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Guide vanes with vortex elimination and drag reduction holes

A technology of drag-reducing holes and vortex elimination, applied in the field of hydraulic machinery, can solve problems such as the inability to eliminate the vortex from the root

Inactive Publication Date: 2014-09-17
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The auxiliary vane arranged in the middle of the suction surface of the guide vane blade can block the axial vortex, but cannot eliminate the vortex from the source

Method used

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  • Guide vanes with vortex elimination and drag reduction holes
  • Guide vanes with vortex elimination and drag reduction holes
  • Guide vanes with vortex elimination and drag reduction holes

Examples

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Embodiment Construction

[0024] 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.

[0025] figure 1 Shown is the application of the space guide vane with vortex elimination and drag reduction holes of the present invention in the single-stage pump section of deep well centrifugal pump. The number of resistance holes 3 is 1~3, and the specific number is determined according to the wrap angle of the space guide vane blade 4. When the guide vane wrap angle of the guide vane blade is less than 90 degrees, the number of vortex elimination and drag reduction holes 3 is one. When the guide vane wrap angle of the guide vane blade is greater than 90 degrees, the number of the vortex elimination and drag reduction holes 3 is 2-3; the diameter of the vortex elimination and drag reduction holes 3 is 2-5 mm.

[0026] figure 2 Shown is the top view of the space gui...

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Abstract

The invention relates to spatial guide vanes with vortex elimination and drag reduction holes, wherein the spatial guide vanes are used for a deep-well centrifugal pump or multistage centrifugal pumps in other forms. One to three semicircular holes with the same size are arranged in the root portion of each of the spatial guide vanes and close to a lower cover plate, and the vortex elimination and drag reduction holes penetrate through the pressure faces and the suction faces of the guide vanes and are inclined. The guide vanes with the vortex elimination and drag reduction holes are simple in structure and convenient to machine, high-speed liquid flow flows to the suction faces from the pressure faces through the vortex elimination and drag reduction holes, low-speed liquid remaining near the suction faces can be dispersed, the form of flow of the suction faces of the guide vanes close to the lower cover plate area can be effectively improved, the probability of generating secondary flow and vortexes is reduced, hydraulic loss is reduced, and the overflow efficiency of the guide vanes is remarkably improved.

Description

technical field [0001] The space guide vane involved in the invention is one of the key hydraulic components of a multistage centrifugal pump, and belongs to the field of hydraulic machinery. Background technique [0002] The space guide vane, also known as the guide casing, is located behind the impeller and together with the impeller constitutes the flow-passing part of the pump. Space guide vanes are widely used in deep well centrifugal pumps and guide vane mixed flow pumps. The main function of the space guide vane is to collect the liquid at the outlet of the impeller and transport it to the outlet or the suction port of the next stage impeller; reduce the velocity of the liquid flow and convert the velocity energy into pressure energy; eliminate the velocity circulation of the liquid flow as much as possible . Therefore, the space guide vane is an important speed-energy conversion device, and its design has a major impact on the performance of the pump. Some data sho...

Claims

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Application Information

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IPC IPC(8): F04D29/44
Inventor 周岭施卫东白玲陆伟刚代珣
Owner JIANGSU UNIV
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