FR3085416A1 - OUTPUT DIRECTIVE BLADE RECOMPOSING A PLATFORM AND A CRANKCASE INTERMEDIATE - Google Patents

Abstract

The invention describes an outlet guide vane (1) for a fan module of a turbomachine, comprising: - a blade (10), - a platform (20) extending transversely with respect to the blade (10) and connected to a head (12) of the blade (10), - an upstream flange (31) and a downstream flange (32) extending radially with respect to the platform (20), the upstream (31) and downstream flanges ( 32) being connected to the platform (20) and being configured to be fixed to an outer ring of the turbomachine, the outlet guide vane (1) being characterized in that the blade (10), the platform (20), the upstream flange (31) and the downstream flange (32) are monolithic. The invention also relates to a stator wheel (2) and to a blower module comprising such a blade (1).

Description

FIELD OF THE INVENTION

The present invention relates to an outlet guide vane for a turbomachine reconstituting a platform and an intermediate casing shell. The invention also relates to a fan rectifier wheel and a fan module of a turbomachine comprising at least one such blade.

TECHNOLOGICAL BACKGROUND

A turbofan generally comprises, from upstream to downstream in the direction of flow of the gases, a blower streamlined and housed in a blower casing, a primary flow stream and a secondary flow stream. The mass of air sucked in by the blower is therefore divided into a primary flow, which circulates in the primary flow vein, and in a secondary flow, which is concentric with the primary flow and circulates in the secondary flow vein.

A turbojet engine can be fitted with a stator wheel in the secondary stream, consisting of outlet guide vanes (or OGV, acronym for Outlet Guide Vane). The assembly comprising the fan, the stator wheel consisting of the outlet guide vanes and the fan casing is called the fan module.

The outlet guide vanes are located downstream of the fan blades relative to the direction of an air flow in the turbomachine. They aim both to straighten the flow of cold air coming from the fan blades, as well as to ensure the transmission of part of the mechanical forces (engine suspension, thrust, aerodynamic moment ...) from an internal crown from the turbomachine to an outer ring.

The blades of the outlet guide vanes can be made of composite material, in order to limit their mass.

In order to limit the disturbances in the flow of the secondary flow due to the attachment of the blade, it is possible to make platforms to be attached to each blade. In particular, a platform can be added at the level of a head of the blade so that, when the outlet guide vanes are angularly arranged between an internal crown and an external crown to form a rectifier wheel, reconstitute a secondary vein so as to ensure good flow quality.

An example of an outlet guide vane comprising a platform intended to reconstitute a secondary flow stream when the vanes are angularly arranged to form a rectifier wheel is described in document WO 2014/164483.

In known manner, as illustrated in FIG. 1a, a blade 100 of the outlet guide vane is fixed to a platform 200, which is fixed to an intermediate casing shell 500. The intermediate casing shell 500 is itself fixed to an upstream fixing face 300 and a downstream fixing face 400 of the outer ring.

Such fixing of the outlet guide vane to the intermediate casing shell itself fixed to the outer ring generates a mass, complexity, size and cost of the turbomachine commensurate with the number of parts to be fixed, mount or dismantle during initial assembly or maintenance operations performed on the turbomachine.

SUMMARY OF THE INVENTION

An object of the invention is to provide a solution allowing a more advantageous attachment of an outlet guide vane to an outer ring of a turbomachine compared to the prior art.

In particular, an object of the invention is to provide an outlet guide vane which can be fixed to an outer ring more easily than in the prior art and for a reduced mass.

Another object of the invention is to propose an outlet guide vane which limits the disturbances of the flow due to the fixing of the vane to the outer ring of the turbomachine.

According to a first aspect, the invention relates to an outlet guide vane for a fan module of a turbomachine, comprising:

a blade extending along a radial axis, the radial axis extending in a direction perpendicular to an axis of central symmetry of the fan module and passing through it, the blade having a head,

a platform extending transversely with respect to the blade, the platform being connected to the head of the blade and comprising an upstream edge and a downstream edge,

- an upstream flange and a downstream flange extending radially with respect to the platform, the upstream flange and the downstream flange being connected respectively to the upstream edge and the downstream edge of the platform, the upstream and downstream flanges being configured to be fixed to an outer ring of the turbomachine, the outlet guide vane being characterized in that the blade, the platform, the upstream flange and the downstream flange are monolithic.

Some preferred but non-limiting characteristics of the blade described above are the following, taken individually or in combination:

- The blade is made of composite material comprising a fibrous reinforcement densified by a matrix.

- The platform comprises a plate extending on either side of a stiffening rib, the thickness of the stiffening rib being greater than that of the plate, and recesses are formed in the stiffening rib.

- The blade further comprises a foot, the outlet guide blade further comprises a second platform connected to the foot of the blade and a blade mounting flange on an inner ring of the turbomachine, the second platform, the flange fixing and the blade being monolithic.

The platform further comprises a first lateral edge and a second lateral edge, extending between the upstream edge and the downstream edge, a notch being formed in one of the first lateral edge and the second lateral edge, and a protrusion of complementary shape and size being formed in the other of the first lateral edge and the second lateral edge, the notch and the protrusion being configured to cooperate with a protrusion and a notch of adjacent outlet guide vane platforms .

