Diagonal flow pump impeller hydraulic design method

An oblique flow pump and impeller technology, which is applied to the components, pumps, and pump components of the pumping device for elastic fluids, which can solve the problems of difficulty in achieving the expected effect, large discrepancy between theoretical design and actual model, etc.

Active Publication Date: 2015-04-22
JIANGSU UNIV
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  • 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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  • Diagonal flow pump impeller hydraulic design method
  • Diagonal flow pump impeller hydraulic design method
  • Diagonal flow pump impeller hydraulic design method

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Embodiment Construction

[0189] The present invention determines the impeller outlet diameter D through the following formulas 2 , impeller inlet equivalent diameter D 0 , Blade outlet width b 2 , impeller outlet diameter coefficient M D2 , impeller inlet equivalent diameter coefficient M D0 , blade outlet width coefficient M b2 , the angle between the outlet of the impeller of the oblique flow pump and the horizontal line α, the fillet radius of the inlet of the front cover of the impeller R DB , Radius R of impeller round nut a , the height of the impeller round nut R h , The inlet fillet radius R of the impeller back cover TS , the distance between the impeller front cover blade inlet and the front cover outlet Z E , The distance from the beginning end of the curve of the front cover plate to the inlet margin g 1 , blade inlet axial speed v m1 , blade outlet axial speed v m2 , blade exit peripheral speed u 2 , hydraulic efficiency η h , slip coefficient ρ, blade inlet placement angle β ...

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Abstract

The invention relates to a diagonal flow pump impeller hydraulic design method. A design formula about main geometric parameters of the impeller is given, and includes an included angle Alpha between the outlet of the diagonal flow pump impeller and the horizontal line, the actual thickness Delta of each point of each vane, vane wrap angle Phi, the inlet fillet radius RTS of the rear cover plate of the impeller, the number z of impeller vanes, the diameter D2 of the impeller outlet, the width b2 of the vane outlet, the equivalent diameter D0 of the impeller inlet, a distance ZE between the vane inlet of the front cover plate and the outlet of the front cover plate of the impeller, a distance g1 from the inlet edge to the initial end of the curve of the front cover plate, the inlet fillet radius RDB of the front cover plate of the impeller, round nut radius Ra of the impeller, round nut height Rb of the impeller, the placing angle of the vane Beta, the placing angles Beta1 of inlet of the vane, the placing angles Beta2 of inlet of the vane, the slipping coefficient Rho and the hydraulic efficiency Etah. According to the impeller of the diagonal flow pump designed by the invention, the hydraulic efficiency of the impeller and the stability performance of the diagonal flow pump are improved, and computer programming is facilitated, and thereby the original similar design method and the velocity coefficient method of the diagonal flow pump can be replaced to a great extent.

Description

technical field [0001] The invention relates to a design method of main parts of a diagonal flow pump, in particular to a hydraulic design method of an impeller of a diagonal flow pump. The oblique flow pump impeller is suitable for high hydraulic efficiency and good stability in agricultural drainage and irrigation, municipal water supply and drainage, thermal power, nuclear power, petrochemical enterprises, etc. for circulating water supply, process water supply and regional water transfer and other fields. Background technique [0002] Diagonal flow pump is also called guide vane mixed flow pump. It has the characteristics of small footprint, small outer diameter, easy start-up and high efficiency. It is a water pump whose performance and structure are between centrifugal pumps and axial flow pumps. The disadvantages of the former have the advantages of both. The specific speed of the diagonal flow pump is between 290 and 590, and its application scope is gradually expan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/18
CPCF04D29/18
Inventor 付强张本营朱荣生王秀礼王学吉刘永张帆
Owner JIANGSU UNIV
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