CN204099272U - A kind of low specific-speed centrifugal pump impeller - Google Patents
A kind of low specific-speed centrifugal pump impeller Download PDFInfo
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- CN204099272U CN204099272U CN201420548644.XU CN201420548644U CN204099272U CN 204099272 U CN204099272 U CN 204099272U CN 201420548644 U CN201420548644 U CN 201420548644U CN 204099272 U CN204099272 U CN 204099272U
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- 239000012530 fluid Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The utility model discloses a kind of low specific-speed centrifugal pump impeller.Comprise front shroud, impeller blade and back shroud, front shroud, the impeller blade be made up of primary blades and splitterr vanes and back shroud are fixed together around wheel hub and rotate; At the afterbody of all primary blades and splitterr vanes, account for length of blade 15% ~ 25% place, deflect 5 ° ~ 15 ° to blade pressure surface direction.The utility model, by changing the position of blade afterbody on axial plane, reduces the exit angle of impeller blade, fluid fully can be contacted with blade in wheel rotation process, reduces the separation of flow, thus the effective efficiency improving centrifugal pump.Divided by leaf head simultaneously and interrupt, mobile one section of level and vertical distance, make flowing more even, the utility model has in fields such as oil, chemical industry, Aero-Space, metallurgy and light industry and acts on widely.
Description
Technical field
The utility model relates to centrifugal pump, especially relates to a kind of low specific-speed centrifugal pump impeller.
Background technique
At present, low specific-speed centrifugal pump adopts larger impeller blade exit angle to obtain larger head coefficient in the middle of design process, this structural type will make fluid fully can not contact with blade through blade exit place, thus cause flowing to deflect the even separation of flow.Meanwhile, vane inlet runner is longer and narrower, and flowing is easily piled up, and this all by reducing the efficiency of whole centrifugal pump, producing unnecessary energy consumption, thus affecting the transportation performance of centrifugal pump.From the Hydraulic Design, optimizing the raising choosing to reach performance of centrifugal pump of each design parameter, is one of design method of current main flow.
Model utility content
In order to improve existing low specific-speed centrifugal pump efficiency deficiency on the low side.The purpose of this utility model is to provide a kind of low specific-speed centrifugal pump impeller, the deflection of blade afterbody and primary blades head are interrupted and the low specific-speed centrifugal pump of movement, object is to solve in prior art because larger blade outlet angle will make the fluid generation separation of flow to the problem causing efficiency to reduce.
The technical solution adopted in the utility model is:
The utility model comprises front shroud, impeller blade and back shroud, front shroud, and the impeller blade be made up of primary blades and splitterr vanes and back shroud are fixed together around wheel hub and rotate; Accounting for primary blades length at all primary blades afterbodys is 15% ~ 25% place, deflects 5 ° ~ 15 ° to primary blades pressure side direction; Account for splitterr vanes length 15% ~ 25% place at the afterbody of all splitterr vanes, deflect 5 ° ~ 15 ° to splitterr vanes pressure side direction.
It is that 20% ~ 30% place cuts off that described primary blades head accounts for primary blades length, is 20% to 100% length of vane thickness by the head after cut-out to X postive direction amount of movement, is 50% ~ 150% length of vane thickness by the head after cut-out to Y negative direction amount of movement.
Compared with background technique, the beneficial effect that the utility model has is:
1) the blade afterbody obtained turns to pressure side lateral deviation by the utility model, effective anti-fluid the separation of flow can occur when flowing through blade exit place like this.
2) the utility model blade afterbody turns the efficiency that can improve pump on the basis ensureing certain head coefficient to pressure side lateral deviation, improves conveying effect.
3) the utility model in front of the blade edge to interrupt and part flow along gap by fluid after moving one section of level and perpendicular distance, the flowing effectively alleviating vane inlet place blocks, and improves the hydraulic performance of centrifugal pump to a certain extent.
4) the utility model has in fields such as oil, chemical industry, Aero-Space, metallurgy and light industry and acts on widely.
Accompanying drawing explanation
Fig. 1 is impeller sectional view of the present utility model.
Fig. 2 is the side view that Fig. 1 removes front shroud.
Fig. 3 is impeller primary blades schematic diagram of the present utility model.
Fig. 4 is that the utility model carries out contrast effect figure with the front model numerical result of improvement.
In figure: 1, front shroud, 2, impeller blade, 3, back shroud, 4, primary blades, 5, splitterr vanes, 6, blade inlet edge, 7, Y-direction amount of movement, 8, X-direction amount of movement, a, primary blades pressure side, b, primary blades suction surface.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1 and Figure 2, the utility model comprises front shroud 1, impeller blade 2 and back shroud 3, front shroud 1, and the impeller blade 2 be made up of primary blades 4 and splitterr vanes 5 and back shroud 3 are fixed together around wheel hub and rotate; Accounting for primary blades 4 length at all primary blades 4 afterbodys is 15% ~ 25% place, deflects 5 ° ~ 15 ° to primary blades pressure side a direction; Account for splitterr vanes 5 length 15% ~ 25% place at the afterbody of all splitterr vanes 5, deflect 5 ° ~ 15 ° to splitterr vanes pressure side direction.
