EP3475573B1 - Motor vehicle vacuum pump arrangement - Google Patents

Motor vehicle vacuum pump arrangement Download PDF

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Publication number
EP3475573B1
EP3475573B1 EP16731591.0A EP16731591A EP3475573B1 EP 3475573 B1 EP3475573 B1 EP 3475573B1 EP 16731591 A EP16731591 A EP 16731591A EP 3475573 B1 EP3475573 B1 EP 3475573B1
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EP
European Patent Office
Prior art keywords
pump
arrangement
outlet
motor vehicle
rotor
Prior art date
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Active
Application number
EP16731591.0A
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German (de)
French (fr)
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EP3475573A1 (en
Inventor
Sebastian Cramer
Nabil Salim AL-HASAN
Daniel Müller
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Pierburg Pump Technology GmbH
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Pierburg Pump Technology GmbH
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Publication of EP3475573A1 publication Critical patent/EP3475573A1/en
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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
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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
    • 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
    • F04C29/06—Silencing
    • F04C29/065—Noise dampening volumes, e.g. muffler chambers
    • 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
    • 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
    • F04C2220/12—Dry running
    • 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
    • F04C2250/00—Geometry
    • F04C2250/20—Geometry of the rotor
    • 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

Definitions

  • the invention relates to an electric motor vehicle vacuum pump arrangement with a housing assembly with an inlet opening arrangement and an outlet opening arrangement, which has a pump unit and a drive motor, the pump unit comprising a pump rotor housing consisting of an end wall on the inlet and outlet sides and a pump rotor housing part arranged between them Include a pump rotor chamber, in which a pump rotor is provided, the drive motor having a motor rotor and a motor stator, sound-damping means being provided for noise reduction, the sound-damping means having at least two sound-damping chambers connected in series, the first sound-damping chamber being fluidly connected to the pump rotor chamber and via a first connection arrangement is fluidly connected to the second silencing space via a second connection arrangement and the second silencing space is fluidly connected to the outlet opening Connection arrangement is connected, wherein at least one sound absorbing means is provided in the form of a bore arrangement for the outlet opening arrangement.
  • An electrically driven vehicle vacuum pump generates a vacuum of, for example, absolutely 100 millibars, regardless of the operating state of an internal combustion engine, which is required, for example, to operate a pneumatic brake booster and / or other pneumatically operated auxiliary units.
  • the electrical power of the drive motor is typically in the range of 100 W with small vacuum pumps and with several 100 W with large vacuum pumps.
  • the noise emissions can be so considerable that extensive measures for sound absorption and / or sound shielding have to be carried out.
  • An example of this is in the WO 2014/135202 A1 described.
  • the construction of this electric vacuum pump is very complex due to the sound damping means used and requires a relatively large amount of space.
  • a generic vehicle vacuum pump arrangement is from the JP 2012-87701 A known. But here too the sound absorption is not sufficient for many applications due to the structure and arrangement.
  • the object of the invention is therefore to provide an electric motor vehicle vacuum pump arrangement with low noise emissions, which avoids the above-mentioned disadvantages in a simple and inexpensive manner.
  • the outlet opening arrangement is provided as a bore arrangement in the form of successive bore elements in the end wall on the outlet side, in the pump rotor housing part and in the end wall on the inlet side. It has been shown that such a simple measure can considerably reduce the noise emissions that occur. As a result, the vacuum pump requires less installation space and is less expensive to manufacture. Due to the special design of the outlet opening arrangement, existing housing parts can be used for the outlet opening and considerable sound absorption is ensured by the reflection properties of the bore arrangement.
  • the first sound absorption space is integrated in the end wall on the outlet side.
  • the first connection arrangement can consist of a first pump outlet with a non-return valve and a second pump outlet arranged offset, as seen in the direction of rotation of the pump rotor.
  • the first soundproofing space is advantageously produced by a cover element arranged on a side of the outlet-side end wall facing away from the pump rotor, the second connection arrangement being designed as a groove in the outlet-side end wall.
