CN101825089B - Free flow impeller with cutting edges - Google Patents
Free flow impeller with cutting edges Download PDFInfo
- Publication number
- CN101825089B CN101825089B CN201010128548.6A CN201010128548A CN101825089B CN 101825089 B CN101825089 B CN 101825089B CN 201010128548 A CN201010128548 A CN 201010128548A CN 101825089 B CN101825089 B CN 101825089B
- Authority
- CN
- China
- Prior art keywords
- cutting edge
- blade
- centrifugal pump
- free flow
- shaped portion
- 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.)
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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
- 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
- F04D7/045—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 with means for comminuting, mixing stirring or otherwise treating
-
- 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
- F04D29/2238—Special flow patterns
- F04D29/2244—Free vortex
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a centrifugal pump for conveying medium mixed with solid mixtures. A free flow impeller (2) is arranged in the casing (1). non-blade space (9) is formed between the free flow impeller (2) and a casing wall (8) at an inlet side. Blades (7) are formed on a support tray (6) of the free flow impeller (2). Blades (7) comprise lateral faces (13) of the pressed side, lateral faces (11) of the suction side, and frontal faces (12). According to the invention, the blades (7) are provided with cutting edges (14).
Description
Technical field
The present invention relates to a kind of centrifugal pump (Kreiselpumpe), for delivery of the medium that is mixed with solid mixture, there is housing, in this housing, be provided with free flow impeller (Freistromrad), between free flow impeller and the shell body wall of inlet side, form vaneless space, wherein free flow impeller comprises supporting disk, forms blade on supporting disk, and these blades have the side of compression-side, side and the front of suction side.
Background technique
With regard to having the pump of free flow impeller, the distance between impeller blade and the shell body wall of inlet side is larger, has formed thus a free space.So can realize, carry solid-state mixture, even if the size of mixture is larger.
Impeller is by radially interior to the swash of wave.Fluid flows away from impeller radially outward.In space between impeller and inlet side shell body wall, form radially inner flowing.Therefore the mixture that density was substantially equal to or was less than the averag density that is transferred liquid is deposited on impeller center.If described mixture is fiber or dry goods mixture, will produce because sedimental danger appears in overstand in the region at impeller center.This can cause pump to stop up.Therefore, Free-flow pump has been carried out to a variety of designs, be equipped with smashing device to these Free-flow pumps.
In DE 10305726A1, recorded a kind of centrifugal pump, it was provided with for being transferred the smashing device of mixture fiber or block of liquid before pump impeller.This smashing device consists of the cutting head rotating along with pump impeller and the cutting ring that is arranged on still in centrifugal pump casing.But owing to being front equipped with smashing device, impeller space before being reduced, and make the swash of wave of impeller be affected.This can have a negative impact to pump curve.
Summary of the invention
The object of the invention is to, the centrifugal pump of the liquid for delivery of containing solid mixture is improved, make to avoid to stop up.The fiber mixture for example suspension of fabric or film is deserved to prevent.In this case, can not hinder and freely pass through pump.In addition, can not produce adverse influence to pump curve.
According to the present invention, the implementation of this object is, to blade, is provided with cutting edge.The blade that is provided with cutting edge cuts off solid-state mixture, thereby there will not be deposition.At this particularly advantageously, all blades or a plurality of blade are provided with cutting edge.But under individual cases, be only provided with cutting edge to a blade just enough.
According to of the present invention preferred embodiment a kind of, the forming part of cutting edge is positioned at the contacting point of face of blade and side.
Impeller is foundry goods normally.With regard to traditional Free-flow pump, the contact position at face of blade and the place of being in contact with one another, side does not have sharp limit.Between front and side, there is no the Line of contact of regulation, but have the formed region of the mutual transition of these faces.In this case, described region is not the watershed area with sharp edge, but the transition zone of rounding.
Contrary with traditional blade, according to the present invention, at least one face of blade is processed, make to form cutting edge in the contact position of these faces.In order to form cutting edge, can to these faces, process by grinding or plane turning.Can also be by the localized quench hardening of cutting edge being improved to cutting effect and wear-resistant property (Verschlei β verhalten).
According to a kind of particularly advantageous mode of execution of the present invention, in order to form cutting edge, the front of blade is processed.Described positive through the processing of grinding peace facing
thereby, produce cutting edge.Blade side is formed by casting surface (Gusshaut).
