Direct Drive Fan Vs Belt Driven Fans

More often than not the maintenance cost of this kind of fan is also comparatively lower.

Direct drive fan vs belt driven fans.

There s also no belt residue and these fans cost less to maintain generally speaking because belts don t wear down and break. 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. Belt drive fans have the two motor bearings similar to direct drive fans plus the two shaft bearings. 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.

The second pulley is connected to a shaft that drives the fan propeller. Where on a belt drive fan the fan motor shaft has a pulley connected by a belt to a second pulley. When compared to belt drive fans which require belts sheaves and bushings direct drive is just plain simpler and maintenance folks tend to lean toward direct drive for daily maintenance. You have a fan a motor and maybe a coupling.

Because of the fewer parts involved they can often be more compact in design. Direct drive fans with relubricable motor bearings must be lubricated as per the fan manufacturer s recommendations in terms of grease type and frequency. This is because of the fact that the amount of friction is greatly reduced in case of this fan when the fan is operating. There is no defined limit on motor horsepower for direct drive fans which allow a wide range of flexibility for application requirements.

Direct drive advantages direct drive fans are typically lower maintenance since there are no bearings belts or sheaves to maintain. Direct driven fans mount the motor to the fan shaft in order to directly transmit energy. As energy costs increase it has become desirable to transition to a more efficient means of driving fan systems. Direct drive fans require fewer parts and thus usually less maintenance.

Unlike the belt driven fans in case of a direct drive fan there is lesser energy loss. In addition belt driven fans are less efficient than a direct driven fan of equivalent size due to transmission losses.