NUST MISIS, Moscow, Russia

Dyak D. S., Post-Graduate Student
Rakhutin M. G., Professor, Doctor of Engineering Science, rahutin.mg@misis.ru

Moscow Polytechnic University, Moscow, Russia

Merzlyakov V. G., Professor, Doctor of Engineering Sciences

The article addresses the methods of energy efficiency enhancement of centrifugal pumps widely used in mining and in other industries. The methods aimed at reduction of hydraulic loss involve geometrical modification of impellers, surface treatment and hydrophobic coating. It is revealed that the change in the thickness and curvature of blades allows increasing the hydraulic efficiency by 6.5–26.5%, and the change in the number and in the arrangement of blades raises the hydraulic efficiency from 1.6 to 13% depending on the method being used. It is expedient to use the described methods together with the techniques which lessen roughness of flow passages in pumps.

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