EP1766238A1 - Single-winged vacuum pump - Google Patents

Single-winged vacuum pump

Info

Publication number
EP1766238A1
EP1766238A1 EP05733888A EP05733888A EP1766238A1 EP 1766238 A1 EP1766238 A1 EP 1766238A1 EP 05733888 A EP05733888 A EP 05733888A EP 05733888 A EP05733888 A EP 05733888A EP 1766238 A1 EP1766238 A1 EP 1766238A1
Authority
EP
European Patent Office
Prior art keywords
insert
vacuum pump
rotor
pump according
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05733888A
Other languages
German (de)
French (fr)
Other versions
EP1766238B1 (en
Inventor
Willi Schneider
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 Hydromechanic GmbH
Original Assignee
Joma Hydromechanic GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Joma Hydromechanic GmbH filed Critical Joma Hydromechanic GmbH
Publication of EP1766238A1 publication Critical patent/EP1766238A1/en
Application granted granted Critical
Publication of EP1766238B1 publication Critical patent/EP1766238B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • 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
    • F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
    • F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
    • 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
    • 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
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the invention relates to a single-wing vacuum pump with a cup-shaped housing, a rotor rotatably mounted eccentrically in the housing, and a rotatably mounted in the rotor orthogonal to the axis of rotation wings, which rests with its wing tips on a working space defining peripheral surface.
  • Vacuum pumps of such a construction have a housing in which a rotor is mounted, wherein the rotor is located within a working space.
  • This working space is subdivided by a rotor displaceably mounted in the rotor in a suction chamber and a pressure chamber.
  • the rotor is arranged in the working space that it touches the inner circumferential surface of the working space with its circular cylindrical peripheral surface. In the immediate vicinity of this contact point are the inlet and the outlet of the pump.
  • the suction chamber is thus formed by the edge of a wing tip and this point of contact. This has the consequence that the suction chamber increases with a rotation of the rotor until the next wing tip sweeps over the inlet.
  • Great efforts are made to achieve an optimum seal both in the area of the edge of the wing tip and in the rotor resting against the inner circumferential surface.
  • the invention is therefore based on the object to provide a single-wing vacuum pump of the type mentioned above, which has a better seal of the suction chamber.
  • This object is achieved according to the invention with a single-wing vacuum pump of the type mentioned in the introduction, in that a part of the peripheral surface is formed by an insert and that the rotor touches the insert.
  • the critical point at which the rotor contacts the inner peripheral surface of the working space is formed by an insert specially adapted to the requirements for an optimum seal.
  • the insert also has the advantage that it can be replaced relatively easily, so that in the case of a decreasing Dichtwirküng, which is caused by a wear-related larger gap, not a rotor with a larger outer diameter must be used, but only the insert must be replaced ,
  • the insert has a part-circular recess on its side facing the working space.
  • the circumferential surface of the rotor engages, so that the rotor rests on a circumferential portion of the insert, said peripheral portion is the seal.
  • the use can lie flat against the rotor, but there is also the possibility that the recess is provided with a structure, so that the insert rests on the rotor via a plurality of sealing lips.
  • the recess has a radius which is less than or equal to the radius of the adjacent rotor. At the same radius a relatively wide sealing gap is created, which is sealed by oil. In the other case, the sealing gap changes the gap height over its width, wherein sealing edges are produced at the ends of the sealing gap.
  • the insert consists of a more elastic material than the housing of the vacuum pump and / or the rotor.
  • the insert is made of plastic. This creates the possibility that the rotor bears under pretension on the insert and thereby the sealing gap is completely closed.
