Real-time monitoring and preventing method for surge and stall of axial flow fan
An axial flow fan, real-time monitoring technology, applied in pump testing, mechanical equipment, machines/engines, etc., can solve problems such as damage to fan equipment, unit safety, adverse effects on stable operation, and impact on the stability of boiler combustion conditions, and achieve combustion The effect of stable working conditions
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[0020] The left half of the performance curve of the axial flow fan has a saddle-shaped area. In this area, the flow rate, pressure head and power of the fan will fluctuate greatly, and the fan and pipeline will generate strong vibration and equipment operation noise. Abnormal working conditions such as significant increase are generally called "surge", and this unstable working condition area is called the surge area. like Figure 4 As shown in the Q-H performance curve of the axial flow fan, if the flow rate of the fan is reduced by the throttling adjustment method, if the working point of the fan is on the right side of the K point, the work of the fan is stable. When the flow rate of the fan is Q
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