Who can help me analyze the reasons for the fluctuations in the speed of the gas blower?
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The gas blower at the facility has been experiencing sudden fluctuations in its speed these past few days; it seems to be out of control, and the operators report that the actual speed is fluctuating! I checked the blower’s speed sensor – it’s firm and reliable! 2. The shielding check is normal; no large electromagnetic devices have been activated or are rotating in the vicinity. 3. The body vibration is moderate, with no significant shaking. The only thing is that the insertion angle of the probe hasn’t been adjusted, as it’s currently in use; I didn’t have the courage to try doing that. Could that guy help me analyze it? Thank you again
Reply 1# I don’t know what kind of fan the original poster is referring to; does it have automatic adjustment? Is it still manually adjusted? Under normal conditions, the fluctuations in the fan’s operation are not significant; they are generally affected by changes in gas flow rate, pressure, and suction, but these fluctuations are not large. In the event of large fluctuations, first check whether there is a mechanical issue; if there is automatic adjustment, then verify whether there are errors in the signals that cause such fluctuations.
Are the data displayed by the probe accurate? Our factory’s vibration probes have encountered similar problems, which caused the fans to stop operating in a cascade manner. Upon analysis, it was found that the issue lay with the probes, resulting in distorted data.
Blowers that use hydraulic couplings for speed control may experience this issue; it is estimated that the looseness of the scoop tube in the hydraulic coupling is to blame
Could it also be fan surge caused by pressure fluctuations in the pipeline?
I can give you a definite answer: this kind of thing has indeed happened in my factory. This is because fluctuations in the gas consumption by the main pipeline user cause fluctuations in the overall pressure of the pipeline! Fluctuations in the main pipe pressure will cause fluctuations in the fan outlet pressure, and these fluctuations may be even more severe! Changes in the outlet pressure of the fan cause fluctuations in its speed! This is because there is a soft connection between the motor and the fan, rather than a hard connection!