When moving, the distance between the vanes increases sample axial fan blades, as will the role of sound barrier decreases with increasing distance from the impact of the bit stream is reduced when interference effects than wake speed changes faster. Thus axial fans specifications, at least three parameters that affect the size of the interference noise: blade shape velocity waveform (ie blade loading), leaf area away from the radiation source and the sound of the blades as between columns. Very small pitch may have two acoustic impact. If the vanes on the rotor blades interference field force established to make the rotor blades into a pulsating sound source, while the leaves are still sound barrier. Blower fan found abnormal noise during operation, the motor severe fever, live shell, switch trip, you can not start and so on, should immediately stop checking. To ensure safety, do not allow the fan running repairs, maintenance should be carried out after the commissioning of five minutes or so, confirming that no anomalies start running again. According to from time to time to supplement or replace the bearing grease (motor enclosed bearing service life without replacing the grease) axial fans installed in order to ensure the fan is running good lubrication, refueling times less than under ambient conditions 1000 Hours / closure of bearings and motor bearings, fuel zl-3 with lithium grease filling 1/3 of the bearing inner and outer rings; non-axial fan running short of oil pricing, axial fans, ventilation equipment from Shandong Dezhou Plumper Plumper ventilation plant available. Dezhou Plumper ventilation plant (www.frtfsb.com) (www.frtfsb.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Plumper ventilation equipment into the brilliant and you work for a better future!