EP0286954A2 - Self-priming centrifugal pump - Google Patents

Self-priming centrifugal pump Download PDF

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Publication number
EP0286954A2
EP0286954A2 EP88105434A EP88105434A EP0286954A2 EP 0286954 A2 EP0286954 A2 EP 0286954A2 EP 88105434 A EP88105434 A EP 88105434A EP 88105434 A EP88105434 A EP 88105434A EP 0286954 A2 EP0286954 A2 EP 0286954A2
Authority
EP
European Patent Office
Prior art keywords
rib
centrifugal pump
self
guide
priming centrifugal
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
EP88105434A
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German (de)
French (fr)
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EP0286954B1 (en
EP0286954A3 (en
Inventor
Ernst Korthaus
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT88105434T priority Critical patent/ATE83297T1/en
Publication of EP0286954A2 publication Critical patent/EP0286954A2/en
Publication of EP0286954A3 publication Critical patent/EP0286954A3/en
Application granted granted Critical
Publication of EP0286954B1 publication Critical patent/EP0286954B1/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
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/005—Priming of not self-priming pumps by adducting or recycling liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/02—Self-priming pumps

Definitions

  • the invention relates to a self-priming centrifugal pump with impeller cell flushing, rotationally symmetrical guide ring, with at least one cover plate and a central suction nozzle.
  • the centrifugal pump is particularly suitable for pumping dirty water.
  • it is necessary to suck off the gas cushion contained in the suction line as quickly as possible and to expel it via the pressure line.
  • a self-priming centrifugal pump is known with a guide body in the housing spiral, the guide body reaching into the upward pressure port.
  • the guide body In the central region of its extent in the flow direction, the guide body is brought up to the impeller circumference and, with its part pointing downward, ie the part directed against the flow, is designed as a tongue that embraces the impeller with increasing distance in an arc.
  • the guide body There is only one such guide body according to the invention in the spiral housing.
  • the guide body is a part of the volute casing that is connected by the technique of a sewing machine and is not adaptable to a changed impeller diameter for variable operating points of a pump series. Wear of the guide body due to abrasion caused by the conveyance of dirty water can only be remedied by replacing the volute casing.
  • the object of the invention is to design a self-priming centrifugal pump of the type mentioned in such a way that known disadvantages are avoided.
  • the suction port 2 and the pressure port 3 are inserted above the axis of the impeller 4 in the pump housing 1. It is known to ensure that the pump housing 1 does not run empty when the pump is at a standstill.
  • the impeller 4 is surrounded by the ratio-symmetrical open guide ring 5.
  • the impeller blades 6 are curved backwards in the present example.
  • the cover disk 7 here has two pairs of guide ribs 8, one above and one below the impeller axis.
  • the pair of guide ribs 8, 9 consists of the induction rib 8 and the catch rib 9, which are welded onto the cover plate 7 in the example shown.
  • the induction rib 8 and the catch rib 9 are of different lengths, straight, arranged on the line of a secant of the cover plate 7 and at the same distance a on the secant from the impeller axis. If three pairs of guide ribs 8, 9 are used, they are arranged in the form of an isosceles triangle. The induction rib 8 and the catch rib 9 are brought up close to the passing impeller blades.
  • the effect of the induction rib 8 is based on the fact that, due to its special angular adjustment to the passing impeller blade, the water rotating in the guide ring is partially returned to the impeller. This allows the water-air mixture in the impeller to suck in more air from the suction nozzle and thus lead to the suction line being ventilated.
  • the effect of the rib 9 is based on the fact that a part of the water-air mixture thrown back into the guide ring is separated into water and air, the air escapes upwards and the water is brought back into the impeller by the following rib. The separated air is discharged through the pressure port and liquid is quickly conveyed.
  • the impeller 4 which is open on one side, is sealed on the suction side by the cover disk 7.
  • the cover plate 7 can be equipped with an interchangeable locking disk 10 in the central area.
  • the second wall of the guide ring 5 is formed by the housing wall on the drive side.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention is directed to a selfpriming centrifugal pump having a symmetrical annular guide channel with a centrally mounted cover disc. A pair of guide ribs improve the loading of the impeller and increase the capacity for drawing air by suction. The guide rib pair is mounted in the annular guide channel. Each guide rib includes an injection rib and a separation rib. The ribs preferably have a width corresponding to the width of the annular guide channel and are arranged on a secant drawn through the circular peripheral band defined by the outer tips of the vanes of the impeller as the latter rotates.

