WO2018010793A1 - Motor vehicle vacuum pump - Google Patents

Motor vehicle vacuum pump Download PDF

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Publication number
WO2018010793A1
WO2018010793A1 PCT/EP2016/066731 EP2016066731W WO2018010793A1 WO 2018010793 A1 WO2018010793 A1 WO 2018010793A1 EP 2016066731 W EP2016066731 W EP 2016066731W WO 2018010793 A1 WO2018010793 A1 WO 2018010793A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
lubricant
motor vehicle
vacuum pump
vehicle vacuum
Prior art date
Application number
PCT/EP2016/066731
Other languages
German (de)
French (fr)
Inventor
Steffen Schnurr
Original Assignee
Pierburg Pump Technology 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 Pierburg Pump Technology Gmbh filed Critical Pierburg Pump Technology Gmbh
Priority to US16/317,031 priority Critical patent/US20190226483A1/en
Priority to PCT/EP2016/066731 priority patent/WO2018010793A1/en
Priority to EP16738786.9A priority patent/EP3485167A1/en
Priority to CN201680087398.4A priority patent/CN109416043B/en
Publication of WO2018010793A1 publication Critical patent/WO2018010793A1/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
    • 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
    • F04C29/025—Lubrication; Lubricant separation using a lubricant 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
    • 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
    • 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
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C29/0071—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft
    • 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
    • F04C29/021—Control systems for the circulation of the lubricant
    • 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 motor vehicle vacuum pump with a pump housing, which includes a pump chamber in which a pump rotor with at least one displaceably mounted pump rotor blades is rotatably supported by pump rotor bearing means, directly or indirectly by means of a coupling unit rotatably with the Pump rotor is connected to a drive shaft is connectable, wherein a lubricant supply arrangement for lubricating the pump chamber and / or the pump rotor bearing means and / or the coupling unit is provided, wherein the
  • Lubricant supply arrangement comprises at least one stationary Schmlerffen supply channel in the pump housing, through which the lubricant is pumpable from a lubricant inlet opening of the pump housing in the direction of the pump chamber and / or the pump rotor bearing means and / or the coupling unit to a lubricant outlet port, wherein a sealing member is provided in the area of the lubricant inlet opening and a filter element is provided in the lubricant inlet opening.
  • a mechanical automotive vacuum pump which has a lubricant supply arrangement in which by a stationary lubricant supply channel in the pump housing, the liquid lubricant via a lubricant outlet opening in an axially extending lubricant channel in the hollow cylindrical surface of the Pump housing is passed, which is ensured by a sliding bearing of the pump rotor.
  • the lubricant supply arrangement ensures the lubrication of the running surface of the at least one rotor blade in the pump housing.
  • a lubricant pump is provided which pumps lubricant to a lubricant inlet port.
  • This vacuum pump is rotatably coupled via a plug-in coupling arrangement with the crankshaft or the drive shaft of the internal combustion engine.
  • the plug-in coupling arrangement consists of mutually complementary plug-in coupling elements which have one or more jaws which engage in corresponding recesses of the respective other plug-in coupling element.
  • a filter element is provided in the region of the lubricant inlet port.
  • a sealing member is provided to prevent lubricant from unintentionally getting outside the lubricant supply arrangement. This construction is relatively expensive and sensitive to dynamic loads in terms of sealing function.
  • the object of the invention is in contrast to provide a motor vehicle vacuum pump with a simply constructed lubricant supply, which avoids the above-mentioned Wegelle.
  • sealing member and the filter element is designed as a combined seal filter unit.
  • Lubricant supply arrangement ensured.
  • a lubrication of the pump chamber, the pump rotor bearing means and / or the coupling unit may be provided.
  • this can be both mechanical and electrical vacuum pumps.
  • the sealing member is disposed on an edge member of the filter element.
  • a conventional Filter element to be used for the production of the combined sealing filter unit is understood here a one-piece or multi-part filter element.
  • the combined seal-filter unit may be integrally formed. It is particularly advantageous if the sealing member is molded onto the filter element.
  • the filter element has a filter nozzle, which serves to limit the flow rate.
  • a pump rotor outer surface is mounted in a wooden cylinder surface of the pump housing, wherein the lubricant supply arrangement is designed such that the lubricant outlet port is at least temporarily fluidly connected to an axially extending lubricant channel in the hollow cylinder surface.
  • the lubricant supply arrangement can also be designed differently. In particular, further channels and openings may be provided.
  • the lubricant channel is open to the pump chamber, such that lubricant can be transferred into the pump chamber.
