Multi-stage residue pump
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This post was last edited by gaodi913 on 2015-12-14 at 11:39. It involves a multi-stage pump; the medium used is residue oil. The front and rear bearings, seals, and thrust plates were removed, leaving only the large cover at the drive end. The rotor could not be pulled out, but after removing the front cover, the rotor was easily extracted. Some colleagues suggested that a vacuum condition or the adhesive properties of the residue oil might be to blame – is that the case?
So much has been removed already, and the vacuum still hasn’t been broken?
If it’s due to residue adhesion, can it be detected by core pulling?~~
The residue has a high pour point, so the pump generally requires insulation and heating; perhaps it wasn’t emptied completely during maintenance?