CN103790858A - Method for improving centrifugal pump impeller abrasive resistance - Google Patents
Method for improving centrifugal pump impeller abrasive resistance Download PDFInfo
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- CN103790858A CN103790858A CN201410082240.0A CN201410082240A CN103790858A CN 103790858 A CN103790858 A CN 103790858A CN 201410082240 A CN201410082240 A CN 201410082240A CN 103790858 A CN103790858 A CN 103790858A
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Abstract
Provided is a method for improving centrifugal pump impeller abrasive resistance. An impeller comprises a vane, a cover plate and a hub. The vane comprises a vane sucking force face, a vane pressure face, a vane inlet, a vane outlet, a vane inlet end and a vane outlet end. The length of the outer edge of the vane is shortened to 96%-98% of the length of the outer edge of an existing vane with the vane outlet end as a standard. The shape from the middle portion of the vane inlet end to the inner edge section of the vane inlet is not changed. Smooth transition is formed from the middle portion of the vane inlet end to the outer edge section of the vane inlet. The method has the advantages that centrifugal pump impeller abrasive resistance is improved by optimizing design, special materials are of no need for the vane, cost is lowered, centrifugal pump impeller abrasion can be effectively lowered, accordingly, the overall service life of the centrifugal pump impeller is prolonged, and promotion is convenient.
Description
Technical field
The present invention relates to centrifugal pump technical field, specifically a kind of method that improves centrifugal pump impeller wear resistance.
Background technique
Centrifugal pump is widely used a kind of pump type, except carrying liquid, is also used widely in industries such as mining industry, metallurgy, the energy, building, environmental protection and food, and the medium of conveying solid-liquid two-phase flow often.Because it has high-liftly, centrifugal pump is also widely used in the pump station in periphery irrigated area, China the Yellow River.Centrifugal pump its flow passage components in the time carrying solid-liquid two-phase flow are subject to the impact of solid phase particles and wear and tear, and in the pumping plant work along yellow irrigated area, sediment charge is larger, means that more silt participates in the wearing and tearing to flow passage components, weares and teares more serious.Once the blade of centrifugal pump impeller weares and teares, can exert an influence to centrifugal pump performance and efficiency, the overcurrent flow of water pump is reduced; operation becomes unstable, causes vibration and noise, even causes impeller to damage; water pump is shut down, and causes great economic loss and social influence.
In order to improve the wear-resisting property of blade, some centrifugal blades have done a little improvement on material, as researched and developed special material blade etc.But in these methods the material that adopts special, some materials are also more expensive, cause cost of production higher, can not be widely used in production, are unfavorable for spread.
Summary of the invention
The object of the present invention is to provide a kind of method that improves centrifugal pump impeller wear resistance, can, using common used material and ensureing on the basis of centrifugal pump working efficiency, reduce the wearing and tearing of centrifugal blade, extend the working life of centrifugal pump impeller.
Improve a method for centrifugal pump impeller wear resistance, its impeller comprises blade 1, cover plate 2 and wheel hub 3, and described blade 1 comprises blade suction surface 4, blade pressure surface 5, blade import 6, blade exit 7, blade entrance point 8, blade exit end 9; The outer rim length of described blade 1 is take the 96-98% of blade exit end 9 existing blade outer rim length as benchmark foreshortens to, and its blade entrance point 8 middle parts are to blade import 6 inner edge section shape invariances, and blade entrance point 8 middle parts to blade import 6 outer rim sections are smooth transition.
Described blade entrance point 8 middle parts to blade import 6 inner edge sections are offset 5-10 ° to blade suction surface 4, and its blade entrance point 8 middle parts are constant to the laying angle of blade import 6 outer rim sections, and blade entrance point 8 middle parts to blade import 6 inner edge sections are smooth transition.
Described blade exit end 9 thickness are increased to 2-3 times of existing blade exit end thickness along blade pressure surface 5 to blade suction surface 4 directions, blade entrance point 8 thickness are constant, and blade suction surface 4 is smooth transition from blade entrance point 8 to blade exit end 9.
The advantage that the present invention improves the method for centrifugal pump impeller wear resistance is:
1, the present invention improves the wear resistance of centrifugal pump impeller by design optimization, and method is simple;
2, blade does not need special material, reduces costs;
3, the present invention can effectively reduce blade wear, improves working life.
