CN104832455A - Centrifugal pump impeller with round blade outlet sides - Google Patents
Centrifugal pump impeller with round blade outlet sides Download PDFInfo
- Publication number
- CN104832455A CN104832455A CN201510167938.7A CN201510167938A CN104832455A CN 104832455 A CN104832455 A CN 104832455A CN 201510167938 A CN201510167938 A CN 201510167938A CN 104832455 A CN104832455 A CN 104832455A
- Authority
- CN
- China
- Prior art keywords
- centrifugal pump
- blade
- edge
- impeller
- exit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2238—Special flow patterns
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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
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
- F04D29/245—Geometry, shape for special effects
Abstract
The invention relates to a centrifugal pump impeller, and belongs to the field of fluid machines. The centrifugal pump impeller with round blade outlet sides is composed of a front cover plate, a rear cover plate and blades; the blades are located between the front cover plate and the rear cover plate; and the centrifugal pump impeller is characterized in that blade working faces and blade back faces are intersected in the circumferential direction of the blade outlet sides to form the round blade outlet sides. Geometrical shapes of blade outlets are changed, so that a flow structure of an impeller outlet is controlled, and therefore blade outlet complex flow fields can be evenly reconstructed. Flowing of the impeller outlet is controlled, and therefore hydraulic losses of an impeller are reduced, and the aims of improving the performance of a centrifugal pump is achieved; and the centrifugal pump impeller has an important significance in improvement of the efficiency of the centrifugal pump.
Description
Technical field
The present invention relates to a kind of centrifugal pump impeller, belong to field of fluid machinery.
Background technique
Centrifugal pump is as one power consumption machinery, petrochemical industry, industry conveying, town water supply etc. is comprised in the every field of national economy, all in occupation of important function, pump is also the rich and influential family of power consumption simultaneously, its electric power consumed accounts for 1/3 of gross generation according to statistics, and therefore the energy consumption of raising to saving power and reduction entire society of efficiency of centrifugal pump has very positive meaning.
The centrifugal pump designed by conventional method, impeller blade outlet circumferential thickness is larger, cause the speed difference at blade exit working surface and the back side obvious, form significant tail probability series, this structure easily causes the energy dissipation of turbulent flow, therefore cause larger hydraulic loss, thus affect the hydraulic efficiency of centrifugal pump impeller; From centrifugal pump internal flow rule: the blade shape at impeller outlet place on the fluidal texture impact in this region significantly, which determine the size in tail probability series region and the speed difference at front side of vane and the back side, affect the efficiency of centrifugal pump impeller, thus have very important impact to performance of centrifugal pump.Therefore blade exit shape reasonable in design can improve the hydraulic efficiency of centrifugal pump impeller significantly, and then improves the efficiency of whole pump.
For the efficiency how improving centrifugal pump, the research of the current overwhelming majority is all by optimizing the different geometric parameter of impeller, reach the purpose of design of high-efficiency vane wheel, the present invention by changing blade exit geometrical shape to control the fluidal texture of impeller outlet, and then evenly reconstructs blade exit complex flowfield; The present invention by controlling impeller outlet flowing, thus reduces the hydraulic loss of impeller, reaches the object improving performance of centrifugal pump, has great significance to the efficiency improving centrifugal pump further.
Summary of the invention
The present invention is from control blade exit wake structure, by changing exit edge of blade shape to improve the bad wake of impeller outlet, evenly be reconstructed impeller outlet flow field structure, reach the object improving performance of centrifugal pump further, thus further improve centrifugal pump performance; The centrifugal pump impeller with circular blade Exit-edge that the present invention proposes has the features such as simple and reasonable for structure, easy to process, operation enforcement is easy.
A kind of centrifugal pump impeller with circular blade Exit-edge that the present invention proposes, is characterized in that: front side of vane and vacuum side of blade intersect at the circumferencial direction of exit edge of blade, form circular blade Exit-edge.
This centrifugal pump impeller with circular blade Exit-edge is made up of front shroud, back shroud and blade, and blade is between front and rear cover plate; This circular blade Exit-edge is positioned at the end of blade, and itself and front side of vane and vacuum side of blade smooth tangent; The outer margin contour of this circular blade Exit-edge flushes with impeller outlet; The radius R of this circular blade Exit-edge is determined by exit edge of blade thickness, and its span is generally 2-6mm.
Advantage of the present invention is: from improving blade exit tail probability series, adopt circular blade Exit-edge to change centrifugal pump impeller outlet shapes, thus the fluidal texture of adjustment blade exit, reduce the impeller hydraulic loss caused by bad wake, reach the object promoting performance of centrifugal pump; The centrifugal pump impeller with circular blade Exit-edge that the present invention simultaneously proposes has the features such as simple and reasonable for structure, easy to process, operation enforcement is easy.
Accompanying drawing explanation
Fig. 1 is a kind of axis projection with the centrifugal pump impeller of circular blade Exit-edge that the present invention proposes.
