EP3516177A1 - System for deoiling an air-oil mixture for pressurising seals of a turbine engine - Google Patents

System for deoiling an air-oil mixture for pressurising seals of a turbine engine

Info

Publication number
EP3516177A1
EP3516177A1 EP17783936.2A EP17783936A EP3516177A1 EP 3516177 A1 EP3516177 A1 EP 3516177A1 EP 17783936 A EP17783936 A EP 17783936A EP 3516177 A1 EP3516177 A1 EP 3516177A1
Authority
EP
European Patent Office
Prior art keywords
degasser
oil
mechanical
housing
mixture
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.)
Withdrawn
Application number
EP17783936.2A
Other languages
German (de)
French (fr)
Inventor
Benjamin FULLERINGER
Jean-Pierre Pajard
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.)
Safran Helicopter Engines SAS
Original Assignee
Safran Helicopter Engines SAS
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 Safran Helicopter Engines SAS filed Critical Safran Helicopter Engines SAS
Publication of EP3516177A1 publication Critical patent/EP3516177A1/en
Withdrawn legal-status Critical Current

Links

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
    • F16N39/002—Arrangements for conditioning of lubricants in the lubricating system by deaeration
    • 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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0422—Separating oil and gas with a centrifuge device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/60—Fluid transfer
    • F05D2260/609—Deoiling or demisting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/98—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
    • F16N7/30—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated the oil being fed or carried along by another fluid
    • F16N7/32—Mist lubrication
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Definitions

