CN103133404A - Structural design of pump with front preswirl plate of inducer having long and short vanes - Google Patents
Structural design of pump with front preswirl plate of inducer having long and short vanes Download PDFInfo
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- CN103133404A CN103133404A CN2013100724121A CN201310072412A CN103133404A CN 103133404 A CN103133404 A CN 103133404A CN 2013100724121 A CN2013100724121 A CN 2013100724121A CN 201310072412 A CN201310072412 A CN 201310072412A CN 103133404 A CN103133404 A CN 103133404A
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- inducer
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- vanes
- pump
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Abstract
The invention relates to structural design of a pump with a front preswirl plate of an inducer having long and short vanes. The inducer is provided with two long vanes and two short vanes. According to the design, the long and short vanes are spaced, the short vanes are located at the tail of the inducer, and the short vanes are disposed between the long vanes. Therefore, occurrence and development of flow separation are prevented effectively. The inducer is fine in cavitation resistance, so that inlet flow field of an impeller can be improved. In addition, formed lift enables net positive suction head to be lowered, and prevention on impeller cavitation is promoted. The tail of the preswirl plate extends to the inducer at an acute-angle, the tail is kept equal to an inlet edge of the inducer with long and short vanes in edge distance, the inlet flow field can be improved effectively, and pre-whirling is prevented.
Description
Technical field
The present invention relates to the pump structure design of the preposition pre-rotating plate of deviated splitter vane inducer, be used for improving the anti-cavitation ability of pump, improve the impeller inlet flow field.
Background technique
At present, inducer has been widely used in improving the cavitation resistive property of pump.Inducer belongs to aial flow impeller, geometrical property and cavitation characteristic with aial flow impeller, inducer load itself is little, power is less, as long as and main impeller ties in, just can change the mobility status of impeller inlet, but the interior flow field of conventional inducer is unsatisfactory, and the adjacent blades outlet gap is bigger than normal large, easily causes near the separation of flow and the boundary layer separation of producing of inducer blade exit.The design of pump is that hypothesis current are vertical imports that enter water pump.But due to the effect of blade rotary, or the reason such as the design of intake pipe is unreasonable, cause current that certain rotation is arranged when entering unit fixed on water pump suction.Prewhirling of pump inlet may cause water pump not in efficient district's work, may cause the cavitation damage of water pump when more serious.
Summary of the invention
In order to prevent that the impeller inlet place from cavitation occuring, affect the stable operation of pump, the structural design that the invention provides the preposition pre-rotating plate of a kind of deviated splitter vane inducer is improved the impeller inlet flow field.The present invention can avoid producing the separation of flow and boundary layer separation near the inducer blade exit, improves efficient and the cavitation resistive property of inducer, can prevent from prewhirling simultaneously.
Realize that the technological scheme that above-mentioned purpose adopts is:
Inducer involved in the present invention has two linear leafs and two short blades, design is the deviated splitter vane interval, and short blade is placed on the afterbody of inducer, short blade is set between linear leaf, effectively prevent generation and the development of the separation of flow, it is good that the anti-cavitation performance of inducer itself compares, and can improve the inlet flow field of impeller, the lift of its generation simultaneously can reduce NPSH, to preventing impeller generation cavitation, certain promoting effect is arranged.
Its afterbody of pre-rotating plate involved in the present invention is the acute angle shape that extends to inducer, and the gaps such as its tail shape and the maintenance of deviated splitter vane inducer inlet side, can effectively improve inlet flow field, prevents from prewhirling.
The invention has the beneficial effects as follows: improve the inlet flow field of impeller, improve the cavitation performance of pump, make the impeller inlet place that cavitation not occur, extended its working life, improved simultaneously the efficient of pump.
Description of drawings
Fig. 1 is the pump structure schematic diagram of one embodiment of the invention
Fig. 2 is the structural representation of inducer
Fig. 3 is the structural representation of pre-rotating plate
In figure: 1. the pump housing, 2. main impeller, 3. inducer, 4. pump cover, 5. main shaft, 6. motor, 7. linear leaf, 8. short blade, 9. pre-rotating plate, the board component of 10. prewhirling, 11 acute angle shapes.
