HOW TO MAINTAIN THE MAIN COMPONENTS OF SCREW AIR COMPRESSOR?

For screw compressors, it is particularly important to regularly inspect and maintain the main components. Solving small problems in a timely manner can prevent them from becoming major problems. Maintaining the main components of screw compressors is the key to ensuring efficient and stable operation of the equipment.

1. Screw rotor

Cleaning and lubrication: Check the rotor surface regularly for carbon deposits and oil stains to avoid wear. Check the bearing wear every 8000-10000 hours of operation and replace if necessary.Check the oil level and quality regularly, and replace it periodically (usually every 2000-4000 hours). Use special oil for air compressors to prevent oil deterioration from affecting the lubrication effect.

Clearance check: After long-term operation, the rotor clearance may become larger, resulting in reduced compression efficiency. Replace the bearings or adjust the components if necessary. Monitor the operating sound. Abnormal noise may indicate bearing wear or rotor damage. Check the vibration. Abnormal vibration requires shutdown for investigation.

2. Oil-gas separator

Replacement cycle: Generally, it is replaced every 3000-6000 hours. If the exhaust oil content is abnormal (such as oil stains), it needs to be replaced in advance to prevent oil failure, increased fuel consumption or compressed air pollution. Ensure good sealing during installation to avoid leakage of oil-gas mixture.

Pressure difference monitoring: Pay attention to the pressure difference before and after the oil-gas separator. If it exceeds the set value (such as 0.8-1bar), replace it in time to avoid affecting the operating efficiency of the unit.

3. Air filter

Regular cleaning/replacement: Clean the filter element every 500-1000 hours, and use compressed air to blow away dust from the inside out; if the filter element is damaged or seriously blocked (such as excessive intake resistance), it needs to be replaced in time to prevent dust from entering the main engine and wearing out the rotor. When the pressure difference alarm sounds, handle it immediately to avoid increased intake resistance and increased energy consumption.

4. Lubricating oil system

Oil cooler: Clean the dust and scale on the cooler surface regularly (special cleaning agent can be used) to ensure the heat dissipation effect and prevent the oil from being oxidized due to excessive oil temperature.

Oil filter: Replace the oil filter every 1000-2000 hours to prevent impurities from entering the main engine and clogging the oil circuit.

5. Intake valve and solenoid valve

Action inspection: Regularly test whether the intake valve switch is flexible, whether the solenoid valve coil is abnormally heated, and remove carbon deposits or oil stains in the valve to prevent the valve from getting stuck and affecting the intake volume.

6. Transmission system

Motor maintenance: Check the insulation resistance of the motor winding, clean the dust regularly, and add or replace the grease of the bearing according to the instructions (usually every 1-2 years).

Belt: Check the belt wear and tightness, and multiple belts need to be replaced at the same time. Avoid over-tightening (increasing the bearing load) or over-loosening (slipping)

Coupling alignment: Ensure that the coupling is not loose or offset, and avoid excessive vibration during operation to damage the components.

7. Cooling system

Air cooling type: regularly clean the debris from the fan blades and radiator fins to ensure smooth ventilation;

Water cooling type: check the cooling water flow and water quality to avoid scaling, and clean the cooling water pipeline at least once a year.

Daily precautions

Pay attention to the unit's pressure, temperature, current and other parameters during operation, and stop the machine for inspection in time if any abnormality is found;

Discharge the condensed water in the gas tank and oil circuit after shutdown to prevent rust;

Keep maintenance records and formulate maintenance plans according to the manufacturer's instructions.

The above measures can extend the life of parts, reduce energy consumption, reduce downtime due to failures, and ensure efficient operation of the air compressor. Adjust the cycle according to the actual working conditions. The maintenance interval needs to be shortened in dusty and high-temperature environments.

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