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Multi-stage axial flow pump

A technology for axial flow pumps and pump shafts, which is applied in the direction of axial flow pumps, pumps, non-variable pumps, etc., and can solve problems such as limited head, limited application range, and low head

Inactive Publication Date: 2015-02-18
康净爽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing axial flow pumps only have a single axial flow impeller, which produces limited head. The maximum head of small and medium-sized axial flow pumps is only 11.51 meters, and the head of large axial flow pumps is lower, which is only suitable for large flow and low head environments. use, which greatly limits its scope of application

Method used

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Embodiment Construction

[0007] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0008] Such as figure 1 As shown, the multi-stage ordinary axial flow pump includes a pump body 1, a pump shaft 2, an inlet pipe 3, and an outlet pipe 4. Two impellers 5 are sleeved on the pump shaft 2 one by one. Flat key connection.

[0009] Such as figure 2 As shown, the multi-stage submersible axial flow pump is based on the existing single-stage submersible axial flow pump structure. After the pump body 6 and the pump shaft 7 are axially lengthened, the two impellers 8 are inserted one by one on the pump shaft 7. Above, the pump shaft 7 and the hub of the impeller 8 are connected by a flat key.

[0010] Due to the improvement of the above structure, the present invention allows a plurality of impellers to operate in the pump body cavity with high concentricity, and the liquid is pressed up step by step by the impellers, and the pressu...

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Abstract

The invention discloses a multi-stage axial flow pump. The multi-stage axial flow pump comprises a pump body, a pump shaft, a water inlet pipe and a water outlet pipe, and is characterized in that two to four impellers are coaxially connected to the pump shaft in series. Due to the structure improvement, the impellers operate in a pump body cavity with extremely high concentricity, liquid is pressurized step by step by the impellers, the pressure is multiplied step by step, and the lift is improved accordingly. Except for the first stage of impeller, the other stages of impellers work in the pressurized liquid, the liquid is not easy to vaporize, the phenomenon that the impellers are damaged by cavitation can be avoided, the service lives of the impellers are prolonged, and the multi-stage axial flow pump can be widely applied to conveying of water, oil and other liquid.

Description

technical field [0001] The invention relates to a pump, in particular to a multistage axial flow pump. Background technique [0002] Existing axial flow pumps only have a single axial flow impeller, which produces limited head. The maximum head of small and medium-sized axial flow pumps is only 11.51 meters, and the head of large axial flow pumps is lower, which is only suitable for large flow and low head environments. use, greatly limiting its scope of application. Contents of the invention [0003] The object of the present invention is to provide a multi-stage axial flow pump with high head and wide application range in order to overcome the above disadvantages. [0004] The object of the present invention is achieved in the following way: the multistage axial flow pump includes a pump body, a pump shaft, a water inlet pipe and a water outlet pipe, and is characterized in that 2 to 4 impellers are coaxially connected in series on the pump shaft. Description of drawi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D3/00
CPCF04D3/005
Inventor 康净爽
Owner 康净爽