Automated Cable Conveyor Tensioning via Feedback Control
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Solution Overview
Problem
Existing drag conveyor systems require manual maintenance to maintain tension in the traction element, which is inadequate for accounting for material load and stretching over time, leading to potential operational inefficiencies and material damage.
Innovation Solution
An automated tensioning system that includes a spring housing with a lead screw/drive shaft assembly, a tensioner spring, sensors, and a motor controller to adjust the tension of the traction element dynamically, ensuring it remains within a predetermined range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual adjustment of the return sprocket or pulley is used to maintain tension, then the tensioning operation is simple, but periodic maintenance is required and the system does not account for stretching and load changes
Solution Approach 1:
The system uses sensors to detect tension element position and stretching, with a controller that automatically activates the motor to adjust the return sprocket, enabling the system to self-regulate tension without manual intervention
Solution Approach 2:
A sensor provides real-time feedback on the tension element's position and stretching to the controller, which continuously monitors and adjusts the return sprocket position to maintain optimal tension within a predetermined range
2Device complexity
If manual tensioning adjustment is performed periodically, then the system structure is simple, but operational inefficiencies occur due to downtime and material damage may result
Solution Approach 1:
The automated tensioning system operates continuously during conveyor runtime, constantly monitoring and adjusting tension without interrupting material flow, eliminating the downtime associated with periodic manual maintenance
Solution Approach 2:
The manual mechanical adjustment process is replaced with an automated electromechanical system comprising sensors, controllers, and motor-driven adjustment mechanisms
3Ease of operation
If manual adjustment is used, then the system is easy to operate, but it cannot dynamically account for stretching and load changes over time
Solution Approach 1:
The sensor continuously monitors the tension element's position and stretching, providing real-time feedback to the controller that automatically adjusts the return sprocket to maintain optimal tension
Solution Approach 2:
The system transitions from static periodic manual adjustment to dynamic continuous automated adjustment, allowing real-time adaptation to changing operational conditions including material load variations and traction element stretching
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 automated system maintains optimal tension in the traction element, reducing manual maintenance needs and minimizing material damage by automatically adjusting for stretching and load changes.
Implementation Method 1
A lead screw/drive shaft assembly including a threaded lead screw connected with a drive shaft located in the spring housing
Implementation Method 2
A tensioner spring is located between the tensioner spring support and the spring compression plate
Data Source
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AI summary
An automated tensioning system is provided for a conveyor with an endless traction element that travels around an adjustably mounted pulley or sprocket. The tensioning system includes a spring housing with a lead screw/drive shaft assembly located therein that has a pushing face that extends out of one housing end. A spring compression plate is threadingly engaged with the lead screw. A plate indicator is located on the spring compression plate. A tensioner spring is located between the tensioner spring support provided by a first housing end and the spring compression plate. A sensor is located on the spring housing that is configured to detect a position of the plate indicator. A driven wheel, rotationally engaged with the drive shaft and axially slideable thereon, is driven by a motor that is controlled by a controller configured to receive position data from the position sensor/drive shaft assembly and to actuate the motor to drive the driven wheel and rotate the lead screw and advance or retract the face so that a desired tension is maintained.