CN113833669A - Vortex supercharging principle-based anti-blocking submersible sewage pump impeller design method - Google Patents
Vortex supercharging principle-based anti-blocking submersible sewage pump impeller design method Download PDFInfo
- Publication number
- CN113833669A CN113833669A CN202111093360.7A CN202111093360A CN113833669A CN 113833669 A CN113833669 A CN 113833669A CN 202111093360 A CN202111093360 A CN 202111093360A CN 113833669 A CN113833669 A CN 113833669A
- Authority
- CN
- China
- Prior art keywords
- impeller
- blade
- angle
- submersible sewage
- sewage pump
- 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.)
- Withdrawn
Links
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
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
-
- 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
- F04D29/2205—Conventional flow pattern
- F04D29/2216—Shape, geometry
-
- 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
-
- 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
Abstract
The invention relates to the technical field of submersible sewage pump impellers, in particular to a design method of an anti-blocking submersible sewage pump impeller based on a vortex supercharging principlejOuter diameter D of inlet side of impeller2aOuter diameter D of outlet side of impeller2iWidth of impeller outlet b2Angle of inclination theta of water inlet edge1Wrap angle of blade phi and blade exit setting angle beta2The design calculation formula of (1); designed by adopting the inventionThe submersible sewage pump impeller solves the problems of easy blockage, low efficiency and poor cavitation performance of the submersible sewage pump.
Description
Technical Field
The invention relates to the technical field of submersible sewage pump impellers, in particular to a design method of an anti-blocking submersible sewage pump impeller based on a vortex supercharging principle.
Background
At present, for sewage lifting systemsThe pumps are mostly submersible sewage pumps provided with common centrifugal impellers. The common centrifugal impeller consists of a hub and a plurality of blades uniformly distributed around the hub, wherein a front cover plate and a rear cover plate are respectively arranged on two sides of each blade, and the main design parameters of the centrifugal impeller comprise the equivalent inner diameter D of an impeller inlet0Impeller outer diameter D2Width b of outlet2Wrap angle phi of blade and outlet setting angle beta of blade2And the like.
The main design parameters of the impeller in the traditional design method take the following values:
equivalent inner diameter D of impeller inlet0
D0＝K0·(Q/n)1/3(mm)
In the formula: q-flow of the pump, m3/S；
n-pump speed, rpm;
wherein, K0The value is 3.5-4.0 when the efficiency is mainly considered; k0The value is 4.0-4.5 when the efficiency and the cavitation are considered; k0The value is 4.5-5.5 during main cavitation;
outer diameter D of impeller2
D2＝(9.35～9.6)·(ns/100)-1/2·(Q/n)1/3(mm)
In the formula: q-flow of the pump, m3/S；
n-pump speed, rpm;
ns-the specific speed of the pump;
③ width b of impeller outlet2
b2＝0.64·(ns/100)5/6·(Q/n)1/3(mm)
In the formula: q-flow of the pump, m3/S；
n-pump speed, rpm;
ns-the specific speed of the pump;
4) blade wrap angle phi and blade outlet setting angle beta2
In general, the blade wrap angle φ follows the specific speed nsIs increased and decreased, the blade outlet setting angle beta2Speed n of revolutionsIs increased. For low specific speed pumps, the blade exit setting angle β is reduced due to reduced disc friction losses2And increasing the wrap angle phi of the blade.
The submersible sewage pump with the impeller is generally provided with the following disadvantages in the practical use process:
1. the hydraulic loss is large, the efficiency is low, so that the matched motor has large power and wastes electric energy;
2. due to the structural form, the impeller is high in abrasion speed, easy to block and high in maintenance cost;
3. the medium contains a certain amount of gas, and then cavitation is generated, even the medium cannot work, and the cavitation performance is poor.
Disclosure of Invention
The invention aims to provide a design method of an anti-blocking submersible sewage pump impeller based on a vortex supercharging principle, which is used for solving the problems that a submersible sewage pump in the prior art is easy to block, low in efficiency and poor in cavitation performance.
