Belt Driven Vs Direct Drive Fans

On both direct drive and belt drive fans the motor has two bearings.

Belt driven vs direct drive fans.

May 3 2019 fanmann33 8 comments. Belt driven fans offer greater flexibility in terms of rpm speed. Direct driven fans mount the motor to the fan shaft in order to directly transmit energy. They re also typically more silent than the alternative.

The second pulley is connected to a shaft that drives the fan propeller. The two bearings on direct drive fan motors which are 7 horsepower and larger are typically regreaseable. Direct drive fans should be designed for acceptable bearing life. More often than not the maintenance cost of this kind of fan is also comparatively lower.

Generally such fans are cheaper than direct drive fans of comparable size. 7 8 etc the flexible drive coupling loss is immeasurable and ignored so its drive efficiency follows that of an arr. Belt drive fans have two additional bearings. Unlike the belt driven fans in case of a direct drive fan there is lesser energy loss.

4 direct drive fan. You have a fan a motor and maybe a coupling. Direct drive fans require fewer parts and thus usually less maintenance. Direct drive fans www airdistributor net official blog.

Where on a belt drive fan the fan motor shaft has a pulley connected by a belt to a second pulley. Note that for shaft driven direct drive fans arr. However a belt drive fan has power transmission loss due to the friction between the belt and sheaves and due to the drive shaft bearings. Either of these motor mount options can typically be found in wall mount exhaust and supply fans roof mount exhaust and supply fans inline duct fans and air circulation products.

This is because of the fact that the amount of friction is greatly reduced in case of this fan when the fan is operating. In addition belt driven fans are less efficient than a direct driven fan of equivalent size due to transmission losses. As energy costs increase it has become desirable to transition to a more efficient means of driving fan systems. More friction between moving parts which can lead to more maintenance and higher energy costs.

There are some advantages and dis advantages direct drive and belt drive exhaust fans and supply fans have over each other.