Conditioner Roll Tension Control Using Header Drive Pressure
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Solution Overview
Problem
Conventional crop conditioners operate with fixed roll tension, leading to excessive damage and plugging when processing crop materials with varying volumes or properties.
Innovation Solution
Agricultural crop conditioner system with movable conditioner rolls and a hydraulic actuator that adjusts tension based on hydraulic pressure variations to accommodate changing crop material flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed roll tension is used in conventional crop conditioners, then the structure is simple and easy to operate, but excessive damage and plugging occur when processing crop materials with varying volumes or properties
Solution Approach 1:
The patent applies the dynamics principle by replacing fixed roll tension with a dynamic tensioning system that automatically adjusts roll tension based on real-time crop material flow conditions. The hydraulic actuator continuously modulates the tension force applied to the conditioner rolls, enabling the system to adapt to varying crop volumes and properties during operation, thereby resolving the contradiction between operational simplicity and adaptability.
Solution Approach 2:
The patent implements feedback control by using sensors to monitor crop material flow rate and condition, then feeding this information back to the hydraulic tensioning system. The system adjusts roll tension in response to detected changes in crop conditions, creating a closed-loop control mechanism that maintains optimal processing conditions across varying operational scenarios, thus improving adaptability while maintaining ease of operation through automated control.
2Manufacturing precision
If high roll tension is applied to maintain small gap for thorough conditioning, then conditioning effectiveness improves, but crop material damage and plugging increase
Solution Approach 1:
The patent uses dynamic tension adjustment to optimize the gap between conditioner rolls based on real-time crop conditions. Rather than maintaining constantly high tension for thorough conditioning, the system dynamically modulates tension to achieve adequate conditioning while preventing excessive force that causes damage or plugging, thus resolving the contradiction between conditioning effectiveness and crop material protection.
Solution Approach 2:
The patent changes the tension parameter dynamically during operation based on detected crop material properties and flow conditions. By adjusting the tension parameter in response to varying conditions, the system achieves effective conditioning when needed while reducing tension to prevent damage and plugging, thereby resolving the contradiction between these competing requirements.
3Productivity
If roll tension is increased to handle larger crop volumes, then processing capacity improves, but crop material damage increases
Solution Approach 1:
The patent employs feedback control to monitor both crop material flow rate and the force applied to the rolls. When large crop volumes are detected, the system increases tension to maintain processing capacity, but simultaneously monitors for signs of excessive force or plugging conditions. The feedback loop automatically reduces tension when damage or plugging is detected, thus maintaining high productivity while preventing crop material damage.
Solution Approach 2:
The dynamic tensioning system allows the conditioner to respond in real-time to changing crop volume conditions. The system can increase tension during high-volume processing to maintain productivity, then quickly reduce tension when conditions indicate potential damage or plugging, enabling the system to maintain high processing capacity without consistently applying damaging forces.
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 crop processing by dynamically adjusting the gap between rolls to prevent damage and plugging, improving efficiency and crop handling.
Implementation Method 1
The hydraulic actuator has an actuator inlet operatively connected to the forward supply line, wherein the hydraulic actuator is configured to change the first force as an inverse function of changes in a pressure of hydraulic fluid in the forward supply line during operation of the hydraulic motor in the forward processing direction.
Data Source
AI summary
An agricultural crop conditioner comprising: a frame with a first conditioner roll rotatably mounted to the frame, and a second conditioner roll rotatably and movably mounted to the frame. A tensioner is connected between the frame and the second roll, and configured to generate a first force to bias the second roll towards the first roll. The conditioner has a roll drive circuit comprising a hydraulic pump configured to drive a hydraulic motor. A hydraulic actuator is operatively connected to a forward supply line between the pump and the motor. The hydraulic actuator is configured to change the first force as an inverse function of changes in a pressure of hydraulic fluid in the forward supply line during operation of the hydraulic motor in a forward processing direction.