Screw air compressor loud sound

Screw air compressors are a common problem, which can be caused by a variety of reasons. The following are some possible reasons and corresponding solutions:

Cause Analysis

1. Air flow pulsation:
   • When the screw air compressor is working, the intake valve and exhaust valve switches cooperate with each other, resulting in the exhaust being pulsating, thereby generating excitation noise. The more violent the airflow pulses, the more noise it is.
2. Mechanical vibration:
   • High motor speed may cause vibration in the body, thereby generating noise. In addition, if the foundation is not firm during installation or the anchor bolts are loose, it can also lead to increased vibration and noise.
3. Parts worn or damaged:
   • Internal components of air compressors such as yin and yang rotors, bearings, etc. may wear after long-term use, causing the components to collide and cause noise. At the same time, if the belt is too loose or the main and passive belt grooves are too large to cause slippage, it will also cause a whistling sound.
4. Insufficient oil supply or oil product problems:
   • Poor lubrication of the air compressor causes dry friction and may cause noise. In addition, if the oil level is too low, the oil deteriorates or the model is inappropriate, it will also affect the lubrication effect, resulting in increased friction between parts and noise.
5. Broken sound silence system:
   • If the sound silence system of a screw compressor is damaged, it will also lead to increased noise.

Solve the problem of airflow pulsation:

• Add buffer devices, such as orifices, venturi tubes, buffer tanks, etc., to reduce airflow pulsation and noise.

• Solve mechanical vibration problems:
  • Add a pipe card in the appropriate position of the pipe to fix the pipe and reduce vibration.
  • Check whether the installation foundation of the air compressor is solid. If there is loose or sinking, the foundation should be strengthened and the anchor bolts should be tightened.
• Inspecting and replacing worn parts:
  • Let professional maintenance personnel check the wear of the Yin and Yang rotors, bearings and other components. If there are severe wear or damaged parts, they should be replaced in time.
  • Adjust the loose beltTightness ensures that the belt does not slip and makes a whistling sound.
• Ensure normal oil supply:
  • Check whether the oil level is within the normal range. If it is too low, add appropriate special oil for air compressors in time.
  • Replace the oil filter regularly and handle the faulty areas to ensure the normal operation of the lubrication system.
• Inspect and repair the silence system:
  • Check whether the main body of the silence system is intact and whether the connecting bolts are loose. If there is any damage or looseness, it should be repaired or replaced in time.
• Use sound insulation measures:
  • For small and medium-sized air compressors, a detachable and assembled structural sound insulation cover can be used for overall sound insulation.
  • For large air compressor units, independent sound insulation rooms can be set up, and their room enclosures, doors and windows are all made of sound insulation structural materials.
• Consider buying a variable frequency air compressor:
  • Inverter air compressors can save electricity bills while reducing noise, which is an option worth considering.
• Installing mufflers:
  • Installing appropriate mufflers at the inlet and exhaust ports of the air compressor can further reduce noise.

Through the above measures, the noise level of the screw air compressor can be effectively reduced, and the working environment and employee comfort can be improved. If noise problems persist, it is recommended to contact a professional air compressor repair staff for further inspection and repair.