EP1766239A1 - Single-winged vacuum pump - Google Patents

Single-winged vacuum pump

Info

Publication number
EP1766239A1
EP1766239A1 EP05739759A EP05739759A EP1766239A1 EP 1766239 A1 EP1766239 A1 EP 1766239A1 EP 05739759 A EP05739759 A EP 05739759A EP 05739759 A EP05739759 A EP 05739759A EP 1766239 A1 EP1766239 A1 EP 1766239A1
Authority
EP
European Patent Office
Prior art keywords
vacuum pump
pump according
insert
housing
outlet opening
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
EP05739759A
Other languages
German (de)
French (fr)
Other versions
EP1766239B1 (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 EP1766239A1 publication Critical patent/EP1766239A1/en
Application granted granted Critical
Publication of EP1766239B1 publication Critical patent/EP1766239B1/en
Expired - Fee Related 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
    • F04C29/128—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type of the elastic type, e.g. reed valves
    • 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
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/028—Means for improving or restricting lubricant flow
    • 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 single-wing vacuum pump with a cup-shaped housing, a rotor rotatably mounted eccentrically in the housing, a rotatably mounted in the rotor orthogonal to the axis of rotation, which rests with its wing tips on a working space defining peripheral surface and thereby dividing the working space into a suction chamber and a pressure chamber , And the suction chamber with an air inlet opening and the pressure chamber are provided with an air outlet opening.
  • Vacuum pumps of such a construction are known. They usually have a housing in which a rotor is rotatably mounted, wherein the rotor is located in a working space. Such vacuum pumps are u.a. also used in vehicles, where, for example, the motor of the motor vehicle rotates the rotor. These vacuum pumps are lubricated with oil, which also serves to seal the sealing gap between the wing and working space. It is desirable that as little as possible oil is led out of the air outlet opening of the pressure chamber from the working space.
  • the invention has for its object to provide a single-wing vacuum pump, in which the air leaving the pressure chamber is loaded with less oil.
  • the air outlet opening is in the peripheral surface surrounding the pressure chamber and not, as in the prior art, in the bottom of the pressure chamber, which is penetrated by the rotor.
  • the arrangement of the outlet opening in the peripheral wall of the essential advantage is provided that the size of the opening cross-section can be made larger than when the outlet opening is provided in the bottom.
  • the pressure chamber is emptied faster and expelling the sucked air from the pressure chamber less energy is needed.
  • a gradual opening can be effected. For example, the opening edge may be skewed so that the outlet opening is initially available with a small cross-section that gradually increases. As a result, pressure surges are avoided.
  • an exhaust valve connects directly to the air outlet opening.
  • the outlet valve is arranged in the peripheral wall of the housing. This arrangement is very space-saving and it is avoided that the housing is externally provided with attachments.
  • the exhaust valve is a leaf spring valve.
  • Such valves are responsive, require a very small amount of space and are above all inexpensive. If the back of the exhaust valve is flat, then it settles the leaf spring valve optimally to the edge of the outlet, without the need for special Anpress Anlagenn. The exhaust valve is thus closed in the suction and opens to expel the air.
  • the air outlet opening is provided with an insert, wherein the insert forms part of the peripheral surface of the pressure chamber or is integrated in the housing wall.
  • the insert forms part of the peripheral surface of the pressure chamber or is integrated in the housing wall.
  • a variant according to the invention provides that an oil outlet opening is provided in the peripheral surface surrounding the suction space. Rotates the rotor, for whatever reason, backwards, then in the suction chamber accumulating lubricating oil can be removed from this ⁇ lauslassö réelle because the suction prevents a corresponding valve that already sucked air and lubricating oil are ejected again. This air and the lubricating oil can now escape through the oil outlet.
  • the outlet valve directly adjoins the oil outlet opening. This valve prevents air and / or oil from being drawn in through the oil outlet when the pump is in normal operation.
  • the outlet valve is arranged in the peripheral wall of the housing.
  • This outlet valve can also be designed as a leaf spring valve, and advantageously both the outlet valve of the oil outlet opening and the outlet valve of the air outlet opening are formed by a single component.
  • This single component in the form of a leaf spring valve is, for example, a stamped sheet metal part which has two spring tongues.
