Screw air compressor selection reference_Working principle_Application range

Screw compressors:

A screw air compressor is a type of rotary displacement compressor in which two rotors with helical gears mesh with each other to compress and discharge the gas.

Screw air compressors are divided into single-screw and twin-screw according to the number; according to whether there is lubricating oil involved in the compression process, they are divided into oil-injected and oil-free screw air compressors, and oil-free compressors are divided into dry and water-sprayed. kind.

Generally speaking, the screw air compressor has simple structure, few wearing parts, low exhaust temperature, and large pressure ratio, especially not afraid of liquid and dust in the gas compression. The screw compressors used (including screw air compressors, screw refrigerators, etc.) have developed rapidly at home and abroad.

Working principle:

The screw air compressor uses the mutual meshing of the male and female screw rotors to continuously reduce the volume between the teeth and increase the pressure of the gas, thereby continuously generating compressed air. Screw air compressors also belong to volumetric compressors, but due to the working principle of screw models, compared with piston air compressors, screw air compressors have stable air supply and generally do not need to be equipped with air storage tanks.

The main advantage:

1. High reliability: The screw air compressor has few parts and wearing parts, so it operates reliably and has a long service life.

2. Convenient operation and maintenance: the operator does not need to undergo long-term professional training, and can realize unattended operation. The operation is relatively simple, and the gas can be supplied according to the required displacement.

3. Good power balance: the screw air compressor has no unbalanced inertial force, the machine can work smoothly at high speed, and can realize non-foundational operation, especially suitable for mobile compressors, small in size, light in weight, and less in floor space.

4. Strong adaptability: The screw air compressor has the characteristics of forced air delivery, the exhaust volume is almost not affected by the exhaust pressure, the operation is stable, the vibration is small, the exhaust is stable, and it can maintain high efficiency in a wide range .

5. Multi-phase mixed transmission: There is actually a gap between the rotor tooth surfaces of the screw air compressor, so it can withstand the impact of liquid, and can be compressed to send liquid-containing gas, dust-containing gas, and easily polymerized gas.

6. The unit exhaust volume is small, saving floor space.

Although the screw compressor has the above advantages, but to keep the screw compressor unit working normally, safe and reliable, and have a long working life, a detailed maintenance plan must be formulated. It is best to perform scheduled operations, regular maintenance, and regular inspection and maintenance to keep the compressor clean, oil-free, and dirt-free. Only by comprehensively mastering the common sense of maintenance and familiar with the solutions to faults can the smooth operation of the compressor be guaranteed.

Applications:

Screw compressors have unique advantages such as high reliability, convenient maintenance, and strong adaptability. With the continuous deepening of its research and continuous improvement of design technology, the performance of screw compressors will be further improved, and its application fields will be more and more widely. In addition to traditional applications, the application of screw compressors in new fields such as fuel and batteries will expand rapidly. At the same time, due to the continuous improvement of the reliability of the screw compressor, it has gradually replaced the reciprocating compressor in the range of medium cooling capacity, and occupied part of the centrifugal compressor market.

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