CN103671231A - Inverted S-shaped blockage-free pump impeller - Google Patents
Inverted S-shaped blockage-free pump impeller Download PDFInfo
- Publication number
- CN103671231A CN103671231A CN201310687530.3A CN201310687530A CN103671231A CN 103671231 A CN103671231 A CN 103671231A CN 201310687530 A CN201310687530 A CN 201310687530A CN 103671231 A CN103671231 A CN 103671231A
- Authority
- CN
- China
- Prior art keywords
- impeller
- leading edge
- degree
- blade
- pump impeller
- 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.)
- Granted
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an inverted S-shaped blockage-free pump impeller. The inverted S-shaped blockage-free pump impeller is mainly used for conveying life and industrial sewage containing fibers and solid particles, and the impeller is of a closed impeller structure. The inverted S-shaped blockage-free pump impeller is provided with two highly twisted blade structures which adapt to the fluid mechanics principle, the blades stretch forwards to an inlet, and the front edges of the blades rapidly sweep forwards. The front edges of the blades are thickened and rounded out, and therefore the anti-winding capacity is enhanced. After a hub is specially rounded out, dirt is prevented from winding the hub. The inverted S-shaped blockage-free pump impeller has the advantages that the through capacity and the anti-winding capacity of the impeller are enhanced, the impeller is closed, hydraulic efficiency of the impeller is improved, running energy consumption of a pump is reduced, the requirements for materials and the process are lowered, and production cost of the impeller is lowered.
Description
Technical field
The present invention relates to a kind of Non-blinding pump impeller, it is mainly used to carry the sewage dirt medium with particle and fiber, belongs to fluid machinery technical field.
Background technique
At present, when pump is pumped sewage dirt medium, often because being mingled with various large particles, long fibre in medium, such as impurity such as long plastic optical fibre, bastose, when carrying, dirt is easily wrapped on wheel hub, thereby cause pump to be prone to plugging fault, thereby affect passing through performance and operational efficiency, reliability and the working life of reducing pump of pump; In industrial production, when Filament-wound Machine appears in sewage pump impeller, conventionally need to shut down to process, cause pump maintenance rate to improve, and then affect industrial production and cause larger economic loss.Therefore, the realization of sewage pump impeller is the technology that current sewage treatment industry is badly in need of innovation and raising without obstruction and high-efficiency operation.
The structural type of sewage pump is in the market more, wherein take semi-open centrifugal impeller as main, strengthens inlet diameter and width and improves passing capacity, and most typical is the N series pump of ITT Mfg. Enterprises, Inc..98120840.1) and " pump " (application number: 98120838.X) refer to Patent Document " pump impeller " (application number:, as shown in Figure 1, it adopts half-opened impeller, blade is protracted and allow leading-edge sweep, allow like this dirt along leading edge to peripolesis, enter in the cutting groove on static front shroud, impeller and cutting groove coordinate, dirt is cut, reach from cutting object.But there is open defect in the impeller of this structural type: 1), because this impeller is half-opened impeller structure, this structure causes pump hydraulic efficiency to reduce by 10% left and right, and pump long-time running waste energy consumption is serious, and Economy is poor; 2) coordinate between cutting structure is to the wear resistance of material and hardness, front shroud and impeller on pump impeller and pump cover, the processing technology of cutting groove etc. all has very high requirement, complex manufacturing, and cost increases, and pump is expensive, and cost performance is lower; 3) when sharp-pointed particle or the clogging cutting groove of dirt; the edge of a knife groove of being everlasting during impeller there will be stuck phenomenon; cause power of motor moment rising; when situation is serious, can cause motor damage, and when hard buildup of solids is in cutting groove; the cutting power of pump will decline; and then dirt is wrapped on blade, can not realize impeller without stopping up operation, maintenance cost improves simultaneously.
