Dual-shell small-flow centrifugal pump

Abstract

The invention relates to a pump, in particular to a dual-shell small-flow centrifugal pump. The technical scheme provided by the invention is that: the dual-shell small-flow centrifugal pump comprises a pump body, a shaft seal device, a pump cover, a revolving shaft and an impeller, wherein the pump cover is arranged between the pump body and the shaft seal device; a flow channel is formed between the pump body and the pump cover; the pump body is provided with a medium inlet and a medium outlet which are communicated with each other through the flow channel; the impeller is in linkage connection with the revolving shaft and extends into the flow channel; the impeller is an open impeller; a pump body lining and a pump cover lining are arranged in the flow channel; the medium outlet is communicated with the flow channel through a diffusion hole formed on the pump body lining; the diffusion hole is conical; one end which is connected with the medium outlet is a large end, and one end which is connected with the flow channel is a small end; the flow channel is matched with the profile of the impeller; and the cross section of the flow channel is cylindrical. Due to the adoption of the technical scheme, a dual-shell small-flow centrifugal pump which has long service life and a simple structure, and is suitable for conveying particle mediums is provided.

Description

technical field [0001] The invention relates to a pump, in particular to a double casing small flow centrifugal pump. Background technique [0002] Centrifugal pumps are widely used as a medium conveying device. The traditional centrifugal pump is mainly composed of a pump body, a rotating shaft, an impeller and a shaft seal device. The pump body is provided with a medium inlet, a medium outlet, and a flow channel connecting the medium inlet and the medium outlet. Generally, closed impellers are mostly used for impellers, which have higher requirements on flow passages, and the flow in the pump body needs to be designed with a wider structure, and this type of design can only be used for the working conditions of large conveying media. For small In the field of flow, it is impossible to carry out the transportation of the medium. When it is used to convey the medium with particles, the particles in the medium are easy to stick to the closed impeller, which affects the cent...

AI Technical Summary

Problems solved by technology

Generally, closed impellers are mostly used for impellers, which have higher requirements on the flow channel, and the flow in the pump body needs to be designed with a wider structure, and this type of design can only be used when the medium is large. For small In the field of flow, it is impossible to transport the medium

When it is used to convey the medium with particles, the particles in the medium are easy to stick to the closed impeller, which affects the centrifugal force and the performance of the conveying medium of the centrifugal pump; at the same time, the particles in the medium will cause impact on the inside of the pump body Corrosion, which causes the pump body and its internal parts to wear out too quickly, shortening the service life of the pump body

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