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A hydraulic design method for guide vanes of high specific speed axial flow pump

A high specific speed, hydraulic design technology, applied in the design field, can solve the problems that it is difficult to achieve the expected effect, the theoretical design and the actual model are different, so as to improve the utilization rate and hydraulic efficiency, prolong the service life and maintenance cycle, Effect of Optimizing Design Parameters

Active Publication Date: 2020-08-28
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing design method, the theoretical design and the actual model are quite different, and it is difficult to achieve the expected effect

Method used

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  • A hydraulic design method for guide vanes of high specific speed axial flow pump
  • A hydraulic design method for guide vanes of high specific speed axial flow pump
  • A hydraulic design method for guide vanes of high specific speed axial flow pump

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Embodiment Construction

[0076] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0077] The present invention uses the following formulas to determine the diffusion angle θ including the guide vane of the axial flow pump, and the inner diameter of the guide vane inlet D 3 , Outer diameter of guide vane inlet D 4 , the distance e between the inlet edge of the guide vane and the outlet edge of the impeller, the axial height H of the guide vane hub side d , the number of guide vane blades Z g , guide vane inlet placement angle α 3 , guide vane density l / t, guide vane inlet axial surface velocity υ m3 , guide vane profile radius R g . This embodiment is in a given design condition flow Q=0.35m 3 / s, design head H=6.72m, design speed n=1450r / min, calculate guide vane hydraulic parameters:

[0078]

[0079] D. 3 =6.466n s -0.402 D. 2 (2)

[0080]

[0081]

[0082]

[0083]

[0084] (l / t) 0 =3.292×10 ...

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Abstract

The present invention relates to a hydraulic design method for a guide vane of a high specific speed axial flow pump. The method comprises providing design formulae for main geometric parameters of the guide vane, including the parameters of the diffusion angle theta of the guide vane of the axial flow pump, the inner diameter D3 of the inlet of the guide vane, the outer diameter D4 of the inlet of the guide vane, the distance between the inlet side of the guide vane and the outlet side of the vane wheel, the axial height Hd of the hub side of the guide vane wheel, the number Zg of blades of the guide vane, the inlet setting angle [alpha]3 of the guide vane, the thick density l / t of the blades of the guide vane, the axial surface speed um3 of the inlet of the guide vane, and the profile radius Rg of the guide vane. According to the method disclosed by the present invention, by combining actual working conditions with the design conditions, design parameters are optimized, utilization and hydraulic efficiency of the water flow in the outlet of the vane wheel of the axial flow pump are improved, the service life and the maintenance cycle of the pump are extended, computer programming application and computer-aided design are facilitated, and a lot of time is saved for the design.

Description

technical field [0001] The invention relates to a design method of guide vanes of axial flow pumps, in particular to a hydraulic design method of guide vanes of high specific speed axial flow pumps. Background technique [0002] Axial flow pump is a kind of vane pump, which uses the force generated by the blades of the rotating impeller on the liquid to transport the liquid along the axial direction. Axial flow pump is the one with the highest specific speed among dynamic pumps, and the specific speed is between 500 and 1600. The specific speed of the high specific speed axial flow pump involved in the present invention is generally greater than 800, and is mainly suitable for super large flow occasions, such as irrigation, Waterlogging, dock drainage, water level regulation of canal locks, or as a large circulating water pump for power plants. [0003] After the liquid flows out from the impeller of the axial flow pump, it flows into the guide vane and the diffuser pipe. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F119/14
CPCG06F30/17
Inventor 朱荣生方杰付强王秀礼康俊鋆李杨邱伟峰
Owner JIANGSU UNIV
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