  • the oil outlet opening is also provided in an insert, wherein the insert forms part of the peripheral surface of the working space or of the suction space.
  • the insert extends from the pressure chamber into the suction chamber, wherein the insert advantageously expands over the entire height of the inner circumferential surface.
  • the insert consists according to the invention of an elastic material, in particular of plastic.
  • the insert can act as a support or holding element for the outlet valve, wherein the outlet valve is provided between the insert and the housing wall.
  • the outlet valve may also be provided in use, wherein the outlet valve is, for example, encapsulated by the material of the insert.
  • Figure 1 is an assembled view of the vacuum pump
  • Figure 2 is a perspective view of the housing without
  • Rotor and vanes showing the two outlet openings in the peripheral wall.
  • 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 has a rotor housing 24, with which it bears against an inner peripheral surface 22 of a working space 30.
  • the rotor 18 passes through the housing 12, in particular a bottom 26 of the interior 18 via a drive opening 28 and protrudes on the rear side out of the housing 12, so that it can be rotated (by means of a drive, not shown).
  • 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.
  • the interior 16 is divided by the wing 20 into a suction chamber 40 and a pressure chamber 42.
  • an insert 38 is positioned at the transition from the suction chamber 40 to the pressure chamber 42.
  • this transition is designated by reference numeral 44, whereby at this transition 44, the peripheral wall 46 of the circular-cylindrical rotor housing 24 rests against the inner circumferential surface 22. It is clear that in this area of transition 44 in the Inner circumferential surface 22 both an air outlet opening 48 and an oil outlet 50 are located.
  • Air outlet 48 extends over a portion of the height of the inner peripheral surface 22, but it may also extend over the entire height of the inner peripheral surface 22 or at least over a substantial part of this height.
  • the air outlet opening 48 extends in the circumferential direction away from the transition 44 and ends in an oblique front edge 52. This avoids that the air outlet opening 48 opens abruptly, or the pressure chamber 42 is too fast connected to the air outlet opening 48, whereby pressure surges can occur , The gradual opening is assisted by the fact that the channel of the air outlet opening 48 gradually increases in its radial depth in the direction of rotation of the wing 20 (arrow 54 according to FIG. 1).
  • the air outlet opening 48 opens into the insert 38, which is shown in Figure 2 above an insert 38 receiving opening 56.
  • the channel of the air outlet opening 48 is deflected downward, so that the expelled gas of the housing 12 in the direction of the axis of the opening 56 leaves downward.
  • valve body 58 Between the insert 38 and the air outlet opening 48 is still a valve body 58, in which an outlet valve 60 is provided.
  • the valve body 58 has a further outlet valve 62 which is assigned to the oil outlet opening 50 and closes it. Both outlet valves 60 and 62 are formed as leaf spring valves and open both in the direction of the insert 38 and thereby prevent suction through the openings 48 and 50 in the direction of the interior 16.
  • the insert 38 has a shape and thickness of Valve body 58 corresponding recess 64, in which the Valve body 58 is inserted before the insert 38 is inserted into the opening 56.

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, a wing (20) which is displacably mounted in the rotor and which is orthogonal to the rotational axis, whereby the points of the wings are placed on the peripheral surface (22) which defines a work chamber (30) and which subdivides the work chamber into a suction chamber (40) and a pressure chamber (42), and the suction chamber is provided with an air inlet and the pressure chamber is provided with an air outlet (48). The air outlet is arranged in the peripheral surface surrounding the pressure chamber (42).

Description

Titel: EinflügelvakuumpumpeTitle: Single-wing vacuum pump
Beschreibungdescription
Die Erfindung betrifft eine Einflügelvakuumpumpe mit einem topfförmigen Gehäuse, einem exzentrisch im Gehäuse drehbar gelagerten Rotor, einem im Rotor orthogonal zur Drehachse verschieblich gelagerten Flügel, der mit seinen Flügelspitzen an einer einen Arbeitsraum begrenzenden Umfangsflache anliegt und dabei den Arbeitsraum in einen Saugraum und einen Druckraum unterteilt, und der Saugraum mit einer Lufteinlassöffnung und der Druckraum mit einer Luftauslassöffnung versehen sind.The invention relates to a single-wing vacuum pump with a cup-shaped housing, a rotor rotatably mounted eccentrically in the housing, a rotatably mounted in the rotor orthogonal to the axis of rotation, which rests with its wing tips on a working space defining peripheral surface and thereby dividing the working space into a suction chamber and a pressure chamber , And the suction chamber with an air inlet opening and the pressure chamber are provided with an air outlet opening.
Vakuumpumpen mit einem derartigen Aufbau sind bekannt. Sie weisen in der Regel ein Gehäuse auf, in welchem ein Rotor drehbar gelagert ist, wobei sich der Rotor in einem Arbeitsraum befindet. Derartige Vakuumpumpen werden u.a. auch in Fahrzeugen eingesetzt, wo zum Beispiel der Motor des Kraftfahrzeugs den Rotor in Drehung versetzt. Diese Vakuumpumpen werden mit Öl geschmiert, welches auch dazu dient, die Dichtspalt zwischen Flügel und Arbeitsraum abzudichten. Es wird angestrebt, dass möglichst wenig Öl aus der Luftauslassöffnung des Druckraumes aus dem Arbeitsraum herausgeführt wird.Vacuum pumps of such a construction are known. They usually have a housing in which a rotor is rotatably mounted, wherein the rotor is located in a working space. Such vacuum pumps are u.a. also used in vehicles, where, for example, the motor of the motor vehicle rotates the rotor. These vacuum pumps are lubricated with oil, which also serves to seal the sealing gap between the wing and working space. It is desirable that as little as possible oil is led out of the air outlet opening of the pressure chamber from the working space.
Der Erfindung liegt die Aufgabe zugrunde, eine Einflügelvakuumpumpe bereit zu stellen, bei welcher die den Druckraum verlassende Luft mit weniger Öl belastet ist.The invention has for its object to provide a single-wing vacuum pump, in which the air leaving the pressure chamber is loaded with less oil.
Diese Aufgabe wird mit einer Einflügelvakuumpumpe der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass die Luftauslassöffnung in der den Druckraum umgebenden Umfangsflache angeordnet ist.This object is achieved with a single-wing vacuum pump of the type mentioned in the present invention that the air outlet opening is arranged in the circumferential surface surrounding the pressure chamber.
Bei der erfindungsgemäßen Einflügelvakuumpumpe befindet sich die Luftauslassöffnung in der den Druckraum umgebenden Umfangsflache und nicht, wie' beim Stand der Technik, im Boden des Druckraumes, der vom Rotor durchgriffen ist. Durch die Anordnung der Auslassöffnung in der Umfangswand wird der wesentliche Vorteil geschaffen, dass die Größe des Öffnungsquerschnitts größer gestaltet werden kann als wenn die Auslassöffnung im Boden vorgesehen ist. Hierdurch wird der Druckraum schneller entleert und zum Ausschieben der angesaugten Luft aus dem Druckraum wird weniger Energie benötigt. Außerdem kann durch Variation der Form des Druckraumes ein allmähliches Öffnen bewirkt werden. So kann zum Beispiel die Öffnungskante schräg verlaufen, sodass die Auslassöffnung zunächst mit einem kleinen Querschnitt zur Verfügung steht, der sich allmählich vergrößert. Hierdurch werden Druckstöße vermieden.In the single-wing vacuum pump according to the invention, the air outlet opening is in the peripheral surface surrounding the pressure chamber and not, as in the prior art, in the bottom of the pressure chamber, which is penetrated by the rotor. The arrangement of the outlet opening in the peripheral wall of the essential advantage is provided that the size of the opening cross-section can be made larger than when the outlet opening is provided in the bottom. As a result, the pressure chamber is emptied faster and expelling the sucked air from the pressure chamber less energy is needed. In addition, by varying the shape of the pressure space, a gradual opening can be effected. For example, the opening edge may be skewed so that the outlet opening is initially available with a small cross-section that gradually increases. As a result, pressure surges are avoided.
Bei einer Weiterbildung ist vorgesehen, dass sich unmittelbar an die Luftauslassöffnung ein Auslassventil anschließt. Dies hat den wesentlichen Vorteil, dass der Totraum aus welchem die Luft nicht ausgeschoben werden kann, d.h. der Raum zwischen der Innenumfangsflache des Druckraumes und dem Auslassventil selbst, auf ein Minimum begrenzt ist.In a further development, it is provided that an exhaust valve connects directly to the air outlet opening. This has the significant advantage that the dead space from which the air can not be expelled, i. the space between the inner circumferential surface of the pressure chamber and the exhaust valve itself is kept to a minimum.