- The platform further comprises a first lateral edge and a second lateral edge, extending between the upstream edge and the downstream edge, the first lateral edge and the second lateral edge being thinner than the rest of the platform so forming a shoulder, said shoulder being configured to set up the platform of an adjacent outlet guide vane.

- The platform further comprises a first tangential flange and a second tangential flange, extending between the upstream flange and the downstream flange and configured to fix the platform to an adjacent outlet guide vane platform.

According to a second aspect, the invention relates to a stator wheel comprising at least one outlet guide vane according to the first aspect.

The stator wheel can comprise several outlet guide vanes according to the first aspect, the outlet guide vanes being positioned and / or fixed via their platforms.

According to a third aspect, the invention relates to a fan module of a turbomachine, comprising:

a stator wheel according to the second aspect, the stator wheel comprising at least one outlet guide vane according to the first aspect,

an outer ring having an upstream fixing face located upstream of the outlet guide vane and a downstream attachment face located downstream of the outlet guide vane, characterized in that, for each outlet guide vane, the upstream flange is fixed on the upstream fixing face of the outer ring, and the downstream flange is fixed on the downstream fixing face of the outer ring.

PRESENTATION OF THE FIGURES

Other aspects, aims and advantages of the present invention will appear on reading the detailed description which follows, given by way of nonlimiting example, which will be illustrated by the following figures:

- Figure la, already discussed, is a diagram showing a fixing of an outlet guide vane to an outer ring according to the prior art.

- Figure lb is a diagram showing an attachment of an outlet guide vane to an outer ring according to an embodiment of the invention.

- Figure 2 is a diagram showing an output guide vane according to an embodiment of the invention.

- Figure 3 is a diagram showing a foot of an outlet guide vane according to an embodiment of the invention.

- Figures 4a, 4b and 4c are diagrams showing output guide vanes according to different embodiments of the invention.

- Figures 5a and 5b are diagrams showing outlet guide vanes according to two embodiments of the invention.

- Figure 6 is a diagram showing a stator wheel having output guide vanes according to one embodiment of the invention.

DETAILED DESCRIPTION OF AN EMBODIMENT

In the present application, the upstream and downstream are defined with respect to the normal direction of flow of the gas in the blower through the turbomachine. In addition, the longitudinal axis is the axis of central symmetry of the fan. The longitudinal direction corresponds to the direction of the longitudinal axis, a radial direction is a direction perpendicular to this axis and passing through it, and a transverse direction is a direction perpendicular to the longitudinal axis and not passing through it. Unless otherwise specified, the terms internal and external, respectively, are used with reference to a radial direction so that the part or the internal face of an element is closer to the longitudinal axis than the part or the external face of the same element.

The turbomachine comprises an internal ring and an external ring. The inner and outer rings respectively delimit inside and outside a gaseous flow stream of secondary flow in the turbomachine. The internal and external rings can each have an upstream fixing face 3, located upstream of the outlet guide vane 1, and a downstream fixing face 4, located downstream of the outlet guide vane 1. The faces of fixing upstream 3 and downstream 4 extend mainly in the radial and transverse directions.

An outlet guide vane 1, illustrated by way of nonlimiting example in FIG. 2, is intended to be positioned downstream of the blower. The output guide vane 1 includes:

a blade 10 extending along a radial axis, the radial axis extending in a direction perpendicular to an axis of central symmetry of the fan module and passing through it, the blade 10 having a head 12,

a platform 20 extending transversely with respect to the blade 10, the platform being connected to the head 12 of the blade 10 and comprising an upstream edge 21 and a downstream edge 22,

an upstream flange 31 and a downstream flange 32 extending radially relative to the platform 20, the upstream flange 31 and the downstream flange 32 being connected respectively to the upstream edge 21 and to the downstream edge 22 of the platform 20 , the upstream 31 and downstream 32 flanges being configured to be fixed to an outer ring of the turbomachine.

The blade 10, the platform 20, the upstream flange 31 and the downstream flange 32 are monolithic.

A monolithic platform 20 with the blade 10, the upstream flange 31 and the downstream flange 32 makes it possible to reduce the number of parts of the outlet guide vane 1 compared to a vane comprising a blade which would be attached and fixed to a platform, itself fixed on an intermediate casing shell, itself fixed on the outer ring. The complexity and the cost of such an outlet guide vane 1 having a blade 10, a platform 20, an upstream flange 31 and a monolithic downstream flange 32 are therefore reduced. Similarly, the operations requiring the mounting and dismounting of the blade 1 on the outer ring, such as the assembly of the blade 1 on the outer ring and the associated maintenance operations, are facilitated.

The blade 10 of the outlet guide vane 1 has a lower surface and an upper wall. The intrados and extrados walls of the blade 10 define a profile having dimensions adapted to straighten the flow of cold air downstream of the fan blades, as well as to ensure the transmission of part of the mechanical forces from the internal crown to the outer crown.

