EP1387086A1 - Kreiselpumpe - Google Patents

Kreiselpumpe Download PDF

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Publication number
EP1387086A1
EP1387086A1 EP02425599A EP02425599A EP1387086A1 EP 1387086 A1 EP1387086 A1 EP 1387086A1 EP 02425599 A EP02425599 A EP 02425599A EP 02425599 A EP02425599 A EP 02425599A EP 1387086 A1 EP1387086 A1 EP 1387086A1
Authority
EP
European Patent Office
Prior art keywords
impeller
blading
shaft
pump according
previous
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Withdrawn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
EP02425599A
Other languages
English (en)
French (fr)
Inventor
Andrea Ambrosi
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.)
Bonferraro SpA
Original Assignee
Bonferraro SpA
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 Bonferraro SpA filed Critical Bonferraro SpA
Priority to EP02425599A priority Critical patent/EP1387086A1/de
Priority to EP20020425649 priority patent/EP1406017A1/de
Publication of EP1387086A1 publication Critical patent/EP1387086A1/de
Withdrawn legal-status Critical Current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
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0027—Varying behaviour or the very pump
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/50—Fluid-guiding means, e.g. diffusers adjustable for reversing fluid flow
    • F04D29/506—Fluid-guiding means, e.g. diffusers adjustable for reversing fluid flow especially adapted for liquid pumps

Definitions

  • the present invention relates to a centrifugal pump, and in particular to a pump which can pump liquids in a manner effective and independent from the rotation direction of the impeller.
  • centrifugal pumps in particular those for electric household appliances, can be driven by asynchronous or synchronous electric motors.
  • Synchronous motors are preferable, since they are more reliable than the asynchronous ones, however they need an electronic system for controlling the rotation direction, because they can randomly rotate in one direction or in the other one. Therefore, the costs and the manufacture complexity of the pump are increased by this control system required to impose only one rotation direction to the synchronous motor.
  • the object of the present invention is therefore to provide a pump free from this drawback, that is a pump which can work in a manner correct and independent from the rotation direction of the shaft of the motor, in particular of a synchronous electric motor. Said object is achieved with a pump whose main features are specified in the first claim and other features are specified in the following claims.
  • the pump according to the present invention automatically selects the blading suitable for the liquid pumping, so as to work correctly even if directly linked to a synchronous electric motor.
  • the double blading of the impeller can even be used for other objects, for example to obtain two different types of pumping according to the rotation direction of the impeller, controlled from the outside.
  • the centrifugal pump according to the first embodiment of the invention comprises in a known way an impeller 1 provided with a first blading 2 suitable for pumping liquids from an axial direction to a radial direction, as indicated by arrows 3. These liquids are sucked in by at least one inlet conduit 4 and pumped towards a manifold 5, generally having a substantially cylindrical shape, which is arranged around impeller 1 and is provided with one or more delivery conduits 6 for the liquids pumped by impeller 1.
  • Figure 2 shows the blades of blading 2 (drawn with partially broken lines) which are suitably oriented to pump liquids towards manifold 5 in the direction of arrows 3 according to the rotation direction (counterclockwise in the figure) of impeller 1.
  • impeller 1 is mechanically linked to a shaft 7 which can be driven by a motor 8 through a mechanism comprising a screw 9 which is fixed to shaft 7 and is rotatably arranged inside a cylindrical hub 10 joined to impeller 1, in particular integral thereto.
  • the cylindrical hub 10 is suitably provided with an inner protrusion 11 suitable for sliding along the helicoidal canal 12 of screw 9, so that the rotation of shaft 7 in one direction or in the other one causes the advancing or the moving back, respectively, of impeller 1 in a housing 13 having a substantially cylindrical shape obtained in the body of the pump.
  • the axial movement of impeller 1 with respect to shaft 7 is limited by a pair of cylindrical shoulders 14 which are arranged at the two ends of screw 9 and stop the sliding of the internal protrusion 11 along the helicoidal canal 12.
  • impeller 1 is provided with a second blading 15 which is oriented in the opposite direction with respect to the direction of the first blading 2, is arranged in a substantially coaxial way with the latter and is divided therefrom by a cover disk 16.
  • the selection of bladings 2 or 15 with the orientation suitable for pumping the liquids coming from the inlet conduit 4 toward manifold 5 is automatically accomplished by the pump according to the rotation direction of shaft 7, since the rotation thereof in one direction or in another one causes the axial moving of impeller 1 in housing 13 and the consequent arrangement of blading 2 or 15 suitable for pumping according to the rotation direction of shaft 7 close to one cylindrical opening 17 which connects housing 13 of impeller 1 with manifold 5.
  • the height of opening 17 is substantially equal to the height of bladings 2 and 15, that is to the height of the two conduits of impeller 1 which comprise these bladings and are divided by the cover disk 16.
  • Figure 6 shows a second embodiment of the invention, which differs from the first one because the shoulders 14 limit the sliding of hub 10 and not of protrusion 11 into the helicoidal canal 12.
  • Figure 7 shows a third embodiment of the invention, which differs from the previous one because the helicoidal canal 12 is obtained in the internal wall of hub 10, so as to form a female screw 9 integral with the latter, while protrusion 11 is rigidly connected to shaft 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP02425599A 2002-10-03 2002-10-03 Kreiselpumpe Withdrawn EP1387086A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP02425599A EP1387086A1 (de) 2002-10-03 2002-10-03 Kreiselpumpe
EP20020425649 EP1406017A1 (de) 2002-10-03 2002-10-28 Kreiselpumpe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02425599A EP1387086A1 (de) 2002-10-03 2002-10-03 Kreiselpumpe

Publications (1)

Publication Number Publication Date
EP1387086A1 true EP1387086A1 (de) 2004-02-04

Family

ID=30011330

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02425599A Withdrawn EP1387086A1 (de) 2002-10-03 2002-10-03 Kreiselpumpe

Country Status (1)

Country Link
EP (1) EP1387086A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2713309C1 (ru) * 2019-03-27 2020-02-04 Общество С Ограниченной Ответственностью "Нефтекамский Машиностроительный Завод" Вертикальный одноступенчатый центробежный насос
CN112943621A (zh) * 2021-02-08 2021-06-11 邵立坤 一种潜水排污泵

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916997A (en) * 1956-04-09 1959-12-15 Sarl Johannes Freres Double-outlet centrifugal pump
GB1398148A (en) * 1971-10-12 1975-06-18 Esswein Sa Pumping devices for liquids and dishwashing machines equipped with such devices
US4941801A (en) * 1988-03-23 1990-07-17 Aisin Seiki Kabushiki Kaisha Double water pump device
EP0465787A1 (de) * 1990-07-12 1992-01-15 Zanussi Elettrodomestici S.p.A. Geschirrspülmaschine mit Motorpumpenaggregat

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916997A (en) * 1956-04-09 1959-12-15 Sarl Johannes Freres Double-outlet centrifugal pump
GB1398148A (en) * 1971-10-12 1975-06-18 Esswein Sa Pumping devices for liquids and dishwashing machines equipped with such devices
US4941801A (en) * 1988-03-23 1990-07-17 Aisin Seiki Kabushiki Kaisha Double water pump device
EP0465787A1 (de) * 1990-07-12 1992-01-15 Zanussi Elettrodomestici S.p.A. Geschirrspülmaschine mit Motorpumpenaggregat

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2713309C1 (ru) * 2019-03-27 2020-02-04 Общество С Ограниченной Ответственностью "Нефтекамский Машиностроительный Завод" Вертикальный одноступенчатый центробежный насос
CN112943621A (zh) * 2021-02-08 2021-06-11 邵立坤 一种潜水排污泵

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