2026-04-14Views：
There are significant differences between screw and scroll compressors in terms of structure, working principle, performance characteristics and application fields. The following is a detailed comparison of the two:
| Screw compressor | scroll compressor | |
|---|---|---|
| working principle | the twin-screw screw compressor rotates in the cylinder through a pair of intermeshing spiral male and female rotors to complete the process of suction, compression and exhaust. The single screw compressor compresses gas by rotating a rotor and a pair of star discs. | The scroll compressor uses a fixed involute scroll and an eccentric rotating and flat moving involute scroll to form a compressible volume, and the suction, compression and discharge of gas are realized by the dynamic and static discs. |
| Structural features | the cylinder is equipped with a pair of spiral male and female rotors meshing with each other, and the gap between the rotors and the casing and the rotor is very small. | The air cavity is mainly composed of a fixed scroll and a static scroll. The moving scroll is driven by an eccentric shaft and restricted by an anti-rotation mechanism, and rotates on a plane with a small radius around the center of the static scroll base circle. |
| Screw compressor | scroll compressor | |
|---|---|---|
| efficiency | the screw compressor has the characteristics of forced gas transmission, the gas transmission volume is almost not affected by pressure, and can maintain high efficiency in a wide working range. However, with the increase of pressure ratio, the leakage loss also increases rapidly, so the efficiency of low temperature operation is significantly reduced. | The scroll compressor has no suction and exhaust valves, the rotation radius of the contact line is small, the friction speed is low, the loss is small, and the efficiency is high. |
| Vibration and noise | the screw compressor has no reciprocating mass inertia force, good power balance performance and small vibration. However, due to the rotor cogging periodically high-speed through the suction and exhaust holes, as well as through the gap leakage and other reasons, the noise is larger. | Scroll compressor due to the suction, compression, exhaust process is carried out at the same time, the pressure rise is slow, the torque change amplitude is small, the vibration is small. At any frequency, the vibration and noise are lower than those of piston compressors and rolling rotor compressors. |
| gas transmission coefficient | the screw compressor has no intake and exhaust valves and clearance volume, good sealing and cooling effect, and high gas transmission coefficient. | Scroll compressor suction, compression, exhaust continuous one-way, direct suction, suction gas harmful overheating is small, and there is no clearance volume in the gas expansion process, so the gas transmission coefficient is high. |
| Reliability | screw compressor parts less, no wearing parts, reliable operation, long life. | The scroll compressor has simple and compact structure, light weight, small size and high reliability. |
| Tuning performance | through the slide valve and other devices to achieve energy stepless adjustment. | Scroll compressors are particularly adapted to variable speed operation and frequency conversion technology. |
| Scope of application | screw compressor has high speed, small size, light weight, low exhaust pulse, suitable for a variety of refrigerants, high volumetric efficiency, especially suitable for mobile compressors. However, the rotor is difficult to process and is sensitive to liquid feed. | The scroll compressor is suitable for a wider speed range, and it is promising to use the scroll compressor for variable frequency adjustment of air delivery in air conditioning or heat pump. However, the demand for high compression ratio and large displacement of compressed gas limits the development of scroll compressors. |
In summary, screw and scroll compressors have their own unique advantages and areas of application. When selecting, it is necessary to comprehensively consider factors such as specific application scenarios, performance requirements, and economy.
Two air compressors can supply air to the same pipeline, but they need to be reasonably configured according to the equipment type, control mode and pipeline design to ensure stable and efficient operation of the system. The following is the specific analysis: 1. feasibility analysis basic conditions pressure matching: two
In compressed air applications, the core consideration of choosing an all-oil-free compressor is its cleanliness guarantee for the production environment and product quality. The traditional oil compressor through the injection of lubricating oil to achieve component lubrication, the output air may contain trace oil residue, long-term use.
Screw permanent magnet variable frequency air compressor is an advanced compressor with high efficiency, energy saving, stable operation, low noise and vibration, strong adaptability and good environmental protection and economic benefits. The following is a rigorous analysis of its advantages: 1. high efficiency and energy saving characteristics of screw permanent magnet variable frequency air pressure
Q: Is there any difference between an oil-free air compressor and an ordinary air compressor? A: There is a difference. The oil content of the gas compressed by the oil-free air compressor is oil-free. For example, the water-lubricated oil-free air compressor produced by Shanghai Granklin Group, the air compressor machine
Explosion-proof air compressor gas source is equipped with many aspects, including the choice of explosion-proof air compressor, gas source pressure, flow, purification level and special safety requirements. The following is a detailed summary of these aspects: the choice of explosion-proof air compressor: according to
The replacement cycle of air compressor oil varies due to factors such as the type of oil used, the environment in which the air compressor is used, and the operating time. The following are general guidelines: Determine the replacement cycle according to the oil type Mineral oil: Replacement cycle: It is recommended to replace one every 3 to 4 months
Q: Which supplier of water lubricated air compressor? A: Shanghai Granklin Group. Granklin Group is a manufacturing enterprise located in Shanghai, with single screw water lubricated air compressor write-off parts "water lubricated air compressor head"
The use method and precautions of the air compressor are the key to ensure the safe and efficient operation of the equipment. The following is a detailed description of these two aspects: Use method Preparation before starting: Check whether the parts of the air compressor are in good condition, whether the fastening bolts are loose, and the belt Or chain and other transmission parts
Water lubricated air compressor cooling water requirements mainly include the following aspects: water quality requirements: cooling water must be clean, can not contain too many impurities, suspended solids, organic matter or corrosive substances. These contaminants can cause clogging of the waterway system
The amount of water that can be removed by the cold dryer (freeze dryer) is not a fixed value, but is affected by many factors. The following are some of the main influencing factors and related explanations: Intake air temperature and humidity: The higher the intake air temperature and humidity, the higher the compression
2018 Granklin Group. All rights reserved 沪ICP备18000439号-2
