EP2888986A1 - Pompe d'évacuation d'un liquide et appareil domestique avec une telle pompe - Google Patents

Pompe d'évacuation d'un liquide et appareil domestique avec une telle pompe Download PDF

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Publication number
EP2888986A1
EP2888986A1 EP14199828.6A EP14199828A EP2888986A1 EP 2888986 A1 EP2888986 A1 EP 2888986A1 EP 14199828 A EP14199828 A EP 14199828A EP 2888986 A1 EP2888986 A1 EP 2888986A1
Authority
EP
European Patent Office
Prior art keywords
impeller
pump
annular
discharging
liquid
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
EP14199828.6A
Other languages
German (de)
English (en)
Other versions
EP2888986B1 (fr
Inventor
Horst Eisert
Zhengwei Li
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=52231979&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2888986(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL14199828T priority Critical patent/PL2888986T3/pl
Publication of EP2888986A1 publication Critical patent/EP2888986A1/fr
Application granted granted Critical
Publication of EP2888986B1 publication Critical patent/EP2888986B1/fr
Active 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
    • 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
    • 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
    • F04D13/0613—Special connection between the rotor compartments
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4225—Arrangements or adaption of recirculation or discharge 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/042—Axially shiftable rotors
    • 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
    • F04D29/08—Sealings
    • F04D29/086—Sealings 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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
    • F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous

Definitions

  • the present invention relates to a pump for discharging a liquid, in particular a dewatering pump.
  • the present invention further relates to a household appliance with such a pump, in particular a dishwasher or a washing machine.
  • the drive shaft rotates together with the rotor of the electric motor in the rotor chamber, while the impeller of the pump rotates in the hydraulic chamber. More details can be found in the European patent application EP 2455614 A2 .
  • the liquid discharged from the pump such as the washing water of a dishwasher or a washing machine, is often soiled with hair, particles, fibers or the like.
  • the impeller is rotated for liquid discharge at a high speed in the hydraulic chamber, wherein the liquid contained in the hair, particles, fibers or the like. With the rotational movement of the impeller in said play and enter the rotary shaft or the Accumulating or rotating the rotary shaft prevents high-speed rotation of the rotating shaft and impairs the drainage performance of the pump.
  • the object of the present invention is to provide a structurally improved pump for discharging a liquid with which the operational drainage capacity of a liquid drainage pump can be ensured.
  • the object is achieved by a pump for discharging a liquid with an engine compartment, an electric motor having a drive shaft and is located in the engine compartment, and an impeller which is attached to the drive shaft, wherein between a front end cap of the engine compartment and the Impeller an axial clearance is present. It is provided that in the front end cap of the engine compartment an annular groove and on the impeller in the direction of the annular groove extending, annular impeller extension is formed.
  • annular impeller extension and the matched annular groove is achieved during a high-speed rotation of the impeller in the liquid during operation of the pump for discharging a liquid that the hair, particles, fibers or the like contained in the liquid.
  • Difficult with the Rotary movement of the impeller can pass through a formed by the annular impeller extension and the tuned annular groove in the axial clearance between the front end cap of the engine compartment and impeller. In this way, it is possible to prevent such foreign bodies from accumulating or winding on the drive shaft or around the drive shaft, thus preventing an operational high-speed rotation of the drive shaft and impairing the drainage performance of the pump.
  • the impeller simultaneously reciprocates axially during high speed rotation with the drive shaft, and with the annular groove in the front end cap, greater space for the axial reciprocation of the impeller can be created to provide contact between the annular impeller extension and to avoid front end cap.
  • both the annular impeller extension of the impeller and the matched annular groove can be provided in an amount of more than one.
  • one or more additional annular impeller extensions and within the annular groove also one or more additional, correspondingly arranged annular grooves may be provided the annular impeller projections each protrude axially into an associated annular groove.
  • the annular impeller extension projects axially into the annular groove.
  • the axial clearance has an axial width which is at least greater than 1.5 mm.
  • the axial width of the axial clearance is between 1.5 mm and 3.5 mm.
  • the annular impeller extension extends axially in the direction of the front end cap of the engine compartment by a predetermined amount.
  • the annular groove is formed in a surface of the front end cap of the engine compartment.
  • annular end cap extension arranged around the annular groove is additionally formed on the front end cap of the engine compartment and extends axially by a predetermined amount.
  • a radial clearance is present between the annular Endkappenfortsatz and annular impeller extension.
  • the radial clearance, the annular groove and the axial play are connected to form a curved channel.
  • the curved channel comprises at least a first and a second corner.
  • both the first and the second corner have an angle of approximately 90 degrees.
  • the curved channel initially extends axially in a direction pointing to the front end cap direction to the first corner and then in the longitudinal direction to the second corner. This in turn is followed by an axial extension in a direction away from the front end cap direction. This results in an even curvilinear curved channel, which makes it even harder that in the Hair, particles, fibers or the like contained. Liquid discharged through this channel in the axial play between the front end cap of the engine compartment and impeller and accumulate or wind on the drive shaft or to the drive shaft.
  • a plurality of annular grooves may be formed in the front end cap and a plurality of annular vane extensions may be formed on the impeller, so that the curved channel has a longer course and more similar first and second corners.
  • the annular groove has a greater radial width than the annular impeller extension.
  • the annular groove has a radial width which is larger by 1-4 mm than the radial width of the annular impeller extension.
  • annular impeller extension protrudes into the annular groove, so that the curved channel described above arises. Moreover, in the high-speed rotation of the impeller, a free rotational movement of the annular impeller extension is made possible in the annular groove.
  • the annular impeller extension has an axial length which is greater than the axial width of the axial clearance.
  • the annular impeller extension has an axial length which is greater by 1.5-4 mm than the axial width of the axial clearance.
  • the annular impeller extension can axially exceed the axial clearance to project into the annular groove and thereby produce the curved channel described above.
  • the impeller is mounted on the drive shaft so that when sliding the impeller on the drive shaft between the impeller and the front end cap of the engine compartment, the axial play arises.
  • the impeller, the annular impeller extension and the annular groove are arranged concentrically with each other.
  • the pump for discharging a liquid is a centrifugal pump for draining water.
  • the invention further proposes a household appliance operated with water, in particular a dishwasher or a washing machine, which comprises a pump for discharging a liquid according to one of the preceding embodiments.
  • the in FIG. 1 illustrated dishwasher GS includes a serving as a washing container interior IR, which is by a door (not labeled) can be opened or closed, wherein the door for the purpose of loading or unloading is pivotally connected to the dishwasher GS.
  • a dish rack GK is arranged for receiving an object to be cleaned, which is removable from the interior IR of the dishwasher GS, in order to simplify the loading or unloading.
  • a spray device in the form of a spray arm SA for applying a fluid to the object to be cleaned is installed in the interior IR of the dishwasher GS, wherein the fluid may be filled with e.g. a cleaning or rinsing agent may be mixed with water to allow cleaning and / or spotless drying of the object to be cleaned.
  • the fluid dripping from the object to be cleaned is collected in a pump sump PS located in a bottom portion of the interior IR of the dishwasher GS.
  • a filter device (not labeled) is installed, with the impurities or particles can be cut out of the circulating fluid.
  • the spray arm SA is flow-connected via a supply line ZL with a circulation pump UP, which is located in the vicinity of the other dishwasher components of a arranged below the interior IR of the dishwasher GS bottom part BO.
  • a circulation pump UP which is located in the vicinity of the other dishwasher components of a arranged below the interior IR of the dishwasher GS bottom part BO.
  • the circulation pump UP comprises an integrated water heater WZ in order to heat the fluid flowing through the circulation pump UP.
  • a separate continuous heating or other water heaters may be provided to heat the fluid.
  • a pump for discharging a liquid LP in particular for discharging a befindliches in the interior IR of the dishwasher GS liquid is provided, which can be fluidly connected both with the pump sump PS and with a drainage line EL of a household wastewater drainage network.
  • the pump for discharging a liquid LP in particular for discharging a located in the interior IR of the dishwasher
  • the impeller 30 is mounted in a region of the rotary shaft 40 facing the front end cap 11, wherein an annular impeller projection 31 formed on the impeller 30 projects in the direction of the annular groove 12 in the front end cap 11, preferably in the Annular groove 12, extends.
  • the annular groove 12 has a radial width which is preferably larger by 1-4 mm than the radial width of the annular impeller extension 31.
  • the impeller 30, the annular impeller extension 31 and the annular groove 12 are arranged concentrically with each other.
  • the impeller 30 is in the forward end cap 11 facing portion of the rotary shaft 40 attached to this so that between the impeller 30 and front end cap 11 an axial clearance L1 is present, see FIG. 4 .
  • This axial clearance L1 has an axial width which is at least greater than 1.5 mm and preferably between 1.5 mm and 3.5 mm.
  • the annular impeller extension 31 has an axial length which is preferably 1.5-4 mm larger than the axial width of the axial clearance L1, and therefore can axially exceed the axial clearance L1 to project into the annular groove 12.
  • annular impeller extension 31 and the matched annular groove 12 is achieved during high-speed rotation of the impeller 30 in the liquid during operation of the pump for discharging a liquid that contained in the liquid hair, particles, fibers or the like. Only difficult with the rotational movement of the impeller 30 through the formed by the annular impeller extension 31 and the matched annular groove 12, curved channel 80 can get into the axial clearance L1 between the front end cap 11 of the engine compartment 10 and impeller 30. In this way, it is possible to prevent such foreign bodies from accumulating or twisting on the drive shaft 40 or around the drive shaft, thereby preventing an operational high-speed rotation of the drive shaft 40 and impairing the drainage performance of the pump.
  • the impeller 30 simultaneously reciprocates axially during high speed rotation with the drive shaft 40, and with the annular groove 12 in the front end cap 11, greater space for the axial reciprocation of the impeller 30 can be created to make contact between annular impeller extension 31 and front end cap 11 and to prevent associated high speed rotation prevention.
  • both the annular impeller extension 31 of the impeller 30 and the matched annular groove 12 may be provided in an amount greater than one.
  • one or more additional annular impeller extensions and within the annular groove 12 also one or more additional, correspondingly arranged Ring grooves may be provided, wherein the annular impeller projections each protrude axially into an associated annular groove.
  • an even longer and curvilinear curved channel 80 can be produced, making it even more difficult for the hair, particles, fibers or the like contained in the discharged liquid to pass through the curved channel 80 in the axial play L1 between the front end cap 11 of the Engine compartment 10 and impeller 30 enter and accumulate or wind on the drive shaft 40 or to the drive shaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP14199828.6A 2013-12-27 2014-12-22 Pompe d'évacuation d'un liquide et appareil domestique avec une telle pompe Active EP2888986B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14199828T PL2888986T3 (pl) 2013-12-27 2014-12-22 Pompa do odprowadzania płynu i urządzenie gospodarstwa domowego z taką pompą

