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Two stage pump in type of combining guide vane with spiral case

A combined, two-stage pump technology, applied in non-variable-capacity pumps, non-displacement pumps, pumps, etc., can solve the problems of large guide vane structure, difficult manufacturing process, complex structure, etc., and achieve low manufacturing cost, The effect of easy casting and processing, and thin wall of the pump body

Inactive Publication Date: 2005-11-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] At present, the guide vane structure of ordinary two-stage pumps is large in size, complex in structure, difficult in manufacturing process, high in cost, poor in performance, low in efficiency, and heavy in handling.

Method used

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  • Two stage pump in type of combining guide vane with spiral case

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Embodiment Construction

[0008] exist figure 1 , when the guide vane volute combined double-stage pump shaft [10] rotates, the impeller is driven to work, the liquid enters the pump cover [4] and the inlet of the derotator [1], and the liquid encounters the derotator to play a derotation effect. At the same time, the liquid enters the first-stage impeller [3], and the high-speed liquid flowing out of the impeller channel enters the pump casing [6] and guide vane [5]. Since the area of ​​the guide vane channel is larger than the area of ​​the impeller channel, the velocity energy is converted into pressure at this time. It can eliminate the velocity circulation of the liquid, reduce the radial force, and then the liquid enters the final stage impeller [7], and then exits from the volute, and the pump works normally.

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Abstract

A two stage pump in type of combining guide vane with spiral case has structure of combination mode of entrance bucket and scroll casing, symmetrical radial entrance buckets are added at impeller outlet of the scroll casing which facilitated casting and processing, and support point of the pump axle is added at sucking inlet of the pump body, the pump operates reposefully. The operation principle is that when the pump operating, combination mode of entrance bucket and scroll casing is adopted which can ensure that the liquid in the impeller has stable relative movement, a majority of kinetic energy of the high speed liquid flowed from the impeller channel is converted into pressure energy, the speed circulation of the liquid is eliminated, radial force is reduced and efficiency of the pump is improved.

Description

technical field [0001] The invention relates to a fluid machine, especially a combined double-stage pump with a guide vane volute, which is mainly used in forest firefighting, long-distance water supply in plateau mountainous areas, industrial cleaning, farmland irrigation, spraying chemicals for agricultural and forestry crops, and the like. Background technique [0002] At present, the guide vane structure of ordinary two-stage pumps is large in size, complex in structure, difficult in manufacturing process, high in cost, poor in performance, low in efficiency, and heavy in handling. Contents of the invention [0003] In order to solve the problems existing in the existing two-stage pump, the present invention provides a combined guide vane and volute two-stage pump. Most of the kinetic energy of the high-speed liquid flowing out of the impeller channel is converted into pressure energy, which eliminates the velocity circulation of the liquid, reduces the radial force, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/44
Inventor 刘建瑞施卫东孔繁余
Owner JIANGSU UNIV
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