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The difference between the forward centrifugal fan and the backward centrifugal fan

Nov 05, 2020

One of the differences: the output power (referring to how much work the object does in a unit time), the negative pressure head used to get rid of the frictional resistance of the system software, the forward centrifugal fan is lower than the backward centrifugal fan.

The centrifugal fan of the smoke purification and exhaust system is a mechanical device that uses the typed mechanical kinetic energy to increase the working pressure of the gas and send the gas in parallel. It is a driven power machine.

Centrifugal fans are the habitual general term for gas reduction and gas delivery equipment in our country. Centrifugal fans often referred to include centrifugal fans, centrifugal blowers, and wind energy generators. Because the channels in the backward-leaning-leaf centrifugal fans expand slowly, they The output power damage is lower than the forward tilting type, so the high efficiency of the forward tilting centrifugal fan is less than that of the backward tilting centrifugal fan.

The second difference: electromagnetic energy consumption costs, because the high efficiency of forward-inclined centrifugal fans is less than that of backward-inclined centrifugal fans, so the electromagnetic energy consumption costs are more than that of backward-inclined centrifugal fans.

The third difference: noise, the operating noise of forward-inclined centrifugal fans is higher than that of backward-inclined centrifugal fans.

When the centrifugal fan of the smoke purification and exhaust system starts to work, the vibration of the rolling bearing position is not large, but with the extension of the running time, the smoke and dust in the centrifugal fan will adhere to the impeller unevenly, and slowly destroy the rotor movement of the centrifugal fan. Balance, so that the vibration of the rolling bearing increases slowly. Once the vibration reaches the maximum allowable value of 11mm/s for the centrifugal fan (below the larger control value indicated by the vibration amplitude), the centrifugal fan must be shut down for maintenance.

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