Embodiment
Fig. 1, Fig. 2 and Fig. 3 have determined pump structure form in the present embodiment jointly.By scyewed joint, fluid enters main impeller (2) through pre-rotating plate (9), inducer (3) to inducer (3), then enters the pump housing (1) and discharge tube with main shaft (5).The present invention settles pre-rotating plate before the deviated splitter vane inducer, fluid is when the pre-rotating plate, and inlet whirl contained, when flowing through the deviated splitter vane inducer, it is large that inlet pressure becomes, and main impeller (2) import is difficult for cavitating.The design of the pump structure of the preposition pre-rotating plate of deviated splitter vane inducer that the present invention relates to has improved the inlet flow field of impeller, has improved the cavitation performance of pump, makes the impeller inlet place that cavitation not occur, and has extended its working life, has improved simultaneously the efficient of pump.
Claims (3)
1. the pump structure of the preposition pre-rotating plate of deviated splitter vane inducer design, inducer has two linear leafs and two short blades, and design is the deviated splitter vane interval, and short blade is placed on the afterbody of inducer.
2. pre-its afterbody of rotating plate is the acute angle shape that extends to inducer, and the gaps such as its tail shape and the maintenance of deviated splitter vane inducer inlet side.
3. in structural design claimed in claim 1, before pre-rotating plate is placed in inducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100724121A CN103133404A (en) | 2013-03-07 | 2013-03-07 | Structural design of pump with front preswirl plate of inducer having long and short vanes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100724121A CN103133404A (en) | 2013-03-07 | 2013-03-07 | Structural design of pump with front preswirl plate of inducer having long and short vanes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103133404A true CN103133404A (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100724121A Pending CN103133404A (en) | 2013-03-07 | 2013-03-07 | Structural design of pump with front preswirl plate of inducer having long and short vanes |
Country Status (1)
| Country | Link |
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| CN (1) | CN103133404A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545379A (en) * | 2015-12-09 | 2016-05-04 | 西安航天动力研究所 | Connection structure among inducing wheel, centrifugal wheel and rotor |
| CN108150449A (en) * | 2018-01-09 | 2018-06-12 | 兰州理工大学 | A kind of novel inducer |
| CN109915418A (en) * | 2019-03-18 | 2019-06-21 | 江苏大学 | A kind of blade extension type vertical centrifugal pump airflow fence and the centrifugal pump using the airflow fence |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1429032A2 (en) * | 2002-12-11 | 2004-06-16 | Hitachi Industries Co., Ltd. | A centrifugal compressor having inlet guide vanes |
| CN201771871U (en) * | 2010-07-08 | 2011-03-23 | 上海连成（集团）有限公司 | New supporting structure applied to inducer of condensate pump |
| CN202100536U (en) * | 2011-05-19 | 2012-01-04 | 陈招锋 | Prerotation rectifying device |
| CN202628618U (en) * | 2012-03-08 | 2012-12-26 | 江苏大学 | AP1000 nuclear main pump with inducer with long and short blades |
| CN203239637U (en) * | 2013-03-07 | 2013-10-16 | 江苏大学 | Structural design of pump with prewhirl plate arranged in front of inducer with long blades and short blades |
-
2013
- 2013-03-07 CN CN2013100724121A patent/CN103133404A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1429032A2 (en) * | 2002-12-11 | 2004-06-16 | Hitachi Industries Co., Ltd. | A centrifugal compressor having inlet guide vanes |
| CN201771871U (en) * | 2010-07-08 | 2011-03-23 | 上海连成（集团）有限公司 | New supporting structure applied to inducer of condensate pump |
| CN202100536U (en) * | 2011-05-19 | 2012-01-04 | 陈招锋 | Prerotation rectifying device |
| CN202628618U (en) * | 2012-03-08 | 2012-12-26 | 江苏大学 | AP1000 nuclear main pump with inducer with long and short blades |
| CN203239637U (en) * | 2013-03-07 | 2013-10-16 | 江苏大学 | Structural design of pump with prewhirl plate arranged in front of inducer with long blades and short blades |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545379A (en) * | 2015-12-09 | 2016-05-04 | 西安航天动力研究所 | Connection structure among inducing wheel, centrifugal wheel and rotor |
| CN108150449A (en) * | 2018-01-09 | 2018-06-12 | 兰州理工大学 | A kind of novel inducer |
| CN109915418A (en) * | 2019-03-18 | 2019-06-21 | 江苏大学 | A kind of blade extension type vertical centrifugal pump airflow fence and the centrifugal pump using the airflow fence |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130605 |