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Hydraulic design method of high-lift axial flow pump impeller

A hydraulic design and axial flow pump technology, applied in the field of nuclear power, can solve the problems that it is difficult to achieve the expected effect, and the theoretical design and the actual model are different.

Active Publication Date: 2016-06-01
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing design method, the theoretical design and the actual model are quite different, and it is difficult to achieve the expected effect

Method used

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  • Hydraulic design method of high-lift axial flow pump impeller
  • Hydraulic design method of high-lift axial flow pump impeller
  • Hydraulic design method of high-lift axial flow pump impeller

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Embodiment Construction

[0145] The present invention uses the following formulas to determine the impeller head coefficient ψ of the axial flow pump, the impeller hub ratio R d , Impeller diameter D, blade inlet shaft speed v m1 , The blade outlet axial velocity v m2 , The circumferential sub-velocity at the blade exit v u2 、The density of the cascade on the side of the impeller hub S h 、Dense density of cascade on side of impeller flange S 0 、The angle coefficient of blade exit K β2 、The blade inlet placement angle coefficient K β1 , Blade inlet placement angle β 1 , The blade exit placement angle β 2 , The number of impeller blades z, the maximum blade thickness δ max , Profile radius R, hub diameter at the impeller inlet d 2 , Impeller hub diffusion angle α, impeller round nut height h b Several parameters of the impeller and different cross-sectional forms of the blades.

[0146] In this embodiment, the hydraulic parameters of the impeller are calculated under the given design working condition flow Q,...

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Abstract

The invention relates to a hydraulic design method of a high-lift axial flow pump impeller. Main geometric parameters of the impeller are provided, and include a maximum thickness delta max of axial flow pump blades, a molded line radius R, an impeller blade number z, an impeller hub side cascade solidity Sh, an impeller rim side cascade solidity S0, a blade inlet placing angle beta 1, a blade outlet placing angle beta 2, a blade inlet axial surface speed vm1, a blade outlet axial surface speed vm2, a blade outlet peripheral component speed vu2, an impeller diameter D, an impeller hub ratio Rd, an impeller lift coefficient psi, an impeller inlet hub diameter d2, an impeller hub dispersion angle alpha, an impeller round nut height hb, a blade outlet placing angle coefficient K beta 2, a blade inlet placing angle coefficient K beta 1, selection of wing sections with different sections of blades and the like. The designed axial flow pump impeller improves both the impeller lift and the cavitation resistance of an axial flow pump, facilitates computer programming, and can replace traditional similar design method and speed coefficient method of the axial flow pump to a greater extent.

Description

Technical field [0001] The invention relates to a design method of main parts of an axial flow pump, in particular to a hydraulic design method of a high-lift axial flow pump impeller. The axial flow pump has high lift and good anti-cavitation performance, and is suitable for agricultural irrigation, municipal water supply and drainage, thermal power, petrochemical enterprises for circulating water supply, process water supply and regional water transfer, especially in the field of nuclear power. Background technique [0002] Axial flow pump is a kind of vane pump. It has the characteristics of simple structure, small area, large flow and high efficiency. The specific speed of axial flow pump is 500~1600. At present, its application range is gradually expanding to other pumps. Product field expansion. [0003] Axial flow pumps are mainly used in agricultural irrigation and drainage, municipal water supply and drainage, thermal power, nuclear power, petrochemical enterprises and ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/18
CPCF04D29/181
Inventor 付强张本营朱荣生刘刚李梦圆
Owner JIANGSU UNIV
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