What are the types of pump impeller, as well as the use and advantages?
The impeller of the centrifugal pump is to transfer the energy of the prime mover to the liquid in the pump through the action of centrifugal force, so that the liquid increases speed and pressure, and the liquid in the pump is discharged, and the liquid in the inlet pipe is sucked in.Impeller commonly used materials are: cast iron, HT20~40, HT25~47, cast steel, ZG15, ZG25, cast copper, ZGCuR, stainless steel, 1Cr13, 2Cr13, 1Cr18Ni9Ti, but also useful aluminum cast iron.
Centrifugal pump, semi open impeller, open impeller, closed impeller, self-priming pump, closed impeller, semi open impeller, open impeller, blowdown pump, open impeller, semi open impeller, closed impeller,
The impeller according to the structure can be divided into four forms: the first form, is composed of a front cover, a back cover, a blade and a hub, called closed impeller (figure a); second kinds of forms, composed of a back cover, a blade and a hub, called semi open impeller (figure b); third kinds of forms. Composed of blade and hub, called open impeller (Figure C); fourth, 7 by the two front cover, blade and hub, with two in two on both sides of the inlet, called double suction impeller (Figure D).Semi open and fully open impeller is often used to transport more liquid containing impurities. Double suction impeller is often used in occasions with large displacement. It has good cavitation resistance and high efficiency.
