Screw air compressor maintenance method

The maintenance method of screw air compressors directly affects their operating efficiency and service life. The following is a systematic introduction to the maintenance process from five aspects: maintenance cycle, key steps, tools and materials, personnel requirements and precautions:

1. Maintenance cycle and core steps

1. daily examinations

• Oil level confirmation: Ensure that the lubricating oil is in the center line position of the oil level mirror, and replenish special lubricating oil if it is insufficient.
• temperature monitoring: Check the exhaust temperature (normal ≤98℃). If it is close, clean the oil cooler.
• condensate drain: Open the drain valve before starting the machine to drain all the condensed water in the air storage tank to prevent corrosion.

2. weekly maintenance

• leak check: Check whether the pipes and joints leak, and whether the safety valve is reliable.
• belt tension: Visually adjust the belt tightness (press the belt deflection by about 10mm).
• Filter element cleaning: Use low-pressure air to blow the dust on the air filter element from the inside out.

3. Regular maintenance (every 2000 hours)

• Lubricating oil replacement: Completely drain old oil and replace special lubricating oil of the same brand.
• filter replacement: Air filter elements, oil filter elements, and oil and gas separator filter elements all need to be replaced.
• Cooler cleaning: Use special cleaning agent to clean up dirt on the cooler surface to improve heat dissipation efficiency.

2. Maintenance tools and materials

1. indispensable tool

• Allen key: Used to remove high temperature components (operation after cooling).
• oil cleaning agent: Clean oil tanks, filter elements and other components.
• Dust-free cloth/tissue: Wipe internal oil stains to avoid residue.
• Oil filter wrench: Remove the filter element with a special tool to prevent slipping.

2. Consumables selection

• lubricating oil: Special oil for screw compressors with the designated brand of equipment must be used, and mixing it is strictly prohibited.
• Filter element set: Choose an original factory or certified brand to ensure filtration accuracy and sealing.

3. Skills requirements for maintenance personnel

1. qualification requirements

• You must hold a pressure vessel operation certificate or manufacturer training certification and be familiar with the equipment structure.

2. core skills

• failure judgment: Can quickly locate problems through parameters such as abnormal noise and temperature abnormalities.
• standard operation: Strictly follow the shutdown, power outage, and pressure relief procedures to avoid safety accidents.
• data records: After maintenance, you need to record the lubricant brand, filter element number, maintenance time, etc.

4. Matters needing attention

1. safety Code

• Before maintenance, the power supply must be disconnected to confirm that there is no pressure inside the equipment (observe the pressure gauge to return to zero).
• High-temperature parts need to be cooled to room temperature before being disassembled to prevent burns.

2. environmental requirements

• Maintenance must be carried out in a dry, dust-free environment to prevent foreign matter from entering the compressor.

3. special scene

• long-term shutdown: It needs to be started once a month and run for 10-15 minutes to prevent emulsification of lubricating oil.
• severe working conditions: If there is a lot of dust in the environment, the filter element replacement cycle needs to be shortened (such as every 1000 hours).

5. Market trends and technology upgrades

1. intelligent monitoring

• Some high-end air compressors are equipped with IoT sensors that can remotely monitor oil quality and filter life, and automatically generate maintenance plans.

2. Extended maintenance technology

• Using a combination of synthetic lubricating oil + nano filter element, the maintenance cycle can be extended to 4000 hours.

3. Quick maintenance kit

• Manufacturers provide integrated maintenance packages (oil, filter elements, tools) to simplify the operating process.

conclusion

The maintenance of screw air compressors needs to be combined with daily inspection and regular maintenance to ensure that “three points of use and seven points of maintenance”. By standardizing operation and using original consumables, equipment stability can be significantly improved and service life can be extended. It is recommended that companies formulate maintenance ledgers and regularly train operators to adapt to new needs brought about by technological upgrades.