Air compressor maintenance cycle is usually divided daily, monthly, quarterly, yearly four stages, the specific maintenance frequency and items need to be combined with equipment type, operating environment and use intensity of comprehensive judgment, the following is a detailed description:
daily maintenance of 1. (basic inspection)
- check oil level: Ensure that the oil level is between 1/2 and 2/3 of the oil level mirror to avoid insufficient lubrication or abnormal oil temperature caused by too low oil level.
- Check air filter element and coolant level: If the air filter is blocked or the coolant is insufficient, it should be replaced or supplemented in time to prevent the efficiency of the equipment from decreasing.
- Check for leaks: Use soapy water or leak detector to check whether the hose and pipe joints are leaking to avoid compressed air waste or safety hazards.
- Check consumable parts: If the pressure difference of the separator reaches more than 0.6 bar (limit 1 bar) or the pressure difference starts to decrease, stop the machine and replace the separation core to prevent water from entering the system.
- Check the exhaust temperature of the main engine: If the temperature is close to the warning value, the oil cooler should be cleaned to prevent the equipment from overheating and damage.
2. monthly maintenance (deep cleaning and fastening)
- cleaning the cooler: Use compressed air or cleaning agent to clean up the dust on the surface of the cooler to ensure heat dissipation efficiency. If the environment is dusty, the cleaning cycle should be shortened.
- Check wire connection: Tighten all wire connectors to prevent electrical failure caused by poor contact.
- Inspect AC contactor contacts: Sand the oxide layer on the surface of the contact with sandpaper to ensure good contact.
- Clean the motor suction port: Wipe the dust on the suction port of the motor and the surface of the housing with a dry cloth to prevent the motor from overheating.
- Clean the return oil filter: Remove the oil return filter, soak it with cleaning agent and rinse it to prevent the oil circuit from being blocked.
- Check setting and running consistency: Check whether the parameters such as pressure and temperature of the air compressor are consistent with the set value, and adjust the deviation in time.
3. quarterly maintenance (critical parts replacement)
- clean the main motor and fan motor: Purge the dust inside the motor with compressed air, check the lubrication of the motor bearing, and add grease if necessary.
- Replace the oil filter element: If the differential pressure switch of the oil filter element acts or the timer is reset to zero, replace the new filter element to prevent the oil circuit from being blocked.
- Check minimum pressure valves and relief valves: Manually lift the valve stem of the safety valve to confirm that it can exhaust normally; it is required to send for inspection every year to calibrate the set pressure value.
- Check sensor: Use a multimeter to detect whether the output signal of the sensor is accurate, and replace the faulty sensor in time.
4. annual maintenance (complete overhaul and replacement)
- replace lubricating oil and oil-gas separator filter element: Drain the old oil, clean the oil circuit, and add new oil to the specified oil level; if the pressure difference of the oil-gas separator exceeds 0.12 MPa, a new filter element needs to be replaced.
- Replace air filter element and oil filter: If the environment is dusty or the air humidity is high, the replacement cycle should be shortened.
- Calibrated safety valve: Send a professional organization to calibrate the pressure setting value of the safety valve to ensure the safe operation of the equipment.
- Check flexible coupling and cooling fan: Check the wear of the coupling and replace it if necessary; clean the cooling fan blades to ensure the heat dissipation efficiency.
- Cleaning the automatic blowdown valve: Remove the drain valve and rinse it after soaking with cleaning agent to prevent blockage.
- Replenish or replace motor grease: Grease shall be added to the motor bearing for 1500-2000 hours, and the bearing temperature shall not exceed 120 ℃.
5. maintenance adjustment under special circumstances
- when the use environment is bad: If the air compressor is installed in a high temperature, high humidity or dusty environment, the maintenance period should be shortened. For example, an air filter cartridge may need to be replaced every 1500 hours.
- During discontinuous operation: If the air compressor runs intermittently, the maintenance period shall be adjusted according to the actual running time. For example, an oil filter may need to be replaced every 1500 hours.
- When sealing equipment: Long-term sealed air compressors need to be replaced every 2 years to prevent oil deterioration.
