CN203570668U - Semi-open type self-cutting blockage-free pump impeller - Google Patents
Semi-open type self-cutting blockage-free pump impeller Download PDFInfo
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- CN203570668U CN203570668U CN201320647476.5U CN201320647476U CN203570668U CN 203570668 U CN203570668 U CN 203570668U CN 201320647476 U CN201320647476 U CN 201320647476U CN 203570668 U CN203570668 U CN 203570668U
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Abstract
The utility model relates to a semi-open type self-cutting blockage-free pump impeller. The semi-open type self-cutting blockage-free pump impeller is characterized in that a semi-open type double-vane structure is adopted, the diameter of a central wheel hub at the position of an inlet is about one half the diameter of a wheel hub of an ordinary impeller, a vane rear covering plate streamline (10) extends in the direction of an inlet edge to a graphical representation position of the inlet, a cutter (3) is naturally formed at the inlet of impeller vanes (4) due to the self structure, an cutting edge is hardened after thermal treatment and has a self-cutting function, when long fibers, large particles and other solid impurities flow into the impeller from the inlet of the pump along with a fluid, the impurities are cut up under the cutting action of the cutter (3) at the front edges of the vanes at the position of the impeller, and therefore blockage of a flowing way is reduced, and the passing capacity of fibers and other solid entangled matter is improved. By means of a combined structure of the cutter (3) and the double vanes with a large wrap angle, the semi-open type self-cutting blockage-free pump impeller is high in overall operating efficiency, is good in passing capacity and entanglement resistance, operates stably, has a cutting function, is simple in structure, and is obvious in energy-saving effect.
Description
Technical field
The present invention relates to a kind of Non-blinding pump impeller that can carry sewage medium, particularly carry the pump impeller equipment that contains major diameter particle, long fibre medium, belong to sewage transport equipment technical field.
Background technique
At present, when pump is pumped sewage dirt medium, because being usually mingled with various large particles, long fibre in medium as impurity such as long plastic optical fibre, bastose, when carrying, pump is prone to blockage problem, thereby affect passing through performance and operational efficiency, reliability and the working life of reducing pump of pump; When impeller is wound around, need shut down processing, will make pump maintenance rate improve, and then affect working efficiency and delay industrial production.Therefore, pump impeller realization is to be badly in need of at present the key technology of solution without obstruction and high-efficiency operation.
The structural type of sewage pump is in the market more, and common product has Double Channel Pump, wide impeller outlet sewage pump and with the sewage pump of cutting device.(1) Double Channel Pump.This pump is crooked runner from impeller inlet to impeller outlet, is applicable to carrying the fluid containing large particle and fibrous substance, and this impeller is very thick and heavy, and be 2～3 times of weights of general impeller, waste material, the noise of pump operation and vibration are also relatively large, and do not have from cutting function.If contain large particle and long fibre impurity 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 improves design conventionally on clean waterpump impeller channel, only by strengthening impeller blade width of flow path, become sewage pump, this the way is relatively low, wide blade exit causes the power overload of large flow district, easy motor damage, its blade import is common clean waterpump design method, and import is very easily stopped up 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, cutting blade is installed separately, although can realize cutting, complex structure, has increased part, slitting wheel, in rotary course, also consume relatively high power, significantly increase air horsepower, have reduced the way; This slitting wheel parts are difficult for cutting 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 on sewage pump, promotes at present.
Through retrieval, published patent " a kind of half-opened impeller is without stopping up cutting pump " (application number: 201120437806.9), it is installed for shredding the cutter disc of 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, become complicated, cost of pump structure is increased, and cutter disc device need to consume a part of power, cause efficiency, lift and the flow of pump to decline, if small-bore pump, itself has also blocked the passing capacity of pump this cutting device, causes obstruction 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 in pump housing water inlet fixing diversion cutting cylinder, and diversion cutting cylinder is provided with the hole of passing through of fed sheet of a media and foreign material, but cutter device is installed as mentioned above makes pump structure complicated, cost increase etc., although this pump can be within the scope of certain granules fed sheet of a media, make pump operation be difficult for stopping up, not easy to wear, if but grain diameter will cause the obstruction of diversion cutting cylinder while being greater than the aperture on diversion cutting cylinder, what affect pump passes through performance and operational efficiency.
Summary of the invention
For addressing the above problem, this patent has been invented a kind of Non-blinding pump impeller efficiently having from cutting function, and slitting wheel and impeller have structurally been realized integrated, do not need to install separately cutter device, have improved 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 blade inlet channel place center hub diameter is about 50% of conventional clean waterpump impeller; Impeller is adopted as half-opened impeller, without front shroud; Blade front/rear cover plate current line all protracts to inlet side direction, projection line in the axis projection of blade import and axis are 90 degree, blade import adopts sweepback shape, approximately 90 °～150 ° of the angles that blade back shroud streamline extends forward than general impeller inlet, and subtended angle of blade is 300 °～340 ° scopes.The 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, and unique impeller blade design makes the rear self-assembling formation cutting knife of blade import processing, then through techniques such as Overheating Treatment, improve blade hardness, blade is now equivalent to the metal cutting tools of circumferencial direction rotation.When sewage pump high speed operation, entrance edge of blade edge is the cutting knife-edge of High Rotation Speed, when the materials such as large particle and long fibre enter impeller inlet edge with flowing medium, the cutting knife of blade import cuts off long fibre, when if large solid particle enters, slitting wheel can make the solid particle size that enters impeller meet the size of grain scope that impeller can be carried by large particle chopping for granule, thereby improved this Non-blinding pump impeller, carry the ability that contains large particle and long fibre material.
