CN102297153A - Method for improving lifting capacity of large-flow region of centrifugal pump - Google Patents
Method for improving lifting capacity of large-flow region of centrifugal pump Download PDFInfo
- Publication number
- CN102297153A CN102297153A CN2011102004840A CN201110200484A CN102297153A CN 102297153 A CN102297153 A CN 102297153A CN 2011102004840 A CN2011102004840 A CN 2011102004840A CN 201110200484 A CN201110200484 A CN 201110200484A CN 102297153 A CN102297153 A CN 102297153A
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- Prior art keywords
- pump
- impeller
- flow region
- centrifugal pump
- lifting capacity
- 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.)
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Abstract
The invention discloses a method for improving the lifting capacity of a large-flow region of a centrifugal pump. The method comprises the following steps of: enlarging the size of a vane wheel; and cutting the outer diameter of the enlarged vane wheel to be equal to the outer diameter of the vane wheel before enlargement. When the vane wheel of the pump cannot be enlarged in a radial direction or a requirement cannot be met by shaping and polishing vanes, the lifting capacity of the pump in the large-flow region can be improved by using the method. The method can be used for remarkably and effectively improving the lifting capacity of the large-flow region of the centrifugal pump.
Description
Technical field
The present invention relates to a kind of method that improves centrifugal pump high volume district lift.
Background technique
When existing pump is transformed, often run into the requirement pump case and the unit installation conditions is constant, impeller outer diameter can not strengthen, and requires to improve pumping head; Or increase pump operation flow; Or requirement reduces the pump lift of closing point.
Summary of the invention
The method of lift when technical problem to be solved by this invention provides the centrifugal pump high volume of remarkable, the simple raising of a kind of effect district.
In order to solve the problems of the technologies described above, the method for the centrifugal pump high volume of raising provided by the invention district lift impeller is carried out size amplify, and then the impeller outer diameter after will amplifying cuts to the impeller outer diameter before amplifying.
Adopt the method for the centrifugal pump high volume of the raising district lift of technique scheme, cutting again after impeller is amplified when keeping impeller outer diameter constant, can improve pump pumping head when big flow district.When pump impeller can not strengthen in radial direction, or adopt and repair file, when the polishing blade can not meet the demands, can adopt the method to improve the lift of pump when flow district greatly.Also can be used for increasing the pump operation flow or reduce the pump lift of closing point.
The method of lift when in sum, the present invention is the centrifugal pump high volume of remarkable, the simple raising of a kind of effect district.
Description of drawings
Fig. 1 is archetypal pump and improves the pump performance plotted curve;
Fig. 2 is archetypal pump and the operating conditions plotted curve that improves pump;
Fig. 3 is the operating conditions plotted curve that improves pump and cutting pump.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Improve the method for centrifugal pump high volume district lift, impeller is carried out size amplify, and then the external diameter of the impeller after will amplifying cuts to the impeller outer diameter before amplifying.
When the function admirable of archetypal pump, cutting again after impeller amplified when keeping impeller outer diameter constant, can improve pump pumping head when big flow district.
When pump impeller can not strengthen in radial direction, or adopt and repair file, when the polishing blade can not meet the demands, can adopt the method to improve the lift of pump when flow district greatly.
The archetypal pump impeller is amplified, pick and place big coefficient lambda
1, λ
1＞1.To amplify λ
1The time pump impeller in cut coverage, cut λ
2After can pack in the archetypal pump pump case, claim this pump for improving pump.
If Q, H, P, n, η, D are respectively flow, lift, air horsepower, rotating speed, efficient, the impeller outer diameter of pump, band footmark m interval scale archetypal pump, band footmark ' interval scale improvement pump.
When rotating speed is constant, can get by deriving:
Q’＝λ
1 3λ
2Q
m H’＝λ
1 2λ
2 2H
m D’＝λ
1λ
2D
m
P’＝λ
1 5λ
2 3P
m η’＝η
m
When archetypal pump with improve pump and keep impeller outer diameter constant, be i.e. λ
1λ
2=1 o'clock, then have:
Q’＝λ
1 2Q
m H’＝H
m P’＝λ
1 2P
m η’＝η
m
As can be known, pump duty and power gain increase from square ground when pumping head is constant from formula.