Description

Die Erfindung betrifft eine selbstansaugende Kreiselpumpe mit Laufradzellenspülung, rotationssymmetrischem Leitring, mit mindestens einer Deckscheibe und einem zentralen Saugstutzen. Die Kreiselpumpe eignet sich besonders zur Förderung von Schmutzwasser.
Für selbstansaugende Kreiselpumpen ist es erforderlich, daß in der Saugleitung enthaltene Gaspolster möglichst schnell abzu­saugen und über die Druckleitung auszustoßen.
Nach DE-PS 959 969 ist eine selbstansaugende Kreiselpumpe bekannt mit einem Leitkörper in der Gehäusespirale, wobei der Leitkörper in den aufwärts gerichteten Druckstutzen hineinreicht. Der Leitkörper ist im mittleren Bereich seiner in Strömungsrichtung vorhandenen Erstreckung bis an den Laufradumfang herangeführt und mit seinem abwärts gerichteten Teil, d.h. dem der Strömung entgegen gerichteten Teil, als eine das Laufrad mit wachsendem Abstand bogenförmig umfassende Zunge ausgebildet. Im Spiral­gehäuse befindet sich nur ein solcher erfindungsgemäßer Leit­körper. Infolge des im Spiralgehäuse angeordneten einen Leit­körpers kommt es zu einseitigen radialen Krafteinwirkungen auf das Laufrad. Darüberhinaus ist der Leitkörper ein geißtechnisch verbundener Bestandteil des Spiralgehäuses und nich anpassbar einem geänderten Laufraddurchmesser für variable Betriebspunkte einer Pumpenbaureihe. Ein Verschleiß des Leitkörpers infolge Abrieb durch Förderung von Schmutzwasser kann nur durch Austausch des Spiralgehäuses behoben werden.The invention relates to a self-priming centrifugal pump with impeller cell flushing, rotationally symmetrical guide ring, with at least one cover plate and a central suction nozzle. The centrifugal pump is particularly suitable for pumping dirty water.
For self-priming centrifugal pumps, it is necessary to suck off the gas cushion contained in the suction line as quickly as possible and to expel it via the pressure line.
According to DE-PS 959 969, a self-priming centrifugal pump is known with a guide body in the housing spiral, the guide body reaching into the upward pressure port. In the central region of its extent in the flow direction, the guide body is brought up to the impeller circumference and, with its part pointing downward, ie the part directed against the flow, is designed as a tongue that embraces the impeller with increasing distance in an arc. There is only one such guide body according to the invention in the spiral housing. As a result of the one guide body arranged in the spiral housing, radial impacts on the impeller occur on one side. In addition, the guide body is a part of the volute casing that is connected by the technique of a sewing machine and is not adaptable to a changed impeller diameter for variable operating points of a pump series. Wear of the guide body due to abrasion caused by the conveyance of dirty water can only be remedied by replacing the volute casing.

Aufgabe der Erfindung ist es, eine selbstansaugende Kreisel­pumpe der genannten Gattung solcherart auszubilden, daß be­kannte Nachteile vermieden werden.The object of the invention is to design a self-priming centrifugal pump of the type mentioned in such a way that known disadvantages are avoided.

Diese Aufgabe wird gemäß der Erfindung gelöst durch die im kenn­zeichnenden Teil des Patentanspruchs 1 herausgestellten Merkmale.This object is achieved according to the invention by the features highlighted in the characterizing part of patent claim 1.

Zweckmäßige Ausgestaltungen sind Gegenstand der Unteransprüche.Appropriate configurations are the subject of the subclaims.

Ein Ausführungsbeispiel ist in den Zeichnungen dargestellt. Es zeigen:

  • Fig. 1 den Querschnitt einer selbstansaugenden Kreiselpumpe in der Laufradmittelebene
  • Fig. 2 den Längsschnitt durch Laufradwelle, Laufrad, Ansaug­stutzen und Druckgehäuse
An embodiment is shown in the drawings. Show it:
  • Fig. 1 shows the cross section of a self-priming centrifugal pump in the center plane of the impeller
  • Fig. 2 shows the longitudinal section through the impeller shaft, impeller, intake manifold and pressure housing

Nach Fig. 1 wird im Pumpengehäuse 1 der Saugstutzen 2 und der Druckstutzen 3 oberhalb der Achse des Laufrades 4 eingeführt. So ist bekannterweise sichergestellt, daß das Pumpengehäuse 1 bei Pumpenstillstand nicht leerläuft. Das Laufrad 4 ist umgeben vom ratationssymmetrischen offenen Leitring 5. Die Laufradschau­feln 6 sind im vorliegenden Beispiel rückwärts gekrümmt. Die Deckscheibe 7 weist hier 2 Leitrippenpaare 8,9, eines oberhalb und eines unterhalb der Laufradachse, auf. Das Leitrippenpaar 8,9 besteht aus der Einspülrippe 8 und der Fangrippe 9, die im dargestellten Beispiel auf der Deckscheibe 7 angeschweißt sind. Einspülrippe 8 und Fangrippe 9 sind von unterschiedlicher Länge, gerade, auf der Linie einer Sekante der Deckscheibe 7 und mit gleichem Abstand a an der Sekante von der Laufradachse angeordnet. Beim Einsatz von drei Leitrippenpaaren 8,9 sind diese in Form eines gleichschenkligen Dreiecks angeordnet. Einspülrippe 8 und Fangrippe 9 sind bis dicht an die vorbei­streichenden Laufradschaufeln herangeführt.1, the suction port 2 and the pressure port 3 are inserted above the axis of the impeller 4 in the pump housing 1. It is known to ensure that the pump housing 1 does not run empty when the pump is at a standstill. The impeller 4 is surrounded by the ratio-symmetrical open guide ring 5. The impeller blades 6 are curved backwards in the present example. The cover disk 7 here has two pairs of guide ribs 8, one above and one below the impeller axis. The pair of guide ribs 8, 9 consists of the induction rib 8 and the catch rib 9, which are welded onto the cover plate 7 in the example shown. The induction rib 8 and the catch rib 9 are of different lengths, straight, arranged on the line of a secant of the cover plate 7 and at the same distance a on the secant from the impeller axis. If three pairs of guide ribs 8, 9 are used, they are arranged in the form of an isosceles triangle. The induction rib 8 and the catch rib 9 are brought up close to the passing impeller blades.

Die Wirkung der Einspülrippe 8 beruht darauf, daß sie durch ihre besondere Winkeleinstellung zur vorbeistreichenden Laufradschaufel das im Leitring rotierende Wasser teilweise wieder in das Lauf­rad zurückführt. Dadurch kann das Wasser-Luftgemisch im Laufrad mehr Luft aus dem Saugstutzen ansaugen und so zur Einlüftung der Saugleitung führen.
Die Wirkung der Fangrippe 9 beruht darauf, daß ein Teil des in den Leitring zurückgeschleuderten Wasser-Luftgemisches in Wasser und Luft getrennt wird, die Luft nach oben entweicht und das Wasser durch die folgende Fangrippe wieder in das Laufrad zurück­geholt wird. Die abgetrennte Luft wird über den Druckstutzen ab­geleitet und es kommt schnell zur Förderung von Flüssigkeit.The effect of the induction rib 8 is based on the fact that, due to its special angular adjustment to the passing impeller blade, the water rotating in the guide ring is partially returned to the impeller. This allows the water-air mixture in the impeller to suck in more air from the suction nozzle and thus lead to the suction line being ventilated.
The effect of the rib 9 is based on the fact that a part of the water-air mixture thrown back into the guide ring is separated into water and air, the air escapes upwards and the water is brought back into the impeller by the following rib. The separated air is discharged through the pressure port and liquid is quickly conveyed.

Aus Fig. 2 sind mehr detaillierte Konstruktionsmerkmale der Krei­selpumpe zu erkennen. Das einseitig offene Laufrad 4 wird saug­seitig von der Deckscheibe 7 abgedichtet. Die Deckscheibe 7 kann im zentralen Bereich mit einer auswechselbaren Schließ­scheibe 10 ausgerüstet sein. Im dargestellten Beispiel wird die zweite Wand des Leitrings 5 durch die antriebsseitige Gehäuse­wand gebildet.2 shows more detailed design features of the centrifugal pump. The impeller 4, which is open on one side, is sealed on the suction side by the cover disk 7. The cover plate 7 can be equipped with an interchangeable locking disk 10 in the central area. In the example shown, the second wall of the guide ring 5 is formed by the housing wall on the drive side.

Die selbstansaugende Kreiselpumpe kann in ihren Einzelheiten vielfältig ausgebildet sein, ohne von ihren erfindungswesent­lichen Merkmalen etwas einzubüßen.The details of the self-priming centrifugal pump can be varied without losing any of the features essential to the invention.

