EP0731279B1 - Centrifugal pump - Google Patents

Centrifugal pump Download PDF

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Publication number
EP0731279B1
EP0731279B1 EP96101090A EP96101090A EP0731279B1 EP 0731279 B1 EP0731279 B1 EP 0731279B1 EP 96101090 A EP96101090 A EP 96101090A EP 96101090 A EP96101090 A EP 96101090A EP 0731279 B1 EP0731279 B1 EP 0731279B1
Authority
EP
European Patent Office
Prior art keywords
pump
insert member
channel
inlet
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.)
Expired - Lifetime
Application number
EP96101090A
Other languages
German (de)
French (fr)
Other versions
EP0731279A1 (en
Inventor
Albert Genster
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.)
Wilo GmbH
Original Assignee
Wilo GmbH
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 Wilo GmbH filed Critical Wilo GmbH
Publication of EP0731279A1 publication Critical patent/EP0731279A1/en
Application granted granted Critical
Publication of EP0731279B1 publication Critical patent/EP0731279B1/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
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/37—Retaining components in desired mutual position by a press fit connection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the invention relates to a centrifugal pump according to the preamble of claim 1.
  • a centrifugal pump is known from DE-A-3 813 654.
  • Pump housings for centrifugal motor pumps could at Manufacture from a cast material, in particular from metal only be produced using the lost-core process if the Pump inlet with its inlet connection not coaxial to Impeller axis was, but in front of the inlet opening in the Pump chamber is bent to an inline pump form.
  • the Interior of the pump housing undercuts that prevent simple demolding.
  • the object of the invention is a To improve centrifugal pump of the type mentioned at the outset, that it is easy to manufacture.
  • centrifugal pump housings are bent Inlet especially for inline pumps at the simplest producible without a lost-core process require.
  • the inside of the case becomes difficult without it to produce the inner end region of the housing wall made between inlet and pump chamber and then the insert is attached inside. This can the insert part by shrinking the housing be kept.
  • the insert can also be replaced by a positive connection, in particular by a Snap connection to be held on the rest of the pump housing.
  • Pump housing has at least one recess in which the insert with at least one protruding area lies in.
  • the housing 1 of a centrifugal pump has a pump chamber 2, in which an unillustrated impeller turns an axis 3 rotates.
  • the impeller is not on one shown shaft attached by a not shown electric motor is driven.
  • the housing 1 forms a to the center of the impeller or Pump chamber center leading inlet channel 4, which is not is arranged coaxially to axis 3, but opposite this is bent, so that the beginning of the Inlet duct 4 in the form of an inlet connector 5 is arranged perpendicular to axis 3.
  • the pump chamber 2 With its wall, the pump chamber 2 forms one spiral channel around the periphery of the impeller around, this channel opening into an outlet channel 6.
  • the end of the outlet channel forms an outlet nozzle 7, whose axis is aligned with the inlet port 5, so that due to this arrangement of the nozzle 5, 7 such Pump is called an "inline pump”.
  • One and Exhaust nozzle 5, 6 can also deviate from Embodiment with each other an angle of unequal Form 180 degrees while still being perpendicular to Axis 3 are.
  • the inlet duct 4 Since the inlet duct 4 is not coaxial with the axis 3, but turned towards it, it forms one curved inlet area 8, being in this area the inlet duct 4 from the pump chamber 2 through a wall 9 is separated.
  • the inner end region of this wall 9 is not made in one piece with the rest of the housing 1, but is formed by an insert part 10, the is produced separately from the pump housing and afterwards can be inserted and fastened in the pump housing.
  • the insert part 10 thus forms only a short one End region of the inlet channel 4, and forms a curved channel 11 with a semi-spherical cross-section.
  • the both sides of the insert part 10 form two to each other parallel side surfaces 12 which are tangential to Mouth opening 13 of the inlet channel 4 in the pump chamber 2 lie.
  • the pump housing 1 forms for the insert part 10 in curved inlet area 8 recesses 14 in which the insert part 10 after its insertion with lateral Areas protrudes. In the end position it will Insert part 10 by shrinking the housing 1 and / or by a positive connection in particular by a snap connection on the pump housing held.
  • a particularly simple manufacture of the pump housing 1 is made by rotatable inner cores in the printing and Intake area reached.

Description

Die Erfindung betrifft eine Kreiselpumpe nach dem Oberbegriff des Anspruches 1. Eine solche Kreiselpumpe ist aus DE-A-3 813 654 bekannt.The invention relates to a centrifugal pump according to the preamble of claim 1. Such a centrifugal pump is known from DE-A-3 813 654.

