CN107503979B - Non-equidistant blade solid-liquid two-phase sewage pump impeller - Google Patents
Non-equidistant blade solid-liquid two-phase sewage pump impeller Download PDFInfo
- Publication number
- CN107503979B CN107503979B CN201710976004.7A CN201710976004A CN107503979B CN 107503979 B CN107503979 B CN 107503979B CN 201710976004 A CN201710976004 A CN 201710976004A CN 107503979 B CN107503979 B CN 107503979B
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- blade
- blades
- long
- impeller
- inlet
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- 239000007788 liquid Substances 0.000 title claims abstract description 19
- 239000010865 sewage Substances 0.000 title claims abstract description 14
- 230000008676 import Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 8
- 239000007787 solid Substances 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 5
- 239000000835 fiber Substances 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
-
- 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
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
- F04D29/245—Geometry, shape for special effects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a non-equidistant blade solid-liquid two-phase sewage pump impeller, which can convey high-viscosity solid-liquid two-phase fluid, and the maximum weight concentration of the fluid can reach 35-55%, and mainly comprises a rear cover plate (5), a plurality of long blades A (1), long blades B (2), secondary long blades (3), inlet short blades (4) and back blades (6), and is characterized in that: the impeller is a semi-open centrifugal impeller, the blades are non-equidistant blades and are provided with inlet short blades; the secondary long blade (3) is positioned between the long blade A (1) and the long blade B (2); the blade outlet width b0 of the inlet short blade is smaller than the impeller outlet width b2. The invention has excellent adaptability to solid particles with different sizes, tissues, long and short fibers and the like, can avoid the blockage of the solid particles and the like at the hub, increases the permeability of the solid particles of the impeller, ensures that the impeller operates in normal working conditions, has good balance and operates stably and reliably.
Description
Technical Field
The invention relates to the field of fluid machinery, in particular to a non-equidistant blade solid-liquid two-phase sewage pump impeller.
Background
The impeller is used for directly transmitting mechanical energy of the prime motor to liquid, the motor drives the impeller to rotate, the centrifugal force is used for throwing out water, and the energy is converted into static pressure by the pump shell so as to increase static pressure energy and kinetic energy (mainly increasing static pressure energy) of the liquid.
In the sewage pump, when the sewage and dirt medium is pumped, various particles with different sizes, long fibers, household garbage and other impurities are often mixed in the medium, so that the problem of blockage of a pump impeller is easily caused, the passing performance and the running efficiency of the pump are influenced, and the reliability and the service life of the pump are reduced. And the pump impeller needs to be shut down for maintenance when being wound, so that the working efficiency is seriously affected, and the development of industrial production and environmental protection work is prevented. Therefore, the realization of key technologies such as non-blockage and efficient operation of the pump impeller is particularly important for the sewage pump. In order to increase the passing performance of the impeller on sewage impurities, the traditional sewage pump is usually realized by adopting a single-channel impeller and a double-channel impeller with inlet diameter and larger passing area at the expense of the hydraulic performance of the pump, the impeller is usually thick and heavy, the radial force is large, the starting and stopping vibration noise of a pump unit is strong, and the abrasion of parts such as a mouth ring, a bearing, a mechanical seal and the like is easy to cause; for equidistant vane type centrifugal pump impellers, though the efficiency is higher, the passing performance and the adaptability to solid particles with different sizes are poor, as domestic garbage such as paper towels and long fibers in rain sewage is more and more, the domestic garbage is easy to hang on the vanes, the impeller is blocked, and the stable operation of a unit is influenced.
Disclosure of Invention
In order to solve the problems of the prior art, the invention provides a non-equidistant blade solid-liquid two-phase sewage pump impeller. The technical scheme adopted specifically is as follows:
Non-equidistant blade solid-liquid two-phase dredge pump impeller mainly includes a back shroud (5) and a plurality of long blade A (1), long blade B (2), next-long blade (3), import short blade (4) and back of body blade (6), its characterized in that: the impeller is a semi-open centrifugal impeller, the blades are non-equidistant blades, the blade interval between a long blade A (1) and an adjacent secondary long blade (3) is defined as t1, the blade interval between a long blade B (2) and the adjacent secondary long blade (3) is defined as t2, the blade interval between the long blade A (1) and the adjacent long blade B1 (7) is defined as t3, and t1< t2< t3; the inlet short blades (4) are arranged at the inlet of the impeller and are positioned between the impeller hub and the diameter of the inlet of the impeller; the secondary long blade (3) is positioned between the long blade A (1) and the long blade B (2); the back blades (6) are arranged on the back of the impeller and positioned on the back cover plate (5); the blade outlet width b0 of the inlet short blade (4) is smaller than the impeller outlet width b2.
Further, the number of the short inlet blades (4) is 2, the short inlet blades are distributed in a central symmetry mode, and the outer diameter of the short inlet blades (4) is not larger than the inlet diameter of the impeller.
