EP1948938B1 - Pump with a cylindrical cooling bush - Google Patents

Pump with a cylindrical cooling bush Download PDF

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Publication number
EP1948938B1
EP1948938B1 EP06805452A EP06805452A EP1948938B1 EP 1948938 B1 EP1948938 B1 EP 1948938B1 EP 06805452 A EP06805452 A EP 06805452A EP 06805452 A EP06805452 A EP 06805452A EP 1948938 B1 EP1948938 B1 EP 1948938B1
Authority
EP
European Patent Office
Prior art keywords
pump
housing
pump according
rotor
insert sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP06805452A
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German (de)
French (fr)
Other versions
EP1948938A1 (en
Inventor
Ulrich Hiltemann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Magna Powertrain Hueckeswagen GmbH
Original Assignee
Ixetic Hueckeswagen GmbH
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Application filed by Ixetic Hueckeswagen GmbH filed Critical Ixetic Hueckeswagen GmbH
Publication of EP1948938A1 publication Critical patent/EP1948938A1/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
    • F04C29/04—Heating; Cooling; Heat insulation
    • 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

Definitions

  • the invention relates to a pump, in particular vane pump for vacuum for brake booster in motor vehicles or for sucking blow-by gas from the crankcase of internal combustion engines, with a housing, with a rotor and at least one wing and a liquid cooling device.
  • a pump is for example off JP 3-258989 and US 3,374,943 known.
  • a pump in particular vane pump for vacuum for brake booster in motor vehicles or for sucking blow-by gas from the crankcase of internal combustion engines, with a housing, with a rotor, with at least one wing and a liquid cooling device, said the cooling device is represented by means of a simple, substantially cylindrical insert sleeve by insertion inside the housing.
  • the insert sleeve is both a bushing for the wing and the rotor and one of the walls of the cooling device.
  • a pump is preferred in which the insert sleeve has on its outer circumferential surface a helical groove which forms a cooling channel with the inner lateral surface of the housing.
  • a pump in which the housing is represented by a flange part, a substantially tubular intermediate part and a end cover part. This has the advantage that a simple construction of the cooling device by two pipe parts, namely that of the housing and the insert sleeve, can be produced.
  • a pump according to the invention is characterized in that the insert bush is made of plastic. This has the advantage that the screw-shaped cooling channels arranged on the outside of the bushing can already be produced by the plastic injection process.
  • a pump is preferred in which the wing made of plastic, optionally with caps made of a low-wear, low-friction plastic. Furthermore, a pump is preferred in which the rotor is made of plastic.
  • FIG. 1 the individual parts of the housing and the bush-shaped insert of the cooling device are shown.
  • An approximately cylindrical or pot-shaped housing 1 which is made of a metallic material such as aluminum die cast, has a smooth, cylindrical inner surface 3.
  • the housing 1 can just as well be made of an iron sheet material, for example by a deep drawing process, or by a plastic material.
  • the housing 1 further has a flange side with mounting eyes 5 and can be flanged with this side of a wet-running vacuum pump according to the prior art, for example using screws 7.
  • an insert sleeve 9 is inserted, which on its cylindrical Outside surface has helical grooves 11.
  • the insert bush 9 is preferably made of a high-quality, wear-resistant material with good sliding properties, since in the socket 9, the wing with its end caps sealingly slides along the inner wall of the bushing 9 along.
  • a high-quality plastic is selected for the insert bushing 9, which is both wear-resistant and has good sliding properties and also can seal well against the inner wall 3 of the housing 1 by its certain elasticity to metallic materials.
  • FIG. 2 the pump according to the invention is shown in combination with a so-called wet-running vacuum pump. Same parts are here with the same reference numerals as in FIG. 1 Mistake.
  • the housing 1 with the inner wall 3 in soft the insert sleeve 9 is inserted with its helical grooves 11.
  • the insert bush 9 seals with its surface 13 against the housing 1 with the inner surface 3 from.
  • Housing 1 and insert bushing 9 are laterally sealed by the lid 15.
  • seals 19 and 21 are respectively arranged between the cover 15, the housing 1 and the insert bush 9.
  • the liquid-cooled vacuum pump is closed on the other side by a flange 23, which has seals 25 to the housing 1 and seals 27 to the insert bushing out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
  • Non-Positive Displacement Air Blowers (AREA)
  • Compressor (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