  • the composite housing has an end cover element which engages around the outlet-side end wall in such a way that a second soundproofing space is formed.
  • the sound absorption can be improved once again in that the bore element in the inlet-side end wall widens towards the outlet side.
  • the pump assembly is advantageously arranged coaxially with the drive motor, a rotor shaft of the drive rotor being mounted in the end wall on the inlet side via bearing means.
  • the inlet opening arrangement is provided in the end wall on the inlet side.
  • An electric motor vehicle vacuum pump arrangement 2 is shown, which is used in a motor vehicle to provide vacuum with an absolute pressure of, for example, 100 mbar and lower.
  • the vacuum is mainly used as potential energy for actuators, for example for a pneumatic brake booster or other pneumatic automotive actuators.
  • An electric drive for motor vehicle vacuum pumps is becoming increasingly necessary because the motor vehicle internal combustion engine does not run continuously during vehicle operation.
  • the motor vehicle vacuum pump arrangement 2 essentially consists of a housing assembly 4 which has a drive motor 6 and a pump unit 8.
  • the drive motor 6 is provided in a pot-shaped motor housing 10 and has a drive rotor 12 in a known manner (see here Figure 2 ) and a drive motor stator, not shown.
  • the pump unit 8 has a pump rotor housing 14, which consists of an end wall 16, 18 on the inlet and outlet sides and a pump rotor housing part 20 arranged between them (see also in particular here Figure 2 ).
  • the housing assembly 4 also has an end cover element 22 which engages around the outlet-side end wall 18 and the pump rotor housing part 20 and engages in a form-fitting manner on the inlet-side end wall 16.
  • the rotor housing 14 with the end cover element 22 is connected to the cup-shaped drive motor housing 10 via a first flange element 24.
  • the first flange part 24 in turn connects, with the interposition of damping body 26, to a second flange part 28, via which the motor vehicle vacuum pump arrangement 2 can be connected to a body component of a motor vehicle.
  • the Figure 1 furthermore shows an inlet opening arrangement 30 in the form of a plastic tube element which is provided in the end wall 16 on the inlet side and through which air to be discharged from a motor vehicle actuator is to be guided into the pump unit 8.
  • 32 designates the outlet opening arrangement from which the air compressed by the pump assembly 8 is discharged into the environment,
  • FIG. 2 now shows a sectional view of the pump assembly 8 and a part of the drive motor 6.
  • the drive motor 6 has a drive rotor 12 which is non-rotatably fastened on a drive rotor shaft 34, the drive rotor shaft 34 simultaneously as a rotor shaft for one in a pump rotor chamber 35 of the pump rotor housing 14 provided pump rotor 36 is used.
  • the drive rotor shaft 34 is in this case mounted in the end wall 16 on the inlet side via a bearing means 38 designed as a roller bearing.
  • 40 denotes an electrical connection cable for supplying power to the drive motor 6.
  • the pump rotor 36 which is sucked in through the inlet opening arrangement 30 and in the rotor space 35 by the vane cell rotor compressed air is expelled from the rotor space 35 through a first connection arrangement 42.
  • the first connection arrangement 42 in this case consists in a known manner of a first pump outlet 44, which has a check valve 46 to reduce noise, and of a second pump outlet 48, which is arranged offset in the direction of rotation of the pump rotor 36. Via this first connection arrangement 42, the compressed air reaches a first sound absorption space 50, which is integrated in the end wall 18 on the outlet side.
  • the first soundproofing space 50 has a cover element 52 on the side of the outlet-side end wall 18 facing away from the pump rotor 36.
  • This cover element 52 also produces the second connection arrangement 54, which is essentially designed as a groove 56 in the outlet-side end wall 18.
  • the compressed air which is damped in a first sound damping space 50, is transferred into a second sound damping space 58.
  • This soundproofing space 58 is essentially produced by the end cover element 22 encompassing the outlet-side end wall 18 in a fluid-tight manner.
  • the compressed air is then released to the environment via the outlet opening arrangement 32 designed as a bore arrangement 60.
  • the bore arrangement 60 is constructed from successive bore elements 62, 64 and 66.
  • the bore element 62 is provided in the outlet-side end wall 18, the bore element 64 in the pump rotor housing part 20 and the bore element 66 in the inlet-side end wall 16. Due to the fact that the bore arrangement 60 forms an elongated tubular element in this way, an additional damping of the airborne sound can be achieved.
  • the bore element 66 is also widened in the direction of the outlet side, as a result of which the sound is reduced again due to a change in pressure.
  • connection arrangement 54 can also be designed additionally or solely as a bore arrangement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Description

