EP1444440A1 - Cooled screw-type vacuum pump - Google Patents

Cooled screw-type vacuum pump

Info

Publication number
EP1444440A1
EP1444440A1 EP02790310A EP02790310A EP1444440A1 EP 1444440 A1 EP1444440 A1 EP 1444440A1 EP 02790310 A EP02790310 A EP 02790310A EP 02790310 A EP02790310 A EP 02790310A EP 1444440 A1 EP1444440 A1 EP 1444440A1
Authority
EP
European Patent Office
Prior art keywords
cooling
pump
housing
rotors
pump according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02790310A
Other languages
German (de)
French (fr)
Other versions
EP1444440B1 (en
Inventor
Manfred Behling
Hartmut Kriehn
Klaus Rofall
Ralf Steffens
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.)
Leybold GmbH
Original Assignee
Leybold Vakuum 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 Leybold Vakuum GmbH filed Critical Leybold Vakuum GmbH
Publication of EP1444440A1 publication Critical patent/EP1444440A1/en
Application granted granted Critical
Publication of EP1444440B1 publication Critical patent/EP1444440B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/086—Carter
    • 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
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw 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
    • 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
    • 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
    • F04C29/045—Heating; Cooling; Heat insulation of the electric motor in hermetic pumps
    • 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
    • F04C2240/60—Shafts
    • F04C2240/603—Shafts with internal channels for fluid distribution, e.g. hollow shaft

Definitions

  • the invention relates to a screw vacuum pump with a pump housing, with rotors accommodated in this housing, with a liquid cooling for the rotors and with a drive motor.
  • the present invention has for its object to improve the cooling of a screw vacuum pump with the features mentioned. According to the invention, this object is achieved by the characterizing features of the claims.
  • a forced air flow which is generated, for example, by a fan coupled to the drive motor
  • the invention makes it possible to implement a cooling concept for a screw vacuum pump, in which the entire machine is air-cooled, although there is also liquid cooling for the rotors.
  • the heat generated is absorbed by two different heat transfer media (liquid for the internal rotor cooling, external cooling air flow), but ultimately it is dissipated from the cooling air flow. This also applies to the dissipation of secondary heat flows, generated by engine losses, gearbox and bearing losses etc.
  • the screw vacuum pump to be cooled is designated by 1, its pump chamber housing by 2, its rotors by 3, 4, its inlet by 5 and its gearbox / engine compartment housing by 6, which connects to the pump chamber housing 2 by rotors 3, 4 , An outlet on the pressure side is not shown.
  • the gear chamber 7 In the housing 6 there are the gear chamber 7, the motor compartment 8 with the drive motor 9 and a further compartment 10, which is part of the coolant circuit for the rotors 3, 4.
