CN104564795A - Semi-open self-cutting blockage-free pump impeller - Google Patents
Semi-open self-cutting blockage-free pump impeller Download PDFInfo
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- CN104564795A CN104564795A CN201310500551.XA CN201310500551A CN104564795A CN 104564795 A CN104564795 A CN 104564795A CN 201310500551 A CN201310500551 A CN 201310500551A CN 104564795 A CN104564795 A CN 104564795A
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- impeller
- blade
- inlet
- pump
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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
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
- F04D29/245—Geometry, shape for special effects
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- 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 relates to a semi-open self-cutting blockage-free pump impeller. The impeller is characterized in that a semi-open double-blade structure is adopted, diameter of a central hub at an inlet is about half that of a common impeller hub, a blade rear cover plate flow line (10) extends in an inlet edge direction to an inlet graphical position, an inlet of an impeller blade (4) naturally forms a cutting knife (3) by own structure, and a knife edge is hard after thermal treatment and has a self-cutting function; when solid impurities like long fibers and large particles flow in along with fluid from a pump inlet, the solid impurities are cut under cutting action of the cutting knife (3) at the front edge of the blade at the impeller, so that blockage of a runner is reduced, and through capacity of solid entanglement like fibers is improved. Due to a structure combining the cutting knife (3) with large-wrapping-angle double blades (4), so that a pump is high in overall running efficiency, through capacity and winding resistance, stable in running, simple in structure and remarkable in energy saving effect and has a cutting function.
Description
Technical field
The present invention relates to a kind of Non-blinding pump impeller can carrying wastewater media, particularly the pump impeller equipment of conveying containing major diameter particle, long fibre medium, belongs to sewage transport equipment technical field.
Background technique
At present, when sewage dirt medium pumped by pump, because being usually mingled with various large particle, long fibre in medium as impurity such as long plastic optical fibre, bastose, when carrying easily there is blockage problem in pump, thus affect pump by performance and operational efficiency, reduce the reliability of pump and working life; Need process be shut down when impeller is wound around, pump maintenance rate will be made to improve, and then affect working efficiency and delay industrial production.Therefore, pump impeller realizes without blocking and high-efficiency operation is the key technology being badly in need of at present solving.
The structural type of sewage pump is in the market more, and common product has Double Channel Pump, wide impeller outlet sewage pump and the sewage pump with cutting device.(1) Double Channel Pump.This pump is bending runner from impeller inlet to impeller outlet, and be applicable to the fluid that conveying contains large particle and fibrous substance, this impeller is very thick and heavy, and be 2 ~ 3 times of weights of general impeller, waste material, noise and the vibration of pump operation are also relatively large, and do not have Self cleavage function.If containing large particle and long fibrous impurities in medium, the runner of pump is also often blocked, causes pump cisco unity malfunction, even can motor damage.(2) wide impeller outlet sewage pump.This pump carries out Curve guide impeller usually on clean waterpump impeller channel, sewage pump is become by means of only increasing impeller blade width of flow path, this the way is relatively low, wide blade exit causes the power overload of large discharge district, easy motor damage, its vane inlet is common clean waterpump design method, and import very easily blocks and is wound around, and without cutting and grinding function.(3) with the sewage pump of independent slitting wheel.In order to realize cutting function, anterior at impeller inlet, install cutting blade separately, although can realize cutting, complex structure, adds part, and slitting wheel, in rotary course, also consume relatively high power, significantly increase air horsepower, reduce the way; This slitting wheel parts not easily cut elongated fibers, and easily make Filament-wound Machine at edge of a knife outer rim place, and block pumps impeller inlet runner, has obvious defect, therefore, not yet promotes on sewage pump at present.
Through retrieval, patent disclosed in oneself " a kind of half-opened impeller is without blocking cutting pump " (application number: 201120437806.9), it installs the cutter disc for shredding foreign material in half-opened impeller Non-blinding pump inlet, in order to cut the impurity such as large particle and long fibre, but this cutter disc device is installed, pump structure is made to become complicated, cost increases, and cutter disc device needs to consume a part of power, cause the efficiency of pump, lift and flow decline, if small-bore pump, this cutting device itself also blocks the passing capacity of pump, cause blocking to a certain degree, publication " a kind of screw cutting pump " (application number: 201120368996.3), it installs helical cut cutter on wheel rotation axle, and fix diversion cutting cylinder in pump housing water inlet, and diversion cutting cylinder is provided with the passing hole of fed sheet of a media and foreign material, but installing cutter device as mentioned above makes pump structure complicated, cost increase etc., although this pump can within the scope of certain granules fed sheet of a media, pump operation is not easily blocked, not easy to wear, but the blocking of diversion cutting cylinder when if grain diameter is greater than the aperture on diversion cutting cylinder, will be caused, affect pump by performance and operational efficiency.
