A kind of centrifugal pump with diversion structure

A technology of centrifugal pumps and deflector surfaces, which is applied to parts, pumps, and pump components of pumping devices used for elastic fluids, and can solve the problems of environmental pollution and large hydrodynamic noise of centrifugal pumps, etc., to reduce pollution, Effect of reducing wear and weakening unsteady flow phenomena

Active Publication Date: 2021-04-02
JIANGSU UNIV ZHENJIANG RES INST OF FLUID ENG EQUIP TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention aims to solve the technical problems that the existing centrifugal pumps have high hydrodynamic noise and pollute the surrounding environment

Method used

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  • A kind of centrifugal pump with diversion structure
  • A kind of centrifugal pump with diversion structure
  • A kind of centrifugal pump with diversion structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] combine Figure 1-Figure 4 As shown, a centrifugal pump with a guide structure includes a pump body 1 and at least one guide vane, the outlet end of the pump body 1 has a diffuser section 101, and the at least one guide vane is along the preset liquid flow direction set in the diffusion section 101;

[0046] The guide vane is an arc-arch structure, and the guide vane includes a leading edge guide curve section e, a middle guide curve connecting section g and a trailing edge guide straight section f connected in sequence.

[0047] The guide vane has a first guide surface, the first guide surface is a convex surface of the guide vane, and the first guide surface is provided with a plurality of guide grooves along the preset liquid flow direction.

[0048] The guide grooves are evenly arranged along the profile of the guide vanes, and the section of the guide grooves is perpendicular to the profile of the guide vanes.

[0049] The widths of the plurality of diversion gro...

Embodiment 2

[0071] combined with figure 1 , 2 , 3 and 4, taking a centrifugal pump with a specific speed of 158 as an example, its design parameters are: design flow Qd=330m3 / h, head H=35m, speed n=2792r / min.

[0072] The outlet diameter D of the diffuser section 101 of the pump body 1 d =280mm, the height of the diffusion section 101 of the pump body 1 H'=300mm, the divergence angle of the flow channel ε=8°;

[0073] The theoretical outlet width of the guide vane is B=65mm, and the proportional coefficient is k=1.0;

[0074] Inlet placement angle of guide vane α 1 =40°, the outlet placement angle of guide vane α 2 =90°, the inclination α of the leading edge guide curve section e of the guide vane 3 =70°.

[0075] Guide vane outlet width B 2 =65mm, inlet width B of guide vane 1 =42mm, the inlet height h=150mm of the guide vane, the thickness t=5mm of the guide vane;

[0076] Profile height h of the leading edge diversion curve segment e 1 = 0.6h = 90mm, profile height h of the t...

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Abstract

The invention discloses a centrifugal pump with a flow-guiding structure. The centrifugal pump comprises a pump body and one or more flow-guiding blades, a diffusion segment is arranged at the outletend of the pump body, and the one or more flow-guiding blades are arranged in the diffusion segment in the preset liquid flowing direction; and the flow-guiding blades are each of an arc-arch-shaped structure and each comprise a front-edge flow guiding curve segment, a middle flow guiding curve connection segment and a rear-edge flow guiding line segment which are sequentially connected. The diffusion segment of the pump body of the centrifugal pump is provided with the flow-guiding blades, unstable flowing at the outlet end of the pump can be effectively weakened, then hydrodynamic noise in the centrifugal pump due to turbulent fluctuation, cavitation, rotating stall, dynamic and static interference and other factors is effectively weakened, and pollution of the hydrodynamic noise of thepump on the surrounding environment is lowered.

Description

technical field [0001] The invention relates to the field of hydrodynamic noise reduction of centrifugal pumps, in particular to a centrifugal pump with a diversion structure. Background technique [0002] Centrifugal pumps are important fluid conveying equipment, widely used in petrochemical, aerospace, shipbuilding, urban water supply and other fields of the national economy. They consume a large amount and generate a lot of noise. However, with the development of the country's economic and technological level and the gradual improvement of people's environmental awareness, the noise reduction technology of centrifugal pumps has gradually become an important indicator of pump design. The noise of centrifugal pumps includes mechanical vibration noise and hydrodynamic noise. At present, with the rapid development of three-dimensional digital design, numerical control machining technology and active control technology, the mechanical vibration and noise of centrifugal pumps ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/44F04D29/66
CPCF04D29/448F04D29/669
Inventor 刘厚林马齐江王凯马皓晨谈明高王勇董亮
Owner JIANGSU UNIV ZHENJIANG RES INST OF FLUID ENG EQUIP TECH
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