In order to process whole plane, be only provided with chamfered edge can to face of blade.Here, the preferred chamfered edge region of face of blade is the contacting point of the side of face of blade and compression-side.The roughening of foundry goods contributes to improve the cutting of cutting edge or cuts off effect.Hard casting surface can also resistance to wear.
The mutual angle of face that forms cutting edge is preferably less than 120 °.At this, shown advantageously, the mutual angle of face that forms cutting edge is less than 90 °.
According to a kind of particularly advantageous mode of execution of the present invention, cutting edge forms at the positive Line of contact place contacting with the side of compression-side.Realize thus the cutting effect especially efficiently of cutting edge, because mixture is because the sense of rotation of impeller presses against on the side of compression-side.
According to a kind of favourable mode of execution of the present invention, face of blade is configured to the little airfoil-shaped portion with side overlap joint.Little airfoil-shaped portion is in most cases perpendicular to the additional facet of blade.By little airfoil-shaped portion, can improve the efficiency of pump.Little airfoil-shaped portion preferably protrudes from the side of the suction side of blade.
Shown usefully especially, little airfoil-shaped portion is provided with cutting edge.The impeller with little airfoil-shaped portion can be realized its optimum performance in the situation that blade angle is very little.This has catered to cutting effect.In addition, little airfoil-shaped portion provides additional face, and firm (stabil) cutting edge can be set on described additional facet.
According to a kind of favourable design of the present invention, on little airfoil-shaped portion, be fixed with blade (Klinge).Described blade is the lamellule that is provided with cutting edge.These blades are preferably screwed on little airfoil-shaped portion.
Another kind according to the present invention preferably designs, and little airfoil-shaped portion is provided with groove.These grooves are offered on the surface of the inlet side of little airfoil-shaped portion.By these grooves, on the surface of the inlet side of little airfoil-shaped portion, produce cutting edge.The Line of contact place that cutting edge contacts with the surface of little airfoil-shaped portion at trenched side-wall produces.In order to form groove, be provided with turning part (Eindrehung) can to the plane of little airfoil-shaped portion.The turning part of incision-like can rounded or spirality.The cross section of groove is preferably wedge shape.
According to of the present invention preferred embodiment a kind of, blade prolongation protrudes from the face of little airfoil-shaped portion.Described blade prolongation is towards the shell body wall of inlet side.Can carry out finish turning or fine ginding to these blade prolongations, thereby form in this way cutting edge.Pass through induction hardening
can additionally make these cutting edges become firm.
With regard to centrifugal pump of the present invention, blade preferably has the blade angle β of mild outlet side.Equally shown usefully, impeller has a small amount of blade, has wherein shown usefully, and the quantity of blade is four or still less.The impeller with mild blade angle and a small amount of blade is useful especially, because fiber radially outward slides, simultaneously by fragmentation.The free flow impeller with precipitous blade angle and a large amount of blades is also inapplicable, because be difficult to slide against sense of rotation.
Accompanying drawing explanation
By obtaining other features and advantages of the present invention to embodiment's explanation, the description of the drawings and accompanying drawing itself.Shown in figure:
Fig. 1 is the sectional view of Free-flow pump;
Fig. 2 illustrates the positive free flow impeller with little airfoil-shaped portion and chamfered edge, wherein
A.) being sectional view, is b.) plan view, is c.) stereogram;
Fig. 3 illustrates the free flow impeller with little airfoil-shaped portion and circular groove, wherein
A.) being sectional view, is b.) plan view, is c.) stereogram;
Fig. 4 illustrates the free flow impeller with little airfoil-shaped portion and spiral groove, wherein
A.) being sectional view, is b.) plan view, is c.) stereogram.
Embodiment
A kind of centrifugal pump shown in Fig. 1, free flow impeller 2 is arranged in the housing 1 of this centrifugal pump.Free flow impeller 2 is fixed on axle 3.Hub body 4 is for fixing free flow impeller 2, and screw 5 is inserted in this hub body.On the supporting disk 6 of free flow impeller 2, be provided with a plurality of blades 7.Between the shell body wall 8 of free flow impeller 2 and inlet side, form vaneless space 9.
The free flow impeller 2 with cutting edge 14 shown in Figure 2.Free flow impeller 2 is rotated counterclockwise.On supporting disk 6, be provided with blade 7.On the end of the inlet side of blade 7, form little airfoil-shaped portion 10.These little airfoil-shaped portions 10 protrude from the side 11 of the suction side of blade 7.The front 12 of blade 7 has the chamfered edge towards the side 13 of compression-side.Line of contact place between front 12 and the side 13 of compression-side, forms cutting edge 14.In Fig. 2 b, can see the blade angle β of outlet side.
