Maintenance of Oil-Free Water-Lubricated Single-Screw Air Compressors for West Lake

Equipment Overview and Maintenance Significance

Oil-free, water-lubricated single-screw air compressors are widely used in industrial production thanks to their compact design, smooth operation, and environmentally friendly characteristics. These units rely on a dedicated medium to seal and cool the rotor and chamber, completely eliminating the risk of lubricant contamination. Proper maintenance not only extends the service life of core components but also sustains high energy efficiency and reduces the likelihood of unplanned downtime.

Key Metrics for Daily Inspections

Operators must establish standardized inspection procedures, with particular attention to the following parameters:

• Operating Pressure and Temperature:Monitor exhaust pressure in real time to ensure it remains within the set range, and track host temperature and cooling system water temperature changes to prevent over-temperature alarms.
• Medium Level and Purity:Regularly check that the fluid reservoir level is within the specified range, and inspect the fluid or dedicated lubricant for cloudiness, sedimentation, or emulsification.
• Unusual Noises and Vibrations:Use a stethoscope or your senses to determine whether the host unit is operating smoothly, and check anchor bolts and pipe connections for looseness or leaks.
• Electrical and Control Panels:Confirm that voltage and current are balanced, and check whether the fault history log and sensor feedback data are normal.

Regular Maintenance Procedure Specifications

Develop a tiered maintenance schedule based on equipment operating hours to ensure the system’s long-term reliable operation:

• Filter Replacement:The intake filter and the downstream precision filter must be disassembled, cleaned, or replaced periodically to ensure adequate air intake and prevent particulate matter from entering the main unit.
• Seal Assembly Inspection:Focus inspections on the condition of rubber sealing rings, gaskets, and shaft seals; replace any components showing signs of hardening, cracking, or leakage promptly to prevent gas escape or backflow of process media.
• Cooling System Cleaning:Regularly flush plate heat exchangers with water cooling or air-cooled fins to remove scale and dust buildup, restoring heat exchange efficiency.
• Electrical Contact Tightening:While the power is off, inspect the main circuit terminals, contactor contacts, and grounding conductors to eliminate the risk of loose connections and enhance power supply stability.

Common Exception Handling Strategies

When faced with unexpected operating conditions, technicians can follow these steps to quickly identify the issue:

• Exhaust temperature too high:Prioritize checking the cooling water circuit for blockages, verifying the temperature control valve’s operational sensitivity, and assessing the ambient temperature. After clearing any blocked passages, recalibrate the protection thresholds.
• Decreased gas production:This is often caused by increased intake resistance, wear of internal clearances, or valve leakage; the unit must be disassembled to assess rotor clearance and repair the seals.
• Frequent Start-Stop Protection:Check the pressure switch setpoint, the air tank capacity match, and the controller logic parameters to rule out the possibility of sensor false alarms.

Safety Operating Precautions

Maintenance work must strictly adhere to industrial safety regulations. Before performing any maintenance, always disconnect the power supply and hang warning signs, and release any residual pressure in the system. When handling high-temperature components or electrical parts, wear insulated protective equipment. Discarded filter consumables and liquid media should be collected separately and handed over to qualified organizations for compliant disposal to prevent environmental pollution.