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
  • F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
• • 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
  • 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
  • F01M11/04—Filling or draining lubricant of or from machines or engines
• • 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
  • F05D2260/602—Drainage
• • 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
  • F16N2210/00—Applications
  • F16N2210/02—Turbines

Definitions

• the present disclosure relates to the field of drained liquid collectors for aircraft turbomachines.
• the collector is often configured to direct the collected liquid towards the recovery outlet as long as the quantity of drained liquid which arrives in the internal cavity of the collector is not very high, which allows the drained liquid to be reused.
• the recovery outlet is provided with a means of restricting the passage of the drained liquid arranged at the interface between the interior of the collector and the exterior of the collector.
• the passage restriction means forms a nozzle measuring the flow rate of drained liquid which leaves the collector through the recovery outlet.
• the nozzle controls the flow of drained liquid leaving the collector.
• the nozzle opposes a resistance to the flow of the drained liquid which depends on a pressure difference across the nozzle terminals. This being arranged at the interface between the interior and exterior of the collector, the pressure difference at the terminals of the nozzle is equivalent to a pressure difference between the interior and exterior of the collector. [0006] When the pressure difference across the nozzle increases sufficiently, the resistance to flow of the nozzle is compensated, the drained liquid being able to flow through it.
• the pressure difference across the nozzle turns out to depend solely on the quantity of liquid collected in the internal cavity of the collector, so that the flow rate of liquid leaving through the nozzle is proportional to the quantity of liquid in the nozzle. collector. Also, if the flow rate of liquid leaving the nozzle is very high, this means that the quantity of liquid in the collector is very high, which can help identify a turbomachine failure.
• the conditions of use of the collector such as the increase in the air pressure in the internal cavity of the collector or the inlet flow rate of liquid drained into the internal cavity, as well as the installation conditions of the collector, for example the length of the pipes leaving the collector, also have an impact on the pressure difference at the nozzle terminals.
• Such parameters therefore modify the relationship between the quantity of liquid drained into the internal cavity and the flow rate of drained liquid leaving through the recovery outlet, which can lead to erroneously detecting a failure of the turbomachine or not identifying a malfunction. real of it.
• a collector of a drained liquid is proposed for an aircraft turbomachine of a first type, the collector comprising:
• an internal cavity comprising a first space for collecting the drained liquid and a second space for transferring the collected liquid to a recovery outlet;
• - at least one recovery outlet communicating fluidly with the second space; in which the first space and the second space are separated from each other by a liquid-tight partition in which is arranged a means for restricting the passage of the liquid drained from the first space to the second space, the first space communicating with the air with the second space so that the air pressure is the same in the first space and in the second space.
• the air pressure being identical in the first space and in the second space, the pressure difference across the means for restricting the passage of the drained liquid depends solely on the height of the drained liquid collected in the first space.
• the present document also relates to a collector of a drained liquid for an aircraft turbomachine of the second type, the collector comprising:
• an internal cavity comprising a first space for collecting the drained liquid and a second space for transferring the collected liquid to a recovery outlet, the internal cavity extending longitudinally in a first direction between a first end closed by a bottom wall of the collector and a second end closed by a collector cover;
• - at least one recovery outlet communicating fluidly with the second space; in which the first space and the second space are separated from each other by a liquid-tight partition in which is arranged a means for restricting the passage of the liquid drained from the first space to the second space in which the means for restricting passage of the drained liquid is mounted removable relative to the collector by moving the means for restricting the passage of the drained liquid in the first direction in the direction going from the bottom wall of the collector to the cover of the collector.
• the partition is thin-walled.
• thin wall we mean that the thickness of the partition is less than 1.5 mm, preferably less than 1 mm.
• the internal cavity 54 comprises a first space 54A and a second space 54B separated by a partition 56.
• the partition 56 which will be described in more detail later, is preferably thin-walled.
• thin wall we mean that the thickness of the partition 56 is less than 1.5 mm, preferably less than 1 mm.
• each inlet 44 of the collector communicates fluidly with the first space 54A.
• the drained liquid is thus collected initially in the first space 54A, which will also subsequently be called collection space 54A.
• the second space 54B communicates fluidly with the recovery outlet 30.
• the second space 54B transfers the liquid collected in the collection space 54A towards the recovery outlet 30.
• the second space 54B will also be called transfer space 54B.
• the recovery outlet 30 comprises a connection 30A making it possible to connect to the collector 10 a conduit (not illustrated) extending between the collector and another part of the turbomachine, such as the fuel tank or the so-called “ecological” collection box described previously. The drained liquid can thus be recovered from the collector 10 and sent to other parts of the turbomachine for its storage or reuse.
• the partition 56 When several orifices pass through the partition 56, they can be arranged at the same height relative to the bottom wall 16 of the collector 10 or at different heights. When each orifice of the partition 56 is arranged at a different height, the law of flow of the liquid drained between the collection space 54A and the transfer space 54B is different for each orifice. In particular, the further the orifice of the partition 56 is from the bottom wall 16 of the collector 10, the slower the flow of the drained liquid. On the one hand, the further the orifice of the partition is from the bottom wall 16, the greater the quantity of drained liquid collected in the collection space must be large to initiate flow of drained liquid through this orifice. On the other hand, if other orifices are arranged closer to the bottom wall 16, the drained liquid flows preferentially through them.
• the orifice(s) included in the means for restricting the passage of the drained liquid is(are) arranged in an attached nozzle (not illustrated) installed in an opening of the partition.
• the restriction means 58 can be moved in the direction Z independently of the partition 56 or integrally with this partition 56 as will be detailed.
• the partition 56 forms a separation wall extending substantially vertically into the internal cavity 54 from the bottom wall 16 of the collector.
• the separation wall 56 can be attached to the bottom wall 16, in a fixed manner or in a removable manner.
• the restriction means 58 can be extracted from the collector 10 by vertical movement of the separation wall 56 in the direction going from the bottom wall 16 to the cover 14 Alternatively, the separation wall 56 can be formed in one piece with the bottom wall 16 of the collector.
• the separation wall 56 comprises a main wall extending radially opposite a portion of the internal face 32 of the side wall 18 of the body 12, and two secondary walls (not shown) which connect radially the ends of the main wall to the internal face 32 of the side wall 18.
• the transfer space 54B is then delimited between the separation wall 56 and the internal face 32 of the side wall 18.
• the separation wall 56 is arranged in the internal cavity 54 so that the entry into the second cavity 26 is included in the transfer space 54B.
• the separation wall 56 does not extend as far as the cover 14, which allows the collection space 54A to communicate with the air with the transfer space 54B.
• the air pressure in the collection space 54A and in the transfer space 54B is therefore identical.
• restriction means 58 is arranged on an end part of the separation wall 56 which is connected at its end to the bottom wall 16 of the collector 10.
• the tube 60 extends in a longitudinal direction L1.
• the longitudinal direction L1 is substantially parallel to the axis A1 of the collector 10.
• the tube 60 is hollow and substantially cylindrical, with a circular or polygonal cross section.
• the tube 60 comprises a first end part 60A and a second end part 60B connected together by an intermediate part 60C.
• the first end portion 60A of the tube 60 carries the passage restriction means 58.
• the passage restriction means 58 comprises a single orifice 58A, but it could comprise several orifices. According to a non-limiting example, each orifice 58A can be included in a nozzle attached to an opening, as indicated previously.
• the first end portion 60A of the tube 60 comprises an insertion portion 62.
• the insertion portion is shaped to be inserted into a housing in the bottom wall of the collector 16, as visible in Figure 2.
• the rear wall housing communicates fluently with the recovery outlet 30.
• the housing of the bottom wall 16 corresponds to the first portion 26A of the cavity 26.
• the insertion portion 62 is mounted adjusted in the housing 26A.
• the insertion portion 62 advantageously comprises a groove 64, preferably annular, in which is mounted an annular seal 66, visible in Figure 6.
• the seal 66 ensures the sealing of the assembly of the tube 60 in the housing 26A of the bottom wall 16.
• the seal 66 limits the flow of the liquid drained between the surface of the housing 26A and the insertion portions 62.
• the sealing of the tube assembly can be a facial seal by seal or by metal-to-metal contact.
• the tube 60 is mounted in the housing 26A in a removable manner. This makes it possible to extract the tube 60 from the internal cavity 54 of the collector 10 by moving it in the direction Z in the direction going from the bottom wall 16 towards the cover 14, as indicated previously. It is thus possible to clean the passage restriction means 58 and monitor that it is not clogged, as also explained above.
• the first end part 60A further comprises a stop member 68 on the bottom wall 16.
• the stop member 68 projects radially towards the outside of the tube 60 relative to the insertion portion 62 Also, when the insertion portion 62 of the tube 60 is inserted into the housing 26A, the stop member 68 abuts against the internal face of the bottom wall 16.
