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EP1899583B1 - Lubrication system - Google Patents

Lubrication system Download PDF

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Publication number
EP1899583B1
EP1899583B1 EP06761720A EP06761720A EP1899583B1 EP 1899583 B1 EP1899583 B1 EP 1899583B1 EP 06761720 A EP06761720 A EP 06761720A EP 06761720 A EP06761720 A EP 06761720A EP 1899583 B1 EP1899583 B1 EP 1899583B1
Authority
EP
European Patent Office
Prior art keywords
lubricant
tank
shaft
lubrication system
separator
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.)
Ceased
Application number
EP06761720A
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German (de)
French (fr)
Other versions
EP1899583A1 (en
Inventor
Helmut Streifinger
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.)
MTU Aero Engines AG
Original Assignee
MTU Aero Engines GmbH
MTU Aero Engines AG
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.)
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Publication date
Application filed by MTU Aero Engines GmbH, MTU Aero Engines AG filed Critical MTU Aero Engines GmbH
Publication of EP1899583A1 publication Critical patent/EP1899583A1/en
Application granted granted Critical
Publication of EP1899583B1 publication Critical patent/EP1899583B1/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/18—Lubricating arrangements

Definitions

  • the invention relates to a lubricant system according to the preamble of claim 1.
  • Lubricant systems known from practice for supplying lubricant to a consumer comprise, in addition to a lubricant tank, at least one lubricant pump for removing the lubricant from the lubricant tank and for conveying the lubricant in the direction of the consumer, and at least one lubricant pump for returning the lubricant from the consumer to the lubricant tank.
  • a static lubricant separator is usually integrated in order to separate the air from the lubricant and to discharge it from the lubricant tank from the mixture of lubricant and air conveyed back into the lubricant tank.
  • the discharged from the lubricant tank air and venting air of the consumer are usually supplied to a rotating lubricant, wherein the case separated air is derived from the rotating lubricant separator via a so-called overboard vent line from the lubricant system.
  • the lubricant pumps and the lubricant separators include known from practice lubricant systems for supplying lubricant to a consumer lubricant filter and lubricant cooler, which are connected between the lubricant tank and the consumer.
  • lubricant systems for example, serving the lubricant supply of a consumer in a gas turbine aircraft engine
  • extreme flight maneuvers such as inverted flight, parabolic flight with weightlessness or negative acceleration vector and extreme climb or extreme descent.
  • lubricant systems usually employ a lubricant tank in which the lubricant is set in rotation by rotation of at least one drum integrated into the lubricant tank or by rotation of at least one blade integrated in the lubricant tank.
  • the lubricant due to centrifugal forces or centrifugal forces on a rotationally symmetrical wall of the lubricant tank to the plant and can be promoted from there in the direction of the consumer. Air is thus centrifuged out of the lubricant and accumulates in the middle of the lubricant tank, from where it is centrifuged out Air can be removed from the lubricant tank. In this case, it is possible to dispense with a static oil separator integrated in the lubricant tank. Lubricant systems with such a lubricant tank are, for example, from DE 30 50 765 C2 as well as from the DE 34 05 366 C2 known.
  • U.S.-A-4,049,401 and DE 30 47 719 A1 are known lubricant systems with tanks whose content is rotated by means of rotatable blades or drums in rotation.
  • the lubricant systems have rotating lubricant separators as well as appropriate pumps for lubricant delivery to and from the tank.
  • To simplify the drive of the rotating elements is provided, for example, to put the blades or drums and the lubricant on common shafts and drive together with or without gear ratio. It is also intended to power the pumps from the same drive.
  • the document WO 00/79103 A1 relates to an oil system for a gas turbine in which the oil pumps with hydraulic energy from the fuel system are driven.
  • the present invention based on the problem to provide an even simpler, more reliable lubricant system.
  • a lubricant system according to claim 1.
  • the or each rotating lubricant separator and the elements of the lubricant tank to be driven in rotation namely the or each drum or the or each blade, are mounted on a common shaft and driven by the common drive, optionally with the interposition of a transmission.
  • at least one lubricant pump for removing the lubricant from the lubricant tank and for conveying the lubricant in the direction of the consumer from the drive of the or each rotatable drum or the or each rotatable blade of the lubricant tank can be driven.
  • the or each rotating lubricant separator and the or each lubricant pump for removing the lubricant from the lubricant tank and the or each rotatable drum or the or each rotatable blade are mounted on a common shaft and driven via the shaft either directly or indirectly with the interposition of a transmission ,
  • Fig. 1 shows a schematic representation of an inventive assembly 10 of a lubricant system according to the invention according to a first embodiment of the present invention.
  • illustrated assembly 10 includes a lubricant tank 11, wherein in the lubricant tank 11 rotating blades 12 are integrated to enable the lubricant in the lubricant tank 11 located in rotation lubricant.
  • a lubricant ring is formed on a rotationally symmetrical wall 13 of the lubricant tank 11, wherein due to the centrifugal forces acting on the lubricant, air is centrifuged out of the lubricant.
  • the rotatably drivable blades 12 are mounted on a shaft 14 and driven by a non-illustrated drive from the shaft 14 from.
  • the rotationally symmetrical wall 13 of the lubricant tank 11 is designed in the form of a truncated cone, wherein the lubricant can be removed in a portion 15 of the wall 13 by means of a lubricant pump 16 from the lubricant tank 11 and conveyed in the direction of a consumer, not shown.
  • a lubricant pump 16 for removing the lubricant from the lubricant tank 11 shows Fig. 1
  • a mixture of lubricant and air is returned to the lubricant tank 11, the air being centrifuged out of the lubricant by the rotation of the blades 12 integrated in the lubricant tank 11 and by the formation of the lubricant ring on the wall 13 of the lubricant tank 11 becomes.
  • the air collects in a central portion of the lubricant tank 11 and is guided before being discharged from the lubricant tank 11 via a rotating lubricant separator 19. After passing through the rotating Schmierstoffabscheiders 19, the separated air from the lubricant via a so-called overboard vent line 20 is discharged.
  • the in Fig. 1 shown components of a lubricant system combined to form an assembly 10.
  • the rotating lubricant separator 19 can be driven by the drive of the rotating blades 12 and, for this purpose, on the same shaft 14 Likewise, the lubricant pump 16 for removing the lubricant from the lubricant tank 11 from the drive of the blades 12 driven.
  • the lubricant pumps 17 and 18, which serve to return the lubricant in the lubricant tank 11, driven by the drive of the blades 12 from.
  • the lubricant pumps 16, 17 and 18 as well as the rotating lubricant separator 19 are mounted on the shaft 14, on which also the integrated into the lubricant tank 11 blades 12 are mounted.
  • the assembly 10 of the embodiment of Fig. 1 is characterized by a compact design and can be designed as a so-called Line Replaceable Unit (LRU).
  • LRU Line Replaceable Unit
  • the assembly 10 may be installed in a gas turbine aircraft engine such that the shaft 14 on which the blades 12, rotary lubricant separator 19, and lubricant pumps 16, 17, and 18 are mounted extend either longitudinally or transversely to an engine axis.
  • the shaft 14 can be driven electrically, hydrostatically, hydrodynamically or pneumatically. It is also possible to mechanically drive the shaft 14 via an engine main shaft with the interposition of a transmission.
  • Fig. 2 shows an assembly 21 for a lubricant system according to the invention according to a second embodiment of the invention, wherein the assembly 21 of the Fig. 2 has the same components as the assembly 10 of Fig. 1 , Therefore, to avoid unnecessary repetition for identical components same reference numerals used.
  • the module 21 of Fig. 2 differs from the assembly 10 of Fig. 1 in that in the assembly 21 of the Fig. 2 Also, the pump unit comprising the lubricant pumps 16, 17 and 18 is integrated in the lubricant tank 11. As a result, the design can be reduced again.
  • the blades 12, the rotating lubricant separator 19 and the lubricant pumps 16, 17 and 18 are in turn mounted on a common shaft 14 and are driven by a common drive.
  • the lubricant level above the shaft 14 can not lead to loss of lubricant via the overboard vent line 20.
  • a grid or honeycomb structure may be arranged to prevent flashback into the lubricant tank 11.
  • the overboard vent line 20 may be associated with a pressure regulating valve.
  • the rotary lubricant separator 19 and the lubricant pump 16 for removing the lubricant from the lubricant tank 11 are mounted on a common shaft 14 and driven by a common drive via this shaft 14, this drive also driving the blades 12 also mounted on the shaft 14 serves.
  • the lubricant separator 19 is positioned above a partition wall of the lubricant tank 11.
  • Fig. 4 shows the not belonging to the invention assembly of a lubricant system, where at a correspondingly high pressure on the wall 13 of the lubricant tank 11 at a high speed of the blades 12 and thus of the voltage applied to the wall 13 lubricant ring on the lubricant pump 16 for removing the lubricant from the lubricant tank 11 is omitted, the lubricant flow can then be controlled by a corresponding pressure control valve 25.
  • the rotating lubricant separator 19 in the exemplary embodiment of FIG 3 and 4 positioned above the level of standing at standing shaft 14 in the lubricant tank 11 forming, stationary oil level.
  • the lubricant system according to the invention is preferably used in a gas turbine aircraft engine. It should be noted that, however, other applications of the in the Fig. 1 to 4 shown assemblies are possible. Thus, they can be used in lubricant systems of a stationary gas turbine or in lubricant systems of marine turbines. Also, the lubricant system of lubrication of electric generators, electric motors and piston engines for aircraft, ships, land vehicles or serve for stationary applications. Further, application in a hydraulic system or any other fluid circuit system is possible, particularly in those applications where acceleration vectors are variable or weightlessness occurs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Lubricants (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention relates to a lubrication system, in particular, for a supplying a lubricant to a user in a gas turbine aircraft engine, comprising a lubricant tank (11). A lubricant can be offset in rotation in the lubricant tank (11) by means of at least one rotatable drum which is integrated therein or by means of at least one rotatable blade (12) which is integrated therein, such that the lubricant arrives on a rotationally symmetrical wall (13) of the lubricant tank (11), due to flowing forces, and can be guided in the direction of a user. Said lubricating system also comprises a drive for the or each rotatable drum or the or each rotatable blade (12) of the lubricant tank (11), and at least one rotating lubricant separator (19) which is used to ventilate the lubricant. According to the invention, the or each lubricant separator (19) can be driven by the drive of the or each rotatable drum and/or the or each rotatable blade (12) of the lubricant tank (11).

Description

Die Erfindung betrifft ein Schmiermittelsystem nach dem Oberbegriff des Anspruchs 1.The invention relates to a lubricant system according to the preamble of claim 1.

