The invention relates to a turbine ring for a turbomachine, which assembly comprises a plurality of ring sectors integrally matrix composite ceramic material or a metallic material and a ring support structure.

The scope of the invention is in particular that of the aircraft engine gas turbine. The invention is however applicable to other turbomachinery, such as industrial turbines.

The ceramic matrix composite materials, or CMC, are known for their good mechanical properties which make them suitable for constituting structural elements, and for their ability to conserve these properties at high temperatures.

In aircraft engine gas turbine, improved performance and reduced emissions result in search operation at still higher temperatures. In the case of sets of all-metal turbine ring, it is necessary to cool all of the elements together and in particular the turbine ring which is subjected to high temperature flows. This cooling has a significant impact on engine performance since the flow of coolant used is taken from the main flow of the engine. In addition, the use of metal for the turbine ring limits the possibilities to increase the temperature at the turbine, which nevertheless would improve the performance of aircraft engines.

The use of CMC for different hot parts of such engines has already been considered, especially as the CMC have a density lower than that of conventionally used refractory metals.

Thus, the embodiment of turbine ring segments into a single piece of CMC is in particular described in document US 2012/0027572. The ring sectors comprise an annular base whose inner face defines the inner face of the turbine ring and an outer surface from which extend two leg portions

whose ends are engaged in recesses of a metal frame ring support.

Using CMC ring sectors can significantly reduce ventilation for cooling of the turbine ring. However, the seal between the gas flow passage on the inner side of the ring sectors and the outer side of the ring sectors remains a problem, and especially when the ring sectors has a shape of Pi (π ) reversed. Indeed, this type of ring sector contains no bath which does not allow to install a double horizontal seal at or above the support between the ring sectors and the support structure of the sectors .

This sealing problem also arises for the metal ring sectors that do not have a bath but the processing is greatly simplified thereby.

Purpose and Summary of the Invention

The invention aims at avoiding these drawbacks and proposes to this end a set of impeller ring comprising a plurality of ring sectors matrix composite ceramic material or a metal material forming a turbine ring and a support structure ring having an upstream annular flange and a downstream annular flange, each ring segment having a first portion with an inner annular base face defining the inner face of the turbine ring and an outer surface from which extend radially an upstream leg and a downstream leg, the upstream and downstream legs of each ring sector being maintained between the two upstream and downstream annular flanges of the ring support structure, each ring sector comprising a first tongue of horizontal seal extending along the annular base, the first horizontal sealing tab being received in a first substantially horizontal groove ente in the annular base, an upstream vertical sealing tab extending along the upstream leg, the upstream vertical sealing tongue being accommodated in a vertical groove present in the upstream leg and a first vertical sealing tongue downstream extending along the downstream leg, the first downstream vertical sealing tongue being accommodated in a first vertical groove present in the downstream leg, characterized in that each ring segment further comprises a second horizontal sealing tongue extending over a portion of the annular base above the first horizontal sealing tab, the second horizontal sealing tab being received in a second horizontal groove present in the annular base, and in that a first element angled seal is housed in both the vertical groove present in the upstream leg and the second groove horizont ale while a second angled sealing member is accommodated in both the first horizontal groove and the first vertical groove present in the downstream leg, the first vertical slot opening into the first horizontal groove, while a second or angled sealing member is accommodated in both the second horizontal groove and in this ia first vertical groove in the downstream leg, the first vertical slot opening into the second horizontal groove.

With two horizontal sealing strips superimposed in the radial direction, a double seal is carried out at the base of the ring that reinforces the sealing inter-sector in the ring thereby serially leakage sections, and this while ensuring a redirection of the air flowing on the outer side of the ring toward the upstream, that is to say in the impeller formed by the rotating blades inside the ring. Furthermore, using bent sealing elements allow plugging leaks that may occur at the contact portions between the sealing strips, that is to say at the junctions orthogonal grooves. In the example described herein, the first angled sealing member prevents leakage at the contact portion between the first horizontal strip and the upstream vertical tongue while the second angled sealing member prevents leakage at the contact portion between the first or second horizontal tongue and the downstream vertical tab.