Claims (6)

1. Selbstsaugende Kreiselpumpe mit Laufradzellenspülung, rotationssymmetrischem Leitring (5), mit mindestens einer Deckscheibe (7) und zentralem Saugstutzen (2),
gekennzeichnet durch
mindestens ein Leitrippenpaar (8,9) im Leitring (5), wobei das Leitrippenpaar (8,9) aus einer Fangrippe (9) und einer Einspülrippe (8) besteht, das Leitrippenpaar (8,9) Leitringbreite aufweist und das Leitrippenpaar auf der Linie einer Sekante der Deckscheibe (7) an­geordnet ist.1. Self-priming centrifugal pump with impeller cell flushing, rotationally symmetrical guide ring (5), with at least one cover plate (7) and central suction nozzle (2),
marked by
at least one pair of guide ribs (8,9) in the guide ring (5), the pair of guide ribs (8,9) consisting of a retaining rib (9) and a washing-in rib (8), the pair of guide ribs (8,9) having the guide ring width and the guide rib pair on the Line of a secant of the cover plate (7) is arranged. 2. Selbstansaugende Kreiselpumpe nach Anspruch 1,
dadurch gekennzeichnet,
daß Fangrippe (9) und Einspülrippe (8) zur Sekante abge­winkelt sind.2. Self-priming centrifugal pump according to claim 1,
characterized,
that catch rib (9) and induction rib (8) are angled to the secant. 3. Selbstansaugende Kreiselpumpe nach Anspruch 1, dadurch gekennzeichnet, daß Fangrippe (9) und Einspülrippe (8) verschiedene Längen aufweisen.3. Self-priming centrifugal pump according to claim 1, characterized in that the catch rib (9) and induction rib (8) have different lengths. 4. Selbstansaugende Kreiselpumpe nach Anspruch 1 und 2 da­durch gekennzeichnet,
daß mehrere Leitrippenpaare (8,9) gleichmäßig verteilt angeordnet sind.4. Self-priming centrifugal pump according to claim 1 and 2, characterized in
that several guide rib pairs (8,9) are arranged evenly distributed. 5. Selbstansaugende Kreiselpumpe nach Anspruch 1 bis 3, dadurch gekennzeichnet,
daß Fangrippe (9) und Einspülrippe (8) gekrümmt sind.5. Self-priming centrifugal pump according to claim 1 to 3, characterized in
that catch rib (9) and induction rib (8) are curved. 6. Selbstansaugende Kreiselpumpe nach Anspruch 1 bis 4, dadurch gekennzeichnet,
daß die Fangrippen (9) und die Einspülrippen (8) an der auswechselbaren Deckscheibe (7) angeordnet sind.6. Self-priming centrifugal pump according to claim 1 to 4, characterized in
that the catch ribs (9) and the induction ribs (8) are arranged on the interchangeable cover plate (7).
EP88105434A 1987-04-16 1988-04-06 Self-priming centrifugal pump Expired - Lifetime EP0286954B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88105434T ATE83297T1 (en) 1987-04-16 1988-04-06 SELF-PRIMING CENTRIFUGAL PUMP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873712916 DE3712916A1 (en) 1987-04-16 1987-04-16 SELF-SUCTIONING CENTRIFUGAL PUMP
DE3712916 1987-04-16

Publications (3)

Publication Number Publication Date
EP0286954A2 true EP0286954A2 (en) 1988-10-19
EP0286954A3 EP0286954A3 (en) 1989-01-11
EP0286954B1 EP0286954B1 (en) 1992-12-09

Family

ID=6325756

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88105434A Expired - Lifetime EP0286954B1 (en) 1987-04-16 1988-04-06 Self-priming centrifugal pump

Country Status (7)

Country Link
US (1) US4844687A (en)
EP (1) EP0286954B1 (en)
JP (1) JPS63277886A (en)
AT (1) ATE83297T1 (en)
DE (2) DE3712916A1 (en)
ES (1) ES2037123T3 (en)
IN (1) IN171114B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102913484A (en) * 2012-10-31 2013-02-06 遵义海立水泵制造有限责任公司 Pump top volute casing
CN103133353A (en) * 2013-03-12 2013-06-05 孙九江 Self-suction centrifugal pump

