​Construction and Working Principle of High-Pressure Centrifugal Blowers

Construction and Working Principle of High-Pressure Centrifugal BlowersConstruction of High-Pressure Centrifugal Blowers High-pressure centrifugal blowers typically consist of an inlet, impeller (working wheel), volute casing, and guide vanes. Structure of High-Pressure Centrifugal Blowers The impeller operates within the airflow and comprises a double-curved front disc, a flat rear disc, a hub sandwiched between them, and blades fixed to the hub. Air flows along the blades within the impeller. At the impeller outlet, the direction of the relative air velocity W2 forms an angle with the tangential velocity, known as the blade outlet angle. This angle, denoted as β2, determines the airflow characteristics. High-pressure centrifugal blowers predominantly feature backward-inclined blades. Two inlet configurations exist: single-suction and double-suction. Under equivalent conditions, the blade width (impeller) of a high-pressure centrifugal blower is twice that of a single-suction blower. A guide vane assembly (omitted in some ventilators) is installed between the inlet and impeller to pre-swirl the airflow entering the impeller, thereby regulating performance. What considerations are important for warehouse ventilation? (1) Determine if stored goods are flammable or explosive. For example, paint warehouses must use explosion-proof fans. (2) Select roof ventilators or eco-friendly centrifugal fans based on noise requirements. (3) Choose standard axial fans (SF) or exhaust fans (FA) according to the required ventilation volume for warehouse air.