I. Daily Maintenance (Per Shift/Daily)
1. Clean the Surface: After stopping the machine, remove dust, debris, and residual material from the conveyor belt surface to prevent accumulation that could lead to misalignment or wear.
2. Check Operating Status: Observe for any abnormal phenomena such as slippage, misalignment, or unusual noises, and address any potential problems promptly.
3. Visually Inspect Key Components: Check whether the rollers and idlers rotate freely, whether the joints are unglued or disengaged, and whether the scraper blades of the sweeper are in the correct position.
II. Weekly Maintenance
1. Thorough Cleaning: Wipe the belt surface with a soft brush and neutral detergent, avoiding the use of corrosive solvents; allow it to air dry naturally after cleaning to prevent moisture and mold.
2. Check the Tensioning Device: Confirm that the tension is appropriate. This can be tested using the "thumb pressing method": Press the middle of the belt; an indentation of 5-8mm is ideal.
3. Inspect Idler Rollers and Drums
Replace any stuck, unevenly worn, or non-rotating idler rollers (replace if runout > 1mm). Clean any adhering substances from the drum surface to prevent uneven diameter from causing misalignment.
III. Monthly Maintenance
1. Lubricate Transmission Components
Apply high-temperature lithium-based grease (NSF H1 grade safety grease is required for the food industry) to moving parts such as bearings, chains, and guide rails. The grease level should be 1/3 to 1/2 of the bearing cavity to avoid excessive dust accumulation.
2. Check the Electrical System
Test the emergency stop button and pull-cord switch to ensure they function effectively and stop the machine within 0.5 seconds. Check for damage to cable insulation and loose terminal blocks.
3. Calibrate Alignment
Check that the drive drum and driven drum are parallel, with an alignment error ≤ 0.05mm, to prevent edge damage caused by long-term misalignment.
IV. Quarterly/Annual Maintenance
1. Replace Wear Parts
Scrapers, Guide Strips: Replace when wear > 3mm
Bearings: Replace after 8000~12000 hours of operation
Conveyor Belt: Must be replaced when surface rubber wear > 50% or the skeleton layer is exposed
2. Preventive Maintenance
Check thermal expansion margin in high-temperature environments (allow 1.5% expansion space); replace with cold-resistant lubricating oil (e.g., -30℃ synthetic hydrocarbon oil) in low-temperature environments.
3. Establish a Maintenance Log
Record the details of each maintenance, replaced parts, and any abnormal phenomena to facilitate tracking equipment status and predicting failures.