The invention has the beneficial effects as follows, new blade has realized the protract unification of structure and cutting of blade, make 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 from cutting function, the material cuttings such as large particle and long fibre can be ground, so that the transportation of Non-blinding pump.
Accompanying drawing explanation
Fig. 1 is that semi-open type is from cutting the three-dimensional string diagram of Non-blinding pump impeller
Fig. 2 is that semi-open type is from cutting Non-blinding pump impeller plan view
Fig. 3 is that semi-open type is from cutting Non-blinding pump impeller left view
Tu4Wei blade axis projection and isohypse transversal figure
Fig. 5 is impeller slitting wheel partial enlarged drawings
In Fig. 1,1. impeller hub, 2. impeller inlet, 3. slitting wheel, 4. blade, 5. back shroud
In Fig. 2, δ is blade sweepback angle, and θ is subtended angle of blade, in Fig. 4, and 6. blade exit, 7. blade front shroud streamline, 8. blade import 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, the projection line in γWei 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 is from cutting 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 rotation, can realize the conveying of sewage medium.
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 of pump (flow, lift and rotating speed), determine the geometric parameter of impeller, as shown in Figure 4, calculate impeller hub (1) diameter D
hcalculated value get half of general clear water centrifugal pump calculated value, blade exit (6) width b
2get conventional centrifugal pump calculated value 1.5～2 times, the little person of specific speed, gets large value.Before blade, streamline (7), back shroud streamline (10) all protract to inlet side direction, extend to impeller inlet cylndrical surface (8) and locate, and the projection line in the axis projection of entrance edge of blade (9) and impeller axis angle γ are 90 °.Blade import (2) adopts sweepback shape, and blade back shroud streamline (10) extends forward angle than blade front shroud streamline (7), and 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 blade import laying angle is about 10～20 °, and in order to take into account the efficiency of pump, this angle can be adjusted according to blade import laying angle calculated value.By milling cutter, entrance edge of blade (9) milling is flat, self-assembling formation 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 media such as large particle and long fibre enter from impeller inlet (2), and through impeller blade import (2) slitting wheel when (3), can be by major diameter solid particle chopping in sewage medium, long fibre cuts off, and makes the sewage medium can be smoothly by entering impeller channel.This sewage pump impeller, cut protracting of integrated and blade, make that pump overall operation efficiency is high, passing ability and anti-entangling can be good, operate steadily.
The blade of slitting wheel (4) edge of a knife exit angle α=10～20 °, this size can realize the cutting function of blade.
Claims (3)
1. semi-open type is from cutting a Non-blinding pump impeller, and wherein this impeller is two blade semi-open types, it is characterized in that: described impeller Qi blade inlet is provided with slitting wheel (3) in order to shred the impurity such as long fibre, large particle.
2. a kind of semi-open type as claimed in claim 1 is from cutting Non-blinding pump impeller, 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 located in impeller inlet cylndrical surface (8), 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 as claimed in claim 1 is from cutting Non-blinding pump impeller, it is characterized in that: entrance edge of blade (9) adopts sweepback shape, be that than front shroud streamline (7), to extend forward angle δ be 90 °～150 ° to blade back shroud streamline (10), subtended angle of blade θ is 300 °～340 °, this inlet edge of impeller blade at grade, the import of blade (4) simultaneously adopts high twist structure, and blade (4) import laying angle is got 10～20 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320647476.5U CN203570668U (en) | 2013-10-12 | 2013-10-12 | Semi-open type self-cutting blockage-free pump impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320647476.5U CN203570668U (en) | 2013-10-12 | 2013-10-12 | Semi-open type self-cutting blockage-free pump impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203570668U true CN203570668U (en) | 2014-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320647476.5U Expired - Fee Related CN203570668U (en) | 2013-10-12 | 2013-10-12 | Semi-open type self-cutting blockage-free pump impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203570668U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351851A (en) * | 2015-07-15 | 2017-01-25 | 台州新宏基泵业有限公司 | Duplex sewage and dirt submersible electric pump |
| CN110671333A (en) * | 2019-09-29 | 2020-01-10 | 华中科技大学 | Multistage pump for lifting coarse particles in deep sea mining |
| WO2023151223A1 (en) * | 2022-02-11 | 2023-08-17 | 江苏大学 | Multi-stage semi-open centrifugal pump capable of reducing wear |
-
2013
- 2013-10-12 CN CN201320647476.5U patent/CN203570668U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351851A (en) * | 2015-07-15 | 2017-01-25 | 台州新宏基泵业有限公司 | Duplex sewage and dirt submersible electric pump |
| CN110671333A (en) * | 2019-09-29 | 2020-01-10 | 华中科技大学 | Multistage pump for lifting coarse particles in deep sea mining |
| WO2023151223A1 (en) * | 2022-02-11 | 2023-08-17 | 江苏大学 | Multi-stage semi-open centrifugal pump capable of reducing wear |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 Termination date: 20151012 |
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| EXPY | Termination of patent right or utility model |