Difference between fan and blower
2021-03-30 16:48:03
1. Fan < br / >
Fan is a kind of mechanical driving fluid, it depends on the mechanical energy input to improve the gas pressure and exhaust gas.
Ventilators are widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings for ventilation, dust removal and cooling, and in boilers and industrial furnaces for ventilation and induced draft
Cooling and ventilation of air conditioning and household appliances; drying and selection of grain; wind source in wind tunnel and inflation and propulsion of hovercraft.
The working principle of the fan is basically the same as that of the turbine compressor, but due to the small gas flow and small pressure change, it is generally not necessary to consider the change of gas specific volume, that is, the gas is regarded as an incompressible fluid.
2. Blowers < br / >
Under the design conditions, the fan with air pressure of 15kpa ~ 0.2MPa or compression ratio of E = 1.15 ~ 3 is called blower
Characteristics: < br / >
Because the impeller runs in the valve body without friction and lubrication, there is no oil in the exhaust gas. It is an ideal gas source for chemical industry and food industry.
2 blower is positive displacement blower. When used, the flow rate changes little with the pressure. But the flow varies with speed. Therefore, the selection range of pressure is very wide, and the selection of flow rate can be realized through the selection of speed.
Three. The higher the fan speed is, the smaller the gap between rotor and rotor is, the smaller the leakage is, and the higher the volumetric efficiency is. Our factory has powerful processing and assembly technology, which can ensure reasonable and uniform clearance, achieve high volumetric efficiency, and avoid friction due to thermal expansion of the body.
The structure of 4 blower determines that its mechanical friction loss is very small. Because only the bearing and gear pair have mechanical contact, the rotor, shell and ring gear have enough mechanical strength in material selection. Safe operation and long service life are the characteristics of fan products.
