CN101813092A - Multi-impeller combination hydraulic design method of multistage centrifugal pump - Google Patents
Multi-impeller combination hydraulic design method of multistage centrifugal pump Download PDFInfo
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- CN101813092A CN101813092A CN201010151536A CN201010151536A CN101813092A CN 101813092 A CN101813092 A CN 101813092A CN 201010151536 A CN201010151536 A CN 201010151536A CN 201010151536 A CN201010151536 A CN 201010151536A CN 101813092 A CN101813092 A CN 101813092A
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- centrifugal pump
- impeller
- multistage centrifugal
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Abstract
The invention provides a multi-impeller combination hydraulic design method of multistage centrifugal pump, which is characterized by adopting mode of three or more impeller hydraulic model combination; matching hydraulic models and the number of impellers to realize the changing and adjustment Q-H curve so as to obtain the required Q-H curve and to meet the required performance parameters. The multistage centrifugal pump impellers have at least three stages, the number of multistage centrifugal pump impellers is not less than three, and the number of multi-stage centrifugal pump hydraulic models is not less than three. The invention can ensure the coherence of actual operating performance curve and required performance curve of the centrifugal pump, can realize the multi-stage centrifugal pump hydraulic design with strict requirement to performance parameter, can adjust the performance parameter, and at the same time, realizes multi-stage centrifugal pump multi-operating point hydraulic design.
Description
Technical field
The present invention relates to a kind of multi-impeller combination hydraulic design method of multistage centrifugal pump, be particularly useful for the multistage centrifugal pump waterpower design strict performance parameter.
Background technique
Tradition multistage centrifugal pump flow passage components at different levels all adopt identical a kind of hydraulic model, if need improve the cavitation performance of pump, then can adopt the design proposal of two kinds of hydraulic model combinations, and promptly chopped-off head is different with all the other geometric parameters at different levels.For guaranteeing that two kinds of hydraulic models all in efficient district's work, require the optimal working point flow of two kinds of hydraulic models identical or close.The Hydraulic Design Method of tradition multistage centrifugal pump is difficult to meet the demands to the strict multistage centrifugal pump of performance parameter, does not more and more meet complicated day by day production needs.
Summary of the invention
The objective of the invention is provides a kind of multi-impeller combination hydraulic design method of multistage centrifugal pump for overcoming existing multistage centrifugal pump in the deficiency aspect the waterpower designing technique, according to said method can carry out the waterpower design to the strict multistage centrifugal pump of performance parameter.
The technical solution used in the present invention is: the mode that adopts impeller hydraulic model combination more than three kinds in the design of multistage centrifugal pump waterpower, by hydraulic model and impeller number are suitably mated, can realize changing and adjusting the Q-H curve, obtain needed Q-H curve, satisfy desired performance parameter.At least three grades of described multistage centrifugal pump impeller progression, described multistage centrifugal pump impeller quantity is no less than three, and described multistage centrifugal pump hydraulic model quantity is no less than three kinds.
The present invention and prior art contrast, and its effect is actively significantly.The present invention adopts multiple impeller combination to carry out the design of multistage centrifugal pump waterpower, can realize the multistage centrifugal pump waterpower design strict to performance parameter, and can adjust performance parameter, has also realized the design of multistage centrifugal pump multi-operating mode point waterpower simultaneously.
Description of drawings
The present invention is further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is the multistage centrifugal pump structural representation that is used for of the present invention.
Among the figure: 1. outer casing; 2. water outlet; 3. bearing; The axle; 5. mechanical seal; 6. first stage impeller; 7. inferior level impeller; 8. stator; 9. sliding bearing.
Fig. 2 is the performance parameter that multistage centrifugal pump of the present invention obtains.
Embodiment:
As shown in Figure 1, horizontal multi-stage double casing volute pump structure of the present invention, totally 12 grades in impeller, 1～4 grade of impeller forward is arranged, suction port is towards motor, 5～12 grades of impeller reversed arrangement, forward axial force of impeller and axle head high pressure water active force sum, balance each other with the reverse impeller axial force, the liquid stream between the positive and negative impeller is linked to each other by the inner flow passage on the stator.The impeller hydraulic model adopts three kinds of design proposal combinations, and scheme 1 is first stage impeller (totally 1 grade), and scheme 2 is 2～4 grades of impellers, and totally 3 grades, scheme 3 is 5～12 grades of impellers, totally 8 grades.Scheme 1 is considered cavitation performance, suction eye maximum; Scheme 2 is taken into account efficient, and suction eye is moderate; Scheme 3 is regulated lift, suction eye minimum.By three kinds of scheme combination, finally reach the performance parameter that requires.
Further, the design of first stage impeller waterpower the time need be considered cavitation performance, determines impeller outlet width according to rated flow, determines the impeller inlet diameter according to peak rate of flow, and impeller outer diameter adopts identical with external diameter in other two kinds of impeller schemes.
