Belt Drive Centrifugal Fan

The ventilation system demand is not constant forever in industrial facilities. Day by day, production is increasing, duct resistance is also increasing and the filtration requirement is changing. Those things will affect the industrial ventilation environment and change the airflow demand as well.

If the fan isn't operating at the right speed, then we have to face some consequences like expected airflow failure and extra electricity costs and premature bearing failure.

To overcome this problem, we often offer VFDs (variable frequency drives). But it has high capital costs with a complex electrical panel and electronic maintenance required that is not cost-effective for many industries.

This problem can be solved by using a Belt-Drive Centrifugal Fan through a simple mechanical principle. In this engineering, we use a V-belt and pulley system to connect the motor and impeller indirectly. Change the fan speed by simply changing the diameter of the drive pulley without any complexity of VFD, inverter cabinet or electronics programming. Any skillful maintenance technician can do this at his workshop.

Another significant benefit is that the belt drive isolates the motor from the fan shaft. So, the motor can stay far away in a clean and normal temperature from the dirty and hot air inside of the fan. It has high potential for those high-temperature process applications where we have to deal with direct-connected motor bearing stress and winding insulation problems.

A standard Belt Drive Centrifugal Fan comes with a backward-inclined impeller. Engineers focused on drive mechanism configuration rather than the impeller engineering characteristic here. So, impellers can be customized according to customer needs. So, it also can provide better efficiency, like other units. It has high airflow productivity with high pressure. This unit can run at 480 to 2975 RPM speed by changing the pulley ratio. It can easily tolerate high temperatures because the motor is always away from the heat.

In addition, engineers need to consider some extra care for this unit. For example, it is necessary to check the V-belt routinely, and the V-belt also needs to be changed after a certain period. It might need a bit more maintenance but it comes with speed-controlling features without a VFD. It is a good choice for those industries that need heavy industry and want reliable speed control without electronic drives.