CN202001369U - Axial-flow pump - Google Patents
Axial-flow pump Download PDFInfo
- Publication number
- CN202001369U CN202001369U CN2010206777001U CN201020677700U CN202001369U CN 202001369 U CN202001369 U CN 202001369U CN 2010206777001 U CN2010206777001 U CN 2010206777001U CN 201020677700 U CN201020677700 U CN 201020677700U CN 202001369 U CN202001369 U CN 202001369U
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- blade
- axial
- flow pump
- apex
- size
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Abstract
The utility model relates to an axial-flow pump which comprises a enclosure, wherein the enclosure is internally provided with an impeller; the size of the gap of a blade apex of the impeller is 0.7-1.6 mm; the size of the gap of the blade apex of a blade near a blade dish is 2-3 times of that of the gap of the blade apex near the rear of the blade; the blade is in a wing shape, and the blade apex part is cut into a pinnacle; and the torsional angle between the apex part of the vane and the middle part of the vane is increased by 5 %. The gap of the blade apex is shorten, and the blade apex adopts a pinnacle structure, so as to effectively reduce the effect from that flow leaks from the blade apex, decrease the loss and improve the work efficiency of the axial-flow pump; in addition, the cut pinnacle structure is rather thin, so as not to cause big damage if the vane wheel collides with the enclosure during the course of the operation; the axial-flow pump has a simple structure, is convenient to implement and improves the property.
Description
Technical field
The utility model relates to field of fluid machinery, especially relates to a kind of axial-flow pump that can increase work efficiency.
Background technique
Pump is widely used in the every field of national economy, and centrifugal pump and axial-flow pump are two kinds of main structural types of pump.The impeller that the blade of centrifugal pump is common and front and rear cover plate formation runner seals all around.The impeller of axial-flow pump only is made up of blade and wheel hub, between blade and frame radial clearance is arranged.In the process of wheel rotation, fluid is revealed from radial clearance, and forms whirlpool, causes bigger hydraulic loss, influences the working efficiency of axial-flow pump.
Summary of the invention
Technical problem to be solved in the utility model provides and a kind ofly can reduce tip leakage stream, the axial-flow pump of increasing work efficiency.
The technical scheme in the invention for solving the technical problem is: a kind of axial-flow pump, comprise casing, casing inside is provided with impeller, the tip clearance size of the blade of described impeller has dwindled 20～30% than stock size, wherein stock size is between 1～2mm, and promptly size is between 0.7～1.6mm.
Owing to rotate shell is caused damage, described blade is of a size of near the tip clearance size of blade back 2～3 times near the tip clearance at leaf basin place in order to reduce blade, and described blade is airfoil, and blade tip is whittled into the pinnacle.
In order to effectively reduce the influence of tip leakage stream, described blade tip improves 5% to blade middle part distortion angle.
Effect intentionally of the present utility model is: dwindle tip clearance and adopt leaf top sharpening roof construction can effectively reduce the influence of tip leakage stream, reduce the loss, improve the working efficiency of axial-flow pump.In addition, because the sharpening roof construction is thinner, if run into casing in the impeller running, also can not cause bigger damage, simple in structure, the convenient realization improved performance.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is an airfoil blade of the present utility model.
Among the figure: 1, blade 2, blade back 3, casing 4, leaf basin
Embodiment
A kind of as depicted in figs. 1 and 2 axial-flow pump comprises casing 3, and casing 3 inside are provided with impeller, and the ratio stock size of the tip clearance size of the blade 1 of described impeller (being the distance between blade tip and the casing 3) has dwindled 20～30%; The tip clearance at described blade 1 close leaf basin 4 places is of a size of 2～3 times near the tip clearance size of blade back 2; Described blade 1 is airfoil, and blade 1 tip is whittled into the pinnacle; Described blade 1 tip improves 5% to blade 1 middle part distortion angle; Circular rector designs such as described blade 1 distortion employing, wherein blade 1 tip amount of finish improves 2% than design load.
By dwindling the influence that the tip clearance size has effectively reduced tip leakage stream, axial-flow pump is improved working power good effect, because the sharpening roof construction is thinner, if run into casing in the impeller running, also can not cause bigger damage.
Claims (4)
1. an axial-flow pump comprises casing, and casing inside is provided with impeller, it is characterized in that: the tip clearance of the blade of described impeller is of a size of between 0.7～1.6mm.
2. axial-flow pump according to claim 1 is characterized in that: the tip clearance at the close leaf basin place of described blade is of a size of 2～3 times near the tip clearance size of blade back.
3. axial-flow pump according to claim 1 is characterized in that: described blade is airfoil, and blade tip is whittled into the pinnacle.
4. axial-flow pump according to claim 1 is characterized in that: described blade tip improves 5% to blade middle part distortion angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206777001U CN202001369U (en) | 2010-12-24 | 2010-12-24 | Axial-flow pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206777001U CN202001369U (en) | 2010-12-24 | 2010-12-24 | Axial-flow pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202001369U true CN202001369U (en) | 2011-10-05 |
Family
ID=44704112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206777001U Expired - Fee Related CN202001369U (en) | 2010-12-24 | 2010-12-24 | Axial-flow pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202001369U (en) |
-
2010
- 2010-12-24 CN CN2010206777001U patent/CN202001369U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20111224 |