Advantages and Disadvantages of Screw Air Compressor

This blog presents Advantages and Disadvantages of Screw Air Compressor:

1. What is screw air compressor?

Screw air compressors are one of the rotary volumetric compressors, in which two rotors with helical gears mesh with each other to compress and discharge the gas.

According to the number of screws, screw air compressor is divided into single-screw and twin-screw air compressor; according to the compression process whether there is lubricant involved, is divided into oil-injected and oil-free screw air compressor, oil-free compressor is divided into dry screw air compressor and water-injected screw air compressor.

In general, the air screw compressor’s structure is simple, less wearing parts, low exhaust temperature, large pressure ratio, especially not afraid of gas compression with liquid or dust. The emergence of oil-injected screw compressors has led to the rapid development of screw compressors (including screw air compressors, screw chillers, etc.) for power process and refrigeration at home and abroad.

2. How does a screw air compressor work?

The screw air compressor utilizes the mutual meshing of the yin and yang screw rotors to continuously generate compressed air by decreasing the volume between the teeth and increasing the pressure of the gas. Screw air compressor also belongs to the volumetric compressor, but due to the working principle of the screw model, when compared with the piston air compressor, the screw air compressor has a stable air supply, and generally does not need to be equipped with air storage tanks.

3. Why should you get a screw air compressor?

There are six clear advantages of screw air compressor:

① High reliability: screw air compressor has fewer parts and less wearing parts, so it runs reliably and has a long service life.

② Convenient operation and maintenance: the operator does not have to go through a long period of professional training, unattended operation can be realized, the operation is relatively simple, according to the need for exhaust gas supply.

③ Good power balance: screw air compressor has no unbalanced inertia force, the machine can work smoothly at high speed, and can realize foundationless operation, especially suitable for mobile compressor, small size, light weight, and occupies less area.

④ Strong adaptability: screw compressor has the characteristics of forced gas transmission, the exhaust volume is almost not affected by the exhaust pressure, stable operation, low vibration, stable exhaust, and can maintain high efficiency within a wide range.

⑤ Multi-phase mixing and transmission: the rotor teeth of the screw compressor actually leave a gap between the surfaces of the rotor, and thus can withstand the impact of liquids, and can be pressurized to send liquid-containing gas, dust-containing gas, easy to polymerize gas, and so on.

⑥ Small volume per unit exhaust volume saves floor space.

Although the screw air compressor has the above advantages, but to keep the screw compressor unit work running normally, safely and reliably, keep long working life, we must develop a detailed maintenance program. It is best to carry out manned operation, regular maintenance, regular inspection, so that the air compressor can keep clean, no oil, no dirt. Only a thorough grasp of common-sense maintenance and familiarity with troubleshooting methods can ensure the smooth operation of the compressor.

4. What are the disadvantages of screw air compressor?

① It is a little noisy, generally need to install muffling and noise reduction equipment.

② Due to its strong balance, high-speed operation, so the power consumption is relatively high.

③ The gap between the screws will become larger after long-term operation, and it costs more to repair or replace them regularly.

5. Where can screw air compressors be used?

Screw air compressor with high reliability, easy maintenance, adaptability, and other unique advantages, with the deepening of its research and the continuous improvement of design technology, the performance of the screw air compressor will be further improved, and its application scenarios will become more and more extensive, such as PM VSD screw air compressor . In addition to traditional applications, screw compressors in the fuel, batteries and other new areas of application will be rapidly expanding. At the same time, due to the continuous improvement of the reliability of the screw compressor, so that it has gradually replaced the reciprocating compressor  in the range of medium refrigeration capacity and occupy a part of the market for centrifugal compressors.