EP0244844A2 - Channel impeller for centrifugal pumps - Google Patents

Channel impeller for centrifugal pumps Download PDF

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Publication number
EP0244844A2
EP0244844A2 EP87106548A EP87106548A EP0244844A2 EP 0244844 A2 EP0244844 A2 EP 0244844A2 EP 87106548 A EP87106548 A EP 87106548A EP 87106548 A EP87106548 A EP 87106548A EP 0244844 A2 EP0244844 A2 EP 0244844A2
Authority
EP
European Patent Office
Prior art keywords
base body
channel wheel
channel
wheel according
insert
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
Application number
EP87106548A
Other languages
German (de)
French (fr)
Other versions
EP0244844B1 (en
EP0244844A3 (en
Inventor
Rolf Witzel
Siegfried Kleindienst
Salvatore Scianna
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KSB AG
Original Assignee
KSB AG
Klein Schanzlin and Becker AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KSB AG, Klein Schanzlin and Becker AG filed Critical KSB AG
Priority to AT87106548T priority Critical patent/ATE65300T1/en
Publication of EP0244844A2 publication Critical patent/EP0244844A2/en
Publication of EP0244844A3 publication Critical patent/EP0244844A3/en
Application granted granted Critical
Publication of EP0244844B1 publication Critical patent/EP0244844B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

Definitions

  • Channel wheels for centrifugal pumps are used primarily to promote with solid admixtures penetrate liquids, e.g. for pumping domestic wastewater and faeces. They are used in open and closed form, as single and multi-channel wheels.
  • the type of production and the fact that the channels are sometimes difficult to access for post-processing results in a comparatively poor surface quality of the conveyor channels.
  • the invention has for its object to provide a channel wheel for centrifugal pumps, which has a high usability with simple manufacture and workability.
  • the invention solves this problem by means of a channel wheel, which is formed by a base body comprising a pressure-side cover disk and a hub body and one or more flow-guiding insert bodies attached to the base body.
  • the insert bodies are manufactured independently of the base body to be connected to the shaft of the centrifugal pump, they can be made of a much lighter material than is the case with the cast casters to date. This results in lower circumferential inertia forces and easier balancing, which has a particularly favorable effect in the case of single-channel wheels.
  • the separate production can also be used for further material savings, since the arrangement of cavities can be realized much easier here.
  • the interchangeability of the insert bodies to be manufactured with a high surface quality allows a simple performance adjustment.
  • the main components of the single-channel wheel shown in the drawing are a base body (1) and an insert body (2). While the insert body (2) consists of a one-piece plastic part, the base body (1) is made of several parts that are connected by welding: A pressure-side cover disk (3) is connected to a hub body (4) that is used to attach the single-channel wheel a centrifugal pump shaft, not shown.
  • the pressure-side cover plate (3) like a suction-side cover plate (5) and its suction mouth (6) and a web (7) connecting the cover plates (3 and 5), are made of sheet steel.
  • the insert body (2) is inserted radially from the outside into the base body (1) and placed on the web (7).
  • the base body (1) and the insert body (2) are also fixed in their position relative to one another by means of the fastening of the single-channel wheel on the centrifugal pump shaft by means of screwing.
  • the base body (1) can also consist of a metallic casting or of plastic.
  • the flow-carrying insert body (2) which is connected to the base body (1) by screwing, clamping, welding, riveting or gluing, can also be formed from sheet metal, cast or made from a ceramic material. Depending on requirements, its contour can end inside, outside or with the base body (1).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

The channel impeller for centrifugal pumps according to the invention which is formed by a basic structure comprising a cover plate on the pressure side and a hub body and one or more flow-guiding insert elements fixed to the basic structure possesses considerable advantages over the channel impellers cast in one piece, these advantages deriving primarily from the facility for separate manufacture and machining of the supporting basic structure (1) and the flow-guiding insert element (2). <IMAGE>

