The centrifugal blower makes noise
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This post was last edited by sxf1028102800 on 2015-1-1 at 15:28. There is a centrifugal blower used to supply air to the furnace. These days, the blower makes noise, with the sound occurring every few minutes and lasting for over 10 seconds; after that, it makes noise again after a few minutes. Could this phenomenon be caused by difficulty in supplying air to the furnace or by slight backflow of air? Please discuss actively – points will be awarded
No way, check whether the fan is operating within its designed range, and see if there are any loose components, especially the air inlets and outlets For reference only!
It seems that unstable back pressure is causing large fluctuations in the blower’s operating conditions; check to see if surge occurs momentarily
In centrifugal blowers, if the outlet pressure is too high and the flow rate decreases, this can cause surging in the blower, resulting in abnormal noises.
Resonance is caused by unstable back pressure or poor airflow in the flow channels. Check whether the blower impeller is eccentric
From a technical perspective, surge phenomenon seems to have occurred; current fluctuations are the most obvious sign, so it would be advisable to take a look. If surge occurs, it is advisable to appropriately increase the inlet pressure of the fan and reduce the outlet pressure.
Pressure fluctuations are likely to be surging! The poster can analyze the operating conditions before and after the failure, such as whether there have been any process adjustments recently and what the air volume was, etc.!