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Precautions when servicing the circulation fan
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Publication time:
2018-05-16
Proper maintenance is an essential guarantee of the safe and reliable operation of a circulating fan, and it also helps extend its service life. Therefore, when using circulating fans for tobacco drying, it is crucial to pay adequate attention to them. At the initial stage of operation of the impeller and during all routine inspections, whenever possible, the impeller should be examined for defects such as cracks, wear, and dust accumulation. If feasible, the impeller should be kept clean and regularly brushed with a wire brush to remove dust and rust deposits. Over time, this accumulated dust may settle unevenly on the impeller, disrupting its balance and causing rotor vibrations. After repairing the impeller, it must be dynamically rebalanced. If conditions permit, a portable balancing device can be used to perform balancing directly on-site. Before carrying out dynamic balancing, it is essential to check that all fastening bolts are properly tightened. "Since the impeller has been operating in an unbalanced condition for some time, these bolts may have become loose." Apart from regular inspections of the internal parts of the housing and the suction chamber for severe wear and removal of heavy dust deposits, no other special repairs are required for these components. Regularly verify that all fastening bolts are securely tightened. In fans equipped with compression bolt assemblies, press the butterfly spring on the support until it reaches the installation level indicated in the drawing. During maintenance of the bearing assembly, the supply of lubricating oil to the bearings is often checked. If oil leakage is observed in the housing, slightly tighten the bolts on the end cover. If this does not suffice, it may be necessary to replace the sealing gasket with a new one. Maintenance of other auxiliary equipment, including motors, electric drives, instruments, and measuring devices, is described in detail in their respective operating manuals. These operating manuals are provided by various manufacturers of auxiliary equipment, and our manufacturer will deliver these manuals to users in random packaging. Repair and maintenance of high-temperature circulating fans when they are out of service: When the fan is not in use and the ambient temperature drops below 5 ℃, any residual water in the equipment and pipelines should be drained to prevent damage to the equipment and pipelines due to freezing. Maintenance of tobacco-drying circulating fans during prolonged shutdown and storage: Cover the surfaces of bearings and other key components with anti-corrosion oil to prevent corrosion. The rotor of a high-temperature circulating fan used for tobacco drying should be manually rotated by half a turn (that is, by 180°) approximately every two weeks. Before rotating the rotor, the end of the shaft should be marked so that the original top point becomes the lowest point after the rotor is moved.
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