On a direct drive fan as implied by the name the fan propeller is connected directly to the shaft of the motor.
Belt drive vs direct drive fan.
In the former the motor connects to the fan wheel with nothing in between.
This week s podcast is an overview of direct drive vs belt drive fans.
The two bearings on direct drive fan motors which are 7 horsepower and larger are typically regreaseable.
In the later there is a belt sometimes more than one connecting the motor to move the fan.
The environmental conditions in which the fan is installed may dictate a preference toward a belt or direct drive fan.
Extreme hot cold dirty or humid conditions may favor a direct drive fan as it reduces the environmental impact on the drive belts and fan 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.
Direct drive fans have no power transmission loss since the propeller is directly connected to the motor shaft.
It s a motor connected to your fan in one of only two ways.
Direct drive or belt drive.
The second pulley is connected to a shaft that drives the fan propeller.
Unlike belt driven fans there s less energy loss because there s a reduced amount of friction as the fan operates.
May 3 2019 fanmann33 8 comments.
Where on a belt drive fan the fan motor shaft has a pulley connected by a belt to a second pulley.
Direct drive fans should be designed for acceptable bearing life.
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 both direct drive and belt drive fans the motor has two 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.
Belt drive fans have two additional bearings.
There s also no belt residue and these fans cost less to maintain generally speaking because belts don t wear down and break.
Unlike the belt driven fans in case of a direct drive fan there is lesser energy loss.
Belt drive vs direct drive largest fan blower factory in china direct drive is more typical on smaller blowers and generally offers lower cost fewer components to assemble greater efficiency no drive losses reduced maintenance no separate bearings or belts and greater reliability.
Direct drive fans www airdistributor net official blog.
