CN218030770U - Centrifugal pump impeller for weakening wake - Google Patents
Centrifugal pump impeller for weakening wake Download PDFInfo
- Publication number
- CN218030770U CN218030770U CN202221949111.3U CN202221949111U CN218030770U CN 218030770 U CN218030770 U CN 218030770U CN 202221949111 U CN202221949111 U CN 202221949111U CN 218030770 U CN218030770 U CN 218030770U
- Authority
- CN
- China
- Prior art keywords
- blade
- wake
- centrifugal pump
- semicircular groove
- pump 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.)
- Active
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a weaken centrifugal pump impeller of wake, including the back shroud, evenly be provided with a plurality of blades along the circumferencial direction on the back shroud, the play water end of every blade is provided with semicircular groove, and semicircular groove sets up along the axial of back shroud. The utility model enhances the low-speed fluid at the bottom layer of the boundary layer at the tail part of the suction surface of the blade, the high-energy fluid in the main stream and the energy at the bottom layer of the boundary layer; the formation of vortexes near the water outlet edge of the blade is weakened, and the pressure pulsation near the tail end of the blade is reduced, so that the effect of reducing a wake region is achieved, the adverse pressure gradient is further reduced, and the internal separation phenomenon is delayed.
Description
Technical Field
The utility model belongs to the technical field of impeller structural improvement, a weaken centrifugal pump impeller of wake is related to.
Background
The low specific speed centrifugal pump refers to the specific speed n of the centrifugal pump s 30-80, and its notable features are small flow and high lift. Because of the low specific speed centrifugal pump impellerThe channel is long and narrow, the outlet width is small, the hydraulic loss is large, the friction loss of the disc is serious, and the running efficiency is low. The structure of the flow field in the pump is complex, the flow phenomena of impact, flow separation, cavitation, secondary flow and the like exist in the flow in the pump, the flow phenomena comprise backflow of a centrifugal impeller inlet, secondary flow in an impeller flow channel and jet-wake structure and flow separation in the impeller flow channel, the factors are mutually influenced and mutually promoted to form, and finally, the liquid flow in the impeller flow channel is uneven under the action of the blade, the liquid flow is strong near a pressure surface and weak near a suction surface. Under the action of the reverse pressure gradient, the boundary layer near the suction surface of the outlet is easy to separate, so that the liquid flow generates backflow and defluidization near the boundary layer. Therefore, it becomes a considerable problem to improve the efficiency of the centrifugal pump.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a centrifugal pump impeller for weakening wake, which can ensure that the low-speed fluid at the tail end of the suction surface of the blade can be more stably mixed with the high-energy fluid in the main flow; and the formation of vortexes near the water outlet edge of the blade is weakened, the pressure pulsation near the tail end of the blade is reduced, so that the effect of reducing a wake region is achieved, the phenomenon that liquid flow generates backflow and defluidization near a boundary layer is improved, and the adverse pressure gradient is further reduced, so that the internal separation phenomenon is delayed.
The utility model discloses the technical scheme who adopts is, weakens the centrifugal pump impeller of wake, including the back shroud, evenly be provided with a plurality of blade along the circumferencial direction on the back shroud, the water outlet end of every blade is provided with semicircular groove.
The utility model discloses a characteristics still lie in:
each blade is spirally distributed on the surface of the rear cover plate.
The ratio R/L of the radius of the semicircular groove to the thickness of the water outlet side of the blade is =1/4.
The ratio H/L of the circle center position of the semicircular groove to the width of the water outlet side is =2/3.
The length of the semicircular groove is the same as the height of the blade.
The utility model has the advantages that the utility model reduces the collision between the fluids by arranging the semicircular groove at the water outlet edge of the blade, so that the stability of the fluid flowing in the flow channel is improved, the impact is reduced, and the vortex generated in the semicircular groove plays a leading role in the flowing in the semicircular groove; the semicircular groove can also weaken the tendency that a main flow at the outlet deviates from the suction surface and turns to flow on one side of the pressure surface, so that the speed distribution of the outlet of the impeller is more uniform, and the energy of a low-speed fluid of a boundary layer at the tail end of the suction surface and the bottom layer of the boundary layer is enhanced; and the formation of vortexes near the water outlet edge of the blade is weakened, and the pressure pulsation near the tail end of the blade is reduced, so that the effect of reducing a wake region is achieved, the adverse pressure gradient is further reduced, and the internal separation phenomenon is delayed.
Drawings
FIG. 1 is a schematic view of the centrifugal pump impeller for weakening the wake of the present invention;
fig. 2 is a schematic view of the enlarged partial structure of the semicircular groove in the centrifugal pump impeller for weakening the wake of the present invention.
In the figure, 1, a rear cover plate;
2. the blade, 2-1, the pressure surface, 2-2, the suction surface;
3. a semicircular groove.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses weaken centrifugal pump impeller of wake, as shown in fig. 1, 2, including back shroud 1, evenly be provided with a plurality of blades 2 along the circumferencial direction on back shroud 1, the play water end of every blade 2 is provided with semicircular groove 3, and semicircular groove 3 sets up along the axial of back shroud 1. The number of vanes 2 is dependent on the design parameters of the actual centrifugal pump. The ratio R/L of the radius of the semicircular groove 3 to the thickness of the water outlet side is =1/4.