According to one embodiment all of the turbine ring of the invention, each ring segment further comprises a second downstream vertical sealing tongue extending along the downstream leg, the second tongue of downstream vertical seal being housed in a second groove present in the vertical leg

downstream, the downstream second vertical sealing strip being in contact at one of its ends with the second horizontal sealing tab, the second vertical groove present in the downstream leg opening into the second horizontal groove, the second element angled seal being housed both in the second horizontal groove and the second vertical groove present in the downstream leg.

By adding a second vertical sealing strip downstream, it further improves the effectiveness of the seal, a first pressure drop being produced by one of two vertical tabs downstream before the other downstream vertical sealing tongue. Strengthening the seal downstream through the use of two vertical strips is advantageous because the pressure difference between the cavity of the ring and the duct downstream portion is high, thereby increasing the suction force of the air between these two volumes and, consequently, the risk of leaks.

According to a particular characteristic of the set of impeller ring of the invention, a third angled sealing member is accommodated in both the first horizontal groove and the first vertical groove present in the downstream leg. It further reduces the leakage of the contact portions between the sealing tongues downstream in the ring.

According to another embodiment of the set of impeller ring of the invention, each ring segment further comprises a second vertical sealing tongue avai extending along the downstream leg, the second tongue downstream vertical seal being housed in a second vertical groove present in the downstream leg, the second downstream vertical sealing tongue being in contact with the second horizontal sealing tab, the second vertical groove present in the downstream leg opening into the first and second horizontal grooves, the second angled sealing member being housed both in the first horizontal groove and the first vertical groove present in the downstream leg.

By adding a second vertical sealing strip downstream, it further improves the effectiveness of the seal, a first pressure drop being produced by one of two vertical tabs downstream before the other downstream vertical sealing tongue.

According to another embodiment of the set of impeller ring of the invention, the upstream annular flange includes a lip in contact with the upstream leg of each ring sector while the downstream annular flange comprises a lip contact with the downstream leg of each ring sector, the vertical groove present in each ring sector of the upstream leg extending in a direction oblique to the axis of the upstream leg, said vertical groove opening on the outer face of the upstream leg at the lip of the upstream annular flange while the vertical groove present in the downstream leg of each ring sector extends in a direction oblique to the axis of the downstream leg, said vertical groove opening on the external face of the downstream leg at the lip of the downstream annular flange.

With the upstream and downstream vertical grooves extending obliquely in the legs of each ring sector so as to open at the bearing portions with the annular flanges of the ring support structure, the leakage is reduced inter- areas at these bearing portions.

According to a particular characteristic of the set of impeller ring of the invention, the two annular flanges of the ring support structure put stress on the lugs of the ring sectors and in that at least one of flanges of the ring support structure is elastically deformable in the axial direction of the ring.

Thanks to the presence of at least one elastically deformable flange, the contact between the flanges of the ring support structure and the legs of the ring segments can be maintained independent of temperature variations.

According to another particular characteristic of the set of impeller ring of the invention, the latter further comprises a plurality of pins engaged both in at least one of the annular flanges of the ring support structure and legs of the ring sectors facing said at least annular flange. The pins make it possible to block any rotation of the ring sectors in the ring support structure and to maintain the radially into said structure.

Brief description of the drawings.

The invention will be better understood by reading given below, for information purposes but not limited to, reference to the accompanying drawings, wherein:

- Figure 1 is a radial half-section view showing one embodiment of a set of turbine ring according to the invention;

- Figures 2A and 2B are partial schematic perspective views showing the positioning of sealing tongues in a ring sector of the entire turbine ring of Figure 1;

- Figures 3 to 6 are views in radial half-section each showing another embodiment of a set of turbine ring according to the invention.

