What Are The Structural Characteristics Of A Clear-water Centrifugal Pump?

1. The clear-water centrifugal pump is primarily composed of a bearing housing (suspension), pump casing, pump cover, impeller, seal rings, and shaft.

2. The axial seal assembly consists of a gland, a packing ring, and packing material; this arrangement prevents air ingress or excessive water leakage.

3. The pump is driven by an electric motor connected via a spacer-type flexible coupling. Viewed from the drive end, the pump rotates in a clockwise direction.

4. To prevent shaft wear, the pump is equipped with a shaft sleeve that protects the shaft within the stuffing box. An O-ring is placed between the sleeve and the shaft to prevent air ingress or leakage along the mating surface.

5. To balance axial forces, most pumps feature seal rings at both the front and rear of the impeller, along with balance holes in the impeller's rear shroud. However, for pumps with lower axial forces, seal rings and balance holes may be omitted from the rear of the impeller.

6. The pump casing (comprising the pump body and cover) forms the working chamber. The impeller, shaft, and rolling bearings constitute the rotor assembly. The bearing housing supports the rotor, with the rolling bearings absorbing both radial and axial forces.

7. The pump casing and cover are designed to separate from the rear of the impeller-a configuration known as the "back pull-out" design. This offers the advantage of easy maintenance: during servicing, the pump body, suction and discharge piping, and motor remain undisturbed; simply removing the spacer element of the coupling allows the rotor assembly to be withdrawn for maintenance.