The industrial centrifugal fans are used for moving air or gases, powdery substances, or tiny particles in a direction at an angle to the incoming duct in manufacturing process plants. The air flows along the centrifugal or radial direction, therefore they are sometimes called radial flow type fans.

1. Components Of An Industrial
Centrifugal Fans
Neel Rao
Writes on Reitzindia Industrial centrifugal fans &
Reitzindia industrial centrifugal process fans.

2. The industrial centrifugal fans are used for moving air or gases, powdery substances,
or tiny particles in a direction at an angle to the incoming duct in manufacturing
process plants. The air flows along the centrifugal or radial direction, therefore they
are sometimes called radial flow type fans.
Industrial Centrifugal fans are used to provide a high-pressure flow of air for
conveying, combustion air, cooling, exhaust, ventilation, and other uses. The
important parts of industrial centrifugal fans are fan housing, inlet and outlet ducts,
impellers, driveshaft, drive mechanism fan dampers and vanes, fan blades,
couplings, bearings, isolators, hoods, flanges, guards, fan discharge casing, impeller
locking device, and shaft seal plates.

3. Fan housing enhances the efficiency of the fan by reducing noise and acting as a
protection for moving parts like a hub, impeller, etc. In an industrial centrifugal fan,
the stream of air gets into the impeller in an axial direction, gains acceleration due
to centrifugal force as it flows through the fan blades, and gets released radially in
90 degrees direction from the fan housing.
Inlet and outlet ducts will affect the airflow pattern and performance of the fans.
Inlet ducts direct the flow of air or gas by admitting required amounts of air whereas
resistance is imposed to the air stream by outlet ducts. Ducts with sharp-cornered
turns result in inefficient operation of the fan.

4. An impeller is a rotating device consisting of several fan blades mounted on a hub
with a drive shaft that drives the air or gas in the desired direction with increased
pressure. For industries with large capacity plants which need high-pressure airflow,
custom-designed impellers are used such as multistage impellers and double inlet
impellers in which two or more impellers with a single inlet are mounted back to
back on the same shaft.

5. The driveshaft is a rotating device that holds the blades and impeller. It controls the
speed of the fan rotor through different drive mechanisms like a belt driven, direct
driven and variable. The design of the drive shaft depends on the velocity of inlet
gases and the weight of the installed impeller. The fan speed is directly proportional
to the motor speed in direct driven fans because in these fans the shaft is
straightaway connected to the motor shaft of the fan. The rotor speed is fixed in
belt-driven fans unless the belt gets misplaced from its position because in these
fans the motor shaft and the fan shaft are attached by the belt which is mounted on
the sheave. Couplings are used by direct driven & variable-driven fans (using VFD),
to get the desired variable speed by establishing a connection between the motor
shaft and rotor shaft. Some of the industrial centrifugal fans consist of electronic
variable speed drives that can automatically control the fan speed at the desired
level.

6. The industrial centrifugal fans are robust in structure, typically drum-shaped devices
which consist of several fan blades mounted around the hub. In the fan housing, the
hub turns on a drive shaft. The air or gas enters into the impeller from the side of
the fan wheel, turns 90 degrees and accelerates due to the centrifugal force as it
flows over the fan blades and gets released from the fan housing.

7. About REITZINDIA
Reitzindia industrial fan manufacturers are custom designed to serve the needs of
various processes in industries like cement, iron & steel, power plants, fertilizers/
chemicals and more. As a top quality Reitzindia centrifugal blower manufacturers,
Reitz India has set a benchmark in delivering superior fans with high quality features
and better industrial standards.
Thank you for spending your precious time in reading this article!