CN203239637U - Structural design of pump with prewhirl plate arranged in front of inducer with long blades and short blades - Google Patents
Structural design of pump with prewhirl plate arranged in front of inducer with long blades and short blades Download PDFInfo
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- CN203239637U CN203239637U CN 201320109101 CN201320109101U CN203239637U CN 203239637 U CN203239637 U CN 203239637U CN 201320109101 CN201320109101 CN 201320109101 CN 201320109101 U CN201320109101 U CN 201320109101U CN 203239637 U CN203239637 U CN 203239637U
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- inducer
- blades
- prewhirl
- pump
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Abstract
The utility model relates to a structural design of a pump with a prewhirl plate arranged in front of an inducer with long blades and short blades. The inducer is provided with the two long blades and the two short blades, according to the design method, the long blades and the short blades are arranged at intervals, the short blades are arranged at the tail portion of the inducer and arranged between the long blades, occurrence and development of flow separation are effectively prevented, anti-cavitation performance of the inducer is good, the inlet flow field of an impeller can be improved, meanwhile, the cavitation margin can be reduced through produced lift, and a certain promoting role in preventing cavitation from occurring to the impeller is played. The tail portion of the prewhirl plate is of an acute angle shape extending to the inducer, equal distances exist between edges of the tail portion of the prewhirl plate and the inlet edge of the inducer with the long blades and the short blades, the inlet flow field can be effectively improved, and prewhirl can be avoided.
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 because 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 simultaneously its generation 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, prolonged 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
Among the 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.Inducer (3) passes through scyewed joint with main shaft (5), and fluid enters main impeller (2) through pre-rotating plate (9), inducer (3), then enters the pump housing (1) and discharge tube.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 pump structure of the preposition pre-rotating plate of deviated splitter vane inducer that the present invention relates to designs, and 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 prolonged 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. the pump structure of the preposition pre-rotating plate of deviated splitter vane inducer according to claim 1 design is characterized in that: the acute angle shape of pre-its afterbody of rotating plate for extending to inducer, and the gaps such as its tail shape and the maintenance of deviated splitter vane inducer inlet side.
3. the pump structure of the preposition pre-rotating plate of deviated splitter vane inducer according to claim 1 design is characterized in that: pre-rotating plate is placed in before the inducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320109101 CN203239637U (en) | 2013-03-07 | 2013-03-07 | Structural design of pump with prewhirl plate arranged in front of inducer with long blades and short blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320109101 CN203239637U (en) | 2013-03-07 | 2013-03-07 | Structural design of pump with prewhirl plate arranged in front of inducer with long blades and short blades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203239637U true CN203239637U (en) | 2013-10-16 |
Family
ID=49316944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320109101 Expired - Fee Related CN203239637U (en) | 2013-03-07 | 2013-03-07 | Structural design of pump with prewhirl plate arranged in front of inducer with long blades and short blades |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203239637U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103133404A (en) * | 2013-03-07 | 2013-06-05 | 江苏大学 | Structural design of pump with front preswirl plate of inducer having long and short vanes |
| 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 |
-
2013
- 2013-03-07 CN CN 201320109101 patent/CN203239637U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103133404A (en) * | 2013-03-07 | 2013-06-05 | 江苏大学 | Structural design of pump with front preswirl plate of inducer having long and short vanes |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20140307 |