EP1227247A2 - Integrierte Motorpumpe mit Seitenkanallaufrad - Google Patents

Integrierte Motorpumpe mit Seitenkanallaufrad Download PDF

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Publication number
EP1227247A2
EP1227247A2 EP01127888A EP01127888A EP1227247A2 EP 1227247 A2 EP1227247 A2 EP 1227247A2 EP 01127888 A EP01127888 A EP 01127888A EP 01127888 A EP01127888 A EP 01127888A EP 1227247 A2 EP1227247 A2 EP 1227247A2
Authority
EP
European Patent Office
Prior art keywords
pump
motor
casing
impeller
pump according
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
EP01127888A
Other languages
English (en)
French (fr)
Other versions
EP1227247B1 (de
EP1227247A3 (de
Inventor
Massimo Furlan
Vincenzo Girlando
Piero Grassato
Massimo Rigo
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.)
APPLIANCES COMPONENTS COMPANIES S.P.A.
Original Assignee
Sole 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 Sole SpA filed Critical Sole SpA
Publication of EP1227247A2 publication Critical patent/EP1227247A2/de
Publication of EP1227247A3 publication Critical patent/EP1227247A3/de
Application granted granted Critical
Publication of EP1227247B1 publication Critical patent/EP1227247B1/de
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
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative 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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/064—Details of the magnetic circuit

Definitions

  • the present invention refers to a motor-pump of the regenerative type, comprising a chamber in which there is provided a concentric impeller rotating about an axis and provided with substantially radial vanes that are adapted to impart a kinetic impulse to the working fluid of the pump, which translates into delivery head at the outlet of the pump.
  • the driving motor is mounted outside the pump itself, so that the overall axial size of the whole pump and motor assembly turns out to be undesirably large.
  • a further purpose of the present invention is to provide a motor-pump of the above cited kind, which has a high delivery head and, as a result, is particularly suitable for use to water circulation purposes in a dishwashing machine or the like.
  • these aims are reached through the use of a pump of a regenerative type driven by an electric motor that is substantially housed coaxially within the casing of the same pump, thereby achieving a significant reduction in the overall axial size of the whole motor-pump assembly.
  • the motor-pump can be noticed to mainly comprise an electric motor adapted to drive the coaxial impeller 5 of a water circulation pump 28 of the regenerative type, ie. a pump that is largely known to feature a quite high head-to-flow rate ratio and is particularly suitable for use in such applications as the ones involving the delivery of washing liquor to the rotating spray arms in a dishwashing machine.
  • a water circulation pump 28 of the regenerative type ie. a pump that is largely known to feature a quite high head-to-flow rate ratio and is particularly suitable for use in such applications as the ones involving the delivery of washing liquor to the rotating spray arms in a dishwashing machine.
  • the water circulation pump 28 comprises a substantially cylindrical casing 2 that is coupled to a properly shaped shroud 13 with which it defines an annular chamber 30 of the pump 28.
  • an inlet 3 and an outlet 4 which, in this preferred embodiment, are coplanar.
  • the inlet 3 and the outlet 4 are preferably separated from each other by appropriately shaped partitions 25 and 26.
  • the partition piece 25 is provided integrally inside the casing 2, while the partition piece 26 is provided integrally, ie. in a single-piece construction, with the shroud 13.
  • the impeller 5 is of a substantially cylindrical shape, hollow inside, and sealed on top by a coaxial, disc-shaped wall 31, in the middle of which there is provided, in correspondence of a bush 9, a coaxial bore 8.
  • Such a construction defines a niche 10 of a substantially cylindrical shape within the axial thickness of the impeller 5.
  • the impeller 5 there is formed a peripheral niche in which a rotor 7 of the electric driving motor is housed.
  • the rotor 7 is properly sealed, for instance with a coating of epoxy resin.
  • the latter is known to make use of aggressive washing media, since formed generally by a mixture of water and detergents.
  • the properly shaped shroud 13 is arranged inside said niche 10.
  • the shroud 13 has a shape that is defined by an outer circular crown 1, the outer perimeter of which is circumscribed by a peripheral profile 36, while the inner perimeter thereof joins up with a substantially cylindrical central portion 32 that is closed on a side thereof by a disc 33, which in turn comprises a substantially cylindrical, axial recess 14 closed on the opposite side with respect to the disc 33.
  • said properly shaped sealing shroud 13 features a toroidal niche 38 and is attached to the casing 2 by the coupling of the peripheral profile 36 thereof to the grooved mouth 35 of the casing 2 by means of appropriate joining means (not shown, for reasons of greater simplicity) that are capable of ensuring an appropriate water-tightness, ie. an appropriate water sealing action, as well as an appropriate extent of resistance to a chemically aggressive environment.
  • appropriate joining means can include ultrasound welding, bonding, interposition of O-rings, and the like.
  • the recess 14 accommodates internally a bush 15, preferably made of self-lubricating material and is adapted to rotate freely about a journal 17 extending through the bore 8 of the bush 9.
  • a ring 16, preferably made of a self-lubricating material, is arranged between the bush 15 and the bush 9 in view of minimizing friction between the bush 15 and the impeller 5.
  • a ring 18,which is preferably made of a self-lubricating material, is passed through by the journal 17, whose head end portion 37 abuts against a properly shaped cap 19 that is housed inside a cylindrical cavity 20 provided coaxially in the inner surface of the casing 2.
  • the toroidal niche 38 of the sealing shroud 13 accommodates in its interior a stator 11 of the electric driving motor, in which said internally accommodated stator 11 is provided with a central bore 12, which the axial recess 14 extends into.
  • the internal stator 11 is aligned axially with the external rotor 7, in such a manner as to effectively close the magnetic circuit of the electric motor.
  • the properly shaped shroud 13 creates a partition that separates the impeller 5 and the rotor 7 from the internal stator 11 of the electric driving motor, thereby preventing liquor from seeping or flowing into contact with the electric circuit of the stator 11. Furthermore, in order to ensure continuity of the magnetic circuit of the electric motor, the shroud 13 is preferably formed by deep drawing starting from a thin sheet-metal blank of austenitic stainless steel capable of ensuring both a good nonmagnetic behaviour and a high corrosion strength.
  • the mouth, or opening, of the casing 2 is preferably closed by a cover 21, in which there is provided an appropriate sunken or receding profile 22 with a preferably rectangular cross-section, associated to an aperture 23 through which the wire leads (not shown) of the power-supply circuit of the electric driving motor are caused to pass.
  • the above described motor-pump has a structure featuring a particularly reduced overall axial size, since the electric motor 7, 11 is arranged, ie. contained within the axial thickness of the pump 28, in particular of the casing 2 thereof. Such an arrangement of the electric motor 7, 11 is allowed for by the particular construction of the entire impeller 5. Furthermore, the overall axial size of the motor-pump is minimized by the substantially coplanar, or at least non-orthogonal, arrangement of the inlet 3 and the outlet 4 of the pump 28, which is in turn made possible by the fact that the pump itself is of a regenerative type. With this arrangement of the inlet 3 and the outlet 4 thereof, the motor-pump according to the present invention can be operated in a selectively bi-directional manner, for instance to circulate and discharge the washing liquor, respectively.
  • the pump of the regenerative type has advantageously an elevated head-to-flow rate ratio and, as a result, is particularly suitable for applications involving water re-circulation in dishwashing or similar machines, in which it is particularly important for the overall size of the operational parts to be kept as small as possible.
  • the motor-pump will be capable of advantageously rotate at a relatively low revolution speed and, as a result, with a far lower extent of vibrations.
  • stator 11 turns out to have an axial size that is larger than the one of the casing 2
  • stator itself will be accommodated inside the casing 2 in such a manner as to partially protrude outwards.
  • the cover 21 may be omitted. In any case, an advantageous reduction in the overall axial size of the motor-pump will be the ultimate result.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Braking Arrangements (AREA)
EP01127888A 2001-01-25 2001-11-23 Integrierte Motorpumpe mit Seitenkanallaufrad Expired - Lifetime EP1227247B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN010005 2001-01-25
IT2001PN000005A ITPN20010005A1 (it) 2001-01-25 2001-01-25 Motopompa

Publications (3)

Publication Number Publication Date
EP1227247A2 true EP1227247A2 (de) 2002-07-31
EP1227247A3 EP1227247A3 (de) 2004-06-30
EP1227247B1 EP1227247B1 (de) 2008-10-01

Family

ID=11453210

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01127888A Expired - Lifetime EP1227247B1 (de) 2001-01-25 2001-11-23 Integrierte Motorpumpe mit Seitenkanallaufrad

Country Status (5)

Country Link
EP (1) EP1227247B1 (de)
AT (1) ATE409811T1 (de)
DE (1) DE60135969D1 (de)
ES (1) ES2312394T3 (de)
IT (1) ITPN20010005A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1557566A1 (de) * 2004-01-26 2005-07-27 Nidec Shibaura Corporation Kreiselpumpe für Waschmaschinen,
EP1762169A3 (de) * 2005-09-09 2008-08-06 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes Haushaltgerät mit einer Pumpe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11946471B2 (en) 2022-05-22 2024-04-02 Hamilton Sundstrand Corporation Integrated pumps

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750951A (en) 1971-11-03 1973-08-07 Tappan Co Heat system for dishwasher
US3847666A (en) 1973-05-24 1974-11-12 Gen Motors Corp Water heating system for a dishwasher
EP0287984A2 (de) 1987-04-22 1988-10-26 ASKOLL S.p.A. Kreiselpumpe für elektrische Haushaltsgeräte, wie Waschmaschinen, Geschirrspülmaschinen und ähnliches
WO1993012706A1 (en) 1991-12-20 1993-07-08 Fisher & Paykel Limited Dishwasher

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1279135A (en) * 1969-05-13 1972-06-28 Plessey Co Ltd Improvements relating to electrically-driven liquid pumps of the rotary impeller type
JPS4945413A (de) * 1972-09-06 1974-04-30
DE19752884A1 (de) * 1997-11-28 1999-06-10 Bosch Gmbh Robert Förderaggregat für Kraftstoff
DE19957131A1 (de) * 1999-11-26 2001-06-13 Siemens Ag Seitenkanalmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750951A (en) 1971-11-03 1973-08-07 Tappan Co Heat system for dishwasher
US3847666A (en) 1973-05-24 1974-11-12 Gen Motors Corp Water heating system for a dishwasher
EP0287984A2 (de) 1987-04-22 1988-10-26 ASKOLL S.p.A. Kreiselpumpe für elektrische Haushaltsgeräte, wie Waschmaschinen, Geschirrspülmaschinen und ähnliches
WO1993012706A1 (en) 1991-12-20 1993-07-08 Fisher & Paykel Limited Dishwasher

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1557566A1 (de) * 2004-01-26 2005-07-27 Nidec Shibaura Corporation Kreiselpumpe für Waschmaschinen,
EP1762169A3 (de) * 2005-09-09 2008-08-06 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes Haushaltgerät mit einer Pumpe

Also Published As

Publication number Publication date
DE60135969D1 (de) 2008-11-13
ES2312394T3 (es) 2009-03-01
EP1227247B1 (de) 2008-10-01
ATE409811T1 (de) 2008-10-15
ITPN20010005A1 (it) 2002-07-25
EP1227247A3 (de) 2004-06-30

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