Summary of the invention
For solving the problem, a kind of Non-blinding pump impeller efficiently with Self cleavage function of invention, slitting wheel and impeller structurally achieve integration, do not need to install cutter device separately, improve passing capacity and the operational efficiency of sewage dirt.
The technical solution adopted for the present invention to solve the technical problems is: Non-blinding pump impeller blade is two blade structure forms, and vane inlet runner place center hub diameter is about 50% of conventional clean waterpump impeller; Impeller is adopted as half-opened impeller, namely without front shroud; Blade front/rear cover plate current line all protracts to inlet side direction, projection line in the axis projection of vane inlet and axis are 90 degree, vane inlet adopts sweepback shape, the angle about 90 ° ~ 150 ° that blade back shroud streamline extends forward than general impeller inlet, and subtended angle of blade is 300 ° ~ 340 ° scopes.Structure of protracting blade both can improve the anti-Filament-wound Machine ability of blade, again for design slitting wheel structure provides condition.This half-opened impeller blade is when manufacturing, impeller inlet limit is processed by milling machine, unique impeller blade design, self-assembling formation cutting knife after vane inlet is processed, then improve blade stiffness through techniques such as Overheating Treatment, blade is now equivalent to the metal cutting tools that circumferencial direction rotates.When sewage pump high speed operation, vane inlet edge is the cutting knife-edge of High Rotation Speed, when the material such as large particle and long fibre enters impeller inlet edge with flowing medium, long fibre cuts off by the cutting knife of vane inlet, if when large solid particle enters, slitting wheel can by large particle chopping for granule, the size of grain scope making the solid particle size entering impeller meet impeller can to carry, thus improves the ability of this Non-blinding pump impeller conveying containing large particle and long fibrous materials.
The invention has the beneficial effects as follows, new blade achieves blade and to protract the unification of structure and cutting, such that pump overall operation efficiency is high, passing ability and anti-Filament-wound Machine performance good, operate steadily.And this Non-blinding pump impeller has Self cleavage function, the cutting of the material such as large particle and long fibre can be ground, so that the transport of Non-blinding pump.
Accompanying drawing explanation
Fig. 1 is the three-dimensional string diagram of semi-open type Self cleavage Non-blinding pump impeller
Fig. 2 is semi-open type Self cleavage Non-blinding pump impeller plan view
Fig. 3 is semi-open type Self cleavage Non-blinding pump impeller left view
Fig. 4 is blade axis projection and isohypse transversal figure
Fig. 5 is Impeller trim cutter partial enlarged drawing
In Fig. 1,1. impeller hub, 2. impeller inlet, 3. slitting wheel, 4. blade, 5. back shroud
[0013] in Fig. 2, δ is blade sweepback angle, and θ is subtended angle of blade,
In Fig. 4,6. blade exit, 7. blade front shroud streamline, 8. vane inlet cylndrical surface, 9. entrance edge of blade, 10. blade back shroud streamline, D
2for impeller inlet diameter, D
hfor impeller hub diameter, D
jfor impeller outlet diameter, b
2for impeller outlet width, γ is projection line in entrance edge of blade axis projection and impeller axis angle
In Fig. 5, α is edge of a knife exit angle
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Figure 1 shows that semi-open type Self cleavage impeller, it mainly comprises the parts such as impeller hub (1), impeller inlet (2), slitting wheel (3), blade (4), back shroud (5).Pump is connected with drive motor axle, is installed in pump spiral case, and when motor rotates, impeller rotates, and can realize the conveying of wastewater media.