Die Erfindung betrifft eine elektrische KFZ-Vakuumpumpen-Anordnung mit einem Gehäuseverbund mit einer Einlassöffnungsanordnung und einer Auslassöffnungsanordnung, der ein Pumpenaggregat und einen Antriebsmotor aufweist, wobei das Pumpenaggregat ein Pumpenrotorgehäuse bestehend aus einer einlass- und auslassseitigen Stirnwand und einem dazwischen angeordneten Pumpenrotorgehäuseteil aufweist, die einen Pumpenrotorraum einschließen, in dem ein Pumpenrotor vorgesehen ist, wobei der Antriebsmotor einen Motorrotor und einen Motorstator aufweist, wobei Schalldämpfungsmittel zur Geräuschreduzierung vorgesehen sind, wobei die Schalldämpfungsmittel mindestens zwei hintereinander geschaltete Schalldämpfungsräume aufweisen, wobei der erste Schalldämpfungsraum über eine erste Verbindungsanordnung fluidisch mit dem Pumpenrotorraum und über eine zweite Verbindungsanordnung fluidisch mit dem zweiten Schalldämpfungsraum verbunden ist und wobei der zweite Schalldämpfungsraum fluidisch mit der Auslassöffnungsanordnung verbunden ist, wobei mindestens ein Schalldämpfungsmittel in Form einer Bohrungsanordnung für die Auslassöffnungsanordnung vorgesehen ist.The invention relates to an electric motor vehicle vacuum pump arrangement with a housing assembly with an inlet opening arrangement and an outlet opening arrangement, which has a pump unit and a drive motor, the pump unit comprising a pump rotor housing consisting of an end wall on the inlet and outlet sides and a pump rotor housing part arranged between them Include a pump rotor chamber, in which a pump rotor is provided, the drive motor having a motor rotor and a motor stator, sound-damping means being provided for noise reduction, the sound-damping means having at least two sound-damping chambers connected in series, the first sound-damping chamber being fluidly connected to the pump rotor chamber and via a first connection arrangement is fluidly connected to the second silencing space via a second connection arrangement and the second silencing space is fluidly connected to the outlet opening Connection arrangement is connected, wherein at least one sound absorbing means is provided in the form of a bore arrangement for the outlet opening arrangement.

Eine elektrisch angetriebene KFZ-Vakuumpumpe generiert in einem Kraftfahrzeug (KFZ) unabhängig von dem Betriebszustand eines Verbrennungsmotors einen Unterdruck von beispielsweise absolut 100 Millibar, der beispielsweise zum Betrieb eines pneumatischen Bremskraftverstärkers und/oder anderer pneumatisch betriebener Nebenaggregate benötigt wird. Bei einer elektrischen KFZ-Vakuumpumpen-Anordnung liegt die elektrische Leistung des Antriebsmotors typischerweise im Bereich von 100 W bei kleinen Vakuumpumpen und bei mehreren 100 W bei großen Vakuumpumpen. Je nach Pumpleistung und Drehzahl des Pumpaggregats können die Schallemissionen so erheblich sein, dass umfangreiche Maßnahmen zur Schalldämpfung und/oder zur Schallabschirmung vorgenommen werden müssen. Ein Beispiel hierfür ist in der WO 2014/135202 A1 beschrieben. Der Aufbau dieser elektrischen Vakuumpumpe ist jedoch aufgrund der eingesetzten Schalldämpfungsmittel sehr aufwendig und bedingt einen relativ großen Bauraum.An electrically driven vehicle vacuum pump generates a vacuum of, for example, absolutely 100 millibars, regardless of the operating state of an internal combustion engine, which is required, for example, to operate a pneumatic brake booster and / or other pneumatically operated auxiliary units. In an electrical automotive vacuum pump arrangement, the electrical power of the drive motor is typically in the range of 100 W with small vacuum pumps and with several 100 W with large vacuum pumps. Depending on the pump output and speed of the pump unit, the noise emissions can be so considerable that extensive measures for sound absorption and / or sound shielding have to be carried out. An example of this is in the WO 2014/135202 A1 described. However, the construction of this electric vacuum pump is very complex due to the sound damping means used and requires a relatively large amount of space.