  • the invention relates to a de-oiling system of an air / oil pressurizing pressurizing seal or pressurized speakers of a turbomachine, such as carbon rings, brushes, labyrinths, etc.
  • Turbomachines are complex systems that implement a number of rotating assemblies (turbines, compressor, etc.) that must be equipped with sealing devices. These sealing devices are for example made by pressurized air labyrinths arranged in the vicinity of rotating assemblies or by brushed joints or carbon rings. To do this, air is taken directly into the air stream of the turbomachine. This air then passes into the turbomachine by the different seals provided for this purpose, then is discharged to the outside of the turbomachine to limit the rise in pressure of other areas of the turbomachine, including the gearbox, the accessory box, etc.. However, since this air has passed through different zones of the turbomachine, it is loaded with oil used for cooling and lubricating the bearings and the gears of the rotating assemblies.
  • sealing devices are for example made by pressurized air labyrinths arranged in the vicinity of rotating assemblies or by brushed joints or carbon rings. To do this, air is taken directly into the air stream of the turbomachine. This air then passes into the turbomachine by the different seals provided for
  • At least one centrifugal degasser comprising a separation chamber for the mixture arranged around a drive shaft, a mixing inlet in said enclosure, a de-oiled air outlet, and an oil outlet extracted from said mixture,
  • At least one mechanical casing of the turbomachine comprising a plurality of mechanical parts at least one of which is mechanically connected to said drive shaft of said degasser so as to be able to drive it in rotation, said casing being configured to be able to contain a fog of lubricating oil of said mechanical parts.
  • the degasser is arranged directly in the mechanical housing to ensure its training.
  • This mechanical housing comprises a plurality of mechanical parts of which at least one - a pinion for example - is mechanically connected, directly or indirectly, to the shaft of the degasser so as to allow the rotation of the degasser.
  • This mechanical housing is typically an accessory housing or a reduction gear of the turbomachine.
  • the entire mechanical housing and degasser form the de-oiling system of the pressurized air / oil mixture seals or pressurized speakers.
  • the air / oil mixture arrives in the mechanical housing in order to be treated by the degasser which is directly arranged in the mechanical housing.
  • the air / oil pressurization mixture is mixed with the oil mist present in the mechanical housing, and it is the assembly formed of the air / oil pressurization mixture and the oil mist of the mechanical housing that the degasser treats. in the separation chamber.
  • the inventors have sought to improve the yields of known deoiling systems.
  • the inventors have sought to provide a de-oiling system which makes it possible to limit as much as possible the quantity of oil discharged to the outside.
  • the reduction of the oil consumption of the turbomachines remains a major progress access. This should make it possible to optimize the quantity of onboard oil and thus reduce the mass of the turbomachine. This should also help to increase the duration of missions. This should also reduce maintenance work on the turboshaft engines. Finally, this must improve the ecological impact of turboshaft engines.
  • the invention aims to provide a deoiling system that overcomes at least some of the disadvantages of known systems.
  • the invention aims in particular to provide, in at least one embodiment, a deoiling system which optimizes the efficiency of the degassers.
  • the invention relates to a system for de-oiling an air / oil mixture for pressurizing pressurized enclosures of a turbomachine, said system comprising:
  • At least one centrifugal degasser comprising a separation chamber for said mixture arranged around a drive shaft, a mixing inlet in said enclosure, a deoiled air outlet and an oil outlet extracted from said mixture,
  • At least one mechanical casing of the turbomachine comprising a plurality of mechanical parts at least one of which is mechanically connected to said drive shaft of said degasser so as to be able to drive it in rotation, said casing being configured to be able to contain a fog of lubricating oil of said mechanical parts.
  • a de-oiling system is characterized in that it comprises means for isolating said air / oil mixture with respect to said oil mist from said mechanical housing so that said oil mist of said mechanical housing can not not enriching oil said mixture to be separated by said degasser, and in that it comprises a double degasser configured to be able to treat in a first chamber air pressurized speakers and in a second chamber, the air of the mechanical housing.
  • the invention organizes a physical separation between the air / oil mixture having circulated in the pressurized chambers of the turbomachine and the mechanical housing participating in the rotary drive of the degasser.
  • the air / oil mixture to be separated by the degasser from the deoiling system is isolated from the oil mist present in the mechanical housing. This isolation prevents the enrichment of the air / oil mixture from the pressurized enclosures of the turbomachine oil from the oil mist of the mechanical housing.
  • a system according to the invention also makes it possible to reduce the temperature of the mechanical housing by limiting the heat exchange between the air / oil mixture from the pressurized chambers of the turbomachine, which is a hot mixture, and the oil mist from the housing. mechanical.
  • a deoiling system according to the invention therefore reduces the cooling needs of the mechanical housing.
  • the pressurized enclosures of a turbomachine can be formed according to the architectures chosen by carbon rings, brush seals, labyrinths, or any equivalent devices.
  • said means for isolating said mixture comprise a pipe directly connecting an outlet of said pressurized enclosures to said inlet of said mixture in said enclosure of said degasser so that said mixture of pressurized enclosures directly feeds said degasser without interaction with said oil mist of the mechanical housing.
  • the deoiling system comprises a pipe connecting an output of the pressurized speakers of the turbomachine to the mixing inlet of the degasser.
  • this pipe isolates the mixing circulation between the pressurized vessels and the oil mist degasser present in the mechanical housing.
  • This pipe prevents the enrichment of the air / oil mixture from the pressurized enclosures by the lubricating oil of the mechanical housing.
  • the degasser is housed in said mechanical housing and said conduit passes through said mechanical housing.
  • This advantageous variant makes it possible to maintain an architecture close to the architecture of the known systems, that is to say to maintain the degasser in the mechanical housing, but to isolate the mixture of the fog by the arrangement a pipe between the inlet of the degasser and the pressurized enclosures. To do this, the pipe passes through the mechanical housing.
  • said drive shaft of said degasser is hollow and forms at least a portion of said pipe connecting said pressurized speakers of the turbomachine to the inlet of the degasser.
  • said drive shaft of said degasser is hollow and allows suction of the mixture in the chamber between the mechanical housing and an air intake casing of a compressor of the turbine engine.
