EP0750119B1 - Pumpenlaufrad - Google Patents
Pumpenlaufrad Download PDFInfo
- Publication number
- EP0750119B1 EP0750119B1 EP95117565A EP95117565A EP0750119B1 EP 0750119 B1 EP0750119 B1 EP 0750119B1 EP 95117565 A EP95117565 A EP 95117565A EP 95117565 A EP95117565 A EP 95117565A EP 0750119 B1 EP0750119 B1 EP 0750119B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- pump
- blade
- thickening
- starting zone
- 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.)
- Expired - Lifetime
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
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2238—Special flow patterns
- F04D29/225—Channel wheels, e.g. one blade or one flow channel
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
Definitions
- the invention relates to a pump impeller Radial centrifugal pump in particular with a submersible pump two curved blades attached to one of the impeller hub nearby disc are firm, with the two on the suction side Buckets protrude freely into the pump room without touching one another impeller disc to be firm (half-open Wheel).
- the impeller is known for clog-free pumps to do with a single shovel.
- Such single-bladed impellers have a lower one Efficiency and lead to a so-called hydrodynamic imbalance caused by the asymmetrical Passing the only shovel past the discharge nozzle arises.
- the mechanical unbalance is added to the hydrodynamic imbalance, it being known the mechanical imbalance due to an asymmetrical distribution counteracting the masses in the impeller.
- Impellers such as those from US 1959710 and US 1846834 are known. not given. This Impellers are more likely to clog the Pump especially for waste water with material residues such as a rag. A rag can spread over both blades place and get stuck on both blades.
- the object of the invention is simple construction the freedom from blockage of a radial centrifugal pump to improve the type mentioned at the beginning.
- the impeller according to the invention thus pays for itself Two-bladed not with increased Risk of constipation, but this calm working Impeller is similar to low clogging as a single-bladed.
- the thickening the starting area of the first blade on the Side of the blade facing away from the impeller axis is.
- the thickening should also be in the front curve over the front edge of the bucket.
- the unbalance is reduced by that the unbalance caused by the thickening through a reduction in mass on the same side of the impeller or through a mass increase on the opposite Impeller side is lifted. It is also an advantage if the impeller is made of plastic.
- the impeller 1 of a radial centrifugal pump which as Submersible pump can be used, has a circular Disc 2, on the back of which a hub 3 coaxially is molded, in which a socket 4 is cast can to the impeller on the shaft of an electric motor fasten.
- blades on the front of disc 2 5, 6 in front which protrude freely into the pump chamber, so that it is a half-open impeller.
- the blades 5 and 6 are opposite each other in a rotationally symmetrical manner molded on the plastic disc 2 and taper in its thickness D towards the pump inlet side.
- the impeller shown in Figure 1 rotates in Direction of arrow 7 so that the blade leading edges 5a and 6a first on the liquid to be pumped to meet. These leading edge of the bucket are together with an adjoining area as Blade beginning areas 5b, 6b. While the two outside the blade start areas 5b, 6b Blades 5, 6 are identical, there is a Difference in these blade start areas:
- the thickness D1 is the Blade start area 5b larger than the thickness D2 of the Blade start area 6b, the second blade 6.
- the exemplary embodiment is the additional thickening of the Initial area 5b of the first blade 5 on the Shaped impeller axis 8 facing away from the blade.
- the thickness D 1 is only slightly larger than the thickness D2 (0.1-4mm or 5-40% larger than D2) is the effect for greater freedom from constipation.
- the length of the thickened blade start area 5b is 1/20 to 1/4 of the total length of the first blade 5.
- the thickening goes in at the blade leading edge 5a their rounding so that the first blade 5 is shaped as aerodynamically as the second Bucket 6.
- the unbalance caused by the thickening balance, the impeller has on the side of the 5th a mass reduction or on the opposite Side a mass increase.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
- Figur 1:
- Eine Draufsicht auf das Laufrad in Ansaugrichtung und
- Figur 2:
- einen Schnitt durch das Laufrad nach A-D in Figur 1.
Claims (5)
- Pumpenlaufrad (1) einer Radialkreiselpumpe insbesondere einer Tauchmotorpumpe mit zwei gekrümmten Schaufeln (5, 6), die an einer der Laufradnabe (3) nahen Scheibe fest sind, wobei an der Saugseite die beiden Schaufeln frei in den Pumpenraum ragen, ohne an einer weiteren Laufradscheibe fest zu sein, dadurch gekennzeichnet, daß der auf die Flüssigkeit zuerst auftreffende verdickte Schaufelanfangsbereich (5b) der ersten Schaufel (5) eine größere Dicke (D1) aufweist als der Anfangsbereich der zweiten Schaufel (6), wobei die Länge des verdickten Schaufelanfangsbereiches (5b) 1/20 bis 1/4 der Gesamtlänge der ersten Schaufel (5) beträgt.
- Pumpenlaufrad nach Anspruch 1, dadurch gekennzeichnet, daß die Verdickung (V) des Anfangsbereiches (5b) der ersten Schaufel (5) auf der der Laufradachse (8) abgewandten Seite der Schaufel angeordnet ist.