Mit Vorzug ist das Auslassventil in der Umfangswand des Gehäuses angeordnet. Diese Anordnung ist sehr platzsparend und es wird vermieden, dass das Gehäuse außenseitig mit Anbauten versehen ist.With preference, the outlet valve is arranged in the peripheral wall of the housing. This arrangement is very space-saving and it is avoided that the housing is externally provided with attachments.
Mit Vorzug ist das Auslassventil ein Blattfederventil. Derartige Ventile sind reaktionsschnell, benötigen einen sehr kleinen Bauraum und sind vor allem auch preiswert. Ist die Rückseite des Auslassventils eben ausgebildet, dann legt sich das Blattfederventil optimal an den Rand der Auslassöffnung an, ohne dass es hierfür spezieller Anpresshilfen bedarf. Das Auslassventil ist somit im Saugvorgang geschlossen und öffnet zum Ausstoßen der Luft.With preference, the exhaust valve is a leaf spring valve. Such valves are responsive, require a very small amount of space and are above all inexpensive. If the back of the exhaust valve is flat, then it settles the leaf spring valve optimally to the edge of the outlet, without the need for special Anpresshilfen. The exhaust valve is thus closed in the suction and opens to expel the air.
Bei einem bevorzugten Ausführungsbeispiel ist die Luftauslassöffnung mit einem Einsatz versehen, wobei der Einsatz einen Teil der Umfangsflache des Druckraumes bildet oder in die Gehäusewandung integriert ist. Durch den Einsatz kann die Größe und ggf. die Form der Luftauslassöffnung bestimmt werden. Bei einem in die Gehäusewand integrierten Einsatz wird die Möglichkeit geschaffen, dass die Auslassöffnung in einen Kanal mündet, der das Gehäuse zum Beispiel in axialer Richtung verlässt. Die radial oder tangential austretende Luft wird also im Einsatz in axialer Richtung umgelenkt. Dieser Umlenkkanal befindet sich im Einlass, der zum Beispiel ein Spritzgussteil ist, sodass das Gehäuse keiner aufwendigen Bearbeitung bedarf.In a preferred embodiment, the air outlet opening is provided with an insert, wherein the insert forms part of the peripheral surface of the pressure chamber or is integrated in the housing wall. Through the use of the size and possibly the shape of the air outlet opening can be determined. With an insert integrated into the housing wall, the possibility is created that the outlet opening opens into a channel which leaves the housing, for example, in the axial direction. The radially or tangentially exiting air is thus deflected in use in the axial direction. This deflection channel is located in the inlet, which is for example an injection molded part, so that the housing requires no elaborate processing.
Eine erfindungsgemäße Variante sieht vor, dass in der den Saugraum umgebenden Umfangsfläche eine Ölauslassöffnung vorgesehen ist. Dreht der Rotor, aus welchen Gründen auch immer, rückwärts, dann kann sich im Saugraum ansammelndes Schmieröl aus dieser Ölauslassöffnung abgeführt werden, da die Saugöffnung über ein entsprechendes Ventil verhindert, dass bereits angesaugte Luft und Schmieröl wieder ausgestoßen werden. Diese Luft und das Schmieröl können nun durch die Ölauslassöffnung entweichen.A variant according to the invention provides that an oil outlet opening is provided in the peripheral surface surrounding the suction space. Rotates the rotor, for whatever reason, backwards, then in the suction chamber accumulating lubricating oil can be removed from this Ölauslassöffnung because the suction prevents a corresponding valve that already sucked air and lubricating oil are ejected again. This air and the lubricating oil can now escape through the oil outlet.
Erfindungsgemäß schließt sich das Auslassventil unmittelbar an die Ölauslassöffnung an. Dieses Ventil verhindert, dass über die Ölauslassöffnung Luft und/oder Öl angesaugt wird, wenn die Pumpe sich im Normalbetrieb befindet.According to the invention, the outlet valve directly adjoins the oil outlet opening. This valve prevents air and / or oil from being drawn in through the oil outlet when the pump is in normal operation.
Erfindungsgemäß ist das Auslassventil in der Umfangswand des Gehäuses angeordnet. Somit ergeben sich die bereits oben zum Auslassventil der Luftauslassöffnung erwähnten Vorteile. Auch dieses Auslassventil kann als Blattfederventil ausgebildet sein und vorteilhaft sind sowohl das Auslassventil der Ölauslassöffnung als auch das Auslassventil der Luftauslassöffnung von einem einzigen Bauteil gebildet. Dieses einzige Bauteil in Form eines Blattfederventils ist zum Beispiel ein gestanztes Blechteil, welches zwei Federzungen aufweist.According to the invention, the outlet valve is arranged in the peripheral wall of the housing. Thus, the result already above for Outlet valve of the air outlet opening mentioned advantages. This outlet valve can also be designed as a leaf spring valve, and advantageously both the outlet valve of the oil outlet opening and the outlet valve of the air outlet opening are formed by a single component. This single component in the form of a leaf spring valve is, for example, a stamped sheet metal part which has two spring tongues.
Erfindungsgemäß ist auch die Ölauslassöffnung in einem Einsatz vorgesehen, wobei der Einsatz einen Teil der Umfangsflache des Arbeitsraums bzw. des Saugraumes bildet. Hierdurch ergibt sich, dass sich der Einsatz vom Druckraum in den Saugraum erstreckt, wobei der Einsatz vorteilhaft sich über die gesamte Höhe der Innenumfangsflache ausdehnt. Mittels des Einsatzes kann zudem noch eine optimale Abdichtung der Innenumfangswand gegenüber dem Rotor erfolgen. Der Einsatz besteht dabei erfindungsgemäß aus einem elastischen Material, insbesondere aus Kunststoff.According to the invention, the oil outlet opening is also provided in an insert, wherein the insert forms part of the peripheral surface of the working space or of the suction space. This results in that the insert extends from the pressure chamber into the suction chamber, wherein the insert advantageously expands over the entire height of the inner circumferential surface. By means of the insert can also be made an optimal sealing of the inner peripheral wall relative to the rotor. The insert consists according to the invention of an elastic material, in particular of plastic.
Der Einsatz kann dabei als Träger oder Halteelement für das Auslassventil fungieren, wobei das Auslassventil zwischen dem Einsatz und der Gehäusewandung vorgesehen ist. Alternativ kann das Auslassventil auch im Einsatz vorgesehen sein, wobei das Auslassventil zum Beispiel vom Material des Einsatzes umspritzt ist.The insert can act as a support or holding element for the outlet valve, wherein the outlet valve is provided between the insert and the housing wall. Alternatively, the outlet valve may also be provided in use, wherein the outlet valve is, for example, encapsulated by the material of 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 Zusammenbaudarstellung der Vakuumpumpe; undFigure 1 is an assembled view of the vacuum pump; and
Figur 2 eine perspektivische Ansicht des Gehäuses ohneFigure 2 is a perspective view of the housing without
Rotor und Flügel, die beiden Auslassöffnungen in der Umfangswand zeigend.Rotor and vanes, showing the two outlet openings in the peripheral wall.
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 weist ein Rotorgehäuse 24 auf, mit dem er an einer Innenumfangsflache 22 eines Arbeitsraumes 30 anliegt. Der Rotor 18 durchgreift das Gehäuse 12, insbesondere einen Boden 26 des Innenraums 18 über eine Antriebsöffnung 28 und ragt auf der Rückseite aus dem Gehäuse 12 heraus, so dass er (mittels eines nicht dargestellten Antriebs) in Drehung versetzt werden kann. Die Antriebsöffnung 28 ist mit geeigneten Dichtmitteln versehen, sodass weder Schmiermittel austreten noch Luft und/oder Schmutz in den Innenraum 16 eintreten kann. Der Innenraum 16 wird vom Flügel 20 in einen Saugraum 40 und einen Druckraum 42 unterteilt.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 has a rotor housing 24, with which it bears against an inner peripheral surface 22 of a working space 30. The rotor 18 passes through the housing 12, in particular a bottom 26 of the interior 18 via a drive opening 28 and protrudes on the rear side out of the housing 12, so that it can be rotated (by means of a drive, not shown). 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. The interior 16 is divided by the wing 20 into a suction chamber 40 and a pressure chamber 42.
In der Figur 1 ist außerdem erkennbar, dass sich in der Gehäusewand 36 ein Einsatz 38 befindet, der am Übergang vom Saugraum 40 zum Druckraum 42 positioniert ist.In the figure 1 is also seen that in the housing wall 36, an insert 38 is positioned at the transition from the suction chamber 40 to the pressure chamber 42.
In der Figur 2 ist dieser Übergang mit dem Bezugszeichen 44 bezeichnet, wobei an diesem Übergang 44 auch die Umfangswand 46 des kreiszylinderförmigen Rotorgehäuses 24 an der Innenumfangsflache 22 anliegt. Es ist deutlich erkennbar, dass sich in diesem Bereich des Übergangs 44 in der Innenumfangsfläche 22 sowohl eine Luftauslassöffnung 48 als auch eine Ölauslassöffnung 50 befinden. DieIn FIG. 2, this transition is designated by reference numeral 44, whereby at this transition 44, the peripheral wall 46 of the circular-cylindrical rotor housing 24 rests against the inner circumferential surface 22. It is clear that in this area of transition 44 in the Inner circumferential surface 22 both an air outlet opening 48 and an oil outlet 50 are located. The
Luftauslassöffnung 48 erstreckt sich über einen Teil der Höhe der Innenumfangsflache 22, sie kann sich aber auch über die gesamte Höhe der Innenumfangsflache 22 oder wenigstens über einen wesentlichen, Teil dieser Höhe erstrecken.Air outlet 48 extends over a portion of the height of the inner peripheral surface 22, but it may also extend over the entire height of the inner peripheral surface 22 or at least over a substantial part of this height.
Außerdem erstreckt sich die Luftauslassöffnung 48 in Umfangsrichtung weg vom Übergang 44 und endet in einer schrägen Stirnkante 52. Hierdurch wird vermieden, dass sich die Luftauslassöffnung 48 schlagartig öffnet, bzw. der Druckraum 42 zu schnell mit der Luftauslassöffnung 48 verbunden wird, wodurch Druckstöße entstehen können. Die allmähliche Öffnung wird dadurch unterstützt, dass sich der Kanal der Luftauslassöffnung 48 in Drehrichtung des Flügels 20 (Pfeil 54 gemäß Figur 1) allmählich in seiner radialen Tiefe zunimmt.In addition, the air outlet opening 48 extends in the circumferential direction away from the transition 44 and ends in an oblique front edge 52. This avoids that the air outlet opening 48 opens abruptly, or the pressure chamber 42 is too fast connected to the air outlet opening 48, whereby pressure surges can occur , The gradual opening is assisted by the fact that the channel of the air outlet opening 48 gradually increases in its radial depth in the direction of rotation of the wing 20 (arrow 54 according to FIG. 1).
Die Luftauslassöffnung 48 mündet in den Einsatz 38, der in Figur 2 oberhalb einer den Einsatz 38 aufnehmenden Öffnung 56 dargestellt ist. Im Einsatz 38 wird der Kanal der Luftauslassöffnung 48 nach unten umgelenkt, sodass das ausgestoßene Gas des Gehäuse 12 in Richtung der Achse der Öffnung 56 nach unten verlässt.The air outlet opening 48 opens into the insert 38, which is shown in Figure 2 above an insert 38 receiving opening 56. In the insert 38, the channel of the air outlet opening 48 is deflected downward, so that the expelled gas of the housing 12 in the direction of the axis of the opening 56 leaves downward.
Zwischen dem Einsatz 38 und der Luftauslassöffnung 48 befindet sich noch ein Ventilkörper 58, in welchem ein Auslassventil 60 vorgesehen ist. Der Ventilkörper 58 besitzt ein weiteres Auslassventil 62, welches der Ölauslassöffnung 50 zugeordnet ist und diese verschließt. Beide Auslassventile 60 und 62 sind als Blattfederventile ausgebildet und öffnen beide in Richtung des Einsatzes 38 und verhindern dadurch ein Ansaugen durch die Öffnungen 48 und 50 in Richtung des Innenraums 16. Zur exakten Positionierung des Ventilkörpers 58 besitzt der Einsatz 38 eine der Form und Dicke des Ventilkörpers 58 entsprechende Aussparung 64, in welche der Ventilkörper 58 eingesetzt wird, bevor der Einsatz 38 in die Öffnung 56 eingeschoben wird.Between the insert 38 and the air outlet opening 48 is still a valve body 58, in which an outlet valve 60 is provided. The valve body 58 has a further outlet valve 62 which is assigned to the oil outlet opening 50 and closes it. Both outlet valves 60 and 62 are formed as leaf spring valves and open both in the direction of the insert 38 and thereby prevent suction through the openings 48 and 50 in the direction of the interior 16. For exact positioning of the valve body 58, the insert 38 has a shape and thickness of Valve body 58 corresponding recess 64, in which the Valve body 58 is inserted before the insert 38 is inserted into the opening 56.
Mit der in der Innenumfangsflache 22 vorgesehenen Luftauslassöffnung 48, deren Größe hinsichtlich ihrer Höhe und Länge an das auszustoßende Volumen anpassbar ist, wird auf einfache Weise das zum Ausstoßen erforderliche Drehmoment auf ein Minimum reduziert. Die Leistungsaufnahme der Vakuumpumpe 10 wird dadurch verringert. With the provided in the inner circumferential surface 22 air outlet opening 48, whose size is adaptable in terms of their height and length to the ejected volume, the torque required for the ejection is reduced to a minimum in a simple manner. The power consumption of the vacuum pump 10 is thereby reduced.

Claims

Patentansprüche claims
1. Einflüge1Vakuumpumpe (10) mit einem topfförmigen Gehäuse1. Einflug1Vakuumpumpe (10) with a cup-shaped housing
(12), einem exzentrisch im Gehäuse (12) drehbar gelagerten Rotor (18), einem im Rotor (18) orthogonal zur Drehachse (21) verschieblich gelagerten Flügel (20) , der mit seinen Flügelspitzen an einer einen Arbeitsraum(12), a rotatably mounted in the housing (12) rotatably mounted rotor (18) in the rotor (18) orthogonal to the axis of rotation (21) slidably mounted wings (20), with its wing tips on a working space
(30) begrenzenden Innenumfangsflache (22) anliegt und dabei den Arbeitsraum (30) in einen Saugraum (40) und einen Druckraum (42) unterteilt, und der Saugraum (40) mit einer Lufteinlassöffnung und der Druckraum (42) mit einer Luftauslassöffnung (48) versehen sind, dadurch gekennzeichnet, dass die Luftauslassöffnung (48) in der den Druckraum (42) umgebenden Innenumfangsfl,äche (22) angeordnet ist.(30) abuts the limiting inner circumferential surface (22), thereby dividing the working space (30) into a suction space (40) and a pressure space (42), and the suction space (40) having an air inlet opening and the pressure space (42) having an air outlet opening (48 ), characterized in that the air outlet opening (48) in the pressure space (42) surrounding Innenumfangsfl, surface (22) is arranged.
2. Einflügelvakuumpumpe nach Anspruch 1, dadurch gekennzeichnet, dass sich unmittelbar -an die Luftauslassöffnung (48) ein Auslassventil (60) anschließt.2. wing vacuum pump according to claim 1, characterized in that directly -An the air outlet opening (48) is followed by an outlet valve (60).
3. Einflügelvakuumpumpe nach Anspruch 2, dadurch gekennzeichnet, dass das Auslassventil (60) in der Umfangswand (36) des Gehäuses (12) angeordnet ist.3. single-vane vacuum pump according to claim 2, characterized in that the outlet valve (60) in the peripheral wall (36) of the housing (12) is arranged.
4. Einflügelvakuumpumpe nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass das Auslassventil (60) ein Blattfederventil ist.4. single-vane vacuum pump according to claim 2 or 3, characterized in that the outlet valve (60) is a leaf spring valve.
5. Einflügelvakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Luftauslassöffnung (48) in einem Einsatz (38) vorgesehen ist und der Einsatz (38) einen Teil der5. single-vane vacuum pump according to one of the preceding claims, characterized in that the air outlet opening (48) in an insert (38) is provided and the insert (38) is a part of
Innenumfangsflache (22) bildet.Inner circumferential surface (22) forms.
6. Einflügelvakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in der den Saugraum (40) umgebenden Innenumfangsflache (22) eine Ölauslassöffnung (50) vorgesehen ist.6. single-wing vacuum pump according to one of the preceding claims, characterized in that in the Suction chamber (40) surrounding inner peripheral surface (22) an oil outlet opening (50) is provided.
