential and axial flow threshing devices, vibrating sieves, shaking and return plates with flow guiding mechanisms and force sensors, connected to an on-line detection controller for real-time adjustment of flow guiding mechanisms to achieve uniform threshed material distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If axial flow threshing and separating device is used, then high feeding amount and high efficiency are achieved, but threshed material is non-uniformly distributed and accumulates on sieve sides
Solution Approach 1:
The invention divides the threshed material flow into multiple segments by setting up multiple flow guiding plates (first flow guiding plate, second flow guiding plate, third flow guiding plate) at different positions. Each plate controls a specific portion of the material flow, redirecting it to achieve uniform distribution across the sieve surface, thereby resolving the accumulation problem while maintaining high productivity
Solution Approach 2:
The invention introduces adjustable flow guiding plates that can be dynamically positioned to control material flow distribution. The plates can be adjusted based on operating conditions to optimize the distribution pattern, enabling the system to adapt to varying throughput requirements while maintaining uniform material distribution on the sieve
2Measurement precision
If grain loss force sensors are used to indirectly evaluate distribution, then approximate distribution can be estimated, but real-time flow rate measurement and adjustment sensitivity are poor
Solution Approach 1:
The invention implements a feedback control system using sensors (ultrasonic sensors, infrared sensors, or capacitive sensors) that continuously monitor the actual distribution of threshed material on the sieve. The control unit receives real-time feedback signals and automatically adjusts the flow guiding plates to correct any non-uniform distribution, ensuring rapid response and precise control without time delays
Solution Approach 2:
The invention replaces indirect mechanical measurement (grain loss force sensors) with direct non-contact sensing methods (ultrasonic, infrared, or capacitive sensors). These sensors directly measure material distribution and flow rates without mechanical contact, providing real-time data with high precision and fast response for immediate adjustment
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 system ensures real-time uniform distribution of threshed material, significantly improving cleaning efficiency and performance by directly measuring and adjusting flow rates, applicable to various crops and threshing devices, promoting adaptive control in harvesting machinery.
Implementation Method 1
shaking plate force sensors mounted below the shaking plate threshed material detecting plates, and return plate force sensors mounted below the return plate threshed material detecting plates
Implementation Method 2
vibrating sieve
Implementation Method 3
chaff screw conveyor
Data Source
AI summary
An automatic uniform distribution apparatus for the threshed material from the combine harvester comprises a tangential flow threshing and separating device, a shaking plate threshed material detecting device, a shaking plate, a shaking plate flow guiding mechanism, an axial flow threshing and separating device, a chaff screw conveyor, a return plate, a return plate flow guiding mechanism, a return plate threshed material detecting device, a vibrating sieve, and an on-line detection controller. Force sensors are provided at lateral positions below discharge ports of the shaking plate and the return plate to measure flow rates of the threshed material in lateral regions of the shaking plate and the return plate.