Combined type method for designing variable-camber low-specific-speed centrifugal pump impeller

A centrifugal pump impeller, low specific speed technology, applied in the direction of non-variable-capacity pumps, pumps, pump components, etc., can solve the problem of head reduction, impeller turbulence and vortex, pump unit vibration intensity and operation instability increase and other problems, to achieve the effect of increasing head, improving hydraulic performance and conveying capacity, and increasing head and operable flow range.

Active Publication Date: 2014-08-20
JIANGSU YAMEI PUMP IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the flow rate of conventional low specific speed centrifugal pumps increases, the head will gradually decrease, and the internal flow field of the impeller will easily produce more obvi

Method used

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  • Combined type method for designing variable-camber low-specific-speed centrifugal pump impeller
  • Combined type method for designing variable-camber low-specific-speed centrifugal pump impeller
  • Combined type method for designing variable-camber low-specific-speed centrifugal pump impeller

Examples

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Example Embodiment

[0039] figure 1 with figure 2 The shape and geometry of the impeller of this embodiment are jointly determined. This is a closed structure compound variable curvature low specific speed centrifugal pump impeller. The front cover (4) of the impeller and the rear cover (6) of the impeller have straight radial dimensions and structure, and the axial section through the flow passage is relatively straight. Wide, allowing solid particles of a certain size to pass through. The splitter blades (8) and the forward curved blades (9) are distributed on the outer edge of the impeller, and both adopt straight blade type, in which the splitter blades (8) are evenly distributed between the backward curved blades (3), and their blade inclination angles are respectively α 1 And α 2 . The present invention uses the following relations to determine the outer diameter of the impeller (1) D, the inlet diameter of the impeller (2) D j , The width of the impeller outlet (5)b, the inner diameter of...

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Abstract

The invention provides a combined type method for designing a variable-camber low-specific-speed centrifugal pump impeller. The impeller is suitable for the fields such as pipe pressurization, high-lift water supply and municipal engineering. The design formula of main physical dimension parameters, including the impeller outer diameter D, the impeller inlet diameter Dj, the impeller outlet width b, the front bending blade inner diameter Db, the splitter blade slant angle alpha1, the front bending blade slant angle alpha2 and the blade wrapped angle phi, of the impeller is given. By means of the combined type method for designing the variable-camber low-specific-speed centrifugal pump impeller, flowing inside the impeller can be improved, and the lift and the stability of the impeller on large-flow working condition points can be improved.

Description

technical field [0001] The patent of the present invention relates to a design method of a composite centrifugal pump impeller, specifically, a design method of a composite variable curvature low specific speed closed centrifugal pump impeller suitable for pressurization and water supply and other occasions. Background technique [0002] As a type of centrifugal pump with a wide range of uses, low specific speed centrifugal pumps are widely used in pipeline pressurization, high-lift water supply, lawn spraying, cleaning and solar energy systems, etc., with small flow, high lift and easy installation. features. When the flow rate of a conventional low specific speed centrifugal pump increases, the head will gradually decrease, and the internal flow field of the impeller will easily produce more obvious turbulent flow and vortex, and the vibration intensity and operation instability of the pump unit will increase, which cannot continue Stable operation and water supply under ...

Claims

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Application Information

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IPC IPC(8): F04D29/22
Inventor 欧鸣雄邱白晶付强
Owner JIANGSU YAMEI PUMP IND GRP
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