Description

Kanalräder für Kreiselpumpen, wie sie unter anderem durch die DE-PS 10 34 031, die DE-PS 11 96 506, die US-PS 17 54 992 und die DE-OS 30 15 188 bekannt sind, dienen vor allem zur Förderung von mit festen Beimengungen durchsetzten Flüssigkeiten, also beispielsweise zum Pumpen von häuslichem Abwasser und Fäkalien. Sie finden in offener und geschlossener Form, als Ein- und Mehrkanalräder Verwendung. Die bei den Kanalrädern, und hier insbesondere den Einkanalrädern wegen der Notwendigkeit großer Durchgänge und dadurch bedingter besonderer Schaufelgestaltungen unvermeidlichen Materialanhäufungen in oft unsymmetrischer Aufteilung bringen große umlaufende Massenkräfte und erhebliche Schwierigkeiten bei der Auswuchtung der Kanalräder mit sich. Vor allem bei geschlossenen Kanalrädern ergeben sich außerdem Schwierigkeiten in der Gestaltung und Fertigung der bisher durch Gießen hergestellten Laufräder. Aus der Art der Fertigung und dem Umstand, daß die Kanäle für eine Nachbearbeitung teilweise nur schwer zugänglich sind, ergibt sich eine vergleichsweise schlechte Oberflächen­güte der Förderkanäle.Channel wheels for centrifugal pumps, as are known, inter alia, from DE-PS 10 34 031, DE-PS 11 96 506, US-PS 17 54 992 and DE-OS 30 15 188, are used primarily to promote with solid admixtures penetrate liquids, e.g. for pumping domestic wastewater and faeces. They are used in open and closed form, as single and multi-channel wheels. The inevitable accumulations of material in the channel wheels, and here in particular the single channel wheels, because of the need for large passages and the resulting special blade designs, often in an asymmetrical distribution, result in large circumferential inertia forces and considerable difficulties in balancing the channel wheels. Especially with closed channel impellers, difficulties also arise in the design and manufacture of the impellers previously produced by casting. The type of production and the fact that the channels are sometimes difficult to access for post-processing results in a comparatively poor surface quality of the conveyor channels.

Der Erfindung liegt die Aufgabe zugrunde, ein Kanalrad für Kreiselpumpen zu schaffen, welches bei einfacher Herstell- und Bearbeitbarkeit eine hohe Einsatztauglichkeit besitzt. Die Erfindung löst diese Aufgabe mittels eines Kanalrades, welches gebildet wird durch einen eine druckseitige Deckscheibe und einen Nabenkörper umfassenden Grundkörper und einen oder mehrere am Grundkörper befestigte strömungs­führende Einsatzkörper.The invention has for its object to provide a channel wheel for centrifugal pumps, which has a high usability with simple manufacture and workability. The invention solves this problem by means of a channel wheel, which is formed by a base body comprising a pressure-side cover disk and a hub body and one or more flow-guiding insert bodies attached to the base body.

Die Unteransprüche nennen zweckmäßige Ausgestaltungen des erfindungsgemäßen Kanalrades.The subclaims name expedient embodiments of the channel wheel according to the invention.

Durch die Aufteilung des erfindungsgemäßen Kanalrades in einen Grundkörper und einen oder mehrere strömungsführende Einsatzkörper ergeben sich aufgrund der nun getrennten Herstellung dieser Teile mehrere wichtige Vorteile:By dividing the channel wheel according to the invention into a base body and one or more flow-carrying insert bodies, there are several important advantages due to the now separate manufacture of these parts:

Da die strömungsführenden Teile, die Einsatzkörper, unabhängig von dem mit der Welle der Kreiselpumpe zu verbindenden Grundkörper gefertigt werden, können sie aus einem wesentlich leichteren Material bestehen als es bei den bisherigen gegossenen Laufrädern der Fall ist. Es ergeben sich also geringere umlaufende Massenkräfte und ein leichteres Auswuchten, was sich insbesondere bei Einkanalrädern sehr günstig auswirkt. Die getrennte Fertigung kann aber auch für weitere Materialeinsparungen genutzt werden, da sich hier die Anordnung von Hohlräumen wesentlich einfacher verwirklichen läßt. Die Austauschbarkeit der mit hoher Oberflächengüte zu fertigenden Einsatzkörper erlaubt dabei eine einfache Leistungsanpassung.Since the flow-carrying parts, the insert bodies, are manufactured independently of the base body to be connected to the shaft of the centrifugal pump, they can be made of a much lighter material than is the case with the cast casters to date. This results in lower circumferential inertia forces and easier balancing, which has a particularly favorable effect in the case of single-channel wheels. The separate production can also be used for further material savings, since the arrangement of cavities can be realized much easier here. The interchangeability of the insert bodies to be manufactured with a high surface quality allows a simple performance adjustment.

Vor allem aber ergeben sich insgesamt bessere Möglichkeiten der Gestaltung des strömungsführenden Durchgangs. Es können sehr kleine Austrittswinkel verwirklicht werden. Es wird ein relativ großer Umschlingungswinkel möglich, woraus sich wiederum eine sehr steile Kennlinie und ein guter Wirkungsgrad ergibt.Above all, however, there are overall better options for designing the flow-conducting passage. Very small exit angles can be achieved. A relatively large wrap angle is possible, which in turn results in a very steep characteristic curve and good efficiency.

Bleibt noch zu erwähnen, daß für die Herstellung des erfindungsgemäßen Kanalrades keine oder nur geringe Modellkosten zu veranschlagen sind.It remains to be mentioned that no or only low model costs can be estimated for the manufacture of the sewer wheel according to the invention.

Anhand eines Ausführungsbeispiels wird die Erfindung näher erläutert. Die Zeichnung zeigt in

  • Fig. 1 ein erfindungsgemäß gestaltetes Einkanalrad in Schnittdarstellung, in
  • Fig. 2 die Vorderansicht des Einkanalrades der Fig. 1 ohne saugseitige Deckscheibe und in
  • Fig. 3 eine perspektivische Darstellung des Grund- und des Einsatzkörpers des Kanalrades der Fig. 1.
The invention is explained in more detail using an exemplary embodiment. The drawing shows in
  • Fig. 1 shows a single-channel wheel designed according to the invention in a sectional view, in
  • Fig. 2 is a front view of the single-channel wheel of Fig. 1 without the suction-side cover plate and in
  • 3 is a perspective view of the base and the insert body of the channel wheel of FIG. 1st

Hauptbestandteile des in der Zeichnung dargestellten Einkanalrades sind ein Grundkörper (1) und ein Einsatzkörper (2). Während der Einsatzkörper (2) aus einem einstückig gefertigten Kunststoffteil besteht, ist der Grundkörper (1) aus mehreren, durch Schweißen miteinander verbundenen Teilen hergestellt: Eine druckseitige Deckscheibe (3) ist verbunden mit einem Nabenkörper (4), der zur Befestigung des Einkanalrades an einer nicht dargestellten Kreiselpumpen­welle dient. Die druckseitige Deckscheibe (3) ist, ebenso wie eine saugseitige Deckscheibe (5) und deren Saugmund (6) sowie ein die Deckscheiben (3 und 5) verbindender Steg (7), aus Stahlblech gefertigt.The main components of the single-channel wheel shown in the drawing are a base body (1) and an insert body (2). While the insert body (2) consists of a one-piece plastic part, the base body (1) is made of several parts that are connected by welding: A pressure-side cover disk (3) is connected to a hub body (4) that is used to attach the single-channel wheel a centrifugal pump shaft, not shown. The pressure-side cover plate (3), like a suction-side cover plate (5) and its suction mouth (6) and a web (7) connecting the cover plates (3 and 5), are made of sheet steel.

