Contents and frequency requirements for regular inspections and maintenance of high and low voltage motors

1. Regular lubrication: The electrical maintenance workshop maintains a ledger for the regular lubrication of motor bearings, assigns a dedicated person to oversee this process, develops a lubrication schedule, carries out oiling and lubrication on a regular basis as specified, and keeps corresponding records. The mechanical department will conduct regular inspections and evaluations. 2. Regular maintenance: The electrical maintenance workshop maintains a register for regular maintenance, categorizes the motors in the entire factory, formulates maintenance plans indicating the time of the last maintenance and the time for the next one, updates this information promptly, marks those that require maintenance either already due or within the next month, and submits a copy to the Mechanical Department for archiving. Power outages for maintenance are carried out based on production conditions; if necessary, the Operations Department coordinates such power outages to ensure coordinated maintenance work. Polar motors last 8,000 hours, four-pole motors last 16,000 hours, six-pole motors last 24,000 hours, and eight-pole motors last 32,000 hours. The maintenance tasks are as follows: 1) Disassembly, cleaning, and washing of the motor to remove dust and dirt from both the inside and outside of the motor. 2) Inspect the rotor and stator coils; test for insulation. 3) Address any loose coils and slot wedges, as well as any loose fastening components. Perform winding binding and reinforcement. 4) Those with inadequate insulation should be dried and treated with varnish. 5) Check whether the wiring screws and terminal studs on the wiring board are loose or burned, and whether the wires show signs of aging or cracking; if any of these issues exist, they must be replaced. 6) Replace the bearing and refuel it. 7) Check the fan and replace it if necessary. 8) Assembly (including replacing faulty screws). 9) Painting or repainting. 10) Perform inspections and measurements on the motor before testing it. 11) Test the motor under no-load conditions, conducting inspections of the motor when it is operating without a load. If any abnormal phenomena occur in the motor during the maintenance period, maintenance must be carried out in advance as necessary. When replacing bearings, it is necessary to carefully inspect their quality, follow the \"Bearing Assembly Standards\" strictly, and use lubricant of the same brand.

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