EP1934480B1 - Rotor pump and vane for a rotor pump - Google Patents

Rotor pump and vane for a rotor pump Download PDF

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Publication number
EP1934480B1
EP1934480B1 EP06792217A EP06792217A EP1934480B1 EP 1934480 B1 EP1934480 B1 EP 1934480B1 EP 06792217 A EP06792217 A EP 06792217A EP 06792217 A EP06792217 A EP 06792217A EP 1934480 B1 EP1934480 B1 EP 1934480B1
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EP
European Patent Office
Prior art keywords
vane
wing
rotor
tip
pump
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
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EP06792217A
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German (de)
French (fr)
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EP1934480A1 (en
Inventor
Willi Schneider
Martin Thoma
Hans-Peter Ott
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.)
Joma Polytec GmbH
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Joma Polytec GmbH
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Publication date
Priority claimed from DE200510050001 external-priority patent/DE102005050001A1/en
Priority claimed from DE102006016240A external-priority patent/DE102006016240A1/en
Application filed by Joma Polytec GmbH filed Critical Joma Polytec GmbH
Publication of EP1934480A1 publication Critical patent/EP1934480A1/en
Application granted granted Critical
Publication of EP1934480B1 publication Critical patent/EP1934480B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • F04C18/3442—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the inlet and outlet opening
    • 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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/001—Radial sealings for working fluid
    • 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
    • F04C2220/00—Application
    • F04C2220/10—Vacuum

Definitions

  • the invention relates to a blade for a rotor pump with the features of the preamble of claim 1.
  • the invention also relates to a rotor pump with such a wing.
  • a rotor pump which has a pump housing in which a rotor is arranged.
  • a wing is mounted, which rests against the inner peripheral side of the housing.
  • the wing is constructed in two parts, so that it can take different lengths. This ensures that the rotor always rests against the inner peripheral surface and the pump chamber is divided into a pressure chamber and a suction chamber.
  • the wing tips are provided with inserts, which consist of a hard material. It has been shown that over time, the wing tips wear out and the wing or possibly even the entire rotor pump must be replaced.
  • From the JP-A-11 311 188 is a wing consisting of a wing body and a wing tip known whose wing body has a groove into which the wing tip is used.
  • the groove walls are deformed so that the groove gap narrows, so that the wing tip is picked up by clamping.
  • the invention has for its object to provide a wing and / or a rotor pump, in which or in which the wing tip is held securely in the wing body and still minimal costs in repair or maintenance occur.
  • This inventive design of a wing has the significant advantage that the wing body and the wing tip can be mounted relatively easily, which can also be done automatically.
  • the wing body can be paired with the respective suitable wing tips, so that from a tribological point of view, the optimal material pairing of wing tip and peripheral wall can be selected.
  • the wing body is preserved and can be used again.
  • the fixation of the wing tip on the wing body is done by the positive connection and Rear grip, seen in particular in the longitudinal direction of the wing body prevails.
  • the positive connection is a crimp. This means that the positive connection is only generated when the material of the wing body and / or the material of the wing tip is deformed. In this crimping, the material of the wing body or the material of the wing tip is locally deformed such that a rear grip is generated with the respective other component.
  • the wing tip or the wing body on a receiving pocket for a portion of the other component, ie the wing body or the wing tip.
  • This receiving pocket has the task of receiving the wing tip or the free end of the wing body, so that the wing tip is stored defined on the wing body and is guided without play on the inner peripheral wall of the housing.
  • the receiving pocket is flanked by a pocket wall, which has a plastically deformable area. This area usually has a small wall thickness, so that the deformation can be carried out without affecting the material lying around this deformable area.
  • the deformation takes place, for example, by means of a crimping tool or press ram, which acts on the pocket wall from the outside and pushes it in regions in the direction of the receiving pocket.
  • the component lying against the deformable region that is to say the wing tip or the wing body, has a recess into which the region can be deformed.
  • the plastically deformed area is therefore not only on the surface of the other component, but forms with this a positive connection and preferably also a frictional connection, so that the wing tip is fixed clearance and defined on the wing body.
  • the recess is filled with an elastically deformable material, so that when molding the material of the plastically deformable portion of the other component of this elastically deformable material is displaced and thereby any play between the wing tip and the wing body is compensated.
  • This game comes for example from an unfavorable component pairing, different thermal expansions in different materials or by a memory effect, due to which the plastically deformed area slightly deformed back and thereby possibly loosens the wing tip on the wing body. Since the elastically deformable material compensates for this game, an optimal fixation of the wing tip in the wing body is ensured over a long life and over a wide temperature range.
  • the wing body has two wing tips when the wing body is integrally formed. Than are both wing tips as mentioned above, attached to the wing body.
  • the invention also relates to a rotor pump, which is equipped with a wing, as described above.
  • the rotor pump may preferably be a vacuum pump.
  • FIG. 1 shows a generally designated 2 rotor pump, in a known manner, a pump housing 10, a rotatably mounted in the example teil Vietnamesezylindrischen pump chamber 12 rotatably mounted rotor 16 which is rotatably connected to a drive shaft 14, and a radially displaceably mounted in this wing 18, the its free ends 20 each have a wing tip 22.
  • a rotor pump 2 is for example from the EP 1 471 255 A1 known.
  • the rotor 18 has a hollow cylindrical rotor shell 24, in which the wing 18 is received radially displaceable.
  • the pump chamber 12 is, which is not shown for simplicity, sealed at both ends, wherein the drive shaft 14 which penetrates a housing end wall liquid-tight.
  • an inflow and an outflow line are connected to the pump chamber 12 in order to be able to supply a fluid to be pumped from the rotor pump 2 and to be able to discharge it again.
  • FIG. 2 shows the wing 18, which has a wing body 26, at its two free ends 20, the wing tips 22 are provided, which are inserted into receiving pockets 28.
  • the receiving pockets 28 take the wing tips 22 preferably free of play.
  • the receiving pockets 28 are so executed that they do not form an undercut with the wing tip 22 seen in the longitudinal direction 30.
  • the pocket wall 34 has a in the FIG. 2 shown in phantom plastically deformable region 36, which is perpendicular to the longitudinal direction 30 seen, that is in the thickness direction of the wing 18, aligned with the receiving pocket 28.
  • This region 36 is deformable in the receiving pocket 28 by means of a suitable crimping or pressing tool which can be deformed in the direction 38, that is to say in the thickness direction of the wing 18. In this case, material of the region 36 is displaced into the depression 32.
  • a rear grip is created both in the direction of the longitudinal axis 30 and in the width direction 40 of the wing 18, which prevents the wing tip 22 of the receiving pocket 28 of the wing body 26 can be removed.
  • the wing tip 22 is thus fixed to the wing body 26.
  • the depression 32 may be filled with an elastic material, for example a plastic material, which is displaced as soon as material from the region 36 is molded into the depression 32 by the wing body 26.
  • an elastic material for example a plastic material
  • Such areas 36 are advantageously provided on both pocket walls 34, and correspondingly, the wing tip 22 has two depressions 32 opposite these areas 36.
  • the wing tip 22 When worn wing tip 22, for example in case of repair, the wing tip 22 is either pulled out of the receiving pocket 28 in the longitudinal direction 30 or pushed out in the width direction 40 by means of a suitable tool. The positive connection between the wing body 26 and wing tip 22 is canceled. After inserting a new wing tip 22 material is displaced from the pocket wall 34 in the region 36 again in the recess 32. As a result, a simple way for the restoration of a worn wing 18 is created. In addition, the wing tip 22 is held in a simple but safe manner on the wing body 26.

Abstract

The invention relates to a vane (18) for a rotor pump (2) which comprises a pump housing and a rotor rotatably received therein. Said vane (18) is displaceably received in the rotor and rests on the interior peripheral surface of the pump housing with its vane tip (22) which projects from the rotor and which is provided on a vane base (26), said vane tip being a separate component. The vane tip and the vane base, especially when seen from the longitudinal direction of the vane base, are interlinked in a form-fit. The invention also relates to a rotor pump comprising a vane of the aforementioned type.

Description

Die Erfindung betrifft einen Flügel für eine Rotorpumpe mit dem Merkmalen des Oberbegriffs des Anspruchs 1. Die Erfindung betrifft außerdem eine Rotorpumpe mit einem derartigen Flügel.The invention relates to a blade for a rotor pump with the features of the preamble of claim 1. The invention also relates to a rotor pump with such a wing.

Aus der EP-A-1 471 255 ist eine Rotorpumpe bekannt, welche ein Pumpengehäuse aufweist, in welchem ein Rotor angeordnet ist. In diesem Rotor ist ein Flügel gelagert, welcher an der Innenumfangsseite des Gehäuses anliegt. Der Flügel ist zweiteilig aufgebaut, so dass er unterschiedliche Längen annehmen kann. Dadurch ist gewährleistet, dass der Rotor stets an der Innenumfangsfläche anliegt und der Pumpenraum in einen Druckraum und in einen Saugraum aufgeteilt wird. Außerdem sind die Flügelspitzen mit Einlagen versehen, welche aus einem harten Material bestehen. Es hat sich gezeigt, dass im Laufe der Zeit die Flügelspitzen verschleißen und der Flügel oder eventuell sogar die gesamte Rotorpumpe ausgetauscht werden muss.From the EP-A-1 471 255 a rotor pump is known, which has a pump housing in which a rotor is arranged. In this rotor, a wing is mounted, which rests against the inner peripheral side of the housing. The wing is constructed in two parts, so that it can take different lengths. This ensures that the rotor always rests against the inner peripheral surface and the pump chamber is divided into a pressure chamber and a suction chamber. In addition, the wing tips are provided with inserts, which consist of a hard material. It has been shown that over time, the wing tips wear out and the wing or possibly even the entire rotor pump must be replaced.

Aus der JP-A-11 311 188 ist eine Flügel bestehend aus einem Flügelgrundkörper und einer Flügelspitze bekannt, dessen Flügelgrundkörper eine Nut aufweist, in die die Flügelspitze eingesetzt ist. Die Nutwände werden so verformt, dass sich der Nutspalt verengt, so dass die Flügelspitze klemmend aufgenommen wird. Durch Temperaturschwankungen, Vibrationen und Materialermüdung besteht aber dennoch die Gefahr, dass sich die Flügelspitze lockert oder sogar löst.From the JP-A-11 311 188 is a wing consisting of a wing body and a wing tip known whose wing body has a groove into which the wing tip is used. The groove walls are deformed so that the groove gap narrows, so that the wing tip is picked up by clamping. However, due to temperature fluctuations, vibrations and material fatigue, there is still the danger that the wing tip loosens or even loosens.

Der Erfindung liegt die Aufgabe zugrunde, einen Flügel und/oder eine Rotorpumpe bereitzustellen, bei welchem beziehungsweise bei welcher die Flügelspitze sicher im Flügelgrundkörper gehalten ist und dennoch minimale Kosten im Reparatur- beziehungsweise im Wartungsfall auftreten.The invention has for its object to provide a wing and / or a rotor pump, in which or in which the wing tip is held securely in the wing body and still minimal costs in repair or maintenance occur.

Diese Aufgabe wird mit einem Flügel gelöst, der die Merkmale des Anspruchs 1 aufweist.This object is achieved with a wing having the features of claim 1.

Diese erfindungsgemäße Ausgestaltung eines Flügels besitzt den wesentlichen Vorteil, dass der Flügelkörper und die Flügelspitze relativ einfach montiert werden können, was auch automatisch erfolgen kann. Außerdem kann der Flügelkörper mit den jeweils geeigneten Flügelspitzen gepaart werden, so dass aus tribologischer Sicht die optimale Materialpaarung von Flügelspitze und Umfangswand gewählt werden kann. Im Verschleißfalle muss lediglich die Flügelspitze getauscht werden, wobei der Flügelkörper erhalten bleibt und wieder verwendet werden kann. Die Fixierung der Flügelspitze am Flügelkörper erfolgt durch den formschlüssigen Verbund und Hintergriff, der insbesondere in Längsrichtung des Flügelkörpers gesehen, vorherrscht.This inventive design of a wing has the significant advantage that the wing body and the wing tip can be mounted relatively easily, which can also be done automatically. In addition, the wing body can be paired with the respective suitable wing tips, so that from a tribological point of view, the optimal material pairing of wing tip and peripheral wall can be selected. In the case of wear only the wing tip must be replaced, the wing body is preserved and can be used again. The fixation of the wing tip on the wing body is done by the positive connection and Rear grip, seen in particular in the longitudinal direction of the wing body prevails.

Erfindungsgemäß ist vorgesehen, dass der Formschluss eine Verkrimpung ist. Dies bedeutet, dass der Formschluss erst dann erzeugt wird, wenn das Material des Flügelkörpers und/oder das Material der Flügelspitze verformt wird. Bei dieser Verkrimpung wird das Material des Flügelkörpers oder das Material der Flügelspitze lokal derart verformt, dass ein Hintergriff mit dem jeweils anderen Bauteil erzeugt wird.According to the invention, it is provided that the positive connection is a crimp. This means that the positive connection is only generated when the material of the wing body and / or the material of the wing tip is deformed. In this crimping, the material of the wing body or the material of the wing tip is locally deformed such that a rear grip is generated with the respective other component.

Dabei weist die Flügelspitze oder der Flügelkörper eine Aufnahmetasche für einen Abschnitt des jeweils anderen Bauteils, also des Flügelkörpers oder der Flügelspitze auf. Diese Aufnahmetasche besitzt die Aufgabe, die Flügelspitze oder das freie Ende des Flügelkörpers aufzunehmen, so dass die Flügelspitze definiert am Flügelkörper gelagert ist und spielfrei an der Innenumfangswand des Gehäuses geführt wird. Dabei ist die Aufnahmetasche von einer Taschenwand flankiert, die einen plastisch verformbaren Bereich aufweist. Dieser Bereich besitzt in der Regel eine geringe Wandstärke, so dass die Verformung ohne Beeinträchtigung des um diesen verformbaren Bereich herumliegenden Materials durchgeführt werden kann. Die Verformung erfolgt zum Beispiel mittels eines Krimpwerkzeugs oder Pressstempels, der von außen an der Taschenwand angreift und diese bereichsweise nach innen in Richtung der Aufnahmetasche drückt.In this case, the wing tip or the wing body on a receiving pocket for a portion of the other component, ie the wing body or the wing tip. This receiving pocket has the task of receiving the wing tip or the free end of the wing body, so that the wing tip is stored defined on the wing body and is guided without play on the inner peripheral wall of the housing. The receiving pocket is flanked by a pocket wall, which has a plastically deformable area. This area usually has a small wall thickness, so that the deformation can be carried out without affecting the material lying around this deformable area. The deformation takes place, for example, by means of a crimping tool or press ram, which acts on the pocket wall from the outside and pushes it in regions in the direction of the receiving pocket.

Vorzugsweise weist das am verformbaren Bereich anliegende Bauteil, also die Flügelspitze oder der Flügelkörper eine Einsenkung auf, in welche der Bereich hineinverformbar ist. Der plastisch verformte Bereich liegt also nicht nur an der Oberfläche des anderen Bauteils an, sondern bildet mit diesem einen Formschluss und vorzugsweise auch einen Kraftschluss, so dass die Flügelspitze spielfrei und definiert am Flügelkörper befestigt ist.Preferably, the component lying against the deformable region, that is to say the wing tip or the wing body, has a recess into which the region can be deformed. The plastically deformed area is therefore not only on the surface of the other component, but forms with this a positive connection and preferably also a frictional connection, so that the wing tip is fixed clearance and defined on the wing body.

Vorzugsweise ist die Einsenkung mit einem elastisch verformbaren Material angefüllt, so dass beim Einformen des Materials des plastisch verformbaren Bereichs des anderen Bauteils dieses elastisch verformbare Material verdrängt wird und dadurch jegliches Spiel zwischen der Flügelspitze und dem Flügelkörper ausgeglichen wird. Dieses Spiel kommt zum Beispiel von einer ungünstigen Bauteilpaarung, unterschiedlichen Wärmedehnungen bei unterschiedlichen Materialien oder durch einen Memoryeffekt, aufgrund dessen sich der plastisch verformte Bereich geringfügig zurückverformt und sich dadurch die Flügelspitze eventuell am Flügelkörper lockert. Da das elastisch verformbare Material dieses Spiel ausgleicht, ist über eine lange Lebensdauer und auch über einen großen Temperaturbereich eine optimale Fixierung der Flügelspitze im Flügelkörper gewährleistet.Preferably, the recess is filled with an elastically deformable material, so that when molding the material of the plastically deformable portion of the other component of this elastically deformable material is displaced and thereby any play between the wing tip and the wing body is compensated. This game comes for example from an unfavorable component pairing, different thermal expansions in different materials or by a memory effect, due to which the plastically deformed area slightly deformed back and thereby possibly loosens the wing tip on the wing body. Since the elastically deformable material compensates for this game, an optimal fixation of the wing tip in the wing body is ensured over a long life and over a wide temperature range.

Vorzugsweise besitzt der Flügelkörper zwei Flügelspitzen, wenn der Flügelkörper einteilig ausgebildet ist. Dann sind beide Flügelspitzen wie oben erwähnt, am Flügelkörper befestigt.Preferably, the wing body has two wing tips when the wing body is integrally formed. Than are both wing tips as mentioned above, attached to the wing body.

Die Erfindung betrifft auch eine Rotorpumpe, welche mit einem Flügel ausgestattet ist, wie er oben beschrieben ist. Dabei kann die Rotorpumpe vorzugsweise eine Vakuumpumpe sein.The invention also relates to a rotor pump, which is equipped with a wing, as described above. In this case, the rotor pump may preferably be a vacuum pump.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen sowie der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung ein bevorzugtes Ausführungsbeispiel im Einzelnen beschrieben ist. Dabei können die in der Zeichnung dargestellten sowie in der Beschreibung und in den Ansprüchen erwähnten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungswesentlich sein.Further advantages, features and details of the invention will become apparent from the subclaims and the following description, in which a preferred embodiment is described in detail with reference to the drawing. The features shown in the drawing and mentioned in the description and in the claims may each be essential to the invention individually or in any combination.

In der Zeichnung zeigen:

Figur 1
eine perspektivische, teilweise aufgebrochene Darstellung einer Rotorpumpe
Figur 2
eine perspektivische Darstellung einer bevorzugten Ausführungsform des erfindungsgemäßen Flügels; und
Figur 3
eine vergrößerte Wiedergabe des linken Endes des Flügels mit vom Flügelkörper beabstandeter Flügelspitze.
In the drawing show:
FIG. 1
a perspective, partially broken view of a rotor pump
FIG. 2
a perspective view of a preferred embodiment of the wing according to the invention; and
FIG. 3
an enlarged view of the left end of the wing with wing tip spaced from the wing body.

Die Figur 1 zeigt eine insgesamt mit 2 bezeichnete Rotorpumpe, die in bekannter Weise ein Pumpengehäuse 10, einen in dessen z.B. teilkreiszylindrischen Pumpenraum 12 exzentrisch drehbar gelagerten Rotor 16, der mit einer Antriebswelle 14 drehfest verbunden ist, sowie einen in diesem radial verschieblich gelagerten Flügel 18, der an seinen freien Enden 20 jeweils eine Flügelspitze 22 aufweist. Eine derartige Rotorpumpe 2 ist z.B. aus der EP 1 471 255 A1 bekannt.The FIG. 1 shows a generally designated 2 rotor pump, in a known manner, a pump housing 10, a rotatably mounted in the example teilkreiszylindrischen pump chamber 12 rotatably mounted rotor 16 which is rotatably connected to a drive shaft 14, and a radially displaceably mounted in this wing 18, the its free ends 20 each have a wing tip 22. Such a rotor pump 2 is for example from the EP 1 471 255 A1 known.

Der Rotor 18 weist einen hohlzylindrischen Rotormantel 24 auf, in dem der Flügel 18 radial verschieblich aufgenommen ist. Der Pumpenraum 12 ist, was einfachheitshalber nicht gezeigt ist, an beiden Stirnseiten dicht verschlossen, wobei die Antriebswelle 14 die eine Gehäusestirnwand flüssigkeitsdicht durchsetzt. Am Pumpenraum 12 sind außerdem eine Zufluss- und eine Abflussleitung angeschlossen, um ein zu förderndes Strömungsmittel der Rotorpumpe 2 zu- und aus dieser wieder abführen zu können.The rotor 18 has a hollow cylindrical rotor shell 24, in which the wing 18 is received radially displaceable. The pump chamber 12 is, which is not shown for simplicity, sealed at both ends, wherein the drive shaft 14 which penetrates a housing end wall liquid-tight. In addition, an inflow and an outflow line are connected to the pump chamber 12 in order to be able to supply a fluid to be pumped from the rotor pump 2 and to be able to discharge it again.

