Effect of surface roughness on the performance of centrifugal pump impellers
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These days, there is much discussion about using surface coatings on centrifugal pump impellers to save energy and improve efficiency. I would like to ask whether, under theoretical conditions, the roughness of the impeller surface should be as low as possible; and what would happen to the pumping performance if it were reduced to its absolute minimum?
““Centrifugal ten pumps” – “Pumps”, heheh. It’s an opportunity to learn something new here; I looked up the explanation on Baidu, but I’m not sure if it’s correct. “Pump” is the transliteration of the English word “pump”, and this term is still used in a few fields such as vacuum technology. ”It turns out to mean pump; if P means this, then the question that follows can be answered affirmatively – \"Is it true that the roughness of the impeller surface should be as low as possible?\" However, if the equipment is to be taken to such an extreme level, the cost of the equipment must be considered. Coating treatment for ordinary pumps considering energy savings,,,,, Hehe, these days many people sell such products under the guise of energy savings in order to make a profit. He doesn’t mention things like the hardness of such layers, their lifespan, cost, or the energy wasted due to their weight on the impeller: lol
Haha, it reminds me of the first time I heard the term “turbine” – I was completely confused! As a result, the experienced expert told me many things about the origins and meanings of those foreign loanwords, as if he were telling a story; such lessons are interesting and not boring at all!
Haha, the centrifugal process turned into something like “centrifugy-ten” – what a mistake. Thank you for the advice!
If it’s just about roughness, the impeller is machined in one go. Performance can be improved theoretically. But if the efficiency is already 80%, how much more can it be improved?
Generally, after being in use for a while, coating is applied when cavitation on the impeller surface causes an increase in roughness.