Further, for improving cavitation performance, the number of blade z of first stage impeller gets the small value, and determines s by impeller material
U1, determine the pump shaft diameter by the pump shaft material, determine impeller hub diameter D by axle key height and wheel hub intensity
h
Further, for improving cavitation performance, need to strengthen first stage impeller inlet diameter D
j, D
jBy peak rate of flow design, impeller outlet width b
2Determine by rated flow.
Further, the hydraulic performance that impeller is 2～4 grades will be taken into account efficient, and the number of blade gets the small value, and with the control head curve, determines impeller outer diameter D by closing dead lift
2With blade exit laying angle β
2
Further, 5～12 grades of main effects of waterpower design of impeller are to regulate lift.Determine impeller outer diameter D by closing dead lift
2With blade exit laying angle β
2
Fig. 2 designs resulting performance parameter curve for multistage centrifugal pump waterpower in the embodiment of the invention.
Claims (5)
1. multi-impeller combination hydraulic design method of multistage centrifugal pump, it is characterized in that in the design of multistage centrifugal pump waterpower, adopting the mode of impeller hydraulic model combination more than three kinds, by hydraulic model and impeller number are suitably mated, can realize changing and adjusting the Q-H curve, obtain needed Q-H curve, satisfy desired performance parameter.At least three grades of described multistage centrifugal pump impeller progression, described multistage centrifugal pump impeller quantity is no less than three, and described multistage centrifugal pump hydraulic model quantity is no less than three kinds.
2. a kind of multi-impeller combination hydraulic design method of multistage centrifugal pump as claimed in claim 1 is characterized in that adopting the mode that the impeller hydraulic model makes up more than three kinds in the design of multistage centrifugal pump waterpower.
3. a kind of multi-impeller combination hydraulic design method of multistage centrifugal pump as claimed in claim 1 is characterized in that at least three grades of multistage centrifugal pump impeller progression.
4. a kind of multi-impeller combination hydraulic design method of multistage centrifugal pump as claimed in claim 1 is characterized in that multistage centrifugal pump impeller quantity is no less than three.
5. a kind of multi-impeller combination hydraulic design method of multistage centrifugal pump as claimed in claim 1 is characterized in that multistage centrifugal pump hydraulic model quantity is no less than three kinds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010151536A CN101813092A (en) | 2010-04-19 | 2010-04-19 | Multi-impeller combination hydraulic design method of multistage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010151536A CN101813092A (en) | 2010-04-19 | 2010-04-19 | Multi-impeller combination hydraulic design method of multistage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101813092A true CN101813092A (en) | 2010-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010151536A Pending CN101813092A (en) | 2010-04-19 | 2010-04-19 | Multi-impeller combination hydraulic design method of multistage centrifugal pump |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102465882A (en) * | 2010-11-10 | 2012-05-23 | 上海福思特流体机械有限公司 | Multi-stage centrifugal pump with improved impeller arrangement |
| CN104074801A (en) * | 2013-03-26 | 2014-10-01 | 株式会社荏原制作所 | Multi-stage pump |
| CN104791260A (en) * | 2015-04-23 | 2015-07-22 | 江苏大学 | Multi-working-condition hydraulic design method for controllable centrifugal pump |
| CN107066686A (en) * | 2017-02-22 | 2017-08-18 | 江苏大学 | A kind of axial-flow pump impeller Hydraulic Optimizing Design method based on genetic algorithm |
| CN111734649A (en) * | 2020-06-19 | 2020-10-02 | 上海电气凯士比核电泵阀有限公司 | Test method and test equipment for hydraulic model combination of rotary power pump |
-
2010
- 2010-04-19 CN CN201010151536A patent/CN101813092A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102465882A (en) * | 2010-11-10 | 2012-05-23 | 上海福思特流体机械有限公司 | Multi-stage centrifugal pump with improved impeller arrangement |
| CN104074801A (en) * | 2013-03-26 | 2014-10-01 | 株式会社荏原制作所 | Multi-stage pump |
| CN104074801B (en) * | 2013-03-26 | 2017-09-19 | 株式会社荏原制作所 | Multistage pump |
| CN104791260A (en) * | 2015-04-23 | 2015-07-22 | 江苏大学 | Multi-working-condition hydraulic design method for controllable centrifugal pump |
| CN104791260B (en) * | 2015-04-23 | 2016-11-30 | 江苏大学 | A kind of controllable centrifugal pump multi-state Hydraulic Design Method |
| CN107066686A (en) * | 2017-02-22 | 2017-08-18 | 江苏大学 | A kind of axial-flow pump impeller Hydraulic Optimizing Design method based on genetic algorithm |
| CN107066686B (en) * | 2017-02-22 | 2020-09-25 | 江苏大学 | Axial flow pump impeller hydraulic optimization design method based on genetic algorithm |
| CN111734649A (en) * | 2020-06-19 | 2020-10-02 | 上海电气凯士比核电泵阀有限公司 | Test method and test equipment for hydraulic model combination of rotary power pump |
| CN111734649B (en) * | 2020-06-19 | 2021-08-27 | 上海电气凯士比核电泵阀有限公司 | Test method and test equipment for hydraulic model combination of rotary power pump |
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Application publication date: 20100825 |