CN104912843B - A kind of mixed-flow pump impeller with working face ellipse exit edge of blade - Google Patents
A kind of mixed-flow pump impeller with working face ellipse exit edge of blade Download PDFInfo
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- CN104912843B CN104912843B CN201510339815.7A CN201510339815A CN104912843B CN 104912843 B CN104912843 B CN 104912843B CN 201510339815 A CN201510339815 A CN 201510339815A CN 104912843 B CN104912843 B CN 104912843B
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Abstract
The present invention relates to mixed-flow pump impellers, refer in particular to a kind of mixed-flow pump impeller with working face ellipse exit edge of blade, belong to field of fluid machinery.The mixed-flow pump impeller with working face ellipse exit edge of blade is made of front shroud, blade and back shroud, and blade is connected with front and rear cover plate, it is characterised in that：The ellipse exit edge of blade is located at the end of mixed-flow pump impeller blade, ellipse outlet side accounts for the 1/4 ~ 1/5 of entire length of blade, the oval circular arc of front side of vane and vacuum side of blade composition of oval exit edge of blade, the eccentricity e value ranges of oval circular arc are 0 ﹤ e ﹤ 1.The present invention exports side structural point from front side of vane is improved, oval exit edge of blade is used to change the original outlet shapes of mixed-flow pump impeller, so as to control its exit return-flow structure and be avoided, reduce the hydraulic loss of mixed-flow pump impeller, to achieve the purpose that mixed-flow pump Effec-tive Function.
Description
Technical field
The present invention relates to mixed-flow pump impellers, refer in particular to a kind of mixed-flow pump impeller with working face ellipse exit edge of blade,
Belong to field of fluid machinery.
Background technology
Mixed-flow pump belongs to one kind of pump-type, and performance and configuration aspects have centrifugation between centrifugal pump and axial-flow pump
The advantages of pump and both axial-flow pumps, the shortcomings that both compensating for；Mixed-flow pump, which has, uses flow, lift variation range big, efficiently
The features such as area is wide is thus widely used in the every field such as farmland discharging-irrigating, power station cooling system, space flight and aviation, but extensive utilization
But consume mass energy simultaneously, especially on large pumping station, therefore improve the energy characteristics of mixed-flow pump for national economy and
Energy-saving and emission-reduction suffer from extremely having important meaning；Due to mixed-flow pump development and production and with all with centrifugal pump, axial-flow pump
Compared to also a certain distance, advantage is not used flexibly also by more fields, and the impeller profile of mixed-flow pump is in sky
Between more complicated distorted shape is presented, design difficulty is larger, therefore develops energy-efficient, advanced structure and operates steadily mixed
Stream pump becomes the priority and difficulty problem of its design；After mixed flow impeller rotation, there is axial push away again to the existing centrifugal force of the effect of liquid
Power, motion state compares centrifugal pump and axial-flow pump is more complicated, fluid how to be made to be moved along vane type line more smooth, reduces
Return-flow structure in impeller so as to reduce the hydraulic loss of impeller internal, becomes the critical problem for improving mixed-flow pump energy characteristics.
In recent years blade tip clearance, impeller blade number, impeller blade laying angle are focused primarily upon for the research of mixed flow impeller
Influence of the variation to hydraulic performance with impeller blade thickness etc.；Guan Xingfan, normal book equality people are to impeller geometric parameter to pump
The influence of performance is studied, and for mixed-flow pump, impeller is the carrier of energy transmission, it is believed that its mechanism of action can be controlled effectively
Bad flowing inside system, and most of research at present explores different parameters to pump property all from optimization impeller geometric parameter
The influence of energy, but fail from the bad flowing angle in control mixed flow impeller internal flow structure；In order to realize to mixed flow
The effective control flowed in pump pump, to improve the efficiency and stability of energy transport and conversion between hydraulic part and fluid, therefore
Bad fluidal texture is of great significance to the performance for improving pump in control mixed-flow pump impeller.
Invention content
The present invention proposes a kind of oval with front side of vane from control mixed flow impeller exit edge of blade return-flow structure
Shape exports the mixed-flow pump impeller on side, changes front side of vane outlet side molded line, flows into fluid more uniform during impeller outlet,
The distribution of impeller internal flow is controlled, it is relatively simple reasonable that blade wheel structure changes, and easily implements on process operation, and
The hydraulic loss of impeller is effectively reduced, further improves the performance of mixed-flow pump.
