What should be noted in the daily maintenance of the fan of a laminar flow sampling vehicle?

The daily maintenance of the fan of the laminar flow sampling vehicle should pay attention to the following aspects:
Check the fixation condition: Regularly inspect whether the fixing bolts of the fan are loose, especially after the sampling vehicle has moved or been jolted. If loose bolts are found, they should be tightened in time to prevent the fan from shifting or being damaged due to vibration during operation.
Clean the surface of the fan: Regularly clean the dust and dirt on the surface of the fan casing. You can use a clean soft cloth to wipe it. For some stubborn stains, a mild cleaner can be used, but it is necessary to avoid the cleaner flowing into the interior of the fan.
Clean the dust on the impeller: Dust accumulation on the impeller can affect the air volume and speed of the fan. It is necessary to open the fan casing regularly and use a soft brush or vacuum cleaner to clean the dust on the impeller. Be careful not to collide with the impeller during operation to avoid deformation.
Check the wear of the impeller: Observe whether the impeller blades have any wear, cracks deformations, etc. If there is slight wear and tear, it can be repaired. If the wear is severe, the impeller should be replaced in time to ensure the normal operation of the fan.
Lubricate the bearings: By the requirements of the fan's user manual, add appropriate lubricating oil to the bearings regularly. Generally speaking, after running for a certain number of hours (such as 2000-3000 hours), the bearings need to be lubricated to reduce friction, lower noise, and extend the service life of the bearings.
Check the motor: Inspect whether the wiring of the motor is loose and whether there is any overheating, strange smell abnormal noise, etc. If any, the machine should be stopped immediately for inspection. Only after the fault is eliminated can it be used again. Meanwhile, regularly measure the insulation resistance of the motor to ensure its good insulation performance.
Test wind speed: Use an anemometer to regularly measure the wind speed at the fan outlet to ensure it is within the specified range. If the wind speed is abnormal, it may be caused by reasons such as fan failure or filter blockage. It is necessary to promptly investigate and solve the problem.
Record the operating status: Establish a maintenance record file for the fan, documenting the time, content, replaced parts of each maintenance, and the operating status of the fan, etc. Through the analysis of these records, potential problems can be identified promptly and maintenance measures can be taken in advance.