WO2010031504A2 - Vacuum pump - Google Patents

Vacuum pump Download PDF

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Publication number
WO2010031504A2
WO2010031504A2 PCT/EP2009/006463 EP2009006463W WO2010031504A2 WO 2010031504 A2 WO2010031504 A2 WO 2010031504A2 EP 2009006463 W EP2009006463 W EP 2009006463W WO 2010031504 A2 WO2010031504 A2 WO 2010031504A2
Authority
WO
WIPO (PCT)
Prior art keywords
vacuum pump
recess
outlet opening
rotor
wing
Prior art date
Application number
PCT/EP2009/006463
Other languages
German (de)
French (fr)
Other versions
WO2010031504A3 (en
Inventor
Markus Kinzel
Original Assignee
Ixetic Hückeswagen 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 Ixetic Hückeswagen Gmbh filed Critical Ixetic Hückeswagen Gmbh
Priority to DE112009002099T priority Critical patent/DE112009002099A5/en
Publication of WO2010031504A2 publication Critical patent/WO2010031504A2/en
Publication of WO2010031504A3 publication Critical patent/WO2010031504A3/en

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
    • 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
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0021—Systems for the equilibration of forces acting on the pump
    • 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
    • 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
    • F04C2240/20—Rotors

Definitions

  • the invention relates to a vacuum pump, in particular a vane pump, having a rotor which is rotatable about an axis of rotation and is guided by the at least one wing movable back and forth within a circulation contour, at which the rotor conforms in a nip, in the vicinity thereof Outlet opening is provided in an axial housing boundary surface.
  • the object of the invention is a vacuum pump, in particular a vane pump, with a rotor which is rotatable about an axis of rotation and is guided by the at least one wing movable back and forth within a circulation contour, on which the rotor conforms in a nip, in the proximity of which an outlet opening is provided in an axial housing boundary surface to provide, which has a long life and low power dissipation.
  • the object is in a vacuum pump, in particular a vane pump, with a rotor which is rotatable about an axis of rotation and is guided by the at least one wing movable back and forth within a circulation contour at which the rotor nestles in a nip in the vicinity an outlet opening is provided in an axial housing limiting surface, achieved by providing at least one recess, which at least temporarily covers the outlet opening, at a part of the vacuum pump which is moved by rotation of the rotor and which opens towards the outlet opening.
  • the outlet opening is preferably an outlet opening on the outlet side, on which the working medium is ejected in normal operation.
  • the outlet opening can also be an additional outlet opening on the suction side, onto which the working medium is sucked in, for example, from an internal combustion engine during normal operation.
  • a plurality of outlet ports for example, an overpressure-side outlet port and a vacuum-side outlet port, may be configured according to an embodiment of the present invention. Through the outlet opening a pressurized in the vacuum pump working fluid is ejected. For the dimensioning of the outlet opening extreme conditions are determining, for example, high pressure at a cold start or pressure peaks at high speeds.
  • a preferred embodiment of the vacuum pump is characterized in that the recess is arranged, at least partially, in register with the outlet opening. The overlap is preferably greatest when the wing approaches the crimp gap.
  • the recess is preferably attached to a part of the vacuum pump, which rotates about the rotor rotational axis during operation of the vacuum pump and thereby moves past the outlet opening.
  • a further preferred embodiment of the vacuum pump is characterized in that the recess is provided on a part of the rotor.
  • the outlet opening is concealed, at least in part, by the rotor, the wing and possibly caps provided at the wing tips.
  • a further preferred embodiment of the vacuum pump is characterized in that the recess is provided on a cheek of a wing receiving slot of the rotor.
  • a further preferred embodiment of the vacuum pump is characterized in that the recess is provided radially outwardly on the cheek of the wing receiving slot of the rotor.
  • the recess is preferably, viewed in the axial direction, provided at one end of the cheek as a chamfer of a corner of the wing receiving slot.
  • Axial means in the context of the present invention in the direction or parallel to the axis of rotation of the rotor.
  • a further preferred embodiment of the vacuum pump is characterized in that the recess is designed as a chamfer which extends in the axial direction.
  • the recess in particular the chamfer, completely covers the outlet opening when the wing receiving slot moves toward the nip.
  • the recess is provided on a cap which is attached to one end of the wing, and / or on the wing itself.
  • a further preferred embodiment of the vacuum pump is characterized in that a further recess is provided on the further part or on the part of the vacuum pump which conceals a further outlet opening, which opens to the further outlet opening.
  • the further outlet opening is preferably effective in a reverse rotation of the rotor against the normal operating direction of rotation.
  • the further recess is designed in accordance with one of the embodiments described above, but arranged on the opposite side of the copegeldichtWallets with the circulation contour.
  • FIG. 1 shows a vacuum pump according to a first embodiment with an open pump housing in plan view
  • Figure 2 is a perspective view of the vacuum pump of Figure 1 with a
  • Figure 3 is an enlarged view of the broken portion of Figure 2;
  • Figure 4 is a similar view as in Figure 2 according to another embodiment and
  • FIGS. 1 to 5 each show a vacuum pump 1; 41 shown in different views.
