When the axial fan is started, the current of the motor will be 5-6 times higher than the rated value, which will not only affect the service life of the motor, but also consume more electricity In the design of the system, there will be a certain margin in the selection of the motor. The speed of the motor is fixed, but in the actual use process, sometimes it needs to run at a lower or higher speed, so it is very necessary to carry out frequency conversion transformation. The frequency converter can realize the soft start of the motor, achieve the purpose of energy saving and speed regulation by changing the input voltage frequency of the equipment, and can provide the equipment with over-current, over-voltage, overload protection functions.
Maintenance of axial flow fan
1. The use environment should always be kept clean, the fan surface should be kept clean, there should be no debris at the air inlet and outlet, and the dust and other debris in the fan and pipeline should be removed regularly.
2. It can only operate under the condition that the fan is completely normal. Meanwhile, it is necessary to ensure that the capacity of the power supply facilities is sufficient and the voltage is stable. It is strictly prohibited to operate with defects. The power supply line must be a dedicated line,
3. In case of abnormal sound, serious heating of motor, charged shell, tripping of switch and failure to start, the fan shall be shut down for inspection immediately. In order to ensure safety, it is not allowed to carry out maintenance during the operation of the fan. After maintenance, the test run should be carried out for about five minutes, and the machine can be started again after confirming that there is no abnormal phenomenon.
4. According to the use of environmental conditions, the bearing grease should be supplemented or replaced from time to time (the motor closed bearing does not need to be replaced within the service life). In order to ensure good lubrication during the operation of the fan, the number of oil filling should not be less than 1000 hours / time. The zl-3 lithium-based lubricating grease should be used to fill 1 / 3 of the inner and outer rings of the bearing. It is strictly forbidden to run without oil.
5. The fan should be stored in a dry environment to avoid moisture on the motor. When the fan is stored in the open air, there should be defensive measures. In the process of storage and handling, the fan should be prevented from collision to avoid damage to the fan. Temporary lines should not be used for long-term power supply.