7. Einflügelvakuumpumpe nach Anspruch 6, dadurch gekennzeichnet, dass sich unmittelbar an die Ölauslassöffnung (50) ein Auslassventil (62) anschließt.7. single-vane vacuum pump according to claim 6, characterized in that directly adjoins the Ölauslassöffnung (50) an outlet valve (62).
8. Einflügelvakuumpumpe nach Anspruch 7, dadurch gekennzeichnet, dass das Auslassventil (62) in der Umfangswand (36) des Gehäuses (12) angeordnet ist.8. single-vane vacuum pump according to claim 7, characterized in that the outlet valve (62) in the peripheral wall (36) of the housing (12) is arranged.
9. Einflügelvakuumpumpe nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass das Auslassventil (62) ein Blattfederventil ist.9. single-vane vacuum pump according to claim 6 or 7, characterized in that the outlet valve (62) is a leaf spring valve.
10. Einflügelvakuumpumpe nach einem der Ansprüche 3 bis 9, dadurch gekennzeichnet, dass die Auslassventile (60, 62) von einem einzigen Bauteil gebildet werden.10. single-vane vacuum pump according to one of claims 3 to 9, characterized in that the outlet valves (60, 62) are formed by a single component.
11. Einflügelvakuumpumpe nach- einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, dass die Ölauslassöffnung (50) in einem Einsatz (38) vorgesehen ist und der Einsatz (38) einen Teil der Innenumfangsflache (22) bildet.11. Single-vane vacuum pump according to one of claims 6 to 10, characterized in that the oil outlet opening (50) in an insert (38) is provided and the insert (38) forms a part of the inner peripheral surface (22).
12. Einflügelvakuumpumpe nach Anspruch 5 und 11, dadurch gekennzeichnet, dass die beiden Einsätze einteilig ausgebildet sind.12. single-wing vacuum pump according to claim 5 and 11, characterized in that the two inserts are integrally formed.
13. Einflügelvakuumpumpe nach einem der Ansprüche 5, 11 oder 12, dadurch gekennzeichnet, dass der Einsatz (38) aus Kunststoff besteht.13. single-wing vacuum pump according to any one of claims 5, 11 or 12, characterized in that the insert (38) consists of plastic.
14. Einflügelvakuumpumpe nach einem der Ansprüche 5 oder 11 bis 13, dadurch gekennzeichnet, dass sich zwischen dem Einsatz (38) und der Gehäusewand (36) das Auslassventil14. single-vane vacuum pump according to one of claims 5 or 11 to 13, characterized in that between the insert (38) and the housing wall (36), the outlet valve
(60, 62) befindet. (60, 62).
15. EinflügelVakuumpumpe nach einem der Ansprüche 5 oder 11 bis 13, dadurch gekennzeichnet, dass das Auslassventil (60, 62) in den Einsatz (38) integriert ist. 15. single-vane vacuum pump according to one of claims 5 or 11 to 13, characterized in that the outlet valve (60, 62) in the insert (38) is integrated.
EP05739759A 2004-07-09 2005-04-20 Single-winged vacuum pump Expired - Fee Related EP1766239B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004034926A DE102004034926B3 (en) 2004-07-09 2004-07-09 A single-blade
PCT/EP2005/004212 WO2006005383A1 (en) 2004-07-09 2005-04-20 Single-winged vacuum pump

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EP1766239A1 true EP1766239A1 (en) 2007-03-28
EP1766239B1 EP1766239B1 (en) 2008-12-03

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EP (1) EP1766239B1 (en)
KR (1) KR20070034090A (en)
CN (1) CN101002022B (en)
CA (1) CA2575780C (en)
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WO (1) WO2006005383A1 (en)

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DE502005006154D1 (en) 2009-01-15
EP1766239B1 (en) 2008-12-03
DE102004034926B3 (en) 2005-12-29
CA2575780A1 (en) 2006-01-19
WO2006005383A1 (en) 2006-01-19
CA2575780C (en) 2015-07-07
CN101002022A (en) 2007-07-18
CN101002022B (en) 2012-06-06
KR20070034090A (en) 2007-03-27

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