Pumpengehäuse für Kreiselmotorpumpen konnten bei der Herstellung aus einem Gußmaterial, insbesondere aus Metall nur im Kernausschmelzverfahren gefertigt werden, wenn der Pumpeneinlaß mit seinem Einlaßstutzen nicht koaxial zur Laufradachse lag, sondern vor der Einlaßöffnung in die Pumpenkammer abgebogen ist, um eine Inline-Pumpe zu bilden. Bei einer solchen Ausführung bildet der Innenbereich des Pumpengehäuses Hinterschneidungen, die ein einfaches Entformen verhindern.Pump housings for centrifugal motor pumps could at Manufacture from a cast material, in particular from metal only be produced using the lost-core process if the Pump inlet with its inlet connection not coaxial to Impeller axis was, but in front of the inlet opening in the Pump chamber is bent to an inline pump form. In such an embodiment, the Interior of the pump housing undercuts that prevent simple demolding.

Aus der DE 38 13 654 ist es bekannt, die komplette Trennwand zwischen Pumpenkammer und Einlaßkanal getrennt zu fertigen. From DE 38 13 654 it is known the complete Partition between the pump chamber and inlet channel separated to manufacture.

Aufgabe der Erfindung ist es, eine Kreiselpumpe der eingangs genannten Art so zu verbessern, daß sie einfache herstellbar ist.The object of the invention is a To improve centrifugal pump of the type mentioned at the outset, that it is easy to manufacture.

Diese Aufgabe wird erfindungsgemäß durch die im kennzeichen des Anspruches 1 angegebenen Merkmale gelöst.This object is achieved by the features specified in the characterizing part of claim 1.

Hierdurch sind Kreiselpumpengehäuse mit abgebogenem Einlaß insbesondere für Inline-Pumpen auf das einfachste herstellbar, ohne ein Kernausschmelzverfahren zu erfordern. Das Gehäuseinnere wird ohne den schwierig herzustellenden inneren Endbereich der Gehäusewand zwischen Einlaß und Pumpenkammer gefertigt und danach wird das Einsetzteil im Inneren befestigt. Hierbei kann das Einsetzteil durch ein Schrumpfen des Gehäuses gehalten sein.As a result, centrifugal pump housings are bent Inlet especially for inline pumps at the simplest producible without a lost-core process require. The inside of the case becomes difficult without it to produce the inner end region of the housing wall made between inlet and pump chamber and then the insert is attached inside. This can the insert part by shrinking the housing be kept.

Alternativ kann aber auch das Einsetzteil durch eine formschlüssige Verbindung insbesondere durch eine Rastverbindung am übrigen Pumpengehäuse gehalten sein.Alternatively, the insert can also be replaced by a positive connection, in particular by a Snap connection to be held on the rest of the pump housing.

Besonders vorteilhaft ist es hierbei, wenn das Pumpengehäuse mindestens eine Ausnehmung aufweist, in der das Einsetzteil mit mindestens einem vorstehenden Bereich einliegt. It is particularly advantageous here if that Pump housing has at least one recess in which the insert with at least one protruding area lies in.

Ein Ausführungsbeispiel ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen:

Figur 1:
Eine Seitenansicht des vom Motor getrennten Pumpengehäuses mit Blick in die Pumpenkammer bei fehlendem Laufrad und
Figur 2:
einen Schnitt in Figur 1.
An embodiment is shown in the drawing and will be described in more detail below. Show it:
Figure 1:
A side view of the pump housing separated from the motor with a view into the pump chamber with the impeller and missing
Figure 2:
a section in Figure 1.

Das Gehäuse 1 einer Kreiselpumpe weist eine Pumpenkammer 2 auf, in der ein nicht dargestelltes Laufrad sich um eine Achse 3 dreht. Das Laufrad ist auf einer nicht dargestellten Welle befestigt, die von einem nicht dargestellten Elektromotor angetrieben ist.The housing 1 of a centrifugal pump has a pump chamber 2, in which an unillustrated impeller turns an axis 3 rotates. The impeller is not on one shown shaft attached by a not shown electric motor is driven.

Das Gehäuse 1 bildet einen zur Laufradmitte bzw. zur Pumpenkammermitte führenden Einlaßkanal 4, der nicht koaxial zur Achse 3 angeordnet ist, sondern gegenüber dieser abgebogen liegt, so daß der Anfang des Einlaßkanals 4 in Form eines Einlaßstutzens 5 rechtwinklig zur Achse 3 angeordnet ist.The housing 1 forms a to the center of the impeller or Pump chamber center leading inlet channel 4, which is not is arranged coaxially to axis 3, but opposite this is bent, so that the beginning of the Inlet duct 4 in the form of an inlet connector 5 is arranged perpendicular to axis 3.

Die Pumpenkammer 2 bildet mit ihrer Wandung einen spiralförmigen Kanal um die Peripherie des Laufrades herum, wobei dieser Kanal in einen Auslaßkanal 6 mündet. Das Ende des Auslaßkanals bildet einen Auslaßstutzen 7, dessen Achse mit dem Einlaßstutzen 5 fluchtet, so daß aufgrund dieser Anordnung der Stutzen 5, 7 eine solche Pumpe eine "Inline-Pumpe" genannt wird. Ein- und Auslaßstutzen 5, 6 können aber auch abweichend vom Ausführungsbeispiel miteinander einen Winkel von ungleich 180 Grad bilden, wobei sie immer noch rechtwinklig zur Achse 3 sind. With its wall, the pump chamber 2 forms one spiral channel around the periphery of the impeller around, this channel opening into an outlet channel 6. The end of the outlet channel forms an outlet nozzle 7, whose axis is aligned with the inlet port 5, so that due to this arrangement of the nozzle 5, 7 such Pump is called an "inline pump". One and Exhaust nozzle 5, 6 can also deviate from Embodiment with each other an angle of unequal Form 180 degrees while still being perpendicular to Axis 3 are.

Da der Einlaßkanal 4 nicht koaxial zur Achse 3 liegt, sondern gegenüber dieser abgebogen ist, bildet er einen sich krümmenden Einlaßbereich 8, wobei in diesen Bereich der Einlaßkanal 4 von der Pumpenkammer 2 durch eine Wand 9 getrennt ist. Der innere Endbereich dieser Wand 9 ist nicht einstückig mit dem übrigen Gehäuse 1 hergestellt, sondern ist von einem Einsetzteil 10 gebildet, das getrennt vom Pumpengehäuse hergestellt wird und danach in das Pumpengehäuse einsteckbar und befestigbar ist.Since the inlet duct 4 is not coaxial with the axis 3, but turned towards it, it forms one curved inlet area 8, being in this area the inlet duct 4 from the pump chamber 2 through a wall 9 is separated. The inner end region of this wall 9 is not made in one piece with the rest of the housing 1, but is formed by an insert part 10, the is produced separately from the pump housing and afterwards can be inserted and fastened in the pump housing.

Das Einsetzteil 10 bildet somit nur einen kurzen Endbereich des Einlaßkanals 4, und bildet hierbei eine gebogene Rinne 11 mit halbkeisförmigen Querschnitt. Die beiden Seiten des Einsetzteils 10 bilden zwei zueinander parallele Seitenflächen 12, die tangential zur Mündungsöffnung 13 des Einlaßkanals 4 in die Pumpenkammer 2 liegen.The insert part 10 thus forms only a short one End region of the inlet channel 4, and forms a curved channel 11 with a semi-spherical cross-section. The both sides of the insert part 10 form two to each other parallel side surfaces 12 which are tangential to Mouth opening 13 of the inlet channel 4 in the pump chamber 2 lie.

Das Pumpengehäuse 1 bildet für das Einsetzteil 10 im gekrümmten Einlaßbereich 8 Ausnehmungen 14, in denen das Einsetzteil 10 nach seinem Einsetzen mit seitlichen Bereichen hineinragt. In der Endstellung wird das Einsetzteil 10 durch ein Schrumpfen des Gehäuses 1 und/oder durch eine formschlüssige Verbindung insbesondere durch eine Rastverbindung am Pumpengehäuse gehalten.The pump housing 1 forms for the insert part 10 in curved inlet area 8 recesses 14 in which the insert part 10 after its insertion with lateral Areas protrudes. In the end position it will Insert part 10 by shrinking the housing 1 and / or by a positive connection in particular by a snap connection on the pump housing held.

Eine besonders einfache Herstellung des Pumpengehäuses 1 wird durch drehbare Innenkerne im Druck- und Saugstutzenbereich erreicht.A particularly simple manufacture of the pump housing 1 is made by rotatable inner cores in the printing and Intake area reached.