  • lubrication of the tread is ensured in a simple manner.
  • FIG. 1 shows a longitudinal section of a motor vehicle vacuum pump according to the invention
  • FIG. 2 shows an enlarged view of a combined sealing filter unit of the motor vehicle vacuum pump from FIG. 1.
  • FIG. 1 schematically shows a vacuum pump arrangement which consists essentially of a motor vehicle vacuum pump 2, an internal combustion engine 4 and a lubricant pump 6 assigned to the internal combustion engine 4.
  • the vacuum pump 2 is here coupled mechanically via a plug-in coupling arrangement 8 with a crankshaft or a drive shaft of the internal combustion engine 4.
  • a plug-in coupling arrangement 8 with a crankshaft or a drive shaft of the internal combustion engine 4.
  • the vacuum pump 2 serves, for example, to provide actuator-specific vacuum for various ancillary components of the motor vehicle, for example for a pneumatic brake booster.
  • the lubricant pump 6 conveys the liquid lubricant for the lubricant supply of the engine 4 and the lubricant supply of the vacuum pump 2.
  • the vacuum pump 2 is a so-called vane pump and has a PumpengehSuse 10, which is essentially formed by a housing body 12 and a housing cover 14.
  • a rotatably mounted about a longitudinal axis pump rotor 16 is arranged with a displaceably mounted pump rotor blades 18.
  • the eccentrically mounted pump rotor blade 18 is guided with both ends over a running surface 20 of the housing body 12, such that air sucked in via an air inlet pipe 22 in an enclosed by the pump housing 10 and through the Pump rotor 16 divided pump chamber 23 is compressed and ejected via a not shown air outlet.
  • the pump rotor 16 has a pump rotor outer surface 24, which forms a slide bearing assembly 28 together with a hollow cylindrical surface 26 of the pump housing 10.
  • a lubricant supply assembly 30 is provided, which is fluidly connected to the lubricant pump 6.
  • the pump housing 10 has a flange surface 32 which bears against a suitable internal combustion engine housing part.
  • a coupling unit 34 of the clutch assembly 8 is provided which is rotatably coupled in a known manner with the pump rotor 16.
  • a lubricant inlet opening 36 is arranged in the flange surface 32 in which a combined seal-filter unit 38 is provided by means of a press fit.
  • the combined sealing-filter unit 38 in the present exemplary embodiment consists of a filter element 40 which, in the present exemplary embodiment, essentially has a filter nozzle 41 for limiting the flow rate, an edge member 42 and a filter disk 44 clicked on. On the edge member 42, an annular sealing member 45 is slipped.
  • the combined seal filter unit 38 may also be integrally formed.
  • the one-piece construction relates in principle to a one-piece design of the edge member 42 of the filter element 40 with the sealing member 45, wherein the sealing member 45 is molded onto the filter element 40.
  • the filter disk 44 may additionally be integrated via injection molding.
  • the lubricant is thus from the lubricant pump 6 via the inlet opening 36 with the combined braid-filter unit 38 in a subsequent lubricant supply channel 46 of the lubricant supply assembly 30 pumped, represented by a solid line.
  • the lubricant supply channel 46 has a lubricant outlet opening 48, which in turn is at least temporarily fluidly connected to an axially extending lubricant channel 50 in the hollow cylinder surface 26 when the pump rotor 16 rotates.
  • the slide bearing assembly 28 is sufficiently supplied with lubricant in this way.
  • lubricant channel 50 Due to the fact that the lubricant channel 50 is opened and expanded to the pump chamber 23, lubricant is introduced into the pump chamber and lubricates the running surface 20 on known catfish and returns to the lubricant pump 6 via an outlet, not shown, represented by a dashed line.
  • the coupling unit 34 may be included in the lubricant supply.
  • the pump rotor bearing means can take place.

Abstract

The invention relates to a motor vehicle vacuum pump (2) comprising a pump housing (10) that encloses a pump chamber (23) in which a pump rotor (16) with at least one movably mounted pump rotor blade (18) is rotatably mounted via bearing means (28), said pump rotor being directly or indirectly connectable to a driveshaft by means of a coupling unit (34) which is rotationally fixed to the pump rotor (16). A lubricant supply assembly (30) is provided for lubricating the pump chamber (23) and/or the pump rotor bearing means (28) and/or the coupling unit (34), and the lubricant supply assembly (30) has at least one stationary lubricant supply channel (46) in the pump housing (10), wherein the lubricant can be pumped through the supply channel from a lubricant inlet opening (36) of the pump housing (10) in the direction of the pump chamber (23) and/or the pump rotor bearing means (28) and/or the coupling unit (34) to a lubricant outlet opening (48). A seal element (45) is provided in the region of the lubricant inlet opening (36), and a filter element (40) is provided in the lubricant inlet opening (36), said seal element (45) and filter element (40) being formed as a combination seal/filter unit (38).

