Radially split double-shell multiple-stage centrifugal pump

Abstract

The invention discloses a radially split double-shell multiple-stage centrifugal pump. The centrifugal pump comprises a pump barrel, a pump cover, a core cladding, a balance pipe and a bearing part, wherein an outlet pipe and an inlet pipe are arranged on the pump barrel; the core cladding comprises a suction section, a middle section, an intermediate section, a radial guide blade, a first stage impeller, a secondary stage impeller and an axis, the core cladding is radially split and can be put in or pumped out from one end of the pump as a whole; the first stage impeller is a double-suction impeller; the secondary stage impeller is a single-suction impeller. The pump in the structure disclosed by the invention is compact, convenient to repair, good in cavitation property and high in reliability, the axial force is automatic balancing.

Description

technical field

[0001] The invention relates to a multistage pump, in particular to a radially split double casing multistage centrifugal pump. Background technique

[0002] In multi-stage pumps, the double-suction first-stage impeller and the symmetrical arrangement of the secondary impeller can improve the cavitation performance of the pump and automatically balance the axial force of the rotor.

[0003] At present, the axially split multistage centrifugal pump has realized the characteristic technology of double-suction first-stage impeller and symmetrical arrangement of secondary impeller, but the casing of this type of pump has disadvantages such as complex molding, easy to produce defects, difficult processing, and high cost. .

[0004] In addition, radially split multistage centrifugal pumps usually need to install inducers to improve pump cavitation performance.

[0005] Furthermore, some single-casing radially split multistage centrifugal pumps also need to connec...

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