Fig. 2 is a kind of shaft section schematic diagram with the centrifugal pump impeller of circular blade Exit-edge that the present invention proposes.
Fig. 3 is the shaft section schematic diagram of the centrifugal pump impeller with traditional blades outlet shapes.
Fig. 4 is two kinds of performance comparison figure with different leaves outlet shapes centrifugal pump.
In figure 1, front shroud of impeller; 2, back shroud of impeller; 3, blade; 4, circular blade Exit-edge; 5, impeller outlet limit; 6, vacuum side of blade; 7, front side of vane.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 and Fig. 2 gives the present invention a kind of axial plane and the shaft section schematic diagram with the centrifugal pump impeller of circular blade Exit-edge proposed, as seen from the figure: this impeller blade is connected with impeller front and rear cover plate; This circular blade Exit-edge is positioned at the end of blade, and itself and front side of vane and vacuum side of blade smooth tangent; The outer margin contour of this circular blade Exit-edge flushes with impeller outlet; The radius R of this circular blade Exit-edge is 4mm.
Fig. 3 gives the centrifugal pump impeller with traditional blades outlet shapes: exit edge of blade working surface is separated at circumferencial direction with the back side, and exit edge of blade has larger thickness at circumferencial direction.
As shown in Figure 4: adopt CFD numerical calculation means to carry out performance prediction to the centrifugal pump that two kinds have different leaves outlet shapes, at Centrifugal Pump Design point place (Q/Q
d=1.0), after adopting circular blade Exit-edge, centrifugal pump whole efficiency improves 1.7 percentage points; Therefore present invention improves impeller outlet fluidal texture, thus reach the object reducing impeller outlet flow losses, and then improve centrifugal pump performance.
Claims (5)
1. one kind has the centrifugal pump impeller of circular blade Exit-edge, this centrifugal pump impeller with circular blade Exit-edge is made up of front shroud, back shroud and blade, blade is between front and rear cover plate, it is characterized in that: front side of vane and vacuum side of blade intersect at the circumferencial direction of exit edge of blade, form circular blade Exit-edge.
2. a kind of centrifugal pump impeller with circular blade Exit-edge as claimed in claim 1, is characterized in that: this circular blade Exit-edge is positioned at the end of blade, and itself and front side of vane and vacuum side of blade smooth tangent.
3. a kind of centrifugal pump impeller with circular blade Exit-edge as claimed in claim 1, is characterized in that: the outer margin contour of this circular blade Exit-edge flushes with impeller outlet.
4. a kind of centrifugal pump impeller with circular blade Exit-edge as claimed in claim 1, it is characterized in that: the radius R of this circular blade Exit-edge is determined by exit edge of blade thickness, its span is 2-6mm.
5. a kind of centrifugal pump impeller with circular blade Exit-edge as claimed in claim 1, it is characterized in that: the radius R of this circular blade Exit-edge is determined by exit edge of blade thickness, its span is 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510167938.7A CN104832455A (en) | 2015-04-10 | 2015-04-10 | Centrifugal pump impeller with round blade outlet sides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510167938.7A CN104832455A (en) | 2015-04-10 | 2015-04-10 | Centrifugal pump impeller with round blade outlet sides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104832455A true CN104832455A (en) | 2015-08-12 |
Family
ID=53810569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510167938.7A Pending CN104832455A (en) | 2015-04-10 | 2015-04-10 | Centrifugal pump impeller with round blade outlet sides |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104832455A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201771846U (en) * | 2010-07-09 | 2011-03-23 | 上海连成（集团）有限公司 | Low specific speed impeller |
| CN103161761A (en) * | 2011-12-16 | 2013-06-19 | 沈阳鼓风机集团股份有限公司 | Application of staggered spiral type design on volute |
| CN103423168A (en) * | 2013-07-24 | 2013-12-04 | 大连理工大学 | Hydraulic model of AP1000 filter screen back-flushing pump |
| WO2015000677A1 (en) * | 2013-07-02 | 2015-01-08 | Sulzer Pumpen Ag | Rotor for a centrifugal flow machine and a centrifugal flow machine |
-
2015
- 2015-04-10 CN CN201510167938.7A patent/CN104832455A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201771846U (en) * | 2010-07-09 | 2011-03-23 | 上海连成（集团）有限公司 | Low specific speed impeller |
| CN103161761A (en) * | 2011-12-16 | 2013-06-19 | 沈阳鼓风机集团股份有限公司 | Application of staggered spiral type design on volute |
| WO2015000677A1 (en) * | 2013-07-02 | 2015-01-08 | Sulzer Pumpen Ag | Rotor for a centrifugal flow machine and a centrifugal flow machine |
| CN103423168A (en) * | 2013-07-24 | 2013-12-04 | 大连理工大学 | Hydraulic model of AP1000 filter screen back-flushing pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150812 |
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| WD01 | Invention patent application deemed withdrawn after publication |