A semi-open centrifugal pump impeller and its optimal design method

A centrifugal pump impeller, optimized design technology, applied in the field of centrifugal pump research, can solve the problems of blade outlet boundary layer separation, low dead center lift, front cover leakage, etc., to reduce swirl and cavitation, improve lift and efficiency , The effect of improving pump efficiency

Active Publication Date: 2020-03-31
JIANGSU UNIV
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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a semi-open centrifugal pump impeller and its optimization design method to solve the problems of low efficiency, large inlet loss, inlet cavitation, and front cover plate Leakage, boundary layer separation at the blade outlet, low lift at the dead point, loud noise, etc.

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  • A semi-open centrifugal pump impeller and its optimal design method
  • A semi-open centrifugal pump impeller and its optimal design method
  • A semi-open centrifugal pump impeller and its optimal design method

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0036] Such as figure 1 As shown, the optimization object is the impeller of the semi-open impeller centrifugal pump of A1 type, and its rated speed is 2900 rpm. 1 =6, impeller outer diameter d4 =200mm, blade inlet diameter d 1 =85.2mm, inclination angle β at the blade inlet 1 =130°, the blade placement angle α of the outlet 8 of the positive blade surface 9 of the blade 2 Z1 and the blade setting angle α of the outlet 8 of the back blade surface 10 b1 equal and alpha z1 = α b1 =29°, the circumferential blade thickness d of the blade inlet j1 =6.5mm, the circumferential blade thickness d of the blade outlet c1 =14.6mm, the inner diameter of the hub d=23mm, the diameter of the hub at the impeller inlet d 5 = 35mm.

[0037] Such as figure 2 with image 3 As show...

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Abstract

The invention provides a method for optimizing the design of a semi-open centrifugal pump impeller, comprising the following steps: the number of long blades after optimization is less than that of the long blades of the impeller before optimization; any two long blades after optimization are provided with circumferentially different lengths; Split flow middle blades and split flow short blades arranged at equal intervals; the split flow middle blades and split flow short blades are the same as the outlet position, profile and thickness of the optimized long blades, and the split flow middle blades and split flow short blades are the same as the optimized The positions of the inlets of the rear long blades are different; in the direction of rotation of the impeller, the order of arrangement in the circumferential direction is the optimized rear long blades, the split short blades and the split flow middle blades. The invention can solve the problems of low efficiency, large inlet loss, inlet cavitation, leakage of front cover plate, separation of blade outlet boundary layer, low lift at dead point, high noise and the like in the semi-open impeller centrifugal pump.

Description

technical field [0001] The invention relates to the field of centrifugal pump research, in particular to a semi-open centrifugal pump impeller and an optimal design method thereof. Background technique [0002] As a general-purpose machine, the pump is mainly used to convert the mechanical energy of the prime mover into the energy of the fluid. There are many types of pumps, and they have been widely used in various sectors of the national economy and high-tech fields such as aerospace ships. According to statistics, the power consumption of pumps accounts for 18% of the total power generation. Therefore, improving the research and design level of centrifugal pumps has an important impact on national economic development, energy conservation and environmental protection. For semi-open centrifugal pumps, in addition to the efficiency, the lift at the dead point must also be considered. This invention proposes a design method for adding medium and short splitter vanes. Optimi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/24F04D29/66F04D29/68
CPCF04D29/242F04D29/669F04D29/688F04D7/04F04D29/2216F04D29/2288F04D29/30F05D2240/303
Inventor 刘厚林罗凯凯张子龙王成斌王勇王凯董亮谈明高
Owner JIANGSU UNIV
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