  • the same reference numbers are used to designate the same.
  • the vacuum pump 1; 41 includes a housing 2 with a housing pot 4, which is shown in Figures 1 to 5 without an associated housing cover, ie in the open state, so that you see the inside of the housing pot 4 arranged parts of the vacuum pump 1.
  • a circulation contour 5 is formed, which is also referred to as a stroke contour and limits a working space in the interior of the vacuum pump 1 in the radial direction.
  • a pot bottom 6 which is an axial housing boundary surface of the working space.
  • a rotor 8 is rotatably mounted, which rotates during operation of the vacuum pump 1 in an operating direction of rotation 24, which is indicated by an arrow.
  • a wing 14 is slidably guided within the circulation contour 5.
  • caps 15, 16 are attached, which bear against the circulating contour 5.
  • the rotor 8; 48 nestles with its outer contour in a so-called Schmiegespalt 18 to the circulation contour. 5
  • the suction chamber 19 is also referred to as a suction chamber.
  • the pressure chamber 20 is also referred to as a pressure chamber.
  • the suction chamber 19 communicates with an inlet port 17 of the vacuum pump 1 in connection.
  • a working medium, in particular air is sucked into the suction space 19 via the inlet connection 17 and mixed with oil in the pressure space 20 with oil to form an air-oil mixture subjected to pressure.
  • the vacuum pump which is also referred to as a single-blade pump because of its one wing 14, is used to apply a negative pressure, that is to say a vacuum, to a brake booster of a motor vehicle.
  • the pressure chamber 20 is connected via an outlet opening 21 with the interposition of a (not shown) check valve with a crankcase of an internal combustion engine of a motor vehicle in combination.
  • a (not shown) check valve with a crankcase of an internal combustion engine of a motor vehicle in combination.
  • the outlet opening 21 which is through the wing 14 with Pressure acted upon working fluid from the pressure chamber 20 of the vacuum pump 1 is ejected.
  • the outlet opening 21 extends into the vicinity of the Schmiegespalts 18th
  • Another outlet opening 22 is provided in the suction chamber 19.
  • the further outlet opening 22 is also connected to the crankcase of the internal combustion engine with the interposition of another check valve.
  • the further outlet opening 22 is effective when the rotor 8 rotates due to incorrect operation of the vehicle during transport against its normal operating direction of rotation 24. Such a malfunction of the vehicle is, for example, when the vehicle rolls backwards from a ramp with an engaged forward gear.
  • the two outlet openings 21, 22 are both recessed in the pot bottom 6 and are partially and temporarily from the rotor 8; 48, the wing 14 and the caps 15, 16 covered.
  • the wing receiving slot 9; 49 extends with its two cheeks 11, 12; 51, 52 through the rotor 8 therethrough.
  • a working medium shaft is formed on the circulating contour 5 on the cap 15 in front of the lubricating gap 18. The working medium shaft is pushed out through the outlet opening 21.
  • FIGS. 1 to 3 a part of the outlet opening 21, which was previously covered by the rotor 8, is released through the recess 25, whereby a larger outlet cross-section in the critical area between the wing 14 and the cap 15 and the Schmiegespalt 18 is released in view of the pressure to be degraded.
  • the recess 25 ensures that the remaining pressure space in front of the wing 14 is connected to the outlet opening 21.
  • the recess 25 is designed as a chamfer.
  • Another, also formed as a chamfer recess 26 is provided in the wing receiving slot 9 diagonally opposite to the cheek 12.
  • FIGS. 4 and 5 it can be seen that on the cheek 51 of the wing receiving slot 49 of the rotor 48 there can also be provided a partial recess 65, for example as a bevel of a corner, which opens towards the outlet opening 21. I have to say

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 vacuum pump, particularly a vane pump, comprising a rotor which can be rotated about a rotational axis and through which at least one vane is moveably guided back and forth within a peripheral contour, against which the rotor nestles in a bevel gap. In the vicinity of said bevel gap, an outlet opening is provided in an axial delimiting surface of the housing. The invention is characterized in that at least one recess opening toward the outlet opening is provided on a part of the vacuum pump at least temporarily covering the outlet opening at least partially.

Description

Vakuumpumpe vacuum pump
Die Erfindung betrifft eine Vakuumpumpe, insbesondere eine Flügelzellenpumpe, mit einem Rotor, der um eine Drehachse drehbar ist und durch den mindestens ein Flügel hin und her bewegbar innerhalb einer Umlaufkontur geführt ist, an welcher sich der Rotor in einem Schmiegespalt anschmiegt, in dessen Nähe eine Auslassöffnung in einer axialen Gehäusebegrenzungsfläche vorgesehen ist.The invention relates to a vacuum pump, in particular a vane pump, having a rotor which is rotatable about an axis of rotation and is guided by the at least one wing movable back and forth within a circulation contour, at which the rotor conforms in a nip, in the vicinity thereof Outlet opening is provided in an axial housing boundary surface.
