What is the reason for the loud noise of screw compressors

There may be many reasons for high noise from screw compressors. Here are some common reasons:

1. Mechanical vibration and noise:
   • Main machine bearings are damaged or excessively worn, which will lead to unbalanced rotation, resulting in noise.
   • The coupling may be loose or damaged, which can also cause vibration and noise.
   • The motor and compressor are poorly aligned, that is, the axis of the motor and the compressor are not in the same straight line, which will lead to instability and noise during operation.
2. Fluid-induced noise:
   • Air flow noise, including eddy current noise formed during inhalation and exhaust, jet noise generated by reflux and expansion, etc.
   • Oil flow noise, such as oil injection noise, oil flow pipeline noise, etc.
3. Electrical Noise:
   • For open screw compressors, the motor itself produces noise, including ventilation noise, mechanical noise, and electromagnetic noise.
4. Noise in unit and other components: Vibration and noise in external structures such as housing, support structure, base, etc.
5. Other components in the unit, such as oil separators, evaporators, cooling systems, etc., may also produce vibration and noise.
6. Improper maintenance or aging of equipment:
   • In a screw compressor that runs for a long time, the housing panel may loosen due to vibration, and the sound insulation cotton may age and damage, which will cause noise leakage.
   • Looseness of each connecting component will also cause vibration and noise during the unit operation.

In response to the problem of high noise from screw compressors, corresponding measures can be taken, such as checking and replacing worn parts, strengthening equipment fixing, adjusting equipment operating parameters, etc. to reduce unnecessary vibration and noise. In addition, regular maintenance and inspections are also important measures to prevent noise problems.