Claims (5)

  1. A centrifugal pump having an impeller running in a pump casing (1) which forms a pump chamber (2) and also forms an inlet channel (4) extending to the centre of the impeller and bent in relation to the impeller axis, an outlet channel (6), and a spiral-shaped channel which encloses the periphery of the impeller and discharges into the outlet channel (6), while in the zone where the inlet channel (4) discharges into the pump chamber (2) the inner end zone of the wall (9) separating the inlet channel (4) from the pump chamber (2) is an insert member (10) which is produced separately from the pump casing (1) and which after the production of the pump casing (1) can be inserted and fixed in the interior of the pump casing, and the pump casing (1) has at least one recess (14) in which the insert member (10) is disposed with at least one projecting zone, characterised in that the insert member (10) forms a bent channel (11).
  2. A centrifugal pump according to claim 1, characterised in that the insert member (10) is made from metal or plastics.
  3. A centrifugal pump according to claims 1 or 2, characterised in that the insert member (10) is retained by a shrinkage of the casing (1).
  4. A centrifugal pump according to claims 1 or 2, characterised in that the insert member (10) is retained on the rest of the pump casing (1) by a positive connection, more particularly by a catch connection.
  5. A centrifugal pump according to one of the preceding claims, characterised in that the spigots (5, 7) of the inlet and outlet are in alignment with one another.
EP96101090A 1995-03-01 1996-01-26 Centrifugal pump Expired - Lifetime EP0731279B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19506854A DE19506854A1 (en) 1995-03-01 1995-03-01 Centrifugal pump
DE19506854 1995-03-01

Publications (2)

Publication Number Publication Date
EP0731279A1 EP0731279A1 (en) 1996-09-11
EP0731279B1 true EP0731279B1 (en) 1999-12-08

Family

ID=7755184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96101090A Expired - Lifetime EP0731279B1 (en) 1995-03-01 1996-01-26 Centrifugal pump

Country Status (3)

Country Link
EP (1) EP0731279B1 (en)
KR (1) KR100249102B1 (en)
DE (2) DE19506854A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140369824A1 (en) * 2013-06-13 2014-12-18 Johnson Electric S.A. Circulation Pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201212213D0 (en) * 2012-07-06 2012-08-22 Salamander Pumped Shower Systems Ltd Improvements in pump assemblies

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1763554A1 (en) * 1968-06-22 1971-11-11 Loewe Pumpenfabrik Gmbh Motor pump
US3601498A (en) * 1969-10-23 1971-08-24 Allis Chalmers Mfg Co Centrifugal pump
US3859008A (en) * 1971-07-06 1975-01-07 Andritz Ag Maschf Pump with offset inflow and discharge chambers
US4177008A (en) * 1973-01-26 1979-12-04 Klein, Schanzlin & Becker Aktiengesellschaft Centrifugal pump
AU522300B2 (en) * 1976-07-30 1982-05-27 Ebara Corporation Pump unit
DE3011888A1 (en) * 1980-03-27 1981-10-01 Richard 7066 Baltmannsweiler Halm In line mounting centrifugal pump - has insert in casing with suction channel coupled to suction opening and to impeller
DE8102303U1 (en) * 1981-01-30 1981-07-02 Grundfos A/S, 8850 Bjerringbro CENTRIFUGAL PUMP FOR CONVEYING GAS-LIQUIDS
DE3210526C1 (en) * 1982-03-23 1983-10-06 Grundfos As Housing for single-stage centrifugal pumps
DE3628177C2 (en) * 1986-08-20 1995-01-12 Klein Schanzlin & Becker Ag Inlet housing for turbo machines with radial inflow
DE3813654A1 (en) * 1988-04-22 1989-11-02 Licentia Gmbh Circulation pump
DE3818651A1 (en) * 1988-06-01 1989-12-07 Klein Schanzlin & Becker Ag HOUSING INLINE DESIGN
GB2226364B (en) * 1988-12-24 1992-10-28 Skf Gmbh Liquid pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140369824A1 (en) * 2013-06-13 2014-12-18 Johnson Electric S.A. Circulation Pump
US9624945B2 (en) * 2013-06-13 2017-04-18 Johnson Electric S.A. Circulation pump

Also Published As

Publication number Publication date
KR100249102B1 (en) 2000-04-01
DE19506854A1 (en) 1996-09-05
KR960034751A (en) 1996-10-24
DE59603824D1 (en) 2000-01-13
EP0731279A1 (en) 1996-09-11

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