Aufgabe der Erfindung ist es, eine Vakuumpumpe, insbesondere eine Flügelzellenpumpe, mit einem Rotor, der um eine Drehachse drehbar ist und durch den mindestens ein Flügel hin und her bewegbar innerhalb einer Umlaufkontur geführt ist, an welcher sich der Rotor in einem Schmiegespalt anschmiegt, in dessen Nähe eine Auslassöffnung in einer axialen Gehäusebegrenzungsfläche vorgesehen ist, zu schaffen, die eine hohe Lebensdauer und eine geringe Verlustleistung aufweist.The object of the invention is a vacuum pump, in particular a vane pump, with a rotor which is rotatable about an axis of rotation and is guided by the at least one wing movable back and forth within a circulation contour, on which the rotor conforms in a nip, in the proximity of which an outlet opening is provided in an axial housing boundary surface to provide, which has a long life and low power dissipation.
Die Aufgabe ist bei einer Vakuumpumpe, insbesondere einer Flügelzellenpumpe, mit einem Rotor, der um eine Drehachse drehbar ist und durch den mindestens ein Flügel hin und her bewegbar innerhalb einer Umlaufkontur geführt ist, an welcher sich der Rotor in einem Schmiegespalt anschmiegt, in dessen Nähe eine Auslassöffnung in einer axialen Gehäusebegrenzungsfläche vorgesehen ist, dadurch gelöst, dass an einem durch Rotation des Rotors bewegten Teil der Vakuumpumpe, das, zumindest zeitweise, die Auslassöffnung teilweise verdeckt, mindestens eine Ausnehmung vorgesehen ist, die sich zur Auslassöffnung hin öffnet. Bei der Auslassöffnung handelt es sich vorzugsweise um eine Auslassöffnung auf der Auslassseite, auf weicher im Normalbetrieb das Arbeitsmedium ausgestoßen wird. Bei der Auslassöffnung kann es sich aber auch um eine zusätzliche Auslassöffnung auf der Ansaugseite handeln, auf weicher im Normalbetrieb das Arbeitsmedium beispielsweise aus einem Brennkraftverstärker angesaugt wird. Es können auch mehrere Auslassöffnungen, zum Beispiel eine überdruckseitige Auslassöffnung und eine unterdruckseitige Auslassöffnung, gemäß einem Ausführungsbeispiel der vorliegenden Erfindung gestaltet sein. Durch die Auslassöffnung wird ein in der Vakuumpumpe mit Druck beaufschlagtes Arbeitsmedium ausgeschoben. Für die Dimensionierung der Auslassöffnung sind Extrembedingungen mitbestimmend, zum Beispiel hoher Druck bei einem Kaltstart oder Druckspitzen bei hohen Drehzahlen. Zudem kann sich aufgrund der im Betrieb wirkenden Fliehkraft vor dem Flügel an der Umlaufkontur bei Erreichen des Sohmiegespälts eine ArbeitsmediuMV.vsüc, die insbesondere durch Hinzufügen eines flüssigen Dicht- und/oder Schmiermittels, zum Beispiel Motoröl, zum eigentlichen Arbeitsmedium Luft gefördert wird, bilden. Durch die erfindungsgemäße Ausnehmung wird das Ausschieben des Arbeitsmediums durch die Auslassöffnung verbessert, insbesondere der dabei auftretende Überdruck verringert, indem der wirksame Auslassquerschnitt in einem besonders kritischen Bereich unmittelbar vor dem Flügel am Schmiegespalt gezielt vergrößert wird. Es können auch mehrere Ausnehmungen an einem Teil oder an mehreren Teilen vorgesehen sein.The object is in a vacuum pump, in particular a vane pump, with a rotor which is rotatable about an axis of rotation and is guided by the at least one wing movable back and forth within a circulation contour at which the rotor nestles in a nip in the vicinity an outlet opening is provided in an axial housing limiting surface, achieved by providing at least one recess, which at least temporarily covers the outlet opening, at a part of the vacuum pump which is moved by rotation of the rotor and which opens towards the outlet opening. The outlet opening is preferably an outlet opening on the outlet side, on which the working medium is ejected in normal operation. However, the outlet opening can also be an additional outlet opening on the suction side, onto which the working medium is sucked in, for example, from an internal combustion engine during normal operation. Also, a plurality of outlet ports, for example, an overpressure-side outlet port and a vacuum-side outlet port, may be configured according to an embodiment of the present invention. Through the outlet opening a pressurized in the vacuum pump working fluid is ejected. For the dimensioning of the outlet opening extreme conditions are determining, for example, high pressure at a cold start or pressure peaks at high speeds. moreover may be due to the centrifugal force acting in operation before the wing on the circulation contour upon reaching the Sohmiegespälts ArbeitsMedienVVS.üc, which is promoted in particular by adding a liquid sealant and / or lubricant, for example engine oil to the actual working medium air. By means of the recess according to the invention, the expulsion of the working medium through the outlet opening is improved, in particular the occurring overpressure is reduced by the effective outlet cross-section being specifically enlarged in a particularly critical region immediately in front of the wing at the nip. It can also be provided several recesses on one part or on several parts.
Ein bevorzugtes Ausführungsbeispiel der Vakuumpumpe ist dadurch gekennzeichnet, dass die Ausnehmung, zumindest teilweise, in Überdeckung zur der Auslassöffnung angeordnet ist. Die Überdeckung ist vorzugsweise dann am größten, wenn sich der Flügel dem Schmiegespalt nähert. Die Ausnehmung ist vorzugsweise an einem Teil der Vakuumpumpe angebracht, das im Betrieb der Vakuumpumpe um die Rotordrehachse rotiert und sich dabei an der Auslassöffnung vorbei bewegt.A preferred embodiment of the vacuum pump is characterized in that the recess is arranged, at least partially, in register with the outlet opening. The overlap is preferably greatest when the wing approaches the crimp gap. The recess is preferably attached to a part of the vacuum pump, which rotates about the rotor rotational axis during operation of the vacuum pump and thereby moves past the outlet opening.
Ein weiteres bevorzugtes Ausführungsbeispiel der Vakuumpumpe ist dadurch gekennzeichnet, dass die Ausnehmung an einem Teil des Rotors vorgesehen ist. Die Auslassöffnung wird im Betrieb der Vakuumpumpe, zumindest teilweise, von dem Rotor, dem Flügel und gegebenenfalls von an den Flügelenden vorgesehenen Kappen verdeckt.A further preferred embodiment of the vacuum pump is characterized in that the recess is provided on a part of the rotor. During operation of the vacuum pump, the outlet opening is concealed, at least in part, by the rotor, the wing and possibly caps provided at the wing tips.
Ein weiteres bevorzugtes Ausführungsbeispiel der Vakuumpumpe ist dadurch gekennzeichnet, dass die Ausnehmung an einer Wange eines Flügelaufnahmeschlitzes des Rotors vorgesehen ist. Dadurch kann der Auslassquerschnitt in dem kritischen Bereich auf besonders einfache Art und Weise wirksam vergrößert werden.A further preferred embodiment of the vacuum pump is characterized in that the recess is provided on a cheek of a wing receiving slot of the rotor. As a result, the outlet cross section can be effectively increased in the critical area in a particularly simple manner.
Ein weiteres bevorzugtes Ausführungsbeispiel der Vakuumpumpe ist dadurch gekennzeichnet, dass die Ausnehmung radial außen an der Wange des Flügelaufnahmeschlitzes des Rotors vorgesehen ist. Die Ausnehmung ist vorzugsweise, in axialer Richtung betrachtet, an einem Ende der Wange als Abschrägung einer Ecke des Flügelaufnahmeschlitzes vorgesehen. Axial bedeutet im Rahmen der vorliegenden Erfindung in Richtung oder parallel zu der Drehachse des Rotors. Ein weiteres bevorzugtes Ausführungsbeispiel der Vakuumpumpe ist dadurch gekennzeichnet, dass die Ausnehmung als Fase ausgeführt ist, die sicn in axialer Richtung erstreckt. Vorzugsweise überdeckt die Ausnehmung, insbesondere die Fase, die Auslassöffnung vollständig, wenn sich der Flügelaufnahmeschlitz auf den Schmiegespalt zu bewegt.A further preferred embodiment of the vacuum pump is characterized in that the recess is provided radially outwardly on the cheek of the wing receiving slot of the rotor. The recess is preferably, viewed in the axial direction, provided at one end of the cheek as a chamfer of a corner of the wing receiving slot. Axial means in the context of the present invention in the direction or parallel to the axis of rotation of the rotor. A further preferred embodiment of the vacuum pump is characterized in that the recess is designed as a chamfer which extends in the axial direction. Preferably, the recess, in particular the chamfer, completely covers the outlet opening when the wing receiving slot moves toward the nip.
Weitere bevorzugte Ausführungsbeispiele der Vakuumpumpe sind dadurch gekennzeichnet, dass die Ausnehmung an einer Kappe, die an einem Ende des Flügels angebracht ist, und/oder an dem Flügel selbst vorgesehen ist.Further preferred embodiments of the vacuum pump are characterized in that the recess is provided on a cap which is attached to one end of the wing, and / or on the wing itself.
Ein weiteres bevorzugtes Ausführungsbeispiel der Vakuumpumpe ist dadurch gekennzeichnet, dass an dem weiteren Teil oder an dem Teil der Vakuumpumpe, das eine weitere Auslassöffnung verdeckt, eine weitere Ausnehmung vorgesehen ist, die sich zu der weiteren Auslassöffnung hin öffnet. Die weitere Auslassöffnung wird vorzugsweise bei einem Rückdrehen des Rotors entgegen der normalen Betriebsdrehrichtung wirksam. Die weitere Ausnehmung ist gemäß einem der vorab beschriebenen Ausführungsbeispiele ausgeführt, aber auf der entgegengesetzten Seite des Flügeldichtkontakts mit der Umlaufkontur angeordnet.A further preferred embodiment of the vacuum pump is characterized in that a further recess is provided on the further part or on the part of the vacuum pump which conceals a further outlet opening, which opens to the further outlet opening. The further outlet opening is preferably effective in a reverse rotation of the rotor against the normal operating direction of rotation. The further recess is designed in accordance with one of the embodiments described above, but arranged on the opposite side of the Flügeldichtkontakts with the circulation contour.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung verschiedene Ausführungsbeispiele im Einzelnen beschrieben sind. Es zeigen:Further advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawings, various embodiments are described in detail. Show it:
Figur 1 eine Vakuumpumpe gemäß einem ersten Ausführungsbeispiel mit einem geöffneten Pumpengehäuse in der Draufsicht;1 shows a vacuum pump according to a first embodiment with an open pump housing in plan view;
Figur 2 eine perspektivische Darstellung der Vakuumpumpe aus Figur 1 mit einemFigure 2 is a perspective view of the vacuum pump of Figure 1 with a
Aufbruch im Bereich eines Schmiegespalts;Break in the area of a Schmiegespalts;
Figur 3 eine vergrößerte Darstellung des aufgebrochenen Bereichs aus Figur 2;Figure 3 is an enlarged view of the broken portion of Figure 2;
Figur 4 eine ähnliche Darstellung wie in Figur 2 gemäß einem weiteren Ausführungsbeispiel undFigure 4 is a similar view as in Figure 2 according to another embodiment and
Figur 5 einen vergrößerten Ausschnitt aus Figur 4. In den Figuren 1 bis 5 ist jeweils eine Vakuumpumpe 1 ; 41 in verschiedenen Ansichten dargestellt. Zur Bezeichnung gieicher Teiie werden die gleichen Bezugszeichen verwendet. Die Vakuumpumpe 1 ; 41 umfasst ein Gehäuse 2 mit einem Gehäusetopf 4, der in den Figuren 1 bis 5 ohne einen zugehörigen Gehäusedeckel, also im geöffneten Zustand dargestellt ist, damit man die im Inneren des Gehäusetopfs 4 angeordneten Teile der Vakuumpumpe 1 sieht.5 shows an enlarged detail of Figure 4. FIGS. 1 to 5 each show a vacuum pump 1; 41 shown in different views. The same reference numbers are used to designate the same. The vacuum pump 1; 41 includes a housing 2 with a housing pot 4, which is shown in Figures 1 to 5 without an associated housing cover, ie in the open state, so that you see the inside of the housing pot 4 arranged parts of the vacuum pump 1.
In dem Gehäusetopf 4 ist eine Umlaufkontur 5 ausgebildet, die auch als Hubkontur bezeichnet wird und einen Arbeitsraum im Inneren der Vakuumpumpe 1 in radialer Richtung begrenzt. In axialer Richtung ist der Arbeitsraum in der Vakuumpumpe 1 durch einen Topfboden 6 begrenzt, der eine axiale Gehäusebegrenzungsfläche des Arbeitsraums darstellt. In dem Gehäuse 2 ist ein Rotor 8 drehbar gelagert, der sich im Betrieb der Vakuumpumpe 1 in einer Betriebsdrehrichtung 24 dreht, die durch einen Pfeil angedeutet ist.In the housing pot 4, a circulation contour 5 is formed, which is also referred to as a stroke contour and limits a working space in the interior of the vacuum pump 1 in the radial direction. In the axial direction of the working space in the vacuum pump 1 is limited by a pot bottom 6, which is an axial housing boundary surface of the working space. In the housing 2, a rotor 8 is rotatably mounted, which rotates during operation of the vacuum pump 1 in an operating direction of rotation 24, which is indicated by an arrow.
