Threshing System Deslugging via Reversible Rotor Motion
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Solution Overview
Problem
Agricultural combines face challenges in efficiently and automatically removing slugs of compacted crop material from the threshing and feeder systems, which can lead to interrupted throughput and damage to components, often requiring manual intervention that is time-consuming and labor-intensive.
Innovation Solution
A system and method that includes sensors to detect slugging conditions, actuators to adjust de-awning plates or vanes, and controlled rotor movements in opposite directions to dislodge the slug, utilizing a control system with signal processing to select and execute deslugging routines based on sensed load conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual intervention is used to clear slugs piece by piece, then complete removal of slugs is achieved, but time consumption and labor intensity increase significantly
Solution Approach 1:
The system enables automatic slug detection and removal through sensors that detect slugging conditions and control systems that automatically execute deslugging routines, eliminating the need for manual intervention and significantly reducing time consumption while maintaining complete slug removal
Solution Approach 2:
Sensors continuously monitor the threshing system for slugging conditions and provide feedback to the control system, which automatically adjusts rotor movements and de-awning plate positions to clear slugs, creating a closed-loop system that responds dynamically to slug formation without manual input
2Reliability
If violent rocking motion is applied to dislodge slugs, then slug removal effectiveness improves, but risk of damage to rotor/concave/feeder components increases
Solution Approach 1:
The system dynamically adjusts rotor motion characteristics based on detected slug conditions, transitioning from normal rotational movement to controlled agitating motions with varying amplitudes and frequencies, then to violent rocking motions only when necessary and for limited durations, thereby maximizing slug removal while minimizing component stress
Solution Approach 2:
The control system applies periodic agitating motions to the rotor at different amplitudes and frequencies to incrementally work slugs free, using repeated cycles of controlled movement that gradually dislodge slugs without subjecting components to continuous violent stress
3Object-affected harmful factors
If repeated small angular rotor movements are used, then component stress is reduced, but slug breakdown effectiveness is insufficient for severe slugging conditions
Solution Approach 1:
The system dynamically adapts rotor motion characteristics based on the severity and persistence of detected slugging conditions, starting with gentle jogging motions and progressively increasing to more violent agitating motions if slugs are not cleared within a predetermined time, thereby matching the applied stress to the actual slug removal needs
Solution Approach 2:
The control system changes rotor motion parameters including amplitude, frequency, and duration of agitating motions based on sensor feedback about slug persistence, adjusting these parameters in real-time to achieve effective slug breakdown while minimizing unnecessary component stress from overly aggressive motions
4Ease of operation
If automated deslugging routines are implemented, then labor requirements are reduced, but system complexity increases
Solution Approach 1:
The control system integrates multiple functions including sensor data acquisition, slug detection algorithms, automated rotor motion control, de-awning plate positioning, and routine selection into a single multi-functional automated system that manages the entire deslugging process, reducing the need for separate manual operations while consolidating system complexity into a centralized control architecture
Data Source
AI summary
In an agricultural combine including a rotor of a threshing system, a concave positioned beneath the rotor, a rotor cage positioned above the rotor, a drive controllably operable for rotating the rotor in opposite first and second rotational directions, a control in operative control of the drive, and a sensor for sensing information representative of load conditions opposing rotation of the rotor, a method for deslugging the threshing system of the agricultural combine includes the steps of (i) sensing information representative of load conditions opposing rotation of the rotor above a pre-determined threshold, which indicates a slugging condition; (ii) activating an actuator, which adjusts one or more components to move from an initial position to a deslugging position; (iii) rotating the rotor; and (iv) sensing information representative of load conditions opposing rotation to determine whether the slugging condition still exists.