FRP Centrifugal Blowers

A centrifugal blower is a device that moves air through the use of centrifugal force generated by a rotating impeller. The impeller draws air or fluids into the blower and expels it through the outlet. The primary components of a centrifugal blower include the impeller, housing, and drive system. The impeller features blades mounted on a central hub connected to a fan shaft, which is crucial for its operation.

• The design of the drive system—whether belt-driven or direct drive—affects the rotational speed of the impeller. Due to their speed and efficiency, centrifugal blowers are versatile and find applications in various fields, such as drying processes and HVAC systems.
• The efficiency and performance of a centrifugal blower are influenced by the angle of its blades, which affects how effectively air is moved through the system. Blade angles typically fall into three categories: forward curved, backward curved, and radial.

The flow characteristics of a centrifugal blower are assessed by plotting its performance curve under unstable conditions known as surge. The operating airflow rate is determined by the intersection of these curves, which also allows for calculating the required power. As static pressure and flow levels increase, this intersection point typically shifts to lower flow rates if the blower control system remains unchanged.