The difference between centrifugal fan and Roots blower
Centrifugal fans and Roots blowers are two common gas conveying equipment, which have significant differences in structure, working principle, performance characteristics, and application scenarios. Understanding these differences can help users choose the appropriate type of fan based on their actual needs.
Firstly, there are significant structural differences between centrifugal fans and Roots blowers. Centrifugal fans are mainly composed of components such as impellers, casings, and motors. The impeller generates centrifugal force during rotation, which throws gas out from the center and delivers it to the outlet through the casing. The Roots blower is mainly composed of two interlocked rotors and a casing. During the rotation of the rotor, gas is drawn in from the inlet and compressed before being discharged from the outlet.
Secondly, centrifugal fans and Roots blowers have different working principles. The working principle of a centrifugal fan is to generate centrifugal force through the rotation of the impeller, which throws gas out from the center and delivers it to the outlet through the casing. The airflow direction of a centrifugal fan is perpendicular to the rotation direction of the impeller, therefore it belongs to the category of radial flow fans. The working principle of Roots blower is to seal the gas in the space between two rotors and the casing through the rotation of the rotor, and compress it. The airflow direction of the Roots blower is parallel to the rotation direction of the rotor, therefore the Roots blower belongs to a positive displacement fan.
Thirdly, there are differences in performance characteristics between centrifugal fans and Roots blowers. Centrifugal fans have high pressure and large air volume, which can provide stable airflow at high pressure. Due to its centrifugal working principle, the centrifugal fan has minimal airflow pulsation and is suitable for situations that require high airflow stability. The Roots blower has high pressure and large air volume, which can provide stable airflow at high pressure. Due to its volumetric working principle, the Roots blower has minimal airflow pulsation and is suitable for applications that require high airflow stability.
In addition, centrifugal fans and Roots blowers have different applications. Centrifugal fans are widely used in fields such as ventilation, air conditioning, cooling, and dust removal. Due to its reliable characteristics, centrifugal fans play an important role in these fields. Roots blowers are widely used in industries such as sewage treatment, pneumatic conveying, vacuum packaging, chemical, metallurgical, food, and medicine. Due to its reliable characteristics, Roots blowers play an important role in these industries.
Overall, there are significant differences between centrifugal fans and Roots blowers in terms of structure, working principle, performance characteristics, and application scenarios. When selecting the type of fan, users should consider the actual needs and application scenarios comprehensively and choose the most suitable type of fan.
