The flow-through components of centrifugal pumps are: suction chamber, impeller, and press-out chamber. The impeller chamber is the core of the pump and also the core of the flow components. The pump works on the liquid through the impeller to increase its energy.
Classified according to the direction of liquid outflow
The impeller is divided into three categories according to the direction of the liquid outflow:
(1) Radial flow impeller (centrifugal impeller) The liquid flows out of the impeller in a direction perpendicular to the axis.
(2) Diagonal flow impeller (mixed flow impeller) The liquid flows out of the impeller along the inclined direction of the axis.
(3) The direction of liquid flow in the axial flow impeller is parallel to the axis.
Classified by way of inhalation
The impeller is divided into two categories according to the way of inhalation:
(1) Single suction impeller (that is, the impeller sucks liquid from one side).
(2) Double suction impeller (that is, the impeller sucks liquid from both sides).
Classified by cover form
The impeller is divided into three categories according to the form of the cover:
(1) Closed impeller.
(2) Open impeller.
(3) Semi-open impeller.
The enclosed impeller is widely used. The aforementioned single-suction impeller and double-suction impeller all belong to this form.
