Sep 12, 2025
I. Typical Signs of Lubrication System Failure
1. Abnormal Oil Pressure
Low oil pressure: This may be caused by insufficient oil, a faulty oil pump, or an oil line blockage (such as a clogged filter).
Excessive oil pressure: This is usually caused by excessive oil viscosity or a malfunctioning oil control valve.
2. Abnormal Temperature
Bearing temperatures exceeding 85°C or main motor winding temperatures exceeding 120°C trigger a safety interlock trip. Abnormal skid temperatures require checking cooling water flow and heat dissipation channels for blockage.
3. Signs of Lubrication Failure
Abnormal bearing noise (such as metallic friction) or increased vibration indicates oil film rupture or insufficient lubrication. Deteriorated oil quality (emulsification or the presence of metal particles) requires immediate oil replacement.
II. Fault Diagnosis Methods
1. Contact Resistance Test: The oil film condition is determined by measuring the resistance of the bearing's inner and outer races. Lower resistance indicates spalling or corrosion.
2. Fiber Optic Monitoring Technology
Directly extract the bearing ring surface signal and analyze the displacement sensor data to identify anomalies.
3. Pressure Detection Method
Monitor changes in system pressure parameters; abnormal fluctuations may indicate a lubrication failure.
III. Operational Troubleshooting Procedure
1. Signal Check
Prioritize the response signal and fault alarm of the oil station low-pressure pump on the central control panel.
2. Mechanical Inspection
Confirm bearing clearance (standard 0.5-1.2mm) and coupling coaxiality.
Check seals for aging that could lead to dust/moisture intrusion.
3. Oil Analysis
Regularly test lubricant viscosity, water content, and contamination (sampling every 500 hours is recommended).
IV. Preventive Measures
Change lubricant every 2000 hours (reduced to 1500 hours in dusty environments).
Use non-contact sealing + oil-air lubrication to extend bearing life.
Preheat lubricant to above 20°C before starting in winter.
