CN104481918A - Mixed flow impeller with suction side back blade - Google Patents
Mixed flow impeller with suction side back blade Download PDFInfo
- Publication number
- CN104481918A CN104481918A CN201410636407.3A CN201410636407A CN104481918A CN 104481918 A CN104481918 A CN 104481918A CN 201410636407 A CN201410636407 A CN 201410636407A CN 104481918 A CN104481918 A CN 104481918A
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- CN
- China
- Prior art keywords
- impeller
- suction surface
- surface back
- mixed flow
- vane
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
Abstract
The invention relates to a mixed flow pump, and in particular relates to a mixed flow impeller with a suction side back blade. The mixed flow impeller with the suction side back blade is characterized in that the suction side back blade is arranged between every two adjacent blades in a running channel of the mixed flow impeller; the suction side back blade is separated from a blade working surface and is mounted on the back surface of the blade. According to the mixed flow impeller with the suction side back blade, the suction side back blade is arranged in the running channel of the impeller and can be used for highly stopping any adverse axial flowing, so as to lower down the velocity gradient in the running channel; therefore, the uniformity of the structure of a flowing field of the running cannel of the impeller can be raised, and as a result, the performance of the pump can be further improved.
Description
Technical field
The present invention relates to mixed flow pump, refer in particular to a kind of mixed flow impeller with suction surface back vane.
Background technique
Mixed flow pump plays important role in the every field of national economy, its shape is between centrifugal pump and axial-flow pump, there is the advantages such as flow is large, lift is high, also consumes a large amount of electric power simultaneously, therefore improve mixed flow pump performance significant for the construction of Novel saving type society.The impeller profile of mixed flow pump presents complicated distorted shape in space, geometric parameter is very complicated, design difficulty is large, the relation that influences each other simultaneously between parameters is not also all understood fully at present, therefore mixed flow impeller design efficiently becomes the heavy difficulties of mixed flow pump design, mixed flow impeller internal flow is subject to the acting in conjunction of centrifugal force and lift, its motion state compares centrifugal pump and axial-flow pump is more complicated, how to make fluid along vane type line smooth motion, the hydraulic loss reducing impeller internal becomes the key issue improving pump performance.
The relative velocity distribution map exported from the conventional mixed flow impeller of accompanying drawing 5: the relative velocity of close back shroud of impeller is much larger than the relative velocity near front shroud of impeller, larger velocity gradient easily forms eddy's structure, cause larger hydraulic loss, reduce pump performance.Therefore how to control the fluidal texture that mixed-flow pump impeller is inner bad, reduce the velocity gradient of its inside, having reduction hydraulic loss and raising pump performance affects extremely significantly.
The current research for mixed flow impeller mainly concentrates on the optimization of the factors such as vane type line, geometric parameter, the number of blade, and the people such as Guan Xingfan, Lu Weigang, Shi Weidong are studied the impact of impeller geometric parameter on pump performance.Current major part research is all from optimization impeller geometric parameter, explore different parameters proportioning to the impact of pump performance, fail, from the bad fluidal texture of control mixed flow impeller, to reduce the hydraulic loss of impeller internal, thus the energy characteristics of pump can be improved further.Therefore the control of the harmful fluidal texture in mixed flow impeller inside has practical significance to raising pump performance.
Summary of the invention
In order to improve mixed flow pump performance further, the present invention is from controlling the inner bad axial flow of mixed flow impeller, a kind of mixed flow impeller with suction surface back vane is proposed, this blade wheel structure is simple, reasonable, effectively reduce the velocity gradient of impeller internal, evenly be reconstructed the Flow Field Distribution of impeller internal, reduce the hydraulic loss of impeller, further improve mixed flow pump performance.
The present invention proposes a kind of mixed flow impeller with suction surface back vane.
This suction surface back vane between adjacent two blades, is separated with front side of vane in mixed flow impeller runner, is arranged on vacuum side of blade, is uniformly distributed along the circumference, and the axial plane shape of this suction surface back vane is identical with back shroud of impeller streamline.
The outlet of this suction surface back vane and impeller outlet flush, and thickness is even, and suitable with blade average thickness, and its number is identical with impeller blade number.
This suction surface back vane is away from front shroud of impeller, and more near back shroud of impeller, its Exit-edge is 1/4 ~ 1/2 of impeller outlet width apart from the distance of back shroud of impeller.