Detailed description of embodiments

Figure 1 shows a set of high-pressure turbine ring comprising a ring of turbine 1, here a ceramic matrix composite material (CMC), and a metal frame ring support 3. The turbine 1 ring surrounds a rotating vane assembly 5. the turbine ring 1 is formed of a plurality of ring sectors 10, Figure 1 is a radial sectional view along a plane passing between two areas contiguous rings. DA arrow indicates the axial direction relative to the turbine ring 1 while the CD arrow indicates the radial direction relative to the turbine ring 1.

Each ring sector 10 has a section substantially in the form Pi (π) inverted with an annular base 12 whose inner face coated with a layer 13 of abradable material and / or a thermal barrier defines the flow passage gas flow into the turbine. Upstream and downstream legs 14, 16 extend from the outer face of the annular base 12 in the radial direction DR. The terms "upstream" and "downstream" are used herein with reference to the flow direction of the gas flow in the turbine (arrow F).

The ring support structure 3 which is integral with a turbine housing 30 includes an upstream annular radial flange 32 having a lip 34 on its side facing the upstream tabs 14 of ring segments 10, the lip 34 being support on the external face 14a of the upstream tabs 14. on the downstream side, the ring support structure comprises a downstream annular radial flange 36 having a lip 38 on its side facing the downstream legs 16 of the ring sectors 10, the as lip 38 bears on the external face 16a of the downstream tabs 16.

The legs 14 and 16 of each ring sector 10 is mounted prestressed between the annular flanges 32 and 36 so that the flanges exert, at least "cold", that is to say at an ambient temperature about 20 ° C, but also in all operating temperatures of the turbine, constrain the tabs 14 and 16 and therefore clamping of the sectors by the flanges. This constraint is maintained at all temperatures to which the ring assembly may be subjected during operation of the turbine and is controlled, that is to say without over-constrain the ring sectors, thanks to the presence of at least one elastically deformable flange as explained above. In addition, conventionally, ventilation holes 32a formed in the flange 32 allow supplying cooling air to the outside of the turbine ring 10. The ring sectors 10 are mounted one after the other by spacing of the radial flange 36 annular downstream pulling thereon via a hook 39 in the axial direction DA in order to increase the spacing between the flanges 32 and 36 and allow insertion of the tabs 14 and 16 between the flanges 32 and 36 without risk of damage.

Moreover, in the example described here, the ring sectors 10 are also maintained by locking pins. More specifically and as illustrated in Figure 1, the pins 50 are engaged in both the upstream annular radial flange 32 of the ring support structure 3 and in the upstream leg 14 of the ring sectors 10. To this end , the pawns

50 each pass through a respective hole 33 formed in the upstream annular radial flange 32 and an orifice 15 formed in each upstream flap 14, the orifices 33 and 15 being aligned when fitting the ring segments 10 of the ring support structure 3. Similarly, pawns

51 are engaged both in the radial annular flange 36 downstream of the ring support structure 3 and the downstream leg 16 of the ring sectors 10. To this end, the pins 51 each pass through a respective orifice 37 formed in the downstream radial annular flange 36 and a tab 17 provided each downstream port 16, the ports 37 and 17 being aligned during assembly of the ring sectors 10 of the ring support structure 3, According to the invention, the ring is sealed by sealing strips and bent joints. More specifically, as shown in Figures 1, 2A and 2B, each ring sector 10 is provided with a first horizontal sealing strip 21 which extends over almost the entire length of the annular base 12 between the legs upstream and downstream 14 and 16, a second horizontal sealing tongue 20 disposed above the first horizontal strip and which extends over part of the length of the annular base 12, a sealing tongue upstream vertical 22 which extends along the upstream leg 14 and a vertical sealing tongue 23 which extends downstream along the downstream leg 16.

Each sealing strip is accommodated in grooves facing each other in the facing edges of two adjacent ring segments. To this end, each ring sector 10 comprises a first horizontal groove 41 formed in the annular base 12 and in which is housed the first horizontal sealing strip 21, a second horizontal groove 40 formed in the annular base 12 above of the groove 41 and in which is housed the second horizontal sealing strip 20, an upstream vertical groove 42 formed in the upstream leg 14 in which is housed the vertical sealing tongue upstream 22 and a vertical groove 43 formed in the downstream downstream lug 16 in which is housed the vertical sealing strip 23. the second downstream horizontal groove 40 opens on one side in the lower part of the vertical groove 42 and upstream of the other side in the lower part of the vertical groove downstream 43. Thus, the second horizontal sealing strip 20 is contacted at one end 20a with the sealing tongue verti upstream block 22 and in contact at the other end 20b with the downstream vertical tongue 23. Furthermore, the downstream vertical groove 43 opens into the first horizontal groove 41 so that the lower end 23b of the vertical sealing tongue downstream 23 is in contact with the first horizontal sealing strip 21. on the first horizontal groove 41, it is preferably closer to the inner face of the ring sector so that the first seal tab 21 located closer to the vein. This reduces the set inter-sector and its impact on the tips of the blades.

Figures 1, 2A and 2B illustrate a single ring sector 10 wherein the tabs 20, 21, 22 and 23 are partially inserted respectively into the grooves 40, 41, 42 and 43. Part of the tongues 20, 21, 22 and 23 projecting from the ring section 10 (Fig 2B) are inserted into corresponding grooves in the adjacent ring segment (not shown in figures 1, 2A and 2B).

The tongues 20, 21, 22 and 23 are for example metal and are preferably mounted with cold clearance in the grooves 40, 41, 42 and 43 to ensure the sealing function at the temperatures encountered in service. By way of nonlimiting examples, the sealing strips may be made of alloy cobalt base alloys such as HA 188 or HS 25, high performance metallic material (high melting point), molybdenum, tungsten, or CMC composite material.

In addition, a first sealing member or elbow joint 24 is housed in both the upstream vertical groove 42 and the second horizontal groove 40 while a second sealing element or elbow joint 25 is housed in both the first horizontal groove 41 and the downstream vertical groove 43. the angled seals 24 and 25 may be formed from bent sheet metal. By way of nonlimiting examples, the angled joints can be made cobalt-based alloy such as alloys HA 188 or HS 25, high performance metallic material (high melting point), molybdenum, tungsten, or by material CMC composite. Optionally, a third sealing member or elbow joint may be used, here the sealing element or elbow joint 27 housed in both the second horizontal groove 40 and the first vertical groove 43 against the second elbow joint 25.

As well as for the sealing strips 20, 21, 22 and 23, the angled seals 24, 25 and 27 are partially inserted respectively into the grooves 42 and 40 within grooves 41 and 43 and in the grooves 40 and 43. part 24 and 25 angled seals projecting from the ring section 10 (Fig 2B) are inserted into corresponding grooves in the adjacent ring segment (not shown in figures 1, 2A and 2B).

With two horizontal sealing strips superimposed in the radial direction DR, a double seal at the base of the ring is achieved which enhances the inter-sector in the sealing ring while maintaining the circulating air redirection the outer side of the ring toward the upstream, that is to say in the impeller formed by the rotating blades inside the ring. Furthermore, the use of angled seals 24 and 25 used to block the leakage that may occur at the contact portions between the tabs sealing, that is to say at the junctions orthogonal grooves. In the example described here, the elbow joint 24 prevents leakage at the contact portion between the second horizontal tongue 20 and the upstream vertical tongue 22 while the elbow joint 25 prevents leakage at the contact portion between the first horizontal tongue 21 and the vertical tongue 23 downstream.

3 illustrates a set of high-pressure turbine ring according to another embodiment of the invention. In the ring assembly of Figure 3, the metal frame ring support is identical to the metal frame ring support 3 described above with reference to Figures 1, 2A and 2B and will not be described to again for simplicity. The ring assembly of Figure 3 differs from that described above in relation to Figures 1, 2A and 2B in that a second downstream vertical sealing tongue is present in the downstream leg of each ring sector.

More specifically, as shown in Figure 3, each ring sector 100 is provided with a first horizontal sealing tab 121 which extends over almost the entire length of the annular base 112 between the upstream and downstream legs 114 and 116, a second horizontal sealing tongue 120 disposed above the first horizontal strip and which extends over part of the length of the annular base 112, a vertical sealing tongue upstream 122 extends along the upstream leg 114, a first vertical sealing tongue 123 which extends downstream along the downstream leg 116 and second vertical sealing tongue 126 which extends downstream the along the downstream leg 116 upstream of the first tab 123.

Each tab seal is accommodated in grooves facing each other in the facing edges of two adjacent ring segments. AT

For this purpose, each ring sector 100 comprises a first horizontal groove 141 formed in the annular base 112 and in which is housed the first horizontal sealing tab 121, a second horizontal groove 140 formed in the annular base 112 above the groove 141 and in which is housed the second horizontal sealing tab 120, an upstream vertical groove 142 formed in the upstream leg 114 in which is housed the vertical sealing tongue upstream 122, a first vertical groove 143 formed in the downstream downstream leg 116 which accommodates the first vertical sealing tongue 123 downstream and a downstream second vertical groove 146 formed in the downstream leg 116 in which is housed the second downstream vertical sealing tongue 126. the second horizontal groove 140 opens d one side in the lower part of the vertical groove 142 and upstream of the other side in the a lower portion downstream of the second vertical groove 146. Thus, the second horizontal sealing tongue 120 is in contact at one end 120a with the vertical sealing strip upstream 122 and in contact with the other end 120b with the second tongue downstream vertical 126. further, the first downstream vertical groove 143 opens into the first horizontal groove 141 so that the lower end 123b of the vertical sealing tongue 123 is in downstream contact with the first horizontal sealing tab 121.

A tongue 127 is further added between the top ends of vertical tabs 123 and 126 in order to ensure continuity in the sealing formed by the two vertical tongues. The tongue 127 is housed in a horizontal slot 147 opening into the upper part of the vertical grooves 143 and 146.

In addition, a first elbow joint 124 is housed in both the upstream vertical groove 142 and the second horizontal groove 140 while a second elbow joint 125 is housed in both the second horizontal groove 140 and the second groove downstream vertical 146. The angled seals 124 and 125 may be formed from bent sheet metal. Other materials such as those mentioned above are also possible. Optionally, a third sealing member or elbow joint (not shown in Figure 3) can be accommodated in both the first horizontal groove 141 and the first vertical groove 143.

With two horizontal sealing strips superimposed in the radial direction DR, a double seal at the base of the ring is achieved which enhances the inter-sector in the sealing ring while maintaining the circulating air redirection the outer side of the ring toward the upstream, that is to say in the impeller formed by the rotating blades inside the ring. Furthermore, the use of angled seals 124 and .125 allow plugging leaks that may occur at the contact portions between the sealing strips and thus put in series sections leaks downstream. In the example described here, the elbow joint 124 prevents leakage at the contact portion between the second horizontal tongue 120 and the upstream vertical tab 122 while the elbow joint 125 prevents leakage at the contact portion between the second horizontal tongue 120 and the downstream vertical tab 126. Finally, adding a second vertical sealing strip downstream, it further improves the effectiveness of the seal, a first pressure drop being produced by the second vertical tab 126 downstream before the first vertical sealing tongue 123 downstream.

4 illustrates a set of high-pressure turbine ring according to another embodiment of the invention which differs from that of Figure 3 in that the second toggle joint is located at a different position. In the ring assembly of Figure 4, the metal frame ring support is identical to the metal frame ring support 3 described above with reference to Figures 1, 2A and 2B and will not be described to again for simplicity.

More specifically, as shown in Figure 4, each ring sector 200 comprises:

- a first horizontal sealing strip 221 housed in a first horizontal groove 241 which extends over almost the entire length of the annular base 212,

- a second horizontal sealing strip 220 housed in a second horizontal groove 240 which extends over a portion of the annular base 212,

- a vertical sealing tongue 222 upstream housed in an upstream vertical groove 242 that extends along the upstream leg 214,

- a first vertical sealing tongue downstream 223 housed in a first downstream vertical groove 243 that extends along the downstream leg 216, and

- a second vertical sealing tongue downstream 226 housed in a second downstream vertical groove 246 that extends along the downstream leg 216 upstream of the first tab 223.

The second horizontal slot 240 opens at one side in the lower part of the upstream vertical groove 242 and the other side in the lower portion of the second downstream vertical groove 246. Thus, the second horizontal sealing tab 220 is a contact end 220a with the vertical sealing strip upstream 222 and in contact with the other end 220b with the second downstream vertical tab 226. in addition, the first downstream vertical groove 243 opens into the first horizontal groove 241 so that the lower end 223b of the vertical sealing strip 223 downstream is opposite of the first horizontal sealing tab 221. Similarly, the second downstream vertical groove 246 opens into the first horizontal groove 241 so that the lower end 226b of the downstream vertical sealing tongue 226 is opposite the first horizontal sealing tongue 221.

A tongue 227 is further added between the top ends of vertical tabs 223 and 226 in order to ensure continuity in the sealing formed by the two vertical tongues. The tongue 227 is housed in a horizontal slot 247 opening into the upper part of the vertical grooves 243 and 246.

In addition, a first elbow joint 224 is housed in both the upstream vertical groove 242 and the second horizontal groove 240 while a second elbow joint 225 is housed both in the first horizontal groove 241 and the first groove downstream vertical 243. The angled seals 224 and 225 may be formed from bent sheet metal. Other materials such as those mentioned above are also possible. Optionally, a third sealing member or elbow joint (not shown in Figure 4) can be accommodated in both the second horizontal groove 240 and the second vertical groove 246.

With two horizontal sealing strips superimposed in the radial direction DR, a double seal at the base of the ring is achieved which enhances the inter-sector in the sealing ring while maintaining the circulating air redirection the outer side of the ring toward the upstream, that is to say in the impeller formed by the rotating blades inside the ring. Furthermore, the use of angled seals 224 and 225 allow plugging leaks that may occur at the contact portions between the sealing strips and thus put in series sections leaks downstream. In the example described here, the elbow joint 224 prevents leakage at the contact portion between the second horizontal tongue 220 and the upstream vertical tab 222 while the elbow joint 225 prevents leakage at the contact portion between the first horizontal tongue 221 and the first downstream vertical tab 243. Finally, adding a second vertical sealing strip downstream, it further improves the effectiveness of the seal.

claims.
CLAIMS

1. A turbine ring assembly comprising a plurality of ring sectors (10) forming a turbine ring (1) and a ring supporting structure (3) comprising an upstream annular flange (32) and an annular flange downstream (36), each ring segment (10) having a first portion annular base (12) with an inner face defining the inner face of the impeller ring (1) and an outer face from which s' extend radially an upstream leg (14) and a downstream leg (16), the upstream and downstream flaps (14, 16) of each ring sector (10) being held between the two upstream and downstream annular flanges (32, 36) the ring support structure (3), each ring segment (10) comprising a first horizontal sealing tongue (21) extending along the annular base, ia first horizontal sealing tongue (21 ) being housed in a first horizontal groove (41) present in the annular base (12), a tongue of eta upstream vertical nchéité (22) extending along the upstream leg (14), the upstream vertical sealing tongue (22) being accommodated in a vertical groove (42) present in! has upstream leg (14) and a first downstream vertical sealing tongue (23) extending along the downstream leg (16), the first vertical sealing tongue downstream (23) being housed in a first vertical groove (43) present in the downstream leg (16 )

characterized in that each ring sector (10) further comprises a second horizontal sealing tongue (20) extending over a portion of the annular base above the first horizontal sealing strip (21) following the radial direction of the ring, the second horizontal sealing tongue (20) being housed in a second horizontal groove (40) present in the annular base (12), in that a first angled sealing member (24 ) is accommodated in both the vertical groove (42) present in the upstream leg (14) and in the second horizontal groove (40) while a second angled sealing member (25) is housed in both the first horizontal groove (41) and the first vertical groove (43) present in the downstream leg (16), the first vertical groove (43) opening into the first horizontal groove (41), or while a second element

angled seal is housed in both the second horizontal groove (40) and the first vertical groove (43) present in the downstream leg (16), the first vertical groove (43) opening into the second horizontal groove (40 )

and in that all the turbine ring further comprises a plurality of pins (50; 51) engaged both in at least one annular flanges (32; 36) of the ring support structure (3 ) and legs (14; 16) of the ring sectors (10) opposite said at least annular flange (32; 36).

2. A turbine ring assembly according to claim 1, characterized in that each ring segment (100) further comprises a second downstream vertical sealing tongue (126) extending along the downstream leg (116 ), the second downstream vertical sealing tongue (126) being housed in a second vertical groove (146) present in the downstream leg (16), the second downstream vertical sealing tongue (126) being in contact with one of its ends with the second horizontal sealing strip (120), the second vertical groove (146) present in the downstream leg (116) opening into the second horizontal groove (140), the second angled sealing member (125) being received in both the second horizontal groove (140) and the second vertical groove (146) present in the downstream leg (116).

3. A turbine ring assembly according to claim 2, characterized in that a third angled sealing element (327) is accommodated in both the first horizontal groove (341) and the first vertical groove (343) present in the downstream leg (316).

4. A turbine ring assembly according to claim 1, characterized in that each ring segment (210) further comprises a second downstream vertical sealing tongue (226) extending along the downstream leg (216 ), the second downstream vertical sealing tongue (226) being housed in a second vertical groove (246) present in the downstream leg (216), the second downstream vertical sealing tongue (226) being in contact with the second tongue horizontal sealing (220), the second vertical groove (246) present in the downstream leg (216) opening into the first and second horizontal grooves (241, 240), the second angled sealing member (225) being housed both in the first horizontal groove (241) and the first vertical groove (243) present in the downstream leg (216).

5. A turbine ring assembly according to claim 1, characterized in that the upstream annular flange (32) includes a lip (34) in contact with the upstream leg of each ring sector (10) while the annular flange downstream (36) includes a lip (38) in contact with each ring sector of the downstream leg (10),

and in that the vertical groove (442) present in the upstream leg (414) of each ring segment (410) extends in an oblique direction with respect to the axis of the upstream leg, said vertical groove (442 ) opening on the outer face of the upstream plate (414) at the lip (34) of the upstream annular flange (32) while the vertical groove (443) present in the downstream leg (416) of each sector of ring (410) extends in an oblique direction with respect to the axis of the downstream leg, said vertical groove (443) opening on the external face of the downstream leg (416) at the lip (38) of the downstream annular flange (36).

6. A turbine ring assembly according to claim 5, characterized in that the second angled sealing member (425) is accommodated in both the first horizontal groove (441) and the first vertical groove (443) has in the downstream leg (416).

7. A turbine ring assembly according to any one of claims 1 to 6, characterized in that characterized in that the two annular flanges (32, 36) of the ring support structure (3) exert a constraint on the tabs (14, 16) of the ring sectors (10) and in that at least one (36) of the flanges of the ring support structure (3) is elastically deformable in the axial direction of the ring .