Turbine engine rotor element assembly equipped with a sealing device

Abstract

The invention relates to a turbine engine assembly (1) comprising a first rotor element (2) and a second rotor element (3), the first and second rotor elements extending around a longitudinal axis X and being coupled to each other by a toothed coupling (4), the first rotor element comprising teeth (6) and the second rotor element (3) comprising complementary teeth (9), the teeth and the complementary teeth extending along the longitudinal axis and forming the toothed coupling. According to the invention, the first and second rotor elements each comprise a first and a second radial flange (16, 17), the first and second radial flanges being annular and arranged facing each other, and the assembly comprises a sealing device (14) configured to ensure that the toothed coupling is sealed at the first and second flanges.

Description

Technical Field

[0001] This invention relates to a turbine engine assembly including rotor elements connected by a toothed coupling of the type of curvic coupling. The invention also relates to a turbine engine including such an assembly and a method for mounting such an assembly. Background Technology

[0002] Prior art includes document FR-A1-3077327, which describes rotor elements connected to each other by bolted fasteners to ensure torque transmission between the rotor elements. This document provides an annular member with a radial sealing element and an anti-rotation system for the annular member relative to one of the rotor elements. The anti-rotation system includes radial teeth disposed on the rotor element and an axial pin carried by the annular member. However, this assembly is not entirely satisfactory.

[0003] It is known to connect two rotor elements extending around a longitudinal axis using a toothed coupling. The first element includes a series of axial teeth that engage with another series of complementary teeth on the second element, thereby forming the toothed coupling.

[0004] This type of connector is called a "bent connector" or liaison crabot. On the one hand, this connector facilitates the assembly between the first and second components; on the other hand, it ensures precise centering and positioning of the first and second components relative to each other. This toothed connector also enables the transmission of torque via rotating components and relative axial and radial displacement between the first and second components.

[0005] Gap may occur during operation and / or be caused by the construction of the teeth at their tops and the bottoms of the adjacent hollow portions of the corresponding teeth. These gaps may pose a risk of fluid leakage, such as air flowing radially inside and / or outside the toothed coupling.

[0006] Air flowing through the connector can cause thermal expansion or contraction of the first and second components, thus reducing their service life. Similarly, gas leakage from components where air has been compressed involves energy loss and affects the efficiency of turbine engines.

[0007] Therefore, it is necessary to address these leakage risks at the connector.

[0008] The object of this invention is to provide a simple, effective and economical solution for preventing fluid from flowing to either side of the geared connector of the rotor assembly of a turbine engine. Summary of the Invention

[0009] This is achieved according to the invention via a turbine engine assembly including a first rotor element and a second rotor element extending about a longitudinal axis X and connected to each other by a toothed coupling. The first rotor element includes teeth, and the second rotor element includes complementary teeth extending along the longitudinal axis and forming the toothed coupling. The first rotor element and the second rotor element each include a first radial flange and a second radial flange, which are annular and arranged opposite to each other. The assembly includes a sealing device configured to ensure a seal of the toothed coupling at the first flange and the second flange.

[0010] Therefore, this solution enables the achievement of the aforementioned objectives. Specifically, the sealing device is configured to at least partially rest on a section of one of these flanges and in the path of fluid leakage, thereby preventing the flow of fluids (such as air) outside or inside the toothed connector. This results in improved service life for the teeth, which are capable of properly transmitting torque between the two rotor elements. This also improves the performance of the turbine engine.

[0011] The component also includes one or more of the following features, used individually or in combination:

[0012] - An attachment device configured to securely hold the sealing device together with the first flange and the second flange.

[0013] - The first flange and the second flange each extend radially inward from the toothed connector.

[0014] - The first flange includes a groove open to a first surface of the first flange, and the sealing device is used to be at least partially accommodated within the groove.

[0015] - The sealing device includes an annular corrugated metal plate.

[0016] - The sealing device includes an annular shield for at least partially covering the free ends of the first flange and the second flange.

[0017] - The shield is generally U-shaped and includes a longitudinal section, a first branch, and a second branch.

[0018] - The shield includes multiple annular sectors, each extending along the circumferential direction.

[0019] - The attachment device includes a threaded rod for passing through at least one hole through the first flange and an opening through the second flange. The attachment device also includes a fastening member for mounting on the threaded rod to secure the threaded rod to at least one of the first flange and the second flange.

