1. When the centrifugal fan has stopped, close the main gate of the fan, notify the electrical personnel to remove the temperature, vibration and other electrical equipment connected to the centrifugal fan on the fan, mark it well, and keep it properly.
2. Disengage the coupling, remove the positioning pin on the flange of the fan casing, and remove the bolts.
3. Remove the connecting bolts between the bearing seat and the upper half shell of the fan, and lift the upper half shell with a crane; The components inside may be damaged.
4. Check backward one by one from the coupling end to check whether there is any damage to the parts, and whether there is any deviation in size and clearance. Record any problems found, and then mark the position of the entire rotor in the fan, including the various components in the front and rear bearing housings, and finally lift out the rotor.
5. Clean the bearing seat after taking out the rotor, check for wear, and measure the upper and lower bearing seat halves together to check whether it is still within the tolerance range. If there are obvious scars or exceed the tolerance range, replace it in time.
6. If the bearing parts, such as: bearings, positioning rings, sealing bodies, sealing rings, end covers, etc., replace that one if there is a problem.
7. After replacement, reinstall according to the pre-disassembly mark, ensure the sequence and position are correct, and then assemble the whole machine.
8. Fill the bearing with lubricating oil.
9. Check that the cavity of the upper and lower casings is clean and free of debris, the seals at all levels are installed in place, the upper and lower marks are the same, the lower half of the bearing seat is installed on the lower half of the casing, then the rotor is transferred, and oil is added to the oil chamber, and the bearing seat is finally installed In the first half, put on the positioning pins to tighten the bolts, and install the front and rear end covers.
10. Manual cranking, check whether it is flexible, whether there is any scratches, if there is no problem, finally install the upper half shell, put on the positioning pin to tighten the bolts, and install the coupling to start the test run.
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