Daily maintenance of fan:
Correct maintenance is an important guarantee for the safe and reliable operation of the fan and the improvement of its service life. Therefore, in the use of fans, we must pay full attention to.
Fan is a kind of driven fluid machinery, which depends on the input mechanical energy to improve the gas pressure and discharge gas. The blockage of fan will directly affect the operation of the whole mechanical process, so its maintenance is very important
The impeller is the rotating part of the fan, whose function is to transport the gas to the outlet through the fan. For example, it consists of a rear disc, a straight front disc with an inlet ring and blades. The blade is composed of arc plate blade with larger curvature radius. At the initial stage of impeller operation and all regular inspections, whenever there is an opportunity, it is necessary to check whether the impeller is reliably fixed on the shaft shoulder, and whether there are cracks, wear, dust accumulation and other defects in the impeller. Whenever possible, the impeller must be kept clean, and the dust and rust on it must be removed by wire brushing regularly. Because with the increase of running time, the dust can not be evenly attached to the impeller, resulting in impeller balance damage, resulting in rotor fluctuations.
As long as the impeller is repaired, it needs to be re balanced. Before balancing, it is necessary to check whether all fastening bolts are tightened. Because the impeller has been running in the unbalanced state for a period of time, these bolts may have been loose.
Check the axial position of the impeller according to the installation layout of the fan and the size of the collector inserted into the impeller inlet ring. Check the radial clearance between the collector and the impeller inlet ring. If necessary, adjust the collector or casing to get the correct clearance space. So as to ensure that the side plate of the casing intake box is aligned in the correct position relative to the spindle and the spindle seal. Check and ensure that the inlet and outlet end positions of the casing and inlet box meet the requirements of drawings and connecting pipes.
When the bearing lubricating oil is in normal use, it should be replaced at least once in half a year. When it is used for the first time, it should be carried out after about 200 hours of operation. The second oil change should be carried out after 1-2 months. After that, the lubricating oil should be checked once a week. If the lubricating oil is not deteriorated, the oil change can be extended to 2-4 months. The specified brand of lubricating oil must be used when replacing (as specified in the general drawing) The old oil in the oil tank should be thoroughly drained and cleaned before filling in the new oil.
Before starting the fan, clean the foreign matters inside the fan, check whether the spindle is loose and whether the opening device is abnormal;
2. Check the tightness of the fan belt every week, adjust the position of the large and small pulleys, and keep them on the same horizontal plane;
3. When the fan is running, check whether the fan has abnormal sound, check that the opening angle of the shutter is less than 90 degrees, and clean the dust of the shutter every day, so as to avoid serious air leakage caused by the loose cover of the shutter and affect the work efficiency.
4. Check the working order and state of the fan according to the working indication state of the temperature controller.