Therefore the present invention can reduce centrifugal blade wearing and tearing effectively, thereby improves the bulk life time of impeller, and is convenient to promote.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing centrifugal pump impeller.
Fig. 2 is the structural representation of existing centrifugal blade pressure side.
Fig. 3 is the structural representation of existing centrifugal blade suction surface.
Fig. 4 is the structural representation of the blade import outer rim after the inventive method is improved.
Fig. 5 is the structural representation of the blade import inner edge after the inventive method is improved.
Fig. 6 is the structural representation of the blade exit end after the inventive method is improved.
Fig. 7 is the structural representation of the wear-resisting centrifugal pump impeller after the inventive method is improved.
Fig. 8 is existing impeller blade pressure side wearing and tearing numerical result figure.
Fig. 9 is existing impeller blade suction surface wearing and tearing numerical result figure.
Figure 10 is embodiment one blade pressure surface wearing and tearing numerical result figure.
Figure 11 is embodiment one blade suction surface wearing and tearing numerical result figure.
In figure, 1 is blade, and 2 is cover plate, 3 is wheel hub, 4 is blade suction surface, and 5 is blade pressure surface, and 6 is blade import, 6 ' for shortening the blade import after blade outer rim length; 6 " for shortening the blade import after outer rim length and inner edge are offset to suction surface, 7 is blade exit, and 8 is blade entrance point, 9 is blade exit end, and 9 ' for increasing the blade exit end after thickness.
Embodiment
Embodiment one
Below in conjunction with accompanying drawing, the present invention is further described: as shown in Fig. 4-7, Figure 10-11, a kind of method that improves centrifugal pump impeller wear resistance, its impeller diameter is 765mm, impeller comprises blade 1, cover plate 2 and wheel hub 3, and described blade 1 comprises blade suction surface 4, blade pressure surface 5, blade import 6, blade exit 7, blade entrance point 8, blade exit end 9; The outer rim length of described blade 1 prototype is 508mm, shorten to 490mm take blade exit end 9 as benchmark, foreshorten to 96.5% of existing blade import outer rim length, its blade entrance point 8 middle parts are to blade import 6 inner edge section shape invariances, and blade entrance point 8 middle parts to blade import 6 outer rim sections are smooth transition.
Described blade entrance point 8 middle parts to blade import 6 inner edge sections are offset 10 ° to blade suction surface 4, and its blade entrance point 8 middle parts are constant to the laying angle of blade import 6 outer rim sections, and blade entrance point 8 middle parts to blade import 6 inner edge sections are smooth transition.
Described blade exit end 9 original thicknesses are 10mm, increase to 20mm along blade pressure surface 5 to blade suction surface 4 directions, be increased to 2 times of existing blade exit end thickness, blade entrance point 8 thickness are constant, and blade suction surface 4 is smooth transition from blade entrance point 8 to blade exit end 9.
Embodiment two
A kind of method that improves centrifugal pump impeller wear resistance, its impeller diameter is 765mm, impeller comprises blade 1, cover plate 2 and wheel hub 3, and described blade 1 comprises blade suction surface 4, blade pressure surface 5, blade import 6, blade exit 7, blade entrance point 8, blade exit end 9; The outer rim length of described blade 1 prototype is 508mm, shorten to 498mm take blade exit end 9 as benchmark, foreshorten to 98% of existing blade import outer rim length, its blade entrance point 8 middle parts are to blade import 6 inner edge section shape invariances, and blade entrance point 8 middle parts to blade import 6 outer rim sections are smooth transition.
Described blade entrance point 8 middle parts to blade import 6 inner edge sections are offset 5 ° to blade suction surface 4, and its blade entrance point 8 middle parts are constant to the laying angle of blade import 6 outer rim sections, and blade entrance point 8 middle parts to blade import 6 inner edge sections are smooth transition.
Described blade exit end 9 original thicknesses are 10mm, increase to 30mm along blade pressure surface 5 to blade suction surface 4 directions, be increased to 3 times of existing blade exit end thickness, blade entrance point 8 thickness are constant, and blade suction surface 4 is smooth transition from blade entrance point 8 to blade exit end 9.
Embodiment three
A kind of method that improves centrifugal pump impeller wear resistance, its impeller diameter is 765mm, impeller comprises blade 1, cover plate 2 and wheel hub 3, and described blade 1 comprises blade suction surface 4, blade pressure surface 5, blade import 6, blade exit 7, blade entrance point 8, blade exit end 9; The outer rim length of described blade 1 prototype is 508mm, shorten to 493mm take blade exit end 9 as benchmark, foreshorten to 97% of existing blade import outer rim length, its blade entrance point 8 middle parts are to blade import 6 inner edge section shape invariances, and blade entrance point 8 middle parts to blade import 6 outer rim sections are smooth transition.