Summary of the invention
For addressing the above problem, this patent has been innovated a kind of " anti-S " type Non-blinding pump impeller, impeller has 2 pieces of blades, according to fluid motion rule, blade is at suction side design height distorted-structure, and two pieces of leaf natural transition simultaneously form " anti-S " type blade entry shape.For single blade, at front shroud lateral lobe sheet, stretch forward, form sweepforward structure, because impeller inlet has the flow rate of water flow of 3～5m/s conventionally, under the impact of current, sewage dirt flows to axle center hub place along leading edge place outside impeller mouth, in the process of down motion, a part of fiber and solid particle flow in blade passage smoothly.But also there is a small amount of Motion of solid particle to impeller central position, the wheel hub of " anti-S " type Non-blinding pump impeller adopts special arcuation transition structure to process, make the dirts such as fiber can not be wrapped on wheel hub, and the axial flow velocity at impeller inlet center is larger, current impact the dirts such as fiber with larger axial velocity, can impel it to accelerate by impeller channel, reach impeller running without the target of stopping up.
The technical solution adopted for the present invention to solve the technical problems is: this impeller is provided with two blades, impeller is closed type structure, the leading edge of blade is to periphery sweepforward, segment angle θ between leading edge and front shroud tie point and described leading edge and wheel hub tie point, at initial point, be arranged in the cylindrical-coordinate system on axis, get 50 degree to 150 degree.
Because impeller leading edge is from wheel hub to periphery sweepforward, thus from importer to, if impeller turns counterclockwise, leading edge is " anti-S " shape; Sweepforward angle is defined as: the angle of every bit place leading edge normal and peripheral velocity in leading edge; The value of this sweepforward angle is limited in 45 degree within the scope of 60 degree in leading edge and front shroud tie point place, is limited in 25 degree within the scope of 40 degree, the sweepforward angle of all the other each points smooth change between the two in leading edge and wheel hub tie point place.
The actual thickness of blade is 1.5～3 times of general blade actual thickness, wherein, the vane thickness at leading edge and front shroud tie point place is general impeller 1.5～2 times, the vane thickness at leading edge and wheel hub tie point place is general impeller 2～3 times.
Blade inlet edge is carried out to elliptic cavetto, and oval major semi axis is 2 to 5 with the span of the ratio of semi-minor axis.
Wheel hub is carried out to elliptic cavetto, and place, axle center is used half elliptic section (b-b) and wheel hub flange upper blade section (a-a, c-c) to be smoothly connected; The major semi axis of wherein supposing the cross section of a-a and c-c is all r
1, the ratio of their major semi axis and semi-minor axis is δ
1, to the requirement of b-b, be: the major semi axis of b-b is got r
1, its δ and δ
1pass be δ=0.3～0.8 δ
1.
The cornerite of blade is got 150 degree to 200 degree.
Impeller inlet cross section of fluid channel likeness in form is oval, at utmost guarantees that large diameter solid particle passes through.
The invention has the beneficial effects as follows, " anti-S " type Non-blinding pump impeller blade adopts unique leading edge sweepforward form and elliptic cavetto structure, coordinate special semiellipse face wheel hub, strengthened the passing capacity of impeller, adopt double shrouded wheel simultaneously, increase the hydraulic efficiency of impeller, and reduced the requirement of material and process aspect, at utmost reduced cost.
Accompanying drawing explanation
Fig. 1 be fly power N series pump impeller radial section schematic diagram
Fig. 2 is " anti-S " type Non-blinding pump impeller graphics
Fig. 3 is the radial section schematic diagram of " anti-S " type Non-blinding pump impeller
Fig. 4 is the axial schematic diagram in impeller suction side
Fig. 5 is the enlarged view of impeller individual blade leading edge
Fig. 6 is the aerofoil profile figure of blade inlet edge and wheel hub tie point place blade cavetto
Fig. 7 is impeller hub place sectional view
In Fig. 3,1. impeller axis, the 2. circular import of impeller, 3. front shroud, 4. non-penetration type wheel hub, 5. blade, 6. blade inlet edge, 7. leading edge and wheel hub tie point, 8. leading edge and front shroud tie point, 9. trailing edge, 10. non-penetration type axis hole, 12. wheel hub end faces
In Fig. 4,11. vane rotary directions, θ is that angle is scanned in sweepforward, a-a, b-b and c-c are the signal of wheel hub sectional position
In Fig. 5,13. leading edge normals, u is peripheral velocity, β is sweepforward angle
In Fig. 6 and Fig. 7, r
1for oval major semi axis, r
2for oval semi-minor axis
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
In Fig. 3 and Fig. 4, blade (5) is designed to the form of its leading edge (6) sweepforward, can make like this dirt slide to axle center along leading edge (6), prevents from being wrapped on leading edge and front shroud tie point (8); The peripheral velocity of considering close axle center is more much smaller than the peripheral velocity of close periphery, can effectively reduce like this possibility of winding; As shown in Figure 3, take in the cylindrical-coordinate system that axle center is initial point, definition leading edge and wheel hub tie point (7) scan angle θ to the sweepforward of leading edge and front shroud tie point (8), described in scan angle at 50 degree between 150 degree, can not reduce hydraulic efficiency like this; Meanwhile, also need to choose different sweepforwards scan angle for different dirts, for example, larger dirt need to be got larger sweepforward and scan angle θ.
Just introduce sweepforward and scan the variation tendency that the concept of angle can not at large be described out leading edge curve, therefore, introduce the concept of sweepforward angle; As shown in Figure 5, leading edge (6) is gone up to the sweepforward angle (β) that certain angle of a bit locating leading edge normal (13) and peripheral velocity (u) is defined as this point; The value of this sweepforward angle (β) locates to be limited in 45 degree within the scope of 60 degree in leading edge and front shroud tie point (8), in leading edge and wheel hub tie point (7), locate to be limited in 25 degree within the scope of 40 degree, the sweepforward angle of all the other each points smooth change between the two.
Because the number of blade of impeller is less, from structural strength, to consider, blade is thicker than general blade, so the actual thickness of blade (5) is 1.5 times to 3 times of general blade actual thickness; In whole impeller, leading edge is the most easily wound around, and the vane thickness that increases blade import can increase the area of contact of leading edge and dirt, effectively strengthen antiwind property, therefore the vane thickness that leading edge and front shroud tie point (8) are located is general impeller 1.5 times to 2 times, the vane thickness that leading edge and wheel hub tie point (7) are located is general impeller 2 times to 3 times.
For further strengthening the anti-winding ability of inlet's blade, leading edge is carried out to elliptic cavetto; As shown in Figure 6, be the aerofoil profile figure of blade inlet edge and wheel hub tie point place blade cavetto, as can be seen from the figure, its cavetto is partly semiellipse, oval major semi axis (r
1) and semi-minor axis (r
2) the span of ratio (δ) be 2 to 5; δ obtains excessive, and the area of contact of leading edge and dirt is too small, and fiber dirt is easily wound on it; δ obtains too small, can produce unnecessary hydraulic loss.
Due to the design of leading edge sweepforward, dirt can be mobile to place, axle center, antiwind in order to realize wheel hub, and wheel hub is carried out to cavetto.The wheel hub of general centrifugal pump is circular, and wheel hub end face (12) is general wheel hub as shown in Figure 3; Wheel hub in Fig. 3 is made to cross section a-a, and b-b and c-c show in Fig. 6; In Fig. 6, a-a and c-c be two blade inlet edges near the cross section of wheel hub, b-b is for by the wheel hub cross section of axis; The major semi axis of supposing the cross section of a-a and c-c is all r
1, the ratio of their major semi axis and semi-minor axis is δ
1, to the requirement of b-b, be: the major semi axis of b-b is got r
1, its δ and δ
1pass be δ=0.3～0.8 δ
1; So just make wheel hub completed to two interlobate smooth excessively, as shown in Figure 2; Because the cavetto of wheel hub is processed, this requirement has non-penetration type axis hole (10), and as shown in Figure 3, this axis hole adopts screw thread to install, and the choose axle and hole in the time of will guaranteeing axle rotation of hand of spiral screw trend.