The circumferential length a of this suction surface back vane Exit-edge is 1/4 ~ 3/4 of arc length between adjacent blades, and the ratio that its inlet side circumferential length b accounts for inlet side place runner circumferential length is identical with Exit-edge, and its radial length c is 1/4 ~ 3/4 of blade radial length d.
This structure, by controlling the axial flow of liquid hazardous in mixed flow impeller runner, reduces velocity gradient, evenly reconstructs to realize impeller internal flow, reduces hydraulic loss, reaches the object of elevator pump performance.
Advantage of the present invention is: from the bad axial flow of control impeller internal, by arranging suction surface back vane structure in impeller channel, blocking bad axial flow by force, reducing the velocity gradient in runner, make the flow field structure of impeller channel more even, improve pump performance further.The present invention simultaneously also has the advantages such as simple and reasonable for structure, easy to process.
Accompanying drawing explanation
Fig. 1 is the mixed flow impeller axis projection of band suction surface back vane of the present invention.
Fig. 2 is the mixed flow impeller plane figure of band suction surface back vane of the present invention.
Fig. 3 is the plane outspread drawing of the mixed flow impeller outlet flow flow section of band suction surface back vane of the present invention.
Fig. 4 is the mixed flow impeller outlet relative velocity distributed architecture figure of band suction surface back vane of the present invention.
Fig. 5 is traditional mixed flow impeller outlet relative velocity distributed architecture figure.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 gives the axis projection of mixed flow impeller, as seen from the figure: this suction surface back vane 3 is away from front shroud of impeller 1, more near back shroud of impeller 2, its axial plane shape is identical with back shroud streamline shape, its Exit-edge is 1/2 of impeller outlet width apart from the distance of back shroud of impeller, and its radial length is 1/2 of blade radial length.
As shown in Figure 2: this suction surface back vane is connected with vacuum side of blade 5, be separated with front side of vane 4, its number is equal with impeller blade number, be taken as 5, suction surface back vane is evenly distributed between each runner of impeller, its thickness is equal with blade average thickness, is taken as 4mm, and its Exit-edge and impeller outlet 6 flush.
Fig. 3 gives the plane outspread drawing of impeller outlet runner flow section, the circumferential length a of this suction surface back vane Exit-edge is 65.2% of arc length between adjacent blades, its inlet side circumferential length b is similarly 65.2% of inlet side place runner circumferential length, and its radial length is 50% of blade radial length.
Fig. 5 gives traditional mixed flow impeller outlet relative velocity distributed architecture and knows: the relative velocity of close back shroud of impeller is much larger than the relative velocity near front shroud of impeller, larger velocity gradient easily forms eddy's structure, cause larger hydraulic loss, reduce pump performance.
As shown in Figure 4: after increasing suction surface back vane, the axial flow of impeller internal is intercepted by force, impeller outlet Flow Field Distribution is more even, and velocity gradient is little, therefore effectively can reduce the hydraulic loss of impeller internal, improve whole pump performance.Therefore control the fluidal texture of mixed-flow pump impeller inside, reduce the velocity gradient of its inside, having reduction hydraulic loss and raising pump performance affects extremely significantly.
Adopt CFD means to predict pump performance in this example, under identical impeller and spiral case condition, at mixed flow pump design point place, after adopting suction surface back vane structure, mixed flow lift of pump is substantially constant, and efficiency improves 2.5%.
Present invention improves impeller internal fluidal texture, thus reach the object reducing pump internal flow loss, and then improve pump performance.
Claims (5)
1. the mixed flow impeller with suction surface back vane, it is characterized in that: in mixed flow impeller runner, be provided with suction surface back vane between adjacent two blades, suction surface back vane is separated with front side of vane, be arranged on vacuum side of blade, by arranging suction surface back vane structure in impeller channel, blocking bad axial flow by force, reducing the velocity gradient in runner, make the flow field structure of impeller channel more even, improve pump performance further.
2. a kind of mixed flow impeller with suction surface back vane as claimed in claim 1, it is characterized in that: described suction surface back vane is uniformly distributed along the circumference, its number is identical with impeller blade number, and the axial plane shape of suction surface back vane is identical with back shroud of impeller streamline.
3. a kind of mixed flow impeller with suction surface back vane as claimed in claim 1, is characterized in that: described suction surface back vane outlet and impeller outlet flush, and thickness is even, and suitable with blade average thickness.
