Impellers, spindles, and bearings should be inspected with special attention to detail

Before installation, the materials and tools for installation should be prepared first, and the components of each part of the fan should be inspected. Special and meticulous inspections should be carried out on the impeller, main shaft, and bearings. If any damage is found, it should be repaired, and then the interior of the bearing box should be cleaned with kerosene. During the installation process, the following points must be noted:
To prevent rust and reduce disassembly difficulties on some joint surfaces, lubricating grease or mechanical oil should be applied.
When connecting the bolts on the joint surface, if there are positioning pins, the pins should be installed first, and then the bolts should be tightened.
3. Check the inside of the casing and other casings to ensure that there are no remaining tools or debris that have fallen into them.
Installation requirements
When installing the fan, the weight of the gas pipeline should not be added to the casing. Correct the gap size between the air inlet and the impeller according to the drawing, and maintain the horizontal position of the shaft.
When installing the air inlet pipeline, the bolts of the air inlet itself can be directly used for connection. At this time, the fixing of the air inlet relies on three countersunk screws.
When the outlet is installed at a certain angle, the appropriate rotation of the rear disc can keep the plate in a horizontal position, and the flange surface of angle steel numbered 8-12 should be kept horizontal.
When installing type 8-12D fans, use a dial gauge and a measuring tape to measure the coaxiality of the fan spindle and motor shaft, as well as the non parallelism of the two ends of the coupling. The tolerance for non parallelism between the two axes is 0.05mm. The allowable deviation of non parallelism between the two ends of the coupling is 0.1mm.
5. After the installation of the fan is completed, use your hands or lever to move the rotor and check for any signs of tightness or collision. Only when there are no such signs can you try running.
6. After the installation of the motor, install the pulley or coupling guard. If the air inlet is not connected to the air inlet pipeline, it is also necessary to add a protective net or other safety devices (provided by the user). Install other components according to the drawing.
Therefore, when the motor capacity does not change, the spindle speed should not be changed. If the spindle speed increases, there is a risk of the motor being burned out due to overload.
The power of the motor used in the fan refers to the power required under specific operating conditions, combined with mechanical losses and the necessary reserve, rather than when the air outlet is fully open. If the outlet or inlet of the fan is not connected to pipelines or without external resistance, there is also a risk of the motor being burned out during idle operation. For safety reasons, valves should be added to the outlet or inlet pipelines of the fan. When starting the motor, close it. After running, slowly open the valve until the specified working condition is reached, and pay attention to whether the motor electrical flow rate exceeds the specified value.