In einem Flügelaufnahmeschlitz 9; 49 der sich durch den Rotor 8; 48 hindurch erstreckt und Wangen 11; 51 , 12; 52 aufweist, ist ein Flügel 14 innerhalb der Umlaufkontur 5 verschiebbar geführt. An den Enden des Flügels 14 sind Kappen 15, 16 angebracht, die an der Umlaufkontur 5 anliegen. Der Rotor 8; 48 schmiegt sich mit seiner Außenkontur in einem so genannten Schmiegespalt 18 an die Umlaufkontur 5.In a wing receiving slot 9; 49 extending through the rotor 8; 48 extends through and cheeks 11; 51, 12; 52, a wing 14 is slidably guided within the circulation contour 5. At the ends of the wing 14 caps 15, 16 are attached, which bear against the circulating contour 5. The rotor 8; 48 nestles with its outer contour in a so-called Schmiegespalt 18 to the circulation contour. 5
Durch den Rotor 8; 48 und den Flügel 14 wird der Arbeitsraum der Vakuumpumpe 1 in dem Gehäuse 2 in einen Saugraum 19 und einen Druckraum 20 unterteilt. Der Saugraum 19 wird auch als Saugkammer bezeichnet. Analog wird der Druckraum 20 auch als Druckkammer bezeichnet. Der Saugraum 19 steht mit einem Eingangsstutzen 17 der Vakuumpumpe 1 in Verbindung. Über den Eingangsstutzen 17 wird ein Arbeitsmedium, insbesondere Luft in den Saugraum 19 eingesaugt und in dem Druckraum 20 mit Öl zu einem Luft-Öl-Gemisch vermischt mit Druck beaufschlagt. In einer bevorzugten Anwendung wird die Vakuumpumpe, die wegen ihres einen Flügels 14 auch als Monoflügelzellenpumpe bezeichnet wird, dazu verwendet, einen Unterdruck, das heißt ein Vakuum, an einen Bremskraftverstärker eines Kraftfahrzeugs anzulegen.Through the rotor 8; 48 and the wing 14 of the working space of the vacuum pump 1 is divided in the housing 2 in a suction chamber 19 and a pressure chamber 20. The suction chamber 19 is also referred to as a suction chamber. Analogously, the pressure chamber 20 is also referred to as a pressure chamber. The suction chamber 19 communicates with an inlet port 17 of the vacuum pump 1 in connection. A working medium, in particular air, is sucked into the suction space 19 via the inlet connection 17 and mixed with oil in the pressure space 20 with oil to form an air-oil mixture subjected to pressure. In a preferred application, the vacuum pump, which is also referred to as a single-blade pump because of its one wing 14, is used to apply a negative pressure, that is to say a vacuum, to a brake booster of a motor vehicle.
Der Druckraum 20 steht über eine Auslassöffnung 21 unter Zwischenschaltung eines (nicht dargestellten) Rückschlagventils mit einem Kurbelgehäuse einer Brennkraftmaschine eines Kraftfahrzeugs in Verbindung. Durch die Auslassöffnung 21 wird das durch den Flügel 14 mit Druck beaufschlagte Arbeitsmedium aus dem Druckraum 20 der Vakuumpumpe 1 ausgeschoben. Die Auslassöffnung 21 erstreckt sich bis in die Nähe des Schmiegespalts 18.The pressure chamber 20 is connected via an outlet opening 21 with the interposition of a (not shown) check valve with a crankcase of an internal combustion engine of a motor vehicle in combination. Through the outlet opening 21 which is through the wing 14 with Pressure acted upon working fluid from the pressure chamber 20 of the vacuum pump 1 is ejected. The outlet opening 21 extends into the vicinity of the Schmiegespalts 18th
Eine weitere Auslassöffnung 22 ist in dem Saugraum 19 vorgesehen. Die weitere Auslassöffnung 22 steht unter Zwischenschaltung eines weiteren Rückschlagventils ebenfalls mit dem Kurbelgehäuse der Brennkraftmaschine in Verbindung. Die weitere Auslassöffnung 22 wird wirksam, wenn sich der Rotor 8 durch eine Fehlbedienung des Fahrzeugs beim Transport entgegen seiner normalen Betriebsdrehrichtung 24 dreht. Eine derartige Fehlbedienung des Fahrzeugs liegt zum Beispiel vor, wenn das Fahrzeug mit einem eingelegten Vorwärtsgang rückwärts von einer Rampe herunterrollt. Die beiden Auslassöffnungen 21, 22 sind beide in dem Topfboden 6 ausgespart und werden teilweise und zeitweise von dem Rotor 8; 48, dem Flügel 14 und den Kappen 15, 16 überdeckt.Another outlet opening 22 is provided in the suction chamber 19. The further outlet opening 22 is also connected to the crankcase of the internal combustion engine with the interposition of another check valve. The further outlet opening 22 is effective when the rotor 8 rotates due to incorrect operation of the vehicle during transport against its normal operating direction of rotation 24. Such a malfunction of the vehicle is, for example, when the vehicle rolls backwards from a ramp with an engaged forward gear. The two outlet openings 21, 22 are both recessed in the pot bottom 6 and are partially and temporarily from the rotor 8; 48, the wing 14 and the caps 15, 16 covered.
Der Flügelaufnahmeschlitz 9; 49 erstreckt sich mit seinen beiden Wangen 11 , 12; 51, 52 durch den Rotor 8 hindurch. Bei einer Drehbewegung des Rotors 8 entsteht an der Kappe 15 vor dem Schmiegespalt 18 eine Arbeitsmediumwelle an der Umlaufkontur 5. Die Arbeitsmedi- umwelle wird durch die Auslassöffnung 21 ausgeschoben.The wing receiving slot 9; 49 extends with its two cheeks 11, 12; 51, 52 through the rotor 8 therethrough. During a rotational movement of the rotor 8, a working medium shaft is formed on the circulating contour 5 on the cap 15 in front of the lubricating gap 18. The working medium shaft is pushed out through the outlet opening 21.