• the stop member 68 is a collar, but any other shape projecting radially outwards from the tube 60 relative to the insertion portion 62 is possible.
• the stop member 68 is arranged between the passage restriction means 58 and the insertion portion 62. This makes it possible to guarantee that the passage restriction means 58 is arranged at a height between the bottom wall 16 of the collector and the cover 14 of the collector, which prevents, as indicated above, that it is positioned in a zone of accumulation of impurities favoring its clogging.
• the second end part 60B carries at least one pressure balancing orifice 70 communicating the air of the collection space 54A and the air of the transfer space 54B.
• the balancing orifice 70 passes through the tube 60 between the first space 54A and the second space 54B of the internal cavity 54.
• the second end part carries a plurality of balancing orifices 70 distributed equidistantly around the longitudinal direction L1 of the tube 60.
• the second end part of the tube 60 carries six balancing holes 70.
• Each pressure balancing orifice is dimensioned so as to allow the pressure in the collection space 54A to be identical to the pressure in the transfer space 54B.
• a diameter of each balancing orifice is greater than a diameter of the passage restriction means 58, in particular of the orifice 58A.
• each balancing hole has a diameter greater than 1.5 mm and less than 3 mm.
• the diameter of each balancing orifice is between 1.7 mm and 2.5 mm.
• the diameter of each balancing hole is equal to 2 mm.
• the second end part 60B of the tube 60 is preferably connected to the cover 14.
• the second end part 60B comprises a connecting pin 72
• the cover 14 comprises a cap 74 visible in Figures 2 and 6.
• the pin 72 and the cap 74 have complementary shapes, which makes it possible to block the pin 72 in the cap 74.
• the tube 60 could also pass through the cover 14, in particular the wall 40 thereof. The tube 60 can thus be centered and/or fixed on the cover 14.
• the collection space 54A further comprises an overflow conduit 76.
• a first end of the overflow conduit 76 is connected to the evacuation outlet 28.
• the overflow conduit solid 76 therefore communicates fluidly with the evacuation outlet 28.
• This evacuation outlet includes a connection 28A which makes it possible to connect to the collector 10 a conduit (not illustrated) communicating the collector 10 with the exterior of the turbomachine.
• a second end of the overflow conduit 76 comprises an admission inlet 78 for the liquid collected in the collection space 54A.
• the intake inlet 78 is arranged vertically at a height relative to the bottom wall 16 of the collector between the height of the restriction means 58 and the balancing orifice(s) 70.
• the intake inlet 78 is arranged vertically at a height between the orifice of the restriction means 58 furthest vertically from the bottom wall 16 and the orifice(s) ) balancing 70.
• the height of the intake inlet 78 defines a level called “overflow level”.
• the overflow conduit 76 extends in the Z direction, but any other shape of the overflow conduit is possible provided that the admission inlet 78 is placed in the collection space 54A and the first end of the overflow conduit 76 is fluidly connected to the evacuation outlet 28.
• the drained liquid arrives in the collection space 54A through one of the inlets 54A.
• the height of the liquid drained into the collection space 54A gradually increases.
• the height of the drained liquid is measured vertically relative to the bottom wall 16 of the collector 10.
• the flow rate of drained liquid which arrives in the collection space 54A is greater than the flow rate of drained liquid which flows through the restriction means 58, the height of the liquid drained into the cavity exceeds the height of the means restriction 58 and can wait for the overflow level. In this case, the drained liquid also begins to flow through the overflow conduit 76 towards the discharge outlet 28. The drained liquid is therefore discharged outside the turbomachine, which may indicate a turbomachine failure.
• the present invention also relates to a turbomachine, such as a turbojet or a turboprop, comprising at least one manifold 10 as described above.
• the pressure difference across the flow restriction means 58 being independent of the installation conditions of the collector 10 and the conditions of use thereof, in particular the air pressure in the cavity internal 54, it is possible to control the flow rate of drained liquid beyond which there is an overflow thereof by the overflow conduit 76. This therefore makes it possible to control a leak rate threshold of liquid drained beyond from which the failure of the turbomachine is detected by the overflow of the liquid drained through the overflow conduit 76.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Separating Particles In Gases By Inertia (AREA)
• Jet Pumps And Other Pumps (AREA)

Applications Claiming Priority (2)

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ID=81927583

Family Applications (1)

Country Status (4)

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• 2022
  • 2022-04-25 FR FR2203832A patent/FR3134845B1/fr active Active
• 2023
  • 2023-04-24 EP EP23725372.9A patent/EP4515084A1/de active Pending
  • 2023-04-24 WO PCT/FR2023/000047 patent/WO2023209284A1/fr not_active Ceased
  • 2023-04-24 CN CN202380039592.5A patent/CN119173683A/zh active Pending

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