[0020] - The first branch and the second branch include a plurality of slots for the threaded rod to pass through, and the first branch and the second branch include support areas respectively resting on the second surfaces of the first flange and the second flange.

[0021] - The first flange and the second flange each extend radially outward from the toothed connector.

[0022] - The ring-shaped metal plates are separate.

[0023] - The sealing device is installed between the flanges.

[0024] - The sealing device is installed on the outside of the flange.

[0025] The present invention relates to a turbine engine, comprising at least one turbine engine component having any of the aforementioned features.

[0026] The present invention also relates to an aircraft comprising at least one turbine engine as described above.

[0027] The present invention also relates to a method for mounting a turbine engine assembly as described above, the method comprising:

[0028] -The steps of providing the sealing device, and

[0029] - The step of placing the sealing device at the first radial flange and the second radial flange to block fluid flow through the toothed connector.

[0030] The method also includes one or more of the following features or steps, used individually or in combination:

[0031] - The step of attaching the attachment device to the first flange and the second flange to securely hold the sealing device together with the first flange and the second flange.

[0032] - The step of placing the sealing device includes the sub-step of placing the sealing device in the groove of the first flange.

[0033] The step of placing the sealing device includes the sub-step of placing the sealing device around the first radial flange and the second radial flange to at least cover the free ends of the first flange and the second flange.

[0034] - The step of placing the sealing device includes the following sub-step, which includes: joining or nesting the annular sectors together to form the annular shield.

[0035] - The steps for installing the attachment device include:

[0036] - The sub-step of inserting the threaded rod into the through hole of the second flange.

[0037] - The sub-step of fastening the threaded rod to the second flange.

[0038] - The sub-step of inserting the threaded rod mounted on the second flange into the through hole of the first flange such that the second flange faces the groove.

[0039] - The sub-step of fastening the threaded rod to the first flange to fix the flanges together.

[0040] - The steps for installing the attachment device include:

[0041] - Sub-steps of inserting the threaded rod into the holes of the first and second branches of the protective cover, and inserting it into the through holes and through openings of the first and second flanges.

[0042] - The sub-step of fastening the threaded rod to the first flange and the second flange to fix these flanges to each other. Attached Figure Description

[0043] The invention will be better understood by reading the following detailed explanatory description of embodiments of the invention given only as illustrative and non-limiting examples, and by referring to the accompanying drawings, in which other objects, details, features, and advantages of the invention will become clearer:

[0044] [ Figure 1 ] Figure 1 This is a schematic partial axial cross-sectional view of an example of two rotor elements of a turbine engine connected together by a coupling according to the present invention;

[0045] [ Figure 2 ] Figure 2 An example of a toothed coupling between two rotor elements of a turbine engine according to the present invention is shown;

[0046] [ Figure 3 ] Figure 3A turbine engine assembly according to the invention is shown, equipped with a sealing device and an attachment device for attachment between two radial flanges of a rotor element.

[0047] [ Figure 4a ] Figure 4a A corrugated sealing member of the sealing device according to the invention is shown in cross-section;

[0048] [ Figure 4b ] Figure 4b A perspective view shows a sealing member according to the preceding figure of the present invention;

[0049] [ Figure 5 ] Figure 5 A second flange of a second rotor element according to the invention is shown, wherein an attachment member is mounted on the second flange;

[0050] [ Figure 6 ] Figure 6 An example of a first flange of a first rotor element according to the invention and a fastening member for engaging with an attachment member in the previous figure is shown;

[0051] [ Figure 7 ] Figure 7 Another embodiment of a turbine engine assembly according to the invention is shown, equipped with a sealing device and an attachment device between a first rotor element and a second rotor element;

[0052] [ Figure 8 ] Figure 8 This is a side view of an example of an annular sealing member for engaging with a radial flange of a rotor element according to the present invention;

[0053] [ Figure 9 ] Figure 9 A partial perspective view of the first sector of the sealing member for mating with the second sector of the sealing member is shown;

[0054] [ Figure 10 ] Figure 10 A partial perspective view of the first sector of the sealing member according to the invention, which engages with the second sector of the sealing member; and

[0055] [ Figure 11 ] Figure 11 This is an example of a flowchart of a method for installing sealing and attachment devices in a turbine engine assembly according to the present invention. Detailed Implementation

[0056] Figure 1A turbine engine assembly 1 is shown, which includes a first rotor element 2 and a second rotor element 3, each rotor element extending about the longitudinal axis X of the turbine engine. The first rotor element 2 and the second rotor element 3 are connected to each other by a toothed coupling 4 of the "bent coupling" type.

