EP1126180A2 - Pumpenlaufrad für eine in Geschirrspülmaschinen einsetzbare Umwälzpumpe - Google Patents
Pumpenlaufrad für eine in Geschirrspülmaschinen einsetzbare Umwälzpumpe Download PDFInfo
- Publication number
- EP1126180A2 EP1126180A2 EP00126832A EP00126832A EP1126180A2 EP 1126180 A2 EP1126180 A2 EP 1126180A2 EP 00126832 A EP00126832 A EP 00126832A EP 00126832 A EP00126832 A EP 00126832A EP 1126180 A2 EP1126180 A2 EP 1126180A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- pump
- blade cover
- blade
- cover
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
Definitions
- the object of the invention relates to a pump impeller for a centrifugal pump, in particular for a circulation pump which can be used in dishwashers or washing machines, which rotates in a pump housing with suction and pressure ports and formed with a plurality of moving blades and with a counter bearing ring of a mechanical seal is, the blades from the wheel hub to the wheel circumference of the wheel extend radially and on an upstream front blade cover and / or pump housing-side rear blade cover are arranged.
- centrifugal pumps of radial design for water-bearing household appliances especially for Dishwashers known whose impellers on the pump housing side or on the inflow side, are open at the back or front. Closed impellers are also known, see FIG. for example DE 198 01 112 A1, in which the rear impeller cover completely removes the blades and the front cover of the blades except for the inlet cross-section covers.
- the open impellers have the advantage that they are easier to manufacture. If necessary, the blade channels of the open impellers can also be subsequently machined well or also clearly visible for inspection purposes. In contrast, the open impellers compared to the closed impellers due to a poorer hydraulic Efficiency because of pressure differences between the front of the blade and The back of the blade causes considerable gap losses.
- the invention has for its object to provide a pump impeller that is simple as well is inexpensive to manufacture, stable pump performance even with axial position tolerances distinguishes, and eliminates annoying running noises and ventilation problems are.
- a pump impeller designated by (1) in Fig. 1 for a known and not shown Centrifugal pump, in particular for one in dishwashers or washing machines Circulation pump that can be used is, according to the invention, a semi-open impeller at the front and rear educated.
- Such an impeller (1) can be installed in a pump housing provided with suction and pressure ports, as shown in DE 198 01 112 A1, for example.
- the Pump shaft sealing in a manner known per se by means of a mechanical seal from a rubber sleeve arranged in the motor-side end shield of the pump housing with a fixed sliding ring made of sintered carbon material or the like and a counter bearing ring (2) made of ceramic material on the impeller (1).
- the slide ring is supported under spring pressure the sealing surface of the ceramic counter bearing ring (2) perpendicular to the shaft.
- the impeller (1) (Fig. 1 to 3) is provided with several blades (3), which are different from the Extend the impeller hub (4) radially towards the outer circumference of the impeller and between the blade covers (5, 6) of the impeller (1) are arranged.
- the impeller (1) with the blade covers (5, 6) according to the invention is made in one piece, preferably in one piece, the initially mentioned semi-open construction is selected. According to this design, they cover both sides of the rotor blades (3) provided for the rotor blade covers (5, 6) (3) front and back only partially.
- the one-piece impeller (1) is designed as an injection molded part, the ceramic counter bearing ring (2) is preferably cast in. According to the embodiment shown (see. in particular Fig. 2) is the ceramic counter bearing ring (2) with one in the impeller material immersed gradation (7) and positively and / or non-positively fixed in the impeller (1).
- the step (7) is encapsulated by the impeller material.
- the blades (3) end on the front blade cover (5) and covered by this in the upper area on a Blade outer circle diameter (A'-5).
- the blade outer circle diameter (A'-5) is preferred smaller than the outer diameter (A-5) of the annular front blade cover (5) selected.
- the outer diameter (A-6) of the rear blade cover (6) or the approximately equal inner diameter (1-5) of the front blade cover (5) lies approximately in the middle between the outer diameter (A-5) of the front blade cover (5) and the blade inner circle diameter (I'-6) the rear cover (6). This makes demoulding a two-part injection mold easy possible.
