EP1431585A1 - Pumpe, insbesondere für ein wasserführendes Haushaltsgerät - Google Patents
Pumpe, insbesondere für ein wasserführendes Haushaltsgerät Download PDFInfo
- Publication number
- EP1431585A1 EP1431585A1 EP03028454A EP03028454A EP1431585A1 EP 1431585 A1 EP1431585 A1 EP 1431585A1 EP 03028454 A EP03028454 A EP 03028454A EP 03028454 A EP03028454 A EP 03028454A EP 1431585 A1 EP1431585 A1 EP 1431585A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- wall
- chamber
- radial
- sealing ring
- 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
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
-
- 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
Definitions
- the invention relates to a pump with a pump chamber and one in a wall of the pump chamber by means of a first radial shaft sealing ring mounted drive shaft for pumping of a liquid medium in the pump chamber rotating impeller.
- Such pumps are generally known and come for. B. as Submersible pumps or in water-bearing household appliances, such as in a Washing machine or in a dishwasher.
- this object is at the beginning of a pump mentioned type in that at least a second radial shaft sealing ring is present, which is located on the first radial shaft seal connects, with between the two radial shaft seals a chamber surrounding the drive shaft is present is also in the wall of the pump housing is introduced.
- An advantage of the invention is that the sealing arrangement is free of forces in the axial direction of the pump shaft. There are only radial forces, if according to the invention the sealing rings are press-fitted into the wall.
- the Seals there is between the Seals a chamber that is at least temporarily liquid Medium such as B. oil, fat, an emulsion or a other suitable lubricants and / or a gas or a Gas mixture, e.g. B. in particular air is filled. Due to the Compressibility of the gas / gas mixture are the sealing rings against pushable against each other, and the whole structure has a high elasticity, which z. B. to reduce vibrations of the pump structure ("quenching").
- liquid Medium such as B. oil, fat, an emulsion or a other suitable lubricants and / or a gas or a Gas mixture, e.g. B. in particular air is filled. Due to the Compressibility of the gas / gas mixture are the sealing rings against pushable against each other, and the whole structure has a high elasticity, which z. B. to reduce vibrations of the pump structure ("quenching").
- the pump is constructed in such a way that a third radial shaft sealing ring is present, which adjoins the second sealing ring to form a chamber surrounding the shaft and is likewise introduced into the wall of the pump housing.
- This further increases the elasticity of the seal. Even if the sealing lip of a sealing ring is worn, a good seal of the pump chamber from the surroundings is still guaranteed, because the second or the third sealing lip still ensure an adequate sealing of the pump shaft.
- An advantageous construction of the seal is obtained if the sealing rings each have an essentially disk-shaped wall that extends in the radial direction with respect to the shaft.
- the sealing rings are each one in the radial direction extending wall have adjoining wall in the axial direction, which each form a ring.
- the pump in which the chamber between the first and second radial shaft seals at least partially by one at least temporarily liquid medium is filled.
- the liquid medium ensures a reduction in the friction of the shaft in the bearing in the wall.
- a fat especially one as food approved and at least in the hot run, d. H. when heating up and circulating the rinsing liquid at least partially liquefying Fat, used.
- Used grease which after pumping out the rinsing liquid at the end of a washing program and in the switched off state the dishwasher gradually hardens again and from at least partially liquid state changes into a solid state.
- the assembly process is simplified introducing the lubricant into at least one Chamber formed by the radial shaft seal arrangement.
- the pump is used with food-approved grease also for use in household appliances with food come into contact, particularly suitable.
- a pump in which the sealing rings each have an advantage is advantageous sealing lip on the shaft at an acute angle have, which protrudes from the axial wall.
- the sealing lip on the shaft for example from a Standard steel exists, is applied, there is little friction caused.
- a ...- steel with the designation ... selected is among the steels for manufacturing the shaft of the pump a ...- steel with the designation ... selected.
- This steel combines the advantageous properties of magnetizability, corrosion resistance and hardenability, The property of magnetizability is particularly noteworthy the wave, which is due to the yoke magnetization of the Motor directly influences the pump.
- a corrosion free Material is also due to the abrasive alkali attack of the rinsing liquid indispensable on the shaft.
- the sealing lips each have a shape that is also used with a grease scraper or oil scraper rings, e.g. Oil wiper chamfer ring is used.
- Radial shaft seals can be used with advantage. Any material can be used for the radial shaft seals Use elastic material, for example an elastic one Plastic, but especially rubber, for example Polyacrylonitrile-butadiene (NBR). Preferably be for all sealing rings used the same material. however can be used for the sealing ring, which is arranged to the inside of the pump chamber is, d. H. the wear sealing ring, also a higher quality one Material can be used. It has through laboratory tests advocate increasing the life of the entire pump assembly proven to be cheap, a material combination of ... for select the shaft and ... for the radial shaft seals.
- NBR Polyacrylonitrile-butadiene
- the invention also relates to a water-bearing household appliance with an arrangement of sealing rings that are formed are, as described above using the pump.
- a seal structure is used, for example for the drain pump of a washing machine or for the drain pump or the circulation pump in a dishwasher.
- the seal structure can also be used for the storage of the Drive shaft of a laundry drum in the tub one Use the washing machine.
- a pump (Fig. 1 to 4) with a substantially cylindrical
- the structure of the pump chamber has one completely enclosing wall.
- the wall includes one Front wall 2 with a (not shown here) jacket wall is sealingly connected, for example by welding or a screw connection.
- a sealing ring 3 for sealing between the end wall 2 and the jacket wall also a sealing ring 3 to be available.
- the end wall 2 has a central flange 4 through which centrally a drive shaft 5 for driving a conveyor blades 6 having pump wheel 7 passes.
- sealing rings 8, 9, 10 stored in the flange 4, the height of which corresponds to the height the radial shaft seal formed by the sealing rings 8, 9, 10 is trained.
- the sealing rings 8, 9, 10 are on their On the inside of the outer casing wall of the drive shaft 5, while on its outside on an inner wall 40 of the Apply flange 4.
- the sealing rings 8, 9, 10 each extending in the radial direction Wall 120, 121 and 122 and an adjoining and in the axial direction extending wall 130, 131 and 132, so that the walls 120, 121, 122; 130, 131, 132 one essentially L-shaped cross section.
- sealing lip 140, 141, 142 attached to the drive shaft 5 projecting in one piece.
- the sealing lips 140, 141, 142 each protrude from the jacket wall the drive shaft 5 and are in with this Contact that the sealing lips 140, 141, 142 have a large contact surface with drive shaft 5.
- the essentially V-shaped cross sections of the sealing lips 140, 141, 142 each have a leg on the pump chamber side that forms an obtuse angle with the outer wall of the drive shaft, while the flange-side legs form an acute angle with the outer wall of the drive shaft 5.
- the drive shaft has a very smooth surface on its contact surface for the sealing lips and is preferably plunge-cut, ie the surface does not promote the microscopic range ( ⁇ range).
- the sealing rings 8, 9, 10 On its side facing the inner wall 40 of the flange 4 have the sealing rings 8, 9, 10 each with small depressions 160 alternating surveys 161, which ensure that the sealing rings 8, 9, 10 slightly in the area between the Inner wall 40 and the outer wall of the drive shaft 5 into it let it slide without tilting and practice a sealing function to the inner wall.
- the sealing rings 8, 9, 10 also have below the walls 130, 131, 132 have projections 170, 171, 172, respectively, with corresponding ones Projections 180, 181, 182 on top of each neighboring sealing rings 8, 9, 10 cooperate.
- the spaces are preferably selected such that the Interaction of the protrusions 170, 181 a substantially hermetic Completion of the lying between the sealing rings 8, 9, 10 Cavities or chambers 20, 21 is created.
- the chambers 20, 21 are either with air, with a gas or at least partially with an at least temporarily liquid medium, d.
- suitable lubricant preferably with a food-compatible fat, which is in the warm run the dishwasher is at least partially liquefied, filled.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Ein vorteilhafter Aufbau der Dichtung ergibt sich, wenn die Dichtringe jeweils eine sich, bezogen auf die Welle, in radialer Richtung erstreckende, im wesentlichen scheibenförmige Wand, aufweisen.
- Fig. 1
- eine perspektivische Ansicht eines Pumpenrades und eine stirnseitige Wandung einer Pumpenkammer;
- Fig. 2
- eine Seitenansicht des Pumpenrades und der stirnseitigen Wandung einer Pumpenkammer und einer Welle, über die das Pumpenrad in der Pumpenkammer gelagert ist;
- Fig. 3
- eine perspektivische Schnittansicht gemäß einer Linie III - III von Fig. 2;
- Fig. 4
- eine seitliche Schnittansicht gemäß der Linie III - III
von Fig. 2;
und - Fig. 5
- eine Schnittansicht (ausschnittweise) in radialer Richtung einer Dichtungsanordnung
Claims (10)
- Pumpe mit einer Pumpenkammer und einer in einer Wandung (2) der Pumpenkammer mittels eines ersten Radialwellendichtrings (8) gelagerten Antriebswelle (5) zum Pumpen eines liquiden Mediums über ein sich in der Pumpenkammer drehendes Pumpenrad (7), dadurch gekennzeichnet, dass wenigstens ein zweiter Radialwellendichtring (9) vorhanden ist, der sich an den ersten Radialwellendichtring (8) anschließt, wobei zwischen den beiden Radialwellendichtringen (8, 9) eine die Antriebswelle (5) umgebende Kammer (20) vorhanden ist, die ebenfalls in der Wandung (2) der Pumpenkammer eingebracht ist.
- Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass ein dritter Radialwellendichtring (10) vorhanden ist, der sich unter Ausbildung einer die Antriebswelle (5) umgebenden Kammer (21) an den zweiten Dichtring (9) anschließt und ebenfalls in der Wandung (2) des Pumpengehäuses eingebracht ist.
- Pumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Dichtringe (8, 9, 10) jeweils eine sich, bezogen auf die Antriebswelle (5), in radialer Richtung erstreckende, im wesentlichen scheibenförmige Wand (120, 121, 122) aufweisen.
- Pumpe nach Anspruch 3, dadurch gekennzeichnet, dass die Dichtringe (8, 9, 10) jeweils eine sich an die in radialer Richtung erstreckende Wand (120, 121, 122) anschließende Wand (130, 131, 132) in axialer Richtung aufweisen, die jeweils einen Ring bilden.
- Pumpe nach Anspruch 4, dadurch gekennzeichnet, dass die a-xialen Wände (130, 131, 132) der Dichtringe (8, 9, 10) unter Ausbildung der Kammern (20, 21) aneinander anliegen.
- Pumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Kammer (20) zwischen dem ersten und dem zweiten Radialwellendichtring (8, 9) und/oder die Kammer (21) zwischen dem zweiten und dritten Radialwellendichtring (9, 10) wenigstens teilweise von einem wenigstens zeitweise flüssigen Medium ausgefüllt ist.
- Pumpe nach Anspruch 6, dadurch gekennzeichnet, dass das Medium ein wenigstens sich teilverflüssigendes Fett, insbesondere ein als Lebensmittel zugelassenes, dünnflüssiges Öl, ist.
- Pumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Radialwellendichtringe (8, 9, 10) jeweils eine unter einem spitzen Winkel an der Antriebswelle (5) anliegende Dichtlippe (140, 141, 142) aufweisen, die aus der axialen Wand vorspringt.
- Pumpe nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Radialwellendichtringe (8, 9, 10) aus ... bestehen und die Antriebswelle (5) aus einem ... besteht.
- Wasserführendes Haushaltgerät mit einer Pumpe nach einem der Ansprüche 1 bis 9.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002161160 DE10261160A1 (de) | 2002-12-20 | 2002-12-20 | Pumpe, insbesondere für ein wasserführendes Haushaltgerät |
DE10261160 | 2002-12-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1431585A1 true EP1431585A1 (de) | 2004-06-23 |
EP1431585B1 EP1431585B1 (de) | 2006-03-01 |
Family
ID=32336609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20030028454 Revoked EP1431585B1 (de) | 2002-12-20 | 2003-12-12 | Pumpe, insbesondere für ein wasserführendes Haushaltsgerät |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1431585B1 (de) |
DE (2) | DE10261160A1 (de) |
ES (1) | ES2259401T3 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019126971A1 (de) * | 2019-10-08 | 2021-04-08 | Nidec Gpm Gmbh | Dampfleckagen-Kompaktdichtung |
DE102020105781A1 (de) | 2020-03-04 | 2021-09-09 | Nidec Gpm Gmbh | Wasserpumpenlagereinheit mit Dichtungsanordnung sowie damit ausgerüstete Wasserpumpe |
DE102020105771A1 (de) | 2020-03-04 | 2021-09-09 | Nidec Gpm Gmbh | Wasserpumpenlagereinheit mit sperrfluid-schmierstoff sowie damit ausgerüstete wasserpumpe |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1011283B (de) * | 1954-06-23 | 1957-06-27 | Usines Jean Gallay Sa Des | Abdichtungseinrichtung fuer die Antriebswelle einer Zentrifugalpumpe zum Umwaelzen der Waschfluessigkeit in einer Waschmaschine |
FR67549E (fr) * | 1955-02-08 | 1958-03-13 | Thomson Houston Comp Francaise | Pompe centrifuge perfectionnée à palettes |
DE2021775A1 (de) * | 1969-05-05 | 1970-11-12 | Vogel Pumpen | Wellendurchfuehrung fuer Kreiselpumpen und aehnliche Arbeitsmaschinen |
DE4223544A1 (de) * | 1992-07-17 | 1994-01-20 | Kaco Gmbh Co | Pumpe, insbesondere Wasserpumpe, für Kraftfahrzeuge |
DE19639928A1 (de) * | 1995-09-29 | 1997-04-10 | Aisin Seiki | Wasserpumpe |
CA2288230A1 (en) * | 1999-10-27 | 2001-04-27 | Thomas Wilson Ramsay | Multiple lip seal cartridge and adjustable sleeve |
-
2002
- 2002-12-20 DE DE2002161160 patent/DE10261160A1/de not_active Withdrawn
-
2003
- 2003-12-12 ES ES03028454T patent/ES2259401T3/es not_active Expired - Lifetime
- 2003-12-12 EP EP20030028454 patent/EP1431585B1/de not_active Revoked
- 2003-12-12 DE DE50302518T patent/DE50302518D1/de not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1011283B (de) * | 1954-06-23 | 1957-06-27 | Usines Jean Gallay Sa Des | Abdichtungseinrichtung fuer die Antriebswelle einer Zentrifugalpumpe zum Umwaelzen der Waschfluessigkeit in einer Waschmaschine |
FR67549E (fr) * | 1955-02-08 | 1958-03-13 | Thomson Houston Comp Francaise | Pompe centrifuge perfectionnée à palettes |
DE2021775A1 (de) * | 1969-05-05 | 1970-11-12 | Vogel Pumpen | Wellendurchfuehrung fuer Kreiselpumpen und aehnliche Arbeitsmaschinen |
DE4223544A1 (de) * | 1992-07-17 | 1994-01-20 | Kaco Gmbh Co | Pumpe, insbesondere Wasserpumpe, für Kraftfahrzeuge |
DE19639928A1 (de) * | 1995-09-29 | 1997-04-10 | Aisin Seiki | Wasserpumpe |
CA2288230A1 (en) * | 1999-10-27 | 2001-04-27 | Thomas Wilson Ramsay | Multiple lip seal cartridge and adjustable sleeve |
Also Published As
Publication number | Publication date |
---|---|
DE50302518D1 (de) | 2006-04-27 |
EP1431585B1 (de) | 2006-03-01 |
DE10261160A1 (de) | 2004-07-08 |
ES2259401T3 (es) | 2006-10-01 |
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