Screw air compressor with loud sound

Screw type air compressor sound is a common problem, which may be caused by a variety of reasons. Here are some possible causes and solutions:

cause analysis

1. airflow pulsation:

   • when the screw air compressor is working, the intake valve and the exhaust valve switch cooperate with each other, resulting in pulsating exhaust, resulting in excitation noise. The more intense the airflow pulsation, the greater the noise.

2. Mechanical vibration:

   • the high speed of the motor may cause vibration of the machine body, which in turn generates noise. In addition, if the foundation is not firm or the anchor bolts are loose when the air compressor is installed, it will also cause increased vibration and noise.

3. Parts worn or damaged:

   • the internal parts of the air compressor, such as the yin and yang rotors, bearings, etc., may be worn after long-term use, causing the parts to collide with each other to produce noise. At the same time, if the belt is too loose or the main and passive belt groove fit is too large to cause slippage, howling will also occur.

4. Insufficient oil supply or oil problem:

   • poor internal lubrication of the air compressor leads to dry friction and noise. In addition, if the oil level is too low, the oil is deteriorated or the model is inappropriate, it will also affect the lubrication effect, resulting in increased friction and noise.

5. Damaged silencer system:

   • if the silencer system of the screw compressor is damaged, it will also cause the noise to increase.

Solution

1. solving the problem of airflow pulsation:

   • buffer devices, such as orifice plates, venturi tubes, buffer tanks, etc., are added to reduce airflow pulsation and noise.

2. Solving mechanical vibration problems:

   • the pipe clip shall be added at the appropriate position of the pipe to fix the pipe and reduce vibration.
   • Check whether the installation foundation of the air compressor is firm. If there is looseness or sinking, the foundation should be strengthened and the anchor bolts should be tightened.

3. Repair and replace worn parts:

   • find professional maintenance personnel to check the wear of the male and female rotors, bearings and other parts. If there are severely worn or damaged parts, they should be replaced in time.
   • Adjust the tightness of the belt to ensure that the belt will not slip and cause howling.

4. Make sure the fuel supply is normal.:

   • check whether the oil level is in the normal range. If it is too low, add suitable special oil for air compressor in time.
   • Regularly replace the oil filter and deal with the faulty parts to ensure the normal operation of the lubrication system.

5. Check and repair silencing system:

   • check whether the main body of the silencer system is in good condition and whether the connecting bolts are loose. If there is any damage or looseness, it should be repaired or replaced in time.

6. Adopt sound insulation measures:

   • for small and medium-sized air compressors, a detachable 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 the room envelope, doors and windows are all made of sound insulation structural materials.

7. Consider buying a variable frequency air compressor:

   • the variable frequency air compressor can save electricity while reducing noise, which is a choice worth considering.

8. Installing muffler:

   • in the air compressor inlet and outlet to install the appropriate muffler, can further reduce the noise.

Through the above measures, the noise level of the screw air compressor can be effectively reduced, and the working environment and the comfort of employees can be improved. If the noise problem still exists, it is recommended to contact professional air compressor maintenance personnel for further inspection and maintenance.