  • the rotors 3, 4 are equipped with shafts 11, 12 which penetrate the gear chamber 7 and the engine compartment 8. About bearings in the partitions between the scooping area and 'gearbox 7 (partition 13) as well as engine compartment 8 and coolant space 10 (partition 14), the rotors 3, 4 are overhung.
  • the partition between the gear compartment 7 and the engine compartment 8 is designated 15.
  • the gear pair 7, which causes the synchronous rotation of the rotors 3, 4, is the gear pair 16, 17.
  • the rotor shaft 11 is at the same time the drive shaft of the motor 9.
  • the motor 9 can also have a drive shaft different from the shafts 11, 12. In such a solution, its drive shaft ends in the gear chamber 7 and is equipped there with a gearwheel which engages with one of the synchronization gearwheels 16, 17 (or with another gearwheel of the shaft 12, not shown).
  • the shaft 11 passes through the space 10, is guided out of the housing 6 of the pump 1 and carries the wheel 20 of a fan or fan 21 at its free end.
  • a housing 22 comprising the pump 1 is used to guide the air movement generated by the fan wheel 20, that is open in the area of both end faces (openings 23, 24).
  • the fan 21 is operated such that the fan / motor-side opening 24 forms the air inlet opening.
  • a heat exchanger 25 through which the cooling liquid of the rotor internal cooling flows.
  • the heat exchanger 25 is expediently arranged in front of the fan 21, so that it simultaneously forms a contactor for the fan wheel 20.
  • the advantage of this arrangement is that it cools the pump chamber housing 2 of the pump 1 Air flow is preheated. It is thereby achieved that thermal expansions of the pumping chamber housing 2 are permitted to the extent that the rotors 3, 4, which assume relatively high temperatures during the operation of the pump 1, do not touch the housing 2.
  • the housing 2 and the rotors 3, 4 are preferably made of aluminum to improve the heat conduction. Furthermore, the housing 2 can have ribs to improve the thermal contact.
  • the gap between the rotors 3, 4 and the housing 2 is set by the size of the heat exchanger 25 and also the degree of ribbing of the pump chamber housing 2.
  • the coolant circuit for cooling the rotors 4, 5 is only indicated schematically.
  • German patent applications 197 45 616, 1 . 99 63 171.9 and 199 63 172.7 cooling systems of this type are described in detail.
  • the shafts 11 and 12 serve to transport the coolant (for example oil) to and from the rotors 3, 4.
  • the coolant leaving the rotors 3, 4 collects in the engine compartment 8. From there it is passed over the Line 26 supplied to the heat exchanger 25.
  • the air flow generated by the fan 21 absorbs the heat absorbed by the cooling liquid in the rotors 3, 4.
  • the liquid leaving the heat exchanger 25 is supplied to the space 10 via the line 26.
  • the features according to the invention make it possible to further increase the power density of a screw pump.
  • the pump can be made smaller and operated with higher surface temperatures.
  • the outer air duct housing 22 also functions as a touch guard.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

