淮北电厂#5炉系DG 670/140—4型燃煤锅炉,采用钢球磨中间粉仓热风送粉系统。原用16台DX—3A型给粉机,叶轮直径φ386毫米,下粉角150°。每台出力4～12吨/时,配JZT系列滑差电机,调速范围115～1200转/分。锅炉额定负荷时总燃料消耗量是108.6吨/时,扣除三次风带粉10～15%,平均每只给粉机流量大约是6吨/时。这样,给粉机将经常在300～400转/分的低转速范围内运行,而JZT系列滑差电机在低速范围内存在失控现象,使 Huaibei Power Plant # 5 furnace DG 670 / 140-4 type coal-fired boiler, the use of steel ball mill intermediate powder warehouse hot air feeding system. The original 16 DX-3A-type powder machine, impeller diameter φ386 mm, the powder angle of 150 °. Each output 4 ~ 12 tons / hour, with JZT series slip motor, speed range of 115 ~ 1200 rev / min. The total fuel consumption of the boiler rated load is 108.6 tons / hour, minus 10 to 15% of the three times the wind with a powder, the average flow to each machine is about 6 tons / hour. In this way, to the powder machine will often run at low speed range of 300 ~ 400 rev / min, and JZT series slip motor in the low speed range of loss of control, so that