1. Types and Adjustment of Tensioning Devices
Screw Tensioning: Adjusts the tensioning stroke by rotating the screw, suitable for short-distance conveyors.
Weight Tensioning: Adjusts the tension by adding or removing counterweights; ensure the weight is vertical and free from obstruction.
Hydraulic/Automatic Tensioning: Uses a constant tension controller to dynamically adapt to load changes, providing higher accuracy.
2. Adjustment Steps
Shutdown and Inspection: Disconnect the power supply and check that the belt is free from damage or abnormal joints.
Measure Tension:
Observe the sag (e.g., a sag of 20-30mm in the middle is within a reasonable range).
Use a tension meter to check (e.g., within ±10% of the standard value).
Synchronous Adjustment: Tighten or loosen both sides simultaneously to avoid excessive tension on one side causing misalignment.
3. Precautions
Minimum Tension Point: The tensioning device should be close to the drive roller to prevent slippage during startup.
Stroke Control: The difference between the total length of the conveyor belt and the distance between the roller centers should be within 5-5mm.
Trial Run Verification: After adjustment, run the conveyor empty for 10 minutes and check for slippage or vibration.
4. Troubleshooting Common Problems
Uneven Tension: Prioritize checking the parallelism of the idler rollers or belt wear.
Dynamic Fluctuation: Tension under heavy load needs to be 15%-20% higher than under no load.
