EP2776722A1 - Centrifugal pump for delivering liquids in a motor vehicle - Google Patents

Centrifugal pump for delivering liquids in a motor vehicle

Info

Publication number
EP2776722A1
EP2776722A1 EP12786960.0A EP12786960A EP2776722A1 EP 2776722 A1 EP2776722 A1 EP 2776722A1 EP 12786960 A EP12786960 A EP 12786960A EP 2776722 A1 EP2776722 A1 EP 2776722A1
Authority
EP
European Patent Office
Prior art keywords
centrifugal pump
gap seal
webs
impeller
cover plate
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
Application number
EP12786960.0A
Other languages
German (de)
French (fr)
Other versions
EP2776722B1 (en
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
Original Assignee
Continental Automotive GmbH
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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2776722A1 publication Critical patent/EP2776722A1/en
Application granted granted Critical
Publication of EP2776722B1 publication Critical patent/EP2776722B1/en
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

  • Centrifugal pump for conveying liquids in a motor vehicle
  • the invention relates to a centrifugal pump for conveying fluids in a motor vehicle having a housing, with an intake passage and an outlet passage in the housing, with a driven, rotatable in the housing impeller, projecting from a support disc of the impeller blades and with a free ends of Blades connecting cover plate and with a gap seal between the cover plate and a cover plate of the opposite housing part of the housing.
  • centrifugal pumps are widely used in today's motor vehicles for pumping water and are known in practice.
  • the intake of the known centrifugal pump is guided to the center of the impeller.
  • the outlet channel adjoins the radially outer periphery of the impeller. Liquid located in the center of the impeller reaches the blades and, upon rotation of the impeller, is conveyed radially outward to the exhaust passage.
  • Between the cover plate having the side of the impeller and the cover plate opposite housing part thus creates a leading from the exhaust passage to the intake passage gap which is sealed by a gap seal.
  • the gap seal is a particularly narrow gap, which throttles the flow from the high-pressure, radially outer side to the low-pressure, radially inner side of the impeller.
  • the throttling has a decisive influence on the efficiency of the centrifugal pump.
  • the gap can not be arbitrarily reduced, because it must be prevented that tolerances of the components can lead to a grinding of the cover plate on the housing part.
  • the invention is based on the problem, a centrifugal pump of the type mentioned so on to form that it has a particularly high efficiency and is particularly inexpensive to manufacture.
  • the centrifugal pump according to the invention has a particularly high efficiency.
  • the webs are particularly easy to manufacture, so that the inventive centrifugal pump also has particularly low production costs.
  • the webs could, for example, each be guided to the middle of the gap seal.
  • it in order to increase the number of deflections and to increase the throttling effect of the gap seal, it contributes, when webs arranged opposite one another, in each case over half the height of the gap seal.
  • the gap seal has a particularly high throttling effect if a plurality of chambers limited by the webs have different cross sections in the gap seal.
  • the different cross sections of the chambers in the gap seal lead to a number of speed changes of the flow, which leads to their throttling.
  • a particularly high throttling effect of the gap seal can be achieved in a simple manner if the gap seal near the intake duct and near the outlet duct respectively has an annular channel arranged perpendicular to the plane of the support disk of the impeller Ring channels are connected to each other via a transverse channel and when the webs protrude into the transverse channel.
  • the components which limit the gap seal can simply be axially inserted and manufactured inexpensively, for example by injection molding. Furthermore, the gap seal is thereby designed stepped, which contributes to a particularly high throttle effect.
  • the webs are contrary to another advantageous development of the invention, the flow in the gap seal when the annular channels interconnecting transverse channel is inclined to the plane of the support disk of the impeller and when the projecting into the transverse channel webs are arranged perpendicular to the plane of the support disk of the impeller.
  • the alignment of the webs to the cross channel creates high turbulences in the flow, so that the gap seal has a particularly high throttling effect. Since the height of the blades to the radially outer boundary of the impeller decreases anyway, this design also leads to a particularly low material usage and thus to very low production costs.
  • the webs can be according to another advantageous embodiment of the invention particularly easy to manufacture in the manufacture of components by injection molding, when the webs to rejuvenate to their free end.
  • the cover plate and housing can be easily manufactured during production by injection molding. This leads, in particular in a production of components in mass production, as is common in motor vehicles, at very low production costs. The production of the webs and thus the generation of the gap seal is thereby cost neutral.
  • At least one of the components of the housing part or the cover plate is made of plastic.
  • Fig. 1 a centrifugal pump according to the invention with adjacent
  • Fig. 2 is a sectional view through a pump stage of
  • FIG. 1 shows a centrifugal pump 1 with a pump stage 3 driven by an electric motor 2.
  • the centrifugal pump 1 sucks in liquid via 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 illustration through the pump stage 3 of the centrifugal pump 1 from FIG. 1.
  • the pump stage 3 has a housing 8 with an impeller 9 rotatably arranged therein and driven by the electric motor 2 from FIG. 1.
  • the housing 8 has one connected to the intake line 4 Intake channel 10 and an outlet channel 11 connected to the feed line 6.
  • the impeller 9 has an on a shaft 12 of the electric motor. 2 rotatably arranged support plate 13 with projecting blades 14. Free ends of radially outer blades 14 are connected to a cover plate 15.
  • a gap seal 17 is arranged between the cover disk 15 and a housing part 16 of the housing opposite the cover disk 15.
  • the gap seal 17 has two concentric with the axis of rotation of the impeller 9 and perpendicular to the support plate 13 arranged annular channels 18, 19. Between the annular channels 18, 19 a first transverse channel 20 is arranged. Furthermore, the gap seal 17 has a second, arranged on the intake passage 10 transverse channel 21. The first transverse channel 20 is inclined to the plane of the support plate 13 is arranged.
  • the cover plate 15 and the cover plate 15 opposite housing part 16 each have in the gap seal 17 projecting and mutually offset webs 22 - 24 on. The webs 22-24 each project beyond half the height of the gap seal 17 and delimit chambers 25, 26 with different cross sections. At the second transverse channel 21, a further chamber 27 of webs 28, 29 of the cover plate 15 and a flat wall of the housing part 16 is limited.