Aus der Praxis bekannte Schmiermittelsysteme zur Schmiermittelversorgung eines Verbrauchers umfassen neben einem Schmiermitteltank mindestens eine Schmiermittelpumpe zur Entnahme des Schmiermittels aus dem Schmiermitteltank sowie zur Förderung des Schmiermittels in Richtung auf den Verbraucher, und weiterhin mindestens eine Schmiermittelpumpe zur Rückführung des Schmiermittels vom Verbraucher in den Schmiermitteltank. Im Schmiermitteltank ist üblicherweise ein statischer Schmiermittelabscheider integriert, um aus dem in dem Schmiermitteltank zurückgeförderten Gemisch aus Schmiermittel und Luft die Luft vom Schmiermittel zu trennen und aus dem Schmiermitteltank abzuleiten. Die aus dem Schmiermitteltank abzuführende Luft sowie Entlüftungsluft des Verbrauchers werden üblicherweise einem rotierenden Schmiermittelabscheider zugeführt, wobei die hierbei separierte Luft vom rotierenden Schmiermittelabscheider über eine sogenannte Überbord-Entlüftungsleitung aus dem Schmiermittelsystem abgeleitet wird. Neben dem Schmiermitteltank, den Schmiermittelpumpen sowie den Schmiermittelabscheidern umfassen aus der Praxis bekannte Schmiermittelsysteme zur Schmiermittelversorgung eines Verbrauchers weiterhin Schmiermittelfilter sowie Schmiermittelkühler, die zwischen den Schmiermitteltank und den Verbraucher geschaltet sind.Lubricant systems known from practice for supplying lubricant to a consumer comprise, in addition to a lubricant tank, at least one lubricant pump for removing the lubricant from the lubricant tank and for conveying the lubricant in the direction of the consumer, and at least one lubricant pump for returning the lubricant from the consumer to the lubricant tank. In the lubricant tank, a static lubricant separator is usually integrated in order to separate the air from the lubricant and to discharge it from the lubricant tank from the mixture of lubricant and air conveyed back into the lubricant tank. The discharged from the lubricant tank air and venting air of the consumer are usually supplied to a rotating lubricant, wherein the case separated air is derived from the rotating lubricant separator via a so-called overboard vent line from the lubricant system. In addition to the lubricant tank, the lubricant pumps and the lubricant separators include known from practice lubricant systems for supplying lubricant to a consumer lubricant filter and lubricant cooler, which are connected between the lubricant tank and the consumer.

Bei Schmiermittelsystemen, die zum Beispiel der Schmiermittelversorgung eines Verbrauchers in einem Gasturbinenflugtriebwerk dienen, ist es von Bedeutung, dass auch bei extremen Flugbedingungen die Schmiermittelversorgung aufrecht erhalten wird. Dies ist insbesondere bei extremen Flugmanövern wie Rückenflug, Parabelflug mit Schwerelosigkeit oder negativem Beschleunigungsvektor sowie extremen Steigflug bzw. extremen Sinkflug problematisch. Um in diesen Fällen die Schmiermittelversorgung aufrecht zu erhalten, kommt in solchen Schmiermittelsystemen üblicherweise ein Schmiermitteltank zum Einsatz, in welchem das Schmiermittel durch Rotation mindestens einer in den Schmiermitteltank integrierten Trommel oder durch Rotation mindestens einer in den Schmiermitteltank integrierten Schaufel in Rotation versetzt wird. Bei einer derartigen Rotation kommt das Schmiermittel aufgrund von Fliehkräften bzw. Zentrifugalkräften an einer rotationssymmetrischen Wand des Schmiermitteltanks zur Anlage und kann von dort in Richtung auf den Verbraucher gefördert werden. Luft wird auf diese Art und Weise aus dem Schmiermittel auszentrifugiert und sammelt sich in der Mitte des Schmiermitteltanks, von wo aus die auszentrifugierte Luft aus dem Schmiermitteltank abgefördert werden kann. In diesem Fall kann auf einen in den Schmiermitteltank integrierten, statischen Ölabscheider verzichtet werden. Schmiermittelsysteme mit einem solchen Schmiermitteltank sind zum Beispiel aus der DE 30 50 765 C2 sowie aus der DE 34 05 366 C2 bekannt.In lubricant systems, for example, serving the lubricant supply of a consumer in a gas turbine aircraft engine, it is important that even in extreme flight conditions, the lubricant supply is maintained. This is particularly problematic in extreme flight maneuvers such as inverted flight, parabolic flight with weightlessness or negative acceleration vector and extreme climb or extreme descent. In order to maintain the supply of lubricant in these cases, such lubricant systems usually employ a lubricant tank in which the lubricant is set in rotation by rotation of at least one drum integrated into the lubricant tank or by rotation of at least one blade integrated in the lubricant tank. In such a rotation, the lubricant due to centrifugal forces or centrifugal forces on a rotationally symmetrical wall of the lubricant tank to the plant and can be promoted from there in the direction of the consumer. Air is thus centrifuged out of the lubricant and accumulates in the middle of the lubricant tank, from where it is centrifuged out Air can be removed from the lubricant tank. In this case, it is possible to dispense with a static oil separator integrated in the lubricant tank. Lubricant systems with such a lubricant tank are, for example, from DE 30 50 765 C2 as well as from the DE 34 05 366 C2 known.

Aus den Dokumenten EP 0 151 968 A2 , US-A-4 049 401 und DE 30 47 719 A1 sind Schmiermittelsysteme mit Tanks bekannt, deren Inhalt mit Hilfe von drehbaren Schaufeln bzw. Trommeln in Rotation versetzt wird. Die Schmiermittelsysteme weisen rotierende Schmiermittelabscheider sowie entsprechende Pumpen für die Schmiermittelförderung vom und zum Tank auf. Zur Vereinfachung des Antriebs der rotierenden Elemente ist z.B. vorgesehen, die Schaufeln bzw. Trommeln sowie die Schmiermittelabscheider auf gemeinsame wellen zu setzen und mit oder ohne Getriebeübersetzung gemeinsam anzutreiben. Es ist auch vorgesehen, die Pumpen aus dem selben Antrieb mit Leistung zu versorgen.From the documents EP 0 151 968 A2 . U.S.-A-4,049,401 and DE 30 47 719 A1 are known lubricant systems with tanks whose content is rotated by means of rotatable blades or drums in rotation. The lubricant systems have rotating lubricant separators as well as appropriate pumps for lubricant delivery to and from the tank. To simplify the drive of the rotating elements is provided, for example, to put the blades or drums and the lubricant on common shafts and drive together with or without gear ratio. It is also intended to power the pumps from the same drive.