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310740096.0A CN104747458A (zh) 2013-12-27 2013-12-27 排放液体的泵及具有该泵的家用电器

Publications (2)

Publication Number Publication Date
EP2888986A1 true EP2888986A1 (fr) 2015-07-01
EP2888986B1 EP2888986B1 (fr) 2020-12-02

Family

ID=52231979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14199828.6A Active EP2888986B1 (fr) 2013-12-27 2014-12-22 Pompe d'évacuation d'un liquide et appareil domestique avec une telle pompe

Country Status (4)

Country Link
EP (1) EP2888986B1 (fr)
CN (1) CN104747458A (fr)
ES (1) ES2835252T3 (fr)
PL (1) PL2888986T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114394170A (zh) * 2022-03-04 2022-04-26 珠海市一微机器人技术有限公司 一种驱动轮模组及轮式机器人

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10513928B2 (en) * 2017-08-31 2019-12-24 Flowserve Management Company Axial thrust balancing device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6905217U (de) * 1969-02-11 1969-11-20 Licentia Gmbh Zentrifugalpumpe fuer wasch- oder geschirrspuelmaschinen
EP0487785A1 (fr) * 1990-11-30 1992-06-03 Siemens Aktiengesellschaft Entrainement pour rotor de pompe
JPH10274195A (ja) * 1997-03-31 1998-10-13 Matsushita Electric Ind Co Ltd ポンプ
DE102009028310A1 (de) * 2009-08-06 2011-02-10 Robert Bosch Gmbh Flüssigkeitspumpe
EP2455614A2 (fr) 2010-11-23 2012-05-23 ebm-papst Landshut GmbH Pompe destinée au transport de liquides
WO2012123978A2 (fr) * 2011-03-15 2012-09-20 Hydor Srl Moteur électrique synchrone pour le fonctionnement d'une pompe et pompe à moteur correspondante

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1226677B (it) * 1988-08-17 1991-01-31 Nowax Srl Turbomacchina operatrice, in particolare elettropompa, con struttura di collegamento motore - pompa migliorata
KR970006929A (ko) * 1995-07-25 1997-02-21 배순훈 냉각수 강제순환방식의 온수순환펌프
CN2485457Y (zh) * 2001-05-29 2002-04-10 于国强 一种改进的家用电器排水泵用叶轮

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6905217U (de) * 1969-02-11 1969-11-20 Licentia Gmbh Zentrifugalpumpe fuer wasch- oder geschirrspuelmaschinen
FR2035233A5 (fr) * 1969-02-11 1970-12-18 Licentia Gmbh
EP0487785A1 (fr) * 1990-11-30 1992-06-03 Siemens Aktiengesellschaft Entrainement pour rotor de pompe
JPH10274195A (ja) * 1997-03-31 1998-10-13 Matsushita Electric Ind Co Ltd ポンプ
DE102009028310A1 (de) * 2009-08-06 2011-02-10 Robert Bosch Gmbh Flüssigkeitspumpe
EP2455614A2 (fr) 2010-11-23 2012-05-23 ebm-papst Landshut GmbH Pompe destinée au transport de liquides
WO2012123978A2 (fr) * 2011-03-15 2012-09-20 Hydor Srl Moteur électrique synchrone pour le fonctionnement d'une pompe et pompe à moteur correspondante

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114394170A (zh) * 2022-03-04 2022-04-26 珠海市一微机器人技术有限公司 一种驱动轮模组及轮式机器人

Also Published As

Publication number Publication date
CN104747458A (zh) 2015-07-01
ES2835252T3 (es) 2021-06-22
EP2888986B1 (fr) 2020-12-02
PL2888986T3 (pl) 2021-06-14

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