Comparison between Roots blower and air suspension blower
There are significant differences between Roots blower and air suspension blower in multiple aspects. The following is a detailed comparison between the two:
1、 Working principle
Roots blower: Roots blower belongs to positive displacement blower, and its working principle is to use two blade rotors (usually three blades) to compress and transport gas through relative motion in the cylinder. This type of fan has a simple structure and is easy to manufacture. It ensures continuous gas flow and reduces leakage through small gaps between the rotors.
Air suspension fan: The air suspension fan adopts the centrifugal working principle, and achieves air suction and compression through magnetic levitation technology and non-contact motor drive. Its overall structure has a high degree of integration, including components such as volutes, permanent magnet motors, and air suspension bearings. The use of air suspension bearings reduces mechanical friction and improves the operational efficiency and lifespan of the fan.
2、 Requirement occasions
Roots blower: Roots blowers are suitable for material conveying, gas pressurization, and other applications, especially performing well in low-pressure gas conveying and pressurization systems. In addition, it is widely used in aquaculture oxygenation, sewage treatment aeration and other fields.
Air suspension fan: Air suspension fans are more suitable for high-pressure, high flow situations, such as turbine generator sets, railway braking devices, etc. Its high air volume and high pressure make it an ideal choice in these fields.
3、 Output pressure and air volume range
Roots blower: The output pressure of Roots blower is usually between 0.11.2kgf/cm2, and the air volume range is between 0.5100m3/min (also known as pressure 9.8196kpa, air volume 0.6824.6m3/min). These parameters vary depending on the specific model and purpose, but overall, Roots blowers are suitable for applications with low to medium pressure and low to medium air volume.
Air suspension fan: The output pressure of an air suspension fan is usually between 510kgf/cm2, and the air volume range is between 10500m3/min. These parameters enable air suspension fans to handle larger scale gas transport and compression tasks.
4、 Volume and weight
Roots blower: Roots blowers are usually large in size and bulky, requiring installation on a foundation fixed on the ground. This to some extent limits the flexibility and convenience of its installation.
Air Suspension Fan: Air suspension fans are compact in size, lighter in weight, highly integrated in overall structure, and easier to install and use. This gives air suspension fans greater advantages in situations where they need to be moved or their installation positions frequently changed.
5、 Maintenance cost and service life
Roots blower: The bearings used in Roots blower are ordinary speed increasing bearings that require regular lubrication with grease. Meanwhile, due to its high mechanical friction, its service life is mostly between 5-10 years. The maintenance cost is relatively high, but it is widely used due to its simple structure and low price.
Air suspension fan: The bearings used in the air suspension fan are air suspension bearings, which do not require lubrication with grease and are relatively simpler and more convenient to maintain. Meanwhile, due to low friction, the service life is longer and the usage cost is relatively lower. However, its procurement cost is relatively high, mainly due to the use of advanced magnetic levitation technology and material manufacturing.
In summary, there are significant differences between Roots blowers and air suspension blowers in terms of working principles, demand scenarios, output pressure and air volume ranges, volume and weight, maintenance costs, and service life. The choice of fan depends on the specific application scenario and requirements.
