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Wear-resistant axial flow pump impeller designing method

An axial-flow pump, wear-resistant technology, applied to parts, pumps, pump components, etc. of pumping devices used for elastic fluids, can solve the problem of service life, flow and head parameters decrease, impeller medium delivery capacity decrease, Problems such as circulation system failure and failure can be achieved to save equipment maintenance and replacement costs, reduce replacement frequency and times, and prolong life.

Active Publication Date: 2014-07-16
常州市长江热能有限公司
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AI Technical Summary

Problems solved by technology

However, in many industrial fields, axial flow pumps are used to transport two-phase flow media containing a large amount of slag, tailings and coal slime. When transporting these solid-liquid two-phase flow media containing more solid particles, commonly used axial flow pumps The impeller is prone to wear, the impeller blades and hub change due to particle wear, the medium conveying capacity of the impeller is reduced, and the service life, flow and head parameters are significantly reduced, which easily leads to failure and failure of the circulation system

Method used

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  • Wear-resistant axial flow pump impeller designing method
  • Wear-resistant axial flow pump impeller designing method
  • Wear-resistant axial flow pump impeller designing method

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Embodiment Construction

[0037] figure 1 and figure 2 Together determine the impeller shape and geometry for this embodiment. It is a high specific speed impeller. The blades (3) are evenly fixed on the impeller hub (5). The outer edge of the blade axial surface is a circular arc, which is beneficial to increase the internal passage area of ​​the impeller and relieve the solid in the solid-liquid two-phase flow. The impeller inlet diameter (1) is smaller than the maximum diameter of the impeller (2) due to the overcurrent wear of the particles on the axial flow pump, which can reduce the pressure drop and wear at the outer edge of the impeller inlet, and improve the anti-cavitation and wear resistance of the impeller. In order to improve the wear resistance and hydraulic performance of the axial flow pump, the present invention determines the impeller inlet diameter (1) D through the following relations j , the maximum diameter of the impeller (2) D, the diameter of the hub (4) D h , blade axial l...

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Abstract

The invention provides a wear-resistant axial flow pump impeller designing method. An axial flow pump is used for the field of petrifaction, mining, smelting and the like. A designing formula of main symmetric size parameters, like impeller inlet diameter Dj, impeller maximum diameter D, hub diameter Dh, blade axial length L and blade wrap angle phi, of an impeller is provided. By using a wear-resistant axial flow pump impeller designed by the method, wear-resistant performance of the pump can be improved, the problem of impeller wear when the axial flow pump is in media containing solid particles can be improved, and hydraulic efficiency and reliability of the impeller can be improved.

Description

technical field [0001] The patent of the present invention relates to a design method of an axial-flow pump impeller, specifically, a design method of an wear-resistant axial-flow pump impeller suitable for a solid-liquid two-phase flow medium. Background technique [0002] Axial flow pump is a type of centrifugal pump with large flow, high efficiency and low head, and is widely used in large flow circulation systems in petrochemical, mining and electric power fields. At present, the hydraulic model of the axial flow pump is generally designed according to the conditions of the clear water medium, and it has good hydraulic efficiency and medium passing capacity when transporting the clear water medium. However, in many industrial fields, axial flow pumps are used to transport two-phase flow media containing a large amount of slag, tailings and coal slime. When transporting these solid-liquid two-phase flow media containing more solid particles, commonly used axial flow pumps...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/20
Inventor 欧鸣雄邱白晶朱荣生付强
Owner 常州市长江热能有限公司
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