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Hydraulic design method for double-blade non-block centrifugal impeller

A centrifugal impeller and hydraulic design technology, applied to mechanical equipment, components of pumping devices for elastic fluids, non-variable pumps, etc., can solve problems such as the lack of impeller hydraulic optimization design process and the inability to control the blade axial surface

Inactive Publication Date: 2016-01-13
ZHEJIANG COLLEGE OF ZHEJIANG UNIV OF TECHOLOGY
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing double-blade non-clogging centrifugal impeller design method has the following disadvantages: 1) it relies too much on the experience of the designer and the selection of relevant experience coefficients; 3) The absence or limitation of the impeller hydraulic optimization design process

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  • Hydraulic design method for double-blade non-block centrifugal impeller

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Embodiment 1

[0081] The present invention will be further described in detail below in conjunction with the drawings and embodiments. The empirical coefficients and recommended values ​​in this embodiment are obtained through a large number of experimental statistical data corrections, that is, empirical values ​​commonly used by those skilled in the art; the final design values ​​need to be checked by numerical calculation results.

[0082] Combine figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 with Figure 8 , A double-blade non-clogging centrifugal impeller hydraulic design method, wherein the double-blade non-clogging centrifugal impeller hydraulic structure includes a front cover 1, blades 2 and a rear cover 3, such as figure 1 , 2 As shown; including the following steps: 1) According to the given flow, head, pump efficiency and speed value, the main hydraulic geometric parameters of the double-blade non-clogging centrifugal impeller are solved based on t...

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Abstract

The invention discloses a hydraulic design method for a double-blade non-block centrifugal impeller. The double-blade non-block centrifugal impeller structurally comprises a front cover plate, blades and a rear cover plate. The hydraulic design method comprises the steps that (1) the main hydraulic geometrical parameters of the double-blade non-block centrifugal impeller are worked out based on a velocity coefficient method; (2) the shapes of the axial surfaces of the blades are controlled based on a quadratic Bezier curve control algorithm; (3) the molded line installation angles of the blades are controlled based on a quartic Bezier curve control algorithm; (4) optimization design is conducted on the double-blade non-block centrifugal impeller based on a non-dominated sorting genetic algorithm (NSGA) II; and (5) the double-blade non-block centrifugal impeller according with the given flow, the given lift, the given pump efficiency and the given rotating speed value is manufactured by using the data obtained in the step (1) to step (4) as the dimension parameters of the double-blade non-block centrifugal impeller. By the adoption of the double-blade non-block centrifugal impeller designed through the method, the flow capacity and the anti-twining capacity of the impeller can be improved, the internal flowing condition of the impeller is improved, and the operating stability and the hydraulic efficiency of the impeller are improved.

Description

Technical field [0001] The invention belongs to the field of centrifugal pump hydraulic design methods, and specifically relates to a double-blade non-clogging centrifugal impeller hydraulic design method, which is mainly used for fast and effective hydraulic design and optimization of the double-blade non-clogging centrifugal impeller, under the premise of ensuring the particle passing capacity , In order to further improve the efficiency of the hydraulic model and achieve the purpose of energy saving and emission reduction. Background technique [0002] The double-blade non-clogging centrifugal impeller has good non-clogging performance and high efficiency, and it is widely used in many fields such as municipal sewage treatment and industrial process treatment. At present, the efficiency of double-blade non-clogging impellers on the market is generally low. The hydraulic design method is relatively traditional. The blades are drawn based on experience, and the axial shape of th...

Claims

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Application Information

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IPC IPC(8): F04D29/22
Inventor 吴登昊任芸牟介刚杨友东蒋兰芳谷云庆
Owner ZHEJIANG COLLEGE OF ZHEJIANG UNIV OF TECHOLOGY
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