Design method for centrifugal pump impeller with high specific revolution number

A centrifugal pump impeller and design method technology, applied in the direction of pumps, pump components, mechanical equipment, etc., can solve the problems of low operating efficiency, difficult processing, unstable pump system, etc., and achieve stable operation, high-efficiency operating range, and easy processing Effect

Inactive Publication Date: 2011-05-18
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to avoid designing a large-flow high-lift pump with a specific speed greater than 400 and less than 600 as a mixed-flow pump or an axial-flow pump, resulting in unstable pump systems and low operating efficiency during variable operating conditions. Difficult problem, a high specific speed centrifugal pump impeller design method proposed by the present invention can design a high-flow low-lift pump with a specific speed greater than 400 and less than 600 into a centrifugal pump with stable performance curve, wide high-efficiency area, and easy processing , so that the system is stable and efficient when operating under variable conditions

Method used

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  • Design method for centrifugal pump impeller with high specific revolution number
  • Design method for centrifugal pump impeller with high specific revolution number
  • Design method for centrifugal pump impeller with high specific revolution number

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] The design working condition of embodiment is flow Q=250m 3 / h, head H=4m, number of revolutions n=1450r / min, specific number of revolutions to combine figure 1 and figure 2 , using the design method of the present invention to design key geometric parameters such as the inclination angle 1 of the front cover plate of the impeller, the inclination angle 2 of the rear cover plate of the impeller, and the outlet diameter 3 of the impeller.

[0021] D. 2 =21.2·n s -1 / 6 ·Q 1 / 6 ·H 1 / 4 n -2 / 3

[0022] T 1 =0.0001n s 2 -0.048n s +64.836;

[0023] T 2 =-0.0002n s 2 +0.183n s +38.572;

[0024] In addition, the outlet placement angle β 2 =23°, blade number Z=5;

[0025] The remaining geometric parameters are the same as the design process and method of the existing centrifugal pump, and will not be repeated here.

[0026] image 3 ...

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Abstract

The invention discloses a design method for a centrifugal pump impeller with a high specific revolution number, belonging to the technical field of pumps. In the invention, the design formulas and the numerical ranges of geometric parameters, such as impeller outlet diameter, impeller front cover plate dip angle, impeller rear cover plate dip angle, blade quantity, outlet location angle and the like are provided, a high-flow low-lift pump with the specific revolution number being 400-600 is designed into a centrifugal pump, compared with the traditional design theory that a pump with the specific revolution number being 400-600 is designed into a mixed-flow pump or an axial-flow pump, the design method provided by the invention achieves the advantages of stable performance during variable working condition running and wide efficient zone; meanwhile, the centrifugal pump impeller in the design method is easy to process and has a certain popularization value.

Description

technical field [0001] The invention relates to a design method of main parts of a vane pump, in particular to a design method of a centrifugal pump impeller with a specific rotation number greater than 400 but less than 600. Background technique [0002] At present, with the rapid development of industry and agriculture, large-flow low-head pumps are widely used, usually with specific revolutions between 400 and 600, and often need to be operated under variable conditions according to actual conditions. According to the existing pump design theory, the pump impeller is designed according to the specific speed. When the specific speed is less than 300, it is designed as a centrifugal impeller. When the specific speed is greater than 300 and less than 500, it is designed as a mixed flow impeller, also known as a diagonal flow impeller. , when the specific speed is greater than 500, it is designed as an axial-flow impeller. Usually, the pump equipped with a centrifugal impelle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/22
Inventor 刘厚林王勇袁寿其谈明高王凯
Owner JIANGSU UNIV
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