Variable frequency adjustment range of Roots blower
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The 960r/min Roots blower is equipped with frequency conversion control; what is the range of speed adjustment possible through this frequency conversion? What is the approximate minimum speed requirement for a Roots blower? Will reaching this minimum speed cause the blower to stop producing air flow? :)
Only a seasoned professional like me can answer this question: lol, the answer is that there is no answer. Rotary blowers are quite peculiar – they have a minimum speed, which is different from that of centrifugal and axial flow fans. This minimum speed depends on the model of the blower, and it is primarily determined by its structural characteristics. At low speeds, the heat generated due to backflow cannot be adequately dissipated by the newly incoming airflow, which can cause the rotor to get stuck. The minimum speed varies for each model
The maximum speed should be determined based on the exhaust temperature; generally, the exhaust temperature of rotary vane fans does not exceed around 140°C, otherwise the rotor is prone to sticking