Multistage pump impeller positioning
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Why is there a gap A between the last-stage impeller and the balance drum of Galit Ebara's 6-stage centrifugal pump? If so, wouldn't the last-stage impeller have no axial positioning?
refer to this https://bbs.hcbbs.com/thread-1325953-1-1.html
Thank you very much, that is the reserved gap for thermal expansion.
This post was last posted by 3983596_FPPZ edited personal opinion on 2021-11-10 09:38: It is not a reserve for thermal expansion, because the degree of thermal expansion between dynamic and static parts of this type of pump is the same, so it is not the reason, at least this is not the main reason, but a reserve for the accumulation of machining errors of rotating parts (especially when there are many stages)