In order to achieve the purpose, the invention provides the following technical scheme: the design method of the impeller of the anti-blocking submersible sewage pump based on the vortex supercharging principle comprises a conical central body and spiral blades arranged on the outer wall of the conical central body, wherein the impeller formed by the conical central body and the spiral blades has the main design parameters including the inlet diameter D of the impeller according to the design requirements on the flow Q, the rotating speed n, the lift H and other parameters, and the main design parameters of the impeller are determinedjOuter diameter D of inlet side of impeller2aOuter diameter D of outlet side of impeller2iWidth of impeller outlet b2Angle of inclination theta of water inlet edge1Wrap angle of blade phi and blade exit setting angle beta2Determined by the following relationship:
Dj＝Kj·(Q/n)1/3
D2a＝(10.5～12)·(ns/100)-1/2·(Q/n)1/3，120＜ns≤350
D2a＝(12～13.5)·(ns/100)-1/2·(Q/n)1/3，ns＞350
D2i＝(9～10.5)·(ns/100)-1/2·(Q/n)1/3，120＜ns≤350
D2i＝7·(ns/100)-1/2·(Q/n)1/3，ns>350
b2＝2·(ns/100)5/6·(Q/n)1/3，120＜ns≤220
b2＝1.15·(ns/100)5/6·(Q/n)1/3，220＜ns≤350
b2＝0.85·(ns/100)5/6·(Q/n)1/3，ns＞350
θ1＝36，ns≤220
θ1＝15，ns＞220
Φ＝270～420
β2＝20～28
in the formula, Kj-taking 4.4-5.2;
Dj-impeller inlet diameter, mm;
D2a-impeller inlet side outer diameter, mm;
D2i-the outer diameter of the impeller outlet side, mm;
b2-impeller exit width, mm;
θ1-inclination of the water intake edge, °;
Φ -blade wrap angle, °;
β2-the blade outlet is set at an angle, °;
q-flow of the pump, m3/S；
n-pump speed, rpm;
ns-the specific speed of the pump;
inclination angle theta of water outlet edge2According to the above calculated D2a、D2i、b2Parameters can be determined; in addition, when the wrap angle of the blade takes a large value, the setting angle of the outlet of the blade takes a small value; blade wrap angleAnd when the small value is taken, the large value is taken as the blade outlet installation angle.
Compared with the prior art, the invention has the beneficial effects that:
1. the submersible sewage pump impeller is similar to a tornado type spiral supercharging principle, and the impeller rotation is used as induction to suck surrounding liquid, particularly solid particles, long fibers and the like into a central area and then send the liquid out of the pump, so that the submersible sewage pump impeller can effectively prevent pollution blockage, the service life of the submersible sewage pump impeller is prolonged, and the maintenance cost is greatly reduced.
2. The impeller outlet of the submersible sewage pump impeller has wide width, namely the width of a channel between the blades is wide and smooth, so that the flowing effect of fluid is better; the impeller is easy to cast, the surface smoothness of the flow channel is good, and the flow channel is not easy to block; the flow loss of the fluid in the flow channel is small, so that the efficiency of the impeller is improved to the maximum extent, and the efficiency is 5% -10% higher than that of a common submersible sewage pump.
3. The impeller of the submersible sewage pump has excellent cavitation performance, can be used for conveying liquid containing gas, and does not generate cavitation.
Drawings
FIG. 1 is a schematic perspective view of the impeller of the submersible sewage pump according to the present invention;
FIG. 2 is a schematic front view of the impeller of the submersible sewage pump according to the present invention;
FIG. 3 is a rear view structural schematic diagram of the whole impeller of the submersible sewage pump of the present invention;
FIG. 4 is a left side view schematic structural view of the whole impeller of the submersible sewage pump of the present invention;
FIG. 5 is a schematic right-view structural view of the whole impeller of the submersible sewage pump of the present invention;
FIG. 6 is a schematic top view of the impeller of the submersible sewage pump according to the present invention;
FIG. 7 is a schematic view of the overall structure of the impeller of the submersible sewage pump according to the present invention;
FIG. 8 is a schematic diagram of the main design parameters of the submersible sewage pump impeller of the present invention.