  • This variant advantageously takes advantage of the drive shaft of the degasser to make it play, in addition to its role of setting the degasser in motion, a role of tracking the mixture to be separated and means for isolating the mixture of fog d oil in the mechanical housing.
  • said degasser is arranged outside said mechanical housing and said drive shaft of said degasser passes through said mechanical housing, said mechanical housing forming said means for isolating said mixture from the fog oil.
  • the degasser is arranged outside the mechanical housing, the housing of the mechanical housing thus forming the means for isolating the mixture from the oil mist.
  • the degasser is arranged between the mechanical housing and an air intake casing of a compressor of the turbomachine.
  • said mechanical housing is a gearbox or accessory housing of the turbomachine.
  • the oil outlet of said degasser opens into said mechanical housing.
  • the oil extracted by the degasser can be used to lubricate the mechanical parts of the mechanical housing.
  • the invention also relates to a turbine engine comprising a deoiling system according to the invention.
  • a turbine engine according to the invention equipped with a deoiling system according to the invention therefore consumes less oil than a turbine engine of the prior art by improved oil recovery.
  • a turbine engine according to the invention has a lighter weight than a turbine engine of the prior art.
  • the duration of a mission of a helicopter equipped with turbine engines according to the invention is therefore longer.
  • maintenance operations are less frequent.
  • the ecological impact of a turbine engine according to the invention is better than that of the turboshaft engines of the prior art.
  • the invention also relates to a degasser and a turbomachine characterized in combination by all or some of the characteristics mentioned above or below.
  • FIG. 1 is a schematic functional view of a de-oiling system of an air / oil pressurization mixture of seals of a turbomachine according to the prior art
  • FIG. 2 is a schematic functional view of a de-oiling system of an air / oil pressurization mixture of seals of a turbomachine according to the invention
  • FIG. 3 is a schematic view of a degasser of a deoiling system according to one embodiment of the invention.
  • FIG. 1 shows a shaft 10 of a turbomachine equipped with a deoiling system of the prior art.
  • This tree 10 is for example the line of trees of a gas generator and a free turbine of a turbine engine of a helicopter.
  • Pressurized air represented by arrows 11 in continuous lines, is injected into the seals in order to seal the pressurized vessels 13 of the turbomachine.
  • This air 11 is charged with oil during its circulation in the pressurized vessels 13.
  • Figure 1 there is shown a mixture of air and oil flowing along the shaft 10 of the turbomachine.
  • the broken lines 11 represent the air and the dashed lines 12 represent the oil of the mixture.
  • the de-oiling system of the air / oil mixture of the seals 13 comprises a centrifugal degasser which is housed in a box 30 of accessories.
  • a centrifugal degasser which is housed in a box 30 of accessories.
  • Such an accessory box 30 comprises a plurality of pinions 21, 22 which are arranged relative to each other and mechanically connected so as to be able to recover mechanical power from the shaft 10 of the turbomachine and to supply this mechanical power to different servitudes necessary for the operation of the turbomachine, and in particular the centrifugal degasser 20 to ensure its rotational drive.
  • the accessory box further comprises a nozzle 32 for supplying oil 33 for lubricating the various mechanical parts housed in the accessory box, such as in particular the pinions 21, 22.
  • This nozzle 32 is supplied with oil by a reserve 35 of oil arranged outside the box 30 of accessories.
  • the air / oil mixture necessary for the seals of the pressurized enclosures 13 is directly injected into the accessory box so that the degasser treats the assembly formed of the air / oil mixture of the pressurized enclosures 13 and the fog 39.
  • FIG. 2 very schematically shows the configuration of the deoiling system according to one embodiment of the invention.
  • the air / oil mixture of the pressurized housings 13 of the turbomachine is no longer injected directly into the accessory box, but is guided directly to the inlet 27 of the degasser through a pipe 40 which connects the pressurized speakers 13 to the inlet 27 of the degasser.
  • This line 40 thus makes it possible to isolate the air / oil mixture originating from the pressurized enclosures 13 with respect to the mist 39 of oil present in the accessory box.
  • this pipe 40 between the output of the pressurized enclosures 13 and the inlet 27 of the degasser therefore prevents the oil mist of the can 30 enrich oil in the air / oil mixture of the pressurized enclosures 13 to be separated by the degasser 20.
  • the degasser 20 further comprises an oil outlet 28 extracted from the mixture and an outlet 29 of deoiled air.
  • the oil outlet 28 is directly connected to the inside of the accessory box 30 so as to be able to lubricate the mechanical parts of the box.
  • the oil extracted from the mixture is injected into the oil reserve.
  • This conduit may for example pass through the accessory box 30 so that the degasser 20 remains housed in the accessory box.
  • the degasser is housed outside the accessory box and its rotation drive is obtained by a shaft which passes through the box 30 of accessories.
  • the mixing feed may be either carried out by a pipe such as that described in connection with the embodiment of FIG. 2, or by direct diffusion of the mixture into the inlet of the degasser.
  • the feed of the degasser 20 in an air / oil mixture is carried out via the drive shaft 52 of the degasser.
  • This drive shaft 52 is hollow such that one end 53 of the shaft can receive the mixture to be treated and the other end 54 of the opposite shaft allows the evacuation of the deoiled air mixture.
  • a partition 70 arranged in the hollow shaft 52 further allows the inlet 53 to be separated from the outlet 54 and thus forces the passage of the air mixture into the enclosures 58a, 58b of the degasser.
  • the circulation of the mixture from the turbine, that is to say, the shaft 10 at the inlet 53 of the degasser is shown schematically by the arrows 59 in Figure 3.
  • the degasser is further rotated by means of a pinion 60 mounted integrally on the hollow shaft 52 and rotated by the shaft 10.
  • the degasser comprises two degassing chambers arranged on its drive shaft, an enclosure 58a intended to treat the air / oil mixture resulting from the seals and taken from an air inlet casing as described above, and a chamber 58b for treating the oil mist present inside the accessory box.
  • the degasser may comprise only a degassing enclosure.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

The invention relates to a system for deoiling an air-oil pressurising mixture (11, 12) for pressurised enclosures (13) of a turbine engine, said system comprising: at least one centrifugal degasser (20); at least one mechanical casing (30) of the turbine engine comprising a plurality of mechanical parts (21, 22), at least one of which is mechanically connected to a drive shaft of said degasser (20) so as to be able to rotate same, said casing (30) being configured to be able to contain an oil mist (39) for lubricating said mechanical parts (21, 22), characterised in that said deoiling system also comprises means (40) for isolating said air-oil mixture (11, 12) from said oil mist (39) of said mechanical casing (30) so that said oil mist (39) of said mechanical casing (30) cannot enrich with oil said mixture to be separated by said degasser.

Description

SYSTÈME DE DÉSHUILAGE D'UN MÉLANGE AIR/HUILE DE PRESSURISATION D'ÉTANCHÉITÉS D'UNE TURBOMACHINE  SYSTEM FOR REMOVING AN AIR / OIL MIXTURE FOR PRESSURIZING THE SEALS OF A TURBOMACHINE
1. Domaine technique de l'invention 1. Technical field of the invention
L'invention concerne un système de déshuilage d'un mélange air/huile de pressurisation d'étanchéités ou d'enceintes pressurisées d'une turbomachine, telles que des bagues carbone, joints à brosses, labyrinthes, etc.  The invention relates to a de-oiling system of an air / oil pressurizing pressurizing seal or pressurized speakers of a turbomachine, such as carbon rings, brushes, labyrinths, etc.
2. Arrière-plan technologique 2. Technological background
Les turbomachines sont des systèmes complexes qui mettent en œuvre un certain nombre d'ensembles tournants (turbines, compresseur, etc.) qui doivent être équipés de dispositifs d'étanchéité. Ces dispositifs d'étanchéité sont par exemple réalisés par des labyrinthes à air pressurisé aménagés au voisinage des ensembles tournants ou par des joins à brosses ou par des bagues carbone. Pour ce faire, un air est prélevé directement dans la veine d'air de la turbomachine. Cet air transite ensuite dans la turbomachine par les différentes étanchéités prévues à cet effet, puis est évacué vers l'extérieur de la turbomachine pour limiter la montée en pression des autres zones de la turbomachine, notamment le réducteur, la boite accessoire, etc. Or, cet air ayant transité par différentes zones de la turbomachine, il est chargé en huile utilisé pour le refroidissement et la lubrification des paliers et des pignons des ensembles tournants. Pour éviter le rejet d'air chargé d'huile, atténuer l'impact écologique des turbomachines, réduire la consommation d'huile et limiter les opérations de remplissage des réserves d'huile, il est important de prévoir des systèmes de déshuilage du mélange air/huile de pressurisation afin de pouvoir d'une part récupérer l'huile et d'autre part évacuer un air déshuilé vers l'extérieur de la turbomachine.  Turbomachines are complex systems that implement a number of rotating assemblies (turbines, compressor, etc.) that must be equipped with sealing devices. These sealing devices are for example made by pressurized air labyrinths arranged in the vicinity of rotating assemblies or by brushed joints or carbon rings. To do this, air is taken directly into the air stream of the turbomachine. This air then passes into the turbomachine by the different seals provided for this purpose, then is discharged to the outside of the turbomachine to limit the rise in pressure of other areas of the turbomachine, including the gearbox, the accessory box, etc.. However, since this air has passed through different zones of the turbomachine, it is loaded with oil used for cooling and lubricating the bearings and the gears of the rotating assemblies. To avoid the rejection of oil-laden air, to reduce the ecological impact of turbomachinery, to reduce oil consumption and to limit the operations of filling oil reserves, it is important to provide de-oiling systems for the air mixture. / pressurizing oil in order to be able on the one hand to recover the oil and on the other hand to evacuate a deoiled air towards the outside of the turbomachine.
Il est connu qu'un tel système de déshuilage d'un mélange air/huile de pressurisation des étanchéités ou des enceintes pressurisées d'une turbomachine comprend :  It is known that such a de-oiling system of an air / oil pressurization mixture sealing or pressurized enclosure of a turbomachine comprises:
- au moins un dégazeur centrifuge comprenant une enceinte de séparation du mélange agencé autour d'un arbre d'entraînement, une entrée de mélange dans ladite enceinte, une sortie d'air déshuilé et une sortie d'huile extraite dudit mélange, at least one centrifugal degasser comprising a separation chamber for the mixture arranged around a drive shaft, a mixing inlet in said enclosure, a de-oiled air outlet, and an oil outlet extracted from said mixture,
- au moins un boîtier mécanique de la turbomachine comprenant une pluralité de pièces mécaniques dont au moins une est reliée mécaniquement audit arbre d'entraînement dudit dégazeur de manière à pouvoir l'entraîner en rotation, ledit boîtier étant configuré pour pouvoir contenir un brouillard d'huile de lubrification desdites pièces mécaniques.  at least one mechanical casing of the turbomachine comprising a plurality of mechanical parts at least one of which is mechanically connected to said drive shaft of said degasser so as to be able to drive it in rotation, said casing being configured to be able to contain a fog of lubricating oil of said mechanical parts.
Il est également connu que le dégazeur est agencé directement dans le boîtier mécanique pour assurer son entraînement. Ce boîtier mécanique comprend une pluralité de pièces mécaniques dont au moins une - un pignon par exemple - est reliée mécaniquement, directement ou indirectement, à l'arbre du dégazeur de manière à permettre l'entraînement en rotation du dégazeur. Ce boîtier mécanique est typiquement un boîtier accessoire ou un réducteur de la turbomachine.  It is also known that the degasser is arranged directly in the mechanical housing to ensure its training. This mechanical housing comprises a plurality of mechanical parts of which at least one - a pinion for example - is mechanically connected, directly or indirectly, to the shaft of the degasser so as to allow the rotation of the degasser. This mechanical housing is typically an accessory housing or a reduction gear of the turbomachine.
L'ensemble du boîtier mécanique et du dégazeur forme le système de déshuilage du mélange air/huile pressurisé des étanchéités ou enceintes pressurisées.  The entire mechanical housing and degasser form the de-oiling system of the pressurized air / oil mixture seals or pressurized speakers.
Dans un système de déshuilage connu, le mélange air/huile arrive dans le boîtier mécanique afin d'être traité par le dégazeur qui est directement agencé dans le boîtier mécanique. Ainsi, le mélange air/huile de pressurisation est mélangé au brouillard d'huile présent dans le boîtier mécanique, et c'est l'ensemble formé du mélange air/huile de pressurisation et du brouillard d'huile du boîtier mécanique que le dégazeur traite dans l'enceinte de séparation.  In a known deoiling system, the air / oil mixture arrives in the mechanical housing in order to be treated by the degasser which is directly arranged in the mechanical housing. Thus, the air / oil pressurization mixture is mixed with the oil mist present in the mechanical housing, and it is the assembly formed of the air / oil pressurization mixture and the oil mist of the mechanical housing that the degasser treats. in the separation chamber.
Les inventeurs ont cherché à améliorer les rendements des systèmes de déshuilage connus.  The inventors have sought to improve the yields of known deoiling systems.
En particulier, les inventeurs ont cherché à fournir un système de déshuilage qui permet de limiter au maximum la quantité d'huile rejetée vers l'extérieur. En particulier, la réduction de la consommation en huile des turbomachines reste un accès de progrès majeur. Cela doit permettre d'optimiser la quantité d'huile embarquée et donc de réduire la masse de la turbomachine. Cela doit également permettre d'augmenter la durée des missions. Cela doit également réduire les opérations de maintenance sur les turbomoteurs. Enfin, cela doit permettre d'améliorer l'impact écologique des turbomoteurs. In particular, the inventors have sought to provide a de-oiling system which makes it possible to limit as much as possible the quantity of oil discharged to the outside. In particular, the reduction of the oil consumption of the turbomachines remains a major progress access. This should make it possible to optimize the quantity of onboard oil and thus reduce the mass of the turbomachine. This should also help to increase the duration of missions. This should also reduce maintenance work on the turboshaft engines. Finally, this must improve the ecological impact of turboshaft engines.
3. Objectifs de l'invention 3. Objectives of the invention
L'invention vise à fournir un système de déshuilage qui pallie au moins certains des inconvénients des systèmes connus.  The invention aims to provide a deoiling system that overcomes at least some of the disadvantages of known systems.