- the impeller (1) promotes water / air mixtures or foam compared to known impellers with less annoying noise, d. H. relatively quiet. This is achieved due to the large bladed wheel hub, because this causes air bubbles to be drawn in on the upstream side do not shoot straight onto the rear bucket cover and make noises in the event of an impact generate, but in the area of the impeller hub (4) deflected by the blades (3) and be crushed by the blades. This process takes place inside the impeller (1) instead and is largely acoustically decoupled.
- the half-open impeller (1) also advantageously vented, as compared to closed ones
- Impellers are the volumes of the blade-free annular gap spaces between the impeller hub (4) and the pump housing or the front impeller cover (5) and the pump housing is reduced to less than half. By reducing the size of the annular gap spaces This means that less air accumulates, so that the pump is vented less is disabled.
- the impeller (1) can be made in one piece because the outer diameter (A-6) of the rear impeller cover (6) equal to or slightly less than the inside diameter (l-5) of the front cover (5) is. If the mating ring bearing ceramic (2) is inserted into the impeller injection tool, this eliminates the need to mount the bearing separately.
- the complete impeller (1) can be in one Work step.
- the directly overmolded bearing ceramic also reduces the number of components achieved because a sealing sleeve and a brass bushing to be used separately can be omitted for the reception of the ceramic disc. Direct injection of the ceramic counter bearing ring (2) can of course also be used in a multi-part impeller.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
- Figur 1
- ein Pumpenlaufrad einer Kreiselpumpe in der Vorderansicht (Anströmseite),
- Figur 2
- das Pumpenlaufrad in der Seitenansicht im Längsschnitt,
- Fig. 3
- das Pumpenlaufrad in der Rückansicht.
Claims (7)
- Pumpenlaufrad für eine Kreiselpumpe, insbesondere für eine in Geschirrspülmaschinen oder Waschmaschinen einsetzbare Umwälzpumpe, welches in einem mit Ansaug- und Druckstutzen versehenen Pumpengehäuse gegengelagert umläuft und mit mehreren Laufschaufeln sowie mit einem Gegenlagerring einer Gleitringdichtung ausgebildet ist, wobei sich die Laufschaufeln von der Radnabe zum Radumfang des Laufrades radial erstrecken und an einer anströmseitigen vorderen Laufschaufelabdeckung und/oder einer pumpengehäuseseitigen hinteren Laufschaufelabdeckung angeordnet sind,
dadurch gekennzeichnet,
dass das Laufrad (1) mit den Laufschaufelabdeckungen (5, 6) halboffen gestaltet ausgebildet ist. - Pumpenlaufrad nach Anspruch 1,
dadurch gekennzeichnet,
dass das Laufrad (1) als Spritzgussteil einteilig mit ggf. eingegossenem Keramik-Gegenlagerring (2) gefertigt ist. - Pumpenlaufrad nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass die Laufschaufelabdeckungen (5,6) die Laufschaufeln (3) vorder- sowie rückseitig nur teilweise überdecken, wobei die vordere Laufschaufelabdeckung (5) kreisringförmig und die hintere Laufschaufelabdeckung (6) als geschlossene Scheibe mit einem Außendurchmesser (A-6) ausgebildet ist, welcher gleich oder kleiner als der Innendurchmesser (l-5) der vorderen Laufschaufelabdeckung (5) ist. - Pumpenlaufrad nach einem oder mehreren der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