Zur Komplettierung des Einkanalrades wird der Einsatzkörper (2) radial von außen in den Grundkörper (1) eingeführt und an den Steg (7) angelegt. Durch die mittels Verschrauben erfolgende Befestigung des Einkanalrades auf der Kreiselpumpen­welle werden auch der Grundkörper (1) und der Einsatzkörper (2) in ihrer Lage zueinander fixiert.To complete the single-channel wheel, the insert body (2) is inserted radially from the outside into the base body (1) and placed on the web (7). The base body (1) and the insert body (2) are also fixed in their position relative to one another by means of the fastening of the single-channel wheel on the centrifugal pump shaft by means of screwing.

Der Grundkörper (1) kann, abweichend vom Ausführungsbeispiel, auch aus einem metallischen Guß oder aus Kunststoff bestehen. Der strömungsführende Einsatzkörper (2), der durch Schrauben, Klemmen, Schweißen, Nieten oder Kleben mit dem Grundkörper (1) in Verbindung steht, kann auch aus Blech geformt, gegossen oder aus einem keramischen Material hergestellt sein. Seine Kontur kann, je nach Anforderung, innerhalb, außerhalb oder mit dem Grundkörper (1) enden.In a departure from the exemplary embodiment, the base body (1) can also consist of a metallic casting or of plastic. The flow-carrying insert body (2), which is connected to the base body (1) by screwing, clamping, welding, riveting or gluing, can also be formed from sheet metal, cast or made from a ceramic material. Depending on requirements, its contour can end inside, outside or with the base body (1).

Claims (8)

1. Kanalrad für Kreiselpumpen, gekennzeichnet durch einen eine druckseitige Deckscheibe (3) und einen Nabenkörper (4) umfassenden Grundkörper (1) und einen oder mehrere am Grundkörper (1) befestigte strömungsführende Einsatzkörper (2).1. Channel wheel for centrifugal pumps, characterized by a base body (1) comprising a pressure-side cover disk (3) and a hub body (4) and one or more flow-guiding insert bodies (2) attached to the base body (1). 2. Geschlossenes Kanalrad nach Anspruch 1, dadurch gekennzeichnet, daß der Grundkörper (1) aus einer druckseitigen Deckscheibe (3) mit Nabenkörper (4), einer saugseitigen Deckscheibe (5) mit Saugmund (6) und einem die Deckscheiben (3, 5) miteinander verbindenden Steg (7) gebildet wird, wobei der Steg (7) als Anschlag für den bzw. die in den Grundkörper (1) eingefügten Einsatzkörper (2) dient.2. Closed channel wheel according to claim 1, characterized in that the base body (1) from a pressure-side cover plate (3) with a hub body (4), a suction-side cover plate (5) with a suction mouth (6) and one of the cover plates (3, 5) connecting web (7) is formed, the web (7) serving as a stop for the insert body (s) (2) inserted into the base body (1). 3. Offenes Kanalrad nach Anspruch 1, gekennzeichnet durch einen einteiligen Einsatzkörper, der mittels der Wellenbefestigung des Kanalrades mit dem aus druckseitiger Deckscheibe und Nabenkörper bestehenden Grundkörper verbunden ist.3. Open channel wheel according to claim 1, characterized by a one-piece insert body, which is connected by means of the shaft fastening of the channel wheel with the base body consisting of pressure-side cover plate and hub body. 4. Kanalrad nach den Ansprüchen 1 und 3, dadurch gekennzeichnet, daß der Grundkörper (1) im wesentlichen aus mehreren, durch ein bekanntes Verfahren miteinander verbundenen Blechteilen (3, 5, 6, 7) besteht.4. Channel wheel according to claims 1 and 3, characterized in that the base body (1) consists essentially of several, by a known method interconnected sheet metal parts (3, 5, 6, 7). 5. Kanalrad nach den Ansprüchen 1 bis 3, dadurch gekenn­zeichnet, daß der Grundkörper aus einem nicht­metallischen Werkstoff, insbesondere Kunststoff, besteht.5. Channel wheel according to claims 1 to 3, characterized in that the base body consists of a non-metallic material, in particular plastic. 6. Kanalrad nach Anspruch 1 und einem oder mehreren der folgenden Ansprüche, dadurch gekennzeichnet, daß der bzw. die Einsatzkörper aus einem anderen Material als der Grundkörper insbesondere durch Gießen hergestellt ist bzw. sind.6. Channel wheel according to claim 1 and one or more of the following claims, characterized in that the insert body or the insert body is made of a different material than the base body, in particular by casting. 7. Kanalrad nach Anspruch 1 und einem oder mehreren der folgenden Ansprüche, dadurch gekennzeichnet, daß der bzw. die Einsatzkörper aus einem oder mehreren Blechteilen geformt ist bzw. sind.7. Channel wheel according to claim 1 and one or more of the following claims, characterized in that the insert body or bodies is or are formed from one or more sheet metal parts. 8. Kanalrad nach Anspruch 1 und einem oder mehreren der folgenden Ansprüche, dadurch gekennzeichnet, daß der bzw. die Einsatzkörper aus einem nichtmetallischen Werkstoff, insbesondere Kunststoff, besteht bzw. bestehen.8. Channel wheel according to claim 1 and one or more of the following claims, characterized in that the insert body or the insert body consists of a non-metallic material, in particular plastic.
EP87106548A 1986-05-09 1987-05-06 Channel impeller for centrifugal pumps Expired - Lifetime EP0244844B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87106548T ATE65300T1 (en) 1986-05-09 1987-05-06 CHANNEL WHEEL FOR CENTRIFUGAL PUMPS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3615686 1986-05-09
DE19863615686 DE3615686A1 (en) 1986-05-09 1986-05-09 CHANNEL WHEEL FOR CENTRIFUGAL PUMPS

Publications (3)

Publication Number Publication Date
EP0244844A2 true EP0244844A2 (en) 1987-11-11
EP0244844A3 EP0244844A3 (en) 1988-09-21
EP0244844B1 EP0244844B1 (en) 1991-07-17

Family

ID=6300489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87106548A Expired - Lifetime EP0244844B1 (en) 1986-05-09 1987-05-06 Channel impeller for centrifugal pumps

Country Status (3)

Country Link
EP (1) EP0244844B1 (en)
AT (1) ATE65300T1 (en)
DE (2) DE3615686A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991018210A1 (en) * 1990-05-12 1991-11-28 Ksb Aktiengesellschaft Single-blade impeller for rotary pumps
GB2254891A (en) * 1991-03-26 1992-10-21 Biwater Pumps Limited Single vane impeller.
US5290236A (en) * 1991-09-25 1994-03-01 Baxter International Inc. Low priming volume centrifugal blood pump
GB2293630A (en) * 1994-09-30 1996-04-03 Klein Schanzlin & Becker Ag Centrifugal pump impeller for dirty liquids
US5591404A (en) * 1991-09-25 1997-01-07 Mathewson; Wilfred Integrated low priming volume centrifugal pump and membrane oxygenator
EP1750284A2 (en) * 2005-08-05 2007-02-07 Framatome ANP GmbH Cover element for the reactor core of a nuclear plant and nuclear reactor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010026756B4 (en) * 2010-07-09 2012-10-25 Wilo Se Impeller of a centrifugal pump
DE102019006665A1 (en) 2019-09-23 2021-03-25 KSB SE & Co. KGaA Single impeller

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE697787C (en) * 1937-09-03 1940-10-23 Alfred Kath Process for the production of wheels for Kreem plastic
US2463581A (en) * 1947-02-05 1949-03-08 William H Welsh Impeller
GB813133A (en) * 1956-08-09 1959-05-06 Ralph Edgar Smart Improvements in and relating to pump impellers
US3632220A (en) * 1970-08-27 1972-01-04 Chrysler Corp Coolant pump
FR2242580A1 (en) * 1973-08-31 1975-03-28 Danske Mejeriers Maskinfabrik

