Harvester Transfer Spout Active Damping for Vibration Control
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Solution Overview
Problem
Self-propelled agricultural harvesters face issues with transfer device vibrations due to ground excitation, leading to inaccurate material transfer and loss, as existing damping systems are insufficient in effectively mitigating these vibrations.
Innovation Solution
A harvester system incorporating a hydraulic actuator and control and regulation device with proportional valves, sensors, and H-infinity or LQI control to actively dampen transfer device vibrations, ensuring precise alignment and reduced material loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the transfer device is made larger and heavier to handle more material, then the material transfer capacity increases, but the vibrations around the horizontal axis of rotation increase
Solution Approach 1:
The patent applies active dynamic vibration compensation by mounting sensors on the transfer device to detect vibrations in real-time, then using hydraulic actuators to dynamically adjust the transfer device's position and counteract the vibrations, allowing the system to maintain stability despite large size and weight
Solution Approach 2:
The patent implements a feedback control system where sensors continuously monitor the transfer device's vibrations and feed this information to a control unit, which then actuates hydraulic cylinders to compensate for detected vibrations, creating a closed-loop system that maintains stability
2Stability of the object's composition
If the transfer device is made more rigid to reduce vibrations, then the vibration resistance improves, but the ability to adapt to ground excitation and maintain alignment deteriorates
Solution Approach 1:
The patent makes the transfer device dynamically adjustable by incorporating hydraulic actuators that can actively change the device's position and orientation in real-time, allowing it to adapt to ground excitation while maintaining vibration resistance through active compensation
3Stability of the object's composition
If active vibration damping systems are added to reduce vibrations, then the vibration control improves, but the device complexity increases
Solution Approach 1:
The patent uses hydraulic actuators connected to the transfer device's support structure to provide vibration damping, leveraging hydraulic systems' ability to deliver high force with compact components, thus achieving effective vibration control without excessive complexity
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 effectively reduces transfer device vibrations, improving material transfer accuracy, reducing mechanical stress, and enhancing operator comfort by precisely adjusting the transfer device's position and damping vibrations.
Implementation Method 1
A hydraulic actuator may be mounted on the machine frame and operatively connected to the transfer device. The hydraulic actuator may be configured to rotate the transfer device about a horizontal axis of rotation relative to the machine frame
Implementation Method 2
The control and regulation device may be configured to reduce vibration of the transfer device by adjusting a volume flow of a hydraulic fluid to the hydraulic actuator
Data Source
AI summary
A self-propelled agricultural harvester. A harvester, such as a forage harvester, may comprise a machine frame, a transfer device mounted on the machine frame for transferring processed harvested material to a transport vehicle, and a hydraulic actuator connected to the transfer device. Using the hydraulic actuator, the transfer device may be rotated about a horizontal axis of rotation relative to the machine frame, and thereby a position of an end outlet of the transfer device may be changed. To reduce the vibration of the transfer device, a control and regulating device regulates vibration behavior of the transfer device to dampen vibrations of the transfer device. The control and regulating device determines a manipulated variable for controlling a proportional valve, which is operatively connected to the hydraulic actuator and is designed to adjust a volume flow of hydraulic fluid to the hydraulic actuator, for damping the vibrations of the transfer device.