Centrifugal Blower Fan Diagram

A centrifugal fan or centrifugal blower is a pump or motor that moves air.

Centrifugal blower fan diagram.

An impeller sucks or pulls air in contrast to a propeller which pushes air. It pulls the air inside the blower and then pushes it out at a 90º angle. The name centrifugal fan is derived from the direction of flow and how the air exits the fan impeller radially from the outer circumference of the fan. Such a fan is also called a blower fan biscuit blower citation needed or squirrel cage fan because it looks like a hamster wheel.

A centrifugal fan is a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid. Single unspared centrifugal compressor trains support the entire operation of steam crackers producing in excess of 1 000 000 metric tons approximately 2 2 billion lbs of ethylene per year. Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink. Fig 3 shows the velocity diagram for the air flowing into the fan inlet and out of it outlet.

Designations for rotation. Equipment cooling blowers create a more concentrated stream of air than equipment cooling fans to blow away the heat generated by electronic equipment induction heaters and high wattage bulbs. The centrifugal fans with backward curved blades are designed as freewheel fans and do not require a scroll housing. Centrifugal compressors blowers and fans form the basic make up of unspared machinery equipment in petrochemical process plants.

The shape of your blades and the direction they travel will define the performance characteristics of your fan. A backward curved centrifugal fan is characterised by its cylindrical shape several large curved blades and a conical inlet nozzle. This page shows proper designations for inlet box positions in degrees. The pressure head of different types of fans with equal periphery speed of the wheel are compared in the capacity diagram below.

Fans or when requesting data or prices the required fan arrangement must always be indicated. Centrifugal fans with forwarded blades are suited for application with higher air flow volumes and pressures. Direct drive fans have fewer moving parts than belt drive fans for less maintenance. Inlet box positions for centrifugal fans standard 99 2405 03 see page 4 and 8.

The two main components of a centrifugal fan are the motor and the impeller. Types of fans. The inlet and outlet velocities of the air through the blades will be the same for axial fans and different for centrifugal fans v ᵢ and v ₒ. Republic manufacturing offers all high quality replacement parts needed for centrifugal blowers.