Centrifugal Fan Housing

The centrifugal fan housing is a crucial component, responsible for guiding airflow, protecting internal parts, and influencing overall performance. The housings structural design directly affects the fans efficiency, noise level, and durability.

The main body of the housing is typically volute-shaped, designed with a logarithmic spiral that gradually expands to slow down airflow and convert kinetic energy into static pressure.

Common materials for centrifugal fan housings include carbon steel, stainless steel, or cast iron. Special environments (such as acidic or alkaline gases) may require anti-corrosion coatings or plastics (such as fiberglass).

Functions of the centrifugal fan housing:
Collects high-speed airflow discharged from the impeller and guides it to the outlet.
Provides structural support, protecting the internal impeller and main shaft.
Reduces airflow noise; some housings are lined with sound-absorbing materials.

Different application scenarios (such as induced draft fans for boilers, dust removal fans) may lead to significant differences in the design of the fan housing and impeller. For example, high-pressure fans have smaller impeller diameters and higher speeds, resulting in more compact housings.