The difference between screw compressor and scroll compressor

The difference between screw compressor and scroll compressor is mainly reflected in the following aspects:

working principle:

screw compressor: Relying on the meshing movement of the male and female rotors, the process of lifting the low-pressure gas to high-pressure gas is completed by means of a pair of "V"-shaped interdental volumes formed by their teeth, tooth slots and the inner wall of the casing. When the rotor groove passes through the suction port, it is filled with gas. When the rotor rotates, the rotor groove is closed by the casing wall to form a compression chamber and realize the compression function.

Scroll compressor: a positive displacement compression compressor, the compression component is composed of a moving scroll and a fixed scroll. Its working principle is to use the relative revolution of the dynamic and static scroll to form a continuous change in the closed volume to achieve the purpose of compressing gas.

Efficiency:

screw compressors: generally more efficient at medium to high loads.

Scroll compressor: high efficiency at low load and part load.

Noise and vibration:

screw compressors: Usually the noise and vibration levels are relatively low, but in some cases may produce a certain amount of noise.

Scroll compressor: may produce high noise and vibration at high speed.

Maintenance:

screw compressor: maintenance is relatively simple, less parts, and easy to repair, but the need for regular replacement of parts such as air filters.

Scroll compressors: More frequent maintenance may be required, especially for components that operate at high speeds.

Cost:

screw compressors: Usually the initial purchase cost is higher, but the long-term operating cost may be lower.

Scroll compressors: The initial purchase cost may be low, but the long-term operating cost may be high due to maintenance requirements.

Application occasions:

screw compressor: suitable for occasions requiring continuous, stable and medium and high load operation, such as light industry, electric power, metallurgy and other industries.

Scroll compressor: It is more suitable for occasions that require frequent start and stop or large load changes, such as air compression, oil and gas, chemical, electric power, refrigeration and air conditioning industries.

In summary, there are obvious differences between screw compressors and scroll compressors in terms of working principle, efficiency, noise and vibration, maintenance, cost, and applications. Which type of compressor to choose depends mainly on the specific application needs and scenarios.