[0057] These first rotor elements 2 and 3 are, for example, the first and second disks of a high-pressure compressor in a turbine engine, which rotate about a longitudinal axis X. Of course, these two rotor elements can be two turbine engine shafts, such as a fan shaft and a turbine shaft.

[0058] Turbine engines typically include various ducts or orifices that allow fluids (such as air) to flow through them, for example, to ventilate and / or pressurize turbine engine components (bearing lubrication housings), or to allow oil to flow through them to cool and / or lubricate other turbine engine components (guide bearings). Air may originate from a main airflow that flows via a low-pressure compressor. In the case of a turbofan engine (not shown), this typically includes a fan that generates an airflow that is split into a main flow and a secondary flow at the nose of a splitter. The main flow flows from upstream to downstream through a low-pressure compressor, a high-pressure compressor, a combustion chamber, a high-pressure turbine, and a low-pressure turbine (not shown). These components through which the main flow passes form the gas generator of the turbine engine. The secondary flow flows radially outward from the gas generator.

[0059] In this specification, the terms “upstream,” “downstream,” “axial,” and “axially” are defined relative to the gas flow in the turbine engine and are defined herein along the longitudinal axis X. Similarly, the terms “radial,” “radially,” “inner,” and “outer” are defined relative to the radial axis Z perpendicular to the longitudinal axis X and relative to the distance from the longitudinal axis X.

[0060] Reference Figure 2 The first rotor element 2 includes a first cylindrical housing 5 extending axially. The housing 5 includes a first annular series of teeth 6 at its free end (the downstream end in this case). Each tooth 6 extends axially. These teeth 6 are evenly spaced around a longitudinal axis, and a hollow portion 7 is formed circumferentially between adjacent teeth 6.

[0061] The second rotor element 3 includes a second cylindrical housing 8 that also extends axially. The second cylindrical housing 8 includes a second annular series of complementary teeth 9 at its free end (upstream in this case), which are complementary to the teeth of the first element 2. These complementary teeth 9 extend axially. Like the teeth of the first element 2, these complementary teeth 9 are evenly spaced, and complementary hollow portions 10 are formed circumferentially between each pair of adjacent complementary teeth. In this example, the housings 5 ​​and 8 face each other. These housings also have approximately the same diameter.

[0062] Tooth 6 and complementary tooth 9 are oriented toward each other (in the axial but opposite directions).

[0063] The teeth 6 of the first element 2 are used to engage in the complementary hollow portion 10 of the second element 3, and the complementary teeth 9 of the second element 3 are used to engage in the hollow portion 7 of the first element 2. This forms a toothed connector or "bent connector" between the first element 2 and the second element 3. The toothed connector 4 enables the transmission of torque between the first element 2 and the second element 3.

[0064] Each tooth 6 or complementary tooth 9 includes a top 11 connected to two lateral surfaces 12. The two lateral surfaces 12 are opposite to each other in the circumferential direction. Each of these teeth 6 and complementary teeth 9 also includes two longitudinal surfaces opposite to each other along a radial axis, and each of the two longitudinal surfaces extends axially over the surface of the respective housing 5, 8. The hollow portion 7 and the complementary hollow portion 10 include bottoms connected to the lateral surfaces of the teeth 6 and complementary teeth 9, respectively. Advantageously, the surfaces 12 are flat. Advantageously, each tooth 6 or complementary tooth 9 has a trapezoidal shape.

[0065] exist Figure 2 In this configuration, the top 11 of each complementary tooth 6, 9 faces the bottom 13 of the hollow section 7 / complementary hollow section 10, respectively. However, here, the top 11 does not contact or rest on the bottom of the hollow section, which may allow fluid (especially air) to flow. In fact, in the case of a compressor rotor disc, air can flow radially from the outside of the disc to the inside. In this case, hot air from the main pipe passing through the compressor and flowing into the disc causes efficiency loss in the turbine engine. On the one hand, air leakage is caused by the gap between the first and second rotor elements during installation, and on the other hand, by the slight displacement between the teeth. Conversely, air can flow through the inside of the disc and radially outward through the toothed connector 4 toward the blades carried by the disc.

[0066] Figure 3 A sealing device 14 is shown, which is configured to block the flow of fluid through the toothed connector 4. The sealing device 14 mates with radial flanges equipped with the first rotor element 2 and the second rotor element 3.