The invention relates to a screw-type vacuum pump (1) comprising a pump housing (2, 6) with rotors (3, 4) arranged therein, a liquid cooling system for the rotors and a drive motor (9). In order to improve the cooling of said pump, an external air-flow impelled cooling system is also provided for the pump housing (2,6).

Description

Gekühlte SchraubenvakuumpumpeCooled screw vacuum pump
Die Erfindung bezieht sich auf eine Schraubenvakuumpumpe mit einem Pumpengehäuse, mit in diesem Gehäuse untergebrachten Rotoren, mit einer Flüssigkeitskühlung für die Rotoren sowie mit einem Antriebsmotor.The invention relates to a screw vacuum pump with a pump housing, with rotors accommodated in this housing, with a liquid cooling for the rotors and with a drive motor.
Aus der DE-A-198 20 523 ist eine Schraubenvakuumpumpe mit diesen Merkmalen bekannt. Die genannte Schrift offenbart darüber hinaus die vielfachen Probleme, die mit der Kühlung von Schraubenvakuumpumpen verbunden sind, wenn diese mit hohen Leistungsdichten - kompakt und mit hohen Drehzahlen - gebaut und betrieben werden sollen.From DE-A-198 20 523 a screw vacuum pump with these features is known. The cited document also discloses the multiple problems associated with cooling screw vacuum pumps when they are to be built and operated with high power densities - compact and at high speeds.
Der .vorliegenden Erfindung liegt die Aufgabe zugrunde, die Kühlung einer Schraubenvakuumpumpe mit den eingangs genannten Merkmalen zu verbessern. Erfindungsgemäß wird diese Aufgabe durch die kennzeichnenden Merkmale der Patentansprüche gelöst.The present invention has for its object to improve the cooling of a screw vacuum pump with the features mentioned. According to the invention, this object is achieved by the characterizing features of the claims.
Die erfindungsgemäße zusätzliche Kühlung des Pumpengehäuses von außen, und zwar mit einer erzwungenen Luftströmung, die beispielsweise von einem mit dem Antriebsmotor gekoppelten Lüfter erzeugt wird, entlastet die in der Pumpe befindliche Flüssigkeitskühlung der Rotoren erheblich. Zusätzlich ist es möglich, mit Hilfe der erzwungenen Luftströmung auch einen Wärmetauscher zu kühlen, der von der Kühlflüssigkeit der Rotorkühlung durchströmt ist.The additional cooling of the pump housing according to the invention from the outside, specifically with a forced air flow, which is generated, for example, by a fan coupled to the drive motor, considerably relieves the liquid cooling of the rotors in the pump. In addition, it is also possible to use the forced air flow to create a heat exchanger to cool, which is flowed through by the cooling liquid of the rotor cooling.
Die Erfindung ermöglicht es, ein Kühlkonzept für eine Schraubenvakuumpumpe zu realisieren, bei dem die gesamte Maschine luftgekühlt ist, obwohl zusätzlich eine Flüssigkeitskühlung für die Rotoren vorhanden ist. Die entstehende Wärme wird zwar von zwei unterschiedlichen Wärmeträgern (Flüssigkeit für die innere Rotorkühlung, äußerer Kühlluftstrom) aufgenommen, letztlich aber insgesamt vom Kühlluftstrom abgeführt. Dieses gilt auch für die Abführung von Nebenwärmeströmen, erzeugt von Motorverlusten, Getriebe- und Lagerverlusten etc..The invention makes it possible to implement a cooling concept for a screw vacuum pump, in which the entire machine is air-cooled, although there is also liquid cooling for the rotors. The heat generated is absorbed by two different heat transfer media (liquid for the internal rotor cooling, external cooling air flow), but ultimately it is dissipated from the cooling air flow. This also applies to the dissipation of secondary heat flows, generated by engine losses, gearbox and bearing losses etc.
Weitere Vorteile und Einzelheiten der Erfindung sollen anhand eines in der Figur schematisch dargestellten Ausführungsbeispieles erläutert werden.Further advantages and details of the invention will be explained with reference to an exemplary embodiment shown schematically in the figure.