Bei dem in den Figuren 1 bis 3 dargestellten Ausführungsbeispiel wird ein Teil der Auslassöffnung 21 , der vorher durch den Rotor 8 verdeckt war, durch die Ausnehmung 25 freigegeben, wodurch ein größerer Auslassquerschnitt in dem kritischen Bereich zwischen dem Flügel 14 beziehungsweise der Kappe 15 und dem Schmiegespalt 18 im Hinblick auf den abzubauenden Überdruck freigegeben wird. Die Ausnehmung 25 stellt sicher, dass der verbleibende Druckraum vor dem Flügel 14 mit der Auslassöffnung 21 verbunden wird. In den Figuren 2 und 3 sieht man, dass die Ausnehmung 25 als Fase ausgeführt ist. Eine weitere, ebenfalls als Fase ausgebildete Ausnehmung 26 ist in dem Flügelaufnahmeschlitz 9 diagonal gegenüber an der Wange 12 vorgesehen.In the embodiment illustrated in FIGS. 1 to 3, a part of the outlet opening 21, which was previously covered by the rotor 8, is released through the recess 25, whereby a larger outlet cross-section in the critical area between the wing 14 and the cap 15 and the Schmiegespalt 18 is released in view of the pressure to be degraded. The recess 25 ensures that the remaining pressure space in front of the wing 14 is connected to the outlet opening 21. In FIGS. 2 and 3 it can be seen that the recess 25 is designed as a chamfer. Another, also formed as a chamfer recess 26 is provided in the wing receiving slot 9 diagonally opposite to the cheek 12.
In den Figuren 4 und 5 sieht man, dass an der Wange 51 des Flügelaufnahmeschlitzes 49 des Rotors 48 auch eine partielle Ausnehmung 65, zum Beispiel als Abschrägung einer Ecke, vorgesehen sein kann, die sich zu der Auslassöffnung 21 hin öffnet. Bezuqsze ichen I isteIn FIGS. 4 and 5 it can be seen that on the cheek 51 of the wing receiving slot 49 of the rotor 48 there can also be provided a partial recess 65, for example as a bevel of a corner, which opens towards the outlet opening 21. I have to say
Figure imgf000007_0001
Figure imgf000007_0001

Claims

Patentansprüche claims
1. Vakuumpumpe, insbesondere Flügelzellenpumpe, mit einem Rotor (8;48), der um eine Drehachse drehbar ist und durch den mindestens ein Flügel (14) hin und her bewegbar innerhalb einer Umlaufkontur (5) geführt ist, an welcher sich der Rotor (8;48) in einem Schmiegespalt (18) anschmiegt, in dessen Nähe eine Auslassöffnung (21 ) in einer axialen Gehäusebegrenzungsfläche (6) vorgesehen ist, dadurch gekennzeichnet, dass an einem Teil (8) der Vakuumpumpe (1 ;41 ), das, zumindest zeitweise, die Auslassöffnung (21 ) teilweise verdeckt, mindestens eine Ausnehmung (25,26;65) vorgesehen ist, die sich zur Auslassöffnung (21 ) hin öffnet.1. A vacuum pump, in particular a vane pump, with a rotor (8, 48) which is rotatable about an axis of rotation and is guided by the at least one vane (14) back and forth within a circulating contour (5), on which the rotor ( 8, 48) in a nip (18), in the vicinity of which an outlet opening (21) is provided in an axial housing boundary surface (6), characterized in that on a part (8) of the vacuum pump (1, 41), at least at times, the outlet opening (21) partially hidden, at least one recess (25,26; 65) is provided, which opens to the outlet opening (21) out.
2. Vakuumpumpe nach Anspruch 1 , dadurch gekennzeichnet, dass die Ausnehmung (25,26;65), zumindest teilweise, in Überdeckung zu der Auslassöffnung (21) angeordnet ist.2. Vacuum pump according to claim 1, characterized in that the recess (25,26; 65), at least partially, in overlap with the outlet opening (21) is arranged.
3. Vakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ausnehmung (25,26;65) an einem Teil des Rotors (8;48) vorgesehen ist.3. Vacuum pump according to one of the preceding claims, characterized in that the recess (25,26; 65) on a part of the rotor (8; 48) is provided.
4. Vakuumpumpe nach Anspruch 3, dadurch gekennzeichnet, dass die Ausnehmung (25,26;65) an einer Wange (11 ,12;51 , 52) eines Flügelaufnahmeschlitzes (9;49) des Rotors (8;48) vorgesehen ist.4. Vacuum pump according to claim 3, characterized in that the recess (25,26; 65) on a cheek (11, 12; 51, 52) of a wing receiving slot (9; 49) of the rotor (8; 48) is provided.
5. Vakuumpumpe nach Anspruch 4, dadurch gekennzeichnet, dass die Ausnehmung (25,26;65) radial außen an der Wange (11,12;51,52) des Flügelaufnahmeschlitzes (9;49) des Rotors (8;48) vorgesehen ist.5. Vacuum pump according to claim 4, characterized in that the recess (25,26; 65) is provided radially outward on the cheek (11,12; 51,52) of the wing receiving slot (9; 49) of the rotor (8; 48) ,
6. Vakuumpumpe nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass die Ausnehmung (25,26) als Fase ausgeführt ist, die sich in axialer Richtung erstreckt.6. Vacuum pump according to one of claims 4 or 5, characterized in that the recess (25,26) is designed as a chamfer, which extends in the axial direction.
7. Vakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ausnehmung an einer Kappe (15,16) vorgesehen ist, die an einem Ende des Flügels (14) angebracht ist.7. Vacuum pump according to one of the preceding claims, characterized in that the recess on a cap (15,16) is provided, which is attached to one end of the wing (14).
8. Vakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ausnehmung an dem Flügel (14) vorgesehen ist. 8. Vacuum pump according to one of the preceding claims, characterized in that the recess is provided on the wing (14).
9. Vakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ausnehmung (65) als Abschrägung einer Ecke an einem Flügelschlitz (49) des Rotors (48) vorgesehen ist.9. Vacuum pump according to one of the preceding claims, characterized in that the recess (65) is provided as a chamfer of a corner on a wing slot (49) of the rotor (48).
10. Vakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass an einem weiteren oder dem Teil (8) der Vakuumpumpe (1 ;41 ), das eine weitere Auslassöffnung (22) verdeckt, eine weitere Ausnehmung vorgesehen ist, die sich zu der weiteren Auslassöffnung (22) hin öffnet. 10. Vacuum pump according to one of the preceding claims, characterized in that at a further or the part (8) of the vacuum pump (1; 41), which obscures a further outlet opening (22), a further recess is provided, which extends to the other Outlet opening (22) opens.
PCT/EP2009/006463 2008-09-16 2009-09-07 Vacuum pump WO2010031504A2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011134448A3 (en) * 2010-04-26 2013-03-07 Ixetic Hückeswagen Gmbh Vacuum pump
CN106704196A (en) * 2017-01-23 2017-05-24 世特科汽车工程产品（常州）有限公司 Vacuum pump blade and manufacturing method and device
CN109891098A (en) * 2016-11-03 2019-06-14 大丰工业株式会社 Vane pump
CN109923313A (en) * 2016-11-03 2019-06-21 大丰工业株式会社 Vane pump
US10619638B2 (en) 2015-06-24 2020-04-14 Pierburg Pump Technology Gmbh Mechanical automotive vacuum pump with cantilevered rotor

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GB326180A (en) * 1928-09-28 1930-02-28 Wiltse Appliance Company Improvements in rotary pumps
DE2235045A1 (en) * 1972-07-17 1974-01-31 Siemens Ag ROTARY VALVE PUMP WITH A CIRCULAR ROTOR
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DE3734573A1 (en) * 1986-10-18 1988-04-28 Barmag Barmer Maschf Vane pump
EP0401968A2 (en) * 1989-06-06 1990-12-12 Ford Motor Company Limited A rotary compressor
DE102005045355A1 (en) * 2005-09-23 2007-03-29 Bayerische Motoren Werke Ag Low pressure vane-cell pump for use in motor vehicle, has rotatable impeller, which is driven by drive shaft, and recess over coating gas outlet in area of gap and provided in drive shaft, where elastic unit is arranged in recess

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB326180A (en) * 1928-09-28 1930-02-28 Wiltse Appliance Company Improvements in rotary pumps
DE2235045A1 (en) * 1972-07-17 1974-01-31 Siemens Ag ROTARY VALVE PUMP WITH A CIRCULAR ROTOR
EP0264749A2 (en) * 1986-10-18 1988-04-27 B a r m a g AG Sliding vane vacuum pump
DE3734573A1 (en) * 1986-10-18 1988-04-28 Barmag Barmer Maschf Vane pump
EP0401968A2 (en) * 1989-06-06 1990-12-12 Ford Motor Company Limited A rotary compressor
DE102005045355A1 (en) * 2005-09-23 2007-03-29 Bayerische Motoren Werke Ag Low pressure vane-cell pump for use in motor vehicle, has rotatable impeller, which is driven by drive shaft, and recess over coating gas outlet in area of gap and provided in drive shaft, where elastic unit is arranged in recess

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011134448A3 (en) * 2010-04-26 2013-03-07 Ixetic Hückeswagen Gmbh Vacuum pump
US10619638B2 (en) 2015-06-24 2020-04-14 Pierburg Pump Technology Gmbh Mechanical automotive vacuum pump with cantilevered rotor
CN109891098A (en) * 2016-11-03 2019-06-14 大丰工业株式会社 Vane pump
CN109923313A (en) * 2016-11-03 2019-06-21 大丰工业株式会社 Vane pump
US11306718B2 (en) 2016-11-03 2022-04-19 Taiho Kogyo Co., Ltd. Vane pump
US11346343B2 (en) 2016-11-03 2022-05-31 Taiho Kogyo Co., Ltd. Vane pump including pressure relief groove
CN106704196A (en) * 2017-01-23 2017-05-24 世特科汽车工程产品（常州）有限公司 Vacuum pump blade and manufacturing method and device

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