When the axial flow fan starts, the current of the motor wll be 5-6 times higher than the rated value, which wil not only affect theservice life of the motor but a1so consume more power. The system will have a certain margin in the motor selection during the design, Thespeed of the motor is fixed, but in actual use, sometimes it needs to run at a lower or higher speed, so it is very necessary to carry outfrequency conversion transformation, The frequency converter can realize the soft start of the motor, achieve the purpose of energy savingand speed regulation by changing the input voltage frequency of the equipment, and can provide the equipment with protection functionssuch as overcurrent, overvoltage, and overload.

Maintenance of Axial Fan

1. The operating environment should be kept clean and tidy. The surface of the fan should be kept clean. There should be no debris atthe air inlet and outlet. The dust and other debris in the fan and pipeline should be cleaned regularly.

2. The fan can only be operated under normal conditions, At the same time, it is necessary to ensure that the power supply faciltieshave sufficient capacity and stable voltage. Defective operation is strictly prohibited. The power supply line must be a dedicated line

3. During the operation of the fan,it is found that the fan has aonormal sound, the motoris seriously heated, the shell is electrfied, theswitch is tripped, and it cannot be started. It should be shut down immediately for inspection. In orderto ensure safety, maintenance is notallowed during the operation of the fan.After the maintenance, a trial run should be carried out for about five minutes to confirm that there isno abnormal phenomenon before starting the operation.

4. Iregularly add or replace lubricating grease to the bearings according to the environmental conditions of use (the motor closedbearing does not need to replace the lubricating grease during the service lfe),In order to ensure g0od lubrication of the fan duringoperation, the number of refueling shall not be less than 1000 hours/ The bearings and motor bearings are sealed, and 1/3 of the inner andouter rings of the bearing are filled with zl-3 ithium-based lubricating grease;it is strictly forbidden to run out of oil

5. The fan should be stored in a diry environment to prevent the motorfrom getting damp. When the fan is stored in the open air, thereshould be defensive measures., The fan should be prevented from bumping during storage and handling to avoid damage to the fanTemporary power lines should not be used for a long time.