What is the shutdown of the air compressor?

Air compressor failure shutdown may be caused by a variety of reasons, the following from mechanical, electrical, thermal management, pressure control four categories to analyze, and provide diagnosis and solution ideas:

common fault causes and phenomena of 1.

1. Mechanical failure

• phenomenon: Shut down after abnormal noise and severe vibration of the main engine.
• Reason:
  • bearing/screw wear: Insufficient lubricating oil or impurities cause lubrication failure.
  • Piston stuck: foreign matter enters the cylinder or the piston ring is worn.
• Diagnosis: Dismantling inspection found that metal chips and lubricating oil turned black.

2. Electrical fault

• phenomenon: Control panel alarm, motor overheat shutdown.
• Reason:
  • winding short circuit: motor insulation aging or overload.
  • Controller failure: circuit board damp or component damage.
• Diagnosis: The multimeter detects abnormal winding resistance, and the control screen displays an error code.

3. Thermal management failure

• phenomenon: Automatic shutdown after exhaust temperature> 105 ℃.
• Reason:
  • cooler blockage: The accumulation of dust and dirt leads to a decrease in heat dissipation efficiency.
  • Oil deterioration: lubricating oil emulsification or coking, lubricating performance decline.
• Diagnosis: Infrared thermometer detects abnormal oil temperature/exhaust temperature.

4. Abnormal pressure control

• phenomenon: The pressure relay stops frequently.
• Reason:
  • air leakage: the seal is aged or the pipe joint is loose.
  • Pressure setting error: sensor drift or controller parameter error.
• Diagnosis apply soapy water to detect the air leakage point and calibrate the pressure gauge.

2. rapid processing flow

1. emergency Response
   • disconnect the power supply to avoid secondary damage.
   • Record fault code/pre-shutdown pressure/temperature data.
2. Grading investigation
   • primary Inspection:
     • supply voltage (deviation shall be <± 5%).
     • Lubricating oil quantity (1/3-2/3 of oil level mirror).
     • Air filter (pressure difference> 0.05MPa to be replaced).
   • Depth diagnosis:
     • motor insulation test (resistance> 1MΩ is normal).
     • Infrared thermal imaging detects the temperature distribution.
     • Vibration spectrum analysis (bearing failure frequency> 1kHz).
3. Recovery measures
   • temporary recovery:
     • clean the cooler (compressed air blowback or water washing).
     • Change the lubricating oil (drain the old oil completely).
   • Permanent Repair:
     • replace worn parts (bearings/studs/seals).
     • Upgrade the cooling system (add cooling fan or water cooling kit).

3. prevention strategy

• oil Management regularly check the acid value (should be <2mgKOH/g), viscosity (deviation <10%).
• intelligent monitoring: Install the vibration sensor and temperature sensor, and set the warning threshold to 1.2 times the normal operating value.
• Environment adaptation: Pre-filtration device is installed in dust environment (filtration accuracy ≤ 1μm).

Typical lessons: A factory neglected to replace lubricating oil (3000 hours overdue), resulting in coking and blocking of the main engine, and the maintenance cost reached 45% of the equipment value. It is recommended to develop Air Compressor Health File to record the change trend of key parameters and realize preventive maintenance.