Screw and scroll air compressor which noise is big?
The noise of scroll air compressor is usually lower than that of screw air compressor the main reasons are as follows:
1. Structural differences
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scroll air compressor:
compression is realized by the meshing motion of the two scrolls, the structure is compact, the parts are few, and the dynamic balance design is better. The compression process is continuous and the airflow pulsation is small, and the vibration and noise are naturally low. -
Screw air compressor:
rely on a pair of screw meshing rotating compressed gas, need lubricating oil auxiliary seal. The structure is complex (including bearings, gears, etc.), mechanical vibration and airflow pulsation are more obvious during high-speed operation, and the noise is relatively high.
2. Comparison of noise sources
| type of noise | scroll air compressor | screw air compressor |
|---|---|---|
| mechanical vibration | low (dynamic balance design) | higher (multiple moving parts) |
| airflow pulsation | small (continuous compression) | larger (intermittent exhaust) |
| noise of lubrication system | no oil or little lubrication (low noise) | need oil pump or oil mist (may produce oil flow sound) |
| overall noise level | 65-75 dB(A)(Similar to normal conversation) | 75-85 dB(A)(approaching truck noise) |
3. Actual influencing factors
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brand and Design: Some screw machines optimize noise through sound-proof covers and shock-absorbing pads, which may be close to the level of scroll machines.
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Maintenance Status: If the screw machine is insufficiently lubricated or the bearing is worn, the noise will increase significantly; the scroll machine has a simple structure and maintenance has little effect on the noise.
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frequency conversion technology: The frequency conversion screw machine can reduce noise by reducing the speed, but the traditional constant speed model has higher noise.
4. Application Scenario Recommendations
- vortex air compressor is preferred:
- noise-sensitive environments (e. g., near laboratories, hospitals, offices).
- Small capacity requirements (domestic, commercial air conditioners, small production lines).
- Optional screw air compressor:
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industrial-grade large displacement scenarios, and noise can be controlled through sound insulation measures (e. g. independent machine room).
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Need to adapt to high temperature, high humidity and other harsh conditions (screw machine more durable).
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Summary
under the same capacity and working condition, scroll air compressors are usually quieter it is suitable for scenes with strict noise requirements; although the screw air compressor has high noise, it can be improved through design and external measures, and is more suitable for large-capacity, high-pressure industrial applications. The actual choice needs to be combined with specific needs, budget and environmental constraints.