A pump, particularly to a vane-cell pump for a vacuum for brake boosters in motor vehicles or for drawing blow-by gas out of the crankcase of internal combustion engines, with a casing, a rotor and with at least one vane and a liquid cooling device, which is depicted by a simple, essentially cylindrical insertion bush for inserting inside the casing.

Description

Die Erfindung betrifft eine Pumpe, insbesondere Flügelzellenpumpe für Vakuum für Bremskraftverstärker in Kraftfahrzeugen oder zum Absaugen von Blow-by-Gas aus dem Kurbelgehäuse von Verbrennungsmotoren, mit einem Gehäuse, mit einem Rotor und mindestens einem Flügel und einer Flüssigkeitskühleinrichtung. Eine solche Pumpe ist beispielsweise aus JP 3-258989 und US 3 374 943 bekannt.The invention relates to a pump, in particular vane pump for vacuum for brake booster in motor vehicles or for sucking blow-by gas from the crankcase of internal combustion engines, with a housing, with a rotor and at least one wing and a liquid cooling device. Such a pump is for example off JP 3-258989 and US 3,374,943 known.

Direkt vom Verbrennungsmotor angetriebene Vakuumpumpen werden nach dem Stand der Technik als nasslaufende Pumpen betrieben. Es wird Motoröl zum Schmieren, Dichten und Kühlen eingesetzt. Würden trockenlaufende Pumpen eingesetzt, besteht das Problem, die gerade bei hohen Drehzahlen entstehende Wärme aus Reibung und Verdichtung abzuführen.Vacuum pumps driven directly by the internal combustion engine are operated according to the prior art as wet-running pumps. Engine oil is used for lubrication, sealing and cooling. If dry-running pumps were used, there is the problem of dissipating the heat arising from friction and compression, especially at high speeds.

Weiterhin sind im Stand der Technik Pumpen, beispielsweise so genannte Scroll- Kompressoren bekannt, welche aufwendige Kühleinrichtungen am Gehäuse aufweisen, die ein großes Bauvolumen erfordern.Furthermore, in the prior art pumps, for example so-called scroll compressors are known, which have complex cooling means on the housing, which require a large volume of construction.

Es ist daher Aufgabe der Erfindung, eine Pumpe darzustellen, die diese Probleme nicht aufweist.It is therefore an object of the invention to present a pump that does not have these problems.

Die Aufgabe wird gelöst durch eine Pumpe, insbesondere Flügelzellenpumpe für Vakuum für Bremskraftverstärker in Kraftfahrzeugen oder zum Absaugen von Blow-by-Gas aus dem Kurbelgehäuse von Verbrennungsmotoren, mit einem Gehäuse, mit einem Rotor, mit mindestens einem Flügel und einer Flüssigkeits-Kühleinrichtung, wobei die Kühleinrichtung mittels einer einfachen, im Wesentlichen zylindrischen Einsatzbuchse durch Einsetzen innerhalb des Gehäuses dargestellt wird. Bevorzugt wird eine Pumpe, bei welcher die Einsatzbuchse sowohl eine Laufbuchse für den Flügel und den Rotor als auch eine der Wandungen der Kühleinrichtung darstellt.The object is achieved by a pump, in particular vane pump for vacuum for brake booster in motor vehicles or for sucking blow-by gas from the crankcase of internal combustion engines, with a housing, with a rotor, with at least one wing and a liquid cooling device, said the cooling device is represented by means of a simple, substantially cylindrical insert sleeve by insertion inside the housing. Preferred is a pump in which the insert sleeve is both a bushing for the wing and the rotor and one of the walls of the cooling device.

Weiterhin wird eine Pumpe bevorzugt, bei welcher die Einsatzbuchse an ihrer Außenmantelfläche eine schraubenförmige Nut aufweist, welche mit der Innenmantelfläche des Gehäuses einen Kühlkanal ausbildet. Das hat den Vorteil, dass die Kühlkanäle durch eine einfache Außenbearbeitung der Buchse herstellbar sind, während die glatte Innenmantelfläche keiner Bearbeitung bedarf.Furthermore, a pump is preferred in which the insert sleeve has on its outer circumferential surface a helical groove which forms a cooling channel with the inner lateral surface of the housing. This has the advantage that the cooling channels can be produced by a simple external machining of the bush, while the smooth inner circumferential surface requires no processing.

Eine erfindungsgemäße Pumpe zeichnet sich dadurch aus, dass die Einsatzbuchse einstückig aus einem Werkstoff mit guten Laufbahn-/Gleiteigenschaften, insbesondere verschleiß- und reibungsarm, für den Flügel und den Rotor hergestellt ist. Das hat den Vorteil, dass nur die Einsatzbuchse, nicht aber das übrige Gehäuse der Pumpe aus einem hochwertigen Werkstoff herzustellen ist.A pump according to the invention is characterized in that the insert bush is made in one piece from a material with good track / sliding properties, in particular wear and friction, for the wing and the rotor. This has the advantage that only the insert bush, but not the rest of the housing of the pump is made of a high quality material.

Bevorzugt wird auch eine Pumpe, bei welcher das Gehäuse aus einem Flanschteil, einen im Wesentlichen rohrförmigen Zwischenteil und einem Abschlussdeckelteil dargestellt ist. Das hat den Vorteil, dass ein einfacher Aufbau der Kühleinrichtung durch zwei Rohrteile, nämlich die des Gehäuses und die der Einsatzbuchse, herstellbar ist.Also preferred is a pump in which the housing is represented by a flange part, a substantially tubular intermediate part and a end cover part. This has the advantage that a simple construction of the cooling device by two pipe parts, namely that of the housing and the insert sleeve, can be produced.

Weiterhin wird eine Pumpe bevorzugt, bei der als Kühlmittel die Kühlflüssigkeit oder das Schmieröl des Verbrennungsmotors verwendet wird.Furthermore, a pump is preferred in which the cooling liquid or the lubricating oil of the internal combustion engine is used as the coolant.

Auch wird eine Pumpe bevorzugt, bei welcher die Pumpe als so genannte trockenlaufende Pumpe, d.h. ohne Schmieröl mit einer nasslaufenden, d. h. durch Schmieröl geschmierten und gekühlten Vakuumpumpe kombiniert ist.Also preferred is a pump in which the pump is referred to as a so-called dry running pump, i. without lubricating oil with a wet-running, d. H. lubricated by lubricating oil and cooled vacuum pump is combined.

Eine erfindungsgemäße Pumpe zeichnet sich dadurch aus, dass die Einsatzbuchse aus Kunststoff dargestellt ist. Das hat den Vorteil, dass die außen an der Buchse angeordneten schraubenförmigen Kühlkanäle durch den Kunststoffspritzvorgang bereits fertig ausgeformt herstellbar sind.A pump according to the invention is characterized in that the insert bush is made of plastic. This has the advantage that the screw-shaped cooling channels arranged on the outside of the bushing can already be produced by the plastic injection process.

Auch wird eine Pumpe bevorzugt, bei welcher der Flügel aus Kunststoff, gegebenenfalls mit Kappen aus einem verschleißarmen, reibungsarmen Kunststoff, hergestellt ist. Weiterhin wird eine Pumpe bevorzugt, bei welcher der Rotor aus Kunststoff hergestellt ist.Also, a pump is preferred in which the wing made of plastic, optionally with caps made of a low-wear, low-friction plastic. Furthermore, a pump is preferred in which the rotor is made of plastic.

Eine weitere erfindungsgemäße Pumpe zeichnet sich dadurch aus, dass das Gehäuse aus einem metallischen Werkstoff, beispielsweise aus Eisenblech oder aus Aluminiumdruckguss hergestellt ist.Another pump according to the invention is characterized in that the housing is made of a metallic material, for example made of sheet iron or aluminum die-cast.

Die Erfindung wird nun anhand der Figuren beschrieben.

Figur 1
zeigt die Einsatzbuchse und die Gehäuseteile einer erfindungsgemäßen Pumpe.
Figur 2
zeigt einen Querschnitt durch eine Kombination einer erfindungsgemäßen trockenlaufenden Pumpe mit einer nasslaufenden Vakuumpumpe.
The invention will now be described with reference to the figures.
FIG. 1
shows the insert bush and the housing parts of a pump according to the invention.
FIG. 2
shows a cross section through a combination of a dry running pump according to the invention with a wet-running vacuum pump.

In Figur 1 sind die Einzelteile des Gehäuses und der buchsenförmige Einsatz der Kühleinrichtung dargestellt. Ein etwa zylinderförmiges oder topfförmiges Gehäuse 1, welches aus einem metallischen Werkstoff wie beispielsweise Aluminiumdruckguss hergestellt ist, weist eine glatte, zylindrische Innenmantelfläche 3 auf. Das Gehäuse 1 kann aber ebenso gut aus einem Eisenblechwerkstoff, beispielsweise durch ein Tiefziehverfahren, oder durch einen Kunststoffwerkstoff hergestellt sein. Das Gehäuse 1 weist weiter hin eine Flanschseite mit Montageaugen 5 auf und kann mit dieser Seite an eine nasslaufende Vakuumpumpe nach dem Stand der Technik angeflanscht werden, beispielsweise unter Verwendung von Schrauben 7. In das Gehäuse 1 wird eine Einsatzbuchse 9 eingesetzt, welche an ihrer zylindrischen Außenfläche schraubenförmige Nuten 11 aufweist. Nach dem Einsetzen der Einsatzbuchse 9 in das Gehäuse 1 dichtet die Außenmantelfläche 13 der Einsatzbuchse 9 gegen die zylindrische Innenfläche 3 des Gehäuses 1 hermetisch ab, sodass nur die schraubenförmigen Nuten 11 innerhalb des nun doppelwandig dargestellten Gehäuses einen umlaufenden Kanal bilden. Durch diesen Kanal kann ein entsprechendes Kühlmittel von außen herangeführt werden, beispielsweise aus dem Kühlwasserkreislauf des Verbrennungsmotors oder dem Schmierölkreislauf des Verbrennungsmotors. Innerhalb der Einsatzbuchse 9 wird ein hier nicht dargestellter Rotor, welcher exzentrisch gegenüber dem Gehäuse gelagert ist, und beispielsweise ein in diesem Rotor innerhalb eines Schlitzes befindlicher Flügel über eine Antriebswelle oder eine Kupplungseinrichtung drehangetrieben. Das nun doppelwandig dargestellte Gehäuse wird mittels eines Abschlussdeckels 15 verschlossen und der Deckel 15 durch entsprechende Schrauben 17 gegen das Gehäuse 1 und gegen die Einsatzbuchse 9 gezogen. Die Einsatzbuchse 9 wird dabei bevorzugt aus einem hochwertigen, verschleißfesten Werkstoff mit guten Gleiteigenschaften hergestellt, da in der Buchse 9 der Flügel mit seinen Endkappen dichtend an der Innenwand der Buchse 9 entlang gleitet. Vorzugsweise wird für die Einsatzbuchse 9 ein hochwertiger Kunststoff ausgewählt, welche sowohl verschleißarm ist als auch gute Gleiteigenschaften aufweist und außerdem durch seine gewisse Elastizität gegenüber metallischen Werkstoffen gut gegen die Innenwandung 3 des Gehäuses 1 abdichten kann.In FIG. 1 the individual parts of the housing and the bush-shaped insert of the cooling device are shown. An approximately cylindrical or pot-shaped housing 1, which is made of a metallic material such as aluminum die cast, has a smooth, cylindrical inner surface 3. However, the housing 1 can just as well be made of an iron sheet material, for example by a deep drawing process, or by a plastic material. The housing 1 further has a flange side with mounting eyes 5 and can be flanged with this side of a wet-running vacuum pump according to the prior art, for example using screws 7. In the housing 1, an insert sleeve 9 is inserted, which on its cylindrical Outside surface has helical grooves 11. After inserting the insert bushing 9 in the housing 1, the outer circumferential surface 13 of the insert bushing 9 seals hermetically against the cylindrical inner surface 3 of the housing 1, so that only the helical grooves 11 within the now double-walled housing form a circumferential channel. Through this channel, a corresponding coolant can be brought from the outside, for example from the cooling water circuit of the engine or the lubricating oil circuit of the engine. Within the insert bushing 9 is a rotor, not shown here, which is eccentrically mounted relative to the housing, and, for example, a rotatably located in this rotor within a slot wing via a drive shaft or a coupling device. The now double-walled housing is closed by means of a cover cover 15 and the cover 15 is pulled by appropriate screws 17 against the housing 1 and against the insert sleeve 9. The insert bush 9 is preferably made of a high-quality, wear-resistant material with good sliding properties, since in the socket 9, the wing with its end caps sealingly slides along the inner wall of the bushing 9 along. Preferably, a high-quality plastic is selected for the insert bushing 9, which is both wear-resistant and has good sliding properties and also can seal well against the inner wall 3 of the housing 1 by its certain elasticity to metallic materials.

In Figur 2 ist die erfindungsgemäße Pumpe in Kombination mit einer so genannten nasslaufenden Vakuumpumpe dargestellt. Gleiche Teile sind hier mit gleichen Bezugszeichen wie in Figur 1 versehen. Im Querschnitt sieht man das Gehäuse 1 mit der Innenwand 3, in weichem die Einsatzbuchse 9 mit ihren schraubenartigen Nuten 11 eingesetzt ist. Die Einsatzbuchse 9 dichtet mit ihrer Oberfläche 13 gegen das Gehäuse 1 mit der Innenfläche 3 ab. Gehäuse 1 und Einsatzbuchse 9 werden durch den Deckel 15 seitlich abgedichtet. Zusätzlich sind zwischen dem Deckel 15, dem Gehäuse 1 und der Einsatzbuchse 9 jeweils Dichtungen 19 und 21 angeordnet. Die flüssigkeitsgekühlte Vakuumpumpe wird auf der anderen Seite durch einen Flansch 23 abgeschlossen, welcher Dichtungen 25 zum Gehäuse 1 hin und Dichtungen 27 zur Einsatzbuchse hin aufweist. Innerhalb der Einsatzbuchse 9 ist ein im Querschnitt dargestellter Rotor 29 exzentrisch angeordnet, welcher zwei Antriebswellenenden 31 und 33 aufweist. Die Wellenenden 31 und 33 sind wiederum in zwei Lagern 35 und 37 gelagert, wobei das Lager 35 in einer Ausnehmung des Deckels 15 angeordnet ist und das Lager 37 im Flansch 23. Weiterhin wird die flüssigkeitsgekühlte Vakuumpumpe durch eine Wellenabdichtung 39 gegenüber der nasslaufenden Vakuumpumpe 41 abgedichtet. Der Flansch 23 bildet dabei den Übergang zur nasslaufenden Vakuumpumpe 41 und ist damit gleichzeitig Teil des Gehäuses dieser Vakuumpumpe 41. Die Vakuumpumpe 41 weist weiterhin ein Gehäuse 43 und einen Rotor 45 auf. Innerhalb des Rotors 45 ist im Querschnitt ein Flügel 47 erkennbar. Der Rotor 45 wird über eine Antriebsfläche 49 und eine Kupplung 51 mit einem Antrieb, beispielsweise dem aus dem Verbrennungsmotor herausragenden Wellenende einer Nockenwelle, angetrieben. Auf der der Kupplung 51 gegenüber liegenden Seite weist der Rotor 45 eine zweite Kupplungseinrichtung 53 auf, welche den Antrieb für den Wellenabschnitt 33 der flüssigkeitsgekühlten Vakuumpumpe darstellt. Während die nasslaufende Pumpe 41 über Schmierölzuführeinrichtungen, welche hier teilweise durch Kanäle 55 im Querschnitt dargestellt sind, geschmiert und gekühlt wird, ist das bei der flüssigkeitsgekühlten Vakuumpumpe nicht der Fall. Daher wird zur Kühlung der trockenlaufenden Vakuumpumpe durch einen Einlass 57 ein Kühlmittelstrom in die schraubenförmigen Ringkanäle 11 eingebracht und durch einen entsprechenden Abfluss 59 der Kühlmittelstrom wiederum in den weiteren Kühlmittelkreislauf des Kraftfahrzeuges geführt. Durch die Flüssigkeitskühlung kann also die bei Rotation der trockenlaufenden Vakuumpumpe angefallene Wärme abgeführt werden und damit ein Über hitzen der Pumpe vermieden werden. Ein Anwendungsbereich für die trockenlaufende Vakuumpumpe kann dabei die Absaugung von Blow-by-Gas aus dem Kurbelwellenraum des Verbrennungsmotors sein. Als einzelne flüssigkeitsgekühlte Pumpe kann die Vakuumpumpe aber auch, wie die nasslaufende Vakuumpumpe, für Bremskraftverstärkersysteme eingesetzt werden, falls aus irgendwelchen anderen Gründen eine Ölzufuhr aus dem Schmierölkreislauf des Verbrennungsmotors nicht möglich ist.In FIG. 2 the pump according to the invention is shown in combination with a so-called wet-running vacuum pump. Same parts are here with the same reference numerals as in FIG. 1 Mistake. In cross-section you can see the housing 1 with the inner wall 3, in soft the insert sleeve 9 is inserted with its helical grooves 11. The insert bush 9 seals with its surface 13 against the housing 1 with the inner surface 3 from. Housing 1 and insert bushing 9 are laterally sealed by the lid 15. In addition, seals 19 and 21 are respectively arranged between the cover 15, the housing 1 and the insert bush 9. The liquid-cooled vacuum pump is closed on the other side by a flange 23, which has seals 25 to the housing 1 and seals 27 to the insert bushing out. Inside the insert bushing 9, a rotor 29, shown in cross-section, is arranged eccentrically, which has two drive shaft ends 31 and 33. The shaft ends 31 and 33 are in turn mounted in two bearings 35 and 37, wherein the bearing 35 is disposed in a recess of the lid 15 and the bearing 37 in the flange 23. Furthermore, the liquid-cooled vacuum pump is sealed by a shaft seal 39 against the wet-running vacuum pump 41 , The flange 23 forms the transition to the wet-running vacuum pump 41 and is thus at the same time part of the housing of this vacuum pump 41. The vacuum pump 41 further comprises a housing 43 and a rotor 45. Within the rotor 45, a wing 47 can be seen in cross-section. The rotor 45 is driven via a drive surface 49 and a clutch 51 with a drive, for example, protruding from the engine shaft end of a camshaft. On the side opposite the coupling 51, the rotor 45 has a second coupling device 53, which constitutes the drive for the shaft section 33 of the liquid-cooled vacuum pump. While the wet-running pump 41 is lubricated and cooled by lubricating oil supply means, which are partially shown here by channels 55 in cross-section, this is not the case with the liquid-cooled vacuum pump. Therefore, for cooling the dry running vacuum pump through an inlet 57, a coolant flow is introduced into the helical annular channels 11 and guided by a corresponding outflow 59 of the coolant flow in turn into the further coolant circuit of the motor vehicle. By the liquid cooling so incurred during rotation of the dry-running vacuum pump heat can be dissipated and thus overheating the pump can be avoided. One area of application for the dry-running vacuum pump can be the extraction of blow-by gas from the crankshaft space of the internal combustion engine. As a single liquid-cooled pump, however, the vacuum pump can also, like the wet-running vacuum pump, be used for brake booster systems if oil supply from the lubricating oil circuit of the internal combustion engine is not possible for any other reason.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
topfförmiges Gehäusepot-shaped housing
33
zylindrische Innenmantelflächecylindrical inner surface
55
MontageaugenFixing eyes
77
Schraubenscrew
99
Einsatzbuchseinsert sleeve
1111
schraubenförmige Nutenhelical grooves
1313
Außenmantelfläche der Einsatzbuchse 9Outer jacket surface of the insert bush 9
1515
AbschlussdeckelEnd cover
1717
Schraubenscrew
1919
Dichtung für GehäuseSeal for housing
2121
Dichtung für EinsatzbuchseSeal for insert bush
2323
Flanschflange
2525
Dichtung am GehäuseSeal on the housing
2727
Dichtung an EinsatzbuchseSeal to insert bushing
2929
Rotorrotor
3131
AntriebswellehendeDrive shaft Hende
3333
AntriebswellenendeDrive shaft end
3535
Lager im Deckel 15Bearing in the lid 15
3737
Lager im Flansch 23Bearing in flange 23
3939
Wellenabdichtungshaft seal
4141
nasslaufende VakuumpumpeWet running vacuum pump
4343
Gehäuse der Vakuumpumpe 41Housing of the vacuum pump 41
4545
Rotor der Vakuumpumpe 41Rotor of the vacuum pump 41
4747
Flügel der Vakuumpumpe 41Wings of the vacuum pump 41
4949
Antriebsfläche des Rotors 45Driving surface of the rotor 45
5151
Kupplungclutch
5353
zweite Kupplungseinrichtungsecond coupling device
5555
SchmierölkanäleOil channels
5757
Einlass für KühlmittelstromInlet for coolant flow
5959
Abfluss für KühlmittelstromOutflow for coolant flow