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US1305290A (en) * 1919-06-03 krause
US1327812A (en) * 1919-06-06 1920-01-13 American Manganese Steel Co Sectional shoe for the runner-vanes of centrifugal pumps
US1754992A (en) * 1926-12-06 1930-04-15 American Well Works Centrifugal pump
US2272469A (en) * 1939-12-23 1942-02-10 Chicago Pump Co Centrifugal pump
US2262039A (en) * 1940-11-01 1941-11-11 Richard B Pekor Centrifugal pump impeller
US2625884A (en) * 1949-02-23 1953-01-20 William H Welsh Impeller
DE1034031B (en) * 1956-03-31 1958-07-10 Amag Hilpert Pegnitzhuette A G Channel wheel, in particular single-channel wheel for centrifugal pumps to convey sludge-containing waste water
DE1196506B (en) * 1957-05-28 1965-07-08 Klein Schanzlin & Becker Ag Channel wheel for centrifugal pumps
SE426976B (en) * 1979-04-27 1983-02-21 Flygt Ab PADDLE WHEEL
GB2102886B (en) * 1981-07-23 1985-06-19 Wickham And Company Limited D Preventing wear in centrifugal pumps
FI71266C (en) * 1984-10-23 1990-02-27 Ahlstroem Oy SAETT ATT BELAEGGA EN PUMPS LOEPHJUL.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE697787C (en) * 1937-09-03 1940-10-23 Alfred Kath Process for the production of wheels for Kreem plastic
US2463581A (en) * 1947-02-05 1949-03-08 William H Welsh Impeller
GB813133A (en) * 1956-08-09 1959-05-06 Ralph Edgar Smart Improvements in and relating to pump impellers
US3632220A (en) * 1970-08-27 1972-01-04 Chrysler Corp Coolant pump
FR2242580A1 (en) * 1973-08-31 1975-03-28 Danske Mejeriers Maskinfabrik

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991018210A1 (en) * 1990-05-12 1991-11-28 Ksb Aktiengesellschaft Single-blade impeller for rotary pumps
US5348444A (en) * 1990-05-12 1994-09-20 Ksb Aktiengesellschaft Single-blade impeller for centrifugal pumps
GB2254891A (en) * 1991-03-26 1992-10-21 Biwater Pumps Limited Single vane impeller.
US5290236A (en) * 1991-09-25 1994-03-01 Baxter International Inc. Low priming volume centrifugal blood pump
US5591404A (en) * 1991-09-25 1997-01-07 Mathewson; Wilfred Integrated low priming volume centrifugal pump and membrane oxygenator
GB2293630A (en) * 1994-09-30 1996-04-03 Klein Schanzlin & Becker Ag Centrifugal pump impeller for dirty liquids
US5605434A (en) * 1994-09-30 1997-02-25 Ksb Aktiengesellschaft Impeller having transport elements disposed on a pressure side of a cover disk for a centrifugal pump for dirty liquids
GB2293630B (en) * 1994-09-30 1998-11-04 Klein Schanzlin & Becker Ag Centrifugal pump impeller for dirty liquids
EP1750284A2 (en) * 2005-08-05 2007-02-07 Framatome ANP GmbH Cover element for the reactor core of a nuclear plant and nuclear reactor
EP1750284A3 (en) * 2005-08-05 2008-07-09 AREVA NP GmbH Cover element for the reactor core of a nuclear plant and nuclear reactor

Also Published As

Publication number Publication date
EP0244844B1 (en) 1991-07-17
ATE65300T1 (en) 1991-08-15
DE3771383D1 (en) 1991-08-22
EP0244844A3 (en) 1988-09-21
DE3615686A1 (en) 1987-11-12

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