In der Figur sind die zu kühlende Schraubenvakuumpumpe mit 1, ihr Schöpfraumgehäuse mit 2, ihre Rotoren mit 3, 4, ihr Einlass mit 5 und ihr sich an das Schöpfraumgehäuse 2 mit den Rotoren 3, 4 anschließendes Getriebe- /Motorraum-Gehäuse mit 6 bezeichnet. Ein druckseitig gelegener Auslass ist nicht dargestellt. Im Gehäuse 6 befinden sich der Getrieberaum 7, der Motorraum 8 mit dem Antriebsmotor 9 und ein weiterer Raum 10, der Bestandteil des Kühlflüssigkeitskreislaufs für die Rotoren 3, 4 ist.In the figure, the screw vacuum pump to be cooled is designated by 1, its pump chamber housing by 2, its rotors by 3, 4, its inlet by 5 and its gearbox / engine compartment housing by 6, which connects to the pump chamber housing 2 by rotors 3, 4 , An outlet on the pressure side is not shown. In the housing 6 there are the gear chamber 7, the motor compartment 8 with the drive motor 9 and a further compartment 10, which is part of the coolant circuit for the rotors 3, 4.
Die Rotoren 3, 4 sind mit Wellen 11, 12 ausgerüstet, die den Getrieberaum 7 und den Motorraum 8 durchsetzen. Über Lagerungen in den Trennwänden zwischen Schöpfraum und' Getrieberaum 7 (Trennwand 13) sowie Motorraum 8 und Kühlflüssigkeitsraum 10 (Trennwand 14) sind die Rotoren 3, 4 fliegend gelagert. Die Trennwand zwischen Getrieberaum 7 und Motorraum 8 ist mit 15 bezeichnet. Im Getrieberaum 7 befindet sich das die synchrone Drehung der Rotoren 3, 4 bewirkende Zahnradpaar 16, 17. Die Rotorwelle 11 ist gleichzeitig die Antriebswelle des Motors 9. Der Motor 9 kann auch eine von den Wellen 11, 12 verschiedene Antriebswelle haben. Bei einer solchen Lösung endet seine Antriebswelle im Getrieberaum 7 und ist dort mit einem Zahnrad ausgerüstet, das mit einem der SynchronisationsZahnräder 16, 17 (oder einem weiteren, nicht dargestellten Zahnrad der Welle 12) in Eingriff steht.The rotors 3, 4 are equipped with shafts 11, 12 which penetrate the gear chamber 7 and the engine compartment 8. About bearings in the partitions between the scooping area and 'gearbox 7 (partition 13) as well as engine compartment 8 and coolant space 10 (partition 14), the rotors 3, 4 are overhung. The partition between the gear compartment 7 and the engine compartment 8 is designated 15. The gear pair 7, which causes the synchronous rotation of the rotors 3, 4, is the gear pair 16, 17. The rotor shaft 11 is at the same time the drive shaft of the motor 9. The motor 9 can also have a drive shaft different from the shafts 11, 12. In such a solution, its drive shaft ends in the gear chamber 7 and is equipped there with a gearwheel which engages with one of the synchronization gearwheels 16, 17 (or with another gearwheel of the shaft 12, not shown).
Die Welle 11 durchsetzt den Raum 10, ist aus dem Gehäuse 6 der Pumpe 1 heraus geführt und trägt an ihrem freien Ende das Rad 20 eines Ventilators oder Lüfters 21. Der Führung der vom Lüfterrad 20 erzeugten Luftbewegung dient ein die Pumpe 1 umfassendes Gehäuse 22, das im Bereich beider Stirnseiten offen ist (Öffnungen 23, 24) .The shaft 11 passes through the space 10, is guided out of the housing 6 of the pump 1 and carries the wheel 20 of a fan or fan 21 at its free end. A housing 22 comprising the pump 1 is used to guide the air movement generated by the fan wheel 20, that is open in the area of both end faces (openings 23, 24).
Im Sinne der Erfindung wird der Lüfter 21 so betrieben, dass die lüfter-/motorseitige Öffnung 24 die Lufteintrittsöffnung bildet. Dieser Öffnung zugeordnet ist ein Wärmetauscher 25, der von der Kühlflüssigkeit der Rotorinnenkühlung durchströmt ist. Zweckmäßig ist der Wärmetauscher 25 dem Lüfter 21 vorgelagert, so dass er gleichzeitig einen Berührungsschütz für das Lüfterrad 20 bildet. Der Vorteil dieser Anordnung liegt darin, dass der das Schöpfraumgehäuse 2 der Pumpe 1 kühlende Luftstrom vorgewärmt ist. Dadurch wird erreicht, dass Wärmedehnungen des Schöpfraumgehäuses 2 in dem Umfange zugelassen werden, dass die während des Betriebs der Pumpe 1 relativ hohe Temperaturen annehmenden Rotoren 3, 4 das Gehäuse 2 nicht berühren. Vorzugsweise bestehen das Gehäuse 2 und die Rotoren 3 , 4 zur Verbesserung der Wärmeleitung aus Aluminium. Weiterhin kann das Gehäuse 2 zur Verbesserung des Wärmekontaktes Rippen aufweisen. Durch die Größe des Wärmetauschers 25 und auch des