  • an abrasion-resistant plastic is used, which may possibly be fiber-reinforced.
  • the force can be applied mechanically, hydraulically, pneumatically and / or electrically. In a simple case, this may be a build-up of material on the back of the insert, for example knobs or the like. These knobs are elastically yielding, so that the insert rests resiliently on the rotor. However, the force can also be applied for example by a spring, in particular a leaf spring, which bears against the rear side of the insert. It is also conceivable, however, the application of hydraulic oil or compressed air or by means of an electromechanically extendable plunger.
  • the working space delimiting peripheral surface has an insert receiving recess.
  • This recess is like that designed such that the insert is held in the recess so as to be secure against loss and displacement, but remains elastically in the direction of the rotor.
  • the insert or the rotor-facing surface of the insert thereby passes continuously into the inner circumferential surface of the working space.
  • the means for applying force to the insert may be arranged in the recess.
  • the means for applying force is arranged outside the housing and passes through the housing wall in the direction of the insert.
  • the means for applying force causes the insert to be urged toward the rotor. This ensures that the insert is permanently applied to the rotor and thus an optimal seal.
  • a spring is provided in a simple embodiment.
  • it can also be provided a pressure pad, which is filled with a fluid.
  • the pressure pad can be integrated into the insert, in particular, the insert has a cavity which is filled with a fluid. If the cavity is open, the pressure of the fluid can be set to desired values.
  • the spring can be integrated into the insert.
  • Figure 1 is an exploded view of the vacuum pump
  • Figure 2 is a perspective view of the housing of the pump
  • Figure 3 is an enlarged view of an insert
  • Figure 4 is a perspective view of the housing according to Figure 2 with inserted rotor and wings.
  • a vacuum pump in which the housing 12 is shown without housing cover.
  • the housing 12 has a suction port 14, which opens into an interior 16.
  • a generally designated 18 rotor in which a wing 20 is mounted orthogonal to the axis of rotation 21 slidably.
  • the rotor 18 is constructed in two parts and has a rotor axis 22 and a rotor housing 24.
  • the rotor axis 22 passes through the housing 12, in particular a bottom 26 of the interior 18 via a drive opening 28 ( Figure 2) and protrudes with a rectangular portion 30 on the back of the housing 12 out, via which he (by means of a drive, not shown) in Rotation is offset.
  • the drive opening 28 is provided with suitable sealing means, so that neither lubricant leak nor air and / or dirt in the interior 16 can occur.
  • FIG. 1 shows that the interior 16 is delimited by an inner circumferential surface 32 against which the tips 34 of the wing 20 abut (FIG. 4).
  • the inner peripheral surface 32 has a recess 36, in which an insert 38 can be inserted ( Figures 2 and 3).
  • This insert 38 and thus also the recess 36 in the inner peripheral wall 32 are located in the region of a suction opening or inlet opening 40 and a pressure opening or outlet opening 42.
  • the shape of the insert 38 is chosen so that the circular cylindrical outer peripheral surface 44 of the rotor housing 24 over its entire Height at the insert 38 is applied.
  • the insert 38 has on its side facing the rotor 18 side 46 a cylinder-segment-shaped recess 48 whose radius is equal to or smaller than the radius of the cylindrical rotor housing 24. This ensures that the insert 38 over the entire width of the recess 48 on the rotor housing 24th is applied. Another advantage is that a seal is also made when the wing 20 receiving groove 50 of the rotor housing 24 passes over the insert 38.
  • two openings 52 can be seen in the recess 36, which are directed to the back of the insert 38.
  • the insert 38 can be pressurized, for example with oil or with a plunger, so that it is moved in the direction of the rotor housing 24.
  • the pressing force of the insert on the outer peripheral surface 44 of the rotor housing 24 is influenced.
  • a spring element is arranged, which urges the insert 38 in the direction of the rotor housing 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)