- Pumpenlaufrad nach Anspruch 1, dadurch gekennzeichnet, daß die Verdickung (V) in die vordere Rundung der Schaufelvorderkante (5a) übergeht.
- Pumpenlaufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die durch die Verdickung (V) erzeugte Unwucht durch eine Massenverringerung auf derselben Laufradseite oder durch eine Massenerhöhung auf der gegenüberliegenden Laufradseite aufgehoben ist.
- Pumpenlaufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß das Laufrad (1) aus Kunststoff ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19521768 | 1995-06-19 | ||
DE19521768A DE19521768A1 (de) | 1995-06-19 | 1995-06-19 | Pumpenlaufrad |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0750119A1 EP0750119A1 (de) | 1996-12-27 |
EP0750119B1 true EP0750119B1 (de) | 2000-05-10 |
Family
ID=7764431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95117565A Expired - Lifetime EP0750119B1 (de) | 1995-06-19 | 1995-11-08 | Pumpenlaufrad |
Country Status (3)
Country | Link |
---|---|
US (1) | US5692880A (de) |
EP (1) | EP0750119B1 (de) |
DE (2) | DE19521768A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2195733B1 (es) * | 2001-07-20 | 2005-08-16 | Fagor, S.Coop. | Bomba hidraulica con guiador de flujo. |
US6979174B2 (en) * | 2003-10-01 | 2005-12-27 | Schlumberger Technology Corporation | Stage pump having composite components |
JP4554189B2 (ja) * | 2003-11-26 | 2010-09-29 | 株式会社エンプラス | 遠心式羽根車 |
US7544042B2 (en) * | 2006-01-03 | 2009-06-09 | Emerson Electric Co. | Insert with sleeve for a molded impeller |
DE102011007907B3 (de) * | 2011-04-21 | 2012-06-21 | Ksb Aktiengesellschaft | Laufrad für Kreiselpumpen |
EP2888484B1 (de) * | 2012-08-23 | 2021-02-17 | Sulzer Management AG | Pumpe zum fördern von abwasser sowie laufrad und bodenplatte für eine solche |
CN103216452B (zh) * | 2013-04-25 | 2016-05-11 | 常州雷利电机科技有限公司 | 排水泵 |
JP6488167B2 (ja) * | 2015-03-27 | 2019-03-20 | 株式会社荏原製作所 | 渦巻ポンプ |
AU201614369S (en) * | 2016-08-12 | 2016-10-27 | Weir Minerals Australia Ltd | Impeller |
USD810788S1 (en) * | 2016-08-25 | 2018-02-20 | Weir Minerals Australia Ltd. | Pump impeller |
USD810789S1 (en) * | 2016-08-25 | 2018-02-20 | Weir Minerals Australia Ltd. | Pump impeller |
DE102017221930A1 (de) * | 2017-12-05 | 2019-06-06 | KSB SE & Co. KGaA | Laufrad für Abwasserpumpe |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US553956A (en) * | 1896-02-04 | Explosive valve for blast-furnaces | ||
US1754992A (en) * | 1926-12-06 | 1930-04-15 | American Well Works | Centrifugal pump |
US1864834A (en) * | 1927-12-28 | 1932-06-28 | Buffalo Steam Pump Company | Centrifugal pump impeller |
US1959710A (en) * | 1931-09-21 | 1934-05-22 | Chicago Pump Co | Pump |
US2265758A (en) * | 1940-05-29 | 1941-12-09 | Buffalo Pumps Inc | Pump |
US4063849A (en) * | 1975-02-12 | 1977-12-20 | Modianos Doan D | Non-clogging, centrifugal, coaxial discharge pump |
US4087994A (en) * | 1976-09-07 | 1978-05-09 | The Maytag Company | Centrifugal pump with means for precluding airlock |
IT8022473A0 (it) * | 1979-06-22 | 1980-05-30 | Klein Schanzlin & Becker Ag | Girante aperta per pompe centrifughe. |
US4293280A (en) * | 1980-08-27 | 1981-10-06 | The United States Of America As Represented By The Secretary Of The Navy | Transcavitating propeller |
US4681508A (en) * | 1984-11-14 | 1987-07-21 | Kim Choong W | Supercavitation centrifugal pump |
JPS61252893A (ja) * | 1985-05-02 | 1986-11-10 | Hitachi Ltd | 汚水汚物ポンプ |
DE4328396A1 (de) * | 1993-08-24 | 1995-03-02 | Klein Schanzlin & Becker Ag | Einschaufelrad für Kreiselpumpen |
-
1995
- 1995-06-19 DE DE19521768A patent/DE19521768A1/de not_active Withdrawn
- 1995-11-08 EP EP95117565A patent/EP0750119B1/de not_active Expired - Lifetime
- 1995-11-08 DE DE59508322T patent/DE59508322D1/de not_active Expired - Lifetime
-
1996
- 1996-06-13 US US08/662,945 patent/US5692880A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0750119A1 (de) | 1996-12-27 |
US5692880A (en) | 1997-12-02 |
DE19521768A1 (de) | 1997-01-02 |
DE59508322D1 (de) | 2000-06-15 |
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