CN111336130A - Vortex pump impeller with groove structure - Google Patents
Vortex pump impeller with groove structure Download PDFInfo
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- CN111336130A CN111336130A CN202010034184.9A CN202010034184A CN111336130A CN 111336130 A CN111336130 A CN 111336130A CN 202010034184 A CN202010034184 A CN 202010034184A CN 111336130 A CN111336130 A CN 111336130A
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- impeller
- groove
- blades
- cover plate
- vortex pump
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- 230000005484 gravity Effects 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2272—Rotors specially for centrifugal pumps with special measures for influencing flow or boundary layer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a swirl pump impeller with a groove structure, which comprises impeller blades, a rear cover plate, a hub and back blades, wherein the impeller blades are positioned on one side of the rear cover plate, the back blades are positioned on the other side of the rear cover plate, the rear cover plate is provided with a groove, the groove is arranged in the middle of a blade flow passage between the impeller blades, and the shape of the groove is consistent with that of the blades. The vortex pump impeller has good hydraulic performance, and the back cover plate is additionally provided with the groove, so that the restriction of the impeller on fluid is enhanced, and the loss is reduced.
Description
Technical Field
The invention relates to the field of impellers, in particular to a swirl pump impeller with a groove structure.
Background
The swirl pump belongs to a non-clogging pump, is a multiphase flow pump which is named because of the rotational vortex motion existing in the internal flow of the swirl pump, and is mainly used for pumping complex media. The non-clogging characteristic of the vortex pump enables the vortex pump to be widely applied to the industries of sewage treatment, papermaking, chemical industry, pharmacy and the like. The impeller of the vortex pump is open or semi-open, the impeller is deviated to one side of the pump cavity or is completely retracted to the rear cavity of the pump shell, two different impeller arrangement modes form two vortex pump design concepts, and the two different arrangement modes are the results of balancing pumping performance and non-blocking performance. When the vortex pump works, a through flow is generated at the outlet of the impeller due to centrifugal force, medium exchange is generated between the middle section of the impeller and the bladeless cavity to form a circulating flow, impurities in the medium, such as solid particles, fibers and the like, mainly obtain energy by virtue of the circulating flow, and even are discharged through the outlet after directly moving in the bladeless cavity without passing through the impeller, so that the aim of conveying the impurities contained in the medium without blockage is fulfilled.
The vortex pump is a non-clogging pump suitable for conveying mixed media, but the traditional vortex pump also has certain defects, and because the existence of the circulating flow in the pump causes more hydraulic loss, the lift and the efficiency of the vortex pump are not high.
Through search, the patent of application number CN201610856829 "a swirl pump impeller with a spiral structure at the front end and a design method thereof", the invention is provided with a spiral blade at the front section of the impeller, the inner diameter of the spiral blade is fixed with the peripheral side of a hub, and the outer diameter of the spiral blade extends towards the far away of the hub. Through search, the patent of application number CN201410481963 discloses a design method of a non-clogging vortex pump impeller with long and short flanged blades, wherein the blades of the impeller comprise long blades and short blades with different lengths, and the long blades and the short blades are respectively provided with a flange extending in a direction opposite to the rotation direction of the impeller. It can be seen from existing patent, the improvement of vortex pump impeller has all reduced circulation flow intensity structure, has weakened the non-clogging nature of vortex pump promptly to a certain extent, and this patent is through structural improvement, does not change the flow state in the no leaf chamber, and through back shroud fluting, has the binding effect to liquid medium, reduces the loss, has the cutting function to solid fibre thing etc. not only has improved work efficiency, has still improved the non-clogging performance of vortex pump.
Disclosure of Invention
In order to solve the technical problem, the invention discloses a swirl pump impeller with a groove structure, which comprises impeller blades, a rear cover plate, a hub and back blades, wherein the impeller blades are positioned on one side of the rear cover plate, the back blades are positioned on the other side of the rear cover plate, the rear cover plate is provided with a groove, the groove is arranged in the middle of a blade flow passage between the impeller blades, and the shape of the groove is consistent with that of the blades.
Optionally, the geometric parameters of the groove and the geometric parameters of the impeller satisfy the following relationship:
b2＝(0.15～0.2)D2(3)
dg＝(0.250～0.365)δx(4)
β1＝25°～65° (5)
β2＝30°～50° (6)
in the formula:
Dg1-groove entrance diameter, m;
Dg2-the groove exit diameter, m;
D1-impeller inlet diameter, m;
D2-impeller exit diameter, m;
dg-groove depth, mm;
δx-back cover thickness, mm;
q-flow, m3/s；
n is rotational speed of the vortex pump, r/min;
h-pump design head, m;
g-acceleration of gravity, m/s2；
b2-impeller exit width, m;
β1-impeller inlet placement angle;
β2-impeller exit placement angle;
βg1-a groove entrance angle;
βg2-the groove exit angle;
z is the number of blades.
Optionally, the number of the impeller blades is 8-10, and the impeller blades are uniformly arranged on the cover plate.
Optionally, the number of grooves is the same as the number of impeller blades.
Optionally, the flute inlet angle is coincident with the impeller blade inlet angle and the flute outlet angle is coincident with the impeller blade outlet angle.
Optionally, the groove on the rear cover plate is milled flat by a milling cutter to have a sharp corner structure.
Optionally, the number of the back blades is 6-8, and the back blades are used for balancing axial force.
By adopting the technical scheme, the invention has the following beneficial effects:
the invention is improved based on the open design of the vortex pump, the impeller has better hydraulic performance and trafficability, and the groove structure in the flow channel can better restrain fluid, so that the flow velocity distribution in the flow channel is more stable, and partial hydraulic loss can be reduced; the groove is designed to be consistent with the shape of the impeller, so that working interference in the flow channel is avoided, flow state disorder is avoided, the pumping capacity of the vortex pump can be directly enhanced, and the performance of the pump is improved; the groove structure can reduce the pressure of the inlet of the pump and increase the risk of cavitation of the pump while improving the performance, but the cavitation resistance of the swirl pump is better due to the special structure of the groove structure, so that the swirl pump is more suitable for the improvement.
The impeller of the vortex pump provided by the invention can improve the efficiency of the vortex pump and can also improve the trafficability and no-overload performance of the pump, and the groove structure on the rear cover plate and the rear cover plate form a sharp corner angle, so that fibrous and granular solids can be cut and broken when the pump rotates at a high speed, solid-phase impurities can be effectively prevented from being wound and gathered, and the risk of blocking a flow channel is reduced; meanwhile, the groove structure is also beneficial to reducing the weight of the impeller and reducing the shaft power.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a front schematic view of a grooved impeller structure of a vortex pump;
FIG. 2 is a back view of a slotted vortex pump impeller structure;
FIG. 3 is a front view of a slotted vortex pump impeller;
FIG. 4 is a schematic view of a single flow channel of an impeller of the slotted vortex pump;
the following is a supplementary description of the drawings:
1. blade, 2 back shroud, 3 keyway, 4 recess, 5 hub, 6 back blade.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention.
Example (b):
with reference to fig. 1 to 4, an embodiment of the present invention discloses a swirl pump impeller with a groove structure, the impeller includes an impeller blade 1, a back cover plate 2, a hub 5 and a back blade 6, the impeller blade 1 is located on one side of the back cover plate 2, the back blade 6 is located on the other side of the back cover plate 2, the back cover plate 2 is provided with a groove, the groove is arranged in the middle of a blade flow channel between the impeller blades, and the shape of the groove is consistent with that of the blades. The hub 5 is located at the center of the rear cover plate 2, and the side wall of the hub is provided with a key groove 3.
In the embodiment, the shape of the groove is consistent with that of the blade and is positioned in the middle of the impeller flow passage, and the structure can enhance the restriction capacity of the impeller on fluid and improve the pumping capacity.
In some embodiments, the geometric parameters of the groove and the geometric parameters of the impeller satisfy the following relationship:
b2＝(0.15～0.2)D2(3)
dg＝(0.250～0.365)δx(4)
β1＝25°～65° (5)
β2＝30°～50° (6)
in the formula:
Dg1-groove entrance diameter, m;
Dg2-the groove exit diameter, m;
D1-impeller inlet diameter, m;
D2-impeller exit diameter, m;
dg-groove depth, mm;
δx-back cover thickness, mm;
q-flow, m3/s；
n is rotational speed of the vortex pump, r/min;
h-pump design head, m;
g-acceleration of gravity, m/s2；
b2-impeller exit width, m;
β1-impeller inlet placement angle;
β2-impeller exit placement angle;
βg1-a groove entrance angle;
βg2-the groove exit angle;
z is the number of blades.
The diameter of the inlet of the impeller blade is D1The diameter of the outlet of the impeller blade is D2The width of the outlet of the impeller blade is b2Inlet angle of blade β1Blade exit angle of β2The number of the impellers is Z, and the thickness delta of the back cover plate of the impellerxDepth of the groove is dg。
In some embodiments, the number of the impeller blades is 8-10, and the impeller blades are uniformly arranged on the cover plate.
In some embodiments, the number of grooves is the same as the number of impeller blades.
In some embodiments, the flute entrance angle is coincident with the impeller blade entrance angle and the flute exit angle is coincident with the impeller blade exit angle.
In some embodiments, the grooves on the back cover plate are milled flat with a milling cutter to have sharp corner structures, which have a cutting function.
In some embodiments, the back blades are 6-8 pieces, and the back blades are used for balancing the axial force.
Fig. 1, 3 and 4 together define the shape and size of the slotted swirl pump impeller.
In particular, in order to enhance the non-clogging of the vortex pumpThe stopper nature and the degree of difficulty that reduces the casting processing adopt cylindrical blade, for guaranteeing the vortex pump pumping capacity, choose 10 blades for use. In order to ensure that the blade flow passages have more stable speed distribution, a micro groove is arranged in the middle of each flow passage, the shape of the groove is consistent with that of the cylindrical blade, the depth of the groove is 1.5mm, namely dg＝1.5mm。
Compared with the impeller of the swirl pump without the groove structure, the impeller is preliminarily optimized, and the performance of the impeller is superior in similar products; the efficiency was 50.2% without grooves and 52.0% with grooves. The spiral-flow pump with the groove structure has the advantages that the lift of the spiral-flow pump is basically unchanged, the flow state in the pump is basically unchanged, the original solid-phase conveying capacity cannot be influenced, the efficiency is improved by nearly 2%, the groove structure effectively improves the internal flowing condition of the impeller, the physical property of the groove structure is improved in anti-blocking performance, and the work efficiency of the spiral-flow pump is comprehensively improved.
The impeller of the swirl pump can be used for multiphase flow working conditions and can be used for conveying media containing long fibers (such as straws, paper pulp, ropes, poultry feathers and the like) and solid particles (such as wood blocks, grains and the like) in the pump. It is more appropriate for the impeller arrangement to be located on one side of the pump chamber rather than fully set back to the rear side of the pump chamber.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a take groove structure's whirl pump impeller which characterized in that: the impeller comprises impeller blades (1), a rear cover plate (2), a hub (5) and back blades (6), wherein the impeller blades (1) are located on one side of the rear cover plate (2), the back blades (6) are located on the other side of the rear cover plate (2), grooves are formed in the rear cover plate (2), the grooves are formed in blade flow channels between the impeller blades, and the grooves are consistent in shape with the blades.
2. The notch structured vortex pump impeller of claim 1 wherein: the geometrical parameters of the groove and the geometrical parameters of the impeller meet the following relations:
b2＝(0.15～0.2)D2
dg＝(0.250～0.365)δx
β1＝25°～65°
β2＝30°～50°
in the formula:
Dg1-groove entrance diameter, m;
Dg2-the groove exit diameter, m;
D1-impeller inlet diameter, m;
D2-impeller exit diameter, m;
dg-groove depth, mm;
δx-back cover thickness, mm;
q-flow, m3/s；
n is rotational speed of the vortex pump, r/min;
h-pump design head, m;
g-acceleration of gravity, m/s2；
b2-impeller exit width, m;
β1-impeller inlet placement angle;
β2-impeller exit placement angle;
βg1-a groove entrance angle;
βg2-the groove exit angle;
z is the number of blades.
3. The notch structured vortex pump impeller of claim 1 wherein: the number of the impeller blades is 8-10, and the impeller blades are uniformly arranged on the cover plate.
4. The notch structured vortex pump impeller of claim 1 wherein: the number of the grooves is the same as that of the impeller blades.
5. The notch structured vortex pump impeller of claim 2 wherein: the groove entry angle is coincident with the impeller blade entry angle, and the groove exit angle is coincident with the impeller blade exit angle.
6. The notch structured vortex pump impeller of claim 1 wherein: the groove on the rear cover plate is milled flat by a milling cutter and then has a sharp corner structure.
7. The notch structured vortex pump impeller of claim 1 wherein: the back blade is 6 ~ 8, the back blade is used for balancing axial force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010034184.9A CN111336130A (en) | 2020-01-14 | 2020-01-14 | Vortex pump impeller with groove structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010034184.9A CN111336130A (en) | 2020-01-14 | 2020-01-14 | Vortex pump impeller with groove structure |
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| CN111336130A true CN111336130A (en) | 2020-06-26 |
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| CN202010034184.9A Pending CN111336130A (en) | 2020-01-14 | 2020-01-14 | Vortex pump impeller with groove structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879342A (en) * | 2021-01-22 | 2021-06-01 | 江苏大学 | Centrifugal pump impeller with groove type auxiliary blades |
| CN113417885A (en) * | 2021-05-26 | 2021-09-21 | 夏秋月 | High-cavitation vortex pump impeller treatment method |
| CN114810623A (en) * | 2022-04-16 | 2022-07-29 | 江苏大学流体机械温岭研究院 | Vane pump health monitoring and evaluating method and device based on Mahalanobis distance |
| CN115030914A (en) * | 2022-06-16 | 2022-09-09 | 江苏大学镇江流体工程装备技术研究院 | Low-vibration impeller of vortex pump |
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| CN104005985A (en) * | 2014-05-16 | 2014-08-27 | 江苏大学 | Multiple-blade blocking-free pump impeller and design method thereof |
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| CN105736405A (en) * | 2016-04-19 | 2016-07-06 | 湖南天一奥星泵业有限公司 | Small-flow high-lift centrifugal pump |
| CN109340177A (en) * | 2018-11-28 | 2019-02-15 | 西华大学 | Vortex pump impeller with small wing blade |
| CN212297010U (en) * | 2020-01-14 | 2021-01-05 | 江苏大学镇江流体工程装备技术研究院 | Vortex pump impeller with groove structure |
-
2020
- 2020-01-14 CN CN202010034184.9A patent/CN111336130A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101198793A (en) * | 2005-06-17 | 2008-06-11 | Itt制造企业公司 | A pump |
| US20090169365A1 (en) * | 2005-06-17 | 2009-07-02 | Itt Manufacturing Enterprises Inc. | Pump |
| CN104005985A (en) * | 2014-05-16 | 2014-08-27 | 江苏大学 | Multiple-blade blocking-free pump impeller and design method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879342A (en) * | 2021-01-22 | 2021-06-01 | 江苏大学 | Centrifugal pump impeller with groove type auxiliary blades |
| CN113417885A (en) * | 2021-05-26 | 2021-09-21 | 夏秋月 | High-cavitation vortex pump impeller treatment method |
| CN114810623A (en) * | 2022-04-16 | 2022-07-29 | 江苏大学流体机械温岭研究院 | Vane pump health monitoring and evaluating method and device based on Mahalanobis distance |
| CN114810623B (en) * | 2022-04-16 | 2023-09-22 | 江苏大学流体机械温岭研究院 | Marsh distance-based vane pump health monitoring and evaluating method and device |
| CN115030914A (en) * | 2022-06-16 | 2022-09-09 | 江苏大学镇江流体工程装备技术研究院 | Low-vibration impeller of vortex pump |
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