Milling Drum Drive Control for Energy Reduction
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Solution Overview
Problem
Self-propelled construction machines for working ground pavements face challenges in reducing energy and fuel consumption during operation, necessitating a more environmentally friendly approach.
Innovation Solution
The implementation of a monitoring system that automatically detects interruptions in the working operation and interrupts the drive of the milling drum, reducing energy consumption by decoupling the milling drum from the drive unit when not in use, and re-engaging it only when the machine is ready to resume work, ensuring efficient energy usage and minimizing material ejection during height adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the milling drum is continuously driven by the drive unit, then the machine is ready to work immediately when needed, but energy and fuel consumption increase during non-working periods
Solution Approach 1:
The control device monitors operating parameters (speed, milling depth) in advance and detects working condition interruptions before they occur. When an interruption is detected, the system proactively interrupts the drive unit and raises the milling drum, preparing for energy savings while maintaining the ability to quickly resume work by lowering the drum and restarting the drive unit when working conditions are restored
2Loss of energy
If the milling drum is raised during non-working operation to save energy, then fuel consumption decreases, but the machine cannot immediately resume working when needed
Solution Approach 1:
The control device continuously monitors operating parameters including speed and milling depth, creating a feedback loop that detects when working conditions are interrupted. This feedback triggers automatic interruption of the drive unit and raising of the milling drum. The system then monitors for restoration of working conditions and automatically resumes operation, minimizing time loss while optimizing energy consumption during non-working periods
3Productivity
If the milling drum is driven at high speed to reach operating condition quickly, then productivity increases, but material may be ejected during height adjustments
Solution Approach 1:
The control device ensures the milling drum reaches its operating rotation speed before lowering it to engage with the ground pavement. This preliminary acceleration action prevents material ejection that would occur if the drum were lowered while stationary or moving slowly, as the centrifugal force from high rotation speed keeps material secured during the height adjustment and engagement process
Data Source
AI summary
In a self-propelled construction machine for working ground pavements comprisingat least one machine frame,at least one height-adjustable milling drum for working the ground pavement in a working operation, driven by at least one drive unit,at least one control device for monitoring and controlling the milling depth of the milling drum and the speed of the construction machine,it is provided for the following features to be achieved: that a monitoring device detects an interruption of the working operation, and when detecting the interruption of the working operation emits a signal to interrupt the drive of the milling drum.