What is the difference between the safe operation of the main fan and an emergency shutdown?
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What are the static blade angles and why?
I don’t understand your question. If the stationary vanes are adjustable, their angle during operation should be adjusted according to the specific operating conditions (the angle of the stationary vanes, and thus the operating curve of the fan, is adjusted based on the actual flow rate and pressure) ； The details are complex and hard to explain. ). In the event of an emergency shutdown, the first step should be to cut off power to the main motor, rather than trying to adjust the static blades first. If the adjustment mechanism for quiet operation is powered, it may be adjusted to the off state to facilitate startup under low load next time.