Further, the inlet edges of the long blades A (1) and the long blades B (2) are connected at the position close to the impeller hub, the outlet placing angle of the long blades A (1) is larger than the outlet placing angle of the long blades B (2), and the blade wrap angle of the long blades A (1) is smaller than the blade wrap angle of the long blades B (2).
Further, the spacing between the blades satisfies the following formula: t1:t2:t3=1:2:3.5.
Further, the blade inlet diameter of the secondary long blade (3) is slightly larger than the blade outer diameter of the inlet short blade (4) and is 1.05-1.15 times of the blade outlet outer diameter of the inlet short blade (4), and the outlet outer diameter of the secondary long blade (3) is equal to the impeller outer diameter.
Further, the vane outlet width b0 and the vane outlet width b2 of the inlet short vane satisfy the following relationship:
b0＝(0.4～0.65)·b2。
the beneficial effects of the invention are as follows:
1. The impeller can convey high-viscosity solid-liquid two-phase fluid, the maximum weight concentration of the fluid can reach 35-55%, and the impeller adopts non-equidistant blades, so that the impeller has excellent adaptability to solid particles, tissues, long and short fibers and the like with different sizes;
2. An inlet short blade is arranged between the impeller hub and the diameter of the impeller inlet, and small vortex is generated at the inlet by the rotation of the short blade, so that the blockage of solid particles and the like at the hub is avoided, the permeability of the impeller to the solid particles with different sizes is improved, and the impeller operates in a normal working condition;
3. Compared with thick single-channel and double-channel impellers, the non-equidistant blade solid-liquid two-phase sewage pump impeller has high efficiency, light weight and greatly saves the use of materials, and has good balance, small radial force and stable operation due to the symmetrical distribution of the blades, and noise and vibration are reduced during the running and starting and stopping of a unit, thereby greatly prolonging the service life of rotor components such as mechanical seals, bearings and the like.
Drawings
The invention is further described below with reference to the drawings and the detailed description.
FIG. 1 is an axial projection of an impeller of a non-equidistant vane solid-liquid two-phase dredge pump in accordance with an embodiment of the present invention;
FIG. 2 is a plan view of a non-equidistant vane solid-liquid two-phase dredge pump impeller in accordance with an embodiment of the invention;
In the figure: 1. a long blade A;2. a long blade B;3. a second long blade; 4. inlet short blades; 5. a back cover plate; 6. a back blade; 7. long blade B1.
Detailed Description
The invention provides a non-equidistant blade solid-liquid two-phase sewage pump impeller, as shown in figures 1 and 2, which are respectively an axial projection view and a plan view of an embodiment of the invention.
The utility model provides a non-equidistant blade solid-liquid two-phase dredge pump impeller, mainly includes a back shroud 5 and a plurality of long blade A1, long blade B2, next-long blade 3, import short blade 4 and back of body blade 6, its characterized in that: the impeller is a semi-open centrifugal impeller, the blades are non-equidistant blades, the blade interval between a long blade A1 and an adjacent secondary long blade 3 is defined as t1, the blade interval between a long blade B2 and the adjacent secondary long blade 3 is defined as t2, the blade interval between the long blade A1 and an adjacent long blade B17 is defined as t3, and t1 is less than t2 is less than t3; the inlet short blades 4 are arranged at the inlet of the impeller and are positioned between the impeller hub and the diameter of the inlet of the impeller; the secondary long blade 3 is positioned between the long blade A1 and the long blade B2; the back blade 6 is arranged on the back of the impeller and positioned on the back cover plate 5; the blade outlet width b0 of the inlet short blade 4 is smaller than the impeller outlet width b2.
Further, the number of the short inlet blades 4 is 2, the short inlet blades 4 are distributed in a central symmetry mode, and the outer diameter of the short inlet blades 4 is not larger than the inlet diameter of the impeller.
Further, the inlet edges of the long blades A1 and the long blades B2 are connected at the position close to the impeller hub, the outlet placing angle of the long blades A1 is larger than the outlet placing angle of the long blades B2, and the blade wrap angle of the long blades A1 is smaller than the blade wrap angle of the long blades B2.
Further, the spacing between the blades satisfies the following formula: t1:t2:t3=1:2:3.5.
Further, the blade inlet diameter of the second long blade) is slightly larger than the blade outer diameter of the inlet short blade 4 and is 1.05-1.15 times of the blade outlet outer diameter of the inlet short blade 4, and the outlet outer diameter of the second long blade 3 is equal to the impeller outer diameter.
Further, the vane outlet width b0 and the vane outlet width b2 of the inlet short vane satisfy the following relationship:
b0＝(0.4～0.65)·b2。
It should be understood that although the present disclosure has been described in terms of various embodiments, not every embodiment is provided with a separate technical solution, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the technical solutions in the various embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.