In the figure: 1-a conical central body; 2-helical blades.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1-8, the present invention provides a technical solution, and a method for designing an anti-clogging submersible sewage pump impeller based on a vortex supercharging principle, including a conical central body and spiral blades arranged on an outer wall of the conical central body, wherein an impeller formed by the conical central body and the spiral blades determines main design parameters of the impeller including an impeller inlet diameter D according to design requirements on parameters such as flow Q, rotation speed n, lift H, and the likejOuter diameter D of inlet side of impeller2aOuter diameter D of outlet side of impeller2iWidth of impeller outlet b2Angle of inclination theta of water inlet edge1Wrap angle of blade phi and blade exit setting angle beta2Determined by the following relationship:
Dj＝Kj·(Q/n)1/3
normally, submersible sewage pump has low requirement on cavitation performance, so KjTaking 4.4-5.2.
For a pump with lower rotating speed than the rotating speed pump, taking a smaller impeller outer diameter; for the pump higher than the rotary pump, the outer diameter of the impeller is slightly larger, and the following are taken:
D2a＝(10.5～12)·(ns/100)-1/2·(Q/n)1/3，120＜ns≤350
D2a＝(12～13.5)·(ns/100)-1/2·(Q/n)1/3，ns＞350
D2i＝(9～10.5)·(ns/100)-1/2(Q/n)1/3，120＜ns≤350
D2i＝7·(ns/100)-1/2·(Q/n)1/3，ns>350。
taking the wider impeller outlet width, often:
b2＝2·(ns/100)5/6·(Q/n)1/3，120＜ns≤220
b2＝1.15·(ns/100)5/6·(Q/n)1/3，220＜ns≤350
b2＝0.85·(ns/100)5/6·(Q/n)1/3，ns＞350。
the influence of the inclination angle of the water inlet edge on the hydraulic performance is small, and the universality of suction inlet parts is considered:
θ1＝36，ns≤220
θ1＝15，ns＞220
inclination angle theta of water outlet edge2According to the calculated D2a、D2i、b2The parameters can be determined.
On the premise of combining a vortex supercharging principle and considering anti-blocking, the single-blade large wrap angle is the best design scheme, phi is 270-420 usually, meanwhile, the selection of the blade mounting angle needs to be matched with the wrap angle, and beta is generally taken2When the wrap angle of the blade is large, the outlet setting angle of the blade is small; and when the wrap angle of the blade takes a small value, the mounting angle of the outlet of the blade takes a large value.
In the above-mentioned relation, the first and second expression,
Dj-impeller inlet diameter, mm;
D2a-impeller inlet side outer diameter, mm;
D2i-the outer diameter of the impeller outlet side, mm;
b2-impeller exit width, mm;
θ1-inclination of the water intake edge, °;
Φ -blade wrap angle, °;
β2-the blade outlet is set at an angle, °;
q-flow of the pump, m3/S；
n-pump speed, rpm;
nsspecific speed of the pump, ns＝3.65·n·Q1/2/H3/4。
The tornado is the strongest vortex phenomenon in the atmosphere, and is a strong wind vortex which extends from the thunderstorm cloud bottom to the ground or the water surface and has a small range and extremely high wind power.
The invention provides a design value taking method of a system according to a formation mechanism of tornado. By reasonably taking values of all parameters, the anti-blocking submersible sewage pump impeller based on the vortex supercharging principle is designed, and the impeller is optimally matched with other hydraulic parts, so that the optimized product with improved comprehensive efficiency is finally achieved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. A design method of an anti-blocking submersible sewage pump impeller based on a vortex supercharging principle comprises a conical middle partThe heart body (1) and set up in the heliciform blade (2) of cone central body (1) outer wall, its characterized in that: the impeller composed of the conical central body (1) and the spiral blades (2) determines main design parameters of the impeller according to design requirements such as flow Q, rotating speed n, lift H and the like, wherein the main design parameters comprise impeller inlet diameter DjOuter diameter D of inlet side of impeller2aOuter diameter D of outlet side of impeller2iWidth of impeller outlet b2Angle of inclination theta of water inlet edge1Wrap angle of blade phi and blade exit setting angle beta2Determined by the following relationship:
Dj＝Kj·(Q/n)1/3
D2a＝(10.5～12)·(ns/100)-1/2·(Q/n)1/3，120＜ns≤350
D2a＝(12～13.5)·(ns/100)-1/2·(Q/n)1/3，ns＞350
D2i＝(9～10.5)·(ns/100)-1/2·(Q/n)1/3，120＜ns≤350
D2i＝7·(ns/100)-1/2·(Q/n)1/3，ns>350
b2＝2·(ns/100)5/6·(Q/n)1/3，120＜ns≤220
b2＝1.15·(ns/100)5/6·(Q/n)1/3，220＜ns≤350
b2＝0.85·(ns/100)5/6·(Q/n)1/3，ns＞350
θ1＝36，ns≤220
θ1＝15，ns＞220
Φ＝270～420
β2＝20～28
in the formula, Kj-taking 4.4-5.2;
Dj-impeller inlet diameter, mm;
D2a-impeller intakeLateral outside diameter, mm;
D2i-the outer diameter of the impeller outlet side, mm;
b2-impeller exit width, mm;
θ1-inclination of the water intake edge, °;
Φ -blade wrap angle, °;
β2-the blade outlet is set at an angle, °;
q-flow of the pump, m3/S；
n-pump speed, rpm;
nsspecific speed of the pump.
