Centrifugal impeller geometry optimization designing method capable of improving pump efficiency

A technology of geometric parameters and centrifugal impeller, which is applied to the components, pumps, and pump components of pumping devices for elastic fluids.

Inactive Publication Date: 2013-12-18
CHENGDU YONGYI PUMPS
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  • Centrifugal impeller geometry optimization designing method capable of improving pump efficiency
  • Centrifugal impeller geometry optimization designing method capable of improving pump efficiency
  • Centrifugal impeller geometry optimization designing method capable of improving pump efficiency

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[0101] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0102] Convention notation:

[0103] Q T : The theoretical flow rate of the pump at the design point, m 3 / s;

[0104] Q: The flow rate of the pump at the design point, m 3 / s;

[0105] H: head of the pump at the design point, m;

[0106] n: design speed of the impeller, r / min;

[0107] ω: design rotational angular velocity of the impeller, 1 / s;

[0108] Ns: specific speed of the pump;

[0109] η, η h , η v , η m : Pump efficiency at design point, hydraulic efficiency, volumetric efficiency, mechanical efficiency;

[0110] hv: the impact loss at the outlet of the impeller at the design point, W;

[0111] ΔN 1 : Disc friction loss of the pump at the design point, W;

[0112] V 2 ,V m2 ,V u2 : Absolute velocity of water flow ...

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Abstract

The invention discloses a centrifugal impeller geometry optimization designing method which is capable of improving pump efficiency. The method includes establishing a optimizing model of the centrifugal impeller geometry with efficiency iterations, calculating volumetric efficiency eta v and mechanical efficiency eta m of a pump at a design point, and performing efficiency iterations during the process of impeller geometry optimization. The beta 2, namely the sum of two losses of the impeller to allow h to be minimum, and a corresponding R2 are the final solution of the design. The centrifugal impeller geometry optimization designing method is capable of improving efficiency of the centrifugal pump, performances of the pump are improved in a wider range, and minimum sum of impeller outlet impact loss and friction loss of the impeller disc can be acquired by calculating the efficiency iterations of the centrifugal impeller geometry; computer software program can be written to implement accurate calculation of the centrifugal impeller geometry, design is facilitated, speed is high, design and produce accuracy of the centrifugal impeller can be improved effectively, and the method is adaptable to industrial design and production.

Description

technical field [0001] The invention relates to an optimal design method of geometric parameters of a centrifugal impeller which can improve pump efficiency. Background technique [0002] Centrifugal pumps are the mainstream products of pumps, accounting for a large share of more than 10 million pumps produced in the country every year. According to statistics, 20% of domestic annual power generation is used to drive pumps and fans. Improving the performance and operating efficiency of products with a wide range of products such as centrifugal pumps is of special significance to the realization of the macroeconomic goals of energy saving and emission reduction. [0003] The external characteristics of the pump, including its efficiency at each working point, are mainly determined by the hydraulic design of the impeller, volute and other flow-passing components. Advanced design principles and methods are the basis for manufacturing excellent products. After accepting the or...

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Application Information

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IPC IPC(8): F04D29/22
Inventor 严敬周绪成
Owner CHENGDU YONGYI PUMPS
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