EP1120572A3 - Centrifugal pump - Google Patents

Centrifugal pump Download PDF

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Publication number
EP1120572A3
EP1120572A3 EP00121080A EP00121080A EP1120572A3 EP 1120572 A3 EP1120572 A3 EP 1120572A3 EP 00121080 A EP00121080 A EP 00121080A EP 00121080 A EP00121080 A EP 00121080A EP 1120572 A3 EP1120572 A3 EP 1120572A3
Authority
EP
European Patent Office
Prior art keywords
pump
pump chamber
housing
housing part
pressure port
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.)
Withdrawn
Application number
EP00121080A
Other languages
German (de)
French (fr)
Other versions
EP1120572A2 (en
Inventor
Andreas Eckbauer
Gunther Martin
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.)
Buehler Motor GmbH
Original Assignee
Buehler Motor 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 Buehler Motor GmbH filed Critical Buehler Motor GmbH
Publication of EP1120572A2 publication Critical patent/EP1120572A2/en
Publication of EP1120572A3 publication Critical patent/EP1120572A3/en
Withdrawn legal-status Critical Current

Links

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
    • F04D29/40—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
    • F04D29/428—Discharge tongues

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

Die Erfindung betrifft eine Kreiselpumpe, mit einem aus spritzgusstechnisch verarbeitbarem Kunststoffmaterial bestehenden zumindest zweiteiligen Pumpengehäuse (2), dessen erstes Gehäuseteil (3) mit einem axial angeformten Saugstutzen (5) und einem in etwa tangential an einer Umfangswandung (14) angeformten Druckstutzen (6) einstückig ist und einen Dichtrand (7) aufweist, über den es dicht mit einem zweiten , einen Eletromotor (10) aufnehmenden Gehäuseteil (4) verbunden ist, wobei das Pumpengehäuse (2) einen im wesentlichen zylindrischen fördermitteldurchströmbaren Pumpenraum (9) einschließt, in welchem ein vom Elektromotor angetriebenes Pumpenrad drehbar angeordnet ist. Bei einer bekannten Kreiselpumpe der gattungsgemäßen Art ist der Übergang zwischen der Pumpenkammer und dem Druckstutzen aus fertigungstechnischen Gründen kantig ausgebildet. Dadurch entstehen Wirbel, die den Wirkungsgrad der Pumpe erheblich herabsetzen. Aufgabe der vorliegenden Erfindung ist es bei einer Kreiselpumpe der gattungsgemäßen Art eine wirtschaftliche Fertigungsmöglichkeit zu schaffen und dabei einen sehr guten Wirkungsgrad zu erreichen. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass innerhalb des durch die beiden Gehäuseteile (3,4) begrenzten Pumpenraumes (9) ein mit einer Rundung (11) versehener Sporn (12) einstückig mit dem zweiten Gehäuseteil derart ausgebildet und im Pumpenraum angeordnet ist, dass er im Übergangsbereich zwischen dem Druckstutzen (6) und dem Pumpenraum (9) am ersten Gehäuseteil einen stetigen und stufenlosen Übergang von der den Pumpenraum begrenzenden Umfangswandung über den Sporn (12) zum Druckstutzen (6) bildet.

Figure 00000001
The invention relates to a centrifugal pump with an at least two-part pump housing (2) made of plastic material that can be processed by injection molding, the first housing part (3) of which has an axially molded suction nozzle (5) and a pressure nozzle (6) formed approximately tangentially on a peripheral wall (14). is in one piece and has a sealing edge (7), via which it is tightly connected to a second housing part (4) receiving an electric motor (10), the pump housing (2) including an essentially cylindrical pump chamber (9) through which conveyable medium can flow, in which a pump wheel driven by the electric motor is rotatably arranged. In a known centrifugal pump of the generic type, the transition between the pump chamber and the pressure port is angular for manufacturing reasons. This creates vortices that significantly reduce the efficiency of the pump. The object of the present invention is to provide an economical production possibility in a centrifugal pump of the generic type and to achieve a very good efficiency. This object is achieved according to the invention in that within the pump chamber (9) delimited by the two housing parts (3, 4), a spur (12) provided with a curve (11) is formed in one piece with the second housing part and arranged in the pump chamber in such a way that it forms in the transition area between the pressure port (6) and the pump chamber (9) on the first housing part a steady and stepless transition from the peripheral wall defining the pump chamber via the spur (12) to the pressure port (6).
Figure 00000001
EP00121080A 2000-01-28 2000-09-28 Centrifugal pump Withdrawn EP1120572A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10003644 2000-01-28
DE10003644A DE10003644C1 (en) 2000-01-28 2000-01-28 Electric circulation pump has injection moulded plastics housing has integral spur projecting into pump space for providing smooth transition between inside wall of pump space and pressure connection

Publications (2)

Publication Number Publication Date
EP1120572A2 EP1120572A2 (en) 2001-08-01
EP1120572A3 true EP1120572A3 (en) 2002-09-18

Family

ID=7628991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00121080A Withdrawn EP1120572A3 (en) 2000-01-28 2000-09-28 Centrifugal pump

Country Status (2)

Country Link
EP (1) EP1120572A3 (en)
DE (1) DE10003644C1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2195733B1 (en) * 2001-07-20 2005-08-16 Fagor, S.Coop. HYDRAULIC PUMP WITH FLOW GUIDE.
DE102006021245B4 (en) * 2006-04-28 2008-03-06 Bühler Motor GmbH rotary pump
DE102007003413A1 (en) * 2007-01-23 2008-07-24 Wilo Ag Pump housing, has intake socket and pressure socket with inner wall with material swelling provided in form of material application, which extends into interior of channel, where swelling forms planar or concave inner surface
CN103062123A (en) * 2012-11-07 2013-04-24 江苏大学 Centrifugal pump volute structure capable of reducing noises and racial forces
EP2944825B1 (en) * 2014-05-12 2020-08-12 Grundfos Holding A/S Pump housing with three flanges
CN105221486B (en) * 2015-11-09 2018-05-15 温州市海格阀门有限公司 A kind of centrifugal pump end cap for being exclusively used in home brew manufacture
CN106194837B (en) * 2016-07-13 2018-07-27 佛山市威灵洗涤电机制造有限公司 Pump case, centrifugal pump and the dish-washing machine of centrifugal pump
CN112746989B (en) * 2019-10-29 2023-09-19 三花亚威科电器设备（芜湖）有限公司 Pump with a pump body

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1526940A (en) * 1975-12-18 1978-10-04 British Gas Corp Centrifugal liquid pumps
FR2402785A1 (en) * 1977-09-07 1979-04-06 Julien & Mege Electrically driven centrifugal pump for central heating - has moulded plastics volute and inlet duct to eye of impeller
FR2641040A1 (en) * 1988-12-24 1990-06-29 Skf Gmbh
DE29504507U1 (en) * 1995-03-21 1995-05-04 Grundfos A/S, Bjerringbro Centrifugal pump housing
US5785507A (en) * 1994-09-19 1998-07-28 Dial Manufacturing, Inc. Evaporative cooler pump
EP0943809A2 (en) * 1998-03-16 1999-09-22 TCG UNITECH Aktiengesellschaft Centrifugal pump

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1158841B (en) * 1959-06-10 1963-12-05 M U K H Schreiner Saugbagger U Pump for pumping solid-water mixtures with exchangeable inner housing
DE1403852A1 (en) * 1961-08-21 1969-01-16 Licentia Gmbh Drain pump
DE1959087A1 (en) * 1969-11-25 1971-05-27 Hanning Elektro Werke Housing for motor pumps

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1526940A (en) * 1975-12-18 1978-10-04 British Gas Corp Centrifugal liquid pumps
FR2402785A1 (en) * 1977-09-07 1979-04-06 Julien & Mege Electrically driven centrifugal pump for central heating - has moulded plastics volute and inlet duct to eye of impeller
FR2641040A1 (en) * 1988-12-24 1990-06-29 Skf Gmbh
US5785507A (en) * 1994-09-19 1998-07-28 Dial Manufacturing, Inc. Evaporative cooler pump
DE29504507U1 (en) * 1995-03-21 1995-05-04 Grundfos A/S, Bjerringbro Centrifugal pump housing
EP0943809A2 (en) * 1998-03-16 1999-09-22 TCG UNITECH Aktiengesellschaft Centrifugal pump

Also Published As

Publication number Publication date
EP1120572A2 (en) 2001-08-01
DE10003644C1 (en) 2001-05-10

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