What are the differences between rotary fan and Roots fan?

Today, I learned the difference between the rotary fan and the Roots fan by learning the knowledge about the fan. These two types of fans are widely used in industrial production, but their working principles and structures are different. I will introduce their differences in detail below.

The first is the rotary fan.

Rotary fan, also called centrifugal fan, is a mechanical equipment that uses centrifugal force to compress or increase the flow rate of gas or gas mixture.

The rotary fan is composed of impeller, casing, inlet and outlet flanges, etc.

The gas enters the casing from the flange and generates centrifugal force under the action of the impeller to compress or accelerate the gas and discharge it from the outlet flange.

There are single-stage and multi-stage rotary fans, which can meet different flow and pressure requirements.

The advantages of the rotary fan are simple structure, reliable operation, and suitable for conveying and processing large quantities of gas, but the disadvantages are high noise and low efficiency.

Next is Roots blower.

Roots blower, also known as blower, is a mechanical equipment that uses two meshing triangular impellers to compress or increase the flow rate of gas or gas mixture.

Roots blower consists of two gears and two triangular impellers.

The gas enters from, is sucked in by the impeller, compressed, and then discharged.

Roots blower has the advantages of low noise and high efficiency, and is suitable for low pressure and large flow gas transmission and processing, but has the disadvantage of complex structure and difficult maintenance.

To sum up, although the rotary fan and Roots fan use the mechanical principle to compress the gas or increase its flow rate, their structures and working principles are different.

The rotary fan is suitable for conveying and processing large quantities of gas, and the Roots fan is suitable for conveying and processing low pressure and large flow gas.

In practical application, it is necessary to select the appropriate fan according to the specific situation to achieve the effect.