Description

Kfz-Vakuumpumpe  Automotive vacuum pump
Die Erfindung bezieht sich auf eine Kfz-Vakuumpumpe mit einem Pumpengehäuse, das einen Pumpenraum einschließt, in dem ein Pumpenrotor mit mindestens einem verschieblich gelagerten Pumpenrotorflügel drehbar über Pumpenrotor-Lagermittel gelagert ist, der direkt oder indirekt mittels einer Kupplungs-Einheit, die drehfest mit dem Pumpenrotor verbunden ist, mit einer Antriebswelle verbindbar ist, wobei eine Schmiermittelversorgungsanordnung zum Schmieren des Pumpenraumes und/oder der Pumpenrotor-Lagermittel und/oder der Kupplungs-Einheit vorgesehen ist, wobei dieThe invention relates to a motor vehicle vacuum pump with a pump housing, which includes a pump chamber in which a pump rotor with at least one displaceably mounted pump rotor blades is rotatably supported by pump rotor bearing means, directly or indirectly by means of a coupling unit rotatably with the Pump rotor is connected to a drive shaft is connectable, wherein a lubricant supply arrangement for lubricating the pump chamber and / or the pump rotor bearing means and / or the coupling unit is provided, wherein the
Schmiermittelversorgungsanordnung zumindest einen stationären Schmlermittel-Versorgungskanal in dem Pumpengehäuse aufweist, durch den das Schmiermittel von einer Schmiermittel-Einlassöffnung des Pumpengehäuses in Richtung des Pumpenraumes und/oder der Pumpenrotor-Lagermittel und/oder der Kupplungs-Einheit zu einer Schmiermittel-Auslassöffnung pumpbar Ist, wobei im Bereich der Schmiermittel-Einlassöffnung ein Dichtungsorgan und in der Schmiermlttel-Einlassöffnung ein Filterelement vorgesehen sind. Lubricant supply arrangement comprises at least one stationary Schmlermittel supply channel in the pump housing, through which the lubricant is pumpable from a lubricant inlet opening of the pump housing in the direction of the pump chamber and / or the pump rotor bearing means and / or the coupling unit to a lubricant outlet port, wherein a sealing member is provided in the area of the lubricant inlet opening and a filter element is provided in the lubricant inlet opening.
Aus der WO 2013/024117 A2 ist beispielsweise eine mechanische Kfz- Vakuumpumpe bekannt, die eine Schmiermittelversorgungsanordnung aufweist, bei der durch einen stationären Schmiermittel-Versorgungskanal in dem Pumpengehäuse das flüssige Schmiermittel über eine Schmiermittel-Auslassöffnung in einen in Axialrichtung verlaufenden Schmiermittelkanal in der Hohlzylinderfläche des Pumpengehäuses übergeben wird, wodurch durch eine Gleitlagerung des Pumpenrotors gewährleistet ist. Auch hier wird durch die Schmiermittelversorgungsanordnung die Schmierung der Lauffläche des mindestens einen Rotorflügels im Pumpengehäuse gewährleistet. Hierzu ist außerhalb der Vakuumpumpe eine Schmiermittelpumpe vorgesehen, die Schmiermittel zu einer Schmiermittel-Einlassöffnung pumpt. Diese Vakuumpumpe wird über eine Steckkupplungs-Anordnung mit der Kurbelwelle oder der Antriebswelle des Verbrennungsmotors drehfest gekoppelt. Die Steckkupplungs-Anordnung besteht aus komplementär zueinander ausgebildeten Steckkupplungs-Elementen, die eine oder mehrere Klauen aufweisen, die in entsprechende Ausnehmungen des jeweils anderen Steckkupplungs-Elementes eingreifen. From WO 2013/024117 A2, for example, a mechanical automotive vacuum pump is known which has a lubricant supply arrangement in which by a stationary lubricant supply channel in the pump housing, the liquid lubricant via a lubricant outlet opening in an axially extending lubricant channel in the hollow cylindrical surface of the Pump housing is passed, which is ensured by a sliding bearing of the pump rotor. Again, the lubricant supply arrangement ensures the lubrication of the running surface of the at least one rotor blade in the pump housing. For this is outside the vacuum pump, a lubricant pump is provided which pumps lubricant to a lubricant inlet port. This vacuum pump is rotatably coupled via a plug-in coupling arrangement with the crankshaft or the drive shaft of the internal combustion engine. The plug-in coupling arrangement consists of mutually complementary plug-in coupling elements which have one or more jaws which engage in corresponding recesses of the respective other plug-in coupling element.