Subtended angle of blade is got 150 degree to 200 degree, obtains too smallly, and blade acting ability diminishes, and obtains excessively, and it is too long and narrow that runner can become, and reduces passing capacity.
Impeller inlet runner face ovalize, at utmost guarantees that the particle of large particle diameter and fiber pass through smoothly on the one hand, also can effectively control runner diffusion simultaneously, thereby improves impeller hydraulic efficiency.
Claims (7)
1. one kind " anti-S " type Non-blinding pump impeller, it is characterized in that, comprise that impeller is provided with two blades (5), impeller is closed type structure, the leading edge of blade (6) is to periphery sweepforward, segment angle θ between leading edge and front shroud tie point (8) and described leading edge and wheel hub tie point (7), is arranged in the cylindrical-coordinate system on axis at initial point, gets 50 degree to 150 degree.
2. a kind of " anti-S " as claimed in claim 1 type Non-blinding pump impeller,, it is characterized in that, from importer to, if impeller turns counterclockwise, leading edge (6) is " anti-S " shape; Sweepforward angle (β) is defined as: above certain a bit locates the angle of leading edge normal (13) and peripheral velocity (u) to leading edge (6); The value of this sweepforward angle (β) locates to be limited in 45 degree within the scope of 60 degree in leading edge and front shroud tie point (8), in leading edge and wheel hub tie point (7), locate to be limited in 25 degree within the scope of 40 degree, the sweepforward angle of all the other each points smooth change between the two.
3. a kind of " anti-S " as claimed in claim 1 type Non-blinding pump impeller, it is characterized in that, the actual thickness of blade (5) is 1.5 times to 3 times of general blade actual thickness, wherein, the vane thickness that leading edge and front shroud tie point (8) are located is general impeller 1.5 times to 2 times, the vane thickness that leading edge and wheel hub tie point (7) are located is general impeller 2 times to 3 times.
4. a kind of " anti-S " as claimed in claim 1 type Non-blinding pump impeller, is characterized in that, blade inlet edge (6) carries out elliptic cavetto, oval major semi axis (r
1) and semi-minor axis (r
2) the span of ratio (δ) be 2 to 5.
5. a kind of " anti-S " as claimed in claim 1 type Non-blinding pump impeller, its feature is: wheel hub (4) is located to carry out elliptic cavetto, place, axle center is used half elliptic section (b-b) and wheel hub flange upper blade section (a-a, c-c) to be smoothly connected; The major semi axis of wherein supposing the cross section of a-a and c-c is all r
1, the ratio of their major semi axis and semi-minor axis is δ
1, to the requirement of b-b, be: the major semi axis of b-b is got r
1, its δ and δ
1pass be δ=0.3～0.8 δ
1.
6. a kind of " anti-S " as claimed in claim 1 type Non-blinding pump impeller, is characterized in that, blade (5) cornerite is that 150 degree are to 200 degree.
