Designing method of axial flow pump impeller based on wheelbase

A design method, technology of axial flow pumps, applied in the direction of axial flow pumps, components of pumping devices for elastic fluids, computer aided design, etc.

Active Publication Date: 2019-05-17
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] So far, there has not been a public report on the design method of the axial flow pump impeller based on the axial length. The present invention provides a design method of the axial flow pump impeller based on the axial length

Method used

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  • Designing method of axial flow pump impeller based on wheelbase
  • Designing method of axial flow pump impeller based on wheelbase
  • Designing method of axial flow pump impeller based on wheelbase

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Effect test

Embodiment

[0085] Axial flow pump design flow rate Q=0.35m 3 / s, head H=6.72m, speed n=1450r / min, design axial length L 1 = 26mm. The present invention is further described below:

[0086] 1. Determine the airfoil chord length l and blade placement angle β by flow Q, head H, and speed n L , calculated as follows:

[0087] (1) Determine the number of impeller design sections and the number of blades

[0088]

[0089] According to the table below, take the number of impeller sections as 5

[0090] Specific speed n s

n s ≤450

450≤n s ≤800

800≤n s

Number of impeller sections

4

5

6

[0091] According to the following table, take z=4;

[0092] Specific speed n s

0～600

600～850

850～1500

blade number z

3

4

5

[0093] (2) Airfoil chord length l

[0094] The airfoil chord length l of section 5 5

[0095] According to the table below, take a=6;

[0096] blade number z

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Abstract

The invention belongs to the field of fluid mechanical design, and discloses a designing method of an axial flow pump impeller based on a wheelbase. The designing method of the axial flow pump impeller based on the wheelbase includes the following steps that (1) on the basis of a designed function L = l*sin beta L according to the axial length L of the axial flow pump impeller, design parameters of flow Q, lift H, revolving speed n, and specific speed ns are designed according to a given axial flow pump, fracture surfaces are divided from an impeller wheel hub to the impeller outer edge at equal intervals, the number of the fracture surfaces and blades is determined through the specific speed ns, and the wing section chord length l of the axial flow pump impeller and placed angle beta L are determined; (2) the wing section chord length l and the placed angle beta L are standard parameters, and an impeller diameter D, an wheel hub diameter dh, and pitch are determined; and (3) a 791wingsection thickness change rule is chose to thicken the blades.

Description

technical field [0001] The invention belongs to the field of fluid machinery design, and in particular relates to a design method of an axial-flow pump impeller based on a wheelbase. Background technique [0002] Pump stations and sluices are important components of water conservancy, environmental protection, urban water supply and drainage, and enterprise water affairs projects. Pumps are irrigation and drainage equipment, and sluices are low-head hydraulic structures that regulate water levels and control flow. The traditional pump gate construction usually adopts the combination of axial flow pump and sluice, that is, a gate is arranged in the middle along the cross section of the river channel, and a water pump is arranged on each side of the gate. The separation design of the pump and the gate of this kind of pump gate leads to the displacement of the traditional pump gate far below the actual needs, and the flood season is often unable to carry out timely and effectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/18G06F17/50
CPCG06F30/17F04D3/005F04D29/026F04D29/181F05D2240/301G06F2113/08F04D29/18
Inventor 吴贤芳田骁谈明高刘厚林王凯王勇董亮
Owner JIANGSU UNIV
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