[0067] These radial flanges are connected to each other by attachment devices 15, which are used to hold the sealing device 14 in place in an optimal manner. Attachment devices 15 also allow the components to be tightened and attached so that the sealing device 14 is effectively held in place.

[0068] Specifically, the first element 2 includes a first annular flange 16 that extends radially inward from the first housing 5. The first flange 16 is also annular and centered on the longitudinal axis X. The second element 3 also includes a second annular flange 17 that also extends radially inward. Alternatively, the first flange 16 and the second flange 17 extend radially outward from the first housing 5 and the second housing 6, respectively. The first flange 16 and the second flange 17 face each other, and there is a gap or void between them.

[0069] exist Figure 3 and Figure 6 In the first flange 16, there are first surfaces 18 and second surfaces 19 opposite each other along the longitudinal axis X. The first flange 16 includes an annular groove 20 for at least partially receiving the sealing device 14. The groove 20 has a U-shaped cross-section and is disposed in the first surface 18 of the first flange 16. Specifically, the groove 20 is open on the first surface 18. This is coaxial with the longitudinal axis X. The groove 20 also includes a bottom 21, a first wall 22, and a second wall 23 extending from the bottom 21 along the longitudinal axis and opposite each other (here, along the radial axis). The first wall 22 is supported by an axial lug 24 (formed by a shoulder) formed at the free end 25a of the first flange 16. In other words, the axial cross-section of the first radial flange 16 is generally L-shaped. The axial lug 24 faces radially upward toward a rib 26 extending along the longitudinal axis. The rib 26 supports the second wall 23 of the groove 20. In this example, the length of the axial lug 24 along the longitudinal axis X is greater than the length of the rib 26.

[0070] Reference Figure 3 , Figure 4a and Figure 4bThe sealing device 14 is formed of an annular (360°) metal plate 27 having an axis A. However, the metal plate 27 is separate to facilitate its installation. The metal plate 27 is intended to be received in the groove 20. The metal plate 27 is corrugated. The cross-section of the metal plate 27 is approximately Ω-shaped (uppercase omega). The metal plate 27 is radially arranged between the axial lug 24 and the rib 26. In this example, the metal plate 27 includes an annular body 28 having two circumferential ends facing each other. The metal plate 27 also includes two base plates (referred to as the first base plate 29a and the second base plate 29b) that are bent on both sides of the body 28 (along axis A). The body 28 has a top 30 for resting on the first wall 22 of the groove 20. The first base plate 29a is intended to rest at least partially on a first support surface 31. The first support surface 31 is arranged between the rib 26 and the bottom 21 of the groove 20. The first supporting surface 31 is particularly chamfered, which has a radius of curvature complementary to that of the first base plate 29a. The height h1 of the metal plate 27 (see...) Figure 4a ) and the height h2 of trench 20 (see Figure 6 The same applies. The height h1 is measured between vertex 30 and the plane tangent to the poles of base plates 29a and 29b.

[0071] The second base plate 29b is supported by Figure 5 The second flange 17 is visible on the second annular support surface 32. A portion of the flange and the second support surface 32 are used to close the groove 20 to capture and hold the metal plate 27 within the groove 20. On the other hand, the second annular surface 32 (by closing the groove 20) makes it possible to prevent relative to Figure 1 The radial axis of the metal plate 27 is pushed radially inward by pressure from the upper portion (radially outside the connector) and prevents air from escaping from the lower portion (radially inside the connector). The axial lug 24 also allows for the containment of the metal plate 27 in the event of damage or even breakage.

[0072] Metal plate 27 is made of steel.

[0073] Reference Figure 6 The first flange 16 also includes at least one through hole 33 passing through the first flange 16 on both sides along axis B. The axis B of the through hole is parallel to the longitudinal axis X. The first flange 16 includes a plurality of holes 33 regularly distributed around the longitudinal axis X. Each hole 33 is used to at least partially receive the attachment device 15. The first flange 16 also includes at least one countersunk hole 34, which is coaxial with the through hole 33. The countersunk hole 34 is annular. The countersunk hole 34 opens to a first surface 18 of the first flange 16.

