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Design method of efficient low-cavitation overload-free centrifugal pump impeller

A centrifugal pump impeller and design method technology, applied to pumps, pump components, mechanical equipment, etc., can solve problems such as poor cavitation performance, low efficiency, and unsatisfactory non-overload characteristics, so as to improve cavitation performance and pump efficiency , Excellent non-overload characteristics

Active Publication Date: 2013-04-17
HEFEI GENERAL MACHINERY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In short, there are still problems in the current non-overload centrifugal pump: 1. The non-overload characteristic is not ideal; 2. The cavitation performance is poor; 3. The efficiency is low.

Method used

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  • Design method of efficient low-cavitation overload-free centrifugal pump impeller
  • Design method of efficient low-cavitation overload-free centrifugal pump impeller
  • Design method of efficient low-cavitation overload-free centrifugal pump impeller

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Embodiment Construction

[0049] figure 1 and figure 2The figures shown collectively define the shape of the impeller in the embodiment. The shape of the impeller in this embodiment is the same as that of most centrifugal pump impellers, it has an impeller front cover 2 and an impeller rear cover 4, and is a closed impeller. If there is no impeller front cover plate, that is, it is made into a semi-open or open impeller, which will not affect the implementation of the present invention, because the present invention controls the parameters of the blades 6.

[0050] The present invention adopts the following technical solutions: β 2s =14°~21°, β 2p =10°~16°, Δβ 2 =2°~7°, Z=4~6, θ=155°~210°, Y=1.1~1.5, optimize the geometric parameters of the hydraulic model, so that the centrifugal pump meets the axial power curve of the centrifugal pump after a certain flow point The theoretical conditions of the extreme value, including: optimizing the design of the impeller outlet width 3, the impeller outer di...

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Abstract

The invention relates to the technical field of centrifugal pump impellers, in particular to a design method of an efficient low-cavitation overload-free centrifugal pump impeller. Geometric parameters of a hydraulic model of the centrifugal pump impeller are as follows: beta2s=14 degrees-21 degrees; beta2p=10 degrees-16 degrees; deltabeta2=beta2s-beta2p=2 degrees to 7 degrees; beta1s=15 degrees-36 degrees; beta1p=16 degrees-35 degrees; Z=4-6; theta=155 degrees-210 degrees; and Y=0.8-1.5. In the formula, beta2s refers to a blade outlet back setting angle, beta2p refers to a blade outlet working surface setting angle, deltabeta2 refers to angle difference of the blade outlet back setting angle and the blade outlet working surface setting angle, beta1s refers to a blade inlet back setting angle, beta1p refers to a blade inlet working surfacing setting angle, Z refers to the number of blades, theta refers to a blade wrap angle, and Y refers to area ratio. By the design method, pump efficiency and cavitation performance are improved, real ideal overload-free characteristic is achieved, and accordingly ideal, overload-free, stable and reliable operation of a centrifugal pump is achieved in an efficient, energy-saving, total-lift and full-flow manner.

Description

technical field [0001] The invention relates to the technical field of impellers of centrifugal pumps, in particular to a design method for impellers of centrifugal pumps with high efficiency, low cavitation and no overload. Background technique [0002] The currently known impeller design method for centrifugal pumps is to reduce the outer diameter of the impeller as much as possible while meeting the design requirements of flow rate and head, so as to improve the pump efficiency, so that the placement angle of the blade outlet is relatively large. Therefore, the shaft power of a general centrifugal pump increases continuously with the increase of the flow rate, and the lower the specific speed, the faster the shaft power curve rises with the increase of the flow rate. Prime mover power, resulting in prime mover overload. However, many workplaces require centrifugal pumps to have high efficiency, excellent cavitation performance, and safe and reliable non-overload operatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/22F04D29/66
Inventor 张兴林李鲲吴生盼沈宗沼丁强民姚黎明刘海山丁思云李香
Owner HEFEI GENERAL MACHINERY RES INST
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