Abstract

The invention relates to a single-winged vacuum pump provided with a pot-shaped housing (12), a rotor (18) which is mounted in a rotational and eccentric manner in the housing, and a wing which is displacably mounted in the rotor and which is orthogonal on the rotational axis (21), whereby the points of the wing (34) are placed on a peripheral surface (32) which defines a work chamber. The invention is characterised in that one part of the peripheral surface (32) is formed by an insert and the rotor (18) touches the insert.

Description

Titel: EinflügelvakuumpumpeTitle: Single-wing vacuum pump
Beschreibungdescription
Die Erfindung betrifft eine Einflügelvakuumpumpe mit einem topfförmigen Gehäuse, einem exzentrisch im Gehäuse drehbar gelagerten Rotor, und einem im Rotor orthogonal zur Drehachse verschieblich gelagerten Flügel, der mit seinen Flügelspitzen an einer einen Arbeitsraum begrenzenden Umfangsflache anliegt.The invention relates to a single-wing vacuum pump with a cup-shaped housing, a rotor rotatably mounted eccentrically in the housing, and a rotatably mounted in the rotor orthogonal to the axis of rotation wings, which rests with its wing tips on a working space defining peripheral surface.
Vakuumpumpen mit einem derartigen Aufbau sind bekannt. Sie weisen ein Gehäuse auf, in welchem ein Rotor gelagert ist, wobei der Rotor sich innerhalb eines Arbeitsraumes befindet. Dieser Arbeitsraum wird von einem im Rotor verschieblich gelagerten Flügel in einen Saugraum und einen Druckraum unterteilt. Außerdem ist der Rotor derart im Arbeitsraum angeordnet, dass er mit seiner kreiszylindrischen Umfangsflache die Innenumfangsflache des Arbeitsraumes berührt. In unmittelbarer Nachbarschaft dieser Berührungsstelle befinden sich der Einlass und der Auslass der Pumpe. Der Saugraum wird also von der Kante einer Flügelspitze sowie dieser Berührungsstelle gebildet. Dies hat zur Folge, dass sich der Saugraum bei einer Drehung des Rotors so lange vergrößert, bis die nächste Flügelspitze den Einlass überstreicht. Es werden große Anstrengungen unternommen, um sowohl im Bereich der Kante der Flügelspitze als auch beim an der Innenumfangsflache anliegenden Rotor eine optimale Abdichtung zu erzielen.Vacuum pumps of such a construction are known. They have a housing in which a rotor is mounted, wherein the rotor is located within a working space. This working space is subdivided by a rotor displaceably mounted in the rotor in a suction chamber and a pressure chamber. In addition, the rotor is arranged in the working space that it touches the inner circumferential surface of the working space with its circular cylindrical peripheral surface. In the immediate vicinity of this contact point are the inlet and the outlet of the pump. The suction chamber is thus formed by the edge of a wing tip and this point of contact. This has the consequence that the suction chamber increases with a rotation of the rotor until the next wing tip sweeps over the inlet. Great efforts are made to achieve an optimum seal both in the area of the edge of the wing tip and in the rotor resting against the inner circumferential surface.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Einflügelvakuumpumpe der eingangs genannten Art bereit zu stellen, die eine bessere Abdichtung des Saugraumes besitzt. Diese Aufgabe wird mit einer Einflügelvakuumpumpe der eingangs genannten Art erfindungsgemäß dadurch erzielt, dass ein Teil der Umfangsflache von einem Einsatz gebildet wird und dass der Rotor den Einsatz berührt.The invention is therefore based on the object to provide a single-wing vacuum pump of the type mentioned above, which has a better seal of the suction chamber. This object is achieved according to the invention with a single-wing vacuum pump of the type mentioned in the introduction, in that a part of the peripheral surface is formed by an insert and that the rotor touches the insert.
Bei der erfindungsgemäßen Ausgestaltung der Pumpe wird die kritische Stelle, an welcher der Rotor die Innenumfangsflache des Arbeitsraumes berührt, von einem speziell an die Anforderungen für eine optimale Dichtung angepassten Einsatz gebildet. Der Einsatz hat zudem den Vorteil, dass er relativ einfach ausgewechselt werden kann, sodass im Falle einer nachlassenden Dichtwirküng, welche durch einen verschleißbedingten größeren Spalt hervorgerufen wird, nicht mehr ein Rotor mit einem größeren Außendurchmesser eingesetzt werden muss, sondern lediglich der Einsatz ausgewechselt werden muss .In the embodiment of the pump according to the invention, the critical point at which the rotor contacts the inner peripheral surface of the working space is formed by an insert specially adapted to the requirements for an optimum seal. The insert also has the advantage that it can be replaced relatively easily, so that in the case of a decreasing Dichtwirküng, which is caused by a wear-related larger gap, not a rotor with a larger outer diameter must be used, but only the insert must be replaced ,
Bei einer Weiterbildung ist vorgesehen, dass der Einsatz an seiner den Arbeitsraum zugewandten Seite eine teilkreisförmige Ausnehmung aufweist. In diese Ausnehmung greift die Umfangsflache des Rotors ein, sodass der Rotor über einen Umfangsabschnitt am Einsatz anliegt, wobei dieser Umfangsabschnitt die Dichtung darstellt. Dabei kann der Einsatz flächig am Rotor anliegen, es besteht jedoch auch die Möglichkeit, dass die Ausnehmung mit einer Struktur versehen ist, sodass der Einsatz über mehrere Dichtlippen am Rotor anliegt.In a further development, it is provided that the insert has a part-circular recess on its side facing the working space. In this recess, the circumferential surface of the rotor engages, so that the rotor rests on a circumferential portion of the insert, said peripheral portion is the seal. In this case, the use can lie flat against the rotor, but there is also the possibility that the recess is provided with a structure, so that the insert rests on the rotor via a plurality of sealing lips.
Mit Vorzug besitzt die Ausnehmung einen Radius, der kleiner oder gleich dem Radius des anliegenden Rotors ist. Bei gleichem Radius wird ein relativ breiter Dichtspalt geschaffen, der durch Öl abgedichtet wird. Im anderen Falle ändert der Dichtspalt die Spalthöhe über seine Breite, wobei an den Enden des Dichtspaltes Dichtkanten erzeugt werden. Dies hat den Vorteil, dass das den Dichtspalt abdichtende Öl im Dichtspalt verbleibt und konkrete Dichtkanten existieren. Ein besonders bevorzugtes Ausführungsbeispiel sieht vor, dass der Einsatz aus einem elastischeren Material besteht, als das Gehäuse der Vakuumpumpe und/oder des Rotors. Insbesondere besteht der Einsatz aus Kunststoff. Hierdurch wird die Möglichkeit geschaffen, dass der Rotor unter Vorspannung am Einsatz anliegt und dadurch der Dichtspalt vollständig geschlossen wird. Für den Einsatz wird vorzugsweise ein abriebfester Kunststoff verwendet, der ggf. noch faserverstärkt sein kann.With preference, the recess has a radius which is less than or equal to the radius of the adjacent rotor. At the same radius a relatively wide sealing gap is created, which is sealed by oil. In the other case, the sealing gap changes the gap height over its width, wherein sealing edges are produced at the ends of the sealing gap. This has the advantage that the sealing gap sealing oil remains in the sealing gap and concrete sealing edges exist. A particularly preferred embodiment provides that the insert consists of a more elastic material than the housing of the vacuum pump and / or the rotor. In particular, the insert is made of plastic. This creates the possibility that the rotor bears under pretension on the insert and thereby the sealing gap is completely closed. For use, preferably an abrasion-resistant plastic is used, which may possibly be fiber-reinforced.
