EP3596315A1 - Ensemble d'anneau de turbine - Google Patents
Ensemble d'anneau de turbineInfo
- Publication number
- EP3596315A1 EP3596315A1 EP18714568.5A EP18714568A EP3596315A1 EP 3596315 A1 EP3596315 A1 EP 3596315A1 EP 18714568 A EP18714568 A EP 18714568A EP 3596315 A1 EP3596315 A1 EP 3596315A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ring
- radial
- turbine
- annular
- sector
- 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
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- 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
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
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- 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
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- 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
- F05D2220/323—Application in turbines in gas turbines for aircraft propulsion, e.g. jet 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
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/11—Shroud seal segments
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- 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
- F05D2300/00—Materials; Properties thereof
- F05D2300/20—Oxide or non-oxide ceramics
-
- 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
- F05D2300/00—Materials; Properties thereof
- F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
- F05D2300/603—Composites; e.g. fibre-reinforced
- F05D2300/6033—Ceramic matrix composites [CMC]
Definitions
- the invention relates to a turbine ring assembly comprising a plurality of ceramic matrix composite ring sectors and a ring support structure.
- the field of application of the invention is in particular that of aeronautical gas turbine engines.
- the invention is however applicable to other turbomachines, for example industrial turbines.
- CMC materials have good mechanical properties making them suitable for constituting structural elements and advantageously retain these properties at high temperatures.
- the use of CMC materials has advantageously made it possible to reduce the cooling flow to be imposed during operation and thus to increase the performance of the turbomachines.
- the use of CMC materials advantageously makes it possible to reduce the weight of the turbomachines and to reduce the effect of hot expansion encountered with the metal parts.
- the existing solutions proposed can implement an assembly of a CMC ring sector with metal hooking portions of a ring support structure, these hooking portions being subjected to the hot flow. As a result, these metal hooking parts undergo hot expansion, which can lead to mechanical stressing of the ring sectors in CMC and embrittlement thereof.
- the invention aims to provide a turbine ring assembly for maintaining each ring sector in a deterministic manner, that is to say so as to control its position and prevent it from vibrating. on the one hand, while allowing the ring sector, and by extension the ring, to deform under the effects of temperature rise and pressure variations, and in particular independently of the metal parts interfaced, and on the other hand, while improving the seal between the off-vein sector and the vein sector and simplifying the manipulations and reducing their number for mounting the ring assembly.
- An object of the invention provides a turbine ring assembly comprising a plurality of ring sectors forming a turbine ring and a ring support structure, each ring sector having, according to a sectional plane defined by an axial direction and a radial direction of the turbine ring, an annular base portion with, in the radial direction of the turbine ring, an inner face defining the inner face of the turbine ring and an outer face to from which protrude a first and a second attachment lugs, the ring support structure having a central ferrule from which project a first and a second radial flange between which are maintained the first and second latches of each ring sector.
- the turbine ring assembly comprises an annular flange in one piece removably attached to the central ferrule, the annular flange having a first free end, a second end coupled to the central ferrule, a first portion extending from the first end, a second portion extending between the first portion and the first portion; second end, the first portion of the flange having a first and a second separate legs, the first tab being in abutment against the first latching lug and the second tab being spaced from the first tab in the axial direction, the second tab being in upstream of the first leg relative to the direction of an air flow to pass through the turbine ring assembly, and the second portion of the annular flange comprising a bearing ferrule extending projecting downstream in the axial direction, the supporting ferrule having radial support in contact with the central ferrule of the ring support structure.
- the ring sectors may be made of ceramic matrix composite material (CMC).
- CMC ceramic matrix composite material
- the presence on the first portion of the annular flange of a second tab disposed upstream and separated from a first tab in contact with an attachment tab upstream of the ring provides the turbine ring assembly an upstream leg of the annular flange dedicated to the recovery of the force of the high pressure distributor (DHP).
- the second tab upstream of the first tab of the turbine ring and free from any contact with the ring is configured to pass the maximum axial force induced by the DHP directly into the ring support structure without passing by the ring which, when it is in CMC, has a low mechanical permissible.
- the downstream support ferrule provides a higher resistance to DHP-induced tilting.
- the bearing shell takes up the significant tangential stresses caused by the DHP force on the upstream leg and thus limits the tilting of the annular flange.
- the radial support of the support ring makes it possible to limit the tilting of the annular flange when the DHP force passes through the flange.
- annular flange makes it possible to have axial access to the cavity of the turbine ring. This makes it possible to assemble the ring sectors together outside the ring support structure and then to axially slide the assembly thus assembled into the cavity of the ring support structure until it comes into contact. bearing against the second radial flange, before fixing the annular flange on the central shell of the ring support structure.
- annular flange in one piece, that is to say describing the entirety of a ring 360 °, allows, compared to a segmented annular flange, to limit the passage of the air flow between the off-vein sector and the vein sector, since all inter-sector leaks are eliminated, and thus to control the tightness.
- the solution defined above for the ring assembly thus makes it possible to maintain each ring sector in a deterministic manner, that is to say to control its position and to prevent it from starting to vibrate. by improving the seal between the off-vein sector and the vein sector, by simplifying the manipulations and reducing their number for the assembly of the ring assembly, and by allowing the ring to deform under the effect of temperature and pressure especially independently metal parts interface.
- the first annular radial flange forms a first projecting rib in the radial direction of the turbine ring towards the inside of the ring
- the second end of the annular flange comprises an axial abutment extending in the radial direction of the turbine ring towards the outside of the ring, the axial abutment being disposed upstream of said first annular radial flange and bearing in the axial direction of the turbine ring against said first annular radial flange.
- the axial abutment makes it possible to press the annular flange on the first annular radial flange and thus to position the first flange of the annular flange axially with respect to the upstream radial fastening tab of the ring.
- the central ferrule of the ring support structure may further comprise a second rib projecting in the radial direction of the turbine ring towards the interior of the turbine ring assembly.
- ring and having a bearing surface on which the radial support of the bearing ferrule is supported, the second rib being disposed between the first and second radial flanges of the ring support structure.
- the second rib is a radial fulcrum that allows the ring support structure to retain the flip-flop of the second leg of the annular flange when the DHP force is applied.
- the large distance between the axial abutment and the radial support of the support ring makes it possible to increase the arm lever and thus to induce a smaller radial force on the casing at the contact of the radial support with the second rib of the ring support structure.
- the annular flange is fixed by means of two radial frettings, a first hooping between the radial support and the second rib, and a second hooping between the surface of the axial stop extending in a plane comprising the axial direction and the central ferrule.
- the ring sector may have a Greek letter section pi ( ⁇ ) inverted according to the section plane defined by the axial direction and the radial direction, and the whole may comprise, for each ring sector, at least three pins for radially holding the ring sector in position, the first and second attachment tabs of each ring sector each comprising a first end integral with the outer face of the ring sector; the annular base, a second free end, at least three receiving lugs of said at least three pegs, at least two lugs projecting from the second end of one of the first or second latching lugs in the radial direction of the turbine ring and at least one lug; projecting from the second end of the other hooking lug in the radial direction of the turbine ring, each receiving lug having a receiving orifice of one of the pins.
- the ring sector may have a section having an elongated K-shape according to the section plane defined by the axial direction and the radial direction, the first and a second legs with a shape of S.
- the ring sector may have, on at least one radial range of the ring sector, a section at 0 according to the sectional plane defined by the axial direction and the radial direction, the first and the second attachment lugs each having a first end secured to the outer face and a second free end, and each ring sector comprising a third and a fourth attachment lugs each extending in the axial direction of the turbine ring, between a second end of the first latching lug and a second end of the second latching lug, each ring sector being fixed to the ring support structure by a fixing screw comprising a screw head bearing against the ring support structure and a thread cooperating with a thread formed in a fixing plate, the fixing plate cooperating with the three the fourth and fourth fastening tabs.
- Another object of the invention provides a turbomachine comprising a turbine ring assembly as defined above.
- FIG. 1 is a schematic perspective view of a first embodiment of a turbine ring assembly according to the invention
- FIG. 2 is a diagrammatic exploded perspective view of the turbine ring assembly of FIG. 1;
- FIG. 3 is a schematic sectional view of the turbine ring assembly of FIG. 1;
- FIG. 4 is a diagrammatic sectional view of a second embodiment of the turbine ring assembly
- FIG. 5 is a diagrammatic sectional view of a third embodiment of the turbine ring assembly
- FIG. 6 is a schematic sectional view of a fourth embodiment of the turbine ring assembly. Detailed description of embodiments
- FIG. 1 shows a high pressure turbine ring assembly comprising a turbine ring 1 made of ceramic matrix composite material (CMC) and a metal ring support structure 3.
- the turbine ring 1 surrounds a set of blades rotary (not shown).
- the turbine ring 1 is formed of a plurality of ring sectors 10, FIG. 1 being a view in radial section.
- the arrow D A indicates the axial direction of the turbine ring 1 while the arrow D R indicates the radial direction of the turbine ring 1.
- Figure 1 is a partial view of the turbine ring 1.
- turbine ring 1 which is actually a complete ring.
- each ring sector 10 has, in a plane defined by the axial directions D A and radial D R , a substantially shaped section of the Greek letter inverted ⁇ .
- the section comprises in fact an annular base 12 and upstream and downstream radial attachment tabs, respectively 14 and 16.
- upstream and downstream are used here with reference to the flow direction of the gas flow in the turbine represented by the arrow F in FIG. 1.
- the tabs of the ring sector 10 may have another shape, the section of the ring sector having a shape other than ⁇ , such as a K-shape or 0.
- the annular base 12 comprises, in the radial direction D R of the ring 1, an inner face 12a and an outer face 12b opposite to each other.
- the inner face 12a of the annular base 12 is coated with a layer 13 of abradable material forming a thermal and environmental barrier and defines a stream of flow of gas in the turbine.
- the terms "internal” and “external” are used herein with reference to the radial direction D R in the turbine.
- the upstream and downstream radial hooking tabs 14 and 16 project in the direction DR from the outer face 12b of the annular base 12 away from the upstream and downstream ends 121 and 122 of the annular base 12.
- the upstream and downstream radial attachment tabs 14 and 16 extend over the entire width of the ring sector 10, that is to say over the entire arc described by the ring sector 10, or over the entire circumferential length of the ring sector 10.
- the ring support structure 3 which is integral with a turbine casing comprises a central ring 31, extending in the axial direction D A , and having an axis of revolution. coincide with the axis of revolution of the turbine ring 1 when they are fixed together, and a first annular radial flange 32 and a second annular radial flange 36, the first annular radial flange 32 being positioned upstream of the second radial annular flange 36 which is therefore downstream of the first annular radial flange 32.
- the second annular radial flange 36 extends in the circumferential direction of the ring 1 and, in the radial direction D R , from the central shell 31 towards the center of the ring 1. It comprises a first end 361 free and a second end 362 integral with the central ferrule 31.
- the second annular radial flange 36 comprises a first portion 363, a second portion 364, and a third portion 365 between the first portion 363 and the second portion 364.
- the first portion 363 is s extends between the first end 361 and the third portion 365, and the second portion 364 extends between the third portion 365 and the second end 362.
- the first portion 363 of the second radial annular flange 36 is in contact with the downstream radial gripping flange 16.
- the second portion 364 is thinned relative to the first portion 363 and the third portion 365 so as to give some flexibility to the second annular radial flange 36 and so do not over-stress the turbine ring 1
- the first annular radial flange 32 forms a first annular radial rib extending in the circumferential direction of the ring 1 as well as in the radial direction D R of the ring from the central ferrule 31 towards the center of the ring 1.
- the turbine ring assembly 1 comprises a single removable annular flange 35 made in one piece and removably attached to the ring support structure 3.
- the removable flange 35 comprises a first free end 351 and a second end 352 radially shrunk to the central shell 31 of the annular support structure 3.
- the removable flange 35 further comprises a first portion 353 extending from the first end 351 and a second portion 354 s extending between the first portion 353 and the second end 352.
- the first portion 353 comprises a first tab 33 and a second tab 34 distinct from the first tab 33 and remote from the latter in the axial direction D A , the second tab 34 being upstream of the first tab 33 with respect to the flow direction. of air F intended to pass through the turbine ring assembly 1.
- the first lug 33 of the removable flange 35 is in abutment against the upstream radial attachment tab 14 of each ring sectors 10 composing the turbine ring 1.
- the radial retention of the ring 1 is ensured by the first tab 33 of the annular flange 35 which is pressed against the upstream radial fastening flap 14 and by the first portion 363 of the second annular radial flange 36 which is pressed against the flange.
- the first lug 33 of the annular flange 35 seals between the vein cavity and the off-vein cavity of the ring.
- the second leg 34 of the removable annular flange 35 is dedicated to the recovery of the force of the high pressure distributor (DHP) on the removable annular flange 35, on the one hand, by deforming, and, on the other hand, by transit this effort towards the line crankcase which is more robust mechanically, that is to say towards the line of the ring support structure 3 as illustrated by the effort E arrows shown in Figure 3.
- DHP high pressure distributor
- the first tab 33 and the second tab 34 of the removable annular flange 35 meet at the second portion 354 of the removable annular flange 35.
- the annular flange 35 comprises an axial abutment 355 extending in the radial direction D R from the second end 352 of the annular flange 35.
- the axial abutment 355 extends from the second end 352 towards the central shell 31 of the ring support structure 3.
- the axial stop 355 is fixed by hooping on the central shell 31.
- the axial abutment 355 is disposed upstream of the first radial rib formed by the first annular radial flange 32, the latter being thus downstream of the axial abutment 355.
- the axial abutment 355 has an upstream face 355a receiving the gas flow F and a downstream face 355b opposite the upstream face 355a and facing the first radial rib 312.
- the first radial rib 32 that is to say the first annular radial flange, has an upstream face 32a facing the axial abutment 355 of the annular flange 35 and a downstream face 32b opposite the upstream face 32a and facing the second annular radial flange 36.
- Axial stop 355 has two uses. It makes it possible, on the one hand, to place the annular flange 35 in axial position, which makes it possible to precisely adjust the axial position of the first lug 33 with respect to the upstream radial clawing lug 14 of the ring, to ensure contact axial controlled between the two parts.
- the axial abutment 355 makes it possible, on the other hand, to limit the tilting of the second tab 34 and to transmit the DHP effort axially on the central shell 31 of the ring support structure 3.
- the second end 352 of the annular flange 35 comprises a support ring 356 projecting downstream in the axial direction D A.
- the annular flange 35 has an upstream face 35a receiving the gas flow F and a downstream face 35b opposite the upstream face 35a and facing the first annular radial flange 32 and the upstream radial clawing tab 14.
- the second portion 354 of the annular flange 35 comprises a support ring 356 extending in the axial direction D A from the downstream face 35b of the annular flange 35.
- the support ring 356 has an inner face 356a and an outer face 356b opposite to the inner face 356a, a first free end 3561, and a second end 3562 integral with the downstream face 35b of the annular flange 35, the first end 3561 being downstream of the second end 3562 when the turbine ring assembly is mounted.
- the support ring 356 comprises, at its first end 3561, a radial support 358 projecting from the outer face 356b of the support ring 356.
- the central ferrule 31 of the ring support structure 3 further comprises a second radial rib 314 disposed between the first annular radial flange 32 and the second annular radial flange 36 and projecting in the radial direction D R from the central shell 31.
- the second radial rib 314 extends towards the ring 1, that is to say in the direction of the radial support 358 of the bearing flange 356.
- the second radial rib 314 has at its free end an inner radial face 314a facing the radial support 358.
- the radial support 358 has, on its free end, an outer radial face 358b opposite the second radial rib 314 of the central shell 31 of the ring support structure 3.
- the support ring 356 provides a higher resistance to DHP stress-induced tilting.
- the support ring 356 takes up the important tangential stresses caused by the DHP force and thus limits the tilting of the annular flange 36.
- Figure 4 is shown a sectional view of a second embodiment of the turbine ring assembly.
- the second embodiment illustrated in FIG. 4 differs from the first embodiment illustrated in FIGS. 1 to 3 in that the ring sector 10 has, in the plane defined by the axial directions D A and radial D R , a K-shaped section instead of an inverted ⁇ -shaped section.
- FIGS. 5 and 6 are respectively a diagrammatic sectional view of a third embodiment of the turbine ring assembly and a schematic sectional view of a fourth embodiment of the ring assembly. of turbine.
- the third and fourth embodiments illustrated in FIGS. 5 and 6 differ from the first embodiment illustrated in FIGS. 1 to 3 in that the ring sector 10 has in the plane defined by the axial directions D A and radial D R , on a portion of the ring sector 10, a 0-shaped section instead of an inverted ⁇ -shaped section, the ring section 10 being fixed to the ring support structure 3 to the using a screw 19 and a fastener 20, the screws 38 being removed.
- the second annular radial flange 36 of the ring support structure 3 is separated from the first leg 33 of the annular flange. 35 a distance corresponding to the spacing of the upstream and downstream radial hooking tabs 14 and 16 so as to maintain the latter between the first tab 33 of the annular flange 35 and the second annular radial flange 36.
- the ring assembly comprises two first pins 119 cooperating with the hooking tab upstream 14 and the first tab 33 of the annular flange 35, and two second pins 120 cooperating with the downstream fastening tab 16 and the second annular radial flange 36.
- the second portion 354 of the annular flange 35 comprises two orifices 3540 for receiving the first two pins 119
- the third portion 365 of the annular radial flange 36 comprises two orifices. 3650 configured to receive the second two pins 120.
- each of the upstream and downstream radial attachment tabs 14 and 16 comprises a first end, 141 and 161, integral with the outer face 12b of the annular base 12 and a second end, 142 and 162, free.
- the second end 142 of the upstream radial fastening tab 14 comprises two first lugs 17 each having an orifice 170 configured to receive a first pin 119.
- the second end 162 of the downstream radial fastening tab 16 comprises two second ears 18 each having an orifice 180 configured to receive a second pin 120.
- the first and second ears 17 and 18 project in the radial direction D R of the turbine ring 1 respectively of the second end 142 of the radial attachment tab 14 upstream and the second end 162 of the downstream radial attachment tab 16.
- the orifices 170 and 180 may be circular or oblong. Preferably, all the orifices 170 and 180 comprise a portion of circular orifices and a portion of oblong orifices.
- the circular orifices make it possible to tangentially index the rings and to prevent them from moving tangentially (especially in case of touch by the blade).
- the oblong holes accommodate differential expansions between the CMC and the metal. CMC has a coefficient of expansion much lower than that of metal. Hot, the lengths in the tangential direction of the ring sector and the housing portion vis-à-vis vis-à-vis will be different.
- a first drilling pattern for a case with three ears, would comprise a radial circular orifice on a radial attachment flange and two tangential oblong holes on the other radial attachment flange and a second drilling pattern, for a case with at least four lugs, would comprise a circular orifice and an oblong orifice by radial fastening flange vis-à-vis each time.
- Other related cases may be considered as well.
- the first two lugs 17 are positioned at two different angular positions relative to the axis of revolution of the turbine ring 1.
- the two seconds ears 18 are positioned at two different angular positions with respect to the axis of revolution of the turbine ring 1.
- each ring sector 10 has, in a plane defined by the axial directions D A and radial D R / a substantially K-shaped section comprising an annular base 12 with , in the radial direction DR of the ring, an inner face 12a coated with a layer 13 of abradable material forming a thermal and environmental barrier and which defines the flow of gaseous flow stream in the turbine.
- S-shaped upstream and downstream hooking tabs 140, 160 that are substantially S-shaped extend, in the radial direction DR, from the outer face 12b of the annular base 12 over the entire width thereof and above the upstream and downstream circumferential end portions 121 and 122 of the annular base 12.
- the radial latching tabs 140 and 160 have a first end, respectively referenced 1410 and 1610, integral with the annular base 12 and a second free end, referenced respectively 1420 and 1620.
- the free ends 1420 and 1620 of the radial fastening tabs upstream and downstream 140 and 160 extend either parallel to the plane in which the annular base 12 extends, that is to say in a circular plane, or rectilinearly while the latching lugs 140 and 160 s 'extend annularly.
- the surface supports then become linear supports, which provides a greater sealing than in the case of punctual supports.
- the second end 1620 of the downstream radial gripping tab 160 is held between a portion 3610 of the second annular radial flange 36 projecting in the axial direction D A from the first end 361 of the second annular radial flange 36 in the opposite direction to the flow direction F and the free end of the screw 38 associated, that is to say the screw opposite to the screw head.
- the second end 1410 of the upstream radial gripping tab 140 is held between a portion 3310 of the first tab 33 of the annular flange 35 projecting in the axial direction D A from the first end 331 of the first tab 33 in the direction flow F and the free end of the screw 38 associated.
- the ring sector 10 comprises an axial hooking tab 17 'extending between the upstream and downstream radial attachment tabs 14 and 16.
- the axial hooking tab 17 ' extends more precisely, in the axial direction D A / between the second end 142 of the upstream radial fastening tab 14 and the second end 162 of the downstream radial fastening tab 16.
- the axial hooking tab 17 ' comprises an upstream end 171' and a downstream end 172 'separated by a central portion 170'.
- the upstream and downstream ends 17 and 172 'of the axial latching lug 17' protrude, in the radial direction DR, from the second end 142, 162 of the radial latching lug 14, 16 to which they are coupled, so as to have a central portion 170 'of axial attachment tab 17' raised relative to the second ends 142 and 162 of the upstream and downstream radial hooking tabs 14 and 16.
- the turbine ring assembly comprises a screw 19 and a fastener 20.
- the fastener 20 is fixed on the axial fastening tab 17 '.
- the fastener 20 further comprises an orifice 21 having a tapping cooperating with a thread of the screw 19 to attach the fastener 20 to the screw 19.
- the screw 19 comprises a screw head 190 whose diameter is greater the diameter of an orifice 39 made in the central shell 31 of the support structure of the ring 3 through which the screw 19 is inserted before being screwed to the fastener 20.
- the support ring 356 further comprises an orifice 3560 traversed by the screw 19 and a part of the fastener 20.
- the orifice 3560 has a diameter greater than that of the fastener 20.
- the radial joining of the ring sector 10 with the ring support structure 3 is carried out using the screw 19, the head 190 of which bears against the central ring 31 of the support structure of the ring. 3, and the fastener 20 screwed to the screw 19 and attached to the axial fastening tab 17 'of the ring sector 10, the screw head 190 and the fastener 20 exerting forces in opposite directions to hold together the ring 1 and the ring support structure 3 .
- Figure 6 is a schematic sectional view of a fourth embodiment of the turbine ring assembly.
- the fourth embodiment illustrated in FIG. 6 is a variant of the third embodiment illustrated in FIG. 5.
- the central ferrule 31 of each ring sector 10 does not comprise an orifice 39.
- the ring sector 10 is fixed directly to the support ring 356 with the aid of the screw 19 and the attachment piece 20.
- the support ring 356 comprises a through hole 3560 by the screw 19.
- the orifice 3560 has a diameter smaller than that of the screw head 190.
- the radial securing of the ring sector 10 with the ring support structure 3 is carried out using the screw 19, the head 190 of which bears against the support ring 356 of the annular flange 35, and the fastener 20 screwed to the screw 19 and fixed to the axial fastening tab 17 'of the ring sector 10, the screw head 190 and the fastener 20 exerting forces in opposite directions to hold together the ring 1 and the ring support structure 3.
- each ring sector 10 further comprises rectilinear support surfaces 110 mounted on the faces of the upstream and downstream radial attachment tabs 14 and 16. in contact respectively with the first leg 33 of the annular flange 35 and the second annular radial flange 36, that is to say on the upstream face 14a of the upstream radial claw 14 and on the downstream face 16b of the leg
- the rectilinear supports could be mounted on the first tab 33 of the annular flange 35 and on the second downstream annular radial flange 36.
- the rectilinear supports 110 allow to have controlled sealing zones. Indeed, the bearing surfaces 110 between the upstream radial fastening tab 14 and the first tab 33 of the annular flange 35, on the one hand, and between the downstream radial fastening tab 16 and the second annular radial flange 36 are included in the same rectilinear plane.
- Each ring sector 10 described above is made of ceramic matrix composite material (CMC) by forming a fibrous preform having a shape close to that of the ring sector and densification of the ring sector by a ceramic matrix .
- CMC ceramic matrix composite material
- ceramic fiber yarns for example SiC fiber yarns, such as those marketed by the Japanese company Nippon Carbon under the name "Hi-NicalonS", or carbon fiber yarns. .
- the fibrous preform is advantageously made by three-dimensional weaving, or multilayer weaving with the provision of debonding zones enabling the parts of preforms corresponding to the hooking tabs 14 and 16 of the sectors 10 to be spaced apart.
- the weave can be interlock type, as illustrated.
- Other weaves of three-dimensional weave or multilayer can be used as for example multi-web or multi-satin weaves.
- the blank After weaving, the blank can be shaped to obtain a ring sector preform which is consolidated and densified by a ceramic matrix, the densification can be achieved in particular by chemical vapor infiltration (CVI) which is well known in itself.
- CVI chemical vapor infiltration
- the textile preform can be a little hardened by CVI so that it is rigid enough to be manipulated, before raising liquid silicon by capillarity in the textile for densification ("Melt Infiltration").
- the ring support structure 3 is made of a metallic material such as a Waspaloy® alloy or inconel 718® or C263®.
- the ring sectors 10 are assembled together on an annular tool of the "spider" type comprising, for example, suckers configured to each maintain a ring sector 10.
- the ring 1 is then mounted on the ring support structure 3 by inserting each second pin 120 into each of the orifices 180 of the second lugs 18 of the downstream radial fastening flanges 16 of each ring sector 10 forming the ring. 1.
- All the first pins 119 are then placed in the orifices 170 provided in the first lugs 17 of the radial attachment tab 14 of the ring 1.
- annular flange 35 is fastened to the ring support structure 3 and to the ring 1.
- the annular flange 35 is mounted cold on the ring support structure 3 in contact with the stop 32. the temperature rise of the annular flange 35, the hooping takes place at the two radial contacts.
- the annular flange 35 is fixed to the ring by inserting each first pin 119 into each of the orifices 170 of the first lugs 17 of the upstream radial fastening tabs 14 of each ring sector 10 component ring 1.
- the ring 1 is thus held in position axially with the aid of the first tab 33 of the annular flange 35 and the second annular radial flange 36 respectively bearing upstream and downstream on the rectilinear support surfaces 110 of the radial tabs. respectively during the installation of the upstream end 14 and downstream 16.
- an axial prestressing may be applied to the first lug 33 of the annular flange 35 and to the upstream radial clawing lug 14 for to overcome the differential expansion effect between the CMC material of the ring 1 and the metal of the ring support structure 3.
- the first tab 33 of the annular flange 35 is held in axial stress by mechanical elements placed upstream as this is illustrated in dashed lines in FIG.
- the ring 1 is held in position radially with the aid of the first and second pins 119 and 120 cooperating with the first and second lugs 17 and 18 and the orifices 3540 and 3650 of the annular flange 35 and the annular radial flange 36.
- the invention thus provides a turbine ring assembly for maintaining each ring sector in a deterministic manner while allowing, on the one hand, the ring sector, and by extension to the ring, to deform under the effects of temperature rises and pressure variations, and in particular independently of the metal parts interface, and, on the other hand, while improving the seal between the non-vein sector and the vein sector and simplifying manipulations and reducing their number for mounting the ring assembly.
- the invention provides a turbine ring assembly comprising an upstream annular flange dedicated to the recovery of the DHP force and thus to induce low levels of forces in the CMC ring, a contact abutment between the annular flange dedicated to the recovery of DHP effort and the annular flange used to maintain the ring, the stop to ensure the non-contact of the lower parts of the two flanges when tilting the upstream flange.
- the turbine ring assembly according to the invention also makes it possible to control the rigidity at the upstream and downstream axial contacts between the CMC ring and the metal casing. As a result, the seal is ensured in all circumstances, without inducing excessive axial forces on the ring.
Landscapes
- 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 |
|---|---|---|---|
| FR1752151A FR3064024B1 (fr) | 2017-03-16 | 2017-03-16 | Ensemble d'anneau de turbine |
| PCT/FR2018/050589 WO2018172655A1 (fr) | 2017-03-16 | 2018-03-13 | Ensemble d'anneau de turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3596315A1 true EP3596315A1 (fr) | 2020-01-22 |
| EP3596315B1 EP3596315B1 (fr) | 2021-07-28 |
Family
ID=59579676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18714568.5A Active EP3596315B1 (fr) | 2017-03-16 | 2018-03-13 | Ensemble d'anneau de turbine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11028720B2 (fr) |
| EP (1) | EP3596315B1 (fr) |
| CN (1) | CN110573695B (fr) |
| FR (1) | FR3064024B1 (fr) |
| WO (1) | WO2018172655A1 (fr) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10697314B2 (en) | 2016-10-14 | 2020-06-30 | Rolls-Royce Corporation | Turbine shroud with I-beam construction |
| US10557365B2 (en) | 2017-10-05 | 2020-02-11 | Rolls-Royce Corporation | Ceramic matrix composite blade track with mounting system having reaction load distribution features |
| FR3076578B1 (fr) * | 2018-01-09 | 2020-01-31 | Safran Aircraft Engines | Ensemble d'anneau de turbine |
| FR3086327B1 (fr) | 2018-09-25 | 2020-12-04 | Safran Aircraft Engines | Ensemble pour une turbine de turbomachine |
| FR3090732B1 (fr) * | 2018-12-19 | 2021-01-08 | Safran Aircraft Engines | Ensemble d’anneau de turbine avec flasques indexés. |
| FR3091550B1 (fr) * | 2019-01-08 | 2021-01-22 | Safran Aircraft Engines | Procédé de montage et de démontage d’un ensemble d’anneau de turbine |
| CN109751088A (zh) * | 2019-03-25 | 2019-05-14 | 中国船舶重工集团公司第七0三研究所 | 一种用于船用燃气轮机的分块式涡轮外环连接结构 |
| US11149563B2 (en) | 2019-10-04 | 2021-10-19 | Rolls-Royce Corporation | Ceramic matrix composite blade track with mounting system having axial reaction load distribution features |
| FR3108671B1 (fr) * | 2020-03-24 | 2022-06-10 | Safran Aircraft Engines | Ensemble d'anneau et de distributeur de turbine de turbomachine |
| FR3108672B1 (fr) * | 2020-03-24 | 2023-06-02 | Safran Aircraft Engines | Ensemble d'anneau de turbine |
| US11208911B2 (en) | 2020-04-23 | 2021-12-28 | Rolls-Royce Plc | Turbine shroud ring segments with ceramic matrix composite components |
| US11326476B1 (en) * | 2020-10-22 | 2022-05-10 | Honeywell International Inc. | Compliant retention system for gas turbine engine |
| CN115013532A (zh) * | 2022-08-09 | 2022-09-06 | 杭州海康威视数字技术股份有限公司 | 密封结构及摄像机 |
| US11773751B1 (en) | 2022-11-29 | 2023-10-03 | Rolls-Royce Corporation | Ceramic matrix composite blade track segment with pin-locating threaded insert |
| US12031443B2 (en) | 2022-11-29 | 2024-07-09 | Rolls-Royce Corporation | Ceramic matrix composite blade track segment with attachment flange cooling chambers |
| US11713694B1 (en) | 2022-11-30 | 2023-08-01 | Rolls-Royce Corporation | Ceramic matrix composite blade track segment with two-piece carrier |
| US11840936B1 (en) | 2022-11-30 | 2023-12-12 | Rolls-Royce Corporation | Ceramic matrix composite blade track segment with pin-locating shim kit |
| US11732604B1 (en) | 2022-12-01 | 2023-08-22 | Rolls-Royce Corporation | Ceramic matrix composite blade track segment with integrated cooling passages |
| US11885225B1 (en) | 2023-01-25 | 2024-01-30 | Rolls-Royce Corporation | Turbine blade track with ceramic matrix composite segments having attachment flange draft angles |
| US12188365B1 (en) | 2023-12-04 | 2025-01-07 | Rolls-Royce Corporation | Method and apparatus for ceramic matrix composite turbine shroud assembly |
| US12158072B1 (en) | 2023-12-04 | 2024-12-03 | Rolls-Royce Corporation | Turbine shroud segments with damping strip seals |
| US12286885B1 (en) | 2023-12-04 | 2025-04-29 | Rolls-Royce Corporation | Turbine assembly with confronting vane and turbine shroud segment |
| US12152499B1 (en) | 2023-12-04 | 2024-11-26 | Rolls-Royce Corporation | Turbine shroud segments with strip seal assemblies having dampened ends |
| US12241376B1 (en) | 2023-12-04 | 2025-03-04 | Rolls-Royce Corporation | Locating plate for use with turbine shroud assemblies |
| US12421862B2 (en) | 2023-12-04 | 2025-09-23 | Rolls-Royce Corporation | Turbine shroud assembly with angled cooling holes |
| US12286906B1 (en) | 2023-12-04 | 2025-04-29 | Rolls-Royce Corporation | Locating plate for use with turbine shroud assemblies |
| US12421870B1 (en) | 2024-04-30 | 2025-09-23 | Rolls-Royce Corporation | Pin mounted ceramic matrix composite heat shields with impingement cooling |
| US12416241B1 (en) | 2024-05-30 | 2025-09-16 | Rolls-Royce Corporation | Turbine shroud assemblies with strip seals |
| US12258880B1 (en) | 2024-05-30 | 2025-03-25 | Rolls-Royce Corporation | Turbine shroud assemblies with inter-segment strip seal |
| US12215593B1 (en) | 2024-05-30 | 2025-02-04 | Rolls-Royce Corporation | Turbine shroud assembly with inter-segment damping |
| US12305525B1 (en) | 2024-05-30 | 2025-05-20 | Rolls-Royce Corporation | Turbine shroud assemblies with rod seal and strip seals |
| US12410725B1 (en) | 2024-05-31 | 2025-09-09 | Rolls-Royce Corporation | Turbine shroud assemblies with air activated pistons for biasing buffer cavity seals |
| US12352176B1 (en) | 2024-05-31 | 2025-07-08 | Rolls-Royce Corporation | Turbine shroud assemblies with channels for buffer cavity seal thermal management |
| US12577881B2 (en) | 2024-05-31 | 2026-03-17 | Rolls-Royce Corporation | Turbine shroud assemblies with anti-migration seals |
| US12228044B1 (en) | 2024-06-26 | 2025-02-18 | Rolls-Royce Corporation | Turbine shroud system with ceramic matrix composite segments and dual inter-segment seals |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4087199A (en) * | 1976-11-22 | 1978-05-02 | General Electric Company | Ceramic turbine shroud assembly |
| FR2540938B1 (fr) * | 1983-02-10 | 1987-06-05 | Snecma | Anneau de turbine d'une turbomachine |
| FR2540939A1 (fr) | 1983-02-10 | 1984-08-17 | Snecma | Anneau d'etancheite pour un rotor de turbine d'une turbomachine et installation de turbomachine munie de tels anneaux |
| US6733235B2 (en) | 2002-03-28 | 2004-05-11 | General Electric Company | Shroud segment and assembly for a turbine engine |
| FR2887601B1 (fr) | 2005-06-24 | 2007-10-05 | Snecma Moteurs Sa | Piece mecanique et procede de fabrication d'une telle piece |
| CN102272419A (zh) * | 2009-03-09 | 2011-12-07 | 斯奈克玛 | 涡轮环组件 |
| FR2955898B1 (fr) | 2010-02-02 | 2012-10-26 | Snecma | Etancheite amont d'un anneau en cmc dans une turbine de turbomachine |
| US8740552B2 (en) | 2010-05-28 | 2014-06-03 | General Electric Company | Low-ductility turbine shroud and mounting apparatus |
| US8905709B2 (en) | 2010-09-30 | 2014-12-09 | General Electric Company | Low-ductility open channel turbine shroud |
| FR2978197B1 (fr) * | 2011-07-22 | 2015-12-25 | Snecma | Distributeur de turbine de turbomachine et turbine comportant un tel distributeur |
| FR2981602B1 (fr) * | 2011-10-25 | 2017-02-17 | Snecma Propulsion Solide | Procede de fabrication d'un secteur de distributeur de turbine ou redresseur de compresseur en materiau composite pour turbomachine et turbine ou compresseur incorporant un distributeur ou un redresseur forme de tels secteurs |
| EP2971587B1 (fr) | 2013-03-12 | 2020-02-05 | Rolls-Royce Corporation | Ensemble de sillages de pales de turbine |
| FR3033826B1 (fr) * | 2015-03-16 | 2018-11-23 | Safran Ceramics | Ensemble d'anneau de turbine comprenant une pluralite de secteurs d'anneau en materiau composite a matrice ceramique |
| FR3055148B1 (fr) * | 2016-08-19 | 2020-06-05 | Safran Aircraft Engines | Ensemble d'anneau de turbine |
| FR3055146B1 (fr) * | 2016-08-19 | 2020-05-29 | Safran Aircraft Engines | Ensemble d'anneau de turbine |
| FR3055147B1 (fr) * | 2016-08-19 | 2020-05-29 | Safran Aircraft Engines | Ensemble d'anneau de turbine |
-
2017
- 2017-03-16 FR FR1752151A patent/FR3064024B1/fr not_active Expired - Fee Related
-
2018
- 2018-03-13 WO PCT/FR2018/050589 patent/WO2018172655A1/fr not_active Ceased
- 2018-03-13 EP EP18714568.5A patent/EP3596315B1/fr active Active
- 2018-03-13 CN CN201880028328.0A patent/CN110573695B/zh active Active
- 2018-03-13 US US16/494,059 patent/US11028720B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| FR3064024B1 (fr) | 2019-09-13 |
| EP3596315B1 (fr) | 2021-07-28 |
| CN110573695B (zh) | 2022-06-07 |
| WO2018172655A1 (fr) | 2018-09-27 |
| US20210115806A1 (en) | 2021-04-22 |
| CN110573695A (zh) | 2019-12-13 |
| US11028720B2 (en) | 2021-06-08 |
| FR3064024A1 (fr) | 2018-09-21 |
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