Die Figur 2 zeigt den Flügel 18, der einen Flügelkörper 26 aufweist, an dessen beiden freien Enden 20 die Flügelspitzen 22 vorgesehen sind, die in Aufnahmetaschen 28 eingesetzt sind. Dabei nehmen die Aufnahmetaschen 28 die Flügelspitzen 22 vorzugsweise spielfrei auf. Die Aufnahmetaschen 28 sind so ausgeführt, dass sie in Längsrichtung 30 gesehen keine Hinterschneidung mit der Flügelspitze 22 bilden.The FIG. 2 shows the wing 18, which has a wing body 26, at its two free ends 20, the wing tips 22 are provided, which are inserted into receiving pockets 28. The receiving pockets 28 take the wing tips 22 preferably free of play. The receiving pockets 28 are so executed that they do not form an undercut with the wing tip 22 seen in the longitudinal direction 30.

Die Flügelspitze 22, die in Figur 3 in vergrößerter Darstellung wiedergegeben ist, besitzt eine Einsenkung 32, die einer Taschenwand 34 gegenüberliegt. Dabei besitzt die Taschenwand 34 einen in der Figur 2 gestrichelt dargestellten plastisch verformbaren Bereich 36, der senkrecht zur Längsrichtung 30 gesehen, das heißt in Dickenrichtung des Flügels 18, mit der Aufnahmetasche 28 fluchtet. Dieser Bereich 36 ist mittels eines geeigneten Krimp- oder Presswerkzeugs, welches in Richtung 38, das heißt in Dickenrichtung des Flügels 18, in die Aufnahmetasche 28 verformbar. Dabei wird Material des Bereichs 36 in die Einsenkung 32 verdrängt. Hierdurch wird sowohl in Richtung der Längsachse 30 als auch in Breitenrichtung 40 des Flügels 18 ein Hintergriff geschaffen, der verhindert, dass die Flügelspitze 22 der Aufnahmetasche 28 des Flügelkörpers 26 entnommen werden kann. Die Flügelspitze 22 ist also am Flügelkörper 26 fixiert.The wingtip 22, the in FIG. 3 is shown in enlarged scale, has a recess 32 which is opposite to a pocket wall 34. The pocket wall 34 has a in the FIG. 2 shown in phantom plastically deformable region 36, which is perpendicular to the longitudinal direction 30 seen, that is in the thickness direction of the wing 18, aligned with the receiving pocket 28. This region 36 is deformable in the receiving pocket 28 by means of a suitable crimping or pressing tool which can be deformed in the direction 38, that is to say in the thickness direction of the wing 18. In this case, material of the region 36 is displaced into the depression 32. As a result, a rear grip is created both in the direction of the longitudinal axis 30 and in the width direction 40 of the wing 18, which prevents the wing tip 22 of the receiving pocket 28 of the wing body 26 can be removed. The wing tip 22 is thus fixed to the wing body 26.

Dabei kann die Einsenkung 32 mit einem elastischen Material, zum Beispiel einem Kunststoffmaterial angefüllt sein, welches verdrängt wird, sobald vom Flügelkörper 26 Material aus dem Bereich 36 in die Einsenkung 32 eingeformt wird.In this case, the depression 32 may be filled with an elastic material, for example a plastic material, which is displaced as soon as material from the region 36 is molded into the depression 32 by the wing body 26.

Vorteilhaft sind an beiden Taschenwänden 34 derartige Bereiche 36 vorgesehen und entsprechend weist die Flügelspitze 22 zwei diesen Bereichen 36 gegenüberliegende Einsenkungen 32 auf.Such areas 36 are advantageously provided on both pocket walls 34, and correspondingly, the wing tip 22 has two depressions 32 opposite these areas 36.

Bei verschlissener Flügelspitze 22, zum Beispiel im Reparaturfall, wird die Flügelspitze 22 mittels eines geeigneten Werkzeugs entweder in Längsrichtung 30 aus der Aufnahmetasche 28 herausgezogen oder in Breitenrichtung 40 herausgedrückt. Der Formschluss zwischen Flügelkörper 26 und Flügelspitze 22 wird dabei aufgehoben. Nach dem Einsetzen einer neuer Flügelspitze 22 wird Material aus der Taschenwand 34 im Bereich 36 erneut in die Einsenkung 32 verdrängt. Hierdurch wird eine einfache Möglichkeit für die Wiederherstellung eines verschlissenen Flügels 18 geschaffen. Außerdem wird die Flügelspitze 22 auf einfache aber sichere Weise am Flügelkörper 26 gehalten.When worn wing tip 22, for example in case of repair, the wing tip 22 is either pulled out of the receiving pocket 28 in the longitudinal direction 30 or pushed out in the width direction 40 by means of a suitable tool. The positive connection between the wing body 26 and wing tip 22 is canceled. After inserting a new wing tip 22 material is displaced from the pocket wall 34 in the region 36 again in the recess 32. As a result, a simple way for the restoration of a worn wing 18 is created. In addition, the wing tip 22 is held in a simple but safe manner on the wing body 26.

Claims (5)

  1. Vane (18), for a rotor pump (2) having a casing (10) and a rotor (16) which is rotatably mounted therein, the vane (18) being displaceably mounted in the rotor (16) and bearing against an inner circumferential surface of the pump casing (10) by its tip (22) which projects out of the rotor (16) and which is provided on a main body (26) of the vane, the tip (22) of the vane being a separate component, the tip (22) of the vane and the main body (26) of the vane being connected together by positive interengagement looking in the longitudinal direction (30) of the main body (26) of the vane, the tip (22) of the vane or the main body (26) of the vane having a receiving pocket (28) for a portion of the main body (26) of the vane or of the tip (22) of the vane, and the receiving pocket (28) being flanked by a wall (34) of the pocket, characterised in that the positive interengagement is a crimped connection and in that the wall (34) of the pocket has a plastically deformable region (36), and in that the plastically deformable region (36) can be plastically deformed towards the receiving pocket (28) by virtue of the fact that the component which rests against the plastically deformable region (36) has a depression (32) into which the region (36) can be deformed.
  2. Vane according to claim 1, characterised in that the depression (32) is filled with an elastically deformable material.
  3. Vane according to either of the preceding claims, characterised in that the main body (26) of the vane has two tips (22).
  4. Rotor pump (2) having a vane (18) according to one of the preceding claims
  5. Rotor pump (2) according to claim 4, characterised in that it is a vacuum pump.
EP06792217A 2005-10-13 2006-09-22 Rotor pump and vane for a rotor pump Active EP1934480B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE200510050001 DE102005050001A1 (en) 2005-10-13 2005-10-13 rotor pump
DE102006016240A DE102006016240A1 (en) 2005-10-13 2006-03-31 Impeller for use in e.g. vacuum pump, has impeller tip protruding from rotor, and provided at impeller body, where impeller tip and impeller body are connected with each other in form-fit manner in longitudinal direction of impeller body
PCT/EP2006/009211 WO2007042134A1 (en) 2005-10-13 2006-09-22 Rotor pump and vane for a rotor pump

Publications (2)

Publication Number Publication Date
EP1934480A1 EP1934480A1 (en) 2008-06-25
EP1934480B1 true EP1934480B1 (en) 2011-01-26

Family

ID=37311939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06792217A Active EP1934480B1 (en) 2005-10-13 2006-09-22 Rotor pump and vane for a rotor pump

Country Status (3)

Country Link
EP (1) EP1934480B1 (en)
DE (1) DE502006008822D1 (en)
WO (1) WO2007042134A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3832042C2 (en) * 1987-10-05 1997-08-14 Barmag Barmer Maschf Vane pump
JPH11311188A (en) 1998-04-24 1999-11-09 Shinjo Seisakusho:Kk Vane of vane pump
DE10046697A1 (en) * 2000-09-21 2002-04-11 Bosch Gmbh Robert Plastic blades for a vane vacuum pump
WO2004074687A2 (en) * 2003-02-20 2004-09-02 Luk Automobiltechnik Gmbh & Co. Kg Vacuum pump with a plastic blade
EP1471255B1 (en) 2003-04-24 2005-07-20 Joma-Hydromechanic GmbH Vane pump
DE102004001840B3 (en) * 2004-01-07 2005-05-25 Joma-Hydromechanic Gmbh Positive-displacement pump comprises a blade having blade parts that engage with each other on facing side surfaces by a tongue and groove connection consisting of grooves and tongues that run orthogonally to a drive shaft
WO2006056162A1 (en) * 2004-11-27 2006-06-01 Ixetic Hückeswagen Gmbh Pump

Also Published As

Publication number Publication date
WO2007042134A1 (en) 2007-04-19
EP1934480A1 (en) 2008-06-25
DE502006008822D1 (en) 2011-03-10

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