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龙烟铁矿对黄田五区的一台70B_2-21 No18主扇进行改造后,风机工况点效率由原45％提高到72.6％,年节电可达39万度,而且投资少、施工容易。该区工况点的流量系数(?)=0.25,压力系数(?)=0.14,适合于单级运行。为此,我们在不改变轮毂比和风轮叶片数的前提下,将原风机第一级风轮的叶片拆除,割去22片弧形中导片,焊上7片薄钢板制作的支撑叶片,再将第二
Longyan Iron Mine on the Huangtian District 5 a 70B_2-21 No18 main fan after transformation, the fan operating point efficiency from the original 45% to 72.6%, the annual power savings of up to 390,000 degrees, and less investment, easy construction . The flow coefficient (?) = 0.25 and the pressure coefficient (?) = 0.14 for the operating point in this area are suitable for single-stage operation. To this end, we do not change the hub ratio and the number of wind turbine blades under the premise of the first stage of the original fan wind turbine blades removed, cut 22 arc-shaped guide plate, welded on the seven thin steel plate support blades, Then second