EP1503082B1 - Side channel base body for a regenerative pump - Google Patents

Side channel base body for a regenerative pump Download PDF

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Publication number
EP1503082B1
EP1503082B1 EP04026112A EP04026112A EP1503082B1 EP 1503082 B1 EP1503082 B1 EP 1503082B1 EP 04026112 A EP04026112 A EP 04026112A EP 04026112 A EP04026112 A EP 04026112A EP 1503082 B1 EP1503082 B1 EP 1503082B1
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EP
European Patent Office
Prior art keywords
side channel
ceramic disc
base body
plastic body
channel base
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
EP04026112A
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German (de)
French (fr)
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EP1503082A1 (en
Inventor
Stefan Wolters
Michael Rombach
Egbert Neugebauer
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TI Automotive Neuss GmbH
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TI Automotive Neuss GmbH
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Publication of EP1503082A1 publication Critical patent/EP1503082A1/en
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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
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative 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
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially adapted for liquid 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
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative pumps
    • F04D5/007—Details of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00—Geometry
    • F05B2250/50—Inlet or outlet
    • F05B2250/503—Inlet or outlet of regenerative pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/516—Surface roughness

Definitions

  • the invention relates to a side channel main body for a side channel pump having a housing, a drive and at least one pumping unit, which promotes liquid from the inlet of the pumping plant to the outlet of the pumping station, wherein the pumping station has at least a first side channel base body, a second side channel base body and a rotatable impeller disposed therebetween. wherein the impeller in both axial walls an interconnected blade ring and each side channel main body has a narrowing in the running direction of the impeller side channel.
  • Such a side channel pump is disclosed, for example, in DE 197 04 403 A1 and has there measures to improve the efficiency and to reduce the noise by the molded plastic impeller has a metal reinforcement From DE 196 34 253 A1 and US Pat. No. 6,095,771, a two-stage side channel pump with a pump mechanism arranged between two side channel base bodies is known.
  • the side channel base body assigned to the outlet has a ceramic disk and a plastic body.
  • the ceramic disc has a bore for a projection of the plastic body in order to arrange the ceramic disc and the plastic body rotationally fixed to one another.
  • the side channel base body associated with the outlet has, according to US Pat. No. 6,095,771, a side channel which is formed either by the ceramic disk or by a slot in the ceramic disk which cooperates with a recess in the plastic body which corresponds to the slot and is arranged outside the ceramic disk.
  • the ceramic disc has significant manufacturing inaccuracies because the shrinkage of the ceramic during the manufacturing process prevents more accurate manufacture.
  • the cross-sectional area of the side channel fluctuates as a result of the production, and the cross-sectional area which is optimal for a good efficiency can not be exactly realized without costly reworking.
  • it does not make sense to dispense with ceramic as a material, because according to DE 196 34 253 A 1, the ceramic disc to reduce the wear between side channel base and impeller. Otherwise, the life of the side channel pump could be impaired.
  • the object is achieved by a side channel main body for a side channel pump according to claim 1.
  • the side channel main body according to the invention which is arranged as a first side channel main body and / or second side channel main body in the side channel pump according to the invention, has a ceramic disc with a slot which is connected to a plastic body According to the invention, a side channel is formed in the slot of the ceramic disc by the plastic body
  • the ceramic disc on the side facing the impeller has a peripheral shoulder on the circumference and the plastic body around the outer circumference of the ceramic disc around the peripheral paragraph completely or partially fills in
  • the plastic body integral part It is recommended that the ceramic disc is smooth on the surface facing the impeller and rough on all other surfaces, in particular to the side facing away from the impeller advantageously the surface of the ceramic disc facing the impeller by honing or lapping
  • the functional design of the side channel results from the fact that the side channel formed by the plastic body undergoes its cross-sectional taper by reducing the width and / or depth of the side channel.
  • the plastic body consists of a non-crimping dimensionally stable plastic.
  • the thickness of the part of the plastic body protruding into the peripheral shoulder is small in relation to the thickness of the ceramic disk.
