EP2196635A2 - Device for avoiding high oil tank pressures under negative g conditions - Google Patents

Device for avoiding high oil tank pressures under negative g conditions Download PDF

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Publication number
EP2196635A2
EP2196635A2 EP20090010617 EP09010617A EP2196635A2 EP 2196635 A2 EP2196635 A2 EP 2196635A2 EP 20090010617 EP20090010617 EP 20090010617 EP 09010617 A EP09010617 A EP 09010617A EP 2196635 A2 EP2196635 A2 EP 2196635A2
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EP
European Patent Office
Prior art keywords
oil tank
oil
conditions
tank
breather
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
EP20090010617
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German (de)
French (fr)
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EP2196635A3 (en
EP2196635B1 (en
Inventor
Robert Dr. Angst
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Rolls Royce Deutschland Ltd and Co KG
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Rolls Royce Deutschland Ltd and Co KG
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Publication of EP2196635A2 publication Critical patent/EP2196635A2/en
Publication of EP2196635A3 publication Critical patent/EP2196635A3/en
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Publication of EP2196635B1 publication Critical patent/EP2196635B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/06—Means for keeping lubricant level constant or for accommodating movement or position of machines or engines
    • F01M11/062—Accommodating movement or position of machines or engines, e.g. dry sumps
    • F01M11/065—Position
    • F01M11/067—Position inverted, e.g. for inverted flight
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86348—Tank with internally extending flow guide, pipe or conduit

Definitions

  • the invention relates to a device for avoiding high oil tank pressures under negative g conditions, and more particularly to an aircraft gas turbine oil tank according to the features of the preamble of claim 1.
  • the invention relates to an oil tank having a breather outlet pipe branched from an upper portion of the oil tank and connected to a breather, and a breather connection pipe connected to a lower portion of the tank.
  • breath pressure loss increases due to the blockage or blockage of the deaerator with oil. This leads to oil spills, contamination of bleed air, smell of oil in the aircraft cabin and sealing problems in the storage chambers of an aircraft gas turbine.
  • the invention has for its object to provide an aircraft gas turbine oil tank of the type described above, which has a high level of reliability with a simple design and simple, cost manufacturability and in particular is functional under negative g conditions.
  • an air duct is arranged in the upper region of the oil tank. This is open on both sides and extends into the breather outlet pipe, in which it protrudes and the other end of the air duct opens in the central region of the oil tank.
  • the inventive design prevents a high pressure in the oil tank results in negative g conditions.
  • the air duct pressure equalization takes place between the breather outlet pipe (the vent line of the oil tank) and the interior of the oil tank. This pressure equalization is performed by the air duct in an automatic manner.
  • the air flowing through the air duct expands in the area of the breather outlet pipe leading to the breather and thus reduces the flow area available for the oil flow to the breather in the breather outlet pipe.
  • the air guide tube according to the invention is thus a tube which extends from a vent opening (deaerator outlet tube or vent tube) of the oil tank into the interior of the oil tank.
  • the air duct is fixed in the oil tank so that the vent of the oil tank, especially under positive g conditions is not blocked.
  • the length of the air guide tube so that it extends below the oil level line under normal g conditions and thus dips into the oil.
  • the air flowing out through the air guide tube counteracts a strong increase in pressure in the oil tank, which is caused by the incoming ventilation volumes and return volumes of oil.
  • the air guide tube according to the invention is arranged stationarily in the oil tank and has no moving parts.
  • the arrangement can be made on a wall of the oil tank, it is possible to arrange the Heilleitrohr centrally in the oil tank.
  • a dimensioning of the diameter of the Heilleitrohrs can be easily adapted to the particular circumstances.
  • the inventive design minimizes the risk of wear and / or malfunction.
  • One Another advantage is that the Heilleitrohr invention can be realized very inexpensively and can also be retrofitted into existing tank designs.
  • the Fig. 1 to 4 schematically show an oil tank 1, at its upper portion a breather outlet pipe 2 is arranged, which leads to a breather (Breather).
  • a connecting pipe 6 is provided, which is connected for example to a return line.
  • oil 5 is in the lower region of the oil tank 1, the air above the oil 5 has a pressure P1 and in the breather outlet pipe 2 there is a pressure P2.
  • the air flow is shown by the arrow 4.
  • the 3 and 4 show an embodiment of the invention with a schematically illustrated Gutleitrohr 3.
  • Die Fig. 3 shows an operating condition with positive g conditions.
  • the oil 5 is in the lower region of the oil tank 1, the air duct 3 is "out of function".
  • the stated pressures prevail, where P1> P2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

The tank (1) has an exhauster-outlet tube (2) connected with an exhauster and diverted from an upper area of the tank. A connection tube (6) is connected with a lower area of the tank, and a two sided open air guiding tube (3) is arranged in the upper area of the tank. The exhauster-outlet tube protrudes and extends to a middle area of the tank. The air guiding tube vertically extends in a normal condition of the tank under positive g-conditions. The air guiding tube with a lower area opens out below an oil-filling level line in a normal condition of the tank under positive g-conditions.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zur Vermeidung von hohen Öltank-Drücken unter negativen g-Bedingungen und insbesondere auf einen Fluggasturbinen-Öltank gemäß den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a device for avoiding high oil tank pressures under negative g conditions, and more particularly to an aircraft gas turbine oil tank according to the features of the preamble of claim 1.

Im Einzelnen bezieht sich die Erfindung auf einen Öltank mit einem von einem oberen Bereich des Öltanks abzweigenden, mit einem Entlüfter verbundenen Entlüfter-Auslassrohr sowie mit einem mit einem unteren Bereich des Tanks verbundenen Entlüfter-Anschlussrohr.Specifically, the invention relates to an oil tank having a breather outlet pipe branched from an upper portion of the oil tank and connected to a breather, and a breather connection pipe connected to a lower portion of the tank.

Unter positiven, normalen g-Bedingungen wirkt die Schwerkraft so, dass das in einem Öltank befindliche Öl sich in dem unteren Bereich des Tanks sammelt. Oberhalb des Öls befindet sich Luft, welche mit Ölpartikeln kontaminiert sein kann. Diese Luft wird zu einem Entlüfter (Breather) geleitet, in welchem die Ölpartikel abgeschieden werden.Under positive, normal g conditions, gravity acts so that the oil in an oil tank collects in the lower part of the tank. Above the oil is air, which may be contaminated with oil particles. This air is directed to a breather, where the oil particles are separated.

Unter negativen g-Bedingungen wirkt die Schwerkraft in entgegengesetzter oder teilweise entgegengesetzter Richtung. Hierdurch sammelt sich der Inhalt des Öltanks nicht am unteren Bereich des Öltanks, sondern am oberen Bereich, wo sich das Entlüfter-Auslassrohr befindet. Dieses wird bei negativen g-Bedingungen durch das Öl blockiert.Under negative g-conditions, gravity acts in opposite or partially opposite directions. As a result, the content of the oil tank does not accumulate at the bottom of the oil tank, but at the top, where the breather outlet pipe is located. This is blocked by the oil in negative g conditions.

Hierdurch ergibt sich der Nachteil, dass das Entlüfter-Auslassrohr mit Öl gefüllt wird und der Entlüfter (Breather) ebenfalls mit Öl anstelle von Luft versorgt wird.This has the disadvantage that the breather outlet pipe is filled with oil and the breather (Breather) is also supplied with oil instead of air.

Hierdurch ergibt sich ein drastischer Anstieg des Drucks im Öltank, insbesondere, da die Rückführpumpen weiterhin Öl in den Tank fördern. Dies kann Probleme hinsichtlich der Druckfestigkeit des Öltanks geben.This results in a drastic increase in the pressure in the oil tank, in particular, since the return pumps continue to promote oil in the tank. This can give problems regarding the pressure resistance of the oil tank.

Weiterhin erhöht sich der Druckverlust im Entlüfter (Breather-Druckverlust) durch die Verblockung oder Verstopfung des Entlüfters mit Öl. Dies führt zu Ölaustritten, zu einer Kontamination von Zapfluft, zu Ölgeruch in der Flugzeugkabine sowie zu Abdichtproblemen in den Lagerkammern einer Fluggasturbine.Furthermore, the pressure loss in the breather (breather pressure loss) increases due to the blockage or blockage of the deaerator with oil. This leads to oil spills, contamination of bleed air, smell of oil in the aircraft cabin and sealing problems in the storage chambers of an aircraft gas turbine.

Der Erfindung liegt die Aufgabe zugrunde, einen Fluggasturbinen-Öltank der eingangs beschriebenen Art zu schaffen, welcher bei einfachem Aufbau und einfacher, kostengünstiger Herstellbarkeit ein hohes Maß an Betriebssicherheit aufweist und insbesondere unter negativen g-Bedingungen funktionsfähig ist.The invention has for its object to provide an aircraft gas turbine oil tank of the type described above, which has a high level of reliability with a simple design and simple, cost manufacturability and in particular is functional under negative g conditions.

Erfindungsgemäß wird die Aufgabe durch die Merkmalskombination des Anspruchs 1 gelöst, die Unteransprüche zeigen weitere vorteilhafte Ausgestaltungen der Erfindung.According to the invention the object is achieved by the combination of features of claim 1, the dependent claims show further advantageous embodiments of the invention.

Erfindungsgemäß ist somit vorgesehen, dass im oberen Bereich des Öltanks ein Luftleitrohr angeordnet ist. Dieses ist beidseitig offen und erstreckt sich in das Entlüfter-Auslassrohr, in welches es hineinragt und das andere Ende des Luftleitrohrs mündet im mittleren Bereich des Öltanks.According to the invention it is thus provided that an air duct is arranged in the upper region of the oil tank. This is open on both sides and extends into the breather outlet pipe, in which it protrudes and the other end of the air duct opens in the central region of the oil tank.

Durch die erfindungsgemäße Ausgestaltung wird verhindert, dass sich ein hoher Druck in dem Öltank bei negativen g-Bedingungen ergibt. Durch das Luftleitrohr erfolgt ein Druckausgleich zwischen dem Entlüfter-Auslassrohr (der Entlüftungsleitung des Öltanks) und dem Innenraum des Öltanks. Dieser Druckausgleich wird durch das Luftleitrohr in automatischer Weise durchgeführt.The inventive design prevents a high pressure in the oil tank results in negative g conditions. Through the air duct pressure equalization takes place between the breather outlet pipe (the vent line of the oil tank) and the interior of the oil tank. This pressure equalization is performed by the air duct in an automatic manner.

Die durch das Luftleitrohr strömende Luft expandiert im Bereich des Entlüfter-Auslassrohrs, welches zum Entlüfter (Breather) führt und verringert so den für den Ölvolumenstrom zum Entlüfter im Entlüfter-Auslassrohr zur Verfügung stehenden Strömungsquerschnitt.The air flowing through the air duct expands in the area of the breather outlet pipe leading to the breather and thus reduces the flow area available for the oil flow to the breather in the breather outlet pipe.

Da durch das Luftleitrohr Luft in das Entlüfter-Auslassrohr und damit in den Entlüfter geleitet wird, wird ein Druckaufbau in dem Öltank verhindert.As air is directed through the air duct into the breather outlet pipe and thus into the breather, pressure buildup in the oil tank is prevented.

Das erfindungsgemäße Luftleitrohr ist somit ein Rohr, das sich von einer Entlüftungsöffnung (Entlüfter-Auslassrohr oder Entlüftungsrohr) des Öltanks in den Innenraum des Öltanks erstreckt. Das Luftleitrohr ist dabei so im Öltank fixiert, dass die Entlüftung des Öltanks, insbesondere unter positiven g-Bedingungen nicht blockiert wird.The air guide tube according to the invention is thus a tube which extends from a vent opening (deaerator outlet tube or vent tube) of the oil tank into the interior of the oil tank. The air duct is fixed in the oil tank so that the vent of the oil tank, especially under positive g conditions is not blocked.

Erfindungsgemäß ist es möglich, die Länge des Luftleitrohrs so auszubilden, dass sich dieses unter normalen g-Bedingungen bis unterhalb der Öl-Füllstandslinie erstreckt und somit in das Öl eintaucht.According to the invention, it is possible to design the length of the air guide tube so that it extends below the oil level line under normal g conditions and thus dips into the oil.

Wenn nunmehr unter negativen g-Bedingungen der Druck in dem Öltank ansteigt, bewirkt das Luftleitrohr Folgendes:

  • Entsprechend dem Druckgradienten wird somit auch bei negativen g-Bedingungen Öl in das Entlüfter-Auslassrohr und damit zum Entlüfter strömen. Dieses Öl wird aus dem Entlüfter-Auslassrohr abgesaugt, im Gegensatz zu dem Rest des Öls in dem Öltank. Durch das erfindungsgemäße Luftleitrohr kann somit relativ schnell Luft aus dem Innenbereich des Öltanks in das Entlüfter-Auslassrohr angesaugt werden.
Now, when the pressure in the oil tank increases under negative g conditions, the air duct causes:
  • According to the pressure gradient, oil will thus flow into the vent outlet pipe and thus to the deaerator even in the case of negative g conditions. This oil is extracted from the breather outlet tube, unlike the rest of the oil in the oil tank. As a result of the air guide tube according to the invention, it is thus possible to suck in air from the inner region of the oil tank into the deaerator outlet tube relatively quickly.

Aufgrund der geringeren Viskosität wird somit eine deutlich größere Menge Luft als Öl in das Entlüfter-Auslassrohr angesaugt. Die Luft expandiert im Entlüfter-Auslassrohr aufgrund des geringeren Druckes und verringert damit den für das Öl zur Verfügung stehenden Strömungsquerschnitt. Hierdurch wird ein weiterer Ölfluss durch das Entlüfter-Auslassrohr zum Entlüfter reduziert.Due to the lower viscosity, a significantly larger amount of air than oil is sucked into the breather outlet pipe. The air expands in the breather outlet tube due to the lower pressure and thus reduces the flow area available for the oil. This will reduce further oil flow through the breather outlet tube to the breather.

Die durch das Luftleitrohr ausströmende Luft wirkt einem starken Druckanstieg im Öltank entgegen, welcher durch die eintretenden Entlüftungsvolumina und Rückführvolumina an Öl verursacht wird.The air flowing out through the air guide tube counteracts a strong increase in pressure in the oil tank, which is caused by the incoming ventilation volumes and return volumes of oil.

Erfindungsgemäß werden somit extreme Drücke in dem Öltank ebenso vermieden, wie eine Überflutung des Entlüfters (Breathers). Unter normalen g-Bedingungen wirkt sich das Luftleitrohr nicht oder nur äußerst gering aus.Thus, according to the invention, extreme pressures in the oil tank are avoided as well as flooding of the breather. Under normal g conditions, the air duct will not work or will be very light.

Das erfindungsgemäße Luftleitrohr ist stationär in dem Öltank angeordnet und weist keinerlei bewegte Teile auf. Die Anordnung kann an einer Wandung des Öltanks erfolgen, es ist möglich, das Luftleitrohr mittig in dem Öltank anzuordnen. Auch eine Dimensionierung des Durchmessers des Luftleitrohrs kann in einfacher Weise an die jeweiligen Gegebenheiten angepasst werden. Durch die erfindungsgemäße Ausgestaltung ist das Risiko von Verschleiß und/oder Fehlfunktionen minimiert. Ein weiterer Vorteil besteht darin, dass das erfindungsgemäße Luftleitrohr sehr kostengünstig realisierbar ist und auch in bestehende Tank-Designs nachträglich eingebaut werden kann.The air guide tube according to the invention is arranged stationarily in the oil tank and has no moving parts. The arrangement can be made on a wall of the oil tank, it is possible to arrange the Luftleitrohr centrally in the oil tank. A dimensioning of the diameter of the Luftleitrohrs can be easily adapted to the particular circumstances. The inventive design minimizes the risk of wear and / or malfunction. One Another advantage is that the Luftleitrohr invention can be realized very inexpensively and can also be retrofitted into existing tank designs.

Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels in Verbindung mit der Zeichnung beschrieben. Dabei zeigt:

Fig. 1
eine schematische Darstellung eines Öltanks unter positiven g- Bedingungen gemäß dem Stand der Technik,
Fig. 2
eine Darstellung, analog Fig. 1, unter negativen g-Bedingungen gemäß dem Stand der Technik,
Fig. 3
eine Darstellung, analog Fig. 1, einer erfindungsgemäßen Ausgestaltung unter positiven g-Bedingungen, und
Fig. 4
eine Darstellung, analog Fig. 2, einer erfindungsgemäßen Ausgestaltung unter negativen g-Bedingungen.
In the following the invention will be described by means of an embodiment in conjunction with the drawing. Showing:
Fig. 1
a schematic representation of an oil tank under positive g conditions according to the prior art,
Fig. 2
a representation, analog Fig. 1 under negative g conditions according to the prior art,
Fig. 3
a representation, analog Fig. 1 , An embodiment of the invention under positive g conditions, and
Fig. 4
a representation, analog Fig. 2 , An embodiment of the invention under negative g conditions.

Die Fig. 1 bis 4 zeigen in schematischer Weise einen Öltank 1, an dessen oberem Bereich ein Entlüfter-Auslassrohr 2 angeordnet ist, welches zu einem Entlüfter (Breather) führt. Am unteren Bereich des Öltanks 1 ist ein Anschlussrohr 6 vorgesehen, welches beispielsweise mit einer Rückführleitung verbunden ist. In dem Öltank 1 befindet sich Öl 5, so wie dies gemäß Fig. 1 unter positiven g-Bedingungen dargestellt ist. Dabei befindet sich das Öl 5 im unteren Bereich des Öltanks 1, die Luft oberhalb des Öls 5 weist einen Druck P1 auf und in dem Entlüfter-Auslassrohr 2 herrscht ein Druck P2. Die Luftströmung ist durch den Pfeil 4 dargestellt.The Fig. 1 to 4 schematically show an oil tank 1, at its upper portion a breather outlet pipe 2 is arranged, which leads to a breather (Breather). At the lower region of the oil tank 1, a connecting pipe 6 is provided, which is connected for example to a return line. In the oil tank 1 is oil 5, as in accordance with Fig. 1 is shown under positive g conditions. In this case, the oil 5 is in the lower region of the oil tank 1, the air above the oil 5 has a pressure P1 and in the breather outlet pipe 2 there is a pressure P2. The air flow is shown by the arrow 4.

Bei einem Zustand mit negativen g-Bedingungen wird das Öl gemäß dem Stand der Technik, so wie in Fig. 2 gezeigt, in den oberen Bereich des Öltanks 1 gedrückt. Hierbei herrscht in dem Entlüfter-Auslassrohr 2 weiterhin ein Druck P2, während unterhalb des Öls 5 ein Druck P1 herrscht, der durch weiteres Zupumpen von Öl durch das Anschlussrohr 6 weiter erhöht wird.In a condition with negative g conditions, the oil according to the prior art, as in Fig. 2 shown pressed into the upper area of the oil tank 1. In this case, in the vent outlet 2 further prevails a pressure P2, while below the oil 5 there is a pressure P1, which is further increased by further pumping oil through the connecting pipe 6.

Die Fig. 3 und 4 zeigen eine erfindungsgemäße Ausgestaltung mit einem schematisch dargestellten Luftleitrohr 3. Die Fig. 3 zeigt einen Betriebszustand mit positiven g-Bedingungen. Dabei befindet sich das Öl 5 im unteren Bereich des Öltanks 1, das Luftleitrohr 3 ist "außer Funktion". Es herrschen die angegebenen Drücke, wobei P1 > P2 ist.The 3 and 4 show an embodiment of the invention with a schematically illustrated Luftleitrohr 3. Die Fig. 3 shows an operating condition with positive g conditions. In this case, the oil 5 is in the lower region of the oil tank 1, the air duct 3 is "out of function". The stated pressures prevail, where P1> P2.

Bei negativen g-Bedingungen (Fig. 4) wird das Öl, analog der Darstellung von Fig. 2, in den oberen Bereich des Öltanks gedrückt und in das Entlüfter-Auslassrohr eingeführt. Dabei strömt erfindungsgemäß durch das Luftleitrohr 3 Luft aus dem unteren Bereich des Öltanks 1 durch das Luftleitrohr 3 in das Entlüfter-Auslassrohr 2. Dort expandiert die Luft, wie mit dem Bezugszeichen 7 dargestellt. Es ergibt sich somit trotz des erheblich größeren Drucks P1 >> P2 eine ausreichende Entlüftung, wie durch die Luftströmung 4 in Fig. 4 dargestellt.For negative g conditions ( Fig. 4 ) is the oil, analogous to the representation of Fig. 2 , pushed into the upper area of the oil tank and inserted into the breather outlet pipe. According to the invention, air flows through the air duct 3 from the lower region of the oil tank 1 through the air duct 3 into the ventilator outlet pipe 2. There, the air expands, as shown by the reference numeral 7. Thus, despite the considerably greater pressure P1 >> P2, there is sufficient ventilation, as by the air flow 4 in Fig. 4 shown.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Öltankoil tank
22
Entlüfter-AuslassrohrBreather outlet pipe
33
Luftleitrohrair guide
44
Luftströmungairflow
55
Öloil
66
Anschlussrohrconnecting pipe
77
expandierende Luftexpanding air

Claims (3)

Fluggasturbinen-Öltank mit einem von einem oberen Bereich des Öltanks (1) abzweigenden, mit einem Entlüfter verbundenen Entlüfter-Auslassrohr (2) sowie mit einem mit einem unteren Bereich des Öltanks (1) verbundenen Anschlussrohr (6), dadurch gekennzeichnet, dass im oberen Bereich des Öltanks (1), in das Entlüfter-Auslassrohr (2) ragend und sich zu einem mittleren Bereich des Öltanks (1) erstreckend, ein beidseitig offenes Luftleitungsrohr (3) angeordnet ist.An aircraft gas turbine oil tank with a breather outlet pipe (2) branched off from an upper region of the oil tank (1) and connected to a breather and with a connection pipe (6) connected to a lower region of the oil tank (1), characterized in that in the upper one Area of the oil tank (1), in the breather outlet pipe (2) protruding and extending to a central region of the oil tank (1), an open on both sides air duct pipe (3) is arranged. Öltank nach Anspruch 1, dadurch gekennzeichnet, dass sich das Luftleitrohr (3) im Normalzustand des Öltanks (1) unter positiven g-Bedingungen im Wesentlichen vertikal erstreckt.Oil tank according to claim 1, characterized in that the Luftleitrohr (3) extends in the normal state of the oil tank (1) under positive g conditions substantially vertically. Öltank nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Luftleitrohr (3) mit seinem unteren Bereich im Normalzustand des Öltanks unter positiven g-Bedingungen unterhalb einer Öl-Füllstandslinie mündet.Oil tank according to claim 1 or 2, characterized in that the Luftleitrohr (3) opens with its lower portion in the normal state of the oil tank under positive g conditions below an oil level line.
EP09010617.0A 2008-11-25 2009-08-18 Device for avoiding high oil tank pressures under negative g conditions Not-in-force EP2196635B1 (en)

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DE200810058981 DE102008058981A1 (en) 2008-11-25 2008-11-25 Device for avoiding high oil tank pressures under negative g conditions

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EP2196635A2 true EP2196635A2 (en) 2010-06-16
EP2196635A3 EP2196635A3 (en) 2011-06-15
EP2196635B1 EP2196635B1 (en) 2015-11-11

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US9981752B2 (en) 2016-09-27 2018-05-29 Pratt & Whitney Canada Corp. Liquid tank system with over pressure protection

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Publication number Priority date Publication date Assignee Title
US3130022A (en) * 1960-03-22 1964-04-21 English Electric Co Ltd Liquid reservoirs for aircraft
US4287913A (en) * 1979-09-29 1981-09-08 Rolls-Royce Limited Tank suitable for holding liquids
JPS58113811U (en) * 1982-01-28 1983-08-03 いすゞ自動車株式会社 Engine air bleed structure
DE19529733C1 (en) * 1995-08-12 1996-12-05 Mtu Friedrichshafen Gmbh Lubricant supply system for vehicle combustion engine

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US20100126589A1 (en) 2010-05-27
US8256458B2 (en) 2012-09-04
DE102008058981A1 (en) 2010-05-27
EP2196635A3 (en) 2011-06-15
EP2196635B1 (en) 2015-11-11

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