Um die Schmiermittelversorgungsanordnung vor Verunreinigung zu schützen, ist im Bereich der Schmiermlttel-Einlassöffnung ein Filterelement vorgesehen. Zudem ist ein Dichtungsorgan vorgesehen, um zu verhindern, dass Schmiermittel ungewollt außerhalb der Schmiermittelversorgungsanordnung gelangt. Diese Konstruktion ist verhältnismäßig aufwendig und hinsichtlich der Dichtfunktion empfindlich gegenüber dynamischen Belastungen. To protect the lubricant supply assembly from contamination, a filter element is provided in the region of the lubricant inlet port. In addition, a sealing member is provided to prevent lubricant from unintentionally getting outside the lubricant supply arrangement. This construction is relatively expensive and sensitive to dynamic loads in terms of sealing function.
Aufgabe der Erfindung ist es demgegenüber, eine Kfz-Vakuumpumpe mit einer einfach konstruierten Schmiermittelversorgung zu schaffen, die die oben genannten Nachtelle vermeidet. The object of the invention is in contrast to provide a motor vehicle vacuum pump with a simply constructed lubricant supply, which avoids the above-mentioned Nachtelle.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass das Dichtungsorgan und das Filterelement als kombinierte Dichtungs-Filter- Einheit ausgebildet ist. Hierdurch wird auf besonders einfache und kostengünstige Weise die Funktion derThis object is achieved in that the sealing member and the filter element is designed as a combined seal filter unit. As a result, in a particularly simple and cost-effective manner, the function of
Schmiermittelversorgungsanordnung sichergestellt. Hierbei kann je nach Anwendungsfall eine Schmierung des Pumpenraumes, der Pumpenrotor- Lagermittel und/oder der Kupplungs-Einheit vorgesehen sein. Es kann sich hierbei natürlich sowohl um mechanische als auch um elektrische Vakuumpumpen handeln. Lubricant supply arrangement ensured. Here, depending on the application, a lubrication of the pump chamber, the pump rotor bearing means and / or the coupling unit may be provided. Of course, this can be both mechanical and electrical vacuum pumps.
Vorzugsweise ist das Dichtungsorgan auf einem Randorgan des Filterelementes angeordnet. Auf diese Weise kann ein herkömmliches Filterelement zur Herstellung der kombinierten Dichtungs-Filter-Einheit genutzt werden. Unter Filterelement wird hierbei ein ein- oder mehrteiliges Filterelement verstanden. Preferably, the sealing member is disposed on an edge member of the filter element. In this way, a conventional Filter element to be used for the production of the combined sealing filter unit. Under filter element is understood here a one-piece or multi-part filter element.
Alternativ kann die kombinierte Dichtungs-Filter-Einheit einstückig ausgebildet sein. Hierbei ist es besonders vorteilhaft, wenn das Dichtungsorgan an das Filterelement angespritzt ist. Alternatively, the combined seal-filter unit may be integrally formed. It is particularly advantageous if the sealing member is molded onto the filter element.
In besonders vorteilhafter Weise weist das Filterelement eine Filterdüse auf, die einer Begrenzung der Durchflussmenge dient. In a particularly advantageous manner, the filter element has a filter nozzle, which serves to limit the flow rate.
In einer besonders vorteilhaften Ausführungsform ist eine Pumpenrotor- Außenfläche in einer Holzylinderfläche des Pumpengehäuses gelagert, wobei die Schmiermittelversorgungsanordnung derart ausgeführt ist, dass die Schmiermittel-Auslassöffnung zumindest vorübergehend fluidisch mit einem in Axialrichtung verlaufenden Schmiermittelkanal in der Hohlzylinderfläche verbunden ist. Natürlich kann die Schmiermittelversorgungsanordnung auch anders ausgeführt sein. Insbesondere können weitere Kanäle und Öffnungen vorgesehen sein. In a particularly advantageous embodiment, a pump rotor outer surface is mounted in a wooden cylinder surface of the pump housing, wherein the lubricant supply arrangement is designed such that the lubricant outlet port is at least temporarily fluidly connected to an axially extending lubricant channel in the hollow cylinder surface. Of course, the lubricant supply arrangement can also be designed differently. In particular, further channels and openings may be provided.
In einer besonders vorteilhaften Ausführungsform ist der Schmiermittelkanal zum Pumpenraum geöffnet, derart, dass Schmiermittel in den Pumpenraum überführbar ist. Hierdurch wird auf einfache Art und Weise eine Schmierung der Lauffläche gewährleistet. Hierbei ist es vorteilhaft, wenn der Schmiermittelkanal sich zum Pumpenraum hin aufweitet. In a particularly advantageous embodiment, the lubricant channel is open to the pump chamber, such that lubricant can be transferred into the pump chamber. As a result, lubrication of the tread is ensured in a simple manner. In this case, it is advantageous if the lubricant channel widens toward the pump chamber.
Im Folgenden wird unter Bezugnahme auf die Zeichnungen ein Ausführungsbeispiel der Erfindung näher erläutert. Es zeigen: Figur 1 einen Längsschnitt einer erfindungsgemäßen Kfz-Vakuumpumpe, und Figur 2 eine vergrößerte Darstellung einer kombinierten Dichtungs-Filter^ Einheit der Kfz-Vakuumpumpe aus Figur 1. In the following an embodiment of the invention will be explained in more detail with reference to the drawings. FIG. 1 shows a longitudinal section of a motor vehicle vacuum pump according to the invention, and FIG. 2 shows an enlarged view of a combined sealing filter unit of the motor vehicle vacuum pump from FIG. 1.
In der Figur 1 ist schematisch eine Vakuumpumpen-Anordnung dargestellt, die im Wesentlichen aus einer Kfz-Vakuumpumpe 2, einem Verbrennungsmotor 4 und einer dem Verbrennungsmotor 4 zugeordneten Schmiermittelpumpe 6 besteht. Die Vakuumpumpe 2 ist hier mechanisch über eine Steckkupplungs-Anordnung 8 mit einer Kurbelwelle oder einer Antriebsweile des Verbrennungsmotors 4 rotatorisch gekoppelt. Sie könnte jedoch auch als elektrische Vakuumpumpe ausgeführt sein. Eine derartige elektrische Vakuumpumpe könnte dann auch direkt ohne Zwischenschaltung einer Kupplungs-Anordnung mit einer Antriebswelle verbunden sein. Die Vakuumpumpe 2 dient beispielsweise dazu, für verschiedene Nebenaggregate des Kraftfahrzeugs aktuatorisches Vakuum zur Verfügung zu stellen, beispielsweise für einen pneumatischen Bremskraftverstärker. Die Schmiermittelpumpe 6 fördert das flüssige Schmiermittel für die Schmiermittelversorgung des Verbrennungsmotors 4 und die Schmiermittelversorgung der Vakuumpumpe 2. FIG. 1 schematically shows a vacuum pump arrangement which consists essentially of a motor vehicle vacuum pump 2, an internal combustion engine 4 and a lubricant pump 6 assigned to the internal combustion engine 4. The vacuum pump 2 is here coupled mechanically via a plug-in coupling arrangement 8 with a crankshaft or a drive shaft of the internal combustion engine 4. However, it could also be designed as an electric vacuum pump. Such an electric vacuum pump could then also be connected directly to a drive shaft without the interposition of a coupling arrangement. The vacuum pump 2 serves, for example, to provide actuator-specific vacuum for various ancillary components of the motor vehicle, for example for a pneumatic brake booster. The lubricant pump 6 conveys the liquid lubricant for the lubricant supply of the engine 4 and the lubricant supply of the vacuum pump 2.