Eine weitere Optimierung der Abdichtung wird dadurch erreicht, dass der Einsatz in Richtung auf den Rotor kraftbeaufschlagt ist. Hierdurch wird ein eventueller Verschleiß ausgeglichen und dadurch gewährleistet, dass auch über einen längeren Zeitraum der Rotor am Einsatz anliegt und dadurch der Dichtspalt geschlossen bleibt.Further optimization of the seal is achieved by applying force in the direction of the rotor. As a result, any wear is compensated and thereby ensures that even over a longer period of time the rotor rests against the insert and thereby the sealing gap remains closed.
Dabei kann die Kraft mechanisch, hydraulisch, pneumatisch und/oder elektrisch aufgebracht werden. Dies kann in einem einfachen Fall eine auf der Rückseite des Einsatzes vorgesehene Materialanhäufung sein, zum Beispiel Noppen oder dergleichen. Diese Noppen sind elastisch nachgiebig ausgebildet, sodass der Einsatz federnd nachgiebig am Rotor anliegt. Die Kraft kann aber auch zum Beispiel von einer Feder, insbesondere einer Blattfeder aufgebracht werden, die an der Rückseite des Einsatzes anliegt. Denkbar ist aber auch die Beaufschlagung des Einsatzes mit Hydrauliköl oder Druckluft oder mittels eines elektromechanisch ausfahrbaren Stößels.The force can be applied mechanically, hydraulically, pneumatically and / or electrically. In a simple case, this may be a build-up of material on the back of the insert, for example knobs or the like. These knobs are elastically yielding, so that the insert rests resiliently on the rotor. However, the force can also be applied for example by a spring, in particular a leaf spring, which bears against the rear side of the insert. It is also conceivable, however, the application of hydraulic oil or compressed air or by means of an electromechanically extendable plunger.
Um zu gewährleisten, dass die über die Umfangsflache des Arbeitsraums streifende Flügelkante problemlos den Einsatz überfahren kann' ist vorgesehen, dass das Gehäuse in ihrer, den Arbeitsraum begrenzenden Umfangsflache eine den Einsatz aufnehmende Ausnehmung aufweist. Diese Ausnehmung ist so gestaltet, dass der Einsatz verlier- und verschiebesicher in der Ausnehmung gehalten wird, jedoch elastisch in Richtung auf den Rotor verbleibt. Der Einsatz bzw. die dem Rotor zugewandte Fläche des Einsatzes geht dabei stufenlos in die Innenumfangsflache des Arbeitsraumes über.In order to ensure that the over the circumferential surface of the working space grazing wing edge can easily run over the insert ' is provided that the housing in its, the working space delimiting peripheral surface has an insert receiving recess. This recess is like that designed such that the insert is held in the recess so as to be secure against loss and displacement, but remains elastically in the direction of the rotor. The insert or the rotor-facing surface of the insert thereby passes continuously into the inner circumferential surface of the working space.
Dabei kann bei einem ersten Ausführungsbeispiel das Mittel zur Kraftbeaufschlagung des Einsatzes in der Ausnehmung angeordnet sein. Bei einer anderen Ausführungsform ist das Mittel zur Kraftbeaufschlagung außerhalb des Gehäuses angeordnet und durchgreift die Gehäusewand in Richtung auf den Einsatz. Auf jeden Fall bewirkt das Mittel zur Kraftbeaufschlagung, dass der Einsatz in Richtung auf den Rotor gedrängt wird. Dadurch wird gewährleistet, dass der Einsatz permanent am Rotor anliegt und dadurch eine optimale Abdichtung erfolgt.In this case, in a first embodiment, the means for applying force to the insert may be arranged in the recess. In another embodiment, the means for applying force is arranged outside the housing and passes through the housing wall in the direction of the insert. In any event, the means for applying force causes the insert to be urged toward the rotor. This ensures that the insert is permanently applied to the rotor and thus an optimal seal.
Wie bereits erwähnt, ist in einer einfachen Ausführungsform eine Feder vorgesehen. Es kann jedoch auch ein Druckkissen vorgesehen sein, welches mit einem Fluid angefüllt ist. Dabei kann das Druckkissen in den Einsatz integriert sein, insbesondere besitzt der Einsatz einen Hohlraum, der mit einem Fluid angefüllt wird. Ist der Hohlraum offen, so kann der Druck des Fluides auf gewünschte Werte eingestellt werden. Selbstverständlich kann auch die Feder in den Einsatz integriert sein.As already mentioned, a spring is provided in a simple embodiment. However, it can also be provided a pressure pad, which is filled with a fluid. In this case, the pressure pad can be integrated into the insert, in particular, the insert has a cavity which is filled with a fluid. If the cavity is open, the pressure of the fluid can be set to desired values. Of course, the spring can be integrated into the insert.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen sowie der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung ein besonders 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. In der Zeichnung zeigen:Further advantages, features and details of the invention will become apparent from the subclaims and the following description in which, with reference to the drawing, a particularly preferred embodiment is described in detail. 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 the drawing show:
Figur 1 eine Explosionsdarstellung der Vakuumpumpe;Figure 1 is an exploded view of the vacuum pump;
Figur 2 eine perspektivische Ansicht des Gehäuses der Pumpe;Figure 2 is a perspective view of the housing of the pump;
Figur 3 eine vergrößerte Wiedergabe eines Einsatzes; undFigure 3 is an enlarged view of an insert; and
Figur 4 eine perspektivische Ansicht des Gehäuses gemäß Figur 2 mit eingesetztem Rotor und Flügel.Figure 4 is a perspective view of the housing according to Figure 2 with inserted rotor and wings.
In der Figur 1 ist mit dem Bezugszeichen 10 eine Vakuumpumpe bezeichnet, bei welcher das Gehäuse 12 ohne Gehäusedeckel dargestellt ist. Das Gehäuse 12 besitzt einen Sauganschluss 14, der in einen Innenraum 16 ausmündet. In diesem Innenraum 16 befindet sich ein insgesamt mit 18 bezeichneter Rotor, in welchem ein Flügel 20 orthogonal zur Drehachse 21 verschieblich gelagert ist. Der Rotor 18 ist zweiteilig aufgebaut und weist eine Rotorachse 22 und ein Rotorgehäuse 24 auf. Die Rotorachse 22 durchgreift das Gehäuse 12, insbesondere einen Boden 26 des Innenraums 18 über eine Antriebsöffnung 28 (Figur 2) und ragt mit einem rechteckförmigen Abschnitt 30 auf der Rückseite aus dem Gehäuse 12 heraus, über welchen er (mittels eines nicht dargestellten Antriebs) in Drehung versetzt wird. Die Antriebsöffnung 28 ist mit geeigneten Dichtmitteln versehen, sodass weder Schmiermittel austreten noch Luft und/oder Schmutz in den Innenraum 16 eintreten kann.In the figure 1 is denoted by the reference numeral 10, a vacuum pump, in which the housing 12 is shown without housing cover. The housing 12 has a suction port 14, which opens into an interior 16. In this interior 16 is a generally designated 18 rotor, in which a wing 20 is mounted orthogonal to the axis of rotation 21 slidably. The rotor 18 is constructed in two parts and has a rotor axis 22 and a rotor housing 24. The rotor axis 22 passes through the housing 12, in particular a bottom 26 of the interior 18 via a drive opening 28 (Figure 2) and protrudes with a rectangular portion 30 on the back of the housing 12 out, via which he (by means of a drive, not shown) in Rotation is offset. The drive opening 28 is provided with suitable sealing means, so that neither lubricant leak nor air and / or dirt in the interior 16 can occur.
Die Figur 1 zeigt, dass der Innenraum 16 von einer Innenumfangsflache 32 begrenzt ist, an welcher die Spitzen 34 des Flügels 20 anliegen (Figur 4) . Außerdem weist die Innenumfangsflache 32 eine Ausnehmung 36 auf, in welche ein Einsatz 38 eingeschoben werden kann (Figuren 2 und 3) . Dieser Einsatz 38 und somit auch die Ausnehmung 36 in der Innenumfangswand 32 befinden sich im Bereich einer Saugöffnung oder Einlassöffnung 40 und einer Drucköffnung oder Auslassöffnung 42. Die Form des Einsatzes 38 ist dabei so gewählt, dass die kreiszylindrische Außenumfangsflache 44 des Rotorgehäuses 24 über seine gesamte Höhe am Einsatz 38 anliegt. Dabei besitzt der Einsatz 38 an seiner dem Rotor 18 zugewandten Seite 46 eine zylindersegmentförmige Ausnehmung 48, deren Radius gleich oder kleiner ist als der Radius des zylinderförmigen Rotorgehäuses 24. Hierdurch wird gewährleistet, dass der Einsatz 38 über die gesamte Breite der Ausnehmung 48 am Rotorgehäuse 24 anliegt. Ein weiterer Vorteil besteht darin, dass eine Abdichtung auch dann erfolgt, wenn die den Flügel 20 aufnehmende Nut 50 des Rotorgehäuses 24 den Einsatz 38 überfährt.FIG. 1 shows that the interior 16 is delimited by an inner circumferential surface 32 against which the tips 34 of the wing 20 abut (FIG. 4). In addition, the inner peripheral surface 32 has a recess 36, in which an insert 38 can be inserted (Figures 2 and 3). This insert 38 and thus also the recess 36 in the inner peripheral wall 32 are located in the region of a suction opening or inlet opening 40 and a pressure opening or outlet opening 42. The shape of the insert 38 is chosen so that the circular cylindrical outer peripheral surface 44 of the rotor housing 24 over its entire Height at the insert 38 is applied. In this case, the insert 38 has on its side facing the rotor 18 side 46 a cylinder-segment-shaped recess 48 whose radius is equal to or smaller than the radius of the cylindrical rotor housing 24. This ensures that the insert 38 over the entire width of the recess 48 on the rotor housing 24th is applied. Another advantage is that a seal is also made when the wing 20 receiving groove 50 of the rotor housing 24 passes over the insert 38.
In Figur 2 sind in der Ausnehmung 36 zwei Öffnungen 52 erkennbar, welche auf die Rückseite des Einsatzes 38 gerichtet sind. Über diese Öffnungen 52 kann der Einsatz 38 zum Beispiel mit Öl oder mit einem Stößel mit Druck beaufschlagt werden, sodass er in Richtung des Rotorgehäuses 24 bewegt wird. Hierdurch wird die Andruckkraft des Einsatzes an der Außenumfangsflache 44 des Rotorgehäuses 24 beeinflusst. Es ist aber auch denkbar, dass zwischen dem Grund der Ausnehmung 36 und dem Einsatz 38 ein Federelement angeordnet ist, welches den Einsatz 38 in Richtung des Rotorgehäuses 24 drängt.In Figure 2, two openings 52 can be seen in the recess 36, which are directed to the back of the insert 38. Via these openings 52, the insert 38 can be pressurized, for example with oil or with a plunger, so that it is moved in the direction of the rotor housing 24. As a result, the pressing force of the insert on the outer peripheral surface 44 of the rotor housing 24 is influenced. But it is also conceivable that between the bottom of the recess 36 and the insert 38, a spring element is arranged, which urges the insert 38 in the direction of the rotor housing 24.
Zusammenfassend kann festgestellt werden, dass über den Einsatz 38 eine optimale Abdichtung eines Saugraumes 54 gegenüber einem Druckraum 56 erfolgt, da die Außenumfangsflache 44 des Rotorgehäuses 24 permanent am Einsatz 38 anliegt. In summary, it can be stated that an optimum sealing of a suction chamber 54 with respect to a pressure chamber 56 takes place via the insert 38, since the outer circumferential surface 44 of the rotor housing 24 rests permanently on the insert 38.