Described blade entrance point 8 middle parts to blade import 6 inner edge sections are offset 7 ° to blade suction surface 4, and its blade entrance point 8 middle parts are constant to the laying angle of blade import 6 outer rim sections, and blade entrance point 8 middle parts to blade import 6 inner edge sections are smooth transition.
Described blade exit end 9 thickness are 10mm, increase to 25mm along blade pressure surface 5 to blade suction surface 4 directions, be increased to 2.5 times of existing blade exit end thickness, blade entrance point 8 thickness are constant, and blade suction surface 4 is smooth transition from blade entrance point 8 to blade exit end 9.
Claims (3)
1. improve a method for centrifugal pump impeller wear resistance, its impeller comprises blade, cover plate and wheel hub, and described blade comprises blade suction surface, blade pressure surface, blade import, blade exit, blade entrance point, blade exit end; It is characterized in that: the outer rim length of described blade is take the 96-98% of blade exit end existing blade outer rim length as benchmark foreshortens to, its blade entrance point middle part is to blade import inner edge section shape invariance, and blade entrance point middle part to blade import outer rim section is smooth transition.
2. the method for raising centrifugal pump impeller wear resistance as claimed in claim 1, it is characterized in that: described blade entrance point middle part is skew 5-10 ° to blade import inner edge section to blade suction surface, its blade entrance point middle part is constant to the laying angle of blade import outer rim section, and blade entrance point middle part to blade import inner edge section is smooth transition.
3. the method for raising centrifugal pump impeller wear resistance as claimed in claim 1, it is characterized in that: described blade exit end thickness is increased to 2-3 times of existing blade exit end thickness along blade pressure surface to blade suction surface direction, blade entrance point thickness is constant, and blade suction surface is smooth transition from blade entrance point to blade exit end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410082240.0A CN103790858A (en) | 2014-03-07 | 2014-03-07 | Method for improving centrifugal pump impeller abrasive resistance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410082240.0A CN103790858A (en) | 2014-03-07 | 2014-03-07 | Method for improving centrifugal pump impeller abrasive resistance |
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| Publication Number | Publication Date |
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| CN103790858A true CN103790858A (en) | 2014-05-14 |
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| CN201410082240.0A Pending CN103790858A (en) | 2014-03-07 | 2014-03-07 | Method for improving centrifugal pump impeller abrasive resistance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041719B (en) * | 2015-06-26 | 2018-04-20 | 武汉大学 | A kind of double suction centrifugal pump guide-vane choma |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4428717A (en) * | 1979-10-29 | 1984-01-31 | Rockwell International Corporation | Composite centrifugal impeller for slurry pumps |
| CN201351632Y (en) * | 2009-02-16 | 2009-11-25 | 朱海川 | Impeller for double suction centrifugal pump |
| CN201739223U (en) * | 2010-06-29 | 2011-02-09 | 武汉大学 | Double-suction centrifugal pump rotating wheel |
-
2014
- 2014-03-07 CN CN201410082240.0A patent/CN103790858A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4428717A (en) * | 1979-10-29 | 1984-01-31 | Rockwell International Corporation | Composite centrifugal impeller for slurry pumps |
| CN201351632Y (en) * | 2009-02-16 | 2009-11-25 | 朱海川 | Impeller for double suction centrifugal pump |
| CN201739223U (en) * | 2010-06-29 | 2011-02-09 | 武汉大学 | Double-suction centrifugal pump rotating wheel |
Non-Patent Citations (2)
| Title |
|---|
| 王志远等: "叶轮形式对双吸式离心泵叶片泥沙磨损的影响分析", 《节水灌溉》, 30 November 2013 (2013-11-30), pages 9 - 11 * |
| 钱忠东等: "双吸式离心泵叶片头部形状对泥沙磨损的影响", 《排灌机械工程学报》, vol. 32, no. 2, 28 February 2014 (2014-02-28), pages 103 - 107 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041719B (en) * | 2015-06-26 | 2018-04-20 | 武汉大学 | A kind of double suction centrifugal pump guide-vane choma |
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Application publication date: 20140514 |