Corrosion and cracking issues of multi-stage centrifugal blower casings
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During the maintenance of the fifth-stage blower, a crack was found in the fourth-stage casing. Upon inspection, it was determined that the crack was caused by medium corrosion. Can it be operated without any treatment after being installed directly? What are the hazards of this crack to the operation of the equipment? Please ask an expert to help answer
This post was last edited by 3983596_FPPZ on 2018-10-16 09:19. It causes a reduction in the fan’s efficiency, lower air pressure, noise generation at the cracks, and an enlargement of those cracks; it is recommended to repair them by applying patches or performing riveting/welding on the outside of the fan. Additionally, look for similar signs of defects on the centrifuge and reinforce it in advance to prevent problems; it is not recommended to operate it while it has defects.
Just use it without any processing? Since it is known that the damage is caused by medium corrosion, even if there are no conditions for replacement, the cracks should be polished and repaired, or another layer of corrosion-resistant material should be welded on. Otherwise, the cracks will really get bigger, and the casing will be severely damaged; the risk is too high!
2mm cast iron is difficult to repair by welding.
Understood, I get it. It’s still best to get ready for the renewal and procurement of shell spare parts.
What medium? Temperature? Metal repair agents can be used for repairs, right! Check the operating conditions.
It can’t be welded; it’s okay to fasten a plate together with rivets instead
If you use it temporarily for a few days, it’s fine. But with such large cracks already present, continuing to use it will **shorten its lifespan and increase the risk of safety accidents. Please take precautions, OP :)