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Gap drainage impeller for centrifugal pump and centrifugal pump with same

A centrifugal pump and gap technology, which is applied to the components, pumps, and pump components of the pumping device for elastic fluids, can solve the problems of poor anti-cavitation performance and complex flow field structure, and achieves the improvement of hydraulic performance and avoidance of Vortex, loss reduction effect

Active Publication Date: 2019-09-20
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 with 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, t...

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PUM

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Abstract

The invention discloses a gap drainage impeller for a centrifugal pump. The gap drainage impeller for the centrifugal pump comprises a front cover plate, a rear cover plate, a hub and blades, wherein the blades comprises a front-section blade and a rear-section blade, the gap for drainage is formed between the front-section blade and the rear-section blade, the width of the gap at the position of the front cover plate is marked as L1, the width of the gap at the position of the rear cover plate is marked as L2, and L1 is equal to L2. According to the gap drainage impeller for the centrifugal pump and the centrifugal pump with same, the cavitation degree in the gap drainage impeller is low, and the hydraulic performance of the centrifugal pump is improved within a certain working condition range.

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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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