The ratio H/L =2/3 of the circle center position of the semicircular groove 3 to the width of the water outlet side of the blade 2. The length of the semicircular groove 3 is the same as the height of the blade 2.
The utility model discloses weaken centrifugal pump impeller's of wake theory of operation is:
when the centrifugal pump runs normally, fluid enters a flow channel on the rear cover plate 1 along the blade 2 and rotates clockwise along the blade 2, and a vortex is generated in the semicircular groove 3 at the water outlet end of the blade 2, so that the boundary layer and energy are enhanced, the semicircular groove 3 can also weaken the tendency that the main flow at the outlet deviates from the suction surface 2-2 of the blade 2 and turns to flow at one side of the pressure surface 2-1, the speed distribution of the outlet of the impeller is more uniform, and the low-speed fluid of the boundary layer at the tail end of the suction surface and the energy of the bottom layer of the boundary layer are enhanced; the formation of vortexes near the water outlet edge of the blade is weakened, and the pressure pulsation near the tail end of the blade is reduced, so that the effect of reducing a wake region is achieved, the adverse pressure gradient is further reduced, and the internal separation phenomenon is delayed.
Claims (4)
1. Weaken centrifugal pump impeller of wake, its characterized in that: the water-saving type fan blade comprises a rear cover plate (1), wherein a plurality of blades (2) are uniformly arranged on the rear cover plate (1) along the circumferential direction, and a semicircular groove (3) is formed in the water outlet end of each blade (2);
each blade (2) is spirally distributed on the surface of the rear cover plate (1).
2. The wake attenuated centrifugal pump impeller of claim 1, wherein: the ratio R/L =1/4 of the radius of the semicircular groove (3) to the thickness of the water outlet side of the blade (2).
3. The wake attenuated centrifugal pump impeller of claim 1, wherein: the ratio H/L =2/3 of the circle center position of the semicircular groove (3) to the width of the water outlet side.
4. The wake attenuated centrifugal pump impeller of claim 1, wherein: the length of the semicircular groove (3) is the same as the height of the blade (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221949111.3U CN218030770U (en) | 2022-07-25 | 2022-07-25 | Centrifugal pump impeller for weakening wake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221949111.3U CN218030770U (en) | 2022-07-25 | 2022-07-25 | Centrifugal pump impeller for weakening wake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218030770U true CN218030770U (en) | 2022-12-13 |
Family
ID=84387419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221949111.3U Active CN218030770U (en) | 2022-07-25 | 2022-07-25 | Centrifugal pump impeller for weakening wake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218030770U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117627955A (en) * | 2023-12-05 | 2024-03-01 | 吉林大学 | Emulsion breaking prevention latex pump impeller |
-
2022
- 2022-07-25 CN CN202221949111.3U patent/CN218030770U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117627955A (en) * | 2023-12-05 | 2024-03-01 | 吉林大学 | Emulsion breaking prevention latex pump impeller |
| CN117627955B (en) * | 2023-12-05 | 2024-06-11 | 吉林大学 | Emulsion breaking prevention latex pump impeller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN218030770U (en) | Centrifugal pump impeller for weakening wake | |
| CN102748324A (en) | Centrifugal pump impeller with low specific speed | |
| CN101865160A (en) | Partial emission pump with low specific speed | |
| CN111425450A (en) | Centrifugal pump blade with bionic sawtooth structure at front edge and tail edge | |
| CN212376954U (en) | Centrifugal pump semi-open impeller with gap channel arranged on blade top | |
| CN111536073A (en) | Centrifugal pump semi-open impeller with gap channel arranged on blade top | |
| CN112302993A (en) | Centrifugal pump impeller with offset wing type short blades | |
| CN112855607A (en) | Centrifugal pump impeller with a plurality of short blades | |
| CN201281045Y (en) | Conformal passage type diffuser | |
| CN109667787B (en) | Radial-flow fish pump impeller and radial-flow fish pump | |
| CN109098974A (en) | It is a kind of can gas-liquid delivery high-lift multi-stage side channel pump | |
| CN110439724A (en) | A kind of francis turbine runner for hydraulic | |
| CN101363452A (en) | Conformality passage type diffuser and three-dimensional design method thereof | |
| CN110529426B (en) | Open impeller structure for high-speed pump | |
| CN219587797U (en) | Deep well pump and flow guiding structure thereof | |
| CN115977994A (en) | Centrifugal pump blade top structure capable of reducing leakage flow of blade top gap | |
| CN115773273A (en) | Centrifugal semi-open impeller with gap channel arranged on blade top | |
| CN209145959U (en) | A kind of low specific-speed centrifugal pump impeller | |
| CN104279180A (en) | Double-suction impeller | |
| CN210769506U (en) | Open impeller structure for high-speed pump | |
| CN115704393A (en) | Centrifugal pump with axial flow impeller connected in series at inlet | |
| CN212202595U (en) | Centrifugal pump blade with bionic sawtooth structure at front edge and tail edge | |
| CN204113732U (en) | A kind of double-entry impeller | |
| CN208503101U (en) | A kind of centrifugal pump half-opened impeller | |
| CN219549192U (en) | Centrifugal pump blade with flow state improving function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |