EP0870928A1 - Umwälz-Kreiselpumpe für Geschirrspülmaschine - Google Patents
Umwälz-Kreiselpumpe für Geschirrspülmaschine Download PDFInfo
- Publication number
- EP0870928A1 EP0870928A1 EP98105074A EP98105074A EP0870928A1 EP 0870928 A1 EP0870928 A1 EP 0870928A1 EP 98105074 A EP98105074 A EP 98105074A EP 98105074 A EP98105074 A EP 98105074A EP 0870928 A1 EP0870928 A1 EP 0870928A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spur
- pump
- support disc
- vanes
- diameter
- 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
Links
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
- F04D29/66—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 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)
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 true EP0870928A1 (de) | 1998-10-14 |
EP0870928B1 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) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7988538B2 (en) | 2006-10-13 | 2011-08-02 | Black & Decker Inc. | Large angle grinder |
Citations (6)
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 |
EP0648939A2 (de) * | 1993-10-18 | 1995-04-19 | Hitachi, Ltd. | Kreiselmaschine für Fluide |
DE19518722A1 (de) * | 1994-05-28 | 1995-11-30 | Miele & Cie | Pumpe, insbesondere Kreiselpumpe als Umwälzpumpe für wasserführende Haushaltgeräte, wie Geschirrspülmaschinen und Waschmaschinen |
-
1998
- 1998-03-20 DE DE69815583T patent/DE69815583T2/de not_active Expired - Lifetime
- 1998-03-20 EP EP98105074A patent/EP0870928B1/de not_active Expired - Lifetime
- 1998-03-20 ES ES98105074T patent/ES2200225T3/es not_active Expired - Lifetime
Patent Citations (6)
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 |
EP0648939A2 (de) * | 1993-10-18 | 1995-04-19 | Hitachi, Ltd. | Kreiselmaschine für Fluide |
DE19518722A1 (de) * | 1994-05-28 | 1995-11-30 | Miele & Cie | Pumpe, insbesondere Kreiselpumpe als Umwälzpumpe für wasserführende Haushaltgeräte, wie Geschirrspülmaschinen und Waschmaschinen |
Non-Patent Citations (5)
Title |
---|
D. FLORJANCIC ET AL.: "primary noise abatement on centrifugal pumps", SULZER TECHNICAL REVIEW, vol. 62, no. 1, January 1980 (1980-01-01), XP002072708 * |
OZTURK C: "TURNING DOWN DRAIN PUMP NOISE", MACHINE DESIGN, vol. 66, no. 22, 21 November 1994 (1994-11-21), pages 60, 62, 64, 66, 68, XP000490691 * |
PATENT ABSTRACTS OF JAPAN vol. 004, no. 158 (M - 039) 5 November 1980 (1980-11-05) * |
PATENT ABSTRACTS OF JAPAN vol. 007, no. 183 (M - 235) 12 August 1983 (1983-08-12) * |
SUTTON M: "NEW DESIGN CONCEPTS - LOWER NOISE LEVELS", WORLD PUMPS, no. 312, 1 September 1992 (1992-09-01), pages 14 - 17, XP000306873 * |
Also Published As
Publication number | Publication date |
---|---|
DE69815583T2 (de) | 2004-04-29 |
EP0870928B1 (de) | 2003-06-18 |
DE69815583D1 (de) | 2003-07-24 |
ES2200225T3 (es) | 2004-03-01 |
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