L'invention vise en particulier à fournir, dans au moins un mode de réalisation, un système de déshuilage qui optimise le rendement des dégazeurs.  The invention aims in particular to provide, in at least one embodiment, a deoiling system which optimizes the efficiency of the degassers.
4. Exposé de l'invention  4. Presentation of the invention
Pour ce faire, l'invention concerne un système de déshuilage d'un mélange air/huile de pressurisation d'enceintes pressurisées d'une turbomachine, ledit système comprenant :  To this end, the invention relates to a system for de-oiling an air / oil mixture for pressurizing pressurized enclosures of a turbomachine, said system comprising:
- au moins un dégazeur centrifuge comprenant une enceinte de séparation dudit mélange agencé autour d'un arbre d'entraînement, une entrée de mélange dans ladite enceinte, une sortie d'air déshuilé et une sortie d'huile extraite dudit mélange,  at least one centrifugal degasser comprising a separation chamber for said mixture arranged around a drive shaft, a mixing inlet in said enclosure, a deoiled air outlet and an oil outlet extracted from said mixture,
- au moins un boîtier mécanique de la turbomachine comprenant une pluralité de pièces mécaniques dont au moins une est reliée mécaniquement audit arbre d'entraînement dudit dégazeur de manière à pouvoir l'entraîner en rotation, ledit boîtier étant configuré pour pouvoir contenir un brouillard d'huile de lubrification desdites pièces mécaniques.  at least one mechanical casing of the turbomachine comprising a plurality of mechanical parts at least one of which is mechanically connected to said drive shaft of said degasser so as to be able to drive it in rotation, said casing being configured to be able to contain a fog of lubricating oil of said mechanical parts.
Un système de déshuilage selon l'invention est caractérisé en ce qu'il comprend des moyens d'isolement dudit mélange air/huile par rapport audit brouillard d'huile dudit boîtier mécanique de telle sorte que ledit brouillard d'huile dudit boîtier mécanique ne puisse pas enrichir en huile ledit mélange à séparer par ledit dégazeur, et en ce qu'il comprend un dégazeur double configuré pour pouvoir traiter dans une première enceinte l'air des enceintes pressurisées et dans une deuxième enceinte, l'air du boîtier mécanique.  A de-oiling system according to the invention is characterized in that it comprises means for isolating said air / oil mixture with respect to said oil mist from said mechanical housing so that said oil mist of said mechanical housing can not not enriching oil said mixture to be separated by said degasser, and in that it comprises a double degasser configured to be able to treat in a first chamber air pressurized speakers and in a second chamber, the air of the mechanical housing.
En d'autres termes, l'invention organise une séparation physique entre le mélange air/huile ayant circulé dans les enceintes pressurisées de la turbomachine et le boîtier mécanique participant à l'entraînement en rotation du dégazeur. En particulier, le mélange air/huile à séparer par le dégazeur du système de déshuilage est isolé du brouillard d'huile présent dans le boîtier mécanique. Cet isolement empêche l'enrichissement du mélange air/huile issu des enceintes pressurisées de la turbomachine en huile issue du brouillard d'huile du boîtier mécanique. In other words, the invention organizes a physical separation between the air / oil mixture having circulated in the pressurized chambers of the turbomachine and the mechanical housing participating in the rotary drive of the degasser. In In particular, the air / oil mixture to be separated by the degasser from the deoiling system is isolated from the oil mist present in the mechanical housing. This isolation prevents the enrichment of the air / oil mixture from the pressurized enclosures of the turbomachine oil from the oil mist of the mechanical housing.
Un système selon l'invention permet en outre une diminution de la température du boîtier mécanique en limitant les échanges thermiques entre le mélange air/huile issu des enceintes pressurisées de la turbomachine, qui est un mélange chaud, et le brouillard d'huile du boîtier mécanique. Un système de déshuilage selon l'invention permet donc de réduire les besoins de refroidissement du boîtier mécanique.  A system according to the invention also makes it possible to reduce the temperature of the mechanical housing by limiting the heat exchange between the air / oil mixture from the pressurized chambers of the turbomachine, which is a hot mixture, and the oil mist from the housing. mechanical. A deoiling system according to the invention therefore reduces the cooling needs of the mechanical housing.
Les enceintes pressurisées d'une turbomachine peuvent être formées selon les architectures choisies par des bagues carbone, des joints à brosses, des labyrinthes, ou tout dispositifs équivalents. Avantageusement et selon l'invention, lesdits moyens d'isolement dudit mélange comprennent une conduite reliant directement une sortie desdites enceintes pressurisées à ladite entrée dudit mélange dans ladite enceinte dudit dégazeur de telle sorte que ledit mélange des enceintes pressurisées alimente directement ledit dégazeur sans interaction avec ledit brouillard d'huile du boîtier mécanique.  The pressurized enclosures of a turbomachine can be formed according to the architectures chosen by carbon rings, brush seals, labyrinths, or any equivalent devices. Advantageously and according to the invention, said means for isolating said mixture comprise a pipe directly connecting an outlet of said pressurized enclosures to said inlet of said mixture in said enclosure of said degasser so that said mixture of pressurized enclosures directly feeds said degasser without interaction with said oil mist of the mechanical housing.
Selon cette variante, le système de déshuilage comprend une conduite reliant une sortie des enceintes pressurisées de la turbomachine à l'entrée de mélange du dégazeur. Ainsi, cette conduite isole la circulation de mélange entre les enceintes pressurisées et le dégazeur du brouillard d'huile présent dans le boîtier mécanique. Cette conduite permet d'empêcher l'enrichissement du mélange air/huile issu des enceintes pressurisées par l'huile de lubrification du boîtier mécanique.  According to this variant, the deoiling system comprises a pipe connecting an output of the pressurized speakers of the turbomachine to the mixing inlet of the degasser. Thus, this pipe isolates the mixing circulation between the pressurized vessels and the oil mist degasser present in the mechanical housing. This pipe prevents the enrichment of the air / oil mixture from the pressurized enclosures by the lubricating oil of the mechanical housing.
Avantageusement et selon cette variante, le dégazeur est logé dans ledit boîtier mécanique et ladite conduite traverse ledit boîtier mécanique.  Advantageously and according to this variant, the degasser is housed in said mechanical housing and said conduit passes through said mechanical housing.
Cette variante avantageuse permet de conserver une architecture proche de l'architecture des systèmes connus, c'est-à-dire de maintenir le dégazeur dans le boîtier mécanique, mais d'isoler le mélange du brouillard par l'aménagement d'une conduite entre l'entrée du dégazeur et les enceintes pressurisées. Pour ce faire, la conduite traverse le boîtier mécanique. This advantageous variant makes it possible to maintain an architecture close to the architecture of the known systems, that is to say to maintain the degasser in the mechanical housing, but to isolate the mixture of the fog by the arrangement a pipe between the inlet of the degasser and the pressurized enclosures. To do this, the pipe passes through the mechanical housing.
Avantageusement et selon cette variante, ledit arbre d'entraînement dudit dégazeur est creux et forme au moins une portion de ladite conduite reliant lesdites enceintes pressurisées de la turbomachine à l'entrée du dégazeur.  Advantageously and according to this variant, said drive shaft of said degasser is hollow and forms at least a portion of said pipe connecting said pressurized speakers of the turbomachine to the inlet of the degasser.
Par exemple, selon une variante avantageuse de l'invention, ledit arbre d'entraînement dudit dégazeur est creux et permet une aspiration du mélange dans l'enceinte entre le boîtier mécanique et un carter d'entrée d'air d'un compresseur de la turbomachine.  For example, according to an advantageous variant of the invention, said drive shaft of said degasser is hollow and allows suction of the mixture in the chamber between the mechanical housing and an air intake casing of a compressor of the turbine engine.
Cette variante met utilement à profit l'arbre d'entraînement du dégazeur pour lui faire jouer, en plus de son rôle de mise en mouvement du dégazeur, un rôle de cheminement du mélange à séparer et de moyens d'isolement du mélange du brouillard d'huile présent dans le boîtier mécanique.  This variant advantageously takes advantage of the drive shaft of the degasser to make it play, in addition to its role of setting the degasser in motion, a role of tracking the mixture to be separated and means for isolating the mixture of fog d oil in the mechanical housing.
Avantageusement et selon une autre variante de l'invention, ledit dégazeur est agencé à l'extérieur dudit boîtier mécanique et ledit arbre d'entraînement dudit dégazeur traverse ledit boîtier mécanique, ledit boîtier mécanique formant lesdits moyens d'isolement dudit mélange par rapport au brouillard d'huile.  Advantageously and according to another variant of the invention, said degasser is arranged outside said mechanical housing and said drive shaft of said degasser passes through said mechanical housing, said mechanical housing forming said means for isolating said mixture from the fog oil.
Selon cette variante, le dégazeur est agencé à l'extérieur du boîtier mécanique, le carter du boîtier mécanique formant ainsi les moyens d'isolement du mélange par rapport au brouillard d'huile.  According to this variant, the degasser is arranged outside the mechanical housing, the housing of the mechanical housing thus forming the means for isolating the mixture from the oil mist.
Par exemple, selon une variante avantageuse de l'invention, le dégazeur est agencé entre le boîtier mécanique et un carter d'entrée d'air d'un compresseur de la turbomachine.  For example, according to an advantageous variant of the invention, the degasser is arranged between the mechanical housing and an air intake casing of a compressor of the turbomachine.
Avantageusement et selon l'invention, ledit boîtier mécanique est un boîtier réducteur ou un boîtier accessoires de la turbomachine.  Advantageously and according to the invention, said mechanical housing is a gearbox or accessory housing of the turbomachine.
Avantageusement et selon l'invention, la sortie d'huile dudit dégazeur débouche dans ledit boîtier mécanique.  Advantageously and according to the invention, the oil outlet of said degasser opens into said mechanical housing.
Selon cette variante, l'huile extraite par le dégazeur peut servir à lubrifier les pièces mécaniques du boîtier mécanique.  According to this variant, the oil extracted by the degasser can be used to lubricate the mechanical parts of the mechanical housing.
L'invention concerne également un turbomoteur comprenant un système de déshuilage selon l'invention. Un turbomoteur selon l'invention équipé d'un système de déshuilage selon l'invention consomme donc moins d'huile qu'un turbomoteur de l'art antérieur par une récupération d'huile améliorée. Un turbomoteur selon l'invention présente un poids plus léger qu'un turbomoteur de l'art antérieur. La durée d'une mission d'un hélicoptère équipé de turbomoteurs selon l'invention est donc plus longue. En outre, les opérations de maintenance sont moins fréquentes. Enfin, l'impact écologique d'un turbomoteur selon l'invention est meilleur que celui des turbomoteurs de l'art antérieur. The invention also relates to a turbine engine comprising a deoiling system according to the invention. A turbine engine according to the invention equipped with a deoiling system according to the invention therefore consumes less oil than a turbine engine of the prior art by improved oil recovery. A turbine engine according to the invention has a lighter weight than a turbine engine of the prior art. The duration of a mission of a helicopter equipped with turbine engines according to the invention is therefore longer. In addition, maintenance operations are less frequent. Finally, the ecological impact of a turbine engine according to the invention is better than that of the turboshaft engines of the prior art.
L'invention concerne également un dégazeur et une turbomachine caractérisés en combinaison par tout ou partie des caractéristiques mentionnées ci- dessus ou ci-après.  The invention also relates to a degasser and a turbomachine characterized in combination by all or some of the characteristics mentioned above or below.
5. Liste des figures  5. List of figures
D'autres buts, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante donnée à titre uniquement non limitatif et qui se réfère aux figures annexées dans lesquelles :  Other objects, features and advantages of the invention will become apparent on reading the following description given solely by way of non-limiting example and which refers to the appended figures in which:
- la figure 1 est une vue schématique fonctionnelle d'un système de déshuilage d'un mélange air/huile de pressurisation d'étanchéités d'une turbomachine selon l'art antérieur,  FIG. 1 is a schematic functional view of a de-oiling system of an air / oil pressurization mixture of seals of a turbomachine according to the prior art,
- la figure 2 est une vue schématique fonctionnelle d'un système de déshuilage d'un mélange air/huile de pressurisation d'étanchéités d'une turbomachine selon l'invention,  FIG. 2 is a schematic functional view of a de-oiling system of an air / oil pressurization mixture of seals of a turbomachine according to the invention,
- la figure 3 est une vue schématique d'un dégazeur d'un système de déshuilage selon un mode de réalisation de l'invention.  FIG. 3 is a schematic view of a degasser of a deoiling system according to one embodiment of the invention.
6. Description détaillée d'un mode de réalisation de l'invention Sur les figures, les échelles et les proportions ne sont pas strictement respectées et ce, à des fins d'illustration et de clarté.  6. DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION In the figures, the scales and the proportions are not strictly adhered to for purposes of illustration and clarity.
Les mêmes références sont utilisées sur les différentes figures pour les différents éléments d'un système de déshuilage ayant une fonction identique ou de même nature.  The same references are used in the various figures for the different elements of a de-oiling system having an identical function or of the same nature.
On observe sur la figure 1, un arbre 10 d'une turbomachine équipée d'un système de déshuilage de l'art antérieur. Cet arbre 10 est par exemple la ligne d'arbres d'un générateur de gaz et d'une turbine libre d'un turbomoteur d'un hélicoptère. Un air pressurisé, représenté par des flèches 11 en traits continus, est injecté dans les étanchéités afin d'assurer l'étanchéité des enceintes pressurisées 13 de la turbomachine. Cet air 11 se charge en huile au cours de sa circulation dans les enceintes pressurisées 13. Sur la figure 1, on a représenté un mélange d'air et d'huile circulant le long de l'arbre 10 de la turbomachine. Les traits interrompus 11 représentent l'air et les traits pointillés 12 représentent l'huile du mélange. FIG. 1 shows a shaft 10 of a turbomachine equipped with a deoiling system of the prior art. This tree 10 is for example the line of trees of a gas generator and a free turbine of a turbine engine of a helicopter. Pressurized air, represented by arrows 11 in continuous lines, is injected into the seals in order to seal the pressurized vessels 13 of the turbomachine. This air 11 is charged with oil during its circulation in the pressurized vessels 13. In Figure 1, there is shown a mixture of air and oil flowing along the shaft 10 of the turbomachine. The broken lines 11 represent the air and the dashed lines 12 represent the oil of the mixture.