Eine gattungsgemäße KFZ-Vakuumpumpen-Anordnung ist aus der JP 2012-87701 A bekannt. Aber auch hier ist die Schalldämpfung aufgrund des Aufbaus und der Anordnung für viele Anwendungen nicht ausreichend.A generic vehicle vacuum pump arrangement is from the JP 2012-87701 A known. But here too the sound absorption is not sufficient for many applications due to the structure and arrangement.

Aufgabe der Erfindung ist es daher, eine elektrische KFZ-Vakuumpumpen-Anordnung mit geringen Schallemissionen zu schaffen, die die obengenannten Nachteile auf einfache und kostengünstige Art und Weise vermeidet.The object of the invention is therefore to provide an electric motor vehicle vacuum pump arrangement with low noise emissions, which avoids the above-mentioned disadvantages in a simple and inexpensive manner.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Auslassöffnungsanordnung als Bohrungsanordnung in Form von aufeinander folgenden Bohrungselementen in der auslassseitigen Stirnwand, in dem Pumpenrotorgehäuseteil und in der einlassseitigen Stirnwand vorgesehen ist. Es hat sich erwiesen, dass durch eine derartig einfache Maßnahme die auftretenden Schallemissionen erheblich verringert werden können. Die Vakuumpumpe benötigt hierdurch einen geringeren Bauraum und ist kostengünstiger herstellbar. Durch die besondere Ausgestaltung der Auslassöffnungsanordnung können bestehende Gehäuseteile für die Auslassöffnung genutzt werden und es wird eine erhebliche Schalldämpfung durch die Reflektionseigenschaften der Bohrungsanordnung gewährleistet.This object is achieved according to the invention in that the outlet opening arrangement is provided as a bore arrangement in the form of successive bore elements in the end wall on the outlet side, in the pump rotor housing part and in the end wall on the inlet side. It has been shown that such a simple measure can considerably reduce the noise emissions that occur. As a result, the vacuum pump requires less installation space and is less expensive to manufacture. Due to the special design of the outlet opening arrangement, existing housing parts can be used for the outlet opening and considerable sound absorption is ensured by the reflection properties of the bore arrangement.

In einer besonders vorteilhaften Ausführungsform ist der erste Schalldämpfungsraum in der auslassseitigen Stirnwand integriert. Des Weiteren kann die erste Verbindungsanordnung aus einem ersten Pumpenauslass mit einem Rückschlagventil und einem zweiten, in Drehrichtung des Pumpenrotors gesehen, versetzt angeordneten Pumpenauslass bestehen.In a particularly advantageous embodiment, the first sound absorption space is integrated in the end wall on the outlet side. Furthermore, the first connection arrangement can consist of a first pump outlet with a non-return valve and a second pump outlet arranged offset, as seen in the direction of rotation of the pump rotor.

In vorteilhafter Weise wird der erste Schalldämpfungsraum durch ein auf eine vom Pumpenrotor abgewandte Seite der auslassseitigen Stirnwand angeordnetes Deckelelement hergestellt, wobei die zweite Verbindunganordnung als Nut in der auslassseitigen Stirnwand ausgeführt ist.The first soundproofing space is advantageously produced by a cover element arranged on a side of the outlet-side end wall facing away from the pump rotor, the second connection arrangement being designed as a groove in the outlet-side end wall.

In einer besonders vorteilhaften, Bauraum-freundlichen Ausführungsform weist der Gehäuseverbund ein Abschlussdeckelelement auf, das die auslassseitige Stirnwand derart umgreift, dass ein zweiter Schalldämpfungsraum ausgebildet ist.In a particularly advantageous embodiment which is space-friendly, the composite housing has an end cover element which engages around the outlet-side end wall in such a way that a second soundproofing space is formed.

Die Schalldämpfung kann noch einmal dadurch verbessert werden, dass sich das Bohrungselement in der einlassseitigen Stirnwand zur Auslassseite hin gerichtet aufweitet.The sound absorption can be improved once again in that the bore element in the inlet-side end wall widens towards the outlet side.