Impeller adopts semi-open type structure, it is characterized by and only has back shroud (5), without front shroud.First, according to the design parameter (flow, lift and rotating speed) of pump, determine the geometric parameter of impeller, as shown in Figure 4, calculate impeller hub (1) diameter D
bcalculated value get the half of general clear water centrifugal pump calculated value, blade exit (6) width b
21.5 ~ 2 times that get conventional centrifugal pump calculated value, the little person of specific speed, takes large values.Before blade, streamline (7), back shroud streamline (10) all protract to inlet side direction, extend to impeller inlet cylndrical surface (8) place, the projection line in the axis projection of entrance edge of blade (9) and impeller axis angle γ are 90 °.Vane inlet (2) adopts sweepback shape, namely blade back shroud streamline (10) is than blade front shroud streamline (7) extension angle forward, blade sweepback angle δ is 90 ° ~ 150 °, subtended angle of blade θ be 300 ° ~ 340 ° as shown in Figure 2.The axis projection of this inlet edge of impeller blade and impeller shaft axis are 90 ° of angles, therefore, its at grade, as shown in Figure 3.Impeller adopts high twist structure, and vane inlet laying angle is about 10 ~ 20 °, and in order to take into account the efficiency of pump, this angle can adjust according to vane inlet laying angle calculated value.By milling cutter entrance edge of blade (9) milling put down, then naturally form slitting wheel (3), as shown in Figure 2 and Figure 5, then by blade (4) through heat treatment process, improve hardness, wear-resisting and anti-collision performance.When the sewage dirt such as large particle and long fibre medium enters from impeller inlet (2), and when impeller blade import (2) slitting wheel (3), can by major diameter solid particle chopping in wastewater media, long fibre cuts off, and enables wastewater media smoothly by entering impeller channel.This sewage pump impeller, cutting integration and the protracting of blade, such that pump overall operation efficiency is high, passing ability and anti-entangling can be good, operate steadily.
Blade (4) edge of a knife exit angle α=10 ~ 20 ° of slitting wheel, this size can realize the cutting function of blade.
Claims (4)
1. a semi-open type Self cleavage Non-blinding pump impeller, wherein this impeller is two blade semi-open types, it is characterized in that: the vane inlet slitting wheel (3) of described impeller are very sharp, hard, there is Self cleavage function, when the solid impurity such as long fibre, large particle flows into from pump inlet with fluid, the dissection of blade inlet edge slitting wheel (3) is subject at impeller place, thus the impurity such as long fibre, large particle is cut broken by its cut-out, thus decrease blocking up of runner, improve the passing capacity of the solid twisters such as fiber.
2. a kind of semi-open type Self cleavage Non-blinding pump impeller as claimed in claim 1, it is characterized in that: blade exit (6) width is 1.5 ~ 2 times of conventional centrifugal pump calculated value, entrance edge of blade (9) is at impeller inlet cylndrical surface (8) place, and the projection line in entrance edge of blade axis projection and impeller axis angle γ are 90 °.
3. a kind of semi-open type Self cleavage Non-blinding pump impeller as claimed in claim 1, it is characterized in that: entrance edge of blade (9) adopts sweepback shape, namely blade back shroud streamline (10) than front shroud streamline (7) forward extension angle δ be 90 ° ~ 150 °, subtended angle of blade θ is 300 ° ~ 340 °.At grade, the import of blade (4) simultaneously adopts high twist structure to this inlet edge of impeller blade, and blade (4) import laying angle gets 10 ~ 20 °.
4. a kind of semi-open type Self cleavage Non-blinding pump impeller as claimed in claim 1, it is characterized in that: by milling cutter, entrance edge of blade (9) milling is put down, then naturally form slitting wheel (3), then by vanes Overheating Treatment technique, hardness, wear-resisting and anti-collision performance is improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310500551.XA CN104564795A (en) | 2013-10-12 | 2013-10-12 | Semi-open self-cutting blockage-free pump impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310500551.XA CN104564795A (en) | 2013-10-12 | 2013-10-12 | Semi-open self-cutting blockage-free pump impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104564795A true CN104564795A (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310500551.XA Pending CN104564795A (en) | 2013-10-12 | 2013-10-12 | Semi-open self-cutting blockage-free pump impeller |
Country Status (1)
| Country | Link |
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| CN (1) | CN104564795A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179258A (en) * | 2015-10-27 | 2015-12-23 | 余雷 | Farm-oriented electric sewage suction pump |
| CN110645200A (en) * | 2019-09-04 | 2020-01-03 | 江苏大学 | Sewage pump impeller with cutting function and sewage pump |
| CN112879341A (en) * | 2021-01-22 | 2021-06-01 | 兰州理工大学 | High-cavitation-resistance backswept and split-flow offset type spiral centrifugal impeller |
-
2013
- 2013-10-12 CN CN201310500551.XA patent/CN104564795A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179258A (en) * | 2015-10-27 | 2015-12-23 | 余雷 | Farm-oriented electric sewage suction pump |
| CN110645200A (en) * | 2019-09-04 | 2020-01-03 | 江苏大学 | Sewage pump impeller with cutting function and sewage pump |
| CN112879341A (en) * | 2021-01-22 | 2021-06-01 | 兰州理工大学 | High-cavitation-resistance backswept and split-flow offset type spiral centrifugal impeller |
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Application publication date: 20150429 |
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