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Gap drainage impeller for centrifugal pump and centrifugal pump with same

A centrifugal pump and slit technology, which is applied to parts, pumps, and pump elements of pumping devices used for elastic fluids, can solve problems such as complex flow field structures and poor anti-cavitation performance, and achieve improved hydraulic performance and air-conditioning performance. The effect of reducing the degree of vulcanization and avoiding vortex

Active Publication Date: 2021-11-30
JIANGSU UNIV ZHENJIANG RES INST OF FLUID ENG EQUIP TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the internal flow field structure of the traditional centrifugal pump impeller is complex, and the anti-cavitation performance is poor.

Method used

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  • Gap drainage impeller for centrifugal pump and centrifugal pump with same
  • Gap drainage impeller for centrifugal pump and centrifugal pump with same
  • Gap drainage impeller for centrifugal pump and centrifugal pump with same

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0049] Such as figure 1 and figure 2 As shown, a gap drainage impeller for a centrifugal pump includes a front cover 1, a rear cover 2, a hub 3 and blades 4;

[0050] The blade 4 includes a front blade a and a rear blade b, and the blade 4 is provided with a slit 5 for drainage.

[0051] In order to reduce the loss after the fluid flows out of the gap 5 and avoid the vortex at the inlet of the rear blade b, the radius R of the rounded corner of the rear blade b is 1 Should be as large as possible.

[0052] Since the cavitation near the front cover 1 is more severe than that of the rear cover 2, the gaps 5 have different widths. The gap 5 has a width L at the front cover 1 1 Greater than the width L at 2 places of the rear cover 2 .

[0053] In some embodiments, th...

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Abstract

A gap drainage impeller for a centrifugal pump of the present invention comprises a front cover plate, a rear cover plate, a hub and blades, and the blades include a front blade and a rear blade; There is a slit for drainage; wherein, the width of the slit at the front cover is denoted as L 1 , the width of the gap at the rear cover is denoted as L 2 , L 1 >L 2 . The invention has a low degree of cavitation in the gap drainage impeller, and improves the hydraulic performance of the centrifugal pump within a certain range of working conditions.

Description

technical field [0001] The invention relates to the technical field of centrifugal pumps, in particular to a gap drainage impeller for centrifugal pumps and a centrifugal pump with the same. Background technique [0002] Centrifugal pumps, as a kind of general machinery, play a vital role in both traditional and special fields. With the continuous development and progress of science and technology in various fields, higher requirements are put forward for the stability of centrifugal pumps. In the actual operation process, the centrifugal pump will cause cavitation due to various reasons. The occurrence of cavitation often affects the normal flow of fluid in the pump, resulting in a decrease in pump performance. When the cavitation is severe, it will cause the entire system to fail to operate normally, or even be damaged. Therefore, while improving the hydraulic performance of the centrifugal pump, it should also have good cavitation performance as much as possible, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/22F04D29/66
CPCF04D29/2272F04D29/669
Inventor 董亮郭瑾楠张子龙代翠刘厚林朱建成张立新
Owner JIANGSU UNIV ZHENJIANG RES INST OF FLUID ENG EQUIP TECH