Screw compressor and scroll compressor which is good

Comparison of Technical Characteristics of Screw and Scroll Air Compressors

in the field of compressed air equipment, screw and scroll compressors have different application characteristics due to structural differences. The specific differences can be summarized as follows:

1. working principle difference

• screw compressor: through the Yin and Yang rotor meshing movement to achieve gas compression, divided into single screw and twin screw two structural forms
• scroll compressor: a crescent-shaped compression cavity is formed by the relative movement of the moving scroll and the static scroll, and the compression process is completed through continuous volume change

2. comparison of performance parameters

• energy efficiency performance: the scroll type has obvious energy efficiency advantages under low load conditions, and the screw type is more efficient at full load operation.
• Pressure range: screw type is suitable for 0.3-1.5MPa medium and high pressure scenes, scroll type is usually used in 0-0.3MPa low pressure fields
• flow output: screw type can realize large flow continuous gas supply, scroll type is more suitable for small flow precision control

3. difference of operating characteristics

• noise control: scroll type adopts symmetrical compression structure, and the operating noise is 5-10 decibels lower than that of screw type
• vibration level: the balanced design of the screw rotor makes the vibration value lower than that of the scroll type
• starting characteristics: both support soft start, but the screw starting torque is greater

4. maintenance Requirements

• screw type: the rotor clearance should be checked regularly, and the lubricating oil and oil filter should be replaced. The maintenance period is about 2000 hours.
• Scroll type: maintenance focuses on seal inspection and air filter element replacement, with a maintenance cycle of about 4000 hours.

5. Typical application scenarios

• screw compressor: suitable for manufacturing centralized gas supply, automated production lines and other scenarios that require continuous and stable gas supply.
• Scroll compressor: mostly used in medical equipment, food packaging, laboratory instruments and other occasions requiring low noise precision gas supply

this comparison is based on general technical principles, and specific equipment selection shall be confirmed in combination with actual working condition parameters and manufacturer's technical specifications.