As shown in Figure 2 and Figure 3, it is that 20% ~ 30% place cuts off that described primary blades 4 head accounts for primary blades 4 length, being 20% to 100% length of vane thickness to X postive direction amount of movement by the head after cut-out, is 50% ~ 150% length of vane thickness to Y negative direction amount of movement by the head after cut-out.
As shown in Figure 4, it is whole machine model numerical calculation under design discharge point is carried out to the impeller after the deflection of blade pressure surface direction to the afterbody of all primary blades and splitterr vanes, and contrast with the front model numerical result of improvement, Fig. 4 (a) is the static pressure distribution figure of the Impeller Design flow point before improvement, Fig. 4 (b) is the static pressure distribution figure of the Impeller Design flow point after improvement, Fig. 4 (a) and Fig. 4 (b) static pressure increase from leaf head gradually to blade afterbody, maximum value is reached at blade afterbody, the size of contrast impeller blade afterbody pressure span can judge that the performance of two impellers is good and bad.As can be seen from the figure, the utility model impeller afterbody has more large-area static pressure district, and this illustrates that the transportation performance of the utility model impeller is improved.Finally, under design discharge point, the utility model model complete machine numerical simulation efficiency is 62.5%, and archetype numerical calculation efficiency is 60.2%.Improve 2.3%.
Claims (2)
1. a low specific-speed centrifugal pump impeller, comprise front shroud (1), impeller blade (2) and back shroud (3), front shroud (1), the impeller blade (2) be made up of primary blades (4) and splitterr vanes (5) and back shroud (3) are fixed together around wheel hub and rotate; It is characterized in that: accounting for primary blades (4) length at all primary blades (4) afterbody is 15% ~ 25% place, deflects 5 ° ~ 15 ° to primary blades pressure side (a) direction; Account for splitterr vanes (5) length 15% ~ 25% place at the afterbody of all splitterr vanes (5), deflect 5 ° ~ 15 ° to splitterr vanes pressure side direction.
2. a kind of low specific-speed centrifugal pump impeller according to claim 1, it is characterized in that: it is that 20% ~ 30% place cuts off that described primary blades (4) head accounts for primary blades (4) length, being 20% to 100% length of vane thickness to X postive direction amount of movement by the head after cut-out, is 50% ~ 150% length of vane thickness to Y negative direction amount of movement by the head after cut-out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420548644.XU CN204099272U (en) | 2014-09-24 | 2014-09-24 | A kind of low specific-speed centrifugal pump impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420548644.XU CN204099272U (en) | 2014-09-24 | 2014-09-24 | A kind of low specific-speed centrifugal pump impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204099272U true CN204099272U (en) | 2015-01-14 |
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| CN201420548644.XU Active CN204099272U (en) | 2014-09-24 | 2014-09-24 | A kind of low specific-speed centrifugal pump impeller |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626575A (en) * | 2015-12-29 | 2016-06-01 | 西安航天动力研究所 | Multi-level blade centrifugal wheel |
| CN105889123A (en) * | 2014-12-30 | 2016-08-24 | 兰州理工大学 | Novel-structure impeller of low-specific-speed centrifugal pump |
| CN110259720A (en) * | 2019-06-11 | 2019-09-20 | 江苏大学镇江流体工程装备技术研究院 | A kind of gap for centrifugal pump drains impeller and with its centrifugal pump |
-
2014
- 2014-09-24 CN CN201420548644.XU patent/CN204099272U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889123A (en) * | 2014-12-30 | 2016-08-24 | 兰州理工大学 | Novel-structure impeller of low-specific-speed centrifugal pump |
| CN105626575A (en) * | 2015-12-29 | 2016-06-01 | 西安航天动力研究所 | Multi-level blade centrifugal wheel |
| CN105626575B (en) * | 2015-12-29 | 2019-05-24 | 西安航天动力研究所 | Multistage blade centrifugal wheel |
| CN110259720A (en) * | 2019-06-11 | 2019-09-20 | 江苏大学镇江流体工程装备技术研究院 | A kind of gap for centrifugal pump drains impeller and with its centrifugal pump |
| CN110259720B (en) * | 2019-06-11 | 2021-11-30 | 江苏大学镇江流体工程装备技术研究院 | Gap drainage impeller for centrifugal pump and centrifugal pump with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |