EP4409114A1 - Turbine à gaz haute-pression pour une turbomachine et turbomachine - Google Patents
Turbine à gaz haute-pression pour une turbomachine et turbomachineInfo
- Publication number
- EP4409114A1 EP4409114A1 EP22786385.9A EP22786385A EP4409114A1 EP 4409114 A1 EP4409114 A1 EP 4409114A1 EP 22786385 A EP22786385 A EP 22786385A EP 4409114 A1 EP4409114 A1 EP 4409114A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- annular
- downstream
- spoiler
- upstream
- radially
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
-
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/001—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between stator blade and rotor
-
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
-
- 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
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
-
- 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
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
- F05D2220/321—Application in turbines in gas turbines for a special turbine stage
- F05D2220/3212—Application in turbines in gas turbines for a special turbine stage the first stage of a turbine
-
- 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
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
-
- 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
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
- F05D2240/126—Baffles or ribs
-
- 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
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
- F05D2240/127—Vortex generators, turbulators, or the like, for mixing
-
- 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
- F05D2240/00—Components
- F05D2240/55—Seals
-
- 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
- F05D2250/00—Geometry
- F05D2250/10—Two-dimensional
- F05D2250/18—Two-dimensional patterned
- F05D2250/185—Two-dimensional patterned serpentine-like
Definitions
- This description relates to a high-pressure gas turbine for a turbomachine. It also relates to a turbomachine comprising such a gas turbine.
- a turbomachine 10 of the turbofan turbojet type comprises, from upstream to downstream in the direction of the circulation of the gases inside the turbomachine 10, a fan 14, a low-pressure compressor 16, a high-pressure compressor 18, a combustion chamber 20, a high-pressure turbine 22, a low-pressure turbine 24 and an exhaust nozzle 26.
- the low-pressure compressor 16 , the high-pressure compressor 18, the combustion chamber 20, the high-pressure turbine 22, the low-pressure turbine 24 and the exhaust nozzle 26 are arranged radially inside a casing 12 which delimits, radially outwards, an annular stream 11 of the turbine engine 10 in which the gases flow from upstream to downstream.
- the high-pressure compressor 14 and the low-pressure compressor 18 are respectively connected to a high-pressure turbine 22 and a low-pressure turbine 24 by a respective shaft 15, 17 extending along the longitudinal axis X of rotation of the shafts of the turbomachine 10.
- orientation qualifiers such as “longitudinal”, “radial” and “circumferential” are defined with reference to the longitudinal axis.
- upstream and downstream are defined with respect to the direction of circulation of the gases within the turbomachine.
- the high-pressure turbine 22 comprises a plurality of stages, one of them being partially shown in Figure 2, each comprising a distributor 30 and a moving wheel 40 mounted downstream of the distributor 30.
- the distributor 30 comprises an internal annular platform 34 and an annular row of fixed vanes 32. Each fixed vane 32 extends radially in the annular vein 11 and is connected, radially inside to the internal annular platform 34
- the distributor 30 generally comprises an annular radial flange 36 for attachment to the casing 5.
- the moving wheel 40 comprises an annular row of moving blades 42 carried by a disc 41 comprising a plurality of cells on its outer periphery, each receiving a foot 46 of a blade 42.
- Each moving blade 42 further comprises a sector of internal annular platform 44 of the impeller 40 from which extends a blade 42' radially outwards through the annular vein 11.
- the internal annular platform 44 thus comprises a plurality of sectors arranged circumferentially end to end around the longitudinal axis X.
- the internal annular platform 34 of the distributor 30 and the internal annular platform 44 of the impeller 40 each delimit, radially inwards, the annular vein 11.
- the gases flowing in the annular stream 11 are introduced into a space formed longitudinally between the internal annular platform 34 of the distributor 30 and the internal annular platform 44 of the impeller 40, which reduces the performance of the turbomachine 10.
- a baffle is formed in the longitudinal space between the internal annular platform 34 of the distributor 30 and the internal annular platform 44 of the movable wheel 44, limiting the leak, radially inward, gases flowing in the annular vein 11.
- a purge air flow taken from the low-pressure compressor 14 and/or the high-pressure compressor 16, is directed through an annular purge cavity 62 towards the space formed longitudinally between the internal annular platform 34 of the distributor 30 and the internal annular platform 44 of the impeller 4.
- This purge air flow thus makes it possible to redirect the gases that have entered the purge cavity 62 towards the annular vein 11.
- This disclosure improves the situation.
- a high-pressure gas turbine is proposed for a turbomachine extending around a longitudinal axis, the turbine comprising: - a distributor comprising an internal annular platform and an annular row of fixed vanes, each fixed vane being connected, radially inwards, to the internal annular platform,
- the downstream sealing part comprising an upstream spoiler arranged, at least part, radially inside the internal annular platform of the distributor, the upstream sealing part comprising a first downstream spoiler, arranged, in whole or in part, radially inside the upstream spoiler of the upstream sealing part, the first downstream spoiler forming a radially outward projection of the sealing part, a radially outer end of said first downstream spoiler being arranged radially opposite said upstream spoiler, thus forming a first annular recirculation cavity which is delimited , longitudinally, by the distributor and the first downstream spoiler, the upstream sealing part comprising a second downstream spoiler forming a projection downstream, the second downstream spoiler being arranged radially nt inside the first downstream spoiler, the downstream sealing part comprising an upstream face extending radially and devoid of a spoiler interposed
- the arrangement of the first downstream spoiler delimiting the first annular recirculation cavity allows the formation of a whirlpool, or vortex, of the gases of the annular vein which are introduced into the first annular recirculation cavity, these gases mixing with a flow of purge air coming from the second annular recirculation cavity and from the annular purge cavity.
- a vortex makes it possible, on the one hand, to limit, or even to prevent, the gases of the annular stream from flowing more radially inwards, and on the other hand, to redirect these gases towards the annular stream.
- the vortex impedes a flow, radially inward, of the gases coming from the annular vein.
- the gases coming from the annular stream being introduced into the first annular recirculation cavity are thus advantageously mainly contained in the first annular recirculation cavity.
- the second annular recirculation cavity also allows the formation of a vortex, or vortex, of the gases coming from the first annular recirculation cavity which are introduced into the secondary annular recirculation cavity, these gases mixing with a flow purge air from the annular purge cavity.
- a vortex makes it possible to limit, or even prevent, the gases from flowing more radially inwards, and on the other hand, to redirect these gases towards the first annular recirculation cavity.
- the vortex here obstructs a flow, radially inward, of the gases coming from the first annular recirculation cavity.
- the gases coming from the first annular recirculation cavity entering the second annular recirculation cavity are thus advantageously mainly contained in the secondary annular recirculation cavity.
- the characteristic that the first downstream spoiler projects radially outwards from the sealing part is equivalent, in other words, to the fact that the first downstream spoiler extends radially outwards from a annular part of the sealing part.
- the first downstream spoiler can extend from a radially outer end of the annular part of the sealing part.
- the characteristic according to which the second downstream spoiler forms a projection towards the downstream of the sealing part is equivalent, in other words, to the fact that the second spoiler downstream extends longitudinally downstream from an annular part of the sealing piece.
- a so-called annular part may comprise a plurality of sectors arranged circumferentially end to end around an axis, in particular at 360° around said axis.
- a so-called annular part can also be one-piece, that is to say formed from a single part and not from sectors.
- the first annular recirculation cavity can be delimited radially outwards by a radially internal face of the internal annular platform of the distributor.
- the first annular recirculation cavity may form a free space.
- the first annular recirculation cavity may be devoid of any solid element.
- the second annular recirculation cavity can form a free space.
- the second annular recirculation cavity may be devoid of any solid element.
- the clearance between the inner platform and the upstream spoiler may be a radially extending annular clearance. This play can be between 1 and 4.5 mm, .
- the clearance between the first downstream spoiler and the upstream spoiler may be a radially extending annular clearance. This play can be between 0.5 and 3 mm, .
- the clearance between the second downstream spoiler and the downstream sealing part may be an annular clearance extending axially. This game can be between 1.5 and 6 mm.
- the dimensioning of the aforementioned clearances depends on the turbine engine and can be calculated on the transient operating phases of the turbine engine, taking into account the axial and radial displacements between the rotor and the stator, which can range from tenths of a millimeter to a few millimeters. It is therefore essential to ensure a minimum clearance between the stator and rotor parts in order to avoid any contact during the operation of the turbomachine.
- the first downstream spoiler may extend radially outwards from a radially outer end of an annular part of the upstream sealing piece, said first annular recirculation cavity being delimited, radially inwards, by a radially outer face of the annular part of the upstream sealing piece, the radially outer annular face of said annular part having, in whole or in part, a concave shape.
- the concave shape further promotes the formation of a vortex or whirlpool within the first recirculation cavity.
- the upstream sealing part may comprise a concave surface connecting the first and second downstream spoilers.
- Such a concave surface further promotes the formation of a vortex or whirlpool within the second recirculation cavity.
- the first downstream spoiler may extend radially outwards from a radially outer end of an annular part of the upstream sealing piece, the first downstream spoiler comprising a frustoconical wall flared downstream extending from the radially outer and downstream end of the annular part of the upstream sealing part and a radial wall extending radially outwards from a downstream end of said frustoconical wall.
- the first downstream spoiler may comprise a longitudinal wall projecting downstream from said radial wall.
- the longitudinal wall of the first downstream spoiler makes it possible to form an additional curve in the duct connecting the annular recirculation cavity and the annular purge cavity.
- the pressure drops of the gases flowing in the conduit connecting the annular recirculation cavity and the annular purge cavity are increased. This makes it possible to further limit, or even prevent, the propagation of gases coming from the annular vein towards the annular purge cavity.
- the first downstream spoiler may have a plurality of holes, preferably regularly distributed circumferentially around the longitudinal axis. This allows a flow of purge air to pass through the holes from the second recirculation cavity to the first annular recirculation cavity, in particular at the level where the pressure of the gases in the second annular recirculation cavity is the highest. This further limits the introduction of gases from the annular stream into the first annular purge cavity.
- the plurality of holes can be made through the tapered wall of said first downstream spoiler.
- the second downstream spoiler may be cylindrical, i.e. may extend longitudinally downstream.
- the angle between the tapered wall of the first downstream spoiler and the second downstream spoiler is between 30 and 45°, preferably between 35 and 40°.
- the second downstream spoiler can be arranged axially opposite a recess or a recess formed in the downstream sealing part in order to keep a minimum axial play between the second downstream spoiler and the part of downstream sealing.
- Such a recess or setback promotes the formation of a vortex or vortex in the second recirculation cavity, and prevents the introduction of hot gases into the purge cavity.
- the upstream spoiler may have a radially outer face which is of frustoconical shape with a section decreasing towards the upstream extending over at least a first longitudinal portion.
- Such a shape makes it easier to evacuate the purge air and the gases out of the first recirculation cavity towards the annular vein. Moreover, such a characteristic makes it possible to adapt the direction in which the gases mixed in the annular vein are reintroduced into the annular vein to minimize the disturbances on the gases flowing in the annular vein.
- the radially outer face of said first upstream spoiler may be entirely of frustoconical shape with a section decreasing towards the upstream.
- the upstream end of the upstream spoiler can be, in whole or in part, radially opposite the internal annular platform of the distributor.
- the distributor may further comprise a radial annular flange extending radially inwards from the internal annular platform, the upstream sealing part being attached and fixed to the radial annular flange.
- the upstream sealing part can be made in one piece with the radial annular flange of the distributor.
- downstream sealing part can be attached and fixed on an upstream face of the annular row of moving blades, in particular on an upstream face of a disc of said annular row of moving blades.
- downstream sealing piece may be integral with said annular row of moving blades or with said disk.
- the second downstream spoiler may include a radially outward projecting part at its downstream end. Such a characteristic further makes it possible to promote the formation of a vortex or vortex in the second recirculation cavity, and to direct it towards the first recirculation cavity.
- a radially internal annular face of the internal annular platform of the distributor may have, in whole or in part, a concave shape which is arranged radially opposite said upstream spoiler and/or the first recirculation cavity.
- Such a form concave of the radially internal annular face of the internal annular platform of the distributor makes it possible to promote the appearance of a vortex at the level of the interface between the gases coming from the annular stream and the purge air.
- the annular row of moving blades may include an inner annular platform, said first upstream spoiler extending from an upstream end of the inner annular platform.
- Each moving blade of an annular row of moving blades may comprise a sector of the internal annular platform, said sectors being arranged circumferentially end to end.
- Each moving vane may include a blade extending radially outward from the respective sector of the inner annular platform.
- Each moving blade may include a blade root extending radially inward from the respective sector of the inner annular platform.
- Each blade root can be received in an associated cell formed on the outer periphery of the disk.
- each moving blade is formed in one piece with the respective sector of the internal annular platform.
- a turbomachine comprising a high-pressure gas turbine of the aforementioned type.
- FIG. 1 already described above, is a partial schematic sectional view of a prior art turbomachine
- FIG. 2 is a partial schematic sectional view of a high-pressure turbine of the turbomachine of FIG. 1;
- FIG. 3 is a partial schematic view in perspective and in section of a high-pressure turbine according to one embodiment of this document;
- FIG. 4 is a partial schematic sectional view of the turbine of FIG. 3;
- FIG. 5 is a detail view of Figure 4.
- FIG. 6 is a view corresponding to FIG. 5, illustrating an alternative embodiment.
- FIG. 3 to 5 represent, according to a first embodiment, partially a high-pressure turbine of a turbomachine of axis longitudinal X.
- the high-pressure turbine comprises a plurality of stages each comprising a distributor 30 and a movable wheel 40 mounted downstream of the distributor 30.
- the nozzle 30 comprises an annular row of fixed vanes 32.
- Each fixed vane 32 is connected, radially inwardly, to an internal annular platform 34 of the nozzle 30.
- Each fixed vane 32 extends radially towards the inside. exterior from the internal annular platform 34.
- Each fixed vane 32 is connected, radially outwards, to an external platform 34′ connected to an external casing of the high-pressure turbine.
- a radially outer annular face of the inner annular platform 34 and a radially inner annular face of the outer platform 34' delimit, radially, respectively inwards and outwards, an annular vein 11 of the turbomachine 10 at the level of the distributor 30 of the high-pressure turbine.
- each fixed vane 32 extends radially inside the annular vein 11.
- the distributor 30 further comprises a radial annular flange 36 extending radially inward from the internal annular platform 34.
- the distributor 30 can be connected to an internal turbomachine casing via the radial annular flange 36.
- the rotor 40 comprises an annular row of rotor blades 42 carried by a disc 41.
- the mobile wheel 40 comprises an internal annular platform 44.
- Each mobile blade 42 of the mobile wheel 40 comprises a sector of the internal annular platform 44, the sectors being arranged circumferentially end to end around the longitudinal axis X.
- An annular face radially outer 44a of the inner annular platform 44 delimits, radially inwards, the annular vein 11 at the level of the moving wheel 40 of the turbine.
- Each moving blade 42 comprises a blade 42' extending radially outwards in the annular vein 11 from the respective sector of the internal annular platform 44.
- the impeller 40 also comprises a downstream sealing part 43 attached and fixed to an upstream radial surface of the disc 41 and of the zone comprising the platform 44.
- the downstream sealing part 43 comprises an upstream annular spoiler 47 which is annular and which extends at the level of the radially outer end of the downstream sealing part 43.
- the upstream annular spoiler 47 is arranged, here in part, radially inside the internal annular platform 34 of the distributor 30 In other words, the upstream annular spoiler 47 is disposed radially inside the internal annular platform 34 of the distributor 30 and, in part, radially opposite the internal annular platform 34 of the distributor 30.
- the end upstream of the upstream spoiler 47 is located longitudinally more upstream than the downstream end of the internal platform 34.
- the downstream sealing part 43 can be an integral part of the disc 41 and/or of the platform 44.
- the high-pressure turbine further comprises an upstream sealing piece 50, which here is annular, applied against a downstream face of the distributor 30.
- the upstream sealing piece 50 is attached here and fixed to the radial annular flange 36.
- the upstream sealing part 50 comprises an annular part 52 applied against a downstream face of the radial annular flange 36 of the distributor 30.
- the annular part 52 of the upstream sealing part 50 can be fixed, by for example by bolting, to the radial annular flange 36 of the distributor 30.
- the upstream sealing part can be an integral part of the casing of the high-pressure turbine.
- the upstream sealing piece 50 includes a first downstream spoiler 54 which is annular.
- the first downstream annular spoiler 54 is arranged, here in part, radially inside the upstream annular spoiler 47 of the downstream sealing part 43.
- the first downstream annular spoiler 54 is arranged radially inside the spoiler upstream annular 47 and, in part, radially opposite the upstream annular spoiler 47.
- the first downstream annular spoiler 54 extends radially outwards from a radially outer end of the annular part 52 of the annular part of sealing 50.
- a radially outer end 55 of the first downstream annular spoiler 54 is arranged radially opposite the upstream annular spoiler 47, thus forming a first annular recirculation cavity 60 which is delimited, longitudinally, by the distributor 30 and the first downstream spoiler 54.
- the first annular recirculation cavity 60 is here delimited, radially outwards, by a radially inner face 34a of the annular platform i 34 of the distributor 30.
- the first annular recirculation cavity 60 is delimited, radially inwards, by a radially outer annular face 52a of the annular part 52 of the annular upstream sealing piece 50.
- the first annular recirculation cavity 60 here forms a free space. In other words, the first annular recirculation cavity 60 is here devoid of any solid element.
- a free space is formed, longitudinally, between the internal annular platform 34 of the distributor 30 and the internal annular platform 44 of the impeller 40.
- the internal annular platform 34 of the distributor 30 and the upstream annular spoiler 47 of the movable wheel 40 together define a clearance or flow conduit between the annular vein 11 and the first annular recirculation cavity 60.
- Such an arrangement of the first downstream annular spoiler 54 delimiting the first annular recirculation cavity 60 allows the formation of a whirlpool, or vortex (illustrated by arrows in Figure 4), gases flowing in the annular stream 1 1 which are introduced into the first annular recirculation cavity 60, these gases mixing with a purge air flow from an annular cavity of purge 62 and a second annular recirculation cavity 64 located radially inwards between the distributor 30 and the moving wheel 40.
- a vortex makes it possible, on the one hand, to limit, or even to prevent, the gases from the vein 1 1 to flow more radially inwards, and on the other hand, to redirect these gases towards the annular vein 11 .
- the vortex impedes a flow, radially inward, of the gases coming from the annular vein 11 .
- the gases coming from the annular vein 11 being introduced into the first recirculation cavity 60 are thus advantageously contained in this cavity 60.
- the quantity of gas from the annular vein 11 which penetrates into the second recirculation cavity 64 is reduced. and in the annular purge cavity 62.
- the purge air flow rate necessary to redirect the gases that have entered the first annular recirculation cavity 60 to the annular vein 11 is reduced.
- the moving wheel elements 40 are better protected.
- the quantity of purge air taken from the high-pressure compressor and/or the low-pressure compressor is reduced, which makes it possible to improve the efficiency of the turbomachine.
- the first downstream annular spoiler 54 comprises a frustoconical wall 54a flared downstream and extending from the radially outer end and downstream of the annular part 52 of the annular sealing piece 50.
- the thickness of the frustoconical wall 54a decreases slightly downstream.
- the first downstream annular spoiler 54 also comprises a radial annular wall 54b extending radially outwards from a downstream end of the frustoconical wall 54a.
- a radial clearance is formed between the radially outer end of the first downstream spoiler 54 and the upstream spoiler 47, allowing the passage of a purge air flow coming from the second recirculation cavity 64 and from the purge cavity 62.
- the annular part 52 of the annular sealing piece 50 has a radially outer annular face 52a having a concave shape.
- the first downstream annular spoiler 54 may also have a plurality of holes (not shown) which may be regularly distributed circumferentially around the longitudinal axis X.
- the plurality of holes may extend through the frustoconical wall 54a of the first downstream annular spoiler 54. This allows a purge air flow to pass through the holes 56 towards the first annular recirculation cavity 60, in particular at the level where the pressure of the gases in the first annular recirculation cavity 60 is the higher. This further limits the introduction of gases from the vein annular 11 in the second recirculation cavity 64 and in the annular purge cavity 62.
- the first upstream annular spoiler 47 has a radially outer annular face 47a which is of frustoconical shape with a section decreasing towards the upstream and which extends over a first longitudinal portion of the first annular upstream spoiler 47.
- the first portion of the upstream annular spoiler 47 is, here in part, radially opposite the internal annular platform 34 of the distributor 30
- the radially outer annular face 47a of the first portion of the annular spoiler upstream 47 is here connected to the radially outer annular face 44a of the inner annular platform 44 of the movable wheel 40, in particular by a rounding.
- the gases of the annular stream 11 introduced into the first annular recirculation cavity 60 via the conduit or gap formed between said upstream annular spoiler 47 and the internal annular platform 34 of the distributor 30, are mixed to the purge air flow to be redirected to the annular vein 11 .
- a radially outer annular face 47a of the upstream annular spoiler 47 makes it possible to adapt the direction in which the gases mixed in the annular stream 11 are reintroduced into the annular stream 11 to minimize the disturbances on the gases flowing in the annular stream.
- the taper of the radially outer annular face 47a of the upstream annular spoiler 47 may be chosen to minimize the disturbances on the gases flowing in the annular stream 11 .
- the radially inner annular face 34a of the inner annular platform 34 of the distributor 30 has, here in part, a concave shape which is arranged radially opposite the upstream annular spoiler 47.
- a concave shape of the face annular radially internal 34a of the internal annular platform 34 of the distributor 30 makes it possible to promote the appearance of a vortex at the level of the interface between the gases originating from the annular stream 11 and the purge air.
- the upstream sealing part 50 comprises a second downstream annular spoiler 58 arranged radially inside the first downstream annular spoiler 54.
- the second downstream annular spoiler 58 extends longitudinally downstream from the part 52 of the annular sealing piece 50.
- the second downstream spoiler 58 has a cylindrical shape and forms an angle of between 30 and 45°, preferably between 35 and 40°, with the frustoconical wall 54a of the first downstream spoiler 54.
- the second downstream spoiler 58 is located axially opposite an annular recess 43a made in the downstream sealing part 43. An axial play is formed between the downstream end of the second downstream spoiler 58 and the wall bottom of the recess 43a, so as to allow the passage of a purge air flow from the purge cavity 62.
- the second recirculation cavity 64 is delimited by the first downstream spoiler 54, the second downstream spoiler 58 and the upstream surface of the second sealing part 43.
- a small quantity of gases from the first annular recirculation cavity 60 can emerge into the second recirculation cavity 64 through the clearance formed between the upstream spoiler 47 and the first downstream spoiler 54. These gases are then mixed with the purge air flow from the purge cavity 62, entering the second recirculation cavity 64 through the clearance formed between the second downstream spoiler 58 and the downstream sealing piece 43. Once mixed with the air, these gases are redirected to the first recirculation cavity 60 then to the annular vein 11 .
- the shape of the second cavity 64 makes it possible to generate vortices or vortices, illustrated by arrows in FIG. 4, making it possible to facilitate such mixing and such evacuation. This limits, or even prevents, a flow of gases towards the purge cavity 62.
- Figure 6 illustrates an alternative embodiment in which a part of the second downstream spoiler 58, for example the downstream end of the second downstream spoiler, comprises a projecting part 58a radially outwards, for example a radially oblique part outwards and longitudinally downstream.
- a projecting part 58a makes it possible to further improve the evacuation efficiency of the vortex created at the level of the second recirculation cavity 64.
- the annular sealing piece 50 may be made in one piece with the radial annular flange 36 of the distributor 30.
- the annular sealing part 50 may comprise a plurality of sectors arranged circumferentially end to end around the longitudinal axis X.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2110133A FR3127520B1 (fr) | 2021-09-27 | 2021-09-27 | Turbine a gaz haute-pression pour turbomachine |
| PCT/FR2022/051663 WO2023047034A1 (fr) | 2021-09-27 | 2022-09-02 | Turbine à gaz haute-pression pour une turbomachine et turbomachine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4409114A1 true EP4409114A1 (fr) | 2024-08-07 |
| EP4409114B1 EP4409114B1 (fr) | 2025-06-11 |
Family
ID=80122503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22786385.9A Active EP4409114B1 (fr) | 2021-09-27 | 2022-09-02 | Turbine à gaz haute-pression pour une turbomachine et turbomachine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12345161B2 (fr) |
| EP (1) | EP4409114B1 (fr) |
| CN (1) | CN117980585A (fr) |
| FR (1) | FR3127520B1 (fr) |
| WO (1) | WO2023047034A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3127519B1 (fr) * | 2021-09-27 | 2023-09-22 | Safran Aircraft Engines | Turbine a gaz haute-pression pour turbomachine |
| CN118979794A (zh) * | 2024-08-14 | 2024-11-19 | 中国航发湖南动力机械研究所 | 一种轮缘封严结构、涡轮结构及航空发动机 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060275107A1 (en) * | 2005-06-07 | 2006-12-07 | Ioannis Alvanos | Combined blade attachment and disk lug fluid seal |
| US8696320B2 (en) * | 2009-03-12 | 2014-04-15 | General Electric Company | Gas turbine having seal assembly with coverplate and seal |
| FR2982635B1 (fr) * | 2011-11-15 | 2013-11-15 | Snecma | Roue a aubes pour une turbomachine |
| EP2759675A1 (fr) * | 2013-01-28 | 2014-07-30 | Siemens Aktiengesellschaft | Agencement de turbine présentant un meilleur effet d'étanchéité au niveau d'un joint étanche |
| US9605552B2 (en) * | 2013-06-10 | 2017-03-28 | General Electric Company | Non-integral segmented angel-wing seal |
| US11459903B1 (en) * | 2021-06-10 | 2022-10-04 | Solar Turbines Incorporated | Redirecting stator flow discourager |
-
2021
- 2021-09-27 FR FR2110133A patent/FR3127520B1/fr active Active
-
2022
- 2022-09-02 CN CN202280062230.3A patent/CN117980585A/zh active Pending
- 2022-09-02 US US18/694,563 patent/US12345161B2/en active Active
- 2022-09-02 EP EP22786385.9A patent/EP4409114B1/fr active Active
- 2022-09-02 WO PCT/FR2022/051663 patent/WO2023047034A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3127520B1 (fr) | 2023-08-18 |
| CN117980585A (zh) | 2024-05-03 |
| US20240392692A1 (en) | 2024-11-28 |
| FR3127520A1 (fr) | 2023-03-31 |
| EP4409114B1 (fr) | 2025-06-11 |
| US12345161B2 (en) | 2025-07-01 |
| WO2023047034A1 (fr) | 2023-03-30 |
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