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2533191Y2 (en) * 1991-03-22 1997-04-23 新明和工業株式会社 Pump device
DE4309479A1 (en) * 1993-03-24 1994-09-29 Wilo Gmbh Radial centrifugal pump
DE9317443U1 (en) * 1993-11-15 1994-01-13 Duewag Ag, 47829 Krefeld Water supply system, in particular for catering coaches on passenger trains
US6471476B1 (en) 2000-11-13 2002-10-29 Wacker Corporation Centrifugal trash pump
US7197885B2 (en) * 2004-09-30 2007-04-03 Valeo Climate Control Corp Water separator with ribs
JP4861289B2 (en) * 2004-10-27 2012-01-25 パナソニック株式会社 Fan unit for air conditioner
PL1873399T3 (en) * 2006-06-29 2013-06-28 Grundfos Management As Centrifugal pump unit

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US2792787A (en) * 1953-03-03 1957-05-21 Mcculloch Motors Corp Pumping device
US3506374A (en) * 1968-06-04 1970-04-14 Decatur Pump Co Self-priming pump
DE3539883A1 (en) * 1985-09-18 1987-03-26 Hermetic Pumpen Gmbh Self-priming centrifugal pump
DE8705619U1 (en) * 1987-04-16 1987-07-16 Korthaus, Ernst, Dipl.-Ing., 5982 Neuenrade Self-priming centrifugal pump

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DE673662C (en) * 1937-02-27 1939-03-25 Fedor Werner Self-priming centrifugal pump
US2247817A (en) * 1938-04-30 1941-07-01 Gen Electric Centrifugal pump
US2461925A (en) * 1946-09-05 1949-02-15 Gorman Rupp Co Self-priming centrifugal pump
DE959969C (en) * 1951-05-16 1957-03-14 Georg Volland Dr Ing Self-priming centrifugal pump
US2945448A (en) * 1957-02-15 1960-07-19 Bell & Gossett Co Universal centrifugal pump
GB856886A (en) * 1957-07-30 1960-12-21 Bell & Gossett Co Centrifugal pump
GB974971A (en) * 1959-12-03 1964-11-11 J H Carruthers & Company Ltd A rotary gas pump
US3103177A (en) * 1961-07-20 1963-09-10 Bell & Gossett Co Self-priming centrifugal pump
US3873231A (en) * 1972-08-11 1975-03-25 Allis Chalmers Centrifugal pump diffuser
DE7534163U (en) * 1975-10-28 1976-03-11 Grabbe, Friedbert, Ing.(Grad.), 4300 Essen CENTRIFUGAL PUMP FOR PUMPING LIQUIDS MIXED WITH GASES
FR2405083A1 (en) * 1977-10-04 1979-05-04 Ideal Standard Separation of air from liquid before a centrifugal pump - a chamber being attached to the pump to collect the air
YU41671B (en) * 1979-10-22 1987-12-31 Tozd Tovarna Motorjev Tomos Self suction centrifugal pump
SU987189A1 (en) * 1981-05-19 1983-01-07 Предприятие П/Я В-8319 Vane pump

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Publication number Priority date Publication date Assignee Title
US2792787A (en) * 1953-03-03 1957-05-21 Mcculloch Motors Corp Pumping device
US3506374A (en) * 1968-06-04 1970-04-14 Decatur Pump Co Self-priming pump
DE3539883A1 (en) * 1985-09-18 1987-03-26 Hermetic Pumpen Gmbh Self-priming centrifugal pump
DE8705619U1 (en) * 1987-04-16 1987-07-16 Korthaus, Ernst, Dipl.-Ing., 5982 Neuenrade Self-priming centrifugal pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102913484A (en) * 2012-10-31 2013-02-06 遵义海立水泵制造有限责任公司 Pump top volute casing
CN102913484B (en) * 2012-10-31 2015-11-18 遵义海立水泵制造有限责任公司 A kind of pump top volute
CN103133353A (en) * 2013-03-12 2013-06-05 孙九江 Self-suction centrifugal pump
CN103133353B (en) * 2013-03-12 2015-05-06 孙九江 Self-suction centrifugal pump

Also Published As

Publication number Publication date
EP0286954B1 (en) 1992-12-09
ATE83297T1 (en) 1992-12-15
US4844687A (en) 1989-07-04
DE3712916A1 (en) 1988-11-03
DE3876476D1 (en) 1993-01-21
JPS63277886A (en) 1988-11-15
EP0286954A3 (en) 1989-01-11
DE3712916C2 (en) 1989-11-30
ES2037123T3 (en) 1993-06-16
IN171114B (en) 1992-07-25

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