Claims

Patentansprüche claims
1. Einflügelvakuumpumpe mit einem topfförmigen Gehäuse (12), einem exzentrisch im Gehäuse (12) drehbar gelagerten Rotor (18) , und einem im Rotor (18) orthogonal zur Drehachse (21) verschieblich gelagerten Flügel (20), der mit seinen Flügelspitzen an einer einen Arbeitsraum begrenzenden Umfangsflache (32) anliegt, dadurch gekennzeichnet, dass ein Teil der Umfangsflache (32) von einem Einsatz (38) gebildet wird und dass der Rotor (18) den Einsatz (38) berührt.1. single-wing vacuum pump with a cup-shaped housing (12), an eccentrically in the housing (12) rotatably mounted rotor (18), and in the rotor (18) orthogonal to the axis of rotation (21) slidably mounted wings (20), with its wing tips a peripheral surface (32) delimiting a working space, characterized in that a part of the peripheral surface (32) is formed by an insert (38) and that the rotor (18) touches the insert (38).
2. Einflügelvakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Einsatz (38) an seiner den Arbeitsraum zugewandten Seite eine teilzylinderfÖrmige Ausnehmung (48) aufweist.2. single-wing vacuum pump according to one of the preceding claims, characterized in that the insert (38) on its side facing the working space a teilzylinderfÖrmige recess (48).
3. Einflügelvakuumpumpe nach Anspruch 3, dadurch gekennzeichnet, dass die Ausnehmung (48) einen Radius besitzt, der kleiner oder gleich dem Radius des anliegenden Rotors (18) ist.3. single-wing vacuum pump according to claim 3, characterized in that the recess (48) has a radius which is less than or equal to the radius of the adjacent rotor (18).
4. Einflügelvakuumpumpe nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass die Ausnehmung (48) konkav geformt ist.4. single-wing vacuum pump according to claim 3 or 4, characterized in that the recess (48) is concave.
5. Einflügelvakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Einsatz (38) aus einem elastischeren Material besteht, als das Gehäuse (12) der Vakuumpumpe (10) und/oder des Rotors (18) .5. single-vane vacuum pump according to one of the preceding claims, characterized in that the insert (38) consists of a more elastic material than the housing (12) of the vacuum pump (10) and / or the rotor (18).
6. Einflügelvakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Einsatz (38) aus Kunststoff besteht. 6. single-wing vacuum pump according to one of the preceding claims, characterized in that the insert (38) consists of plastic.
7. Einflügelvakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Einsatz (38) in Richtung auf den Rotor (18) kraftbeaufschlagt ist.7. single-vane vacuum pump according to one of the preceding claims, characterized in that the insert (38) in the direction of the rotor (18) is subjected to force.
8. Einflügelvakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kraftbeaufschlagung mechanisch, hydraulisch, pneumatisch und/oder elektrisch erfolgt.8. single-vane vacuum pump according to one of the preceding claims, characterized in that the force is applied mechanically, hydraulically, pneumatically and / or electrically.
9. Einflügelvakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Gehäuse (12) in ihrer, den Arbeitsraum begrenzenden Umfangsflache (32) eine den Einsatz (38) aufnehmende Ausnehmung (3'6) aufweist.9. single-vane vacuum pump according to one of the preceding claims, characterized in that the housing (12) in its, the working space bounding peripheral surface (32) has an insert (38) receiving recess (3'6).
10. Einflügelvakuumpumpe nach Anspruch 8 und 9, dadurch gekennzeichnet, dass das Mittel zur Kraftbeaufschlagung des Einsatzes (38) in der Ausnehmung (36) angeordnet ist.10. single-wing vacuum pump according to claim 8 and 9, characterized in that the means for applying force to the insert (38) in the recess (36) is arranged.
11. Einflügelvakuumpumpe nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass das Mittel zur Kraftbeaufschlagung außerhalb des Gehäuses (12) angeordnet ist und die Gehäusewand in Richtung auf den Einsatz (38) durchgreift .11. single-vane vacuum pump according to claim 7 or 8, characterized in that the means for applying force outside of the housing (12) is arranged and the housing wall in the direction of the insert (38) passes through.
12. Einflügelvakuumpumpe nach einem der Ansprüche 7 bis 11, dadurch gekennzeichnet, dass das Mittel zur Kraftbeaufschlagung eine Feder oder ein Druckkissen ist. 12. single-wing vacuum pump according to one of claims 7 to 11, characterized in that the means for applying force is a spring or a pressure pad.
EP05733888A 2004-07-09 2005-04-20 Single-winged vacuum pump Active EP1766238B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004034922A DE102004034922B4 (en) 2004-07-09 2004-07-09 A single-blade
PCT/EP2005/004213 WO2006005384A1 (en) 2004-07-09 2005-04-20 Single-winged vacuum pump

Publications (2)

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EP1766238A1 true EP1766238A1 (en) 2007-03-28
EP1766238B1 EP1766238B1 (en) 2008-01-16

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EP (1) EP1766238B1 (en)
KR (1) KR101190436B1 (en)
CN (1) CN100491734C (en)
CA (1) CA2575781A1 (en)
DE (2) DE102004034922B4 (en)
WO (1) WO2006005384A1 (en)

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DE102014107735B4 (en) * 2014-06-02 2018-04-19 Schwäbische Hüttenwerke Automotive GmbH Wing with axial seal
WO2018217173A1 (en) * 2017-05-25 2018-11-29 Nanyang Technological University Rotary vane apparatus
CN107355380A (en) * 2017-08-18 2017-11-17 宁波拓普智能刹车系统有限公司 A kind of automobile single blade formula electronic vacuum pump installation

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DE102004034922A1 (en) 2006-02-02
DE502005002583D1 (en) 2008-03-06
CN100491734C (en) 2009-05-27
EP1766238B1 (en) 2008-01-16
WO2006005384A1 (en) 2006-01-19
CN101002021A (en) 2007-07-18
KR101190436B1 (en) 2012-10-11
DE102004034922B4 (en) 2006-05-11
KR20070034089A (en) 2007-03-27
CA2575781A1 (en) 2006-01-19

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