The impeller bearing of the circulating water pump is stuck and cannot be removed; seeking help from experts? ? ?
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As the title suggests, we have a circulation water pump model 7100. During this maintenance task, after removing the pump casing, it was found that the bearing of the pump’s impeller was stuck; it couldn’t be lifted using a crane, so it was impossible to remove it. We’re not sure how to take out the impeller bearing now – any advice from experts would be appreciated ? ? As for how the bearing can lock up, thousands of words are omitted here!
Use gas cutting to separate the outer and inner rings of the bearing, then lift the entire water pump with a crane.
In such situations, when it’s determined that the component cannot be removed, my advice to you is: destroy the one that incurs the least cost!
Replace the cutting blade on the handheld grinder; the calorific value has a minor impact on other accessories. I’m not sure what size the bearings are – will it be possible to cut with it? If that doesn’t work, then cutting will be necessary; make sure to shield and cool down the other components.
For a circulation water pump with a capacity of 7100 m3/h, a double-suction pump is generally used; the pump casing is of split-type, and the bearing housings are connected to the pump body via bolts. Based on the owner’s description, it seems the intention is to lift out the rotor in order to replace the bearings. If the rotor cannot be lifted after opening the pump casing, it is likely that the sealing rings on both sides of the impeller have rusted. Try using a hand winch to apply force, and also try hitting it with a hammer (provided that the bolts connecting the bearing housing to the pump body have been removed first).
All the bolts have been removed; at the area where the impeller is supported, it’s stuck in place and cannot be pulled out even with a crane. Now I’m going to soak it in acid to see if it can become fluffy.
Soaking in acid doesn’t have much effect; knocking on the support ring to make it rotate yields better results.
With such severe damage to the shaft, it’s likely damaged beyond repair; first use gas cutting to cut the shaft in half, lift out the impeller, and then examine the bearings at both ends
Is the bearing housing of this pump also horizontally split? Remove the upper cover by tapping it with a hammer to loosen it; if that doesn’t work, then cut the bearing. In any case, the bearing needs to be replaced. As a last resort, cut the shaft.
Destructive demolition – choose the option with the lowest cost