2. The design method of the anti-clogging submersible sewage pump impeller based on the vortex supercharging principle as claimed in claim 1, wherein: when the wrap angle of the blade takes a large value, the mounting angle of the outlet of the blade takes a small value; and when the wrap angle of the blade takes a small value, the mounting angle of the outlet of the blade takes a large value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111093360.7A CN113833669A (en) | 2021-09-17 | 2021-09-17 | Vortex supercharging principle-based anti-blocking submersible sewage pump impeller design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111093360.7A CN113833669A (en) | 2021-09-17 | 2021-09-17 | Vortex supercharging principle-based anti-blocking submersible sewage pump impeller design method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113833669A true CN113833669A (en) | 2021-12-24 |
Family
ID=78959839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111093360.7A Withdrawn CN113833669A (en) | 2021-09-17 | 2021-09-17 | Vortex supercharging principle-based anti-blocking submersible sewage pump impeller design method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113833669A (en) |
-
2021
- 2021-09-17 CN CN202111093360.7A patent/CN113833669A/en not_active Withdrawn
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202273885U (en) | Efficient multi-air-outlet energy-saving explosion-proof fan | |
| JP4050324B2 (en) | Low head pump equipment for fish farms | |
| CN109611356A (en) | A kind of backward centrifugal blower | |
| CN201170207Y (en) | Energy-saving centrifugal type ventilation air fan | |
| CN106837855B (en) | A kind of double suction bilayer two blade impeller and its design method | |
| CN108547794A (en) | A kind of fire-fighting high-speed centrifugal pump | |
| CN201582198U (en) | Centrifugal fan used for airflow spinning machine process | |
| CN102312848B (en) | Efficient multi-air outlet energy-saving anti-explosion fan | |
| CN113833669A (en) | Vortex supercharging principle-based anti-blocking submersible sewage pump impeller design method | |
| CN109595197B (en) | Fan | |
| CN106547951A (en) | A kind of high anti-cavitation No-mistake Principle design method for centrifugal pump impeller | |
| CN109595198B (en) | Fan impeller | |
| CN202597227U (en) | Novel pump impeller | |
| CN202360458U (en) | Multi-wing centrifugal fan with reinforced air inlet function | |
| CN201448255U (en) | Backward high-pressure anti-explosion centrifugal ventilator | |
| WO2019006971A1 (en) | Impeller, fan and motor | |
| CN204783814U (en) | High -efficient tubing pump of low specific speed | |
| CN212615403U (en) | Volute structure of anti-blocking submersible sewage pump | |
| CN108953222B (en) | Centrifugal impeller | |
| CN207131636U (en) | A kind of centrifugal blower | |
| CN112833047A (en) | Double-suction centrifugal impeller with guide vanes and fan | |
| CN211009268U (en) | High-efficiency volute-free centrifugal fan | |
| CN206448967U (en) | A kind of electronic water pump impeller | |
| CN212717358U (en) | Double suction impeller and pump with ultra-low specific speed | |
| CN211449113U (en) | Single-side vaneless diffuser structure of centrifugal fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20211224 |