Selon l'art antérieur, le système de déshuilage du mélange air/huile des étanchéités 13 comprend un dégazeur 20 centrifuge qui est logé dans une boite 30 d'accessoires. Une telle boite 30 d'accessoires comprend une pluralité de pignons 21, 22 qui sont agencés les uns par rapport aux autres et reliés mécaniquement de sorte à pouvoir récupérer de la puissance mécanique sur l'arbre 10 de la turbomachine et fournir cette puissance mécanique à différentes servitudes nécessaires au fonctionnement de la turbomachine, et notamment au dégazeur centrifuge 20 pour assurer son entraînement en rotation.  According to the prior art, the de-oiling system of the air / oil mixture of the seals 13 comprises a centrifugal degasser which is housed in a box 30 of accessories. Such an accessory box 30 comprises a plurality of pinions 21, 22 which are arranged relative to each other and mechanically connected so as to be able to recover mechanical power from the shaft 10 of the turbomachine and to supply this mechanical power to different servitudes necessary for the operation of the turbomachine, and in particular the centrifugal degasser 20 to ensure its rotational drive.
La boite 30 accessoires comprend en outre un gicleur 32 destiné à fournir de l'huile 33 de lubrification des différentes pièces mécaniques logées dans la boite 30 accessoires, tels que notamment les pignons 21, 22. Ce gicleur 32 est alimenté en huile par une réserve 35 d'huile agencée à l'extérieur de la boite 30 d'accessoires.  The accessory box further comprises a nozzle 32 for supplying oil 33 for lubricating the various mechanical parts housed in the accessory box, such as in particular the pinions 21, 22. This nozzle 32 is supplied with oil by a reserve 35 of oil arranged outside the box 30 of accessories.
Selon l'art antérieur, le mélange air/huile nécessaire aux étanchéités des enceintes pressurisées 13 est directement injecté dans la boite 30 accessoires de sorte que le dégazeur traite l'ensemble formé du mélange air/huile des enceintes pressurisées 13 et du brouillard 39 d'huile présent dans la boite accessoires formé notamment par l'huile 33 émise par le gicleur 32 pour la lubrification des pièces mécaniques.  According to the prior art, the air / oil mixture necessary for the seals of the pressurized enclosures 13 is directly injected into the accessory box so that the degasser treats the assembly formed of the air / oil mixture of the pressurized enclosures 13 and the fog 39. oil present in the accessory box formed in particular by the oil 33 emitted by the nozzle 32 for the lubrication of mechanical parts.
La figure 2 représente de manière très schématique la configuration du système de déshuilage selon un mode de réalisation de l'invention. Selon l'invention, le mélange air/huile des enceintes pressurisées 13 de la turbomachine n'est plus injecté directement dans la boite 30 accessoires, mais est guidé directement vers l'entrée 27 du dégazeur par l'intermédiaire d'une conduite 40 qui relie les enceintes pressurisées 13 à l'entrée 27 du dégazeur. Cette conduite 40 permet ainsi d'isoler le mélange air/huile issu des enceintes pressurisées 13 par rapport au brouillard 39 d'huile présent dans la boite 30 accessoires. FIG. 2 very schematically shows the configuration of the deoiling system according to one embodiment of the invention. According to the invention, the air / oil mixture of the pressurized housings 13 of the turbomachine is no longer injected directly into the accessory box, but is guided directly to the inlet 27 of the degasser through a pipe 40 which connects the pressurized speakers 13 to the inlet 27 of the degasser. This line 40 thus makes it possible to isolate the air / oil mixture originating from the pressurized enclosures 13 with respect to the mist 39 of oil present in the accessory box.
L'agencement de cette conduite 40 entre la sortie des enceintes pressurisées 13 et l'entrée 27 du dégazeur empêche donc que le brouillard d'huile de la boite 30 enrichisse en huile le mélange air/huile des enceintes pressurisées 13 à séparer par le dégazeur 20.  The arrangement of this pipe 40 between the output of the pressurized enclosures 13 and the inlet 27 of the degasser therefore prevents the oil mist of the can 30 enrich oil in the air / oil mixture of the pressurized enclosures 13 to be separated by the degasser 20.
Le dégazeur 20 comprend en outre une sortie 28 d'huile extraite du mélange et une sortie 29 d'air déshuilé.  The degasser 20 further comprises an oil outlet 28 extracted from the mixture and an outlet 29 of deoiled air.
Selon un mode de réalisation de l'invention, la sortie 28 d'huile est directement reliée à l'intérieur de la boite 30 accessoires de manière à pouvoir lubrifier les pièces mécaniques de la boite.  According to one embodiment of the invention, the oil outlet 28 is directly connected to the inside of the accessory box 30 so as to be able to lubricate the mechanical parts of the box.
Selon un autre mode de réalisation non représenté, l'huile extraite du mélange est injectée dans la réserve 35 d'huile.  According to another embodiment not shown, the oil extracted from the mixture is injected into the oil reserve.
Cette conduite peut par exemple traverser la boite 30 d'accessoires de telle sorte que le dégazeur 20 reste logé dans la boite d'accessoires.  This conduit may for example pass through the accessory box 30 so that the degasser 20 remains housed in the accessory box.
Selon un autre mode de réalisation non représenté, le dégazeur est logé à l'extérieur de la boite d'accessoires et son entraînement en rotation est obtenu par un arbre qui traverse la boite 30 d'accessoires. L'alimentation en mélange peut être soit réalisée par une conduite telle que celle décrite en lien avec le mode de réalisation de la figure 2, soit par diffusion directe du mélange dans l'entrée du dégazeur.  According to another embodiment not shown, the degasser is housed outside the accessory box and its rotation drive is obtained by a shaft which passes through the box 30 of accessories. The mixing feed may be either carried out by a pipe such as that described in connection with the embodiment of FIG. 2, or by direct diffusion of the mixture into the inlet of the degasser.
Selon une autre variante représentée sur la figure 3, l'alimentation du dégazeur 20 en mélange air/huile est réalisée par l'intermédiaire de l'arbre 52 d'entraînement du dégazeur. Cet arbre 52 d'entraînement est creux de telle manière qu'une extrémité 53 de l'arbre peut recevoir le mélange à traiter et l'autre extrémité 54 de l'arbre opposée permet l'évacuation du mélange d'air déshuilé. Une cloison 70 aménagée dans l'arbre creux 52 permet en outre de séparer l'entrée 53 de la sortie 54 et force ainsi le passage du mélange d'air dans les enceintes 58a, 58b du dégazeur. La circulation du mélange en provenance de la turbine, c'est-à-dire de l'arbre 10 à l'entrée 53 du dégazeur est schématisée par les flèches 59 sur la figure 3. According to another variant shown in FIG. 3, the feed of the degasser 20 in an air / oil mixture is carried out via the drive shaft 52 of the degasser. This drive shaft 52 is hollow such that one end 53 of the shaft can receive the mixture to be treated and the other end 54 of the opposite shaft allows the evacuation of the deoiled air mixture. A partition 70 arranged in the hollow shaft 52 further allows the inlet 53 to be separated from the outlet 54 and thus forces the passage of the air mixture into the enclosures 58a, 58b of the degasser. The circulation of the mixture from the turbine, that is to say, the shaft 10 at the inlet 53 of the degasser is shown schematically by the arrows 59 in Figure 3.
Selon ce mode de réalisation, le dégazeur est en outre entraîné en rotation par l'intermédiaire d'un pignon 60 monté solidairement sur l'arbre creux 52 et entraîné en rotation par l'arbre 10.  According to this embodiment, the degasser is further rotated by means of a pinion 60 mounted integrally on the hollow shaft 52 and rotated by the shaft 10.
Sur la figure 3, on observe également que le dégazeur comprend deux enceintes de dégazage agencées sur son arbre d'entraînement, une enceinte 58a destinée à traiter le mélange air/huile issu des étanchéités et prélevé dans un carter d'entrée d'air comme décrit précédemment, et une enceinte 58b destinée à traiter le brouillard d'huile présent à l'intérieur de la boite accessoires. Selon une autre variante, le dégazeur peut ne comprendre qu'une enceinte de dégazage.  In FIG. 3, it is also observed that the degasser comprises two degassing chambers arranged on its drive shaft, an enclosure 58a intended to treat the air / oil mixture resulting from the seals and taken from an air inlet casing as described above, and a chamber 58b for treating the oil mist present inside the accessory box. According to another variant, the degasser may comprise only a degassing enclosure.

Claims

REVENDICATIONS
1. Système de déshuilage d'un mélange air/huile (11, 12) de pressurisation d'enceintes pressurisées (13) d'une turbomachine, ledit système comprenant : A de-oiling system for an air / oil mixture (11, 12) for pressurizing pressurized vessels (13) of a turbomachine, said system comprising:
- au moins un dégazeur (20) centrifuge comprenant une enceinte de séparation dudit mélange agencé autour d'un arbre (52) d'entraînement, une entrée (27, 53) de mélange dans ladite enceinte, une sortie d'air (29, 54) déshuilé et une sortie d'huile (28) extraite dudit mélange,  at least one centrifugal degasser (20) comprising a separation chamber of said mixture arranged around a driving shaft (52), a mixing inlet (27, 53) in said chamber, an air outlet (29, 54) deoiled and an oil outlet (28) extracted from said mixture,
- au moins un boîtier (30) mécanique de la turbomachine comprenant une pluralité de pièces (21, 22) mécaniques dont au moins une est reliée mécaniquement audit arbre d'entraînement dudit dégazeur (20) de manière à pouvoir l'entraîner en rotation, ledit boîtier (30) étant configuré pour pouvoir contenir un brouillard (39) d'huile de lubrification desdites pièces (21, 22) mécaniques,  at least one mechanical casing (30) of the turbomachine comprising a plurality of mechanical parts (21, 22) of which at least one is mechanically connected to said drive shaft of said degasser (20) so as to be able to drive it in rotation, said housing (30) being configured to be able to contain a fog (39) of lubricating oil of said mechanical parts (21, 22),
caractérisé en ce que ledit système de déshuilage comprend en outre des moyens (40) d'isolement dudit mélange air/huile (11, 12) par rapport audit brouillard (39) d'huile dudit boîtier (30) mécanique de telle sorte que ledit brouillard (39) d'huile dudit boîtier (30) mécanique ne puisse pas enrichir en huile ledit mélange à séparer par ledit dégazeur, et en ce qu'il comprend un dégazeur (20) double configuré pour pouvoir traiter dans une première enceinte (58a) l'air des enceintes pressurisées (13) et dans une deuxième enceinte (58b), l'air du boîtier mécanique (30). characterized in that said de-oiling system further comprises means (40) for isolating said air / oil mixture (11, 12) with respect to said oil mist (39) from said mechanical housing (30) such that said mist (39) of oil of said mechanical housing (30) can not enrich oil said mixture to be separated by said degasser, and in that it comprises a double degasser (20) configured to be able to process in a first chamber (58a ) the air pressurized speakers (13) and in a second chamber (58b), the air of the mechanical housing (30).
2. Système selon la revendication 1, caractérisé en ce que lesdits moyens d'isolement dudit mélange comprennent une conduite (40) reliant directement une sortie desdites enceintes pressurisées (13) à ladite entrée (27, 53) dudit mélange dans ladite enceinte dudit dégazeur (20) de telle sorte que ledit mélange de pressurisation des enceintes pressurisées alimente directement ledit dégazeur sans interaction avec ledit brouillard (39) d'huile du boîtier mécanique.  2. System according to claim 1, characterized in that said means for isolating said mixture comprise a pipe (40) directly connecting an output of said pressurized enclosure (13) to said inlet (27, 53) of said mixture in said enclosure of said degasser (20) such that said pressurizing mixture of the pressurized enclosures directly feeds said degasser without interaction with said oil mist of the mechanical housing.
3. Système selon la revendication 2, caractérisé en ce que ledit dégazeur (20) est logé dans ledit boîtier (30) mécanique et en ce que ladite conduite (40) traverse ledit boîtier (30) mécanique. 3. System according to claim 2, characterized in that said degasser (20) is housed in said housing (30) mechanical and in that said pipe (40) passes through said housing (30) mechanical.
4. Système selon la revendication 3, caractérisé en ce que ledit arbre (52) d'entraînement dudit dégazeur est creux et forme au moins une portion de ladite conduite (40) reliant lesdites enceintes pressurisées de la turbomachine à l'entrée 4. System according to claim 3, characterized in that said drive shaft (52) of said degasser is hollow and forms at least a portion of said pipe (40) connecting said pressurized chambers of the turbomachine to the inlet
5. Système selon la revendication 2, caractérisé en ce que ledit dégazeur (20) est agencé entre le boîtier (30) mécanique et un carter d'entrée d'air d'un compresseur de la turbomachine. 5. System according to claim 2, characterized in that said degasser (20) is arranged between the housing (30) mechanical and an air intake casing of a compressor of the turbomachine.
6. Système selon la revendication 1, caractérisé en ce que ledit dégazeur (20) est agencé à l'extérieur dudit boîtier (30) mécanique et en ce que ledit arbre (52) d'entraînement dudit dégazeur traverse ledit boîtier (30) mécanique, ledit boîtier (30) mécanique formant lesdits moyens d'isolement dudit mélange par rapport au brouillard d'huile du boîtier mécanique (30).  6. System according to claim 1, characterized in that said degasser (20) is arranged outside said mechanical housing (30) and in that said drive shaft (52) of said degasser passes through said mechanical housing (30). said mechanical housing (30) forming said means for isolating said mixture from the oil mist of the mechanical housing (30).
7. Système selon la revendication 7, caractérisé en ce que ledit dégazeur (20) est agencé entre le boîtier (30) mécanique et un carter d'entrée d'air d'un compresseur de la turbomachine.  7. System according to claim 7, characterized in that said degasser (20) is arranged between the housing (30) mechanical and an air intake casing of a compressor of the turbomachine.
8. Système selon l'une des revendications 1 à 8, caractérisé en ce que ledit boîtier (30) mécanique est un boîtier réducteur ou un boîtier accessoires de la turbomachine.  8. System according to one of claims 1 to 8, characterized in that said housing (30) is a mechanical gear box or an accessory housing of the turbomachine.
9. Système selon l'une des revendications 1 à 9, caractérisé en ce que ladite sortie d'évacuation d'huile dudit dégazeur débouche dans ledit boîtier (30) mécanique.  9. System according to one of claims 1 to 9, characterized in that said oil outlet outlet of said degasser opens into said housing (30) mechanical.
10. Système selon l'une des revendications 1 à 9, caractérisé en ce que ladite sortie d'évacuation d'huile dudit dégazeur débouche dans une réserve d'huile (35).  10. System according to one of claims 1 to 9, characterized in that said oil discharge outlet of said degasser opens into an oil reservoir (35).
11. Turbomachine comprenant un système de déshuilage selon l'une des revendications 1 à 10. 11. Turbomachine comprising a deoiling system according to one of claims 1 to 10.
EP17783936.2A 2016-09-26 2017-09-22 System for deoiling an air-oil mixture for pressurising seals of a turbine engine Withdrawn EP3516177A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1659017A FR3056635B1 (en) 2016-09-26 2016-09-26 SYSTEM FOR DEHUILING AN AIR / OIL MIXTURE FOR PRESSURIZING SEALS OF A TURBOMACHINE
PCT/FR2017/052542 WO2018055299A1 (en) 2016-09-26 2017-09-22 System for deoiling an air-oil mixture for pressurising seals of a turbine engine

Publications (1)

Publication Number Publication Date
EP3516177A1 true EP3516177A1 (en) 2019-07-31

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EP17783936.2A Withdrawn EP3516177A1 (en) 2016-09-26 2017-09-22 System for deoiling an air-oil mixture for pressurising seals of a turbine engine

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EP (1) EP3516177A1 (en)
JP (1) JP2019534971A (en)
KR (1) KR20190049813A (en)
CN (1) CN109790759A (en)
CA (1) CA3037665A1 (en)
FR (1) FR3056635B1 (en)
RU (1) RU2745767C2 (en)
WO (1) WO2018055299A1 (en)

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FR3105298B1 (en) * 2019-12-20 2021-12-03 Safran Helicopter Engines AIRCRAFT TURBOGENERATOR, INCLUDING AN IMPROVED OIL SYSTEM

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JP4010032B2 (en) * 1997-10-13 2007-11-21 株式会社Ｉｈｉ Apparatus for separating oil droplets from cooled pressurized air in a gas turbine engine
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GB0206243D0 (en) * 2002-03-16 2002-05-01 Rolls Royce Plc An air/oil separator
EP1880085B2 (en) * 2005-05-10 2013-10-09 Mahle International GmbH Centrifugal oil mist separation device integrated in an axial hollow shaft of an internal combustion engine
FR2936273B1 (en) * 2008-09-22 2010-10-29 Snecma METHOD AND SYSTEM FOR LUBRICATING A TURBOMACHINE
FR2965299B1 (en) * 2010-09-23 2012-10-05 Snecma SYSTEM FOR PRESSURIZING TURBOMACHINE BEARING ENCLOSURES BY AIR FROM THE INLET HANDLE.
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FR3007463B1 (en) * 2013-06-21 2017-10-20 Hispano-Suiza TURBOMACHINE ACCESSORY BOX EQUIPPED WITH AIR / OIL SEPARATOR
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RU2019110417A (en) 2020-10-26
WO2018055299A1 (en) 2018-03-29
JP2019534971A (en) 2019-12-05
CA3037665A1 (en) 2018-03-29
CN109790759A (en) 2019-05-21
RU2745767C2 (en) 2021-03-31
RU2019110417A3 (en) 2021-01-27
US20200018184A1 (en) 2020-01-16
FR3056635A1 (en) 2018-03-30
FR3056635B1 (en) 2020-05-29
KR20190049813A (en) 2019-05-09

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