Verrippungsgrades des Schöpfraumgehäuses 2 wird der Spalt zwischen den Rotoren 3 , 4 und dem Gehäuse 2 eingestellt .In the sense of the invention, the fan 21 is operated such that the fan / motor-side opening 24 forms the air inlet opening. Associated with this opening is a heat exchanger 25 through which the cooling liquid of the rotor internal cooling flows. The heat exchanger 25 is expediently arranged in front of the fan 21, so that it simultaneously forms a contactor for the fan wheel 20. The advantage of this arrangement is that it cools the pump chamber housing 2 of the pump 1 Air flow is preheated. It is thereby achieved that thermal expansions of the pumping chamber housing 2 are permitted to the extent that the rotors 3, 4, which assume relatively high temperatures during the operation of the pump 1, do not touch the housing 2. The housing 2 and the rotors 3, 4 are preferably made of aluminum to improve the heat conduction. Furthermore, the housing 2 can have ribs to improve the thermal contact. The gap between the rotors 3, 4 and the housing 2 is set by the size of the heat exchanger 25 and also the degree of ribbing of the pump chamber housing 2.
Der Kühlflüssigkeitskreislauf für die Kühlung der Rotoren 4, 5 ist nur schematisch angedeutet. In den deutschen Patentanmeldungen 197 45 616, 1.99 63 171.9 und 199 63 172.7 sind Kühlsysteme dieser Art ausführlich beschrieben. Die Wellen 11 und 12 dienen dem Transport des Kühlmittels (z. B. Öl) zu und von den Rotoren 3, 4. Beim dargestellten Ausführungsbeispiel sammelt sich das die Rotoren 3 , 4 verlassende Kühlmittel im Motorraum 8. Von dort aus wird es über die Leitung 26 dem Wärmetauscher 25 zugeführt. Der vom Lüfter 21 erzeugte Luftstrom nimmt die von der Kühlflüssigkeit in den Rotoren 3, 4 aufgenommene Wärme auf. Die den Wärmetauscher 25 verlassende Flüssigkeit wird über die Leitung 26 dem Raum 10 zugeführt. In im einzelnen nicht dargestellter Weise gelangt sie von dort durch in den Wellen 11, 12 befindliche Bohrungen zu den Rotoren 3, 4, durchströmt dort Kühlkanäle und gelangt durch die Wellen 11, 12 zurück in den Motorraum 8. Als' zweckmäßig hat es sich erwiesen, das Kühlsystem so einzustellen, dass etwa die Hälfte der von der Pumpe erzeugten Wärme zunächst von der Kühlflüssigkeit aufgenommen und danach über den Wärmetauscher 25 abgeführt wird und dass die andere Hälfte unmittelbar vom Kühlluftström abgeführt wird.The coolant circuit for cooling the rotors 4, 5 is only indicated schematically. In German patent applications 197 45 616, 1 . 99 63 171.9 and 199 63 172.7 cooling systems of this type are described in detail. The shafts 11 and 12 serve to transport the coolant (for example oil) to and from the rotors 3, 4. In the exemplary embodiment shown, the coolant leaving the rotors 3, 4 collects in the engine compartment 8. From there it is passed over the Line 26 supplied to the heat exchanger 25. The air flow generated by the fan 21 absorbs the heat absorbed by the cooling liquid in the rotors 3, 4. The liquid leaving the heat exchanger 25 is supplied to the space 10 via the line 26. In a manner not shown in detail, it passes from there through bores in the shafts 11, 12 to the rotors 3, 4, flows through cooling channels there and returns through the shafts 11, 12 into the engine compartment 8. It has proven to be expedient to set the cooling system in such a way that approximately half of the heat generated by the pump is initially absorbed by the cooling liquid and then dissipated via the heat exchanger 25 and that the other half is dissipated directly by the cooling air flow.
Insgesamt erlauben es die Merkmale nach der Erfindung, die Leistungsdichte einer Schraubenpumpe weiter zu erhöhen. Die Pumpe kann kleiner ausgebildet und mit höheren Oberflächentemperaturen betrieben werden. Das äußere der Luftführung dienende Gehäuse 22 hat außerdem die Funktion eines Berührungsschutzes . Overall, the features according to the invention make it possible to further increase the power density of a screw pump. The pump can be made smaller and operated with higher surface temperatures. The outer air duct housing 22 also functions as a touch guard.

