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EP2776722B1 - Pompe centrifuge servant au refoulement de liquides dans un véhicule automobile - Google Patents

Pompe centrifuge servant au refoulement de liquides dans un véhicule automobile Download PDF

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Publication number
EP2776722B1
EP2776722B1 EP12786960.0A EP12786960A EP2776722B1 EP 2776722 B1 EP2776722 B1 EP 2776722B1 EP 12786960 A EP12786960 A EP 12786960A EP 2776722 B1 EP2776722 B1 EP 2776722B1
Authority
EP
European Patent Office
Prior art keywords
centrifugal pump
duct
gap seal
webs
housing
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.)
Active
Application number
EP12786960.0A
Other languages
German (de)
English (en)
Other versions
EP2776722A1 (fr
Inventor
Peter Köppler
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.)
Vitesco Technologies GmbH
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Vitesco Technologies GmbH
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Filing date
Publication date
Application filed by Vitesco Technologies GmbH filed Critical Vitesco Technologies GmbH
Publication of EP2776722A1 publication Critical patent/EP2776722A1/fr
Application granted granted Critical
Publication of EP2776722B1 publication Critical patent/EP2776722B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/08—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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance

Definitions

  • the invention relates to a centrifugal pump for conveying liquids in a motor vehicle with a housing, with an intake duct and an outlet duct in the housing, with a driven impeller which can be rotated in the housing, with rotor blades protruding from a supporting disk of the impeller and with a free ends of Cover disk connecting blades and with a gap seal between the cover disk and a housing part of the housing opposite the cover disk.
  • Centrifugal pumps of this type are frequently used in today's motor vehicles to convey water and are known from practice.
  • the suction channel of the known centrifugal pump is guided to the center of the impeller.
  • the outlet duct connects to the radially outer circumference of the impeller. Liquid located in the center of the impeller reaches the rotor blades and is conveyed radially outwards to the outlet channel when the impeller rotates.
  • a gap is thus created which leads from the outlet channel to the intake channel and is sealed by a gap seal.
  • the gap seal is a particularly narrow gap, which throttles the flow from the radially outer side, which has a high pressure, to the radially inner side, which has a low pressure, of the impeller.
  • the throttling has a decisive influence on the efficiency of the centrifugal pump.
  • the gap cannot be reduced arbitrarily, because it must be prevented that tolerances of the components can lead to grinding of the cover plate on the housing part.
  • a pump is known in which webs and depressions are formed between a pump impeller and a housing section, which act in the sense of a gap seal.
  • the invention is based on the problem of developing a centrifugal pump of the type mentioned at the outset in such a way that it has a particularly high degree of efficiency and can be produced particularly cost-effectively.
  • the centrifugal pump according to the invention has a particularly high efficiency.
  • the webs are particularly easy to manufacture, so that the centrifugal pump according to the invention also has particularly low manufacturing costs.
  • the gap seal has a particularly high throttling effect, if several chambers delimited by the webs have different cross sections in the gap seal.
  • the different cross sections of the chambers in the gap seal lead to several changes in the velocity of the flow, which leads to their throttling.
  • a particularly high throttling effect of the gap seal with a particularly simple manufacture can be achieved according to the invention if the gap seal near the intake duct and near the outlet duct has an annular duct arranged perpendicular to the plane of the supporting disk of the impeller if the annular ducts are connected to one another via a transverse duct and if the webs protrude into the transverse channel.
  • This design allows the components that delimit the gap seal to be simply axially joined and inexpensively manufactured, for example in the injection molding process.
  • the gap seal is designed in a stepped manner, which contributes to a particularly high throttling effect.
  • the webs oppose the flow in the gap seal if the transverse channel connecting the annular channels to one another is inclined to the plane of the supporting disk of the impeller and if the webs projecting into the transverse channel are arranged perpendicular to the plane of the supporting disk of the impeller.
  • the orientation of the webs to the transverse channel creates high turbulence in the flow, so that the gap seal has a particularly high throttling effect. Since the height of the blades for radially outer limitation of the impeller is reduced anyway, this design also leads to a particularly low use of materials and thus to particularly low manufacturing costs.
  • the invention contributes to a further increase in the number of deflections of the flow and thus the throttling action in the gap seal if at least one of the ring channels is connected to the intake channel or the outlet channel via a transverse channel.
  • the webs can be produced particularly easily when the components are manufactured using the injection molding process if the webs taper towards their free end.
  • This design means that the cover plate and housing can be easily manufactured using the injection molding process. This leads to very low manufacturing costs, in particular when the components are mass-produced, as is customary in motor vehicles. The manufacture of the webs and thus the production of the gap seal is therefore cost-neutral.
  • FIG. 1 shows a centrifugal pump 1 with a pump stage 3 driven by an electric motor 2.
  • the centrifugal pump 1 draws liquid through a suction line 4 from a storage container 5 and conveys it via a delivery line 6 to a consumer 7.
  • FIG 2 shows a sectional view through the pump stage 3 of the centrifugal pump 1 Figure 1 .
  • the pump stage 3 has a housing 8 with a rotatably arranged therein from the electric motor 2 Figure 1 driven impeller 9.
  • the housing 8 has an intake duct 10 connected to the intake duct 4 and an outlet duct 11 connected to the feed duct 6.
  • the impeller 9 has one on a shaft 12 of the electric motor 2 rotatably arranged support disk 13 with blades 14 projecting therefrom. Free ends of radially outer blades 14 are connected to a cover disk 15.
  • a gap seal 17 is arranged between the cover plate 15 and a housing part 16 of the housing opposite the cover plate 15.
  • the gap seal 17 has two ring channels 18, 19 arranged concentrically to the axis of rotation of the impeller 9 and perpendicular to the support disk 13.
  • a first transverse channel 20 is arranged between the ring channels 18, 19.
  • the gap seal 17 has a second transverse duct 21 arranged on the intake duct 10.
  • the first transverse duct 20 is arranged inclined to the plane of the support disk 13.
  • the cover plate 15 and the housing part 16 opposite the cover plate 15 each have webs 22-24 which protrude into the gap seal 17 and are offset from one another.
  • the webs 22-24 each protrude half the height of the gap seal 17 and delimit chambers 25, 26 with different cross sections.
  • On the second transverse channel 21, a further chamber 27 is delimited by webs 28, 29 of the cover plate 15 and a flat wall of the housing part 16.