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

Abstract

In a centrifugal pump (1) for delivering liquids in a motor vehicle, annular webs (22 - 24, 28, 29) project into a gap seal (17) between a housing part (16) and a cover disc (16) of a rotor (9). The webs (22 - 24, 28, 29) are arranged on both components of the housing part (16) and of the cover disc (15) and delimit chambers (25 - 27) which accelerate, decelerate and divert a flow. In this way, the gap seal (17) has a high throttling action.

Description

Beschreibung description
Kreiselpumpe zum Fördern von Flüssigkeiten in einem Kraftfahrzeug Centrifugal pump for conveying liquids in a motor vehicle
Die Erfindung betrifft eine Kreiselpumpe zum Fördern von Flüssigkeiten in einem Kraftfahrzeug mit einem Gehäuse, mit einem Ansaugkanal und einem Auslasskanal in dem Gehäuse, mit einem angetriebenen, in dem Gehäuse drehbaren Laufrad, mit von einer Tragscheibe des Laufrades abstehenden Laufschaufeln und mit einer freie Enden von Laufschaufeln verbindenden Deckscheibe und mit einer Spaltdichtung zwischen der Deckscheibe und einem der Deckscheibe gegenüberstehenden Gehäuseteil des Gehäuses. The invention relates to a centrifugal pump for conveying fluids in a motor vehicle having a housing, with an intake passage and an outlet passage in the housing, with a driven, rotatable in the housing impeller, projecting from a support disc of the impeller blades and with a free ends of Blades connecting cover plate and with a gap seal between the cover plate and a cover plate of the opposite housing part of the housing.
Solche Kreiselpumpen werden in heutigen Kraftfahrzeugen häufig zum Fördern von Wasser eingesetzt und sind aus der Praxis bekannt. Der Ansaugkanal der bekannten Kreiselpumpe ist zu dem Zentrum des Laufrades geführt. Der Auslasskanal schließt sich an den radial äußeren Umfang des Laufrades an. Im Zentrum des Laufrades befindliche Flüssigkeit gelangt auf die Laufschaufeln und wird bei einer Drehung des Laufrades radial nach außen zu dem Auslasskanal gefördert. Zwischen der die Deckscheibe aufweisenden Seite des Laufrades und dem der Deckscheibe gegenüberstehenden Gehäuseteil entsteht damit ein von dem Auslasskanal bis zu dem Ansaugkanal führender Spalt, der durch eine Spaltdichtung abgedichtet ist. Im einfachsten Fall ist die Spaltdichtung ein besonders enger Spalt, der die Strömung von der einen hohen Druck aufweisenden, radial äuße- ren Seite zu der einen geringen Druck aufweisenden, radial inneren Seite des Laufrades drosselt. Die Drosselung hat einen entscheidenden Einfluss auf den Wirkungsgrad der Kreiselpumpe. Jedoch lässt sich der Spalt nicht beliebig verkleinern, weil verhindert sein muss, dass Toleranzen der Bauteile zu einem Schleifen der Deckscheibe auf dem Gehäuseteil führen können . Der Erfindung liegt das Problem zugrunde, eine Kreiselpumpe der eingangs genannten Art so weiter zu bilden, dass sie einen besonders hohen Wirkungsgrad hat und besonders kostengünstig zu fertigen ist . Such centrifugal pumps are widely used in today's motor vehicles for pumping water and are known in practice. The intake of the known centrifugal pump is guided to the center of the impeller. The outlet channel adjoins the radially outer periphery of the impeller. Liquid located in the center of the impeller reaches the blades and, upon rotation of the impeller, is conveyed radially outward to the exhaust passage. Between the cover plate having the side of the impeller and the cover plate opposite housing part thus creates a leading from the exhaust passage to the intake passage gap which is sealed by a gap seal. In the simplest case, the gap seal is a particularly narrow gap, which throttles the flow from the high-pressure, radially outer side to the low-pressure, radially inner side of the impeller. The throttling has a decisive influence on the efficiency of the centrifugal pump. However, the gap can not be arbitrarily reduced, because it must be prevented that tolerances of the components can lead to a grinding of the cover plate on the housing part. The invention is based on the problem, a centrifugal pump of the type mentioned so on to form that it has a particularly high efficiency and is particularly inexpensive to manufacture.
Dieses Problem wird erfindungsgemäß dadurch gelöst, dass jeweils zumindest ein hervorstehender ringförmiger Steg der Spaltdichtung auf der Deckscheibe und auf dem Gehäuseteil angeordnet ist und dass der Steg des Gehäuseteils zu dem Steg der Deckscheibe zueinander versetzt ist. This problem is inventively solved in that in each case at least one projecting annular web of the gap seal on the cover plate and on the housing part is arranged and that the web of the housing part is offset from one another to the web of the cover plate.
Durch diese Gestaltung wird eine von dem Ansaugkanal zu dem Auslasskanal führende Strömung in der Spaltdichtung entlang eines besonders langen Weges geführt. Weiterhin erfährt die Strömung hierdurch mehrere Umlenkungen, was zu einer besonders hohen Drosselwirkung der Spaltdichtung führt. Durch die hohe Drosselwirkung der Spaltdichtung hat die erfindungsgemäße Kreiselpumpe einen besonders hohen Wirkungsgrad. Die Stege lassen sich besonders einfach fertigen, so dass die erfin- dungsgemäße Kreiselpumpe zudem besonders geringe Fertigungskosten aufweist. As a result of this design, a flow leading from the intake channel to the outlet channel is guided in the gap seal along a particularly long path. Furthermore, the flow thus experiences several deflections, which leads to a particularly high throttling effect of the gap seal. Due to the high throttling effect of the gap seal, the centrifugal pump according to the invention has a particularly high efficiency. The webs are particularly easy to manufacture, so that the inventive centrifugal pump also has particularly low production costs.
Die Stege könnten beispielsweise jeweils bis zur Mitte der Spaltdichtung geführt sein. Zur Erhöhung der Anzahl der Um- lenkungen und der Erhöhung der Drosselwirkung der Spaltdichtung trägt es jedoch gemäß einer anderen vorteilhaften Weiterbildung der Erfindung bei, wenn einander gegenüberstehend angeordnete Stege jeweils die Hälfte der Höhe der Spaltdichtung überragen. The webs could, for example, each be guided to the middle of the gap seal. However, according to another advantageous development of the invention, in order to increase the number of deflections and to increase the throttling effect of the gap seal, it contributes, when webs arranged opposite one another, in each case over half the height of the gap seal.
Die Spaltdichtung weist gemäß einer vorteilhaften Weiterbildung der Erfindung eine besonders hohe Drosselwirkung auf, wenn mehrere von den Stegen begrenzte Kammern in der Spaltdichtung unterschiedliche Querschnitte aufweisen. Die unter- schiedlichen Querschnitte der Kammern in der Spaltdichtung führen zu mehreren Geschwindigkeitsänderungen der Strömung, was zu deren Drosselung führt. Eine besonders hohe Drosselwirkung der Spaltdichtung bei einer besonders einfachen Herstellung lässt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einfach erreichen, wenn die Spaltdichtung nahe des Ansaugkanals und na- he des Auslasskanal jeweils einen senkrecht zur Ebene der Tragscheibe des Laufrades angeordneten Ringkanal hat, wenn die Ringkanäle über einen Querkanal miteinander verbunden sind und wenn die Stege in den Querkanal hineinragen. Durch diese Gestaltung lassen sich die die Spaltdichtung begrenzen- den Bauteile einfach axial fügen und kostengünstig, beispielsweise im Spritzgussverfahren, fertigen. Weiterhin ist die Spaltdichtung hierdurch gestuft gestaltet, was zu einer besonders hohen Drosselwirkung beiträgt. Die Stege stehen gemäß einer anderen vorteilhaften Weiterbildung der Erfindung der Strömung in der Spaltdichtung entgegen, wenn der die Ringkanäle miteinander verbindende Querkanal zur Ebene der Tragscheibe des Laufrades geneigt ist und wenn die in den Querkanal hineinragenden Stege senkrecht zur Ebene der Tragscheibe des Laufrades angeordnet sind. Durch die Ausrichtung der Stege zum Querkanal entstehen hohe Ver- wirbelungen in der Strömung, so dass die Spaltdichtung eine besonders hohe Drosselwirkung aufweist. Da sich die Höhe der Laufschaufeln zur radial äußeren Begrenzung des Laufrades oh- nehin verringert, führt diese Gestaltung zudem zu einem besonders geringen Materialeinsatz und damit zu besonders geringen Fertigungskosten . According to an advantageous development of the invention, the gap seal has a particularly high throttling effect if a plurality of chambers limited by the webs have different cross sections in the gap seal. The different cross sections of the chambers in the gap seal lead to a number of speed changes of the flow, which leads to their throttling. According to another advantageous development of the invention, a particularly high throttling effect of the gap seal can be achieved in a simple manner if the gap seal near the intake duct and near the outlet duct respectively has an annular channel arranged perpendicular to the plane of the support disk of the impeller Ring channels are connected to each other via a transverse channel and when the webs protrude into the transverse channel. As a result of this design, the components which limit the gap seal can simply be axially inserted and manufactured inexpensively, for example by injection molding. Furthermore, the gap seal is thereby designed stepped, which contributes to a particularly high throttle effect. The webs are contrary to another advantageous development of the invention, the flow in the gap seal when the annular channels interconnecting transverse channel is inclined to the plane of the support disk of the impeller and when the projecting into the transverse channel webs are arranged perpendicular to the plane of the support disk of the impeller. The alignment of the webs to the cross channel creates high turbulences in the flow, so that the gap seal has a particularly high throttling effect. Since the height of the blades to the radially outer boundary of the impeller decreases anyway, this design also leads to a particularly low material usage and thus to very low production costs.
Zur weiteren Erhöhung der Anzahl der Umlenkungen der Strömung und damit der Drosselwirkung in der Spaltdichtung trägt es gemäß einer anderen vorteilhaften Weiterbildung der Erfindung bei, wenn zumindest einer der Ringkanäle über einen Querkanal mit dem Ansaugkanal oder dem Auslasskanal verbunden ist. Die Stege lassen sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung besonders einfach bei der Fertigung der Bauteile im Spritzgussverfahren fertigen, wenn die Stege sich zu ihrem freien Ende hin verjüngen. Durch diese Gestaltung lassen sich Deckscheibe und Gehäuse einfach bei der Fertigung im Spritzgussverfahren fertigen. Dies führt insbesondere bei einer Fertigung der Bauteile in Großserie, wie sie bei Kraftfahrzeugen üblich ist, zu sehr geringen Fertigungskosten. Die Fertigung der Stege und damit die Erzeugung der Spaltdichtung ist hierdurch kostenneutral. To further increase the number of deflections of the flow and thus the throttle effect in the gap seal, it contributes according to another advantageous embodiment of the invention, when at least one of the ring channels is connected via a transverse channel with the intake passage or the outlet channel. The webs can be according to another advantageous embodiment of the invention particularly easy to manufacture in the manufacture of components by injection molding, when the webs to rejuvenate to their free end. Through this design, the cover plate and housing can be easily manufactured during production by injection molding. This leads, in particular in a production of components in mass production, as is common in motor vehicles, at very low production costs. The production of the webs and thus the generation of the gap seal is thereby cost neutral.
Zur weiteren Verringerung der Fertigungskosten der erfin- dungsgemäßen Kreiselpumpe trägt es bei, wenn zumindest eines der Bauteile des Gehäuseteils oder der Deckscheibe aus Kunststoff gefertigt ist. To further reduce the manufacturing costs of the inventive centrifugal pump, it is helpful if at least one of the components of the housing part or the cover plate is made of plastic.
Die Erfindung lässt zahlreiche Ausführungsformen zu. Zur wei- teren Verdeutlichung ihres Grundprinzips ist eine davon in der Zeichnung dargestellt und wird nachfolgend beschrieben. Diese zeigt in: The invention allows numerous embodiments. To further clarify its basic principle, one of them is shown in the drawing and will be described below. This shows in:
Fig. 1 eine erfindungsgemäße Kreiselpumpe mit angrenzenden Fig. 1 a centrifugal pump according to the invention with adjacent
Bauteilen eines Kraftfahrzeuges,  Components of a motor vehicle,
Fig. 2 eine Schnittdarstellung durch eine Pumpenstufe der Fig. 2 is a sectional view through a pump stage of
Kreiselpumpe aus Figur 1. Figur 1 zeigt eine Kreiselpumpe 1 mit einer von einem Elektromotor 2 angetriebenen Pumpenstufe 3. Die Kreiselpumpe 1 saugt Flüssigkeit über eine Ansaugleitung 4 aus einem Vorratsbehälter 5 an und fördert diese über eine Förderleitung 6 zu einem Verbraucher 7.  FIG. 1 shows a centrifugal pump 1 with a pump stage 3 driven by an electric motor 2. The centrifugal pump 1 sucks in liquid via a suction line 4 from a storage container 5 and conveys it via a delivery line 6 to a consumer 7.
Figur 2 zeigt eine Schnittdarstellung durch die Pumpenstufe 3 der Kreiselpumpe 1 aus Figur 1. Die Pumpenstufe 3 hat ein Gehäuse 8 mit einem darin drehbar angeordneten, von dem Elektromotor 2 aus Figur 1 angetriebenen Laufrad 9. Das Gehäuse 8 hat einen mit der Ansaugleitung 4 verbundenen Ansaugkanal 10 und einen mit der Förderleitung 6 verbundenen Auslasskanal 11. Das Laufrad 9 hat eine auf einer Welle 12 des Elektromo- tors 2 drehfest angeordnete Tragscheibe 13 mit davon abstehenden Laufschaufeln 14. Freie Enden radial äußerer Laufschaufeln 14 sind mit einer Deckscheibe 15 verbunden. Zwischen der Deckscheibe 15 und einem der Deckscheibe 15 gegenü- berstehenden Gehäuseteil 16 des Gehäuses ist eine Spaltdichtung 17 angeordnet. FIG. 2 shows a sectional illustration through the pump stage 3 of the centrifugal pump 1 from FIG. 1. The pump stage 3 has a housing 8 with an impeller 9 rotatably arranged therein and driven by the electric motor 2 from FIG. 1. The housing 8 has one connected to the intake line 4 Intake channel 10 and an outlet channel 11 connected to the feed line 6. The impeller 9 has an on a shaft 12 of the electric motor. 2 rotatably arranged support plate 13 with projecting blades 14. Free ends of radially outer blades 14 are connected to a cover plate 15. A gap seal 17 is arranged between the cover disk 15 and a housing part 16 of the housing opposite the cover disk 15.
Die Spaltdichtung 17 weist zwei konzentrisch zur Drehachse des Laufrades 9 und senkrecht zur Tragscheibe 13 angeordnete Ringkanäle 18, 19 auf. Zwischen den Ringkanälen 18, 19 ist ein erster Querkanal 20 angeordnet. Weiterhin hat die Spaltdichtung 17 einen zweiten, an dem Ansaugkanal 10 angeordneten Querkanal 21. Der erste Querkanal 20 ist geneigt zur Ebene der Tragscheibe 13 angeordnet. Die Deckscheibe 15 und das der Deckscheibe 15 gegenüberstehende Gehäuseteil 16 weisen jeweils in die Spaltdichtung 17 hineinragende und zueinander versetzt angeordnete Stege 22 - 24 auf. Die Stege 22 - 24 überragen jeweils die Hälfte der Höhe der Spaltdichtung 17 und begrenzen Kammern 25, 26 mit unterschiedlichen Quer- schnitten. An dem zweiten Querkanal 21 ist eine weitere Kammer 27 von Stegen 28, 29 der Deckscheibe 15 und einer ebenen Wandung des Gehäuseteils 16 begrenzt. The gap seal 17 has two concentric with the axis of rotation of the impeller 9 and perpendicular to the support plate 13 arranged annular channels 18, 19. Between the annular channels 18, 19 a first transverse channel 20 is arranged. Furthermore, the gap seal 17 has a second, arranged on the intake passage 10 transverse channel 21. The first transverse channel 20 is inclined to the plane of the support plate 13 is arranged. The cover plate 15 and the cover plate 15 opposite housing part 16 each have in the gap seal 17 projecting and mutually offset webs 22 - 24 on. The webs 22-24 each project beyond half the height of the gap seal 17 and delimit chambers 25, 26 with different cross sections. At the second transverse channel 21, a further chamber 27 of webs 28, 29 of the cover plate 15 and a flat wall of the housing part 16 is limited.

Claims

Kreiselpumpe (1) zum Fördern von Flüssigkeiten in einem Kraftfahrzeug mit einem Gehäuse (8), mit einem Ansaugka nal (10) und einem Auslasskanal (11) in dem Gehäuse (8) mit einem angetriebenen, in dem Gehäuse (8) drehbaren Laufrad (9), mit von einer Tragscheibe (13) des Laufrades (9) abstehenden Laufschaufeln (14) und mit einer freie Enden von Laufschaufeln (14) verbindenden Deckscheibe (15) und mit einer Spaltdichtung (17) zwischen der Deckscheibe (15) und einem der Deckscheibe (15) gegenüberstehenden Gehäuseteil (16) des Gehäuses (8), d a du r c h g e k e n n z e i c h n e t , dass jeweils zumindest ein hervorstehender, ringförmiger Steg (22 - 24, 28, 29) der Spaltdichtung (17) auf der Deckscheibe (15) und auf dem Gehäuseteil (16) angeordnet ist und dass der Steg (24) des Gehäuseteils (16) zu dem Steg (22, 23) der Deckscheibe (15) zueinander versetzt ist. Centrifugal pump (1) for conveying liquids in a motor vehicle with a housing (8), with a Ansaugka channel (10) and an outlet channel (11) in the housing (8) with a driven, in the housing (8) rotatable impeller ( 9), with a support disc (13) of the impeller (9) projecting blades (14) and with a free ends of blades (14) connecting cover plate (15) and with a gap seal (17) between the cover plate (15) and a the cover disc (15) opposite the housing part (16) of the housing (8), since you rchgekennzeichnet that in each case at least one protruding, annular web (22 - 24, 28, 29) of the gap seal (17) on the cover plate (15) and on the housing part (16) is arranged and that the web (24) of the housing part (16) to the web (22, 23) of the cover plate (15) is offset from each other.
Kreiselpumpe nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass einander gegenüberstehend angeordnete Stege (22 - 24) jeweils die Hälfte der Höhe der Spaltdichtung (17) überragen. A centrifugal pump according to claim 1, wherein a pair of webs (22-24) arranged opposite each other project beyond half of the height of the gap seal (17) in each case.
Kreiselpumpe nach Anspruch 1 oder 2, d a du r c h g e k e n n z e i c h n e t , dass mehrere von den Stegen (22 - 24, 28, 29) begrenzte Kammern (25, 26) in der Spaltdichtung (17) unterschiedliche Querschnitte aufwei sen . A centrifugal pump according to claim 1 or 2, wherein a plurality of chambers (25, 26) bounded by the webs (22 - 24, 28, 29) have different cross-sections in the gap seal (17).
Kreiselpumpe nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t , dass die Spaltdichtung (17) nahe des Ansaugkanals (10) und nahe des Auslasskanal (11) jeweils einen senkrecht zur Ebene der Tragscheibe (13) des Laufrades (9) angeordneten Ringkanal (18, 19) hat, dass die Ringkanäle (18, 19) über ei- nen Querkanal (20) miteinander verbunden sind und dass die Stege (22 - 24) in den Querkanal (20) hineinragen. Centrifugal pump according to one of claims 1 to 3, characterized in that the gap seal (17) near the intake passage (10) and near the outlet channel (11) each one perpendicular to the plane of the support disc (13) of the impeller (9) arranged annular channel (18, 19) has that the annular channels (18, 19) over a NEN transverse channel (20) are interconnected and that the webs (22 - 24) protrude into the transverse channel (20).
5. Kreiselpumpe nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t , dass der die Ringkanäle (18,5. Centrifugal pump according to claim 4, characterized in that the annular channels (18,
19) miteinander verbindende Querkanal (20) zur Ebene der Tragscheibe (13) des Laufrades (9) geneigt ist und dass die in den Querkanal (20) hineinragenden Stege (22 - 24) senkrecht zur Ebene der Tragscheibe (13) des Laufrades (9) angeordnet sind. 19) interconnecting transverse channel (20) to the plane of the support disc (13) of the impeller (9) is inclined and that in the transverse channel (20) projecting webs (22 - 24) perpendicular to the plane of the support disc (13) of the impeller (9 ) are arranged.
6. Kreiselpumpe nach Anspruch 4 oder 5, d a du r c h 6. Centrifugal pump according to claim 4 or 5, d a du r c h
g e k e n n z e i c h n e t , dass zumindest einer der Ringkanäle (18) über einen Querkanal (21) mit dem Ansaugkanal /10) oder dem Auslasskanal (11) verbunden ist.  That at least one of the annular channels (18) via a transverse channel (21) with the intake passage / 10) or the outlet channel (11) is connected.
7. Kreiselpumpe nach einem der Ansprüche 1 bis 6, d a d u r c h g e k e n n z e i c h n e t , dass die Stege (22 - 24, 28, 29) sich zu ihrem freien Ende hin verjüngen . 7. A centrifugal pump according to any one of claims 1 to 6, wherein: said webs (22-24, 28, 29) taper towards their free end.
8. Kreiselpumpe nach einem der Ansprüche 1 bis 7, d a d u r c h g e k e n n z e i c h n e t , dass zumindest eines der Bauteile des Gehäuseteils (16) oder der Deckscheibe (15) aus Kunststoff gefertigt ist. 8. The centrifugal pump according to claim 1, wherein at least one of the components of the housing part (16) or the cover plate (15) is made of plastic.
EP12786960.0A 2011-11-10 2012-11-09 Centrifugal pump for delivering liquids in a motor vehicle Active EP2776722B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011086128A DE102011086128A1 (en) 2011-11-10 2011-11-10 Centrifugal pump for conveying liquids in a motor vehicle
PCT/EP2012/072209 WO2013068512A1 (en) 2011-11-10 2012-11-09 Centrifugal pump for delivering liquids in a motor vehicle

Publications (2)

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

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ID=47178680

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Application Number Title Priority Date Filing Date
EP12786960.0A Active EP2776722B1 (en) 2011-11-10 2012-11-09 Centrifugal pump for delivering liquids in a motor vehicle

Country Status (5)

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

Families Citing this family (2)

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

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Publication number Priority date Publication date Assignee Title
FR386812A (en) * 1907-02-26 1908-06-24 App Rateau Soc D Expl Des Automatic balancing system for rotating machines
DE714290C (en) * 1940-03-18 1941-11-26 Escher Wyss Maschinenfabrik G Single or multi-stage centrifugal machine working with liquid
US2704232A (en) * 1951-08-02 1955-03-15 Johnston Plastic Pump Corp Machine frame connected bearing
CN2311637Y (en) * 1997-08-15 1999-03-24 芜湖造纸网总厂 Two-phase fluid pump
JP4274230B2 (en) * 2006-11-21 2009-06-03 パナソニック電工株式会社 pump
CN200999749Y (en) * 2007-01-12 2008-01-02 上海连成（集团）有限公司 Water pump blade wheel sealing device

Non-Patent Citations (1)

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Title
See references of WO2013068512A1 *

Also Published As

Publication number Publication date
US20150086342A1 (en) 2015-03-26
DE102011086128A1 (en) 2013-05-16
EP2776722B1 (en) 2020-04-01
WO2013068512A1 (en) 2013-05-16
US9765792B2 (en) 2017-09-19
CN104024648B (en) 2017-05-24
CN104024648A (en) 2014-09-03

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