  • the manufacturing accuracy requirements for the slot are not particularly high because it is still filled by the plastic body anyway.
  • the impeller-facing side of the ceramic disc has been smoothed, in particular by honing or lapping, the low-wear arrangement, such as in DE 197 04 403 A 1, has been preserved.
  • the plastic body For a high liability of the Sokanlpumpe it is recommended to form the plastic body of a Duro- or thermoplastic.
  • the wear between side channel base body and impeller is therefore not reinforced. Characterized that with the exception of the impeller facing surface, the surfaces of the ceramic disc are rough, they provide a surface that allows the Kunststoffstoftkör by which is applied by injection molding on the ceramic disc, to connect particularly effectively with the ceramic disc.
  • this side channel pump is particularly suitable for mass production because time-consuming and costly machining steps can be omitted.
  • the cross-sectional taper of the side channel by changing its width and / or depth is already formed during the injection molding with high accuracy, so that no subsequent processing is necessary.
  • the ceramic disc is a body that differs only slightly from a basic shape and is therefore much easier to manufacture.
  • Fig. 1 can be seen in a schematic representation that the side channel pump 1 is essentially composed of a housing 2, a drive 5 and a pump unit 6.
  • the pump unit 6 consists of a first side channel main body 7, a second side channel main body 8 and a rotatable impeller 9 arranged therebetween, which conveys liquid from an inlet 3 of the pump unit 6 to an outlet 4 of the pump unit 6.
  • the outlet 4 of the pump unit 6 is arranged so that the pumped liquid flows around the drive 5 and thus additionally kühft him.
  • the side channel pump 1 shown here is a two-stage pump, which can be seen on the two blade rings 10 and 11. With the help of the impeller 9, the liquid entering through the inlet 3 of the pump mechanism 6 is brought by the liquid pulse to a higher pressure level and passed through the side channels 12 and 13 to the outlet.
  • FIG. 2 shows a perspective view of one of the two side channel base bodies 7 or 8. It consists of a ceramic disk 14 and a plastic body 15, wherein in this plan view of the plastic body 15 only the seam channel 12 or 13 can be seen.
  • the ceramic disc 14 has a slot 16 which forms approximately a partial ring.
  • the plastic body 15 forms the side channel 12 and 13, respectively.
  • the taper of the cross section of the side channel 12 and 13 is achieved by reducing its depth.
  • the manufacturing accuracy of the slot 16 need not be particularly high, as inaccuracies are compensated by the slot 16 filling plastic body 15. That is why the efficiency of the side channel pump 1, the manufacturing accuracy of the side channels 12 and 13 relevant and not the manufacturing accuracy of the slot 16.
  • plastic body 15 and ceramic disc 14 is shown in Fig. 3. It can be clearly seen how the plastic body 15 forms the side channel 12 and 13 by its shape in the slot 16. This shaping can be very easily generated during injection molding by a suitably trained tool very easily.
  • the taper of the cross section of the side channel 12 and 13 is achieved by reducing its depth.
  • the cross section of the side channel 12 and 13 is significantly smaller in Fig. 3 on the right side than on the left side.
  • the promotion of the liquid medium by the pump stage 6 is achieved by not shown conveying blades of the impeller 9, the side channel 12 and 13 in a known manner.
  • the impeller 9 and its impeller blades are in direct contact with the surface 18 of the ceramic disc, it is crucial for wear resistance that the surface 18 be particularly smooth, for example by making the surface by honing or lapping.
  • the remaining surfaces of the ceramic disc 14 are rough to further support the connection between the ceramic disc 14 and the plastic body 15.
  • the plastic body 15 engages in this embodiment around the outer circumference of the ceramic disc 14 around in the circumferential shoulder 17 and thus ensures a fixation of the ceramic disc 14 in the plastic body 15th

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

Description

Die Erfindung betrifft einen Seitenkanalgrundkörper für eine Seitenkanalpumpe mit einem Gehäuse, einem Antrieb und mindestens einem Pumpenwerk, das Flüssigkeit vom Einlaß des Pumpenwerkes zum Auslaß des Pumpenwerkes fördert, wobei das Pumpenwerk zumindest einen ersten Seitenkanalgrundkörper, einen zweiten Seitenkanalgrundkörper und ein dazwischen angeordnetes drehbares Laufrad aufweist, wobei das Laufrad in beiden Axialwänden einen miteinander verbundenen Schaufelkranz und jeder Seitenkanalgrundkörper einen in Laufrichtung des Laufrades sich verengenden Seitenkanal aufweist.The invention relates to a side channel main body for a side channel pump having a housing, a drive and at least one pumping unit, which promotes liquid from the inlet of the pumping plant to the outlet of the pumping station, wherein the pumping station has at least a first side channel base body, a second side channel base body and a rotatable impeller disposed therebetween. wherein the impeller in both axial walls an interconnected blade ring and each side channel main body has a narrowing in the running direction of the impeller side channel.

Eine derartige Seitenkanalpumpe ist beispielsweise in DE 197 04 403 A 1 offenbart und weist dort Maßnahmen auf, den Wirkungsgrad zu verbessern und die Geräuschentwicklung zu verringern, indem das aus Kunststoff gespritzte Laufrad eine Metallarmierung aufweist
Aus DE 196 34 253 A1 und US 6,095,771 ist eine zweistufige Seitenkanalpumpe mit einem Pumpenwerk, das zwischen zwei Seitenkanalgrundkörpem angeordnet ist, bekannt. Der dem Auslass zugeordnete Seitenkanalgrundkörper weist eine keramische Scheibe und einen Kunststoffkörper auf. Die keramische Scheibe weist eine Bohrung für einen Vorsprung des Kunststoffkörpers auf, um die keramische Scheibe und den Kunststoffkörper drehfest zueinander anzuordnenden. Der dem Auslass zugeordnete Seitenkanalgrundkörper weist gemäß US 6,095,771 einen Seitenkanal auf, der entweder von der keramischen Scheibe oder durch einen Schlitz in der keramischen Scheibe, der mit einer mit den Schlitz korrespondierenden außerhalb der keramischen Scheibe angeordneten Vertiefung in dem Kunststoffkörper zusammenwirkt, ausgebildet wird.Such a side channel pump is disclosed, for example, in DE 197 04 403 A1 and has there measures to improve the efficiency and to reduce the noise by the molded plastic impeller has a metal reinforcement
From DE 196 34 253 A1 and US Pat. No. 6,095,771, a two-stage side channel pump with a pump mechanism arranged between two side channel base bodies is known. The side channel base body assigned to the outlet has a ceramic disk and a plastic body. The ceramic disc has a bore for a projection of the plastic body in order to arrange the ceramic disc and the plastic body rotationally fixed to one another. The side channel base body associated with the outlet has, according to US Pat. No. 6,095,771, a side channel which is formed either by the ceramic disk or by a slot in the ceramic disk which cooperates with a recess in the plastic body which corresponds to the slot and is arranged outside the ceramic disk.

Die keramische Scheibe weist allerdings deutliche Herstellungsungenauigkeiten auf, da die Schrumpfung der Keramik während des Herstellungsprozesses eine genauere Herstellung verhindert. Dies führt dazu, dass die Querschnittsf!äche des Seitenkanals herstellungsbedingt schwankt und die für einen guten Wirkungsgrad optimale Querschnittsfläche ohne aufwendige Nachbearbeitung nicht genau realisiert werden kann. Andererseits ist es nicht sinnvoll auf Keramik als Werkstoff zu verzichten, denn nach DE 196 34 253 A 1 soll die keramische Scheibe den Verschleiß zwischen Seitenkanalgrundkörper und Laufrad senken. Es könnte sonst die Lebensdauer der Seitenkanalpumpe beeinträchtigt sein.However, the ceramic disc has significant manufacturing inaccuracies because the shrinkage of the ceramic during the manufacturing process prevents more accurate manufacture. As a result of this, the cross-sectional area of the side channel fluctuates as a result of the production, and the cross-sectional area which is optimal for a good efficiency can not be exactly realized without costly reworking. On the other hand, it does not make sense to dispense with ceramic as a material, because according to DE 196 34 253 A 1, the ceramic disc to reduce the wear between side channel base and impeller. Otherwise, the life of the side channel pump could be impaired.

Es besteht daher Bedarf nach für die Großserienfertigung geeigneten Maßnahmen, welche die Schwankungen der Querschnittsfläche des Seitenkanals deutlich verringern ohne den Verschleiß zwischen Seitenkanalgrundkörper und Laufrad zu verstärken.There is therefore a need for measures suitable for mass production which significantly reduce the fluctuations in the cross-sectional area of the side channel without increasing the wear between the side channel main body and the impeller.

Die Aufgabe wird erfindungsgemäß gelöst durch eine Seitenkanalgrundkörper für eine Seitenkanalpumpe gemäß Anspruch 1.The object is achieved by a side channel main body for a side channel pump according to claim 1.

Der erfindungsgemäße Seitenkanalgrundkörper, der als erster Seitenkanalgrundkörper und/ oder zweiter Seitenkanalgrundkörper in der erfindungsgemäßen Seitenkanalpumpe angeordnet ist, weist eine keramische Scheibe mit einem Schlitz auf, die mit einem Kunststoffkörper verbunden ist Erfindungsgemäß ist im Schlitz der keramischen Scheibe durch den Kunststoffkörper ein Seitenkanal ausgebildetThe side channel main body according to the invention, which is arranged as a first side channel main body and / or second side channel main body in the side channel pump according to the invention, has a ceramic disc with a slot which is connected to a plastic body According to the invention, a side channel is formed in the slot of the ceramic disc by the plastic body

Eine vorteilhafte Ausbildung besteht darin, dass die keramische Scheibe auf der dem Laufrad zugewandten Seite am Umfang einen umlaufenden Absatz aufweist und der Kunststoffkörper um den äußeren Umfang der keramischen Scheibe herum den umlaufenden Absatz ganz oder teilweise ausfüllt Eine Alternative besteht darin, dass der Kunststoffkörper integraler Bestandteil des Gehäuses ist Es empfiehlt sich, dass die keramische Scheibe auf der zum Laufrad weisenden Fläche glatt und auf allen anderen Flächen, insbesondere zu der dem Laufrad abgewandten Seite, rau ist in vorteilhafter Weise ist die zum Pumpenrad weisenden Fläche der keramischen Scheibe durch Honen oder Läppen hergestellt Die funktionsgerechte Form des Seitenkanals ergibt sich dadurch, dass der vom Kunststoffkörper ausgebildete Seitenkanal seine Querschnittsverjüngung durch Verringerung der Breite und/oder Tiefe des Seitenkanals erfährt. Außerdem hat es sich als vorteilhaft ergeben, dass der Kunststoffkörper aus einem nichtquetlenden formstabilen Kunststoff besteht. Wenn ein Teil des Kunststoffkörpers den in der keramischen Scheibe vorgesehenen umlaufenden Absatz ganz oder teilweise ausfüllt, ist es eine vorteilhafte Ausführung, dass die Dicke des in den umlaufenden Absatz ragende Teiles des Kunststoffkörpers klein im Verhältnis zur Dicke der keramischen Scheibe ist.
Durch diese Erfindung ist es möglich die Vorteile der Werkstoffe Keramik und Kunststoff für eine Seitenkanalpumpe zu kombinieren, indem die vom Seitenkanalgrundkörper zu erfüllenden Funktionen auf die keramische Scheibe und den Kunststoffkörper aufgeteilt werden. So kann der Verbundkörper durch die Eigenschaften des Kunststoffmaterials gleichzeitig die direkte Lagerung der Antriebswelle ohne zusätzliches Bauteil darstellen.An advantageous embodiment is that the ceramic disc on the side facing the impeller has a peripheral shoulder on the circumference and the plastic body around the outer circumference of the ceramic disc around the peripheral paragraph completely or partially fills in An alternative is that the plastic body integral part It is recommended that the ceramic disc is smooth on the surface facing the impeller and rough on all other surfaces, in particular to the side facing away from the impeller advantageously the surface of the ceramic disc facing the impeller by honing or lapping The functional design of the side channel results from the fact that the side channel formed by the plastic body undergoes its cross-sectional taper by reducing the width and / or depth of the side channel. In addition, it has proven to be advantageous that the plastic body consists of a non-crimping dimensionally stable plastic. If a part of the plastic body completely or partially fills the circumferential shoulder provided in the ceramic disk, it is an advantageous embodiment that the thickness of the part of the plastic body protruding into the peripheral shoulder is small in relation to the thickness of the ceramic disk.
By this invention, it is possible to combine the advantages of the materials ceramic and plastic for a side channel pump by the functions to be fulfilled by the side channel base body are divided on the ceramic disc and the plastic body. Thus, the composite body can simultaneously represent the direct storage of the drive shaft without additional component by the properties of the plastic material.

Die Anforderungen hinsichtlich der Herstellungsgenauigkeit an den Schlitz sind nicht besonders hoch, da er sowieso noch durch den Kunststoffkörper ausgefüllt wird. Nachdem die dem Laufrad zugewandte Seite der keramischen Scheibe geglättet wurde, insbesondere durch Honen oder Läppen, ist die verschleißarme Anordnung, wie beispielsweise in DE 197 04 403 A 1, erhalten geblieben. Für eine hohe Haftbarkeit der Seitenkanlpumpe empfiehlt es sich den Kunststoffkörper aus einem Duro- bzw. Thermoplast zu bilden. Der Verschleiß zwischen Seitenkanalgrundkörper und Laufrad ist also nicht verstärkt.
Dadurch dass mit Ausnahme der dem Laufrad zugewandten Fläche die Flächen der keramischen Scheibe rau sind, bieten sie eine Oberfläche, die es dem Kunststoftkör per, der durch Spritzguß auf die keramische Scheibe aufgebracht wird, erlaubt, sich besonders wirkungsvoll mit der keramischen Scheibe zu verbinden. Erheblich verbessert wird der Halt, indem die keramische Scheibe auf der dem Laufrad zugewandten Seite am Umfang geeignete Maßnahmen z. B. Verzahnung, Absatz etc. aufweist. Denn dann kann der Kunststoffkörper um den äußeren Umfang der keramischen Scheibe herum den umlaufenden Absatz umgreifen, so dass die keramische Scheibe im Kunststoffkörper vollständig fixiert ist. Dadurch ist es möglich den so gebildeten Seitenkanalgrundkörper so in der Seitenkanalpumpe anzuordnen, dass eine axiale Kraft, um die keramische Scheibe und den Kunststoffkörper zusammenzuhalten, nicht zwingend erforderlich ist. Dem Kunststoffkörper kann während des Spritzgießens durch ein entsprechend gestaltetes Werkzeug mit höher Genauigkeit die Form des Seitenkanals im Schlitz der keramischen Scheibe aufgeprägt werden, wodurch die Genauigkeit der Ausbildung des Seitenkanals erheblich verbessert wird.
Die Schwankungen der Querschnittsfläche des Seitenkanalelemets werden also deutlich verringert.
Durch diese Vorgehensweise ist die Herstellung dieser Seitenkanalpumpe in besonderer Weise für die Großserienfertigung geeignet, da zeit- und kostenintensive Bear-beitungsschritte wegfallen können. Die Querschnittsverjüngung des Seitenkanals durch Veränderung seiner Breite und/oder Tiefe wird bereits während des Spritzgießens mit hoher Genauigkeit ausgebildet, so daß keine anschließende Bearbeitung notwendig ist. Bei der keramischen Scheibe handelt es sich um einen Körper, der nur wenig von einer Grundform abweicht und ist somit deutlich einfacher herzustellen.The manufacturing accuracy requirements for the slot are not particularly high because it is still filled by the plastic body anyway. After the impeller-facing side of the ceramic disc has been smoothed, in particular by honing or lapping, the low-wear arrangement, such as in DE 197 04 403 A 1, has been preserved. For a high liability of the Seitenkanlpumpe it is recommended to form the plastic body of a Duro- or thermoplastic. The wear between side channel base body and impeller is therefore not reinforced.
Characterized that with the exception of the impeller facing surface, the surfaces of the ceramic disc are rough, they provide a surface that allows the Kunststoftkör by which is applied by injection molding on the ceramic disc, to connect particularly effectively with the ceramic disc. Significantly improves the hold by the ceramic disk on the side facing the impeller on the circumference suitable measures z. B. teeth, paragraph, etc. has. Because then the plastic body around the outer circumference of the ceramic disc around the circumferential shoulder engage around so that the ceramic disc is completely fixed in the plastic body. This makes it possible to arrange the side channel base body thus formed in the side channel pump, that an axial force to hold the ceramic disc and the plastic body, is not mandatory. The plastic body can be impressed during injection molding by an appropriately designed tool with high accuracy, the shape of the side channel in the slot of the ceramic disc, whereby the accuracy of the formation of the side channel is significantly improved.
The variations in the cross-sectional area of the Seitenkanalelemets are thus significantly reduced.
By this procedure, the production of this side channel pump is particularly suitable for mass production because time-consuming and costly machining steps can be omitted. The cross-sectional taper of the side channel by changing its width and / or depth is already formed during the injection molding with high accuracy, so that no subsequent processing is necessary. The ceramic disc is a body that differs only slightly from a basic shape and is therefore much easier to manufacture.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend beschrieben, wobei

  • Fig. 1 eine schematische Darstellung einer typischen Seitenkanalpumpe,
  • Fig. 2 eine perspektivische Ansicht eines aus der keramischen Scheibe und dem Kunststoffkörper bestehenden Seitenkanalgrundkörpers und
  • Fig. 3 eine Seitenansicht der Anordnung eines Seitenkanalgrundkörpers.
An embodiment of the invention is illustrated in the drawing and will be described below, wherein
  • 1 is a schematic representation of a typical side channel pump,
  • Fig. 2 is a perspective view of an existing of the ceramic disc and the plastic body side channel main body and
  • Fig. 3 is a side view of the arrangement of a Seitenkanalgrundkörpers.

In Fig. 1 ist in einer schematischen Darstellung zu sehen, dass die Seitenkanalpumpe 1 im wesentlichen aus einem Gehäuse 2, einem Antrieb 5 und einem Pumpenwerk 6 aufgebaut ist. Das Pumpenwerk 6 besteht aus einem ersten Seitenkanalgrundkörper 7, einem zweiten Seitenkanalgrundkörper 8 und einen dazwischen angeordneten drehbaren Laufrad 9, das Flüssigkeit von einem Einlaß 3 des Pumpenwerkes 6 zu einem Auslaß 4 des Pumpenwerkes 6 fördert. Der Auslaß 4 des Pumpenwerkes 6 ist so angeordnet, dass die geförderte Flüssigkeit den Antrieb 5 umspült und ihn somit zusätzlich kühft. Bei der hier dargestellten Seitenkanalpumpe 1 handelt es sich um eine zweistufige Pumpe, was man an den beiden Schaufelkränzen 10 und 11 sehen kann. Die beiden Seitenkanalgrundkörper 7 und 8 enthalten jeweils einen Seitenkanal 12 bzw. 13. Mit Hilfe des Laufrades 9 wird die durch den Einlaß 3 des Pumpenwerkes 6 eintretende Flüssigkeit durch den Flüssigkeitsimpuls auf ein höheres Druckniveau gebracht und durch die Seitenkanäle 12 und 13 zum Auslaß geführt.In Fig. 1 can be seen in a schematic representation that the side channel pump 1 is essentially composed of a housing 2, a drive 5 and a pump unit 6. The pump unit 6 consists of a first side channel main body 7, a second side channel main body 8 and a rotatable impeller 9 arranged therebetween, which conveys liquid from an inlet 3 of the pump unit 6 to an outlet 4 of the pump unit 6. The outlet 4 of the pump unit 6 is arranged so that the pumped liquid flows around the drive 5 and thus additionally kühft him. In the side channel pump 1 shown here is a two-stage pump, which can be seen on the two blade rings 10 and 11. With the help of the impeller 9, the liquid entering through the inlet 3 of the pump mechanism 6 is brought by the liquid pulse to a higher pressure level and passed through the side channels 12 and 13 to the outlet.