The present invention proposes that there is a kind of band front side of vane ellipse to export side mixed-flow pump impeller.
The mixed-flow pump impeller with working face ellipse exit edge of blade is made of front shroud, blade and back shroud, leaf
Piece is connected with front and rear cover plate, which is located at the end of mixed-flow pump impeller blade, and ellipse outlet side accounts for whole
The 1/4 ~ 1/5 of a length of blade, the oval circular arc of front side of vane and vacuum side of blade composition of oval exit edge of blade, ellipse circle
The eccentricity e of arc, value range are 0 ﹤ e ﹤ 1.
Eccentricity e=c/a of the ellipse circular arc, wherein c are oval half focal length, and a is oval major semiaxis.
The blade is made of oval exit edge of blade and blade leading portion, the front side of vane of oval exit edge of blade
It is smoothly connected respectively with the front side of vane of blade leading portion and vacuum side of blade with vacuum side of blade.
The oval exit edge of blade is concordant with mixed-flow pump impeller outlet.
The eccentricity e of the oval circular arc is 0.2.
Advantage for present invention is：From front side of vane outlet side structure is improved, gone out using oval blade
Mouth side, so as to control its exit return-flow structure and be avoided, is made in impeller with changing the original outlet shapes of mixed-flow pump impeller
Portion flow field is more uniform, reduces the hydraulic loss of mixed-flow pump impeller, to achieve the purpose that mixed-flow pump Effec-tive Function, in processing side
Face, simple operability are also the advantages of it has.
Description of the drawings
Fig. 1 is the present invention with front side of vane ellipse outlet side mixed-flow pump impeller axis projection.
Fig. 2 is the plane projection for removing front shroud with front side of vane ellipse outlet side mixed flow impeller of the present invention
Figure.
Fig. 3 is the plane figure that the impeller with traditional mixed-flow pump blade exit shape removes front shroud.
Fig. 4 is the partial enlarged view proposed by the present invention that side is exported with front side of vane ellipse.
Fig. 5 is the partial enlarged view on conventional outlet side.
Fig. 6 has different leaves outlet shapes mixed-flow pump impeller performance comparison figure for two kinds.
1st, front shroud；2nd, blade；3rd, back shroud；4th, oval exit edge of blade；5th, front side of vane；6th, vacuum side of blade；
7th, the oval circular arc of oval exit edge of blade；8th, blade leading portion.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 and Fig. 2 gives proposed by the present invention with front side of vane ellipse outlet side mixed-flow pump impeller axial plane throwing
Shadow figure and the plane figure for removing front shroud 1, as seen from the figure：The mixed-flow pump leaf with working face ellipse exit edge of blade
Wheel is made of front shroud 1, blade 2 and back shroud 3, and blade 2 is connected with front and rear cover plate 1,3；The ellipse exit edge of blade 4
In the end of mixed-flow pump impeller blade, ellipse outlet side 4 accounts for the 1/4 ~ 1/5 of entire 2 length of blade, oval exit edge of blade
4 front side of vane 5 and vacuum side of blade 6 forms oval circular arc 7, the eccentricity e of oval circular arc 7, and value range is 0 ﹤ e ﹤ 1, ellipse
Eccentricity e=c/a of round arc 7, wherein c are oval half focal length, and a is oval major semiaxis；The case ellipse circle that the present invention provides
The eccentricity e of arc 7 is 0.2；Blade is made of oval exit edge of blade 4 and blade leading portion 8, oval exit edge of blade 4
Front side of vane 5 and vacuum side of blade 6 are smoothly connected respectively with the front side of vane of blade leading portion 85 and vacuum side of blade 6, ellipse
Exit edge of blade 4 is concordant with mixed-flow pump impeller outlet.
Fig. 3 gives the plane figure that the impeller with traditional mixed-flow pump blade exit shape removes front shroud.By scheming
It is found that there is larger thickness on traditional blades outlet side, and it is more uneven with blade transition, it is generated when may allow fluid flow runner
Reflux or the separation of flow.
