Screw air compressor noise how many decibels

The noise level of screw air compressor (referred to as screw air compressor) varies depending on the model, power and operating conditions. The following is based on industry data and technical information to analyze the noise problem of screw air compressor in detail:

1. the noise level of screw air compressor

1. typical Noise Range:
   • small screw air compressor(e. g. 7.5KW): The noise is about 60-65 dB(Close to the sound level of daily conversation).
   • Medium screw air compressor(e. g. 37KW): Noise is usually 65-75 dB between.
   • Large screw air compressor(e. g. 315KW): Noise may reach 85-90 dB(similar to the sound of a car horn).
2. Compared to other models:
   • piston air compressor noise is generally more than 75 decibels significantly higher than the screw machine.
   • Oil-free single screw air compressor: By optimizing the structural design, the noise can be as low 60 decibels it is suitable for scenes with high mute requirements.

2. Noise Measurement Standard

1. units and instruments:
   • noise decibels (dB) units, usually adopted sound level A(reflecting the human ear's perception of noise) to measure.
   • Use precision sound level meter or noise analyzer professional testing.
2. Industry Standard:
   • according to the Noise Testing Standard for Mechanical Equipment, the noise limit of screw air compressor is usually 75-85 dB(depending on power and use).
   • Some strict scenes (such as indoor use) require noise less 70 decibels.

3. Factors Affecting Noise

1. mechanical structure:
   • twin screw air compressor: The movement of the two rotors may produce vibration, and the noise is slightly higher than that of the single screw model.
   • Bearing and Lubrication: Insufficient lubrication or bearing wear will increase friction noise.
2. Operating condition:
   • load change: Noise may rise 2-5 decibels at high load.
   • Ambient temperature: The cooling fan speed increases in high temperature environment, resulting in increased noise.
3. Installation and Maintenance:
   • foundation fixed: Equipment not firmly installed may cause vibration noise.
   • pipeline resonance: Air flow pulsation and pipe resonance will amplify noise.

4. noise control method

1. equipment optimization:
   • select low noise models: such as oil-free single screw air compressor or permanent magnet frequency conversion screw machine.
   • Add sound insulation cover: The equipment is wrapped with sound-absorbing materials, which can reduce noise by 5-10 decibels.
2. Installation measures:
   • muffler: Install an impedance composite muffler at the intake/exhaust port to reduce airflow noise.
   • Shock-absorbing base: Use rubber pads or spring shock absorbers to reduce vibration transmission.
3. Environment Layout:
   • independent machine room: Place the air compressor in the soundproof machine room with ventilation and silencing design.
   • Distance control: Ensure that the equipment is far away from the office area and use the distance to attenuate the noise (for every 1 times the distance, the noise is attenuated by 6 decibels).

5. Summary

the noise level of the screw air compressor is usually 60-90 decibels, depending on the model and working conditions. By optimizing the selection, installation measures and environmental layout, noise interference can be effectively reduced. If you need noise control for a specific scene, it is recommended that:

1. consulting equipment suppliers obtain noise data for a specific model.
2. Professional Acoustic Design: Sound insulation optimization for plant layout.