Fig. 2 zeigt eine perspektivische Ansicht eines der beiden Seitenkanalgrundkörper 7 oder 8. Er besteht aus einer keramischen Scheibe 14 und einen Kunststoffkörper 15, wobei in dieser Draufsicht vom Kunststoffkörper 15 nur der Seftenkanal 12 bzw. 13 zu sehen ist. Die keramische Scheibe 14 besitzt einen Schlitz 16, der in etwa einen Teilring bildet. In diesem Schlitz 16 bildet der Kunststoffkörper 15 den Seitenkanal 12 bzw. 13 aus. In dieser Ausführung wird die Verjüngung des Querschnitts des Seitenkanals 12 bzw. 13 durch eine Verringerung seiner Tiefe erreicht. Es sollte deutlich sein, daß die Herstellungsgenauigkeit des Schlitzes 16 nicht besonders hoch zu sein braucht, da Ungenauigkeiten durch den den Schlitz 16 ausfüllenden Kunststoffkörper 15 ausgeglichen werden. Deswegen ist für den Wirkungsgrad der Seitenkanalpumpe 1 die Herstellungsgenauigkeit der Seitenkanäle 12 und 13 relevant und nicht die Herstellungsgenauigkeit des Schlitzes 16.
In einer Seitenansicht wird in Fig. 3 die Anordnung von Kunststoffkörper 15 und keramischer Scheibe 14 dargestellt. Es ist deutlich zu sehen, wie der Kunststoffkörper 15 durch seine Formgebung im Schlitz 16 den Seitenkanal 12 bzw. 13 ausbildet. Diese Formgebung läßt sich besonders einfach während des Spritzgusses durch ein entsprechend ausgebildetes Werkzeug sehr genau erzeugen. In dieser Ausführung wird die Verjüngung des Querschnitts des Seitenkanals 12 bzw. 13 durch eine Verringerung seiner Tiefe erreicht. Der Querschnitt des Seitenkanals 12 bzw. 13 ist in Fig. 3 auf der rechten Seite deutlich kleiner als auf der linken Seite. Die Förderung des flüssigen Mediums durch die Pumpenstufe 6 wird erreicht, indem nicht dargestellte Förderschaufeln des Laufrades 9 den Seitenkanal 12 bzw. 13 in bekannter Weise überstreichen. Da das Laufrad 9 und seine Förderschaufeln im direkten Kontakt mit der Oberfläche 18 der keramischen Scheibe sind, ist es für die Verschleißfestigkeit von entscheidender Bedeutung, dass die Oberfläche 18 besonders glatt ist, beispielsweise indem die Oberfläche durch Honen oder Läppen hergestellt ist. Im Gegensatz dazu sind die übrigen Oberflächen der keramischen Scheibe 14 rau, um die Verbindung zwischen der keramischen Scheibe 14 und den Kunststoffkörper 15 zusätzlich zu unterstützen. Der Kunststoffkörper 15 greift in dieser Ausführung um den äußeren Umfang der keramischen Scheibe 14 herum in den umlaufenden Absatz 17 ein und sorgt so für eine Fixierung der keramischen Scheibe 14 im Kunststoffkörper 15.FIG. 2 shows a perspective view of one of the two side channel base bodies 7 or 8. It consists of a ceramic disk 14 and a plastic body 15, wherein in this plan view of the plastic body 15 only the seam channel 12 or 13 can be seen. The ceramic disc 14 has a slot 16 which forms approximately a partial ring. In this slot 16, the plastic body 15 forms the side channel 12 and 13, respectively. In this embodiment, the taper of the cross section of the side channel 12 and 13 is achieved by reducing its depth. It should be clear that the manufacturing accuracy of the slot 16 need not be particularly high, as inaccuracies are compensated by the slot 16 filling plastic body 15. That is why the efficiency of the side channel pump 1, the manufacturing accuracy of the side channels 12 and 13 relevant and not the manufacturing accuracy of the slot 16.
In a side view, the arrangement of plastic body 15 and ceramic disc 14 is shown in Fig. 3. It can be clearly seen how the plastic body 15 forms the side channel 12 and 13 by its shape in the slot 16. This shaping can be very easily generated during injection molding by a suitably trained tool very easily. In this embodiment, the taper of the cross section of the side channel 12 and 13 is achieved by reducing its depth. The cross section of the side channel 12 and 13 is significantly smaller in Fig. 3 on the right side than on the left side. The promotion of the liquid medium by the pump stage 6 is achieved by not shown conveying blades of the impeller 9, the side channel 12 and 13 in a known manner. Since the impeller 9 and its impeller blades are in direct contact with the surface 18 of the ceramic disc, it is crucial for wear resistance that the surface 18 be particularly smooth, for example by making the surface by honing or lapping. In contrast, the remaining surfaces of the ceramic disc 14 are rough to further support the connection between the ceramic disc 14 and the plastic body 15. The plastic body 15 engages in this embodiment around the outer circumference of the ceramic disc 14 around in the circumferential shoulder 17 and thus ensures a fixation of the ceramic disc 14 in the plastic body 15th

Claims (7)

  1. A side channel base body for a side channel pump, comprising
    a ceramic disc (14) with a slot (16) therein, and
    a plastic body (15) connected with the ceramic disc (14) and forming a side channel (12, 13) in the slot (16).
  2. The side channel base body of claim 1, wherein the ceramic disc (14) has a circumferential shoulder (17) at its periphery, the plastic body (15) at least partly filling the shoulder (17).
  3. The side channel base body of claim 1 or 2, wherein the plastic body (15) has an inlet (3) for conveying a liquid into a pump mechanism (6).
  4. The side channel base body of one of claims 1 - 3, wherein the cross section of the side channel (12, 13) is constricted by reducing the width and/or the depth of the side channel (12, 13).
  5. The side channel base body of one of claims 1-4, wherein the plastic body (15) is made of a plastic material dimensionally stable in the presence of fuel.
  6. The side channel base body of one of claims 1 - 5, wherein the ceramic disc (14) is smooth on one surface (18) and rough on all other surfaces.
  7. The side channel base body of claim 6, wherein the smooth surface (18) is formed by honing or lapping.
EP04026112A 2002-01-11 2002-09-10 Side channel base body for a regenerative pump Expired - Lifetime EP1503082B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10200791 2002-01-11
DE10200791A DE10200791A1 (en) 2002-01-11 2002-01-11 Side channel pump
EP02020217A EP1329637B1 (en) 2002-01-11 2002-09-10 Regenerative pump

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP02020217A Division EP1329637B1 (en) 2002-01-11 2002-09-10 Regenerative pump

Publications (2)

Publication Number Publication Date
EP1503082A1 EP1503082A1 (en) 2005-02-02
EP1503082B1 true EP1503082B1 (en) 2006-02-22

Family

ID=7711885

Family Applications (2)

Application Number Title Priority Date Filing Date
EP04026112A Expired - Lifetime EP1503082B1 (en) 2002-01-11 2002-09-10 Side channel base body for a regenerative pump
EP02020217A Expired - Lifetime EP1329637B1 (en) 2002-01-11 2002-09-10 Regenerative pump

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP02020217A Expired - Lifetime EP1329637B1 (en) 2002-01-11 2002-09-10 Regenerative pump

Country Status (3)

Country Link
US (1) US6755610B2 (en)
EP (2) EP1503082B1 (en)
DE (3) DE10200791A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10327321A1 (en) * 2003-06-16 2005-01-13 Siemens Ag As a G-rotor pump trained positive displacement pump
JP4534677B2 (en) * 2003-10-31 2010-09-01 株式会社デンソー Fuel pump
CN105782028A (en) * 2016-04-25 2016-07-20 域西机械技术(上海)有限公司 Application of structural ceramics to cam pump

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4243225A1 (en) * 1992-12-19 1994-06-23 Pierburg Gmbh Fuel pump
DE19634253A1 (en) 1995-12-30 1997-07-03 Bosch Gmbh Robert Unit for delivering fuel
DE19704403B4 (en) * 1997-02-06 2006-10-05 Ti Automotive (Neuss) Gmbh fuel pump
US6435810B1 (en) * 2000-10-20 2002-08-20 Delphi Technologies, Inc. Wear resistant fuel pump
US6454521B1 (en) * 2000-11-15 2002-09-24 Delphi Technologies, Inc. Wear resistant fuel pump

Also Published As

Publication number Publication date
US20030133784A1 (en) 2003-07-17
DE50202475D1 (en) 2005-04-21
EP1503082A1 (en) 2005-02-02
EP1329637A1 (en) 2003-07-23
EP1329637B1 (en) 2005-03-16
DE10200791A1 (en) 2003-07-24
US6755610B2 (en) 2004-06-29
DE50205893D1 (en) 2006-04-27

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