CN210343838U - Open impeller and small-flow high-lift single-stage centrifugal pump using same - Google Patents
Open impeller and small-flow high-lift single-stage centrifugal pump using same Download PDFInfo
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- CN210343838U CN210343838U CN201921295557.7U CN201921295557U CN210343838U CN 210343838 U CN210343838 U CN 210343838U CN 201921295557 U CN201921295557 U CN 201921295557U CN 210343838 U CN210343838 U CN 210343838U
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- open impeller
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- pump
- main blade
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Abstract
The utility model provides an open impeller and use open impeller's low discharge high lift single-stage centrifugal pump, including wheel hub and along its radial extended bottom plate, the central part of bottom plate is equipped with the opening of evenly arranging, the front and the reverse side of bottom plate all are equipped with the blade, positive blade includes positive main blade and positive auxiliary blade, the blade at the back includes back main blade and back auxiliary blade, the length of positive main blade and back main blade is wheel hub to the distance of bottom plate outer fringe, the length of positive auxiliary blade and back auxiliary blade is the distance of opening to bottom plate outer fringe on the bottom plate, the height of positive main blade is followed wheel hub extremely the bottom plate outer fringe direction evenly reduces, the height of back main blade is followed wheel hub extremely bottom plate outer fringe direction height equals. The utility model discloses an open impeller, the water conservancy diversion of blade is effectual, avoids the liquid swirl production between the blade, and hydraulic efficiency is high.
Description
Technical Field
The utility model relates to a field be the fluid machinery field, particularly, especially relate to an open impeller and use open impeller's low discharge high-lift single-stage centrifugal pump.
Background
In the field of fluid delivery, delivery conditions of a few cubic to tens of cubic meters of flow per hour and a delivery head of two hundred or more meters are often encountered, and the centrifugal pump with the ultra-low specific speed is one of the accepted technical problems in the pump industry, and the development and development of the centrifugal pump are always troubled because the centrifugal pump with the parameters has a plurality of special technical problems: the large-diameter narrow-flow-passage closed impeller is difficult to manufacture, low in pump efficiency and prone to hump in a lift curve, so that the pump is unstable when running in a small-flow area, a shaft power curve rises faster than that of a conventional centrifugal pump, and a motor is prone to overload when the flow is large.
In order to solve the above technical problem, there are three methods:
firstly, a multistage pump is adopted: the single-stage specific speed is improved. The stage number of the pump is increased, the length of the shaft is increased due to the increase of the stage number, the rigidity is reduced, the pump is easy to have the phenomena of friction occlusion and the like, and the operation reliability is reduced.
And the second is to adopt a reflux mode. The outlet pipeline of the pump is connected with a return pipeline, the return flow is larger than the conveying amount under the normal condition, the power of the motor is additionally increased, the power consumption is increased, and the use cost is high.
Thirdly, a plunger pump is adopted, but pulse vibration during operation of the plunger pump cannot be solved, the problem of operational reliability is more, and meanwhile, the use cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art existence, provide an open impeller and use the high-lift single-stage centrifugal pump of low discharge of this impeller.