Die Vakuumpumpe 2 ist eine sogenannte Flügelzellenpumpe und weist ein PumpengehSuse 10 auf, das im Wesentlichen von einem Gehäusekörper 12 und einem Gehäusedeckel 14 gebildet wird. In dem Pumpengehäuse 10 ist ein um eine Längsachse drehbar gelagerter Pumpenrotor 16 mit einem verschieblich gelagerten Pumpenrotorflügel 18 angeordnet. Zur Erzeugung eines Vakuums, das einem Verbraucher zur Verfügung gestellt wird, wird der exzentrisch gelagerte Pumpenrotorflügel 18 mit beiden Enden über eine Lauffläche 20 des Gehäusekörpers 12 geführt, derart, dass über einen Lufteinlassstutzen 22 angesaugte Luft In einem durch das Pumpengehäuse 10 eingeschlossenen und durch den Pumpenrotor 16 zweigeteilten Pumpenraum 23 komprimiert und über einen nicht weiter dargestellten Luftauslassstutzen ausgestoßen wird. Der Pumpenrotor 16 besitzt eine Pumpenrotor-Außenfläche 24, die zusammen mit einer Hohlzylinderfläche 26 des Pumpengehäuses 10 eine Gleitlageranordnung 28 ausbildet. Um eine Schmiermittelversorgung dieser Gleitlageranordnung 28 und der Lauffläche 20 des Gehäusekörpers 12 zu gewährleisten, ist eine Schmiermittelversorgungsanordnung 30 vorgesehen, die mit der Schmiermittelpumpe 6 fluidisch verbunden ist. The vacuum pump 2 is a so-called vane pump and has a PumpengehSuse 10, which is essentially formed by a housing body 12 and a housing cover 14. In the pump housing 10, a rotatably mounted about a longitudinal axis pump rotor 16 is arranged with a displaceably mounted pump rotor blades 18. To generate a vacuum that is made available to a consumer, the eccentrically mounted pump rotor blade 18 is guided with both ends over a running surface 20 of the housing body 12, such that air sucked in via an air inlet pipe 22 in an enclosed by the pump housing 10 and through the Pump rotor 16 divided pump chamber 23 is compressed and ejected via a not shown air outlet. The pump rotor 16 has a pump rotor outer surface 24, which forms a slide bearing assembly 28 together with a hollow cylindrical surface 26 of the pump housing 10. In order to ensure a lubricant supply of this sliding bearing assembly 28 and the running surface 20 of the housing body 12, a lubricant supply assembly 30 is provided, which is fluidly connected to the lubricant pump 6.
Das Pumpengehäuse 10 weist eine Flanschfläche 32 auf, die an einem geeigneten Verbrennungsmotorgehäuseteil anliegt. Zur Kopplung mit einer nicht weiter dargestellten Antriebswelle ist eine Kupplungseinheit 34 der Kupplungs-Anordnung 8 vorgesehen, die auf bekannte Weise drehfest mit dem Pumpenrotor 16 gekoppelt ist. The pump housing 10 has a flange surface 32 which bears against a suitable internal combustion engine housing part. For coupling with a drive shaft, not shown, a coupling unit 34 of the clutch assembly 8 is provided which is rotatably coupled in a known manner with the pump rotor 16.
Um nun eine dichte und schmutzfreie Schmiermittelversorgung sicherzustellen, die darüber hinaus auch noch hohen dynamischen Belastungen standhält, ist in der Flanschfläche 32 eine Schmiermittel- Einlassöffnung 36 angeordnet, in der mittels einer Presspassung eine kombinierte Dichtungs-Filter-Einheit 38 vorgesehen ist. Wie insbesondere Figur 2 zeigt, besteht die kombinierte Dichtungs-Filter-Einheit 38 im vorliegenden Ausführungsbeispiel aus einem Filterelement 40, das im vorliegenden Ausführungsbeispiel im Wesentlichen eine Filterdüse 41 zur Begrenzung der Durchflussmenge, ein Randorgan 42 und eine eingeklickte Filterscheibe 44 aufweist. Auf das Randorgan 42 ist ein ringförmiges Dichtungsorgan 45 gestülpt. Alternativ kann die kombinierte Dichtungs- Filter-Einheit 38 auch einstückig ausgebildet sein. Die Einstückigkeit bezieht sich hierbei prinzipiell auf eine einstückige Ausführung des Randorgans 42 des Filterelementes 40 mit dem Dichtungsorgan 45, wobei das Dichtungsorgan 45 an das Filterelement 40 angespritzt ist. Die Filterscheibe 44 kann jedoch zusätzlich auch über Spritzguss integriert sein. In order to ensure a dense and dirt-free lubricant supply, which in addition also withstands high dynamic loads, a lubricant inlet opening 36 is arranged in the flange surface 32 in which a combined seal-filter unit 38 is provided by means of a press fit. As shown particularly in FIG. 2, the combined sealing-filter unit 38 in the present exemplary embodiment consists of a filter element 40 which, in the present exemplary embodiment, essentially has a filter nozzle 41 for limiting the flow rate, an edge member 42 and a filter disk 44 clicked on. On the edge member 42, an annular sealing member 45 is slipped. Alternatively, the combined seal filter unit 38 may also be integrally formed. The one-piece construction relates in principle to a one-piece design of the edge member 42 of the filter element 40 with the sealing member 45, wherein the sealing member 45 is molded onto the filter element 40. However, the filter disk 44 may additionally be integrated via injection molding.