dass die mit der hinteren Laufschaufelabdeckung (6) verbundenen Laufschaufeln (3) vor der Laufradnabe (4) auf einem Schaufel-Innenkreisdurchmesser (l'-6) beginnen und auf der vorderen Laufschaufelabdeckung (5) auf einem Schaufel-Außenkreisdurchmesser (A'-5) enden, der vorzugsweise kleiner als der Außendurchmesser (A-5) der kreisringförmigen vorderen Laufschaufelabdeckung (5) gewählt ist. - Pumpenlaufrad nach einem oder mehreren der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
dass der Außendurchmesser (A-6) der hinteren Laufschaufelabdeckung (6) bzw. der annähernd gleich große Innendurchmesser (l-5) der vorderen Laufschaufelabdeckung (5) vorzugsweise in der Mitte zwischen dem Außendurchmesser (A-5) der anströmseitigen Laufschaufelabdeckung (5) und dem Schaufel-Innenkreisdurchmesser (1'-6) liegt. - Pumpenlaufrad nach einem oder mehreren der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
dass der Keramik-Gegenlagerring (2) form- und/oder kraftschlüssig im Laufrad (1) festgesetzt ist - Pumpenlaufrad nach einem oder mehreren der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
dass der Keramik-Gegenlagerring (2) mit einer Abstufung (7) versehen ist, die vom Laufradmaterial umgossen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10006983A DE10006983A1 (de) | 2000-02-16 | 2000-02-16 | Pumpenlaufrad für eine Kreiselpumpe, insbesondere für eine in Geschirrspülmaschinen oder Waschmaschinen einsetzbare Umwälzpumpe |
DE10006983 | 2000-02-16 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1126180A2 true EP1126180A2 (de) | 2001-08-22 |
EP1126180A3 EP1126180A3 (de) | 2002-08-14 |
EP1126180B1 EP1126180B1 (de) | 2005-03-02 |
Family
ID=7631148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00126832A Expired - Lifetime EP1126180B1 (de) | 2000-02-16 | 2000-12-07 | Pumpenlaufrad für eine in Geschirrspülmaschinen einsetzbare Umwälzpumpe |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1126180B1 (de) |
AT (1) | ATE290169T1 (de) |
DE (2) | DE10006983A1 (de) |
ES (1) | ES2234504T3 (de) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004015274A2 (en) * | 2002-08-13 | 2004-02-19 | Litens Automotive | Internal combustion engine combination with direct camshaft drive coolant pump |
US7047914B2 (en) | 2001-02-15 | 2006-05-23 | Litens Automotive | Internal combustion engine combination with direct camshaft driven coolant pump |
WO2011148398A1 (en) * | 2010-05-28 | 2011-12-01 | Coplast Srl | Cooling fan for a rotary machine |
WO2011148396A1 (en) * | 2010-05-28 | 2011-12-01 | Coplast Srl | Cooling fan for a rotary machine technical field of application of the invention |
WO2011148397A1 (en) * | 2010-05-28 | 2011-12-01 | Coplast Srl | Cooling fan for a rotary machine |
ITPD20100386A1 (it) * | 2010-12-21 | 2012-06-22 | Unox Spa | Ventola perfezionata di ventilatore centrifugo, in particolare destinata a forni di cottura del tipo a convezione e metodo di fabbricazione di detta ventola |
CN102562650A (zh) * | 2010-12-08 | 2012-07-11 | 湖北省天门泵业有限公司 | 泵类半闭式叶轮 |
CN104141632A (zh) * | 2014-07-25 | 2014-11-12 | 吉首长潭泵业有限公司 | 耐磨合金砂浆泵叶轮及其制造方法 |
CN105275834A (zh) * | 2015-10-27 | 2016-01-27 | 上海华鼓鼓风机有限公司 | 一种低速多级垂直剖分筒型结构的三元流离心鼓风机 |
US10349809B2 (en) | 2017-08-08 | 2019-07-16 | Haier Us Appliance Solutions, Inc. | Pump assembly for a dishwashing appliance |
US10349810B2 (en) | 2017-08-08 | 2019-07-16 | Haier Us Appliance Solutions, Inc. | Pump assembly for a dishwashing appliance |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005031589A1 (de) * | 2005-07-06 | 2007-01-11 | Schaeffler Kg | Wasserpumpenflügelrad |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19801112A1 (de) | 1997-01-17 | 1998-07-23 | Miele & Cie | Gleitringdichtung |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3079866A (en) * | 1959-07-16 | 1963-03-05 | Texaco Inc | Modified centrifugal pump |
US3354529A (en) * | 1963-07-29 | 1967-11-28 | Ford Motor Co | Impeller making |
DE3611910A1 (de) * | 1986-04-09 | 1987-10-15 | Schaeffler Waelzlager Kg | Laufrad fuer eine radialpumpe |
DE3706770A1 (de) * | 1987-03-03 | 1988-09-15 | Licentia Gmbh | Kreiselpumpe, insbesondere fuer geschirrspuelmaschinen |
DE3821352C1 (de) * | 1988-06-24 | 1989-11-02 | Goetze Ag, 5093 Burscheid, De | |
DE19530195A1 (de) * | 1995-08-17 | 1997-02-20 | Tuchenhagen Otto Gmbh | Kreiselpumpenlaufrad radialer Bauart |
-
2000
- 2000-02-16 DE DE10006983A patent/DE10006983A1/de not_active Withdrawn
- 2000-12-07 AT AT00126832T patent/ATE290169T1/de not_active IP Right Cessation
- 2000-12-07 ES ES00126832T patent/ES2234504T3/es not_active Expired - Lifetime
- 2000-12-07 DE DE50009642T patent/DE50009642D1/de not_active Expired - Lifetime
- 2000-12-07 EP EP00126832A patent/EP1126180B1/de not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19801112A1 (de) | 1997-01-17 | 1998-07-23 | Miele & Cie | Gleitringdichtung |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7047914B2 (en) | 2001-02-15 | 2006-05-23 | Litens Automotive | Internal combustion engine combination with direct camshaft driven coolant pump |
WO2004015274A2 (en) * | 2002-08-13 | 2004-02-19 | Litens Automotive | Internal combustion engine combination with direct camshaft drive coolant pump |
WO2004015274A3 (en) * | 2002-08-13 | 2004-07-01 | Litens Automotive | Internal combustion engine combination with direct camshaft drive coolant pump |
WO2011148398A1 (en) * | 2010-05-28 | 2011-12-01 | Coplast Srl | Cooling fan for a rotary machine |
WO2011148396A1 (en) * | 2010-05-28 | 2011-12-01 | Coplast Srl | Cooling fan for a rotary machine technical field of application of the invention |
WO2011148397A1 (en) * | 2010-05-28 | 2011-12-01 | Coplast Srl | Cooling fan for a rotary machine |
CN102562650A (zh) * | 2010-12-08 | 2012-07-11 | 湖北省天门泵业有限公司 | 泵类半闭式叶轮 |
ITPD20100386A1 (it) * | 2010-12-21 | 2012-06-22 | Unox Spa | Ventola perfezionata di ventilatore centrifugo, in particolare destinata a forni di cottura del tipo a convezione e metodo di fabbricazione di detta ventola |
CN104141632A (zh) * | 2014-07-25 | 2014-11-12 | 吉首长潭泵业有限公司 | 耐磨合金砂浆泵叶轮及其制造方法 |
CN105275834A (zh) * | 2015-10-27 | 2016-01-27 | 上海华鼓鼓风机有限公司 | 一种低速多级垂直剖分筒型结构的三元流离心鼓风机 |
US10349809B2 (en) | 2017-08-08 | 2019-07-16 | Haier Us Appliance Solutions, Inc. | Pump assembly for a dishwashing appliance |
US10349810B2 (en) | 2017-08-08 | 2019-07-16 | Haier Us Appliance Solutions, Inc. | Pump assembly for a dishwashing appliance |
Also Published As
Publication number | Publication date |
---|---|
DE50009642D1 (de) | 2005-04-07 |
EP1126180B1 (de) | 2005-03-02 |
ATE290169T1 (de) | 2005-03-15 |
EP1126180A3 (de) | 2002-08-14 |
ES2234504T3 (es) | 2005-07-01 |
DE10006983A1 (de) | 2001-08-23 |
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