The utility model discloses a following technical scheme realizes: an open impeller comprises a hub and a bottom plate extending along the radial direction of the hub, wherein flow holes which are uniformly distributed are formed in the central part of the bottom plate, blades are arranged on the front side and the back side of the bottom plate, the blades on the front side comprise a front main blade and a front auxiliary blade, the blades on the back side comprise a back main blade and a back auxiliary blade, the lengths of the front main blade and the back main blade are the distances from the hub to the outer edge of the bottom plate, the lengths of the front auxiliary blade and the back auxiliary blade are the distances from the flow holes in the bottom plate to the outer edge of the bottom plate, the heights of the front blades are uniformly reduced from the hub to the outer edge of the bottom plate, and the heights of the back blades are equal from the hub to the outer edge of the bottom plate;
preferably, the number of the main blades on the front surface and the back surface is equal to the number of the circulation holes;
preferably, the number of the auxiliary blades on the front surface and the back surface is respectively 4 times of the number of the main blades;
the small-flow high-lift single-stage centrifugal pump using the open impeller comprises a pump body, wherein a pump body inlet and a pump body outlet are formed in the pump body, a shaft is arranged in the pump body, the open impeller is arranged on the shaft and fixed on the shaft through a key and an impeller nut, a guide vane and a pump cover are respectively arranged on two sides of the open impeller, the guide vane and the pump cover are fixed through a screw, and gaps are formed among the open impeller, the guide vane and the pump cover;
preferably, a spiral liquid collecting cavity is designed between the inner part of the guide vane and the outer edge of the open impeller;
preferably, a diffusion channel is arranged on one side of the guide vane close to the pump cover, and the liquid collection cavity is communicated with the inner wall of the pump body through the diffusion channel;
preferably, a mechanical seal is arranged at the position where the shaft extends out of the pump cover;
preferably, a deep groove ball bearing is arranged on one side of the shaft close to the open impeller, and a pair of angular contact ball bearings is arranged on one side of the driving end of the shaft.
The utility model discloses an innovation point lies in: adopted the utility model discloses an open impeller, the axial force of impeller itself can be eliminated in the through-flow hole of equipartition on the impeller bottom plate, and positive blade and back of the body blade can produce the lift simultaneously, make under the same impeller external diameter the total lift that open impeller produced higher. The flow rate of the pump can be controlled to a few tenths of a cube by varying the flow area at the inlet of the diffuser passage on the guide vane.
The beneficial effects of the utility model reside in that: the open impeller is used without a front cover plate and a rear cover plate, so that the disc loss is reduced, and the efficiency is higher than that of a closed impeller and a semi-open impeller. The mixed arrangement of long and short blades increases the number of blades, simultaneously reduces the diffusion degree of a flow channel between the blades, has good flow guide effect, avoids the generation of liquid vortex between the blades, and has high hydraulic efficiency. The utility model discloses replace multistage pump and plunger pump, need not to beat the backward flow, ability accurate control flow, the dependable performance is stable, and the vibration is extremely low.
Drawings
Fig. 1 is a schematic perspective view of an open impeller of the present invention;
fig. 2 is a front view of the open impeller of the present invention;
fig. 3 is a back view of the open impeller of the present invention;
fig. 4 is a side view of the open impeller of the present invention;
fig. 5 is a schematic perspective view of the guide vane of the present invention;
fig. 6 is a front view of the guide vane of the present invention;
FIG. 7 is a perspective view of the small-flow high-lift single-stage centrifugal pump of the present invention;
fig. 8 is the utility model discloses low discharge high lift single-stage centrifugal pump structure sketch map.
Description of the parts: 1. the device comprises a pump body, 2, a pump inlet, 3, a pump outlet, 4, a pump cover, 5, guide vanes, 6, an impeller, 7, a mechanical seal, 8, a shaft, 9, a key, 10, a deep groove ball bearing, 11, an angular contact ball bearing, 101, a front main blade, 102, a front auxiliary blade, 201, a back main blade, 202, a back auxiliary blade, 301, a circulation hole, 401, a hub, 601, a bottom plate, 1101, a liquid collecting cavity, 1102 and a diffusion channel.
Detailed description of the invention
For a better understanding and appreciation of the invention, reference will now be made in detail to the following description of the invention taken in conjunction with the accompanying drawings. However, these embodiments are not limited to the present invention, and all changes in structure, method, and function that may be made by a designer in the field of the present invention are included in the scope of the present invention.
