Problems to be noted in the transformation (1) The success of the wind turbine transformation depends on whether the original performance provided before the transformation is accurate and whether the performance after the transformation can meet the needs of the process system. The transformation of the fan is often to change the performance of the fan when the pipe is not changed in the original system pipe network. Therefore, when considering changing the local resistance change in the pipe network, the flow velocity change in the pipe due to the change of the flow rate should also be considered, so that the system resistance changes. The specific changes are as shown in the figure, due to the change of the pipe network characteristic curve and the performance of the fan, the operating point moves from point A to point B. Through the relationship between the total resistance of the pipe network and the gas flow through the pipe network p=KQ2 (K is determined by the system), the actual pipe network can be accurately calibrated to determine the drag coefficient K and the actual operating temperature and density of the fan. Then, the system resistance is determined by the changed flow rate, and the performance of the final modified fan is proposed. (2) Due to the modification of the fan, only for the fan impeller, when the motor of the original fan is not changed, the shaft power and moment of inertia of the fan should be checked in detail. If necessary, the de-weighting method can be adopted to make the rotational inertia after the transformation close to the original rotor moment of inertia, so as to meet the requirements of the motor. (3) After the transformation, the fan impeller, main shaft, and casing should be checked, and the strength indexes after the transformation should be met. (4) Check the auxiliary machines (such as electric actuators, hydraulic couplers, etc.) equipped with special fans to meet the requirements of the auxiliary machines after the transformation and the technical requirements of the system. 5) Due to the change of the internal flow channel size of the fan after the transformation, the internal loss of the fan is increased. It is recommended that the fan flow after the transformation has a margin of 1.051.1, and the wind pressure has a margin of 1.031.07. When the performance is reduced after the transformation, take a small value; when the performance is improved after the transformation, take a large value. Original fan performance: fan volume flow Q=135000m3/h fan full pressure p=3740Pa working temperature T=200 fan speed n=1450r/min motor power N=220kW After the user requires modification, the system flow reaches 1400000m3/h, the casing, The air inlet, drive train, motor and electric actuator are not changed. Through the calibration of the existing pipe network, it is determined that Q=129567m3/h, p=1847Pa, and the pipe network resistance coefficient K=1426 is determined. According to p=KQ2, Q=140000m3/h, the pipe network resistance is calculated to be 2157Pa. Dc Submerged Arc Furnace,Energy Saving Dc Submerged Arc Furnace,Dc Metal Silicon Furnace,Dc Ferrosilicon Furnace ANYANG YOUNENGDE ELECTRIC CO.,LTD , https://www.younengde.com