Fig. 4, Fig. 5 give proposed by the present invention with front side of vane ellipse outlet side（On）With conventional outlet side
（Under）Partial enlarged view, have figure compare it is found that the present invention ellipse outlet side be smoothly connected with working face, reduce export side
Thickness, and transition is uniform；And there is larger thickness on the outlet side of traditional blades, does not smoothly transit with working face.
As shown in Figure 6：Using CFD numerical computations means to traditional mixed-flow pump impeller with going out with front side of vane ellipse
Mouth side impeller has carried out performance prediction comparison, at mixed-flow pump design point（Q/Q0=1.0）, using with front side of vane ellipse
Compared to conventional impellers, lift is basically unchanged shape outlet side impeller, and impeller adiabatic efficiency increases by 1.04 percentage points；Therefore the present invention changes
Impeller outlet fluidal texture has been apt to it, has reduced impeller internal flow losses, so as to improves the working efficiency of impeller.
Claims (4)
1. a kind of mixed-flow pump impeller with front side of vane ellipse outlet side, should have working face ellipse exit edge of blade
Mixed-flow pump impeller be made of front shroud, blade and back shroud, blade is connected with front and rear cover plate, it is characterised in that：The ellipse
Exit edge of blade is located at the end of mixed-flow pump impeller blade, and ellipse outlet side accounts for the 1/4~1/5 of entire length of blade, ellipse
The oval circular arc of front side of vane and vacuum side of blade composition of shape exit edge of blade, the eccentricity e values of oval circular arc are 0.2.
2. a kind of mixed-flow pump impeller with front side of vane ellipse outlet side as described in claim 1, it is characterised in that：
The eccentricity e=c/a of the ellipse circular arc, wherein c are oval half focal length, and a is oval major semiaxis.
3. a kind of mixed-flow pump impeller with front side of vane ellipse outlet side as described in claim 1, it is characterised in that：
The blade is made of oval exit edge of blade and blade leading portion, front side of vane and the blade back of the body of oval exit edge of blade
Face is smoothly connected respectively with the front side of vane of blade leading portion and vacuum side of blade.
4. a kind of mixed-flow pump impeller with front side of vane ellipse outlet side as described in claim 1, it is characterised in that：
The oval exit edge of blade is concordant with mixed-flow pump impeller outlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510339815.7A CN104912843B (en) | 2015-06-18 | 2015-06-18 | A kind of mixed-flow pump impeller with working face ellipse exit edge of blade |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510339815.7A CN104912843B (en) | 2015-06-18 | 2015-06-18 | A kind of mixed-flow pump impeller with working face ellipse exit edge of blade |
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| CN104912843A CN104912843A (en) | 2015-09-16 |
| CN104912843B true CN104912843B (en) | 2018-06-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106382248B (en) * | 2016-10-21 | 2018-11-02 | 江苏大学镇江流体工程装备技术研究院 | One type ellipse double suction, four runner impeller of pump |
| CN106989042A (en) * | 2017-05-24 | 2017-07-28 | 濮阳市华南重工科技有限公司 | A kind of mixed flow fan and its manufacture method |
| CN110513326B (en) * | 2019-08-27 | 2024-04-23 | 浙江理工大学 | Centrifugal pump impeller capable of actively controlling pressure pulsation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2274699Y (en) * | 1996-03-21 | 1998-02-18 | 孙敏超 | Centripetal turbine wheel radial and combined flow |
| JP2003083284A (en) * | 2001-09-12 | 2003-03-19 | Mitsubishi Heavy Ind Ltd | Pump |
| CN101418814A (en) * | 2008-09-25 | 2009-04-29 | 长沙天鹅工业泵股份有限公司 | Core-loosing highly effective energy-conserving vertical diagonal flow pump |
| JP5730649B2 (en) * | 2011-04-13 | 2015-06-10 | 株式会社日立製作所 | Impeller and turbomachine having the same |
| CN202483949U (en) * | 2011-12-31 | 2012-10-10 | 中国燃气涡轮研究院 | Impeller disk of axial-flow local ventilator |
| CN103032372B (en) * | 2012-12-21 | 2015-05-20 | 上海交通大学 | Elliptic blade edge-modeling system and elliptic blade edge-modeling method for impellers |
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