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

Applications Claiming Priority (2)

Publications (1)

Family

ID=57906720

Family Applications (1)

Country Status (9)

Families Citing this family (1)

Family Cites Families (11)

• 2016
  • 2016-09-26 FR FR1659017A patent/FR3056635B1/fr active Active
• 2017
  • 2017-09-22 KR KR1020197009948A patent/KR20190049813A/ko not_active Application Discontinuation
  • 2017-09-22 CN CN201780059167.7A patent/CN109790759A/zh active Pending
  • 2017-09-22 RU RU2019110417A patent/RU2745767C2/ru active
  • 2017-09-22 WO PCT/FR2017/052542 patent/WO2018055299A1/fr unknown
  • 2017-09-22 CA CA3037665A patent/CA3037665A1/fr not_active Abandoned
  • 2017-09-22 JP JP2019515641A patent/JP2019534971A/ja active Pending
  • 2017-09-22 US US16/335,459 patent/US20200018184A1/en not_active Abandoned
  • 2017-09-22 EP EP17783936.2A patent/EP3516177A1/de not_active Withdrawn

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