Belt Driven Vs Direct Drive Fans

7 8 etc the flexible drive coupling loss is immeasurable and ignored so its drive efficiency follows that of an arr.

Belt driven vs direct drive fans.

May 3 2019 fanmann33 8 comments. Note that for shaft driven direct drive fans arr. On both direct drive and belt drive fans the motor has two bearings. You have a fan a motor and maybe a coupling.

Belt driven fans offer greater flexibility in terms of rpm speed. More often than not the maintenance cost of this kind of fan is also comparatively lower. The second pulley is connected to a shaft that drives the fan propeller. 4 direct drive fan.

Where on a belt drive fan the fan motor shaft has a pulley connected by a belt to a second pulley. Belt drive fans have two additional bearings. As energy costs increase it has become desirable to transition to a more efficient means of driving fan systems. There are some advantages and dis advantages direct drive and belt drive exhaust fans and supply fans have over each other.

Direct drive fans require fewer parts and thus usually less maintenance. 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. The two bearings on direct drive fan motors which are 7 horsepower and larger are typically regreaseable. Unlike the belt driven fans in case of a direct drive fan there is lesser energy loss.

Direct drive fans www airdistributor net official blog. Direct drive fans should be designed for acceptable bearing life. Since there is at least a 3 percent drive loss for a belt drive fan and no v belt drive loss for a direct drive fan the direct drive fan by default will be more efficient. 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.

In addition belt driven fans are less efficient than a direct driven fan of equivalent size due to transmission losses. Generally such fans are cheaper than direct drive fans of comparable size. This is because of the fact that the amount of friction is greatly reduced in case of this fan when the fan is operating. They re also typically more silent than the alternative.

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.