As shown in fig. 1 to 4, the utility model discloses an open impeller, bottom plate 601 including wheel hub 401 and along its radial extension, the central part of bottom plate 601 is equipped with through-flow hole 301 of evenly arranging, bottom plate 601 openly is equipped with positive main blade 101 and positive auxiliary blade 102, the bottom plate 601 back is equipped with back main blade 201 and back auxiliary blade 202, the length of front main blade 101 back main blade 201 is the distance of wheel hub 401 to bottom plate 601 outer fringe, the length of front auxiliary blade 102 and back auxiliary blade 202 is the distance of bottom plate 601 through-flow hole 301 outer fringe to bottom plate 601 outer fringe, the height of front main blade 101 evenly reduces from wheel hub 401 to bottom plate 601 outer fringe direction, the height of front auxiliary blade 102 evenly reduces from through-flow hole 301 outer fringe to bottom plate 601 outer fringe direction, the height of back main blade 201 is from wheel hub 401 to bottom plate 601 outer fringe direction highly equals, the height of back auxiliary blade 202 is from through-flow hole 301 outer fringe to bottom plate 601 outer fringe direction highly equals.
Open impeller with ventilation holes has the advantages that: the front cover plate and the rear cover plate are not arranged, so that the disc loss is reduced, and the efficiency is higher than that of a closed impeller and a semi-open impeller; the number of the blades is increased due to the mixed arrangement of the long blades and the short blades, the diffusion degree of a flow channel between the blades is reduced, the flow guide effect of the blades is good, the generation of liquid vortex between the blades is avoided, and the hydraulic efficiency is high; third is the axial force that the discharge orifice on the impeller bottom plate can eliminate impeller itself, and positive blade and back of the body blade can produce the lift simultaneously, make under with the impeller external diameter the total lift that open impeller produced higher.
As shown in fig. 7 and fig. 8, the utility model also discloses an use the high-lift single-stage centrifugal pump of low discharge capacity of above-mentioned open impeller and stator, including the pump body 1, set up entry 2 and export 3 on the pump body 1 are provided with axle 8 in the pump body 1, are equipped with open impeller 6 on the axle 8, and open impeller 6 passes through key 9 and impeller nut setting on axle 8, and the drive end of axle 8 is provided with a pair of angular contact ball bearing 11, is provided with deep groove ball bearing 10 near open impeller 6 one side, and axle 8 stretches out pump cover 4 department and is provided with mechanical seal 7, and supporting mechanical seal long service life, sealing performance is reliable. As shown in fig. 5 and 6, the utility model also discloses a with stator 5 that open impeller cooperation was used, cavity 1101 is collected for spiral liquid to stator 5 inside, and the stator is close to pump cover one side and is equipped with diffusion channel 1102, and cavity 1101 is collected through diffusion channel 1102 and pump body interior wall intercommunication to liquid. The utility model discloses a bearing box surface arranged the heat dissipation gusset, but natural cooling or fan cooling.
The utility model discloses a behind the foretell structural feature, the performance parameter scope that can reach as follows:
flow rate: 0.3 to 44.5 m3/h
Lift: 7 to 320 m
Rotating speed: 1450-2980 r/min
It should be understood that the present description has been made in terms of embodiments, but not every embodiment includes only one independent technical solution, and the above-mentioned ranges of flow and lift are implemented by a plurality of technical solutions, and such description of the present description is only for the purpose of clearly expressing the intention.
A series of detailed descriptions listed above are specific descriptions and illustrations of feasible embodiments of the present invention for several years, and are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the core contents of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. An open impeller comprises a hub (401) and a bottom plate (601) extending along the radial direction of the hub, and is characterized in that the central part of the bottom plate (601) is provided with uniformly arranged flow holes (301), the front and back of the bottom plate (601) are provided with blades, the blades on the front comprise a front main blade (101) and a front auxiliary blade (102), the blades on the back comprise a back main blade (201) and a back auxiliary blade (202), the lengths of the front main blade (101) and the back main blade (201) are the distance from the hub (401) to the outer edge of the bottom plate, the lengths of the front auxiliary blade (102) and the back auxiliary blade (202) are the distance from the flow holes (301) on the bottom plate (601) to the outer edge of the bottom plate, and the height of the front main blade is uniformly reduced from the hub (401) to the outer edge of the bottom plate (601), the height of the back main blade is equal from the hub (401) to the outer edge of the bottom plate (601).