Landscapes

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

Claims (6)

  1. Pompe centrifuge (1) destinée à transporter des liquides dans un véhicule automobile, ladite pompe centrifuge comprenant un boîtier (8), un conduit d'admission (10) et un conduit de sortie (11) placés dans le boîtier (8), un rotor (9) entraîné pouvant tourner dans le boîtier (8), des pales (14) faisant saillie d'un disque de support (13) du rotor (9) et un disque de recouvrement (15) reliant des extrémités libres de pales (14) et une boîte à labyrinthe (17) placée entre le disque de recouvrement (15) et une partie (16) du boîtier (8) opposée au disque de recouvrement (15), au moins une nervure annulaire saillante (22 - 24, 28, 29) de la boîte à labyrinthe (17) étant disposée sur le disque de recouvrement (15) et sur la partie de boîtier (16) et la nervure (24) de la partie de boîtier (16) étant décalée de la nervure (22, 23) du disque de recouvrement (15), la boîte à labyrinthe (17) comportant à chaque fois près du conduit d'admission (10) et près du conduit de sortie (11) un conduit annulaire (18, 19) disposé perpendiculairement au plan du disque de support (13) du rotor (9), les conduits annulaires (18, 19) étant reliés l'un à l'autre par un conduit transversal (20) et les nervures (22 - 24) faisant saillie dans le conduit transversal (20), caractérisée en ce que des nervures (22 - 24) disposées en vis-à-vis font saillie chacune sur la moitié de la hauteur de la boîte à labyrinthe (17).
  2. Pompe centrifuge selon la revendication 1, caractérisée en ce qu'une pluralité de chambres (25, 26), délimitées par les nervures (22 - 24, 28, 29), dans la boîte à labyrinthe (17) ont des sections transversales différentes.
  3. Pompe centrifuge selon la revendication 1 ou 2, caractérisée en ce que le conduit transversal (20) reliant les conduits annulaires (18, 19) entre eux est incliné par rapport au plan du disque de support (13) du rotor (9) et en ce que les nervures (22 - 24) saillant dans le conduit transversal (20) sont disposées perpendiculairement au plan du disque de support (13) du rotor (9).
  4. Pompe centrifuge selon l'une des revendications précédentes, caractérisée en ce que l'un au moins des conduits annulaires (18) est relié au conduit d'admission (10) ou au conduit de sortie (11) par un conduit transversal (21).
  5. Pompe centrifuge selon l'une des revendications précédentes, caractérisée en ce que les nervures (22 - 24, 28, 29) se rétrécissent vers leur extrémité libre.
  6. Pompe centrifuge selon l'une des revendications précédentes, caractérisée en ce que l'un au moins des composants de la partie de boîtier (16) ou du disque de recouvrement (15) est en matière synthétique.
EP12786960.0A 2011-11-10 2012-11-09 Pompe centrifuge servant au refoulement de liquides dans un véhicule automobile Active EP2776722B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011086128A DE102011086128A1 (de) 2011-11-10 2011-11-10 Kreiselpumpe zum Fördern von Flüssigkeiten in einem Kraftfahrzeug
PCT/EP2012/072209 WO2013068512A1 (fr) 2011-11-10 2012-11-09 Pompe centrifuge servant au refoulement de liquides dans un véhicule automobile

Publications (2)

Publication Number Publication Date
EP2776722A1 EP2776722A1 (fr) 2014-09-17
EP2776722B1 true EP2776722B1 (fr) 2020-04-01

Family

ID=47178680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12786960.0A Active EP2776722B1 (fr) 2011-11-10 2012-11-09 Pompe centrifuge servant au refoulement de liquides dans un véhicule automobile

Country Status (5)

Country Link
US (1) US9765792B2 (fr)
EP (1) EP2776722B1 (fr)
CN (1) CN104024648B (fr)
DE (1) DE102011086128A1 (fr)
WO (1) WO2013068512A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109306967A (zh) * 2017-07-28 2019-02-05 深圳市美好创亿医疗科技有限公司 风机
GB2568715B (en) 2017-11-24 2020-02-26 Jaguar Land Rover Ltd Pump assembly with tortuous flow path

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE714290C (de) * 1940-03-18 1941-11-26 Escher Wyss Maschinenfabrik G Mit Fluessigkeit arbeitende ein- oder mehrstufige Kreiselmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR386812A (fr) * 1907-02-26 1908-06-24 App Rateau Soc D Expl Des Système d'équilibrage automatique pour machines rotatives
US2704232A (en) * 1951-08-02 1955-03-15 Johnston Plastic Pump Corp Machine frame connected bearing
CN2311637Y (zh) 1997-08-15 1999-03-24 芜湖造纸网总厂 二相流泵
JP4274230B2 (ja) * 2006-11-21 2009-06-03 パナソニック電工株式会社 ポンプ
CN200999749Y (zh) 2007-01-12 2008-01-02 上海连成（集团）有限公司 一种新型水泵叶轮密封装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE714290C (de) * 1940-03-18 1941-11-26 Escher Wyss Maschinenfabrik G Mit Fluessigkeit arbeitende ein- oder mehrstufige Kreiselmaschine

Also Published As

Publication number Publication date
DE102011086128A1 (de) 2013-05-16
US9765792B2 (en) 2017-09-19
US20150086342A1 (en) 2015-03-26
CN104024648B (zh) 2017-05-24
EP2776722A1 (fr) 2014-09-17
WO2013068512A1 (fr) 2013-05-16
CN104024648A (zh) 2014-09-03

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