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.

The second pulley is connected to a shaft that drives the fan propeller. You have a fan a motor and maybe a coupling. Direct driven fans mount the motor to the fan shaft in order to directly transmit energy. 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. They re also typically more silent than the alternative. 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. 4 direct drive fan.

Belt driven fans offer greater flexibility in terms of rpm speed. This is because of the fact that the amount of friction is greatly reduced in case of this fan when the fan is operating. 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. On both direct drive and belt drive fans the motor has two bearings.

Belt drive fans have two additional bearings. Note that for shaft driven direct drive fans arr. Unlike the belt driven fans in case of a direct drive fan there is lesser energy loss. Direct drive fans should be designed for acceptable bearing life.

As energy costs increase it has become desirable to transition to a more efficient means of driving fan systems. Generally such fans are cheaper than direct drive fans of comparable size. May 3 2019 fanmann33 8 comments. 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.

Direct drive fans have no power transmission loss since the propeller is directly connected to the motor shaft. 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. More often than not the maintenance cost of this kind of fan is also comparatively lower. Direct drive fans www airdistributor net official blog.

The two bearings on direct drive fan motors which are 7 horsepower and larger are typically regreaseable.