[0074] Reference Figure 5The second flange 17 includes at least one aperture 35 that passes through the second flange 17 on both sides along the longitudinal axis X. The second flange 17 includes a plurality of apertures 35 regularly distributed around the longitudinal axis X. In particular, each aperture 35 opens to a third surface 36 and a fourth surface 37 opposite to each other along the longitudinal axis X. An annular protrusion 38 is disposed on the third surface 36 of the second flange 17. The protrusion 38 extends axially from the third surface 36 of the second flange 17. A chamfer is defined between the protrusion 38 and the third surface 36. This chamfer corresponds to a second support surface 32 on which the second base plate 29b of the metal plate 27 rests. The axis of each through aperture 35 is parallel to the longitudinal axis. In this example, the axes of the through hole and the through aperture are coaxial. Each aperture 35 is used to at least partially receive the attachment device 15.

[0075] exist Figure 5 and Figure 6 In this attachment, the attachment device 15 includes at least one threaded rod 39 having a generally straight cylindrical body along axis C. Each threaded rod 39 is equipped with external threads 40 and is used to engage in holes 33 and orifices 35 of the first flange 16 and the second flange 17. The threaded rod 39 includes a collar 41 for abutting against a third surface 36 of the second flange 17. Advantageously, a countersunk hole 42 coaxial with the orifice 35 is formed in the third surface 36 of the second flange 17. In this case, the collar 41 abuts against the bottom of the countersunk hole 42. A second support surface 32 extends radially inward from the countersunk hole 42 onto the third surface 36. The attachment device 15 also includes a fastening member 43 mounted on the threaded rod 39 to attach and secure the first flange 16 and the second flange 17 to each other.

[0076] Advantageously, the threaded rod 39 may be a stud extending between a first end 44a and a second end 44b. The fastening member 43 may be a nut 45, each nut 45 comprising a body having an internally drilled hole. Internal threads are arranged in the internally drilled hole to mate with the external threads 40 of the threaded rod 39. The first nut 45a has a support surface 45a1 resting on a second surface 19 of the first flange 16, and the second nut 45b has a support surface 45b1 resting on a fourth surface 37 of the second flange 17. Alternatively, the threaded rod 39 may be in the form of a screw with a head at one end, and the fastening member 43 may include a nut 45 mounted on the other (free) end of the screw.

[0077] Figures 7 to 10 Another embodiment of the sealing device 14 and attachment device 15 of the radial flanges 16, 17 of the first element 2 and the second element 3 is shown. In the following description, elements that are the same as or substantially the same as those described above and / or have the same function are labeled and indicated by the same reference numerals. Figure 7 In this embodiment, the first element 2 includes a first radial flange 16, and the second element 3 includes a second radial flange 17. These flanges extend radially inward. The first flange 16 includes a plurality of through holes 33, and the second flange 17 includes a plurality of through apertures 35. The through apertures and through holes are coaxial. In this embodiment, the assembly is equipped with a sealing device 14 held on the flanges and an attachment device 15 configured to optimally hold the sealing device in place and securely retain it on the first radial flange 16 and the second radial flange 17.

[0078] exist Figure 7 and Figure 8 In this device, the sealing device 14 includes an annular shroud 46 (360°) mounted around the periphery of the flanges 16 and 17. The shroud 46 has an axis D coaxial with the longitudinal axis X. The shroud 46 has sections that at least partially cover the free ends 25a and 25b of the first and second radial flanges. The shroud 46 is generally U-shaped. Specifically, the shroud 46 includes a longitudinal section 47 (forming the bottom of the U-shape) and two branches (referred to as the first branch 48a and the second branch 48b) extending from one end of the longitudinal section 47, respectively. The two branches 48a and 48b are opposite to each other and each is defined in a plane substantially perpendicular to the axis D of the shroud 46. The shroud 46 includes annular support regions 49a and 49b for abutting against the radial flanges 16 and 17.

[0079] from Figure 7 As can be seen, the first branch 48a of the shield includes a first annular support region 49a, which rests on the second surface 19 of the first flange 16. Similarly, the second branch 48b of the shield includes a second annular support region 49b, which rests on the fourth surface 37 of the second flange 17. The support region or radial branch has a predetermined radial height. Advantageously, this predetermined radial height is between one-third of the height of the radial flange and the total height of the radial flange. The shield 46 functions as a cover by covering the radial flanges 16, 17 and thereby covering any possible gap I between the flanges 16, 17.

[0080] The sealing device 14 is made of metal. The shield 46 can be made of steel and metal plate 27. The supports 48a and 48b of the shield 46 can be flexible to facilitate the placement of the shield 46 around the flanges 16 and 17 and the retention of the supports 48a and 48b on the flanges 16 and 17. In this way, the flow of fluid through the flanges 16 and 17 and the teeth 6 / complementary teeth 9 of the first rotor element 2 and the second rotor element 3 is impeded.

[0081] Reference Figure 8Each of the first branches 48a and second branches 48b of the shield includes a plurality of perforations 50 extending laterally through their walls. The perforations 50 are evenly distributed around the axis D of the shield. The perforations 50 of the first branches are arranged opposite to the perforations 50 of the second branches. A threaded rod 39 of the attachment device 15 is used to pass through the perforations 50 of the first branches 48a and second branches 48b of the annular shield 46. Here, the perforations 50 are circular. Of course, these perforations can have other shapes, as long as they allow the threaded rod to pass through.

[0082] Fastening members 43 are arranged on both sides of radial flanges 16, 17. Here, the support surface 45a1 of the first nut 45 contacts the first wall 55 of the first branch. The first wall 55 of the branch opposes the second wall of the branch facing the interior of the cover. The second surface 19 and the fourth surface 37 define the support area of ​​the cover 46. In this embodiment, the threaded rod 39 is a screw including a head. The fastening member 43 includes a nut 45 for mounting on the distal end of the screw.

[0083] exist Figures 8 to 10 In this embodiment, the shield 46 includes a plurality of annular sectors 46a, 46b, 46c, and 46n. In this example, there are eight annular sectors. Each annular sector extends along a circumferential length between two circumferential ends (referred to as the first circumferential end 51a and the second circumferential end 51b). The circumferential ends 51a and 51b define an opening 52 (or air gap) that opens into the sector. The circumferential length corresponds to an angular segment between 25° and 50°. Each annular sector 46a, 46b, 46c, and 46n of the shield 46 includes a generally U-shaped cross-section.

[0084] Reference Figure 9 Each annular sector is nested within an adjacent annular sector along the circumferential direction. Specifically, the first circumferential end 51a of annular sector 46a includes an edge 53 that widens outwards into an opening and a wall. The edge 53 extends circumferentially but also laterally. The second end 51b of the adjacent annular sector 46b is used to engage within the edge 53 of annular sector 46a, such that the edge 53 surrounds annular sector 46a.

[0085] The method for installing turbine engine components, as described above, will now be described. The main steps of this method are as follows: Figure 11 As shown. The method includes the following steps:

[0086] - Step 110: Provide a sealing device, and

[0087] - Step 120: Place the sealing device 14 at the first radial flange 16 and the second radial flange 17 to block fluid from flowing through the toothed connector.

[0088] The method further includes step 130: providing attachment device 15, and step 140: mounting attachment device 15 onto first radial flange 16 and second radial flange 17 to retain sealing device 14 together with first radial flange and second radial flange. Step 130 may be performed simultaneously with step 110 or after step 120.

[0089] The sealing device 14 and the attachment device 15 are separate components. These components were previously manufactured using different production methods.

[0090] exist Figures 2 to 7 In the illustrated embodiment, step 120 of placing the sealing device 14 includes sub-step 121: placing the sealing device 14 (metal plate 27) in the groove 20 of the first flange 16. In the case of the metal plate 27, once the metal plate 27 is in place, the second base plate 29b of the metal plate 27 is located outside the groove 20. The top 20 contacts the first wall 22 of the flange 16, the extreme point of the first base plate 29a contacts the second wall 23 of the flange 16, and a section of the first base plate 29a also rests on the curved support surface 31.

[0091] Step 140 of installing the attachment device 15 includes sub-step 141: inserting the threaded rod 39 into the hole 35 of the second flange 17, such as... Figure 5 As shown. In this step, the threaded rod 39 (in this case, a stud) is inserted from the third surface 36 and along arrow F into the through-hole of the second flange 17. The rod 39 is inserted until the collar 41 abuts against the bottom of the third surface 36 or the countersunk hole 42. The second end 44b of the stud extends on one side of the surface 37 of the second flange 17. Step 140 also includes a sub-step 142: fastening the threaded rod 39 to the second flange 17. For this purpose, the second nut 45b is screwed onto the external thread 40 of the threaded rod 39, specifically from the second end 44b of the threaded rod 39, until the support surface 45b1 of the second nut 45b rests on the fourth surface 37 of the second flange 17. The threaded rod 39 is then secured to the second flange.

[0092] Step 140 includes sub-step 143: inserting a threaded rod 39 mounted on the second flange 17 into the hole 33 of the first flange 16, such that the second flange faces the groove 20. The threaded rod 39 is inserted on one side of the first surface 18 of the first flange 16. After insertion, the first end 44a of the rod 39 extends from the second surface 19 of the first flange 16, and the third surface 36 of the second flange 17 faces the first surface 18 of the first flange 16.

[0093] Step 140 includes sub-step 144: fastening the threaded rod to at least the first flange 16. For this purpose, a first nut 45a is screwed onto the external thread of the threaded rod, and specifically onto the first end 44a of the threaded rod. The first nut 45a is tightened until its supporting surface 45a1 rests on the second surface 19 of the first flange 16. During tightening / fastening, the first flange 16 moves toward the second flange 17. In this way, the first and second flanges are secured to each other. Similarly, the second flange 17 closes the groove 20 to capture and compress the metal plate 27 within the groove 20. Furthermore, the flat surface of the protrusion 38 abuts against the flat surface of the rib 26 to create a flat support connection. A section of the second base plate 29b also abuts against the curved supporting surface 32 of the second flange 17. It can be seen that the base plate 29a overlaps radially outward with the flat support connection between the flanges 16 and 17. Similarly, the groove 20 is formed at the free end 25b of the flange by the flange segment 17a (see... Figure 3 The sealing device 14 and the attachment device 15 are securely held together on the radial flanges 16 and 17. The height h3 of the flange section 17a is at least equal to the height h2 of the groove 20. The height h3 is measured between the plane of the surface of the free end and the parallel plane passing through the protrusion 38.

[0094] exist Figures 8 to 10 In the illustrated embodiment, step 120 of placing the sealing device 14 includes sub-step 122: placing the sealing device 14 around the first radial flange 16 and the second radial flange 17 to cover at least the free ends 25a, 25b of the radial flanges 16, 17. This sub-step 122 specifically includes: engaging or nesting each second circumferential end 51b of the annular sectors 46a, 46b, 46n of the shield along the circumferential direction within the widened edge 53 of the first circumferential end 51a of the adjacent annular sector. The second end 51b of each annular sector slides circumferentially within the edge 53 and subsequently abuts against the bottom wall 54 of the edge 53. The wall or support area of ​​each annular sector has a continuous surface. To install the last annular sector of the shield 46, the annular sector is rotated (slightly) tangentially to further expand the empty space for receiving the last annular sector. For this purpose, all circumferential ends 51a, 51b must abut against the bottom wall 54 of the corresponding edge 53. Next, the last annular sector slides such that the second circumferential end 51b of the last annular sector slides within the edge 53 of the adjacent annular sector, and the edge 53 of the last annular sector itself overlaps radially with the second circumferential end 51b of another adjacent annular sector at its opposite first end. Subsequently, the complete annular shield 46 is arranged around the flanges 16, 17, the free ends of the flanges 16, 17 facing the longitudinal section 47 of the shield 46.

[0095] Step 140 of installing the attachment 15 includes the sub-step of inserting a threaded rod into the slot 50 through the hole 33 and the orifice 35. In this step, the threaded rod (in this case, a screw) is inserted from the wall 55 into the slot 50 of the second branch 48b. The rod 39 is inserted until the supporting surface of the screw head rests against the outer wall 55 of the second branch 48b. After insertion, the distal end of the screw extends from the wall of the first branch of the cover 46.

[0096] Step 140 includes a tightening sub-step: tightening the screws on the flanges. For this purpose, the second nut 45 is tightened onto the external threads of the screws, particularly on one side of the distal end. The second nut is tightened until its supporting surface 45a1 rests against the outer wall 55 of the first support 48a of the shield. During tightening / fastening, the supporting regions 49a, 49b of the shield approach the second surface 19 and the fourth surface 37 of the flanges 16, 17 to perform a seal. The first and second flanges are also secured to each other. The sealing device and the attachment device are firmly held together on the radial flanges.

[0097] Alternatively, step 140 may include sub-steps 141 to 144 for attaching and retaining the sealing device 14 and the attachment device 15 together on the flanges 16, 17.

Claims

1. A turbine engine assembly (1) comprising a first rotor element (2) and a second rotor element (3), the first rotor element and the second rotor element extending about a longitudinal axis (X) and coupled to each other by a toothed coupling (4) to enable torque transmission between the first rotor element (2) and the second rotor element (3), the first rotor element (2) and the second rotor element (3) respectively comprising a first radial flange (16) and a second radial flange (17), the first radial flange and the second radial flange being annular and arranged opposite to each other, the first radial flange (16) and the second radial flange (17) each being attached together by an attachment means (15). Its features are, The first rotor element (2) includes teeth (6), and the second rotor element (3) includes complementary teeth (9), the teeth (6) and the complementary teeth (9) extending along the longitudinal axis forming the toothed coupling, and the turbine engine assembly includes a sealing device (14) configured to ensure a seal of the toothed coupling (4) at the first radial flange (16) and the second radial flange (17).

2. The turbine engine assembly (1) according to claim 1, characterized in that, The attachment device (15) is configured to securely hold the sealing device (14) together with the first radial flange (16) and the second radial flange (17).

3. The turbine engine assembly (1) according to claim 1 or 2, characterized in that, The first radial flange (16) and the second radial flange (17) each extend radially toward the interior of the toothed connector (4).

4. The turbine engine assembly (1) according to claim 1 or 2, characterized in that, The first radial flange (16) includes a groove (20) opening to a first surface (18) of the first radial flange, and the sealing device (14) is for being at least partially accommodated within the groove (20).

5. The turbine engine assembly (1) according to claim 1 or 2, characterized in that, The sealing device (14) includes an annular corrugated metal plate (27).

6. The turbine engine assembly (1) according to claim 1 or 2, characterized in that, The sealing device (14) includes an annular shield (46) for at least partially covering the free end (25a) of the first radial flange (16) and the free end (25b) of the second radial flange (17).

7. The turbine engine assembly (1) according to claim 6, characterized in that, The annular shield (46) is generally U-shaped and includes a longitudinal section (47), a first branch (48a), and a second branch (48b).

8. The turbine engine assembly (1) according to claim 6, characterized in that, The annular shield (46) includes multiple annular sectors (46a, 46b, 46c, 46n), each of which extends along the circumferential direction.

9. The turbine engine assembly (1) according to claim 1 or 2, characterized in that, The attachment device (15) includes a threaded rod (39) for passing through at least one hole (33) through the first radial flange (16) and an opening (35) through the second radial flange (17). The attachment device (15) also includes a fastening member (43) for mounting on the threaded rod (39) to secure the threaded rod to at least one of the first radial flange (16) and the second radial flange (17).

10. The turbine engine assembly (1) according to claim 7, characterized in that, The attachment device (15) includes a threaded rod (39) for passing through at least one hole (33) through the first radial flange (16) and an opening (35) through the second radial flange (17). The attachment device (15) also includes a fastening member (43) for mounting on the threaded rod (39) to secure the threaded rod to at least one of the first radial flange (16) and the second radial flange (17). The first branch (48a) and the second branch (48b) include a plurality of slots (50) through which the threaded rod (39) passes, and the first branch (48a) and the second branch (48b) include support regions (49a, 49b) respectively resting on the second surfaces (19; 37) of the first radial flange (16) and the second radial flange (17).

11. An aircraft turbine engine comprising at least one turbine engine assembly (1) according to any one of claims 1 to 10.

12. A method for installing a turbine engine assembly (1) according to any one of claims 1 to 10, characterized in that, The installation method includes: - The step (110) of providing the sealing device (14), and - The step (120) of placing the sealing device (14) at the first radial flange (16) and the second radial flange (17) to block fluid flow through the toothed connector (4).

13. The installation method according to claim 12, characterized in that, The installation method includes: - The step (130) of providing the attachment device (15): and - The step (140) of attaching the attachment device (15) to the first radial flange (16) and the second radial flange (17) to securely hold the sealing device (14) together with the first radial flange (16) and the second radial flange (17).

14. The installation method according to any one of claims 12 and 13, characterized in that, The step (120) of placing the sealing device (14) at the first radial flange (16) and the second radial flange (17) includes the sub-step (121): placing the sealing device (14) in the groove (20) of the first radial flange (16).

15. The installation method according to any one of claims 12 and 13, characterized in that, The step (120) of placing the sealing device (14) at the first radial flange (16) and the second radial flange (17) includes a sub-step (122): placing the sealing device (14) around the first radial flange (16) and the second radial flange (17) to at least cover the free end (25a) of the first radial flange and the free end (25b) of the second radial flange (17).

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