Pavement Milling Rotor Elevation Control System
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Solution Overview
Problem
Existing machines for milling road surfaces, such as road planers and rotary mixers, require manual adjustment of the cutting rotor's vertical position, which is inefficient and lacks precision, as operators must visually confirm the elevation or rely on external assistance.
Innovation Solution
A rotor elevation control system that includes an electronic controller programmed to receive a scratch signal when the cutting rotor contacts the work surface, allowing for automatic calibration and precise adjustment of the rotor's vertical position using sensors and hydraulic actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual adjustment of the cutting rotor's vertical position is used, then the machine structure remains simple, but the milling precision and operational efficiency deteriorate due to the need for operator dismounting and visual verification
Solution Approach 1:
The patent replaces the manual mechanical adjustment system with an automated electronic control system. The electronic controller receives signals from sensors (such as GPS, inertial measurement units, or surface contact sensors) and automatically adjusts the cutting rotor's vertical position via hydraulic or electric actuators, eliminating the need for operator dismounting and visual verification while improving milling precision
Solution Approach 2:
The elevation control system enables the machine to self-adjust the cutting rotor position based on pre-stored design elevation data or real-time surface feedback. The system autonomously compares actual rotor position with target position and makes corrective adjustments without human intervention, improving both precision and operational efficiency
2Productivity
If operators visually determine the vertical elevation of the rotatable cutter, then no additional sensors are required, but the operational time and safety risks increase due to operator dismounting
Solution Approach 1:
The patent introduces sensors as intermediary devices between the cutting rotor and the control system. These sensors (such as proximity sensors, surface contact sensors, or remote sensing devices like GPS and inertial measurement units) automatically detect the rotor's vertical position and translate it into electrical signals for the electronic controller, eliminating the need for operator visual verification and improving operational efficiency
Solution Approach 2:
The system implements a closed-loop feedback mechanism where sensors continuously monitor the cutting rotor's vertical position and provide real-time data to the electronic controller. The controller compares the actual position with the desired position and automatically adjusts the elevation mechanism to maintain precision, significantly improving operational efficiency and safety
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
Enables precise and automated control of the cutting rotor's vertical position, improving milling accuracy and reducing the need for manual verification, thereby enhancing operational efficiency and safety.
Implementation Method 1
a hydraulic rotor elevation mechanism to vertically move the cutting rotor
Data Source
AI summary
A machine for milling pavement such as a road planer or a rotary mixer includes a cutting rotor for penetrating and fracturing a work surface. To adjust the vertical elevation of the cutting rotor, the machine includes a rotor elevation mechanism. The machine may also include a rotor elevation control system that is programmed to lower the cutting rotor to initially contact the work surface. When the cutting rotor initially contacts the work surface, the touch point may be used as a reference to calibrate the rotor elevation mechanism prior to further lowering the cutting rotor into the work surface.