CN2265446Y - High-speed composite impeller centrifugal pump - Google Patents
High-speed composite impeller centrifugal pump Download PDFInfo
- Publication number
- CN2265446Y CN2265446Y CN 96203683 CN96203683U CN2265446Y CN 2265446 Y CN2265446 Y CN 2265446Y CN 96203683 CN96203683 CN 96203683 CN 96203683 U CN96203683 U CN 96203683U CN 2265446 Y CN2265446 Y CN 2265446Y
- Authority
- CN
- China
- Prior art keywords
- impeller
- centrifugal pump
- speed
- composite
- composite impeller
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a high-speed centrifugal pump with a composite impeller, which comprises a machine casing, wherein, a crankshaft which is supported by a bearing is arranged in the machine casing; a sealing device is arranged between the machine casing and the crankshaft whose end is provided with the composite impeller which is formed by that a short blade is additionally arranged between the two long blades of an impeller; usually, one to six short blades are additionally arranged between the two long blades; the outlet placing angle of the long and the short blade of the composite impeller is 35-50DEG. C. The utility model can be used for stabilizing the flow of liquid in an impeller channel, increasing cavitation performance and head coefficient.
Description
The utility model relates to centrifugal pump, relates in particular to the high speed compound impeller centrifugal pump.
Pump has obtained using widely in the national economy every field as a kind of universal machine.The important parameter of characteristic of centrifugal pump design and application is specific speed n
s=(3.65nQ
0.5/ H
0.75), it is the overall target of lift H, flow Q and working speed n.Specific speed is lower than 80 centrifugal pump and is called low specific-speed centrifugal pump, and along with expanding economy and development of technology, centrifugal pump more and more develops to high speed, high pressure, efficient and big functional density direction.High speed centrifugal pump is owing to its lift height, in light weight, compact structure, easy to maintenance and advantage good reliability receive colleague's concern both at home and abroad.High speed centrifugal pump is because the rotating speed height just must add inducer to improve the cavitation performance of pump assembly before centrifugal wheel.Yet the high-lift centrifugal low problem that reaches poor work stability (being that its lift Flow characteristics line exists the positive slope ascent stage) of efficient that but exists of low-specific-speed, especially specific speed less than 30 situation under, particularly serious, therefore at present both at home and abroad for low-specific-speed and ultra-low specific speed (n
s=15～40) conveying of small flow medium all is to adopt reciprocating plunger pump or multistage centrifugal pump to realize, but this class pump structure heaviness, troublesome maintenance, easily damaged parts is many and poor reliability, so its user cost is very high.Therefore how to design that low-specific-speed Analysis of High-speed Centrifugal Pump with Inducer unit makes it to have higher efficient, head coefficient, cavitation performance and small flow working stability preferably, be present centrifugal pump design studies person's top priority.
The purpose of this utility model provides a kind of high speed compound impeller centrifugal pump.
Be illustrated below in conjunction with accompanying drawing.
Accompanying drawing is the composite impeller structural representation.
High-speed composite impeller centrifugal pump comprises casing, is provided with the machine that is supported by bearing in casing Axle is provided with sealing device between casing and the arbor, and the arbor end is provided with impeller, impeller eye The place is provided with inducer, and the arbor other end is through linking to each other with motor than fast case. Said impeller is for multiple The hinge wheel namely is provided with short blade 2 between impeller two linear leafs 1, be generally 1～6. Multiple The hinge wheel diameter is 100～220mm. The outlet laying angle of the deviated splitter vane of composite impeller is 35～50 °; Specific speed is little to get the small value, and specific speed is got greatly higher value.
Be 16～24 at specific speed, impeller outer diameter when 150～220mm, impeller two linear leafs it Between acquire one of one-level short blade, two of secondary short blades, three grades of short blades two or three.
At specific speed is 24～35, and impeller outer diameter is acquired one of one-level short blade between impeller two linear leafs when 130～220mm, two or four of secondary short blades.
At specific speed is 36～40, acquires one of one-level short blade between impeller two linear leafs, one or two of secondary short blades (short blade is divided into one, two, three according to length).
At specific speed is 40～80, acquires one of one-level short blade between impeller two linear leafs.
Structural feature of the present utility model is:
1. the inlet louver number is few, has reduced inlet and has squeezed, and has improved cavitation performance;
2. the outlet number of blade is many, therefore can also play the liquid stream of blade non-working surface to add the merit effect, has improved the diffusance of runner, has stoped the eddy current and the separation of flow to produce effectively and development, has stablized liquid stream flowing at impeller channel;
3. adopt bigger blade outlet angle, and long, in, the short blade combination, improved head coefficient;
4. designed the structure matching of rational inducer and composite impeller, this structure makes has quite reasonable flow channel of axial plane between the two-wheeled, reduced the dynamic depression head of composite impeller, has guaranteed that the energy between composite impeller and the inducer is flux matched;
5. rational axial force balance mode utilizes the boss size of composite impeller that the axial force of pump end is regulated, and the axial force that makes it to produce with gear equates but direction is opposite.