Das Dokument WO 00/79103 A1 betrifft ein Ölsystem für eine Gasturbine, bei dem die ölpumpen mit hydraulischer Energie aus dem Treibstoffsystem angetrieben werden.The document WO 00/79103 A1 relates to an oil system for a gas turbine in which the oil pumps with hydraulic energy from the fuel system are driven.

Hiervon ausgehend liegt der vorliegenden Erfindung das Problem zu Grunde, ein noch einfacheres, zuverlässigeres Schmiermittelsystem zu schaffen.On this basis, the present invention based on the problem to provide an even simpler, more reliable lubricant system.

Dieses Problem wird durch ein Schmiermittelsystem gemäß Anspruch 1 gelöst. Dabei sind der oder jeder rotierende Schmiermittelabscheider sowie die drehend anzutreibenden Elemente des Schmiermitteltanks, nämlich die oder jede Trommel bzw. die oder jede Schaufel, auf einer gemeinsamen Welle gelagert und von dem gemeinsamen Antrieb aus, gegebenenfalls unter Zwischenschaltung eines Getriebes, antreibbar. Weiterhin ist mindestens eine Schmiermittelpumpe zur Entnahme des Schmiermittels aus dem Schmiermitteltank und zur Förderung des Schmiermittels in Richtung auf den Verbraucher vom Antrieb der oder jeder drehbaren Trommel bzw. der oder jeder drehbaren Schaufel des Schmiermitteltanks antreibbar.This problem is solved by a lubricant system according to claim 1. In this case, the or each rotating lubricant separator and the elements of the lubricant tank to be driven in rotation, namely the or each drum or the or each blade, are mounted on a common shaft and driven by the common drive, optionally with the interposition of a transmission. Furthermore, at least one lubricant pump for removing the lubricant from the lubricant tank and for conveying the lubricant in the direction of the consumer from the drive of the or each rotatable drum or the or each rotatable blade of the lubricant tank can be driven.

Erfindungsgemäß sind der oder jeder rotierende Schmiermittelabscheider und die oder jede Schmiermittelpumpe zur Entnahme des Schmiermittels aus dem Schmiermitteltank sowie die oder jede drehbare Trommel bzw. die oder jede drehbare Schaufel auf einer gemeinsamen Welle gelagert und über die Welle entweder direkt oder indirekt unter Zwischenschaltung eines Getriebes antreibbar.According to the invention, the or each rotating lubricant separator and the or each lubricant pump for removing the lubricant from the lubricant tank and the or each rotatable drum or the or each rotatable blade are mounted on a common shaft and driven via the shaft either directly or indirectly with the interposition of a transmission ,

Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ausführungsbeispiele der Erfindung werden, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt:

Fig. 1
eine schematisierte Darstellung einer erfindungsgemäßen Baugrup- pe eines erfindungsgemäßen Schmiermittelsystems nach einem ers- ten Ausführungsbeispiel der Erfindung;
Fig. 2
eine schematisierte Darstellung einer erfindungsgemäßen Baugrup- pe eines erfindungsgemäßen Schmiermittelsystems nach einem zwei- ten Ausführungsbeispiel der Erfindung;
Fig. 3
eine schematisierte Darstellung einer erfindungsgemäßen Baugrup- pe eines erfindungsgemäßen Schmiermittelsystems nach einem drit- ten Ausführungsbeispiel der Erfindung; und
Fig. 4
eine schematisierte Darstellung einer Baugrup- pe eines Schmiermittelsystems
Preferred embodiments of the invention will become apparent from the dependent claims and the description below. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:
Fig. 1
a schematic representation of an inventive assembly of a lubricant system according to the invention according to a first embodiment of the invention;
Fig. 2
a schematic representation of an inventive assembly of a lubricant system according to the invention according to a second embodiment of the invention;
Fig. 3
a schematic representation of an inventive assembly of a lubricant system according to the invention according to a third embodiment of the invention; and
Fig. 4
a schematic representation of an assembly of a lubricant system

Nachfolgend wird die Erfindung unter Bezugnahme auf Fig. 1 bis 4 in größerem Detail beschrieben.Hereinafter, the invention with reference to Fig. 1 to 4 described in more detail.

