1. Abnormal Operating Status Monitoring
Vibration and Noise
If the equipment's vibration exceeds 0.8 mm/s (low-frequency vibration may indicate bearing damage or foundation settlement) or if a metallic clashing or continuous grinding sound is heard, the drive system should be checked immediately.
Abnormal humming may be caused by motor failure or rotor imbalance; the vibration level should be checked (normally, it should be <0.15 mm/s).
Temperature Abnormality
If the bearing or motor temperature exceeds the ambient temperature +70°C, the lubrication or cooling system should be checked.
Local temperature differences >50°C in the cylinder may indicate insulation failure and require infrared thermal imaging.
2. Changes in Performance Parameters
Decreased Drying Efficiency
A decrease in hot air flow >30% may indicate heat exchange tube blockage and requires ultrasonic flow meter testing.
If the thermal efficiency is less than 75% (fuel-fired) or 85% (steam-fired), the heat exchange system should be checked. Abnormal Energy Consumption
If current fluctuations exceed ±5% of the rated value, check the electrical system or transmission load.
III. Key Component Inspection
Transmission System
Belt tension deviation > ±15% or gear backlash > 0.35mm requires adjustment or replacement.
Bearing radial clearance exceeding the standard (e.g., > 0.11mm for SKF 6314 bearings) requires replacement.
Seals and Leakage
Shaft end leakage > 1×10⁻⁶Pa·m³/s requires replacement of the sealing ring.
Cylinder flange parallelism deviation > 0.15mm/m requires reprocessing of the sealing surface.
IV. Intelligent Early Warning System
Deploy a vibration sensor and temperature transmitter, set vibration thresholds (0.5mm/s) and temperature thresholds (120°C), and achieve a fault warning response time of < 5 minutes.
Maintenance Recommendations
Daily Inspection: Check the filter, belt, and lubrication status weekly. Regular Calibration: Check the temperature sensor, pressure gauge, and safety interlock every six months.
Preventive Maintenance: Replace bearings or seals every 2,000 hours (based on vibration energy distribution).
