Open the box and check whether all components of the fan are complete, whether there are any damages on the outside of the casing, especially pay attention to whether the head rectifier is damaged or deformed, whether the components are tightly connected, whether the blade motor is damaged, and whether the impeller rotates flexibly. If any problems are found, they should be repaired and adjusted. Check the installation foundation of the fan, which must have sufficient strength and rigidity to withstand the load during fan operation, and also check whether the connection size between the foundation and the fan meets the design requirements.
Installation matters
1. The horizontal installation of the fan is achieved by fixing the shock absorber to the fan base through connecting bolts, adjusting the horizontal height of each shock absorber with a center height adjustment pad, and fixing the fan to the welded connecting steel plate on the foundation with fixing bolts. If the fan does not require a shock absorber due to seismic reasons, the screw holes on the fan base can be directly connected to the embedded bolts on the foundation.
2. The basic requirements for installing side wall horizontal fans are the same as those for horizontal installation, except that the installation bracket is made into a diagonal arm support type, and the bracket must have sufficient strength and rigidity. This installation method is not suitable for fans above 10 #.
3. The suspension installation first connects the shock absorber and the fan with bolts to form a whole. The shock absorber is symmetrically installed and arranged on both sides of the center of gravity of the fan. The fan is directly lifted and inserted into the suspension bracket for installation. The height of the suspension bracket is determined by the user according to the actual spatial distance. This installation type is generally not used for fans above 16 #.
4. The vertical installation method of the fan is the same as that of the horizontal installation, with stricter requirements for the strength and stiffness of the fan foundation.
5. The connection between the fan and the two ends of the pipeline must use flexible joints to isolate vibration and protect the fan. [4]
debugging method
1. After the axial flow fan is installed, the flexibility of the fan rotation should be checked before starting, and the blades should be manually moved to check for any jamming or friction. Check if there are any remaining objects or other debris in the fan and adjacent pipelines.
2. Check if the air damper inside the pipeline is in the open state.
3. Personnel should stay away from the fan.
4. Start the fan and check if the direction of the fan blades matches the rotation mark. After passing the inspection, run it for 10-30 minutes before stopping. Check if the blades are loose and if the connecting bolts between the vibration damping seat and the base are loose. Only when everything is normal can it be officially started and put into operation.
operational check
When the axial flow fan is running, the main monitoring is the current of the motor. The current is not only a marker of the fan load, but also a prediction of some abnormal changes. In addition, it is necessary to regularly check whether the vibration of the motor and fan is normal, and whether there is friction or abnormal noise. Attention should be paid to checking whether the fan running in parallel is operating in a surge state. During normal operation, if the following environments are encountered, the machine should be stopped for testing:
1. Axial flow fan generates strong vibration or rubbing sound;
2. The motor current suddenly rises and exceeds the rated current of the motor;
3. The temperature of the motor bearing rises sharply.