Das Schmiermittel wird also von der Schmiermittelpumpe 6 über die Einlassöffnung 36 mit der kombinierten DIchtungs-FIlter-Einheit 38 in einen sich anschließenden Schmiermittel-Versorgungskanal 46 der Schmiermittelversorgungsanordnung 30 gepumpt, dargestellt durch eine durchgezogene Linie. Der Schmiermittel-Versorgungskanal 46 besitzt eine Schmiermittel-Auslassöffnung 48, der bei Rotation des Pumpenrotors 16 wiederum zumindest vorübergehend fluidisch mit einem in Axialrichtung verlaufenden Schmiermittelkanal 50 in der Hohlzylinderfläche 26 verbunden ist. Die Gleitlageranordnung 28 wird auf diese Weise ausreichend mit Schmiermittel versorgt. The lubricant is thus from the lubricant pump 6 via the inlet opening 36 with the combined braid-filter unit 38 in a subsequent lubricant supply channel 46 of the lubricant supply assembly 30 pumped, represented by a solid line. The lubricant supply channel 46 has a lubricant outlet opening 48, which in turn is at least temporarily fluidly connected to an axially extending lubricant channel 50 in the hollow cylinder surface 26 when the pump rotor 16 rotates. The slide bearing assembly 28 is sufficiently supplied with lubricant in this way.
Dadurch, dass der Schmiermittelkanal 50 zum Pumpenraum 23 geöffnet und aufgeweitet Ist, wird Schmiermittel in den Pumpenraum geführt und schmiert auf bekannte Welse die Lauffläche 20 und gelangt über einen nicht dargestellten Auslass, dargestellt durch eine gestrichelte Linie, wieder zur Schmiermittelpumpe 6. Due to the fact that the lubricant channel 50 is opened and expanded to the pump chamber 23, lubricant is introduced into the pump chamber and lubricates the running surface 20 on known catfish and returns to the lubricant pump 6 via an outlet, not shown, represented by a dashed line.
Falls gewünscht kann auch die Kupplungs-Einheit 34 in die Schmiermittelversorgung einbezogen werden. Im Falle einer sogenannten trocken laufenden Vakuumpumpe kann beispielsweise auch ausschließlich eine Schmierung der Pumpenrotor-Lagermittel stattfinden. If desired, the coupling unit 34 may be included in the lubricant supply. In the case of a so-called dry-running vacuum pump, for example, only lubrication of the pump rotor bearing means can take place.

Claims

P A T E N T A N S P R Ü C H E PATENT APPLICATIONS
1. Kfz-Vakuumpumpe (2) mit einem Pumpengehäuse (10), das einen Pumpenraum (23) einschließt, in dem ein Pumpenrotor (16) mit mindestens einem verschieblich gelagerten Pumpenrotorflügel (18) drehbar über Lagermittel (28) gelagert ist, der direkt oder indirekt mittels einer Kupplungs-Einheit (34), die drehfest mit dem Pumpenrotor (16) verbunden ist, mit einer Antriebswelle verbindbar ist, wobei eine Schmiermittelversorgungsanordnung (30) zum Schmieren des Pumpenraumes (23) und/oder der Pumpenrotor- Lagermittel (28) und/oder der Kupplungs-Einhelt (34) vorgesehen ist, wobei die Schmiermittelversorgungsanordnung (30) zumindest einen stationären Schmiermittel-Versorgungskanal (46) in dem Pumpengehäuse (10) aufweist, durch den das Schmiermittel von einer Schmiermittel-Einlassöffnung (36) des Pumpengehäuses (10) in Richtung des Pumpenraumes (23) und/oder der Pumpenrotor- Lagermittel (28) und/oder der Kupplungs-Einheit (34) zu einer Schmiermittel-Auslassöffnung (48) pumpbar ist, wobei im Bereich der Schmiermittel-Einlassöffnung (36) ein Dichtungsorgan (45) und in der Schmiermittel-Einlassöffnung (36) ein Filterelement (40) vorgesehen sind, dadurch gekennzeichnet, dass das Dichtungsorgan (45) und das Filterelement (40) als kombinierte Dichtungs-Filter- Einheit (38) ausgebildet sind. A motor vehicle vacuum pump (2) having a pump housing (10) enclosing a pump space (23) in which a pump rotor (16) with at least one slidably mounted pump rotor blade (18) is rotatably supported by bearing means (28) directly or indirectly by means of a coupling unit (34) which is rotatably connected to the pump rotor (16) is connectable to a drive shaft, wherein a lubricant supply arrangement (30) for lubricating the pump chamber (23) and / or the pump rotor bearing means (28 ) and / or the Kupplungs Einhelt (34) is provided, wherein the lubricant supply assembly (30) at least one stationary lubricant supply channel (46) in the pump housing (10) through which the lubricant from a lubricant inlet port (36) of the Pump housing (10) in the direction of the pump chamber (23) and / or the pump rotor bearing means (28) and / or the coupling unit (34) is pumpable to a lubricant outlet opening (48), wherein i In the region of the lubricant inlet opening (36) a sealing member (45) and in the lubricant inlet opening (36) a filter element (40) are provided, characterized in that the sealing member (45) and the filter element (40) as a combined sealing Filter unit (38) are formed.