In vorteilhafter Weise ist das Pumpenaggregat koaxial zu dem Antriebsmotor angeordnet, wobei eine Rotorwelle des Antriebsrotors in der einlassseitigen Stirnwand über Lagermittel gelagert ist.The pump assembly is advantageously arranged coaxially with the drive motor, a rotor shaft of the drive rotor being mounted in the end wall on the inlet side via bearing means.

Darüber hinaus ist es bauraumgünstig, wenn die Einlassöffnungsanordnung in der einlassseitigen Stirnwand vorgesehen ist.In addition, it is space-saving if the inlet opening arrangement is provided in the end wall on the inlet side.

Grundsätzlich sind alle Typen rotatorischer Pumpaggregate geeignet. Besonders bevorzugt ist als Pumpaggregat ein Flügelzellen-Pumpaggregat. Die Erfindung wird nachfolgend anhand einer Zeichnung näher erläutert, hierbei zeigt:

  • Figur 1 eine perspektivische Ansicht einer erfindungsgemäßen elektrischen KFZ-Vakuumpumpen-Anordnung, und
  • Figur 2 eine Schnittansicht eines Pumpenaggregates und eines Teils des Antriebsmotors der KFZ-Vakuumpumpen-Anordnung aus Figur 1.
Basically, all types of rotary pump units are suitable. A vane pump unit is particularly preferred as the pump unit. The invention is explained in more detail below with reference to a drawing, which shows:
  • Figure 1 a perspective view of an electric automotive vacuum pump arrangement according to the invention, and
  • Figure 2 a sectional view of a pump unit and part of the drive motor of the automotive vacuum pump arrangement Figure 1 .

In den Figuren 1 und 2 ist eine elektrische KFZ-Vakuumpumpen-Anordnung 2 dargestellt, die in einem Kraftfahrzeug der Bereitstellung von Vakuum mit einem absoluten Druck von beispielsweise 100 mbar und niedriger dient. Das Vakuum wird hauptsächlich als potentielle Energie für Aktuatorik genutzt, beispielsweise für einen pneumatischen Bremskraftverstärker oder andere pneumatische KFZ-Aktuatoren. Ein elektrischer Antrieb für KFZ-Vakuumpumpen wird in zunehmendem Maße erforderlich, weil der KFZ-Verbrennungsmotor während des Fahrzeug-Betriebes nicht ständig läuft.In the Figures 1 and 2nd An electric motor vehicle vacuum pump arrangement 2 is shown, which is used in a motor vehicle to provide vacuum with an absolute pressure of, for example, 100 mbar and lower. The vacuum is mainly used as potential energy for actuators, for example for a pneumatic brake booster or other pneumatic automotive actuators. An electric drive for motor vehicle vacuum pumps is becoming increasingly necessary because the motor vehicle internal combustion engine does not run continuously during vehicle operation.

Die KFZ-Vakuumpumpen-Anordnung 2 besteht im Wesentlichen aus einem Gehäuseverbund 4, der einen Antriebsmotor 6 und ein Pumpenaggregat 8 aufweist. Der Antriebsmotor 6 ist hierbei in einem topfförmigen Motorgehäuse 10 vorgesehen und weist auf bekannte Weise einen Antriebsrotor 12 (siehe hierzu Figur 2) und einen nicht weiter dargestellten Antriebsmotorstator auf. Das Pumpenaggregat 8 weist ein Pumpenrotorgehäuse 14 auf, das aus einer einlass- und auslassseitigen Stirnwand 16, 18 und einem dazwischen angeordneten Pumpenrotorgehäuseteil 20 besteht (siehe auch hier insbesondere Figur 2). Der Gehäuseverbund 4 besitzt des Weiteren ein Abschlussdeckelelement 22, das die auslassseitige Stirnwand 18 und das Pumpenrotorgehäuseteil 20 umgreift und auf die einlassseitige Stirnwand 16 formschlüssig angreift. Das Rotorgehäuse 14 mit dem Abschlussdeckelelement 22 ist über ein erstes Flanschelement 24 mit dem topfförmigen Antriebsmotorgehäuse 10 verbunden. Das erste Flanschteil 24 schließt wiederum unter Zwischenschaltung von Dämpfungskörper 26 auf ein zweites Flanschteil 28 an, über das die KFZ-Vakuumpumpen-Anordnung 2 mit einem Karosseriebauteil eines Kraftfahrzeuges verbunden werden kann.The motor vehicle vacuum pump arrangement 2 essentially consists of a housing assembly 4 which has a drive motor 6 and a pump unit 8. The drive motor 6 is provided in a pot-shaped motor housing 10 and has a drive rotor 12 in a known manner (see here Figure 2 ) and a drive motor stator, not shown. The pump unit 8 has a pump rotor housing 14, which consists of an end wall 16, 18 on the inlet and outlet sides and a pump rotor housing part 20 arranged between them (see also in particular here Figure 2 ). The housing assembly 4 also has an end cover element 22 which engages around the outlet-side end wall 18 and the pump rotor housing part 20 and engages in a form-fitting manner on the inlet-side end wall 16. The rotor housing 14 with the end cover element 22 is connected to the cup-shaped drive motor housing 10 via a first flange element 24. The first flange part 24 in turn connects, with the interposition of damping body 26, to a second flange part 28, via which the motor vehicle vacuum pump arrangement 2 can be connected to a body component of a motor vehicle.

Die Figur 1 zeigt des Weiteren eine Einlassöffnungsanordnung 30 in Form eines Kunststoffrohrelementes, das in der einlassseitigen Stirnwand 16 vorgesehen ist und durch die aus einem KFZ-Aktuator abzuleitende Luft in das Pumpenaggregat 8 zu führen ist. Mit 32 ist die Auslassöffnungsanordnung bezeichnet, aus der die vom Pumpenaggregat 8 komprimierte Luft in die Umgebung abgeführt wird,The Figure 1 furthermore shows an inlet opening arrangement 30 in the form of a plastic tube element which is provided in the end wall 16 on the inlet side and through which air to be discharged from a motor vehicle actuator is to be guided into the pump unit 8. 32 designates the outlet opening arrangement from which the air compressed by the pump assembly 8 is discharged into the environment,

Figur 2 zeigt nun eine Schnittansicht des Pumpenaggregats 8 sowie eines Teils des Antriebsmotors 6. Wie bereits oben angedeutet, weist der Antriebsmotor 6 einen Antriebsrotor 12 auf, der drehfest auf einer Antriebsrotorwelle 34 befestigt ist, wobei die Antriebsrotorwelle 34 gleichzeitig als Rotorwelle für einen in einem Pumpenrotorraum 35 des Pumpenrotorgehäuses 14 vorgesehenen Pumpenrotor 36 dient. Die Antriebsrotorwelle 34 ist hierbei über ein als Wälzlager ausgebildetes Lagermittel 38 in der einlassseitigen Stirnwand 16 gelagert. Figure 2 now shows a sectional view of the pump assembly 8 and a part of the drive motor 6. As already indicated above, the drive motor 6 has a drive rotor 12 which is non-rotatably fastened on a drive rotor shaft 34, the drive rotor shaft 34 simultaneously as a rotor shaft for one in a pump rotor chamber 35 of the pump rotor housing 14 provided pump rotor 36 is used. The drive rotor shaft 34 is in this case mounted in the end wall 16 on the inlet side via a bearing means 38 designed as a roller bearing.

Der guten Ordnung halber sei festgehalten, dass mit 40 ein elektrisches Verbindungskabel bezeichnet ist zur Stromversorgung des Antriebsmotors 6. Die durch die Einlassöffnungsanordnung 30 angesaugte und im Rotorraum 35 durch den als Flügelzellenrotor ausgebildete Pumpenrotor 36 komprimierte Luft wird durch eine erste Verbindungsanordnung 42 aus dem Rotorraum 35 ausgestoßen. Die erste Verbindungsanordnung 42 besteht hierbei auf bekannte Weise aus einem ersten Pumpenauslass 44, der zur Geräuschreduzierung ein Rückschlagventil 46 besitzt und aus einem zweiten Pumpenauslass 48, der in Drehrichtung des Pumpenrotors 36 versetzt angeordnet ist. Über diese erste Verbindungsanordnung 42 gelangt die komprimierte Luft in einen ersten Schalldämpfungsraum 50, der in der auslassseitigen Stirnwand 18 integriert ist. Hierzu weist der erste Schalldämpfungsraum 50 auf der vom Pumpenrotor 36 abgewandten Seite der auslassseitigen Stirnwand 18 ein Deckelelement 52 auf. Durch dieses Deckelelement 52 wird auch die zweite Verbindungsanordnung 54 hergestellt, die im Wesentlichen als Nut 56 in der auslassseitigen Stirnwand 18 ausgeführt ist. Über diese zweite Verbindungsanordnung 54 wird die komprimierte, in einem ersten Schalldämpfungsraum 50 gedämpfte Luft in einen zweiten Schalldämpfungsraum 58 überführt. Dieser Schalldämpfungsraum 58 wird im Wesentlichen dadurch hergestellt, dass das Abschlussdeckelelement 22 die auslassseitige Stirnwand 18 fluiddicht umgreift. Die komprimierte Luft wird dann über die als Bohrungsanordnung 60 ausgebildete Auslassöffnungsanordnung 32 an die Umgebung abgegeben. Die Bohrungsanordnung 60 ist hierbei aus aufeinander folgenden Bohrungselementen 62, 64 und 66 aufgebaut. Das Bohrungselement 62 ist in der auslassseitigen Stirnwand 18, das Bohrungselement 64 im Pumpenrotorgehäuseteil 20 und das Bohrungselement 66 in der einlassseitigen Stirnwand 16 vorgesehen. Dadurch, dass die Bohrungsanordnung 60 auf diese Weise ein langgestrecktes Rohrelement ausformt, kann noch einmal eine zusätzliche Dämpfung des Luftschalles erreicht werden. Das Bohrungselement 66 ist darüber hinaus zur Auslassseite hin gerichtet aufgeweitet, wodurch aufgrund einer Druckänderung eine nochmalige Schallreduzierung vorgenommen wird.For the sake of good order, it should be noted that 40 denotes an electrical connection cable for supplying power to the drive motor 6. The pump rotor 36, which is sucked in through the inlet opening arrangement 30 and in the rotor space 35 by the vane cell rotor compressed air is expelled from the rotor space 35 through a first connection arrangement 42. The first connection arrangement 42 in this case consists in a known manner of a first pump outlet 44, which has a check valve 46 to reduce noise, and of a second pump outlet 48, which is arranged offset in the direction of rotation of the pump rotor 36. Via this first connection arrangement 42, the compressed air reaches a first sound absorption space 50, which is integrated in the end wall 18 on the outlet side. For this purpose, the first soundproofing space 50 has a cover element 52 on the side of the outlet-side end wall 18 facing away from the pump rotor 36. This cover element 52 also produces the second connection arrangement 54, which is essentially designed as a groove 56 in the outlet-side end wall 18. Via this second connection arrangement 54, the compressed air, which is damped in a first sound damping space 50, is transferred into a second sound damping space 58. This soundproofing space 58 is essentially produced by the end cover element 22 encompassing the outlet-side end wall 18 in a fluid-tight manner. The compressed air is then released to the environment via the outlet opening arrangement 32 designed as a bore arrangement 60. The bore arrangement 60 is constructed from successive bore elements 62, 64 and 66. The bore element 62 is provided in the outlet-side end wall 18, the bore element 64 in the pump rotor housing part 20 and the bore element 66 in the inlet-side end wall 16. Due to the fact that the bore arrangement 60 forms an elongated tubular element in this way, an additional damping of the airborne sound can be achieved. The bore element 66 is also widened in the direction of the outlet side, as a result of which the sound is reduced again due to a change in pressure.

Es sollte deutlich sein, dass je nach Bauform der elektrischen KFZ-Vakuumpumpen-Anordnung 2 auch die zweite Verbindungsanordnung 54 zusätzlich oder alleinig als Bohrungsanordnung ausgebildet sein kann.It should be clear that, depending on the design of the electrical motor vehicle vacuum pump arrangement 2, the second connection arrangement 54 can also be designed additionally or solely as a bore arrangement.