Claims

PATENTANSPRUCHΞ PATENTANSPRUCHΞ
1. Schraubenvakuumpumpe (1) mit Pumpengehäuse (2, 6), mit in diesem Gehäuse untergebrachten Rotoren (3, 4) , mit einer Flüssigkeitskühlung für die Rotoren sowie mit einem Antriebsmotor (9), dadurch gekennzeichnet, dass zusätzlich eine äußere von einer erzwungenen Luftströmung bewirkte Kühlung für das Pumpengehäuse (2, 6) vorgesehen ist.1. Screw vacuum pump (1) with a pump housing (2, 6), with rotors (3, 4) accommodated in this housing, with a liquid cooling for the rotors and with a drive motor (9), characterized in that additionally an external one is forced Air flow caused cooling for the pump housing (2, 6) is provided.
2. Pumpe nach Anspruch 1 , dadurch gekennzeichnet, dass für die Erzeugung der erzwungenen Luftströmung ein Lüfter (21) vorgesehen ist, der mit dem Antriebsmotor (9) gekoppelt ist.2. Pump according to claim 1, characterized in that a fan (21) is provided for the generation of the forced air flow, which is coupled to the drive motor (9).
3. Pumpe nach Anspruch 1 oder 2 , dadurch gekennzeichnet, dass Lüfter (21), Antriebsmotor (9) und Pumpengehäuse (2) in Strömungsrichtung hintereinander angeordnet sind. 3. Pump according to claim 1 or 2, characterized in that fans (21), drive motor (9) and pump housing (2) are arranged one behind the other in the flow direction.
4. ■ Pumpe nach Anspruch 3 , dadurch gekennzeichnet, dass zumindest das Pumpengehäuse (2) mit äußeren Rippen ausgerüstet ist.4. ■ Pump according to claim 3, characterized in that at least the pump housing (2) is equipped with outer ribs.
5. Pumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Gehäuse (2) und die Rotoren (3, 4) aus Aluminium bestehen.5. Pump according to one of claims 1 to 4, characterized in that the housing (2) and the rotors (3, 4) consist of aluminum.
6. Pumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein äußeres Gehäuse (22) für die Führung der Kühlluft vorgesehen ist.6. Pump according to one of the preceding claims, characterized in that an outer housing (22) is provided for guiding the cooling air.
7. Pumpe nach Anspruch 6 , dadurch gekennzeichnet, dass sich der Lüfter .(21) auf der Lufteintrittsseite (24) befindet.7. Pump according to claim 6, characterized in that the fan (21) is on the air inlet side (24).
8. Pumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass auf der Seite des Lufteintritts (24) ein der Kühlflüssigkeit der Rotorkühlung durchströmter Wärmetauscher (25) angeordnet ist.8. Pump according to one of the preceding claims, characterized in that a heat exchanger (25) through which the cooling liquid of the rotor cooling flows is arranged on the side of the air inlet (24).
9. Pumpe nach Anspruch 5 , dadurch gekennzeichnet, dass sich der Wärmetauscher (25) in Kühlluftströ- mungsrichtung vor dem Lüfter (21) befindet.9. Pump according to claim 5, characterized in that the heat exchanger (25) is located in the cooling air flow direction in front of the fan (21).
10. Pumpe nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das Kühlsystem so ausgelegt ist, dass die vom flüssigen Kühlmittel abgeführte Wärmemenge und die direkt vom Luftstrom abgeführte Wärmemenge etwa gleich groß sind. 10. Pump according to one of claims 1 to 9, characterized in that the cooling system is designed so that the amount of heat dissipated by the liquid coolant and the amount of heat dissipated directly from the air flow are approximately the same size.
EP02790310.3A 2001-11-15 2002-10-30 Cooled screw-type vacuum pump Expired - Lifetime EP1444440B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10156180 2001-11-15
DE10156180.6A DE10156180B4 (en) 2001-11-15 2001-11-15 Cooled screw vacuum pump
PCT/EP2002/012086 WO2003042541A1 (en) 2001-11-15 2002-10-30 Cooled screw-type vacuum pump

Publications (2)

Publication Number Publication Date
EP1444440A1 true EP1444440A1 (en) 2004-08-11
EP1444440B1 EP1444440B1 (en) 2014-06-04

Family

ID=7705882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02790310.3A Expired - Lifetime EP1444440B1 (en) 2001-11-15 2002-10-30 Cooled screw-type vacuum pump

Country Status (10)

Country Link
US (1) US7056108B2 (en)
EP (1) EP1444440B1 (en)
JP (1) JP4589001B2 (en)
KR (1) KR100892530B1 (en)
CN (1) CN100422561C (en)
CA (1) CA2463617A1 (en)
DE (1) DE10156180B4 (en)
HU (1) HUP0402372A2 (en)
PL (1) PL206617B1 (en)
WO (1) WO2003042541A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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DE10156180A1 (en) 2003-05-28
EP1444440B1 (en) 2014-06-04
PL206617B1 (en) 2010-08-31
WO2003042541A1 (en) 2003-05-22
US7056108B2 (en) 2006-06-06
KR20050042067A (en) 2005-05-04
JP2005509785A (en) 2005-04-14
KR100892530B1 (en) 2009-04-10
US20040265160A1 (en) 2004-12-30
CN1585860A (en) 2005-02-23
CA2463617A1 (en) 2003-05-22
PL369467A1 (en) 2005-04-18
JP4589001B2 (en) 2010-12-01
HUP0402372A2 (en) 2005-03-29
DE10156180B4 (en) 2015-10-15

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