2. Kfz-Vakuumpumpe (2) nach Anspruch 1, dadurch gekennzeichnet, dass das Dichtungsorgan (45) auf einem Randorgan (42) des Filterelementes (40) angeordnet ist. 2. motor vehicle vacuum pump (2) according to claim 1, characterized in that the sealing member (45) on an edge member (42) of the filter element (40) is arranged.
3. Kfz-Vakuumpumpe (2) nach Anspruch 1, dadurch gekennzeichnet, dass das kombinierte Dichtungs-Filter-Einheit (38) einstückig ausgebildet ist. 3. motor vehicle vacuum pump (2) according to claim 1, characterized in that the combined sealing filter unit (38) is integrally formed.
4. Kfz-Vakuumpumpe (2) nach Anspruch 3, dadurch gekennzeichnet, dass das Dichtungsorgan (45) an das Filterelement (40) angespritzt ist. 4. motor vehicle vacuum pump (2) according to claim 3, characterized in that the sealing member (45) is injection-molded onto the filter element (40).
5. Kfz-Vakuumpumpe (2) nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass das Filterelement (40) eine Filterdüse (41) aufweist. 5. motor vehicle vacuum pump (2) according to one of the preceding claims, characterized in that the filter element (40) has a filter nozzle (41).
5. Kfz-Vakuumpumpe (2) nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass eine Pumpenrotor- Außenfläche (24) in einer Holzylinderfläche (26) des Pumpengehäuses (10) gelagert ist, wobei die Schmiermittelversorgungsanordnung (30) derart ausgeführt ist, dass die Schmiermittel-Auslassöffnung (48) zumindest vorübergehend fluidisch mit einem in Axialrichtung verlaufenden Schmiermittelkanal (50) in der Hohlzylinderfläche (26) verbunden ist. 5. A motor vehicle vacuum pump (2) according to any one of the preceding claims, characterized in that a pump rotor outer surface (24) in a wooden cylinder surface (26) of the pump housing (10) is mounted, wherein the lubricant supply arrangement (30) is designed such that the lubricant outlet opening (48) is at least temporarily fluidly connected to an axially extending lubricant channel (50) in the hollow cylinder surface (26).
6. Kfz-Vakuumpumpe (2) nach Anspruch 5, dadurch gekennzeichnet, dass der Schmlermittelkanai (50) zum Pumpenraum (23) geöffnet ist, derart, dass Schmiermittel In den Pumpenraum (23) überführbar ist. 6. motor vehicle vacuum pump (2) according to claim 5, characterized in that the Schmlermittelkanai (50) to the pump chamber (23) is opened, such that lubricant into the pump chamber (23) can be transferred.
7. Kfz-Vakuumpumpe (2) nach Anspruch 6, dadurch gekennzeichnet, dass der Schmiermittelkanal (50) sich zum Pumpenraum (23) hin aufweitet. 7. A motor vehicle vacuum pump (2) according to claim 6, characterized in that the lubricant channel (50) widens towards the pump chamber (23).
PCT/EP2016/066731 2016-07-14 2016-07-14 Motor vehicle vacuum pump WO2018010793A1 (en)

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US16/317,031 US20190226483A1 (en) 2016-07-14 2016-07-14 Motor vehicle vacuum pump
PCT/EP2016/066731 WO2018010793A1 (en) 2016-07-14 2016-07-14 Motor vehicle vacuum pump
EP16738786.9A EP3485167A1 (en) 2016-07-14 2016-07-14 Motor vehicle vacuum pump
CN201680087398.4A CN109416043B (en) 2016-07-14 2016-07-14 Vacuum pump for motor vehicle

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