Detailed operation of Rolling Mill Motor maintenance

I. Daily inspection
1. Before starting the machine every day, check the appearance of the motor to see if there is obvious damage, cracks or oil leakage.
2. Listen to the sound of the motor when it is running to see if there is any abnormal noise, such as friction, impact or sharp noise.
3. Touch the motor housing with your hand to feel whether the temperature rises abnormally. If it is obviously overheated, stop the machine immediately for inspection.
II. Regular cleaning
1. Every other week, use dry compressed air to remove dust and debris from the surface and vents of the motor.
2. For stubborn dirt, use a soft damp cloth to wipe gently, but make sure that the motor is powered off and completely dry before cleaning.
III. Wiring inspection
1. Check the motor terminals once a month to ensure that the wiring is firm and there is no sign of looseness, oxidation or overheating.
2. Check whether the insulation layer of the power cord and control wire is intact. If it is damaged, it should be replaced in time.
IV. Bearing maintenance
1. Check the lubrication of the motor bearings every three months.
2. For grease-lubricated bearings, if the grease changes color, dries up or contains impurities, the old grease should be cleaned and an appropriate amount of new grease should be added.
3. For oil-lubricated bearings, check the oil level and oil quality, and replace the lubricating oil if necessary.
4. At the same time, judge whether the bearing is operating normally by listening to the sound, touching the vibration, etc. If there is any abnormality, it should be replaced in time.
V. Fan and cooling system inspection
1. Check whether the motor fan is operating normally and whether the blades are damaged or deformed every quarter.
2. Clean the dust and debris on the fan cover to ensure good ventilation.
3. Check whether the cooling duct is unobstructed and whether there is any blockage or leakage.
VI. Insulation test
1. Perform an insulation resistance test on the motor once every six months, and use a megohmmeter to measure the insulation resistance of the winding to the ground and between phases.
2. Generally speaking, the insulation resistance should not be lower than the specified value (usually megohm level), otherwise the motor needs to be dried or repaired.
3. After the test is completed, the motor is fully discharged to prevent the residual charge from causing danger.
VII. Regular maintenance
1. Arrange a comprehensive maintenance once a year, including disassembling the motor and checking the condition of the stator and rotor windings.
2. Check whether the winding has insulation damage, short circuit, open circuit and other faults.
3. Clean the dust and oil on the stator and rotor cores.
4. Check the wear of the brushes and replace the severely worn brushes in time.
5. Check and maintain the mechanical parts of the motor, such as shafts, keys, end covers, etc., to ensure that they are not damaged or loose.
VIII. Maintenance records and archives
1. After each maintenance, record the maintenance content, problems found, treatment methods, and replaced parts in detail.
2. Organize and archive the maintenance records for subsequent review and analysis of the motor's operating status and maintenance history.