Claims (4)
1. The utility model provides a non-equidistant blade solid-liquid two-phase dredge pump impeller, is including a back shroud (5) and a plurality of long blade A (1), long blade B (2), next-long blade (3), import short blade (4) and back of body blade (6), its characterized in that: the impeller is a semi-open centrifugal impeller, the blades are non-equidistant blades, the blade spacing between a long blade A (1) and an adjacent secondary long blade (3) is defined as t1, the blade spacing between a long blade B (2) and the adjacent secondary long blade (3) is defined as t2, and the blade spacing between the long blade A (1) and the adjacent long blade B (7) is defined as t3; the inlet short blades (4) are arranged at the inlet of the impeller and are positioned between the impeller hub and the diameter of the inlet of the impeller; the secondary long blade (3) is positioned between the long blade A (1) and the long blade B (2); the back blades (6) are arranged on the back of the impeller and positioned on the back cover plate (5); the blade outlet width b0 of the inlet short blade (4) is smaller than the impeller outlet width b2; the long blades A (1), the long blades B (2), the secondary long blades (3), the inlet short blades (4) are a group of blades, and the whole impeller is provided with 2 groups of blades which are distributed in a center-to-center manner; the number of the inlet short blades (4) is 2, the inlet short blades are distributed in a central symmetry manner, and the outer diameter of the inlet short blades (4) is not larger than the inlet diameter of the impeller; the spacing between the blades satisfies the following formula: t1:t2:t3=1:2:3.5.
2. The non-equidistant vane solid-liquid two-phase blowdown pump impeller of claim 1, wherein: the inlet edges of the long blades A (1) and the long blades B (2) are connected at the position close to the impeller hub, the outlet placing angle of the long blades A (1) is larger than the outlet placing angle of the long blades B (2), and the blade wrap angle of the long blades A (1) is smaller than the blade wrap angle of the long blades B (2).
3. The non-equidistant vane solid-liquid two-phase blowdown pump impeller of claim 1, wherein: the blade inlet diameter of the secondary long blade (3) is slightly larger than the blade outer diameter of the inlet short blade (4) and is 1.05-1.15 times of the blade outlet outer diameter of the inlet short blade (4), and the outlet outer diameter of the secondary long blade (3) is equal to the impeller outer diameter.
4. The non-equidistant vane solid-liquid two-phase sewage pump impeller according to claim 1, wherein the vane outlet width b0 and the impeller outlet width b2 of the inlet short vane satisfy the following relationship:
b0＝(0.4～0.65)·b2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710976004.7A CN107503979B (en) | 2017-10-19 | 2017-10-19 | Non-equidistant blade solid-liquid two-phase sewage pump impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710976004.7A CN107503979B (en) | 2017-10-19 | 2017-10-19 | Non-equidistant blade solid-liquid two-phase sewage pump impeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107503979A CN107503979A (en) | 2017-12-22 |
| CN107503979B true CN107503979B (en) | 2024-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710976004.7A Active CN107503979B (en) | 2017-10-19 | 2017-10-19 | Non-equidistant blade solid-liquid two-phase sewage pump impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107503979B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007315333A (en) * | 2006-05-29 | 2007-12-06 | Hitachi Plant Technologies Ltd | Centrifugal fluid machine |
| CN101432527A (en) * | 2006-04-25 | 2009-05-13 | Ihc荷兰知识产权有限公司 | Centrifugal pump impeller |
| CN105221477A (en) * | 2015-10-16 | 2016-01-06 | 江苏大学 | A kind of asymmetric solid-liquid two-phase flow centrifugal impeller Hydraulic Design Method |
| CN106337833A (en) * | 2015-07-06 | 2017-01-18 | 杭州三花研究院有限公司 | Impeller, centrifugal pump and electric drive pump |
| CN207278564U (en) * | 2017-10-19 | 2018-04-27 | 江苏国泉泵业制造有限公司 | A kind of non-equidistant blade solid-liquid two-phase blowdown pump impeller |
-
2017
- 2017-10-19 CN CN201710976004.7A patent/CN107503979B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101432527A (en) * | 2006-04-25 | 2009-05-13 | Ihc荷兰知识产权有限公司 | Centrifugal pump impeller |
| JP2007315333A (en) * | 2006-05-29 | 2007-12-06 | Hitachi Plant Technologies Ltd | Centrifugal fluid machine |
| CN106337833A (en) * | 2015-07-06 | 2017-01-18 | 杭州三花研究院有限公司 | Impeller, centrifugal pump and electric drive pump |
| CN105221477A (en) * | 2015-10-16 | 2016-01-06 | 江苏大学 | A kind of asymmetric solid-liquid two-phase flow centrifugal impeller Hydraulic Design Method |
| CN207278564U (en) * | 2017-10-19 | 2018-04-27 | 江苏国泉泵业制造有限公司 | A kind of non-equidistant blade solid-liquid two-phase blowdown pump impeller |
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| Publication number | Publication date |
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| CN107503979A (en) | 2017-12-22 |
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