Regarding the turning of the impeller cover plate
Thread Content
Segmented multi-stage pumps retain the front and rear covers to prevent a decrease in pump efficiency caused by an excessive distance from the hub of the guide vanes； To avoid compromising the vapor-liquid separation effect, the self-priming pump also allows only the blade portion to be turned, with the front and rear covers remaining intact. So can I understand that, as long as the strength of the cover plate is maintained, all pump impellers should retain their cover plates while having their blades machined to ensure that the pump’s efficiency does not drop significantly? Why does it always seem that keeping the cover in place results in higher power consumption (or greater weight?) compared to removing it through turning? ）? Please ask the teacher to provide an explanation
Only the manufacturing companies understand this; we are just the users.