EP0870928B1 - Umwälz-Kreiselpumpe für Geschirrspülmaschine - Google Patents

Umwälz-Kreiselpumpe für Geschirrspülmaschine Download PDF

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Publication number
EP0870928B1
EP0870928B1 EP98105074A EP98105074A EP0870928B1 EP 0870928 B1 EP0870928 B1 EP 0870928B1 EP 98105074 A EP98105074 A EP 98105074A EP 98105074 A EP98105074 A EP 98105074A EP 0870928 B1 EP0870928 B1 EP 0870928B1
Authority
EP
European Patent Office
Prior art keywords
pump
spur
support disc
centrifugal pump
circulating centrifugal
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.)
Expired - Lifetime
Application number
EP98105074A
Other languages
English (en)
French (fr)
Other versions
EP0870928A1 (de
Inventor
Harald Fried
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.)
Whirlpool Corp
Original Assignee
Whirlpool Corp
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 Whirlpool Corp filed Critical Whirlpool Corp
Publication of EP0870928A1 publication Critical patent/EP0870928A1/de
Application granted granted Critical
Publication of EP0870928B1 publication Critical patent/EP0870928B1/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
    • 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
    • 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
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/428—Discharge tongues
    • 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
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise

Definitions

  • the invention relates to a circulating centrifugal pump for a dishwasher with a pump casing with an axial inlet opening and a radial outlet opening, and with a pump chamber expanding in a spiral shape with a spur, and in which there is rotarily mounted a round pump rotor with a predetermined distance from the spur, and whose vanes are disposed on a support disc.
  • Circulating centrifugal pumps of this type having a relatively small consumption of electrical power of the electrical motor, have generated sufficient pump performance to achieve good cleaning of the crockery and generates the necessary pressure and sufficient quantity of water.
  • the known circulating centrifugal pumps of this type eg. DE-A-195 18 722 have a pump runner wheel whose vanes extend as far as the circumference of the carrier disc and have the same spacing from the spur as the carrier disc. The consequence is that during operation of the circulating centrifugal pump a high degree of noise is generated. It is therefore necessary to provide expensive sound deafening measures in order to achieve noise values of less than 50 dB.
  • the circulating centrifugal pump thus improved can be used in high quality dishwashers to reduce the outlay on sound deafening.
  • the diameter of the support disc is selected as 72 mm, and with a radial spacing of 3.8 mm of the support disc, the radial spacing of the vane ends is enlarged to 7.3 to 10.5 mm.
  • the circulating centrifugal pump preferably operates in a rotational speed range of 2500 to 3000 rpm.
  • FIG. 1 shows the pump casing 10 with an axial inlet opening projected thereon with diameter Da.
  • a support disc 12 of a pump runner wheel 20 Disposed in a support disc 12 of a pump runner wheel 20 is a central opening 11 for the motor shaft.
  • the pump chamber 18 narrowing in a spiral form in the direction of rotation of the pump runner wheel forms, in the transition to an outlet opening 15, a spur 17 which acts as a flow break-off point.
  • Disposed on the support disc 12 are curved vanes 16, whose convex sides, during operation of the circulating centrifugal pump are in a leading configuration, as shown by the arrow identified by n in Figure 1.
  • the diameter Db of the support disc 12 is, as Figures 2 and 3 show larger the diameter Df of the ends of the vanes 16.
  • the support disc 12 has a spacing a from the spur 17, which comes to for example 3.8 mm, when the support disc 12 with a diameter Db of 72 mm is adapted to the pump chamber 18.
  • the spacing b between the ends of the vanes 16 and the spur 17 is greater than the spacing a between the support disc 12 and the spur 17 and is selected at between 7.3 to 10.5 mm, i.e. the vane ends are set back with respect to the circumference of the support disc 12 by 3.5 to 6.7 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Washing And Drying Of Tableware (AREA)

Claims (4)

  1. Umwälz-Kreiselpumpe für eine Geschirrspülmaschine mit einem Pumpengehäuse (10) mit axialer Ansaugöffnung (11) und radialer Ausgangsöffnung (15) sowie einer sich spiralförmig erweiternden Pumpenkammer mit Sporn, in der ein rundes Pumpenlaufrad (12) mit vorgegebenem Abstand zum Sporn drehbar gelagert ist und dessen Flügel (16) auf einer Tragscheibe angeordnet sind,
    dadurch gekennzeichnet, dass der Durchmesser (Df) der Enden der Flügel (16) kleiner ist als der Durchmesser (Db) der Tragscheibe (12) und der radiale Abstand (b) der Enden der Flügel (16) zum Sporn (17) entsprechend größer ist als der radiale Abstand (a) der Tragscheibe (12) zum Sporn (17).
  2. Umwälz-Kreiselpumpe nach Anspruch 1,
    dadurch gekennzeichnet, dass der radiale Abstand (a) der Tragscheibe (12) 3,8 mm beträgt und der radiale Abstand (b) der Flügelenden zwischen 7,3 und 10,5 mm liegt.
  3. Umwälz-Kreiselpumpe nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, dass der Durchmesser (Db) der Tragscheibe (12) mit 72 mm gewählt ist.
  4. Umwälz-Kreiselpumpe nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, dass die Drehzahl des Pumpenlaufrades (20) mit 2500 bis 3000 U/min. gewählt ist.
EP98105074A 1997-04-10 1998-03-20 Umwälz-Kreiselpumpe für Geschirrspülmaschine Expired - Lifetime EP0870928B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19714924 1997-04-10
DE19714924 1997-04-10

Publications (2)

Publication Number Publication Date
EP0870928A1 EP0870928A1 (de) 1998-10-14
EP0870928B1 true EP0870928B1 (de) 2003-06-18

Family

ID=7826087

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98105074A Expired - Lifetime EP0870928B1 (de) 1997-04-10 1998-03-20 Umwälz-Kreiselpumpe für Geschirrspülmaschine

Country Status (3)

Country Link
EP (1) EP0870928B1 (de)
DE (1) DE69815583T2 (de)
ES (1) ES2200225T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7988538B2 (en) 2006-10-13 2011-08-02 Black & Decker Inc. Large angle grinder

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR895142A (fr) * 1942-05-29 1945-01-16 Escher Wyss & Cie Const Mec Roue mobile fermée pour compresseurs et pompes centrifuges
CH562964A5 (en) * 1973-03-23 1975-06-13 Saurer Ag Adolph Centrifugal pump with flow deflecting rim - suitable for central heating plant, cavitation noise is almost eliminated
JPS55107099A (en) * 1979-02-07 1980-08-16 Matsushita Electric Ind Co Ltd Blower driven by electric motor
JPS5885397A (ja) * 1981-11-13 1983-05-21 Hitachi Ltd ポンプ羽根車
JP3482668B2 (ja) * 1993-10-18 2003-12-22 株式会社日立製作所 遠心形流体機械
DE19518722A1 (de) * 1994-05-28 1995-11-30 Miele & Cie Pumpe, insbesondere Kreiselpumpe als Umwälzpumpe für wasserführende Haushaltgeräte, wie Geschirrspülmaschinen und Waschmaschinen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7988538B2 (en) 2006-10-13 2011-08-02 Black & Decker Inc. Large angle grinder
US8388417B2 (en) 2006-10-13 2013-03-05 Black & Decker Inc. Large angle grinder

Also Published As

Publication number Publication date
DE69815583T2 (de) 2004-04-29
EP0870928A1 (de) 1998-10-14
ES2200225T3 (es) 2004-03-01
DE69815583D1 (de) 2003-07-24

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