Direct Drive Vs Belt Driven Fans

There is no defined limit on motor horsepower for direct drive fans which allow a wide range of flexibility for application requirements.

Direct drive vs belt driven fans.

In addition belt driven fans are less efficient than a direct driven fan of equivalent size due to transmission losses. Direct drive fans should be designed for acceptable bearing life. Where on a belt drive fan the fan motor shaft has a pulley connected by a belt to a second pulley. On both direct drive and belt drive fans the motor has two bearings.

Deciding between a direct drive fan and a belt drive fan is fairly straightforward once you know all of your other variables like fan size application space fan speed needs and likely wear and tear in your application. There are some advantages and dis advantages direct drive and belt drive exhaust fans and supply fans have over each other. There s also no belt residue and these fans cost less to maintain generally speaking because belts don t wear down and break. Direct drive fans have no power transmission loss since the propeller is directly connected to the motor shaft.

This is because of the fact that the amount of friction is greatly reduced in case of this fan when the fan is operating. On a direct drive fan as implied by the name the fan propeller is connected directly to the shaft of the motor. In the former the motor connects to the fan wheel with nothing in between. 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 driven fans mount the motor to the fan shaft in order to directly transmit energy. It s a motor connected to your fan in one of only two ways. In the later there is a belt sometimes more than one connecting the motor to move the fan.

More often than not the maintenance cost of this kind of fan is also comparatively lower. As energy costs increase it has become desirable to transition to a more efficient means of driving fan systems. Direct drive fans configure the overall fan and motor assembly in a narrower more straight line footprint than belt drive fans which tend to have shorter and wider footprints. Unlike belt driven fans there s less energy loss because there s a reduced amount of friction as the fan operates.

Unlike the belt driven fans in case of a direct drive fan there is lesser energy loss. Belt drive fans have two additional bearings.