4. a kind of mixed flow impeller with suction surface back vane as claimed in claim 1, it is characterized in that: described suction surface back vane is away from front shroud of impeller, more near back shroud of impeller, its Exit-edge is 1/4 ~ 1/2 of impeller outlet width apart from the distance of back shroud of impeller.
5. a kind of mixed flow impeller with suction surface back vane as claimed in claim 1, it is characterized in that: the circumferential length a of described suction surface back vane Exit-edge is 1/4 ~ 3/4 of arc length between adjacent blades, the ratio that its inlet side circumferential length b accounts for inlet side place runner circumferential length is identical with Exit-edge, and its radial length c is 1/4 ~ 3/4 of blade radial length d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410636407.3A CN104481918B (en) | 2014-11-13 | 2014-11-13 | Mixed flow impeller with suction side back blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410636407.3A CN104481918B (en) | 2014-11-13 | 2014-11-13 | Mixed flow impeller with suction side back blade |
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| Publication Number | Publication Date |
|---|---|
| CN104481918A true CN104481918A (en) | 2015-04-01 |
| CN104481918B CN104481918B (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410636407.3A Active CN104481918B (en) | 2014-11-13 | 2014-11-13 | Mixed flow impeller with suction side back blade |
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| CN (1) | CN104481918B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640742A (en) * | 2016-12-06 | 2017-05-10 | 西华大学 | Spiral axial-flow type oil-gas multiphase pump impeller |
| 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 |
| CN108150448A (en) * | 2017-10-19 | 2018-06-12 | 浙江理工大学 | A kind of method for designing impeller of not equidistant runner pump |
| CN108843621A (en) * | 2018-08-02 | 2018-11-20 | 榆林学院 | A kind of spatial guide blade with guide face partition |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR412047A (en) * | 1910-01-29 | 1910-07-01 | Georges Marie Capell | Improvements to impellers for centrifugal pumps and fans |
| CN1088667A (en) * | 1992-12-16 | 1994-06-29 | 新典自动化股份有限公司 | The axial flow flabellum of tool deflecting wing rib |
| US20070048123A1 (en) * | 2005-08-24 | 2007-03-01 | Delta Electronics, Inc. | Fan housing |
| JP2009079547A (en) * | 2007-09-26 | 2009-04-16 | Hitachi Plant Technologies Ltd | Mixed flow pump |
| CN202659570U (en) * | 2012-06-11 | 2013-01-09 | 广东美的制冷设备有限公司 | Axial wind wheel |
| CN103016410A (en) * | 2013-01-04 | 2013-04-03 | 江苏大学 | Space guide vane body with suction surface back vane |
-
2014
- 2014-11-13 CN CN201410636407.3A patent/CN104481918B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR412047A (en) * | 1910-01-29 | 1910-07-01 | Georges Marie Capell | Improvements to impellers for centrifugal pumps and fans |
| CN1088667A (en) * | 1992-12-16 | 1994-06-29 | 新典自动化股份有限公司 | The axial flow flabellum of tool deflecting wing rib |
| US20070048123A1 (en) * | 2005-08-24 | 2007-03-01 | Delta Electronics, Inc. | Fan housing |
| JP2009079547A (en) * | 2007-09-26 | 2009-04-16 | Hitachi Plant Technologies Ltd | Mixed flow pump |
| CN202659570U (en) * | 2012-06-11 | 2013-01-09 | 广东美的制冷设备有限公司 | Axial wind wheel |
| CN103016410A (en) * | 2013-01-04 | 2013-04-03 | 江苏大学 | Space guide vane body with suction surface back vane |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640742A (en) * | 2016-12-06 | 2017-05-10 | 西华大学 | Spiral axial-flow type oil-gas multiphase pump impeller |
| CN106640742B (en) * | 2016-12-06 | 2022-10-11 | 西华大学 | Spiral axial-flow type oil-gas mixed transportation pump impeller |
| 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 |
| CN108150448A (en) * | 2017-10-19 | 2018-06-12 | 浙江理工大学 | A kind of method for designing impeller of not equidistant runner pump |
| CN108150448B (en) * | 2017-10-19 | 2023-09-29 | 浙江理工大学 | Impeller design method of unequal-spacing runner pump |
| CN108843621A (en) * | 2018-08-02 | 2018-11-20 | 榆林学院 | A kind of spatial guide blade with guide face partition |
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| Publication number | Publication date |
|---|---|
| CN104481918B (en) | 2017-02-15 |
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