7. a kind of " anti-S " as claimed in claim 1 type Non-blinding pump impeller, is characterized in that, inlet channel cross section is oval, guarantees that large particle and large-diameter fiber and particle pass through smoothly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310687530.3A CN103671231B (en) | 2013-12-06 | 2013-12-06 | Inverted S-shaped blockage-free pump impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310687530.3A CN103671231B (en) | 2013-12-06 | 2013-12-06 | Inverted S-shaped blockage-free pump impeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103671231A true CN103671231A (en) | 2014-03-26 |
| CN103671231B CN103671231B (en) | 2017-01-11 |
Family
ID=50309765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310687530.3A Expired - Fee Related CN103671231B (en) | 2013-12-06 | 2013-12-06 | Inverted S-shaped blockage-free pump impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103671231B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107551342A (en) * | 2017-09-30 | 2018-01-09 | 北京安生生物技术有限责任公司 | A kind of receded disk impeller for reducing haemolysis and thrombus and occurring |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB365817A (en) * | 1931-02-05 | 1932-01-28 | Guy Howard Humphreys | Improvements in centrifugal pumps |
| CN1218148A (en) * | 1997-11-18 | 1999-06-02 | Itt制造企业公司 | Pump impeller |
| CN201368033Y (en) * | 2009-03-27 | 2009-12-23 | 东风汽车股份有限公司 | Double-reamer crushing type biogas slurry and residue pump |
| CN102011749A (en) * | 2010-12-23 | 2011-04-13 | 江苏国泉泵业制造有限公司 | Round head punched blade non-clogging impeller |
| CN102410247A (en) * | 2011-11-03 | 2012-04-11 | 江苏国泉泵业制造有限公司 | Method for designing impeller of double-flow crushing pump |
-
2013
- 2013-12-06 CN CN201310687530.3A patent/CN103671231B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB365817A (en) * | 1931-02-05 | 1932-01-28 | Guy Howard Humphreys | Improvements in centrifugal pumps |
| CN1218148A (en) * | 1997-11-18 | 1999-06-02 | Itt制造企业公司 | Pump impeller |
| CN201368033Y (en) * | 2009-03-27 | 2009-12-23 | 东风汽车股份有限公司 | Double-reamer crushing type biogas slurry and residue pump |
| CN102011749A (en) * | 2010-12-23 | 2011-04-13 | 江苏国泉泵业制造有限公司 | Round head punched blade non-clogging impeller |
| CN102410247A (en) * | 2011-11-03 | 2012-04-11 | 江苏国泉泵业制造有限公司 | Method for designing impeller of double-flow crushing pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107551342A (en) * | 2017-09-30 | 2018-01-09 | 北京安生生物技术有限责任公司 | A kind of receded disk impeller for reducing haemolysis and thrombus and occurring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103671231B (en) | 2017-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103185140B (en) | The radial direction bypass type groove end surface mechanical sealing structure of imitative pinion wing groove | |
| CN101598138A (en) | Secondary splitter blade type centrifugal impeller | |
| CN203756593U (en) | High-efficient centrifugal wind wheel | |
| CN104613001B (en) | Ecologically-friendly type axial flow pump structure for fishes to pass through | |
| CN103994096A (en) | Hydraulic design method of no-jam cyclone pump | |
| CN102506029A (en) | Impeller of centrifugal fan and centrifugal fan | |
| CN106762840A (en) | Half vane diffuser high and its method for designing of a kind of both sides arrangement | |
| CN102562651A (en) | High-efficiency wind-powered centrifugal pump impeller | |
| CN103256248B (en) | Impeller and comprise the centrifugal compressor of this impeller | |
| CN104005985A (en) | Multiple-blade blocking-free pump impeller and design method thereof | |
| CN201159202Y (en) | Moving blade tip winglet of compressor | |
| CN104896099A (en) | Gas lubrication cluster spiral groove end face mechanical sealing structure | |
| US11162472B2 (en) | Rotor blade | |
| CN103696982A (en) | Sewage axial-flow pump impeller structure capable of automatically cutting fibers | |
| CN103671231A (en) | Inverted S-shaped blockage-free pump impeller | |
| CN204099269U (en) | A kind of Multi-vane type Non-blinding pump impeller | |
| CN204739222U (en) | Gas lubrication helicla flute terminal surface mechanical seal structure tied in a bundle | |
| CN201547018U (en) | Rotating blade row layout of axial compressor | |
| CN103615392A (en) | Uniform-screw-pitch pulp pump and impeller hydraulic design method of uniform-screw-pitch pulp pump | |
| CN203285989U (en) | Radial shunting type groove end face mechanical sealing structure simulating bird wing groove | |
| CN112628191B (en) | Axial flow pump for inhibiting radial flow of swept blades | |
| CN103047174B (en) | Design method of efficient low-cavitation overload-free centrifugal pump impeller | |
| CN202946441U (en) | Impeller structure of centrifugal pump | |
| CN208294833U (en) | Centrifugal pump impeller | |
| CN203627241U (en) | Uniform pitch pulp pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170111 Termination date: 20171206 |