Claims (9)

  1. An electrical motor vehicle vacuum pump arrangement comprising
    a housing assembly (4) with an inlet opening arrangement (30) and an outlet opening arrangement (32), which housing assembly has a pump apparatus (8) and a drive motor (6), wherein said pump apparatus (8) has a pump rotor housing (14) composed of an inlet-side and an outlet-side face wall (16, 18) and of a pump rotor housing part (20) arranged therebetween, which enclose a pump rotor chamber (35) in which a pump rotor (36) is provided, wherein said drive motor (6) has a motor rotor (12) and a motor stator, wherein sound damping means (50, 58, 60) for noise reduction are provided, wherein said sound damping means (50, 58, 60) have at least two sound damping chambers (50, 58) connected in series, wherein said first sound damping chamber (50) is fluidically connected to said pump rotor chamber (35) via a first connecting arrangement (42) and is fluidically connected to said second sound damping chamber (58) via a second connecting arrangement (54), and wherein said second sound damping chamber (58) is fluidically connected to said outlet opening arrangement (32), wherein at least one sound damping means in the form of a bore arrangement (60) is provided for said outlet opening arrangement (32),
    characterized in that
    the outlet opening arrangement (32) is provided as a bore arrangement (60) in the form of successive bore elements (62, 64, 66) in the outlet-side face wall (18), in the pump rotor housing part (20) and in the inlet-side face wall (16).
  2. The electrical motor vehicle vacuum pump arrangement according to claim 1, characterized in that the first sound damping chamber (50) is integrated in the outlet-side face wall (18).
  3. The electrical motor vehicle vacuum pump arrangement according to claim 2, characterized in that the first connecting arrangement (42) is composed of a first pump outlet (44) having a check valve (46) and a second pump outlet (48) which is staggered as seen in the direction of rotation of the pump rotor (36).
  4. The electrical motor vehicle vacuum pump arrangement according to any one of the preceding claims, characterized in that the first sound damping chamber (50) is created by a cover element (52) arranged on the side of the outlet-side face wall (18) facing away from the pump rotor (36), wherein the second connecting arrangement (54) is configured as a groove (56) in said outlet-side face wall (18).
  5. The electrical motor vehicle vacuum pump arrangement according to any one of the preceding claims, characterized in that the housing assembly (4) comprises an end cover element (22) which encompasses the outlet-side face wall (18) such that a second sound damping chamber (58) is defined.
  6. The electrical motor vehicle vacuum pump arrangement according to any one of the preceding claims, characterized in that the bore element (66) in the inlet-side face wall (16) is flared towards the outlet side.
  7. The electrical motor vehicle vacuum pump arrangement according to any one of the preceding claims, characterized in that the pump apparatus (8) is arranged coaxially to the drive motor (6), wherein a rotor shaft (34) of the drive rotor (12) is supported in the inlet-side face wall (16) via bearing means (38).
  8. The electrical motor vehicle vacuum pump arrangement according to any one of the preceding claims, characterized in that the inlet opening arrangement (30) is provided in the inlet-side face wall (16).
  9. The electrical motor vehicle vacuum pump arrangement according to any one of the preceding claims, characterized in that the pump apparatus (8) is a vane-type pump apparatus.
EP16731591.0A 2016-06-22 2016-06-22 Motor vehicle vacuum pump arrangement Active EP3475573B1 (en)

Applications Claiming Priority (1)

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PCT/EP2016/064429 WO2017220141A1 (en) 2016-06-22 2016-06-22 Motor vehicle vacuum pump arrangement

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EP3475573A1 EP3475573A1 (en) 2019-05-01
EP3475573B1 true EP3475573B1 (en) 2020-08-05

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EP17713583.7A Active EP3475574B1 (en) 2016-06-22 2017-02-01 Dry-running vane gas pump

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JP (1) JP2019518905A (en)
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JP2019518905A (en) 2019-07-04
WO2017220141A1 (en) 2017-12-28
CN109154294A (en) 2019-01-04
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US11261869B2 (en) 2022-03-01
US10995757B2 (en) 2021-05-04
EP3475574A1 (en) 2019-05-01
EP3475573A1 (en) 2019-05-01
CN109154293A (en) 2019-01-04
CN109154294B (en) 2019-12-31
CN109154293B (en) 2021-04-13
US20190323506A1 (en) 2019-10-24
US20200309134A1 (en) 2020-10-01
WO2017220212A1 (en) 2017-12-28

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