Hunan centrifugal fan Low priced wholesale sales, blade mounting angle

Edit: wind Standard Electrical fan experts more price and specifications please visit Ali's official website: http: //fbemf2014.1688.com So, from the energy point of view, in the same blade angle, the axial fan should not be used adjust throttle valve to reduce air flow method. 3.2.2 change the blade angle adjustment method and its application axial fan blade mounting angle is generally adjustable in different blade angles, the different fan performance curve, manufacturers generally are given performance under different blade angles curve. The ventilation network characteristic curve drawn on the fan performance curve, and static pressure performance curves intersect at different angles, according to the mine air volume required, the blade mounting angle is adjusted to the desired angle [9]. Changing the mounting angle of the fan blades can be air pressure, air volume regulation, however, the use of the method of adjusting the fan operating point will be changed, will change the efficiency of the fan, fan efficiency may make after adjustment reduced, resulting in waste of energy. Therefore, when selecting the method to adjust the fan operating conditions, should consider the specific circumstances of the selected fan performance and mine ventilation. According to the energy requirement, if using this method adjusted so that fan efficiency drops even larger decline, it should not use this method of adjusting conditions. The following Figure 2 illustrates the application of this adjustment method is reasonable. Figure 2, a mine use FBCDZNo26 / 355 × 2 fan ventilation curve in Figure 1 for a period of mine ventilation network graph, in order to increase the amount of wind, the need to adjust the operating point from M1 to M2, by changing the blade mounting angle method, the blade mounting angle from 46 ° / 38 ° adjusted to 49 ° / 41 °, can be seen from the figure, the static efficiency operating point M1 82%, static efficiency operating point is 85 M2 %, static efficiency of about 3%, to certain energy-saving purposes. 2 is a graph in Figure 2 of another mine ventilation network graph given period, in order to increase the amount of wind, the need to adjust the operating point from M3 to M4, can be seen from Figure 2, the static efficiency operating point M3 is 82% M4 static efficiency operating point close to 75%, after adjusting static efficiency decreased by about 7%, not only fail to save energy, and waste of energy, especially for high-power fan will result in greater energy waste, so should not be using this adjustment method.