Blowers can be driven either directly or by belt transmission. Typically, belt transmission is preferred because, in direct-drive blowers, the blower’s speed is synchronous with the motor's speed. For ordinary 4-pole motors, the speed is 1470 RPM. Using motors with different pole counts is more costly; therefore, 4-pole motors are generally chosen. Using belt transmission is both economical and durable.  

When employing V-belt drive, a common question is how to calculate the blower speed when it differs from the motor speed. The following formula can be used:  

\[ \text{Motor Speed} = \text{Blower Speed} \times \left(\frac{\text{Blower Pulley Diameter}}{\text{Motor Pulley Diameter}}\right) \]  

From this formula, it's clear that as long as the blower pulley size remains constant and the blower speed is determined by the airflow and pressure requirements, which can be found in the product manual, the blower speed is defined. Given that the motor speed is also fixed, calculating the size of the motor pulley becomes straightforward.  

When choosing the blower speed, it should meet the technical parameters for flow rate and pressure while minimizing speed to extend the blower's service life.  

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