EP0610826A2 - Verbesserte Kreiselpumpe - Google Patents
Verbesserte Kreiselpumpe Download PDFInfo
- 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- Withdrawn
Links
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 230000001360 synchronised effect Effects 0.000 claims abstract description 5
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000000806 elastomer Substances 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 239000002889 diamagnetic material Substances 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
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)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITPD930025A IT1263644B (it) | 1993-02-12 | 1993-02-12 | Pompa centrifuga perfezionata |
ITPD930025 | 1993-02-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0610826A2 true EP0610826A2 (de) | 1994-08-17 |
Family
ID=11390173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94101718A Withdrawn EP0610826A2 (de) | 1993-02-12 | 1994-02-04 | Verbesserte Kreiselpumpe |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0610826A2 (de) |
IT (1) | IT1263644B (de) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19819723A1 (de) * | 1998-05-02 | 1999-11-04 | Wilo Gmbh | Befestigung zwischen Pumpe und Motor |
EP1143148A2 (de) * | 2000-04-07 | 2001-10-10 | SICCE S.p.A. | Elektrisch angetriebene Kreiselpumpe mit vorgegebener Drehrichtung |
WO2001083996A1 (en) | 2000-05-02 | 2001-11-08 | Caprari S.P.A. | Locking device for locking the stator pack of motor-driven pumps |
EP1022841A3 (de) * | 1999-01-19 | 2003-08-06 | Gabriele Croci | Pumpenaggregat, insbesondere für medizinische Verwendung oder für Nahrungsmittel |
US7052230B2 (en) * | 2003-05-08 | 2006-05-30 | Automotive Motion Technology Limited | Pump assembly |
WO2006119761A1 (en) | 2005-05-06 | 2006-11-16 | Asetek A/S | Cooling system for a computer system |
WO2010121407A1 (zh) * | 2009-04-20 | 2010-10-28 | 深圳市拓邦股份有限公司 | 洗碗机专用电机及使用该电机的水泵总成 |
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 (de) * | 2015-08-31 | 2017-03-01 | Johnson Electric S.A. | Flüssigkeitspumpe |
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 |
-
1993
- 1993-02-12 IT ITPD930025A patent/IT1263644B/it active IP Right Grant
-
1994
- 1994-02-04 EP EP94101718A patent/EP0610826A2/de not_active Withdrawn
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19819723A1 (de) * | 1998-05-02 | 1999-11-04 | Wilo Gmbh | Befestigung zwischen Pumpe und Motor |
EP1022841A3 (de) * | 1999-01-19 | 2003-08-06 | Gabriele Croci | Pumpenaggregat, insbesondere für medizinische Verwendung oder für Nahrungsmittel |
EP1143148A2 (de) * | 2000-04-07 | 2001-10-10 | SICCE S.p.A. | Elektrisch angetriebene Kreiselpumpe mit vorgegebener Drehrichtung |
EP1143148A3 (de) * | 2000-04-07 | 2002-09-25 | SICCE S.p.A. | Elektrisch angetriebene Kreiselpumpe mit vorgegebener Drehrichtung |
WO2001083996A1 (en) | 2000-05-02 | 2001-11-08 | Caprari S.P.A. | Locking device for locking the stator pack of motor-driven pumps |
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 (de) * | 2005-05-06 | 2016-08-17 | Asetek A/S | Kühlsystem für ein computersystem |
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 (en) | 2005-05-06 | 2006-11-16 | Asetek A/S | Cooling system for a computer system |
US11994350B2 (en) | 2007-08-09 | 2024-05-28 | Coolit Systems, Inc. | Fluid heat exchange systems |
WO2010121407A1 (zh) * | 2009-04-20 | 2010-10-28 | 深圳市拓邦股份有限公司 | 洗碗机专用电机及使用该电机的水泵总成 |
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 (de) * | 2015-08-31 | 2017-03-01 | Johnson Electric S.A. | Flüssigkeitspumpe |
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 |
---|---|
IT1263644B (it) | 1996-08-27 |
ITPD930025A1 (it) | 1994-08-12 |
ITPD930025A0 (it) | 1993-02-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE ES FR GB |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 19940811 |