Water suction chamber of multistage centrifugal pump

Abstract

The invention discloses a water suction chamber of a multistage centrifugal pump. The water suction chamber comprises a shell body, wherein a water inlet is disposed at the upper end of the shell body, and one end of the front end surface of the shell body is connected with a water inlet chamber and communicated with the inlet of an impeller. The centrifugal pump further comprises a flow guide plate, wherein the flow guide plate is disposed in the shell body and located at a middle position above a shaft hole in the shell body. A liquid entering in the water suction chamber can be divided into two parts flowing downwards via the flow guide plate, thereby efficiently reducing the reflux of the liquid, and benefiting to ensure the flow speed of the liquid entering in the water suction chamber to be uniform and stable. Additionally, the speed of a water flow in a whole flow passage can be kept uniform and stable via an optimized design for the flow passage of the shell body. Moreover, the water suction chamber of a multistage centrifugal pump further has the advantages of being simple in structure and easy in processing.

Description

Technical field [0001] The invention relates to a centrifugal pump, and more specifically, to a suction chamber of a multistage centrifugal pump. Background technique [0002] The suction chamber is the flow-through part from the pump inlet to the impeller inlet, and its function is to introduce liquid into the impeller according to the required conditions. At present, the common suction chambers on multi-stage centrifugal pumps are divided into annular suction chambers and spiral suction chambers. [0003] See figure 1 As shown, the annular suction chamber 10 is a suction chamber with the same body shape and cross-sectional area, and its structure is simple and symmetrical. For example, the application number 96207955.3, the suction chamber disclosed in the Chinese patent entitled Double-volute multi-stage pump inlet section is the *annular suction chamber. However, the suction chamber 10 of this structure cannot guarantee that the impeller inlet has an axially symmetric and uni...

AI Technical Summary

Problems solved by technology

However, because of its complex structure and difficult processing, it usually needs to be cast to complete

However, during casting, defects such as blisters and pores often appear, and the runners are not smooth enough. These defects in castings can easily lead to an increase in production costs and a prolongation of the production cycle.

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