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A hydraulic design method for bidirectional axial flow pump

A technology of hydraulic design and axial flow pump, which is applied to the components, pumps, and pump components of pumping devices for elastic fluids, which can solve problems such as low efficiency and inability to meet requirements, so as to improve efficiency and improve the flow in the pump. the effect of the situation

Active Publication Date: 2017-08-08
JIANGSU GUOQUAN PUMP MFG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary axial-flow pumps have high efficiency when running forward, but when running in reverse, the efficiency is very low, which not only cannot meet the requirements, but also deviates from the national energy-saving policy. Therefore, the design and research of bidirectional axial-flow pumps have important great significance

Method used

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  • A hydraulic design method for bidirectional axial flow pump
  • A hydraulic design method for bidirectional axial flow pump
  • A hydraulic design method for bidirectional axial flow pump

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Embodiment Construction

[0047] figure 1 with figure 2 Together determine the shape of the impeller of the axial flow pump. It can improve the flow conditions in the pump, improve the efficiency and head of the axial flow pump when it works in reverse, and take into account the performance requirements when it runs in forward and reverse directions. The present invention determines the density of the cascade, the arc radius of both ends of the airfoil by 1, the inlet angle of the blade by 3, and the thickness of the airfoil by 9 through the following relational expressions.

[0048] Calculate Cascade Density

[0049] no s =1000~2000;

[0050] (l / t) h =(1.25~1.45)(l / t) 0 ;

[0051] Calculate blade inlet angle β 1 = β 1 '+Δβ;

[0052] Δβ=0°~6°, gradually increasing from the rim to the hub;

[0053]

[0054] Calculate the radius of the arc at both ends of the airfoil and determine the thickness of the airfoil

[0055]

[0056] x / l 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9...

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Abstract

The invention provides a bidirectional axial flow pump hydraulic design method. By means of determination method for changing several important design parameters including cascade solidity, blade inlet angle and wing section thickness of a rotational flow pump impeller, an S-shaped wing section is adopted to improve flowing situation inside an axial flow pump, improve the efficiency and lift of the axial flow pump in reverse working and give consideration to performance requirements during forward and reverse operation.

Description

technical field [0001] The invention relates to a hydraulic design method of an axial flow pump, in particular to a hydraulic design method of a bidirectional axial flow pump impeller. Background technique [0002] Due to its large flow and simple structure, axial flow pumps are used for water transfer and irrigation in some coastal and riverside pumping stations. However, due to the special climate along the coast and along the river, part of the time needs to be used for drainage, and it is required to work in forward and reverse directions. . Ordinary axial-flow pumps have high efficiency when running forward, but when running in reverse, the efficiency is very low, which not only cannot meet the requirements, but also deviates from the national energy-saving policy. Therefore, the design and research of bidirectional axial-flow pumps have important great significance. The impeller is the core component that affects the performance of the axial flow pump. Therefore, whe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/18
CPCF04D29/181F05D2250/00
Inventor 朱荣生陈宗良
Owner JIANGSU GUOQUAN PUMP MFG CO LTD
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