A ventilation fan is a machine that uses mechanical energy input to increase the pressure of working gas and discharge it. It is a type of driven fluid engineering machinery. It is widely used in ventilation, dust removal, and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings; ventilation and induced draft in boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; grain drying and selection; wind tunnel sources; and ventilation and propulsion for hovercraft.
Its working principle is roughly the same as that of a turbo compressor, but due to the low gas flow rate, pressure changes are usually not a necessary consideration of changes in the specific volume of the gas. That is, the gas is not considered as a variable quantity. Its working principle is roughly the same as that of a turbo compressor, but due to the low gas flow rate, pressure changes are usually not a necessary consideration for changes in the specific volume of the gas, meaning the gas is treated as an incompressible fluid. Ventilation fan manufacturers state that, under design technical conditions, the fan operates at 15 kPa to 0.2 MPa or has a compression ratio e = 1.15 to 3.
Its operating characteristics:
1. Due to the frictionless operation of the impeller within the fan body, it requires no lubrication, and oil is discharged directly from the gas. This makes it ideal for industrial applications involving chemicals, food, and other air transport.
2. The fan is a positive displacement blower. During use, the flow rate changes very little with variations in pressure. However, flow rate management varies with the operating speed. Therefore, the pressure selection range is wide, and the flow rate can be selected by choosing different speeds to meet specific needs.
3. At higher fan speeds, the gaps between rotors and between rotors and the fan body are smaller, resulting in less leakage and higher volumetric efficiency. Our factory has strong processing and assembly capabilities, ensuring reasonable and uniform gaps, achieving not only high volumetric efficiency but also avoiding friction caused by thermal expansion.
4. The fan's structure results in minimal frictional loss. Because only the bearings and gear pairs have mechanical contact in their materials, the rotor, housing, and gear ring possess sufficient mechanical strength. Safe operation and long service life are the main characteristics of this blower product.