Claims (11)

  1. Pump, in particular a vane pump for vacuum for brake boosters in motor vehicles or to draw off blow-by gas from the crankcase of combustion engines, having a housing (1), with a rotor and with at least one rotor blade and a fluid cooling device, characterized in that the cooling device is represented by a simple, essentially cylindrical insert sleeve (9) by employing it within the housing (1).
  2. The pump according to Claim 1, characterized in that the insert sleeve (9) constitutes both a liner for the rotor blade and rotor and also one of the walls of the cooling device.
  3. The pump according to Claim 1 or Claim 2, characterized in that the insert sleeve (9) has a helical groove (11) on its outer circumferential surface (13), which forms a cooling duct together with the inner circumferential surface (3) of the housing (1).
  4. The pump according to Claim 1 or Claim 2 or Claim 3, characterized in that the insert sleeve (9) is made in a single piece from a material with good track and sliding properties for the blade and the rotor.
  5. The pump according to one of the preceding claims, characterized in that the housing is made up of a flange part (23), an essentially pipe-shaped intermediate part (1) and an end cover part (15).
  6. The pump according to one of the preceding claims, characterized in that the cooling fluid or lubricating oil of a combustion engine is used as the coolant.
  7. The pump according to one of the preceding claims, characterized in that the pump, as a so-called dry-running pump, is combined with a wet-running vacuum pump (41), i.e., a vacuum pump lubricated and cooled by lubricating oil.
  8. The pump according to one of the preceding claims, characterized in that the insert sleeve (9) is made of plastic.
  9. The pump according to one of the preceding claims, characterized in that the rotor blade is made of plastic, if necessary with caps made of a low-wear, low-friction plastic.
  10. The pump according to one of the preceding claims, characterized in that the rotor is made of plastic.
  11. The pump according to one of the preceding claims, characterized in that the housing is made of a metal material, for example iron sheet or die-cast aluminum.
EP06805452A 2005-11-09 2006-10-20 Pump with a cylindrical cooling bush Revoked EP1948938B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005053456 2005-11-09
PCT/DE2006/001852 WO2007054057A1 (en) 2005-11-09 2006-10-20 Pump with a cylindrical cooling bush

Publications (2)

Publication Number Publication Date
EP1948938A1 EP1948938A1 (en) 2008-07-30
EP1948938B1 true EP1948938B1 (en) 2009-02-25

Family

ID=37698114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06805452A Revoked EP1948938B1 (en) 2005-11-09 2006-10-20 Pump with a cylindrical cooling bush

Country Status (6)

Country Link
US (1) US8192184B2 (en)
EP (1) EP1948938B1 (en)
JP (1) JP5069244B2 (en)
AT (1) ATE423907T1 (en)
DE (2) DE112006002787A5 (en)
WO (1) WO2007054057A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009018213B4 (en) * 2009-04-21 2015-07-09 Oerlikon Leybold Vacuum Gmbh vacuum pump housing
GB2487376A (en) * 2011-01-19 2012-07-25 Edwards Ltd Two material pump stator for corrosion resistance and thermal conductivity
EP2738424B1 (en) * 2011-07-26 2017-02-15 NSK Ltd. Ball screw bearing device
DE102012023050A1 (en) * 2012-11-26 2014-05-28 Volkswagen Aktiengesellschaft Method for producing electrical machine e.g. drive motor for vehicle, involves producing force-locking connection between stator and shell, such that the rotor is arranged in stator and a bearing plate is fixed at one end of shell
EP3120065B1 (en) 2014-03-18 2018-01-31 GE Avio S.r.l. Oil transfer assembly, to let lubricating oil flow from a stationary part to a rotating part, in particular for an epicyclic transmission
CN111120330A (en) * 2018-10-31 2020-05-08 广东美芝精密制造有限公司 Cylinder, manufacturing method of cylinder and rotary compressor
GB2596275A (en) * 2020-05-20 2021-12-29 Edwards Ltd Cooling element
CN112032022B (en) * 2020-09-10 2024-04-26 北京通嘉宏瑞科技有限公司 Dry vacuum pump without dead angle purge gas and use method thereof

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Publication number Priority date Publication date Assignee Title
US3193190A (en) * 1965-07-06 Lindberg vacuum pump
US2938468A (en) * 1957-09-13 1960-05-31 Allis Chalmers Mfg Co Fluid pump
US3291221A (en) * 1966-01-05 1966-12-13 Foster Wheeler Corp Vane adjusting mechanism for variable pitch mixed flow pumps and turbine wheels
US3374943A (en) 1966-08-15 1968-03-26 Kenneth G Cervenka Rotary gas compressor
GB1427053A (en) * 1973-09-18 1976-03-03 Rolls Royce Motors Ltd Engine housings
JPS5084809U (en) * 1973-12-04 1975-07-19
FR2384970A1 (en) * 1977-03-22 1978-10-20 Barmag Barmer Maschf ROTARY PALLET MACHINE, SIMPLIFIED ATTACHMENT
US4760833A (en) * 1986-09-02 1988-08-02 Tatyrek Alfred F Engine crankcase vacuum check valve system for internal combustion engines
DE3911314A1 (en) * 1989-04-07 1990-10-11 Leybold Ag VACUUM PUMP
JPH03258989A (en) 1990-03-07 1991-11-19 Hideo Nagamitsu Accumulator type vacuum pump and blower
JPH08232871A (en) * 1995-02-22 1996-09-10 Nissan Motor Co Ltd Oil seal mechanism of vacuum pump for vehicle
US6394777B2 (en) * 2000-01-07 2002-05-28 The Nash Engineering Company Cooling gas in a rotary screw type pump
JP2003343463A (en) * 2002-05-22 2003-12-03 Aisan Ind Co Ltd Vane type vacuum pump
DE10307813B4 (en) 2003-02-24 2006-05-24 Siemens Ag Electric machine

Also Published As

Publication number Publication date
WO2007054057A1 (en) 2007-05-18
EP1948938A1 (en) 2008-07-30
JP5069244B2 (en) 2012-11-07
DE112006002787A5 (en) 2008-09-04
ATE423907T1 (en) 2009-03-15
US20090226337A1 (en) 2009-09-10
JP2009515082A (en) 2009-04-09
DE502006002979D1 (en) 2009-04-09
US8192184B2 (en) 2012-06-05

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