The property relationship of archetypal pump and improvement lift of pump, efficient, air horsepower and flow is depicted as curve, sees Fig. 1.
As can be seen from Figure 1: improve pump and compare with archetypal pump, pumping head increases with the increase of flow when same traffic; Almost behind the archetypal pump best efficiency point, pump efficiency increases with the increase of flow; Efficient district is toward big flow translation; The air horsepower of pump increases to some extent.
By property comparison, also the method can be used for increasing the transformation of pump duty.When requiring archetypal pump with sufficient power of motor the time, to increase pump duty as far as possible, under the situation that the pump case width of flow path allows, can adopt the method to increase pump duty as far as possible.As can be seen from Figure 2: when the equipment energy characteristic curve was constant, to some B, pump duty increased the operating point of pump by an A, and efficient does not reduce.
By property comparison, when having requirement to the pump lift of closing point and need to reduce the pump lift of closing point, system can consider to adopt the method to make curve become more smooth by falling suddenly.When the equipment energy characteristic curve is constant as can be seen from Figure 3: the impeller that will improve pump cuts again, and head curve becomes H by H ' ", the operating point of pump is still the A point, the pump lift of closing point has then descended.
When pump case allow to be improved the pump impeller external diameter and can be increased, i.e. λ
1λ
2＞1 o'clock, then being more conducive to lift increased.
Claims (1)
1. a method that improves centrifugal pump high volume district lift is characterized in that: impeller is carried out size amplify, and then the external diameter of the impeller after will amplifying cuts to the external diameter of the impeller before amplifying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102004840A CN102297153A (en) | 2011-07-18 | 2011-07-18 | Method for improving lifting capacity of large-flow region of centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102004840A CN102297153A (en) | 2011-07-18 | 2011-07-18 | Method for improving lifting capacity of large-flow region of centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102297153A true CN102297153A (en) | 2011-12-28 |
Family
ID=45357772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102004840A Pending CN102297153A (en) | 2011-07-18 | 2011-07-18 | Method for improving lifting capacity of large-flow region of centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102297153A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04334796A (en) * | 1991-05-02 | 1992-11-20 | Tsurumi Mfg Co Ltd | Impeller for motor-driven centrifugal pump |
| CN1136141A (en) * | 1996-02-15 | 1996-11-20 | 北京风机二厂 | Method and products for producing centrifugal blowers of fluid-bed boiler by performance block diagram |
| CN2297571Y (en) * | 1996-11-19 | 1998-11-18 | 山东省宁津县机械厂 | Single stage centrifugal pump |
| CN201196151Y (en) * | 2007-12-04 | 2009-02-18 | 广州水泵厂 | Centrifugal self-suction pump |
| CN102116299A (en) * | 2009-12-31 | 2011-07-06 | 广州水泵厂 | Centrifugal self-priming pump |
-
2011
- 2011-07-18 CN CN2011102004840A patent/CN102297153A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04334796A (en) * | 1991-05-02 | 1992-11-20 | Tsurumi Mfg Co Ltd | Impeller for motor-driven centrifugal pump |
| CN1136141A (en) * | 1996-02-15 | 1996-11-20 | 北京风机二厂 | Method and products for producing centrifugal blowers of fluid-bed boiler by performance block diagram |
| CN2297571Y (en) * | 1996-11-19 | 1998-11-18 | 山东省宁津县机械厂 | Single stage centrifugal pump |
| CN201196151Y (en) * | 2007-12-04 | 2009-02-18 | 广州水泵厂 | Centrifugal self-suction pump |
| CN102116299A (en) * | 2009-12-31 | 2011-07-06 | 广州水泵厂 | Centrifugal self-priming pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111228 |