In Fig. 3 and 4, on little airfoil-shaped portion 10, offer groove 15.Groove 15 is lip-deep recessed at the inlet side of little airfoil-shaped portion 10.These grooves 15 can be on the surface of little airfoil-shaped portion be offered with the form of the otch screwing in.The cross section of groove 15 is preferably wedge shape.Owing to offering groove 15 on little airfoil-shaped portion 10, on the surface of the inlet side of little airfoil-shaped portion 10, form cutting edge 14.The Line of contact place of these cutting edges 14 between the sidewall 16 of groove 15 and the surface of the inlet side of little airfoil-shaped portion 10 produces.In Fig. 3, groove 15 is rounded.In Fig. 4, groove 15 twist.
Claims (9)
1. a centrifugal pump, for delivery of the medium that is mixed with solid mixture, there is housing (1), in this housing, be provided with free flow impeller (2), between the shell body wall (8) of free flow impeller (2) and inlet side, form vaneless space (9), wherein free flow impeller (2) comprises supporting disk (6), on supporting disk, form blade (7), these blades have the side (13) of compression-side, the side (11) of suction side and positive (12), it is characterized in that, blade (7) is provided with cutting edge (14), wherein the forming part of cutting edge (14) is positioned at the Line of contact place that front (12) contacts with the side (13) of compression-side.
2. centrifugal pump as claimed in claim 1, is characterized in that, cutting edge (14) is by forming the fine ginding of positive (12).
3. centrifugal pump as claimed in claim 1, is characterized in that, cutting edge (14) is by forming the finish turning of positive (12).
4. centrifugal pump as claimed in claim 1, it is characterized in that, cutting edge (14) is processed and is formed by the chamfered edge to the front of blade (7) (12), and wherein the region of the processing that is chamfered of positive (12) is positioned at the contacting point of the side (13) of front (12) and compression-side.
5. centrifugal pump as claimed in claim 1, is characterized in that, the mutual angle of face (12,13) that forms cutting edge (14) is less than 120 °.
6. centrifugal pump as claimed in claim 5, is characterized in that, the mutual angle of face (12,13) that forms cutting edge (14) is less than 90 °.
7. centrifugal pump as claimed in claim 1, is characterized in that, the front (12) of blade (7) is configured to little airfoil-shaped portion (10), and these little airfoil-shaped portions protrude from the side (11) of the suction side of blade (7).
8. centrifugal pump as claimed in claim 7, is characterized in that, on little airfoil-shaped portion (10), is fixed with the blade with cutting edge (14).
9. centrifugal pump as claimed in claim 7, is characterized in that, little airfoil-shaped portion (10) is provided with groove (15), forms cutting edge (14) by these grooves (15) on the surface of the inlet side of little airfoil-shaped portion (10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009011444.0 | 2009-03-03 | ||
| DE102009011444A DE102009011444A1 (en) | 2009-03-03 | 2009-03-03 | Free-flow impeller with cutting edges |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101825089A CN101825089A (en) | 2010-09-08 |
| CN101825089B true CN101825089B (en) | 2014-08-13 |
Family
ID=42112002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010128548.6A Active CN101825089B (en) | 2009-03-03 | 2010-03-03 | Free flow impeller with cutting edges |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2226505B1 (en) |
| CN (1) | CN101825089B (en) |
| DE (1) | DE102009011444A1 (en) |
| DK (1) | DK2226505T3 (en) |
| ES (1) | ES2443550T3 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010042513A1 (en) * | 2010-10-15 | 2012-04-19 | BSH Bosch und Siemens Hausgeräte GmbH | Pump for a household appliance, household appliance with a pump and method for operating a domestic appliance |
| ITMI20130608A1 (en) * | 2013-04-12 | 2014-10-13 | Pompe Rotomec S R L | IMPELLER FOR ANTI-CLOGGING AND HIGH HYDRAULIC PERFORMANCE PUMPS |
| EP2868928A1 (en) * | 2013-10-31 | 2015-05-06 | Sulzer Pumpen Ag | A centrifugal pump and a method of pumping a medium |
| DE102015212653B4 (en) * | 2015-07-07 | 2022-03-17 | BSH Hausgeräte GmbH | HOUSEHOLD APPLIANCE |
| CN105927581A (en) * | 2016-06-29 | 2016-09-07 | 新界泵业集团股份有限公司 | Cutting type impeller suitable for submersible electric pump |
| DE102016225908A1 (en) | 2016-12-21 | 2018-06-21 | KSB SE & Co. KGaA | Vortex pump |
| IT201900010632A1 (en) * | 2019-07-02 | 2021-01-02 | Dab Pumps Spa | IMPELLER PERFECTED FOR CENTRIFUGAL PUMP, ESPECIALLY FOR PUMP WITH RETRACTABLE IMPELLER TYPE, AND PUMP WITH A SIMILAR IMPELLER |
| CN114151380B (en) * | 2021-11-15 | 2024-01-09 | 中交疏浚技术装备国家工程研究中心有限公司 | Antiwind swirl pump with clearance bath |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3692422A (en) * | 1971-01-18 | 1972-09-19 | Pierre Mengin Ets | Shearing pump |
| EP1303703B1 (en) * | 2000-07-25 | 2005-07-27 | Société Etex de Recherches Techniques, S.E.R.T. | Sanitary shredder |
| CN1922403A (en) * | 2004-02-16 | 2007-02-28 | 威乐股份公司 | Cutting tool pertaining to a centrifugal pump |
| CN101061319A (en) * | 2004-11-19 | 2007-10-24 | Itt制造企业公司 | Impeller wheel |
| CN101076668A (en) * | 2004-12-03 | 2007-11-21 | K.H.布林克曼泵两合有限公司 | Pump with cutting impeller |
| CN101142411A (en) * | 2005-03-24 | 2008-03-12 | 布林克曼泵业K.H.布林克曼两合公司 | Pump with cutting impeller and pre-chopper |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4076179A (en) * | 1976-04-22 | 1978-02-28 | Kabushiki Kaisha Sogo Pump Seisakusho | Centrifugal sewage pump |
| JPS55117094A (en) * | 1979-03-01 | 1980-09-09 | Kawamoto Seisakusho:Kk | Pump with cutter |
| FI75652C (en) * | 1984-08-16 | 1988-07-11 | Sarlin Ab Oy E | Impeller at a pump, especially at an eddy current pump. |
| JPH1193884A (en) * | 1997-09-22 | 1999-04-06 | Ebara Corp | Manufacture of vortex type pump |
| DE10305726A1 (en) | 2002-03-14 | 2003-10-02 | Ksb Ag | Centrifugal pump with shredding device |
| US20040234370A1 (en) * | 2002-09-26 | 2004-11-25 | Mark Simakaski | Chopping pump impeller assembly |
| DE10301629B4 (en) * | 2003-01-17 | 2013-05-29 | Ksb Aktiengesellschaft | Vortex pump |
| JP2009293547A (en) * | 2008-06-06 | 2009-12-17 | Shinmaywa Industries Ltd | Impeller and vortex pump |
-
2009
- 2009-03-03 DE DE102009011444A patent/DE102009011444A1/en not_active Withdrawn
-
2010
- 2010-02-12 ES ES10001468.7T patent/ES2443550T3/en active Active
- 2010-02-12 EP EP10001468.7A patent/EP2226505B1/en active Active
- 2010-02-12 DK DK10001468.7T patent/DK2226505T3/en active
- 2010-03-03 CN CN201010128548.6A patent/CN101825089B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3692422A (en) * | 1971-01-18 | 1972-09-19 | Pierre Mengin Ets | Shearing pump |
| EP1303703B1 (en) * | 2000-07-25 | 2005-07-27 | Société Etex de Recherches Techniques, S.E.R.T. | Sanitary shredder |
| CN1922403A (en) * | 2004-02-16 | 2007-02-28 | 威乐股份公司 | Cutting tool pertaining to a centrifugal pump |
| CN101061319A (en) * | 2004-11-19 | 2007-10-24 | Itt制造企业公司 | Impeller wheel |
| CN101076668A (en) * | 2004-12-03 | 2007-11-21 | K.H.布林克曼泵两合有限公司 | Pump with cutting impeller |
| CN101142411A (en) * | 2005-03-24 | 2008-03-12 | 布林克曼泵业K.H.布林克曼两合公司 | Pump with cutting impeller and pre-chopper |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102009011444A1 (en) | 2010-09-09 |
| DK2226505T3 (en) | 2014-01-27 |
| CN101825089A (en) | 2010-09-08 |
| EP2226505A1 (en) | 2010-09-08 |
| EP2226505B1 (en) | 2013-11-27 |
| ES2443550T3 (en) | 2014-02-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |