Which is better, scroll air compressor or screw air compressor

Choosing among different types of air compressors is a relatively difficult problem. Here are the advantages and disadvantages of "oil-free scroll air compressor" and "screw air compressor" for your reference.

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first of all, we must understand that oil-free scroll air compressor and screw air compressor are all volumetric rotary compressors. The main difference is that the design compression principle is different. Since the design is different, the field and scene used must be different. Here to give you the analysis of specific points of knowledge.

Which is better, oil-free scroll air compressor or screw air compressor? Listen to the analysis of professionals

[a] oil-free scroll air compressor advantages:

(1) The oil-free scroll air compressor belongs to the positive displacement rotary machinery, which uses the meshing of the scroll rotor and the scroll stator to form a plurality of compression chambers;

(2) There is no reciprocating mechanism, so the structure is simple, small in size, light in weight, few parts (especially few wearing parts), and high reliability;

(3) The torque change is small, the balance is high, the vibration is small, and the operation is stable, so the operation is simple and easy to realize automation;

(4) It has high efficiency within the scope of its cooling capacity;

(5) Low noise.

[two] oil-free scroll air compressor shortcomings:

(1) The surface of the moving parts is mostly curved, and the processing and inspection of these curved surfaces are more complicated, and some require special equipment, so the manufacturing cost is higher;

(2) Between the moving parts or between the moving parts and the fixed parts, often to maintain a certain movement gap to achieve sealing, gas through the gap is bound to cause leakage. This limits the rotary compressor is difficult to achieve a large compression ratio, so it is mostly used in air conditioning conditions;

(3) The screw air compressor is also a rotary volumetric machine. The compression of air is achieved by the volume change of the tooth grooves of the male and female rotors that are parallel to each other in the casing.

Oil-free Scroll Air Compressor

[three] screw air compressor advantages:

(1) The screw compressor is the same as the oil-free scroll air compressor and belongs to the positive displacement compressor;

(2) high reliability: screw compressor parts less, no wearing parts, so it is reliable operation, long life, overhaul interval of up to 4-80000 hours;

(3) Convenient operation and maintenance: The screw compressor has a high degree of automation, and the operator does not have to undergo a long period of professional training, and can realize unattended operation;

(4) Good power balance: The screw compressor has no unbalanced inertial force, the machine can work smoothly at high speed, and can realize no basic operation. Particularly suitable for mobile compressor, small size, light weight, less floor space;

(5) Strong adaptability: The screw compressor has the characteristics of forced gas transmission, and the volume flow is almost not affected by the exhaust pressure. It can maintain high efficiency in a wide range and is suitable for a variety of working conditions without any change in the structure of the compressor.

[four] screw air compressor shortcomings:

(1) the rotor tooth surface is a space surface, need to use a special tool, in the expensive equipment processing, the body parts processing accuracy also has higher requirements, must use high precision equipment.

(2) Since the interdental volume is periodically communicated with the suction and exhaust ports, the compressor noise is relatively high.

(3) due to the rotor stiffness and bearing life and other limitations, the compressor can only rely on the gap seal, so the screw compressor can only be applied to the low pressure range, can not be used for high pressure occasions.

(4) Due to the large amount of oil injection and the complexity of the oil treatment system, there are many ancillary equipment of the unit.

(5) The screw compressor relies on the gap seal gas, and does not have superior performance in the small volume range.