Fig. 1 zeigt eine schematisierte Darstellung einer erfindungsgemäßen Baugruppe 10 eines erfindungsgemäßen Schmiermittelsystems nach einem ersten Ausführungsbeispiel der hier vorliegenden Erfindung. Die in Fig. 1 dargestellte Baugruppe 10 umfasst einen Schmiermitteltank 11, wobei in den Schmiermitteltank 11 rotierende Schaufeln 12 integriert sind, um das in dem Schmiermitteltank 11 befindliche Schmiermittel in Rotation zu versetzen. Hierbei bildet sich an einer rotationssymmetrischen Wand 13 des Schmiermitteltanks 11 ein Schmiermittelring aus, wobei aufgrund der auf das Schmiermittel wirkenden Zentrifugalkräfte Luft aus dem Schmiermittel auszentrifugiert wird. Die rotatorisch antreibbaren Schaufeln 12 sind auf einer Welle 14 gelagert und über einen nicht-dargestellten Antrieb von der Welle 14 aus antreibbar. Im gezeigten Ausführungsbeispiel ist die rotationssymmetrische Wand 13 des Schmiermitteltanks 11 in Form eines Kegelstumpfes ausgeführt, wobei das Schmiermittel in einem Abschnitt 15 der Wand 13 mit Hilfe einer Schmiermittelpumpe 16 aus dem Schmiermitteltank 11 entnommen und in Richtung auf einen nicht dargestellten Verbraucher gefördert werden kann. Neben der Schmiermittelpumpe 16 zur Entnahme des Schmiermittels aus dem Schmiermitteltank 11 zeigt Fig. 1 weiterhin zwei Schmiermittelpumpen 17 und 18, welche der Rückführung des Schmiermittels ausgehend vom Verbraucher in den Schmiermitteltank 11 dienen. Von den Schmiermittelpumpen 17 und 18 wird ein Gemisch aus Schmiermittel und Luft in den Schmiermitteltank 11 zurückgeführt, wobei die Luft durch die Rotation der in den Schmiermitteltank 11 integrierten Schaufeln 12 und durch die Ausbildung des Schmiermittelrings an der Wand 13 des Schmiermitteltanks 11 aus dem Schmiermittel auszentrifugiert wird. Die Luft sammelt sich in einem mittleren Abschnitt des Schmiermitteltanks 11 und wird vor Ausleitung aus dem Schmiermitteltank 11 über einen rotierenden Schmiermittelabscheider 19 geführt. Nach Passieren des rotierenden Schmiermittelabscheiders 19 wird die vom Schmiermittel getrennte Luft über eine sogenannte Überbord-Entlüftungsleitung 20 abgeführt. Fig. 1 shows a schematic representation of an inventive assembly 10 of a lubricant system according to the invention according to a first embodiment of the present invention. In the Fig. 1 illustrated assembly 10 includes a lubricant tank 11, wherein in the lubricant tank 11 rotating blades 12 are integrated to enable the lubricant in the lubricant tank 11 located in rotation lubricant. Here, a lubricant ring is formed on a rotationally symmetrical wall 13 of the lubricant tank 11, wherein due to the centrifugal forces acting on the lubricant, air is centrifuged out of the lubricant. The rotatably drivable blades 12 are mounted on a shaft 14 and driven by a non-illustrated drive from the shaft 14 from. In the illustrated embodiment, the rotationally symmetrical wall 13 of the lubricant tank 11 is designed in the form of a truncated cone, wherein the lubricant can be removed in a portion 15 of the wall 13 by means of a lubricant pump 16 from the lubricant tank 11 and conveyed in the direction of a consumer, not shown. In addition to the lubricant pump 16 for removing the lubricant from the lubricant tank 11 shows Fig. 1 Furthermore, two lubricant pumps 17 and 18, which serve to return the lubricant from the consumer into the lubricant tank 11. From the lubricant pumps 17 and 18, a mixture of lubricant and air is returned to the lubricant tank 11, the air being centrifuged out of the lubricant by the rotation of the blades 12 integrated in the lubricant tank 11 and by the formation of the lubricant ring on the wall 13 of the lubricant tank 11 becomes. The air collects in a central portion of the lubricant tank 11 and is guided before being discharged from the lubricant tank 11 via a rotating lubricant separator 19. After passing through the rotating Schmiermittelabscheiders 19, the separated air from the lubricant via a so-called overboard vent line 20 is discharged.

Im Sinne der hier vorliegenden Erfindung sind die in Fig. 1 dargestellten Komponenten eines Schmiermittelsystems zu einer Baugruppe 10 zusammengefasst. Der rotierende Schmiermittelabscheider 19 ist vom Antrieb der rotierenden Schaufeln 12 aus antreibbar und hierzu auf derselben Welle 14 gelagert wie die Schaufeln 12. Ebenso ist die Schmiermittelpumpe 16 zur Entnahme des Schmiermittels aus dem Schmiermitteltank 11 vom Antrieb der Schaufeln 12 aus antreibbar. Weiterhin sind die Schmiermittelpumpen 17 und 18, die der Rückführung des Schmiermittels in den Schmiermitteltank 11 dienen, von dem Antrieb der Schaufeln 12 aus antreibbar. Hierzu sind die Schmiermittelpumpen 16, 17 und 18 ebenso wie der rotierende Schmiermittelabscheider 19 auf der Welle 14 gelagert, auf welcher auch die in den Schmiermitteltank 11 integrierten Schaufeln 12 gelagert sind. Im Sinne der Erfindung werden demnach alle anzutreibenden Komponenten der Baugruppe 10, also die Schaufeln 12, der rotierende Schmiermittelabscheider 19 sowie die Schmiermittelpumpen 16, 17, 18 von einem einzigen Antrieb aus angetrieben, und zwar entweder unmittelbar oder mittelbar unter Zwischenschaltung eines entsprechenden Getriebes. Durch die Zwischenschaltung eines Getriebes zwischen die Welle 14 und die jeweilige anzutreibende Komponente ist es möglich, die Schaufeln 12, den rotierenden Schmiermittelabscheider 19 sowie die Schmiermittelpumpen 16, 17 und 18 mit individuellen Drehzahlen anzutreiben. Im Ausführungsbeispiel der Fig. 1 ist der rotierende Schmiermittelabscheider 19 in den Schmiermitteltank 11 integriert, die Schmiermittelpumpen 16, 17 und 18 sind hingegen außerhalb des Schmiermitteltanks 11 positioniert.For the purposes of the present invention, the in Fig. 1 shown components of a lubricant system combined to form an assembly 10. The rotating lubricant separator 19 can be driven by the drive of the rotating blades 12 and, for this purpose, on the same shaft 14 Likewise, the lubricant pump 16 for removing the lubricant from the lubricant tank 11 from the drive of the blades 12 driven. Furthermore, the lubricant pumps 17 and 18, which serve to return the lubricant in the lubricant tank 11, driven by the drive of the blades 12 from. For this purpose, the lubricant pumps 16, 17 and 18 as well as the rotating lubricant separator 19 are mounted on the shaft 14, on which also the integrated into the lubricant tank 11 blades 12 are mounted. According to the invention, therefore, all components of the assembly 10 to be driven, ie the blades 12, the rotating lubricant separator 19 and the lubricant pumps 16, 17, 18 driven by a single drive, either directly or indirectly with the interposition of a corresponding transmission. By the interposition of a transmission between the shaft 14 and the respective component to be driven, it is possible to drive the blades 12, the rotating lubricant separator 19 and the lubricant pumps 16, 17 and 18 with individual speeds. In the embodiment of Fig. 1 For example, the rotary lubricant separator 19 is integrated with the lubricant tank 11, and the lubricant pumps 16, 17, and 18 are positioned outside the lubricant tank 11.

Die Baugruppe 10 des Ausführungsbeispiels der Fig. 1 zeichnet sich durch eine kompakte Bauform aus und kann als sogenannte Line Replaceable Unit (LRU) ausgeführt werden. Hierdurch ist es möglich, bei Wartungsarbeiten eines Schmiermittelsystems die Baugruppe 10 als Einheit auszutauschen. Auch unter extremen Betriebsbedingungen, wie zum Beispiel bei negativen Beschleunigungsvektoren oder bei extremen Flugmanövern, kann mit Hilfe der in Fig. 1 dargestellten Baugruppe eine kontinuierliche Versorgung eines Verbrauchers mit Schmiermittel gewährleistet werden. Die Baugruppe 10 kann derart in ein Gasturbinenflugtriebwerk eingebaut werden, dass sich die Welle 14, auf welcher die Schaufeln 12, der rotierende Schmiermittelabscheider 19 sowie die Schmiermittelpumpen 16, 17 und 18 gelagert sind, entweder in Längsrichtung oder in Querrichtung zu einer Triebwerksachse erstreckt. Die Welle 14 kann elektrisch, hydrostatisch, hydrodynamisch oder auch pneumatisch angetrieben werden. Auch ist es möglich, die Welle 14 über eine Triebwerks-Hauptwelle unter Zwischenschaltung eines Getriebes mechanisch anzutreiben.The assembly 10 of the embodiment of Fig. 1 is characterized by a compact design and can be designed as a so-called Line Replaceable Unit (LRU). This makes it possible to replace the assembly 10 as a unit during maintenance of a lubricant system. Even under extreme operating conditions, such as in negative acceleration vectors or in extreme maneuvers, with the help of in Fig. 1 represented assembly a continuous supply of a consumer with lubricant can be ensured. The assembly 10 may be installed in a gas turbine aircraft engine such that the shaft 14 on which the blades 12, rotary lubricant separator 19, and lubricant pumps 16, 17, and 18 are mounted extend either longitudinally or transversely to an engine axis. The shaft 14 can be driven electrically, hydrostatically, hydrodynamically or pneumatically. It is also possible to mechanically drive the shaft 14 via an engine main shaft with the interposition of a transmission.

Fig. 2 zeigt eine Baugruppe 21 für ein erfindungsgemäßes Schmiermittelsystem nach einem zweiten Ausführungsbeispiel der Erfindung, wobei die Baugruppe 21 der Fig. 2 über dieselben Komponenten verfügt wie die Baugruppe 10 der Fig. 1. Zur Vermeidung unnötiger Wiederholung werden daher für gleiche Baugruppen gleiche Bezugsziffern verwendet. Die Baugruppe 21 der Fig. 2 unterscheidet sich von der Baugruppe 10 der Fig. 1 dadurch, dass in der Baugruppe 21 der Fig. 2 auch die Pumpeneinheit umfassend die Schmiermittelpumpen 16, 17 und 18 in den Schmiermitteltank 11 integriert ist. Hierdurch kann die Bauform abermals reduziert werden. Die Schaufeln 12, der rotierende Schmiermittelabscheider 19 sowie die Schmiermittelpumpen 16, 17 und 18 sind wiederum auf einer gemeinsamen Welle 14 gelagert und werden von einem gemeinsamen Antrieb aus angetrieben. Hinsichtlich dieser Details kann auf die Ausführungen zur Baugruppe 10 der Fig. 1 verwiesen werden. Fig. 2 kann entnommen werden, dass die Überbord-Entlüftungsleitung 20 gegenüber der rotierenden Welle 14 über eine Dichtung 22 abgedichtet ist. Eine derartige Dichtung kann auch bei der Baugruppe 10 der Fig. 1 vorhanden sein. Fig. 2 shows an assembly 21 for a lubricant system according to the invention according to a second embodiment of the invention, wherein the assembly 21 of the Fig. 2 has the same components as the assembly 10 of Fig. 1 , Therefore, to avoid unnecessary repetition for identical components same reference numerals used. The module 21 of Fig. 2 differs from the assembly 10 of Fig. 1 in that in the assembly 21 of the Fig. 2 Also, the pump unit comprising the lubricant pumps 16, 17 and 18 is integrated in the lubricant tank 11. As a result, the design can be reduced again. The blades 12, the rotating lubricant separator 19 and the lubricant pumps 16, 17 and 18 are in turn mounted on a common shaft 14 and are driven by a common drive. With regard to these details, the comments on the assembly 10 of the Fig. 1 to get expelled. Fig. 2 it can be seen that the overboard vent line 20 is sealed from the rotating shaft 14 via a seal 22. Such a seal can also in the assembly 10 of the Fig. 1 to be available.

In den Ausführungsbeispielen der Fig. 1 und 2 wird die Überbord-Entlüftungsleitung 20 vorzugsweise soweit nach oben geführt, dass bei statischen Verhältnissen im Schmiermitteltank 11, der über der Welle 14 liegende Spiegel des Schmiermittels nicht zu einem Schmiermittelverlust über die Überbord-Entlüftungsleitung 20 führen kann. Am Ende der Überbord-Entlüftungsleitung 20 kann ein Gitter oder eine Wabenstruktur angeordnet sein, um einen Flammrückschlag in den Schmiermitteltank 11 zu vermeiden. In dem Fall, in dem ein erhöhter Druck innerhalb des Schmiermitteltanks 11 erwünscht ist, kann der Überbord-Entlüftungsleitung 20 ein Druckregelventil zugeordnet sein.In the embodiments of the Fig. 1 and 2 For example, in the case of static conditions in the lubricant tank 11, the lubricant level above the shaft 14 can not lead to loss of lubricant via the overboard vent line 20. At the end of the overboard vent line 20, a grid or honeycomb structure may be arranged to prevent flashback into the lubricant tank 11. In the case where increased pressure within the lubricant tank 11 is desired, the overboard vent line 20 may be associated with a pressure regulating valve.

In den Ausführungsbeispielen der Fig. 1 und 2 erstreckt sich die Welle 14 in horizontaler Richtung. Fig. 3 und 4 hingegen zeigen Ausführungsbeispiele von Baugruppen 23 und 24 mit einer vertikal verlaufenden Welle 14, wobei bei diesen Baugruppen 23 und 24 das Schmiermittel durch Schwerkraft zurück in den Schmiermitteltank 11 fließt, weshalb auf die Schmiermittelpumpen 17 und 18 zur Rückführung des Schmiermittels in den Schmiermitteltank 11 verzichtet werden kann.In the embodiments of the Fig. 1 and 2 the shaft 14 extends in the horizontal direction. 3 and 4 In contrast, embodiments of assemblies 23 and 24 with a vertically extending shaft 14, wherein in these assemblies 23 and 24, the lubricant flows by gravity back into the lubricant tank 11, which is why the lubricant pumps 17 and 18 are dispensed to return the lubricant in the lubricant tank 11 can.

Im Ausführungsbeispiel der Fig. 3 sind der rotierende Schmiermittelabscheider 19 sowie die Schmiermittelpumpe 16 zur Entnahme des Schmiermittels aus dem Schmiermitteltank 11 auf einer gemeinsamen Welle 14 gelagert und über diese Welle 14 von einem gemeinsamen Antrieb aus antreibbar, wobei dieser Antrieb auch dem Antrieb der ebenfalls auf der Welle 14 gelagerten Schaufeln 12 dient. Gemäß Fig. 3 ist der Schmiermittelabscheider 19 oberhalb einer Trennwand des Schmiermitteltanks 11 positioniert.In the embodiment of Fig. 3 the rotary lubricant separator 19 and the lubricant pump 16 for removing the lubricant from the lubricant tank 11 are mounted on a common shaft 14 and driven by a common drive via this shaft 14, this drive also driving the blades 12 also mounted on the shaft 14 serves. According to Fig. 3 For example, the lubricant separator 19 is positioned above a partition wall of the lubricant tank 11.

Fig. 4 zeigt die nicht zur Erfindung gehörende Baugruppe eines Schmiermittelsystems, wo bei einem entsprechend hohen Druck an der Wand 13 des Schmiermitteltanks 11 bei einer hohen Drehzahl der Schaufeln 12 und damit des an der Wand 13 anliegenden Schmiermittelrings auf die Schmiermittelpumpe 16 zur Entnahme des Schmiermittels aus dem Schmiermitteltank 11 verzichtet wird, wobei der Schmiermittelfluss dann durch ein entsprechendes Druckregelventil 25 geregelt werden kann. Fig. 4 shows the not belonging to the invention assembly of a lubricant system, where at a correspondingly high pressure on the wall 13 of the lubricant tank 11 at a high speed of the blades 12 and thus of the voltage applied to the wall 13 lubricant ring on the lubricant pump 16 for removing the lubricant from the lubricant tank 11 is omitted, the lubricant flow can then be controlled by a corresponding pressure control valve 25.

Um Schmiermittelverluste bei stehender Welle 14 zu vermeiden, ist der rotierende Schmiermittelabscheider 19 im Ausführungsbeispiel der Fig. 3 und 4 über dem Niveau des sich bei stehender Welle 14 im Schmiermitteltank 11 ausbildenden, stationären Ölspiegels positioniert.To avoid lubricant losses when the shaft 14 is stationary, the rotating lubricant separator 19 in the exemplary embodiment of FIG 3 and 4 positioned above the level of standing at standing shaft 14 in the lubricant tank 11 forming, stationary oil level.

Das erfindungsgemäße Schmiermittelsystem findet vorzugsweise Verwendung in einem Gasturbinenflugtriebwerk. Es sei darauf hingewiesen, dass jedoch auch andere Anwendungsfälle der in den Fig. 1 bis 4 dargestellten Baugruppen möglich sind. So können dieselben in Schmiermittelsystemen einer stationären Gasturbine oder in Schmiermittelsystemen von Schiffsturbinen zum Einsatz kommen. Auch kann das Schmiermittelsystem der Schmierung von elektrischen Generatoren, Elektromotoren sowie Kolbenmotoren für Flugzeuge, Schiffe, Landfahrzeuge oder auch für stationäre Anwendungen dienen. Ferner ist eine Anwendung in einem Hydrauliksystem oder jedem anderen System mit einem Flüssigkeitskreislauf möglich, und zwar insbesondere bei solchen Anwendungen, in welchen Beschleunigungsvektoren variabel sind oder Schwerelosigkeit auftritt.The lubricant system according to the invention is preferably used in a gas turbine aircraft engine. It should be noted that, however, other applications of the in the Fig. 1 to 4 shown assemblies are possible. Thus, they can be used in lubricant systems of a stationary gas turbine or in lubricant systems of marine turbines. Also, the lubricant system of lubrication of electric generators, electric motors and piston engines for aircraft, ships, land vehicles or serve for stationary applications. Further, application in a hydraulic system or any other fluid circuit system is possible, particularly in those applications where acceleration vectors are variable or weightlessness occurs.

Claims (10)

  1. A lubrication system, in particular for the supply of lubricant to a load in a gas-turbine aircraft engine, having a lubricant tank (11), wherein in the lubricant tank (11) a lubricant can be set rotating by means of at least one rotatable drum integrated in the same or by means of at least one rotatable blade (12) integrated in the same, in such a way that on account of centrifugal forces the lubricant comes into contact with a rotationally symmetrical wall (13) of the lubricant tank (11) and from there can be conveyed in the direction of a load, having a drive for the or each rotatable drum or for the or each rotatable blade (12) of the lubricant tank (11), and having at least one rotating lubricant separator (19) for de-aerating the lubricant, wherein the or each lubricant separator (19) can be driven by the drive of the or each rotatable drum or of the or each rotatable blade (12) of the lubricant tank (11), wherein the or each rotating lubricant separator (19) and also the or each rotatable drum or the or each rotatable blade (12) are mounted on a common shaft (14) and can be driven by way of the shaft (14) either directly and/or indirectly with interconnection of a gear unit, and wherein at least one lubricant pump (16) can be driven by the drive of the or each rotatable drum or of the or each rotatable blade (12) of the lubricant tank (11) for the removal of the lubricant from the lubricant tank (11) and for the conveyance of the lubricant in the direction of the load,
    characterised in that
    the or each lubricant pump (16) is mounted on the shaft (14), on which the or each lubricant separator (19) and also the or each rotatable drum or the or each rotatable blade (12) are mounted, and can be driven by way of the shaft (14) either directly and/or indirectly with interconnection of a gear unit.
  2. A lubrication system according to claim 1,
    characterised in that
    the or each rotating lubricant separator (19) is integrated in the lubricant tank (11).
  3. A lubrication system according to claim 1 or 2,
    characterised in that
    the or each lubricant pump (16) is integrated in the lubricant tank (11).
  4. A lubrication system according to one of claims 1 to 3,
    characterised in that
    at least one lubricant pump (17, 18) can be driven by the drive of the or each rotatable drum or of the or each rotatable blade (12) of the lubricant tank (11) to feed the lubricant back into the lubricant tank (11).
  5. A lubrication system according to claim 4,
    characterised in that
    the or each lubricant pump (17, 18) is mounted on the shaft (14), on which the or each lubricant separator (19) and also the or each rotatable drum or the or each rotatable blade (12) are mounted, and can be driven by way of the shaft (14) either directly and/or indirectly with interconnection of a gear unit.
  6. A lubrication system according to claim 4 or 5,
    characterised in that
    the or each lubricant pump (17, 18) is integrated in the lubricant tank (11).
  7. A lubrication system according to one of claims 1 to 6,
    characterised in that
    the shaft (14) extends horizontally.
  8. A lubrication system according to one of claims 1 to 6,
    characterised in that
    the shaft (14) extends vertically.
  9. A lubrication system according to claim 8,
    characterised in that
    the lubricant separator (19) is arranged above a dividing wall of the lubricant tank (11).
  10. A lubrication system according to claim 8 or 9,
    characterised in that
    the lubricant flows back into the lubricant tank (11) by means of gravitational force without pumping.
EP06761720A 2005-07-07 2006-06-29 Lubrication system Ceased EP1899583B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005031804A DE102005031804A1 (en) 2005-07-07 2005-07-07 lubricant system
PCT/DE2006/001116 WO2007006253A1 (en) 2005-07-07 2006-06-29 Lubrication system

Publications (2)

Publication Number Publication Date
EP1899583A1 EP1899583A1 (en) 2008-03-19
EP1899583B1 true EP1899583B1 (en) 2011-08-24

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EP06761720A Ceased EP1899583B1 (en) 2005-07-07 2006-06-29 Lubrication system

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US (1) US8807282B2 (en)
EP (1) EP1899583B1 (en)
DE (1) DE102005031804A1 (en)
WO (1) WO2007006253A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102007058954A1 (en) 2007-12-07 2009-06-10 Rolls-Royce Deutschland Ltd & Co Kg Gas turbine oil supply system and method of operating a gas turbine bearing oil supply
DE102008009822A1 (en) * 2008-02-19 2009-08-20 Rolls-Royce Deutschland Ltd & Co Kg Gas turbine bearing oil system with improved oil return
EP2199614B1 (en) * 2008-12-22 2016-09-28 Safran Aero Boosters SA Combined pumping and separation machine for the oil circuit of a jet engine
US10851941B2 (en) * 2017-12-04 2020-12-01 Rolls-Royce Corporation Lubrication and scavenge system
US10851689B2 (en) * 2018-06-13 2020-12-01 Rolls-Royce Corporation Drainage path for a bearing sump in a vertically oriented turbine engine

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US2888097A (en) * 1957-07-12 1959-05-26 Westinghouse Electric Corp Lubrication system
US3415383A (en) * 1966-02-23 1968-12-10 Gen Electric Centrifugal separator
US3906717A (en) * 1974-03-21 1975-09-23 Gen Motors Corp Turbine engine oil sump emission control
GB1508212A (en) * 1975-02-10 1978-04-19 Rolls Royce Apparatus for separating suspension of liquids in gas
DE3050765C2 (en) 1980-12-18 1985-07-18 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Device for venting a liquid container, in particular an oil tank, taking into account extreme flight positions and conditions
DE3047719C2 (en) 1980-12-18 1983-10-27 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Device for venting a liquid container, in particular a lubricant container for aircraft in extreme flight positions and conditions
DE3405366A1 (en) 1984-02-15 1985-08-22 MTU Motoren- und Turbinen-Union München GmbH, 8000 München LUBRICANT SUPPLY SYSTEM
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GB0206243D0 (en) * 2002-03-16 2002-05-01 Rolls Royce Plc An air/oil separator

Also Published As

Publication number Publication date
US20080217105A1 (en) 2008-09-11
WO2007006253A1 (en) 2007-01-18
US8807282B2 (en) 2014-08-19
EP1899583A1 (en) 2008-03-19
DE102005031804A1 (en) 2007-01-18

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