DK62 mine axial fan

DK62 DK62 mine mine axial fan axial fan according to the first part of the selection than the calculated number of revolutions, to select DK62 mine axial fan models and determine whether its corresponding point in the high zone, as in the high zone, then according to the corresponding flow coefficient and pressure coefficient to preliminary calculations fan machine number. Here, DK62 mine axial fan selection ends the second part, check the ratio of the number of revolutions, choose efficient fan model, crude computer number is the key to this section. Compressibility of gases for DK62 mine axial fan selection effects. [1] indicates that: "In the fan, if the flow velocity at any point are less than 100m / s, ie Mach number M <0.3, you can ignore compressibility effects, as incompressible fluid treatment, Ventilator, Since M is generally less than 0.3, so the subsonic low-speed zone. " See from, DK62 mine axial fan does not consider the compressibility can be. But the literature [1] and that "sometimes in order to improve the accuracy of the calculation, the Mach number M> 0.2, you need to consider changes in the density of computing power and other effective correction." Visible if the Mach number M> 0.2 centrifugal fan performance can be considered for amendment. When the actual fan calculation process, some big machine number, high speed, high pressure centrifugal fan considering compressibility of gases, such as 9-28№18.5D fan, which reduces the half gauge number, 9-28 №18D can meet the conditions required. But I think the fan actual operation, when the field operating conditions can also be adjusted by adjusting means, and consider changes in compression performance, machine number of fans around is not large, so the impact of the centrifugal fan gas compression can be ignored Excluding. According to the known density, speed, model, and the rough calculation over DK62 mine axial fan machine number round, taking advantage of the software point mapping function can express the fans are dimensionless performance curves, while calibration fan operating point. There may also be listed dimensional performance table, the location of the operating point calibration. Further according to the actual operating conditions performance is obtained within the power of the fan. Here, DK62 mine axial fan selection process is completed, calculate the fan shaft power and select the drive means is omitted here. It is worth mentioning that the same conditions the performance of different manufacturers, the results of different techniques may not be the same person elected. This is usually caused by daily selection of experienced technical personnel and decisions based on their own business most of the existing models may elect good fan. In DK62 bid Mine axial fans, fans who choose the most efficient, energy-saving, simple process and low cost will come exclusive advantages.