EP0610826A2 - Pompe centrifuge améliorée - Google Patents

Pompe centrifuge améliorée Download PDF

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Publication number
EP0610826A2
EP0610826A2 EP94101718A EP94101718A EP0610826A2 EP 0610826 A2 EP0610826 A2 EP 0610826A2 EP 94101718 A EP94101718 A EP 94101718A EP 94101718 A EP94101718 A EP 94101718A EP 0610826 A2 EP0610826 A2 EP 0610826A2
Authority
EP
European Patent Office
Prior art keywords
centrifugal pump
pump according
rotor
cup
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.)
Withdrawn
Application number
EP94101718A
Other languages
German (de)
English (en)
Inventor
Elio Marioni
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.)
Askoll SpA
Original Assignee
Askoll 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 Askoll SpA filed Critical Askoll SpA
Publication of EP0610826A2 publication Critical patent/EP0610826A2/fr
Withdrawn legal-status Critical Current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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/047—Bearings hydrostatic; hydrodynamic
    • 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
    • F04D13/0633—Details of the bearings
    • 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
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/30—Retaining components in desired mutual position
    • F05B2260/303—Retaining components in desired mutual position with a bayonet coupling

Definitions

  • the present invention relates to an improved centrifugal pump.
  • the pump can be used, particularly but not exclusively, as a pump for dishwashers, as a pump for other household appliances, as a circulating pump for heating systems, etc.
  • Centrifugal pumps with an asynchronous permanent-magnet motor in which the rotor part is contained in a sealed housing separating it from the stator part and containing a lubricating liquid, are also known.
  • the aim of the present invention is to eliminate the drawbacks mentioned above in pumps with asynchronous motor.
  • a consequent primary object of the present invention is to prevent the onset of noise, vibrations or early wear due to insufficient lubrication.
  • Another important object is to prevent the start-up problems occurring in current pumps with air-immersed rotor due to the mutual sticking of the parts when not in use.
  • an improved centrifugal pump of the type comprising a supporting body for a permanent-magnet synchronous motor with an impeller coupled to its rotor, and for a volute in which said impeller is accommodated, said body and said volute forming a sealed housing which contains the rotor and the impeller in respective chambers, separating them from the stator part of said motor, said pump being characterized in that said rotor is rigidly coupled to a shaft that rotates on sliding bearings supported by elastic supports which are locked in the corresponding chamber, one of said supports defining a ring for providing hydraulic sealing between the two chambers of said housing.
  • a centrifugal pump comprises a supporting body 10 made of plastic material composed of a base 11, from which an element 12, shaped like an inverted cup and open at said base 11, extends at right angles.
  • the element 12 is externally partially surrounded by the poles formed by a pack of metal laminations 13 which, together with windings 14, forms the stator part of the pump motor.
  • the lamination pack 13 is fixed laterally by means of brackets 15 to the base 11 of the body 10.
  • Fixing occurs by means of self-tapping screws 16 that pass in through holes of the brackets 15 and engage tubular tabs 17 of the base 11.
  • An electronic board 18, of the kind disclosed in EPA N. 93109284.5 filed June 9, 1993 by the same Applicant and suitable to achieve the unidirectional rotation of the rotor of a permanent-magnet synchronous motor, is furthermore located on the top of the cup-like element 12.
  • a box-like housing 19 made of plastics covers the entire stator part of the motor and is fixed to the base 11 by means of self-tapping screws 20 that pass in through holes of the housing and engage tubular tabs 21 of said base 11.
  • a permanent-magnet rotor 22 is located inside the element 12 and is thus separated from the stator part; said rotor is embedded in a jacket 23 made of diamagnetic material, for example stainless steel, which accordingly does not affect the operation of the motor.
  • the rotor 22 is rigidly coupled to a shaft 24 passing axially therethrough and a first end 24a whereof is located inside a tapered top portion 25 of the element 12.
  • Said end 24a is rotatable on a sliding bearing 26 having a cylindrical bush and an annular flange on the side of the rotor 22; said bearing is supported by an elastic support constituted by an elastomer ring 27, for example of the O-ring type, which is interposed between said bearing and the wall of the tapered portion 25 in which a corresponding seat is formed.
  • a radial groove 28 is formed on said wall and connects the two internal parts of the tapered portion 25 which are divided by the ring 27.
  • said cap 30 has an internal annular ridge 32 for supporting the bearing 29, an internal annular end lip 33 for forming a sliding seal on the shaft 24, and an annular outer ridge 34 for providing a seal on the inner wall of the cup-like element 12.
  • Said cap 30 is supported by a lid 35 made of plastics which is shaped substantially complementarily thereto and rests between the base 11 and the cup-like element 12 at the open end of the latter.
  • the portion of the cap 30 that comprises the ridge 34 is located between an annular ridge 36 of the lid 35 and the internal wall of the element 12.
  • a washer 37 suitable to prevent wear of the bearing 29, is fixed to the end of the rotor 22 on the side of said cap 30.
  • An annular ridge 38 extends around the lid 35 on said base 11 and forms externally a seat 40 for an elastomer ring 41, for example of the O-ring type, for forming a seal between said ridge 38 and a corresponding ridge 42 of a disk-like intermediate impeller-supporting element 43 which is also made of plastics.
  • the element 43 is fixed to the base 11 by means of self-tapping screws 44 that pass in through holes thereof and engage tubular tabs 45 of said base 11 located internally with respect to the ring 41.
  • the intermediate element 43 has an axial hole allowing the shaft 24 to protrude and has radial spokes 46 resting on the lid 35, locking it between said lid and its corresponding seat.
  • a volute 48 is fixed by means of bayonet couplings 47 on the intermediate element 43 and contains an impeller 49.
  • Said impeller is rigidly coupled to the end 24a of the shaft 24 and is inserted and locked in a tubular insert 50 which is accommodated in an adapted seat 51.
  • a hydraulic sealing ring 52 for example of the O-ring type, is provided between the intermediate element 43 and the volute 48 and is appropriately located between corresponding edges thereof.
  • the permanent-magnet synchronous motor becomes unidirectional due to the presence of the electronic board.
  • volute 48 with an axial intake and a tangential delivery and an impeller 49 with curved vanes.
  • the part of the pump that contains the rotor 22 in one chamber and the impeller 49 in another chamber is fully separated and sealed from the rest.
  • the rotor 22 is immersed in a liquid bath, and this considerably reduces noise and vibrations as well as wear of the sliding bearings.
  • Lubrication is independent, and this avoids the mutual sticking of the parts during idle periods and consequent start-up problems.
  • the materials employed may be any according to the requirements.

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)
EP94101718A 1993-02-12 1994-02-04 Pompe centrifuge améliorée Withdrawn EP0610826A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD930025 1993-02-12
ITPD930025A IT1263644B (it) 1993-02-12 1993-02-12 Pompa centrifuga perfezionata

Publications (1)

Publication Number Publication Date
EP0610826A2 true EP0610826A2 (fr) 1994-08-17

Family

ID=11390173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94101718A Withdrawn EP0610826A2 (fr) 1993-02-12 1994-02-04 Pompe centrifuge améliorée

Country Status (2)

Country Link
EP (1) EP0610826A2 (fr)
IT (1) IT1263644B (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19819723A1 (de) * 1998-05-02 1999-11-04 Wilo Gmbh Befestigung zwischen Pumpe und Motor
EP1143148A2 (fr) * 2000-04-07 2001-10-10 SICCE S.p.A. Pompe centrifugale électrique avec sens de rotation prédéterminée
WO2001083996A1 (fr) 2000-05-02 2001-11-08 Caprari S.P.A. Dispositif de blocage pour bloquer le bloc stator de motopompes
EP1022841A3 (fr) * 1999-01-19 2003-08-06 Gabriele Croci Unité de pompage, en particulier à usage médical ou pour produits alimentaires
US7052230B2 (en) * 2003-05-08 2006-05-30 Automotive Motion Technology Limited Pump assembly
WO2006119761A1 (fr) 2005-05-06 2006-11-16 Asetek A/S Systeme de refroidissement pour un systeme informatique
WO2010121407A1 (fr) * 2009-04-20 2010-10-28 深圳市拓邦股份有限公司 Moteur spécial de lave-vaisselle et ensemble pompe à eau l'utilisant
US7971632B2 (en) 2003-11-07 2011-07-05 Asetek A/S Cooling system for a computer system
CN102840141A (zh) * 2012-09-06 2012-12-26 江门市地尔汉宇电器股份有限公司 一种单相永磁同步电动机直接传动的离心式水泵
EP3135916A1 (fr) * 2015-08-31 2017-03-01 Johnson Electric S.A. Pompe à liquide
CN104822944B (zh) * 2012-12-12 2017-04-12 江门市地尔汉宇电器股份有限公司 交流永磁排水泵
US20170279331A1 (en) * 2016-03-28 2017-09-28 Johnson Electric S.A. Motor and stator thereof
US9927181B2 (en) 2009-12-15 2018-03-27 Rouchon Industries, Inc. Radiator with integrated pump for actively cooling electronic devices
US11725886B2 (en) 2021-05-20 2023-08-15 Coolit Systems, Inc. Modular fluid heat exchange systems
US11994350B2 (en) 2007-08-09 2024-05-28 Coolit Systems, Inc. Fluid heat exchange systems

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19819723A1 (de) * 1998-05-02 1999-11-04 Wilo Gmbh Befestigung zwischen Pumpe und Motor
EP1022841A3 (fr) * 1999-01-19 2003-08-06 Gabriele Croci Unité de pompage, en particulier à usage médical ou pour produits alimentaires
EP1143148A2 (fr) * 2000-04-07 2001-10-10 SICCE S.p.A. Pompe centrifugale électrique avec sens de rotation prédéterminée
EP1143148A3 (fr) * 2000-04-07 2002-09-25 SICCE S.p.A. Pompe centrifugale électrique avec sens de rotation prédéterminée
WO2001083996A1 (fr) 2000-05-02 2001-11-08 Caprari S.P.A. Dispositif de blocage pour bloquer le bloc stator de motopompes
US7052230B2 (en) * 2003-05-08 2006-05-30 Automotive Motion Technology Limited Pump assembly
US10613601B2 (en) 2003-11-07 2020-04-07 Asetek Danmark A/S Cooling system for a computer system
US11287861B2 (en) 2003-11-07 2022-03-29 Asetek Danmark A/S Cooling system for a computer system
US7971632B2 (en) 2003-11-07 2011-07-05 Asetek A/S Cooling system for a computer system
US8240362B2 (en) 2003-11-07 2012-08-14 Asetek A/S Cooling system for a computer system
US10078354B2 (en) 2003-11-07 2018-09-18 Asetek Danmark A/S Cooling system for a computer system
US9715260B2 (en) 2003-11-07 2017-07-25 Asetek Danmark A/S Cooling system for a computer system
US8245764B2 (en) 2005-05-06 2012-08-21 Asetek A/S Cooling system for a computer system
EP3056968A1 (fr) * 2005-05-06 2016-08-17 Asetek A/S Système de refroidissement pour système informatique
US11287862B2 (en) 2005-05-06 2022-03-29 Asetek Danmark A/S Cooling system for a computer system
US10078355B2 (en) 2005-05-06 2018-09-18 Asetek Danmark A/S Cooling system for a computer system
US9733681B2 (en) 2005-05-06 2017-08-15 Asetek Danmark A/S Cooling system for a computer system
US10599196B2 (en) 2005-05-06 2020-03-24 Asetek Danmark A/S Cooling system for a computer system
WO2006119761A1 (fr) 2005-05-06 2006-11-16 Asetek A/S Systeme de refroidissement pour un systeme informatique
US11994350B2 (en) 2007-08-09 2024-05-28 Coolit Systems, Inc. Fluid heat exchange systems
WO2010121407A1 (fr) * 2009-04-20 2010-10-28 深圳市拓邦股份有限公司 Moteur spécial de lave-vaisselle et ensemble pompe à eau l'utilisant
US9927181B2 (en) 2009-12-15 2018-03-27 Rouchon Industries, Inc. Radiator with integrated pump for actively cooling electronic devices
CN102840141B (zh) * 2012-09-06 2015-03-25 江门市地尔汉宇电器股份有限公司 一种单相永磁同步电动机直接传动的离心式水泵
CN102840141A (zh) * 2012-09-06 2012-12-26 江门市地尔汉宇电器股份有限公司 一种单相永磁同步电动机直接传动的离心式水泵
CN104822944B (zh) * 2012-12-12 2017-04-12 江门市地尔汉宇电器股份有限公司 交流永磁排水泵
US10267331B2 (en) 2015-08-31 2019-04-23 Johnson Electric International AG Liquid pump housing
EP3135916A1 (fr) * 2015-08-31 2017-03-01 Johnson Electric S.A. Pompe à liquide
US10468940B2 (en) * 2016-03-28 2019-11-05 Johnson Electric International AG Motor and stator thereof
US20170279331A1 (en) * 2016-03-28 2017-09-28 Johnson Electric S.A. Motor and stator thereof
US11725886B2 (en) 2021-05-20 2023-08-15 Coolit Systems, Inc. Modular fluid heat exchange systems

Also Published As

Publication number Publication date
ITPD930025A0 (it) 1993-02-12
ITPD930025A1 (it) 1994-08-12
IT1263644B (it) 1996-08-27

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