Screw conveyors are commonly used in industrial production, and their lifespan directly impacts production efficiency and maintenance costs. Proper lubrication, cleaning, and routine maintenance can extend equipment life by 30%-50% and reduce unexpected failures.
1. Lubrication Management (Core Maintenance Item)
Lubrication Locations and Frequency
|
Lubrication Points |
Lubrication Intervals |
Precautions |
|
Bearings |
Every 500 Hours |
Grease 60%-70% of the bearing cavity. |
|
Gear Reducer |
First 500 hours, then 2000 hours thereafter. |
Maintain the oil level at 1/2 to 2/3 of the sight glass. |
|
Screw Shaft Joints |
Every 300 Hours |
Avoid mixing different brands of grease. |
Common lubrication mistakes:
Overlubrication → causes bearing heating and seal damage
Mixing lubricants → Different brands may react chemically, reducing lubrication effectiveness
Ignoring high-temperature environments → Synthetic grease (temperature resistance > 150°C) is recommended for high-temperature applications
2. Cleanliness management (preventing blockage and wear)
Cleaning methods for different materials
|
Material Type |
Cleaning Method |
Cleaning Frequency |
|
Powdered Materials |
Compressed Air Purging |
End of Each Shift |
|
Viscous Materials |
Warm Water + Neutral Detergent Rinse |
Weekly |
|
Corrosive Materials |
Wash with Special Preservatives and Dry |
Every 3 Days |
Cleaning Precautions
Do not use a high-pressure water gun directly on the bearing housing → This can cause water damage. Material accumulation at the base of the spiral blades → Use a soft-bristled brush to avoid scratches.
Clean immediately after shutting down → Prevent material from hardening and clumping.
3. Daily Inspection and Maintenance (Preventive Maintenance)
Daily Inspection Checklist
Abnormal Noise Detection: Listen for unusual noise from bearings and chains during operation.
Vibration Monitoring: Manually check the motor and reducer for vibrations <4.5 mm/s.
Seal Inspection: Observe the shaft ends for oil or powder leakage.
Belt/Chain Tightness: Press down to ensure sag <10 mm (chain) or <5 mm (belt).
Monthly Deep Maintenance
Inspect the propeller blades for wear: Replace if wear >30%.
Tighten bolts: Use a torque wrench (refer to the equipment manual for standard values).
Leveling: Use a spirit level to check for deviation <2 mm/m.
4.Common Faults and Solutions
|
Symptom |
Possible Cause |
Solution |
|
Bearing overheating |
Insufficient lubrication or contamination |
Clean bearings and replace grease |
|
Decreased conveying efficiency |
Worn blades or material adhesion |
Clean or replace blades |
|
Abnormal vibration |
Bent screw shaft or bearing damage |
Align shaft or replace bearings |