2. An open impeller according to claim 1, characterised in that the number of main blades (101, 102) on the front and back sides is equal to the number of flow openings (301).
3. An open impeller according to claim 1 or 2, characterised in that the number of the front and back secondary blades (102, 202) is 4 times the number of the primary blades (101, 102), respectively.
4. The small-flow high-lift single-stage centrifugal pump with the open impeller comprises a pump body (1), wherein a pump body inlet (2) and a pump body outlet (3) are formed in the pump body (1), and a shaft (8) is arranged in the pump body (1), and is characterized in that the open impeller (6) is arranged on the shaft (8), the open impeller (6) is fixed on the shaft (8) through a key (9) and an impeller nut, a guide vane (5) and a pump cover (4) are respectively arranged on two sides of the open impeller (6), the guide vane (5) and the pump cover (4) are fixed through a screw, and gaps are formed between the open impeller (6) and the guide vane (5) as well as between the open impeller (6) and the pump cover (4).
5. The small flow high lift single stage centrifugal pump using an open impeller according to claim 4, characterized in that a spiral liquid collection chamber (1101) is provided between the inner part of the guide vane (5) near the outer edge of the open impeller (6).
6. The small flow high lift single stage centrifugal pump using an open impeller according to claim 4 or 5, characterized in that the side of the guide vane (5) close to the pump cover (4) is provided with a diffusion channel (1102), and the liquid collection chamber (1101) is communicated with the pump body inner wall through the diffusion channel (1102).
7. The small flow high lift single stage centrifugal pump using an open impeller according to claim 4 or 5, characterized in that the shaft (8) is provided with a mechanical seal (7) where it extends out of the pump cover (4).
8. The small flow high lift single stage centrifugal pump using an open impeller according to claim 4 or 5, characterized in that the side of the shaft (8) close to the open impeller (6) is provided with a deep groove ball bearing (10), and the side of the driving end of the shaft (8) is provided with a pair of angular contact ball bearings (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921295557.7U CN210343838U (en) | 2019-08-12 | 2019-08-12 | Open impeller and small-flow high-lift single-stage centrifugal pump using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921295557.7U CN210343838U (en) | 2019-08-12 | 2019-08-12 | Open impeller and small-flow high-lift single-stage centrifugal pump using same |
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| Publication Number | Publication Date |
|---|---|
| CN210343838U true CN210343838U (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921295557.7U Active CN210343838U (en) | 2019-08-12 | 2019-08-12 | Open impeller and small-flow high-lift single-stage centrifugal pump using same |
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| CN (1) | CN210343838U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319053A (en) * | 2019-08-12 | 2019-10-11 | 烟台阳光泵业有限公司 | Unshrouded impeller and the low-flow high-lift centrifugal pump of single stage type for using unshrouded impeller |
-
2019
- 2019-08-12 CN CN201921295557.7U patent/CN210343838U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319053A (en) * | 2019-08-12 | 2019-10-11 | 烟台阳光泵业有限公司 | Unshrouded impeller and the low-flow high-lift centrifugal pump of single stage type for using unshrouded impeller |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221017 Address after: Room 1902, Building 2, MSD-G District, TEDA, No. 57, Second Street, Economic and Technological Development Zone, Binhai New Area, Tianjin 300457 Patentee after: Sunshine pump (Tianjin) Co.,Ltd. Patentee after: YANTAI SUNSHINE PUMP Co.,Ltd. Address before: 809 Xincheng street, Muping Economic Development Zone, Yantai City, Shandong Province 264100 Patentee before: YANTAI SUNSHINE PUMP Co.,Ltd. |
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| TR01 | Transfer of patent right |