The technical parameter of high speed compound wheel centrifugal pump series is:
Specific speed n
s=16～80 rotation speed n=7500～14000rpm
Lift H=200～900m flow Q=1～80m
3/ h
Efficiency eta=35～80%
Net positive suction head NPSH=1.5m, corresponding cavitation specific speed can reach more than 3500, has very stable lift rating curve, does not promptly have the positive slope ascent stage.
Claims (3)
1. high speed compound impeller centrifugal pump, it comprises casing, in casing, be provided with arbor by bearings, be provided with seal arrangement between casing and the arbor, the arbor end is provided with impeller, the impeller eye place is provided with inducer, it is characterized in that said impeller is a composite impeller, promptly has additional short blade [2] between impeller two linear leafs [1].
2. a kind of high speed compound impeller centrifugal pump according to claim 1 and 2, the outlet laying angle that it is characterized in that the deviated splitter vane of said composite impeller is 35～50 °.
3. a kind of high speed compound impeller centrifugal pump according to claim 1 and 2 is characterized in that said composite impeller diameter is 100～220mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96203683 CN2265446Y (en) | 1996-02-07 | 1996-02-07 | High-speed composite impeller centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96203683 CN2265446Y (en) | 1996-02-07 | 1996-02-07 | High-speed composite impeller centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2265446Y true CN2265446Y (en) | 1997-10-22 |
Family
ID=33889206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96203683 Expired - Fee Related CN2265446Y (en) | 1996-02-07 | 1996-02-07 | High-speed composite impeller centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2265446Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005054680A1 (en) * | 2003-12-04 | 2005-06-16 | Beijing Benran S&T Co., Ltd. | Centrifugal pump |
| CN101865157A (en) * | 2010-06-11 | 2010-10-20 | 中国兵器工业集团第七O研究所 | Centrifugal water pump |
| CN102287398A (en) * | 2011-07-25 | 2011-12-21 | 中国航天科技集团公司第六研究院第十一研究所 | Small-sized high-speed centrifugal pump suitable for flow regulation in wide range |
| CN101586579B (en) * | 2009-04-23 | 2012-12-05 | 李新桥 | Sludge pump impeller with splitter vanes |
| CN103775377A (en) * | 2013-12-31 | 2014-05-07 | 江苏大学 | Torque flow pump hydraulic design method by adopting long-short vanes |
| CN103953583A (en) * | 2014-04-04 | 2014-07-30 | 上海第一水泵厂有限公司 | Horizontal self-balanced centrifugal pump with first-stage compound impeller |
| CN104847659A (en) * | 2015-01-05 | 2015-08-19 | 兰州理工大学 | Liquid ring pump blade wheel |
| CN115076156A (en) * | 2022-07-29 | 2022-09-20 | 江苏大学 | Full-flow high-efficiency high-speed centrifugal pump |
-
1996
- 1996-02-07 CN CN 96203683 patent/CN2265446Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005054680A1 (en) * | 2003-12-04 | 2005-06-16 | Beijing Benran S&T Co., Ltd. | Centrifugal pump |
| CN101586579B (en) * | 2009-04-23 | 2012-12-05 | 李新桥 | Sludge pump impeller with splitter vanes |
| CN101865157A (en) * | 2010-06-11 | 2010-10-20 | 中国兵器工业集团第七O研究所 | Centrifugal water pump |
| CN102287398A (en) * | 2011-07-25 | 2011-12-21 | 中国航天科技集团公司第六研究院第十一研究所 | Small-sized high-speed centrifugal pump suitable for flow regulation in wide range |
| CN103775377A (en) * | 2013-12-31 | 2014-05-07 | 江苏大学 | Torque flow pump hydraulic design method by adopting long-short vanes |
| CN103953583A (en) * | 2014-04-04 | 2014-07-30 | 上海第一水泵厂有限公司 | Horizontal self-balanced centrifugal pump with first-stage compound impeller |
| CN104847659A (en) * | 2015-01-05 | 2015-08-19 | 兰州理工大学 | Liquid ring pump blade wheel |
| CN115076156A (en) * | 2022-07-29 | 2022-09-20 | 江苏大学 | Full-flow high-efficiency high-speed centrifugal pump |
| CN115076156B (en) * | 2022-07-29 | 2024-03-05 | 江苏大学 | Full-flow high-efficiency high-speed centrifugal pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |