EP0664394B1 - Fluid delivery device with a ceramic internal gear pump - Google Patents

Fluid delivery device with a ceramic internal gear pump Download PDF

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Publication number
EP0664394B1
EP0664394B1 EP95100332A EP95100332A EP0664394B1 EP 0664394 B1 EP0664394 B1 EP 0664394B1 EP 95100332 A EP95100332 A EP 95100332A EP 95100332 A EP95100332 A EP 95100332A EP 0664394 B1 EP0664394 B1 EP 0664394B1
Authority
EP
European Patent Office
Prior art keywords
pinion
internal
ceramic material
gear pump
conveying unit
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.)
Expired - Lifetime
Application number
EP95100332A
Other languages
German (de)
French (fr)
Other versions
EP0664394A1 (en
Inventor
Diedrich Von Behr
Gerald Kalbe
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.)
Cerasiv GmbH Innovatives Keramik Engineering
Original Assignee
Cerasiv GmbH Innovatives Keramik Engineering
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 Cerasiv GmbH Innovatives Keramik Engineering filed Critical Cerasiv GmbH Innovatives Keramik Engineering
Publication of EP0664394A1 publication Critical patent/EP0664394A1/en
Application granted granted Critical
Publication of EP0664394B1 publication Critical patent/EP0664394B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/20—Manufacture essentially without removing material
    • F04C2230/22—Manufacture essentially without removing material by sintering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0804—Non-oxide ceramics
    • F05C2203/0813—Carbides
    • F05C2203/0817—Carbides of silicon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0865—Oxide ceramics
    • F05C2203/0869—Aluminium oxide

Definitions

  • the invention relates to a conveyor unit according to the preamble of claim 1.
  • WO 92/15 785 A1 describes a delivery unit for delivering liquids known in which the pump unit is an internal gear pump.
  • This internal gear pump also known as a gerotor
  • the bearing journal and with it the inner pinion is driven by a motor.
  • Between the pinion and the race is an outer pinion, which is from the inner pinion is also rotated.
  • the internal sprocket is equipped with one tooth less than the outer pinion, so that a pumping effect occurs. All parts of the internal gear pump, such as the race, inner pinion and outer pinion are made of metal.
  • a conveyor assembly is shown in EP 0 464 261 A1, in particular for conveying of fuel, with an electric drive motor and a coupled one Pump unit (gerotor), which is a base plate, an intermediate plate with a Recess for the circumferential pump parts and a cover includes.
  • gerotor which is a base plate, an intermediate plate with a Recess for the circumferential pump parts and a cover includes.
  • the base plate and the lid are made of a ceramic material, wherein the end faces of the base plate facing the intermediate plate and of the lid have ground surfaces.
  • the invention has for its object a conveyor unit according to the preamble of claim 1 to be quieter and corrosion-resistant. Further the conveyor unit should have a lower weight.
  • this object is achieved in that all parts of the internal gear pump, d. H. Race, inner pinion and outer pinion from a ceramic Material exist, the surface of the tooth contours of the internal pinion and of the outer pinion after its production from the natural sintered skin of the ceramic Material is built up.
  • a method for producing a conveyor assembly according to the invention for Pumping liquids is characterized in that for the production of all Parts of the internal gear pump, d. H. Race, inner sprocket and outer sprocket, a ceramic Material is used, and the surface of the tooth contours of the Inner pinion and the outer pinion is constructed so that these after manufacture have a natural sinter skin and thus a uniform surface structure.
  • the surfaces of the tooth contours advantageously become running properties of the inner pinion and the outer pinion by typical contour-shaping processes, such as B. finished pressing or injection molding, so that advantages the natural sintered skin can be fully used with ceramic materials, like the even surface structure. A grinding process would run and Significantly deteriorate noise properties.
  • the ceramic material is aluminum oxide or silicon carbide. Of course, all alloys are also included here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Description

Die Erfindung betrifft ein Förderaggregat nach dem Oberbegriff des Anspruchs 1.The invention relates to a conveyor unit according to the preamble of claim 1.

Aus der WO 92/15 785 A1 ist ein Förderaggregat zum Fördern von Flüssigkeiten bekannt, bei dem die Pumpeneinheit eine Innenzahnradpumpe ist. Diese Innenzahnradpumpe (auch als Gerotor bezeichnet) besteht aus einem Laufring, in dem ein Innenritzel auf einem Lagerzapfen drehbar angeordnet ist. Der Lagerzapfen und mit ihm das Innenritzel wird von einem Motor angetrieben. Zwischen dem Innenritzel und dem Laufring ist ein Außenritzel angeordnet, welches vom Innenritzel mitgedreht wird. Das Innenritzel ist mit einem Zahn weniger ausgestattet als das Außenritzel, so daß eine Pumpwirkung eintritt. Sämtliche Teile der Innenzahnradpumpe, wie Laufring, Innenritzel und Außenritzel bestehen aus Metall.WO 92/15 785 A1 describes a delivery unit for delivering liquids known in which the pump unit is an internal gear pump. This internal gear pump (also known as a gerotor) consists of a race in which an inner pinion is rotatably arranged on a bearing journal. The bearing journal and with it the inner pinion is driven by a motor. Between the pinion and the race is an outer pinion, which is from the inner pinion is also rotated. The internal sprocket is equipped with one tooth less than the outer pinion, so that a pumping effect occurs. All parts of the internal gear pump, such as the race, inner pinion and outer pinion are made of metal.

In der genannten WO 92/15 785 A1 sind zumindest Teile des mehrteilig aufgebauten Pumpengehäuses aus einem keramischen Werkstoff hergestellt. Hierdurch soll die Geräuschbildung gemindert werden.In WO 92/15 785 A1, at least parts of the multi-part structure are shown Pump housing made of a ceramic material. Hereby noise should be reduced.

In der EP 0 464 261 A1 ist ein Förderaggregat gezeigt, insbesondere zum Fördern von Kraftstoff, mit einem elektrischen Antriebsmotor und einer damit gekoppelten Pumpeneinheit (Gerotor), die eine Grundplatte, eine Zwischenplatte mit einer Ausnehmung für die umlaufenden Pumpenteile und einen Deckel umfaßt. Hierbei besteht zumindest die Grundplatte und der Deckel aus einem keramischen Material, wobei die der Zwischenplatte zugewandten Stirnseiten der Grundplatte und des Deckels geschliffene Oberflächen aufweisen.A conveyor assembly is shown in EP 0 464 261 A1, in particular for conveying of fuel, with an electric drive motor and a coupled one Pump unit (gerotor), which is a base plate, an intermediate plate with a Recess for the circumferential pump parts and a cover includes. Here at least the base plate and the lid are made of a ceramic material, wherein the end faces of the base plate facing the intermediate plate and of the lid have ground surfaces.

Der Erfindung liegt die Aufgabe zugrunde, ein Förderaggregat nach dem Oberbegriff des Anspruchs 1 geräuschärmer und korrosionsbeständig auszubilden. Ferner soll das Förderaggregat ein geringeres Gewicht aufweisen. The invention has for its object a conveyor unit according to the preamble of claim 1 to be quieter and corrosion-resistant. Further the conveyor unit should have a lower weight.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß alle Teile der Innenzahnradpumpe, d. h. Laufring, Innenritzel und Außenritzel aus einem keramischen Werkstoff bestehen, wobei die Oberfläche der Zahnkonturen des Innenritzels und des Außenritzels nach ihrer Herstellung aus der natürlichen Sinterhaut des keramischen Werkstoffes aufgebaut ist.According to the invention, this object is achieved in that all parts of the internal gear pump, d. H. Race, inner pinion and outer pinion from a ceramic Material exist, the surface of the tooth contours of the internal pinion and of the outer pinion after its production from the natural sintered skin of the ceramic Material is built up.

Ein Verfahren zur Herstellung eines erfindungsgemäßen Förderaggregats zum Fördern von Flüssigkeiten zeichnet sich dadurch aus, daß zur Herstellung aller Teile der Innenzahnradpumpe, d. h. Laufring, Innenritzel und Außenritzel, ein keramischer Werkstoff verwendet wird, und die Oberfläche der Zahnkonturen des Innenritzels und des Außenritzels so aufgebaut wird, daß diese nach der Herstellung eine natürliche Sinterhaut und damit gleichmäßige Oberflächenstruktur aufweisen.A method for producing a conveyor assembly according to the invention for Pumping liquids is characterized in that for the production of all Parts of the internal gear pump, d. H. Race, inner sprocket and outer sprocket, a ceramic Material is used, and the surface of the tooth contours of the Inner pinion and the outer pinion is constructed so that these after manufacture have a natural sinter skin and thus a uniform surface structure.

Durch die Verwendung von keramischen Teilen in der Innenzahnradpumpe ist das Förderaggregat nicht nur wesentlich geräuschärmer, sondern auch korrosionsbeständig gegenüber den zu fördernden Medien. Geräusche stören besonders dann, wenn die Pumpe vorteilhafterweise in einem Kraftfahrzeug zum Fördern von Kraftstoff aus einem Vorratstank zum Motor verwendet wird, da hier die Geräusche über den Kraftstofftank und/oder die Fahrzeugkarosserie verstärkt werden.This is due to the use of ceramic parts in the internal gear pump Conveyor unit not only much quieter, but also corrosion-resistant towards the media to be funded. Noises are particularly annoying if the pump is advantageously used in a motor vehicle to convey Fuel from a storage tank is used to the engine because of the noise be reinforced via the fuel tank and / or the vehicle body.

Erfindungsgemäß bestehen alle Teile der Innenzahnradpumpe, d. h. Laufring, Innenritzel und Außenritzel aus einem keramischen Werkstoff. Hierbei ergibt sich eine Gewichtsersparnis gegenüber einer Innenzahnradpumpe aus Metall von ungefähr 40 %.According to the invention, all parts of the internal gear pump, i. H. Race, inner pinion and outer pinion made of a ceramic material. This results in a weight saving compared to an internal gear pump made of metal of approximately 40%.

Zur weiteren wesentlichen Erniedrigung der Geräusche und Verbesserung der Laufeigenschaften werden vorteilhafterweise die Oberflächen der Zahnkonturen des Innenritzels und des Außenritzels durch typische konturnahe Formgebungsverfahren, wie z. B. Fertigpressen oder Spritzgießen hergestellt, so daß Vorteile der natürlichen Sinterhaut bei keramischen Werkstoffen voll genutzt werden können, wie die gleichmäßige Oberflächenstruktur. Ein Schleifprozeß würde die Lauf- und Geräuscheigenschaften signifikant verschlechtern.To further significantly reduce the noise and improve the The surfaces of the tooth contours advantageously become running properties of the inner pinion and the outer pinion by typical contour-shaping processes, such as B. finished pressing or injection molding, so that advantages the natural sintered skin can be fully used with ceramic materials, like the even surface structure. A grinding process would run and Significantly deteriorate noise properties.

In bevorzugter Ausführungsform ist der keramischen Werkstoff Aluminiumoxid oder Siliziumkarbid. Selbstverständlich sind hier auch alle Legierungen mit einbezogen.In a preferred embodiment, the ceramic material is aluminum oxide or silicon carbide. Of course, all alloys are also included here.

Claims (6)

  1. Conveying unit for conveying liquids, having an internal gear pump as a pumping unit, and a bearing race in which a driven internal pinion is arranged on a bearing journal, with the internal pinion entraining an external pinion arranged between the internal pinion and the bearing race by way of a toothing and the internal pinion having one tooth less than the external pinion, as a result of which a pumping action occurs, characterised in that all of the portions of the internal gear pump, i.e. bearing race, internal pinion and external pinion, consist of a ceramic material, the surface of the tooth contours of the internal pinion and the external pinion, after their production, being constructed from the natural sintered skin of the ceramic material.
  2. Conveying unit according to claim 1, characterised in that the ceramic material is aluminium oxide.
  3. Conveying unit according to claim 1, characterised in that the ceramic material is silicon carbide.
  4. Conveying unit according to one of claims 1 to 3, characterised in that the conveying unit is used for conveying fuel from a storage tank to the engine of a motor vehicle.
  5. Method for producing a conveying unit for conveying liquids according to one of claims 1 to 4, characterised in that a ceramic material is used to produce all of the portions of the internal gear pump, i.e. bearing race, internal pinion and external pinion, and the surface of the tooth contours of the internal pinion and external pinion is formed in such a way that, after production, it has a natural sintered skin and thus a uniform surface structure.
  6. Method according to claim 5, characterised in that the surface of the tooth contours is produced by close-contour shaping processes, such as finish pressing or injection moulding, for example.
EP95100332A 1994-01-21 1995-01-12 Fluid delivery device with a ceramic internal gear pump Expired - Lifetime EP0664394B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4401783 1994-01-21
DE4401783A DE4401783A1 (en) 1994-01-21 1994-01-21 Conveying unit with a ceramic internal gear pump

Publications (2)

Publication Number Publication Date
EP0664394A1 EP0664394A1 (en) 1995-07-26
EP0664394B1 true EP0664394B1 (en) 2000-07-19

Family

ID=6508437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95100332A Expired - Lifetime EP0664394B1 (en) 1994-01-21 1995-01-12 Fluid delivery device with a ceramic internal gear pump

Country Status (5)

Country Link
US (1) US5618171A (en)
EP (1) EP0664394B1 (en)
JP (1) JPH0835490A (en)
KR (1) KR100385747B1 (en)
DE (2) DE4401783A1 (en)

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Also Published As

Publication number Publication date
KR100385747B1 (en) 2003-08-06
KR960029622A (en) 1996-08-17
DE4401783A1 (en) 1995-07-27
US5618171A (en) 1997-04-08
EP0664394A1 (en) 1995-07-26
JPH0835490A (en) 1996-02-06
DE59508576D1 (en) 2000-08-24

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