The blade 10 can be metallic, for example made of materials such as aluminum or titanium. The blade 10 can alternatively be made of composite material comprising a fibrous reinforcement densified by a matrix and extending along the radial axis, which makes it possible to reduce its mass. The fibrous reinforcement may in particular comprise fibers of carbon, glass, aramid and / or ceramic. As for the matrix, it is typically a polymer matrix, for example epoxide, bismaleimide or polyimide. Such a blade 10 made of composite material offers a lower mass than the same blade 10 which would be made of metal.

The foot 11 of the blade 10 corresponds to the part of the blade 10 located near its internal radial end, and the head 12 of the blade corresponds to the part of the blade 10 located near its external radial end.

The platform 20 extends transversely relative to the blade 10. The platform 20 is connected to the head 12 of the blade 10, which improves the flow quality by limiting the disturbances due to the attachment of the blade 10 at the outer crown.

The platform 20 has an internal surface, oriented towards the flow of gases, and an external surface, opposite the internal surface. The upstream edge 21 of the platform 20 delimits the upstream end, and the downstream edge 22 delimits the downstream end. The upstream 21 and downstream 22 edges are preferably oriented in the transverse direction.

The platform 20 can extend on either side of the lower and upper surfaces of the blade 10 and have dimensions and shapes suitable for, when several outlet guide vanes 1 are angularly arranged to form a stator wheel 2, reconstruct a substantially cylindrical secondary flow vein. Thus, the flow disturbances due to the fixing of the blade 1 on the outer ring are limited and the efficiency of the turbomachine is optimized.

The platform 20 may comprise a first lateral edge 23 and a second lateral edge 24, extending in the longitudinal direction between the upstream edge 21 and the downstream edge 22.

Recesses 25 can be formed in the platform 20. These recesses 25 make it possible to reduce the mass of the platform 20, therefore of the outlet guide vane 1. The recesses 25 can be oriented along the radial axis. The recesses 25 can pass through the platform 20 from its external surface to its internal surface and open into the external radial end of the blade 10. The recesses 25 can be formed only in the upstream part of the platform 20, or at the both in its upstream part and in its downstream part. The number of recesses 25 formed in the upstream part of the platform 20 can be the same or be different from the number of recesses 25 formed in its downstream part. The recesses 25 can be spaced regularly or irregularly, and have similar or different shapes. In the embodiment illustrated in Figure 2, the recesses 25 are five in number, are formed in the upstream part of the platform 20, and have different dimensions from each other.

The external surface of the platform 20 may not be smooth. In particular, the platform 20 may comprise a substantially flat plate extending on either side of a stiffening rib 26. Preferably, the stiffening rib 26 has a thickness greater than that of the plate, and recesses are formed in the stiffening rib 26. The stiffening rib 26 may be located in line with the blade 10 in the radial direction, and have dimensions and a shape corresponding to those of the head 12 of the blade 10, these dimensions possibly being variables along the longitudinal axis. Preferably, the recesses 25 pass through the stiffening rib 26 from its external surface to its internal surface, and can extend into the head of the blade 10.

Such a platform 20 comprising a plate and a stiffening rib 26 in which recesses are formed 25 makes it possible to minimize the thickness of the plate, therefore the amount of material used to make the platform 20, therefore the mass of the guide vane output 1, while ensuring the transition of forces in dawn 1.

As indicated above, the upstream flanges 31 and downstream 32 are respectively connected to the upstream 21 and downstream edges 22 of the platform 20. The upstream flanges 31 and downstream 32 can have similar dimensions and extend in the radial direction. Preferably, the upstream 31 and downstream 32 flanges extend over the entire length of the platform 20. As a variant, they may have different dimensions, or extend only over part of the length of the platform 20.

The upstream flange 31 can be configured to come opposite an upstream fixing face 3 of the outer ring, for example of a face of a fan casing. The downstream flange 32 can be configured to come opposite a downstream fixing face 4 of the outer ring.

Advantageously, one or more holes are formed in each of the upstream 3 and downstream 4 fixing faces of the outer ring. The holes in the fixing faces 3, 4 can be oriented along the longitudinal axis, and can be configured to each receive a fixing screw.

One or more holes 35 can be formed in each of the upstream 31 and downstream 32 flanges. The holes 35 of the flanges 31, 32 can be oriented along the longitudinal axis, and configured to each receive a fixing screw.

The holes 35 of the flanges 31, 32 are advantageously formed opposite the holes of the upstream 3 and downstream 4 fixing faces of the outer ring when the outlet guide vane 1 is in position in the turbomachine. Thus, fixing screws can be inserted into each of the pairs formed by a hole 35 in the ferrule 31, 32 and a hole in the fixing face 3, 4. The upstream flanges 31 and downstream 32 are then fixed to the upstream fixing faces 3 and downstream 4 of the outer ring, for example by screwing, bolting, or any other possible fixing means. Such a fastening allows rapid assembly and disassembly of these two parts relative to each other. In the example illustrated in FIG. 2, there are three holes per ferrule 31, 32 and per fixing face 3, 4, and are spaced regularly.

Alternatively, the holes could be more numerous, a single hole could be formed in a flange 31, 32 and a fixing face 3, 4, the number of holes in the fixing face 3, 4 could be different from the number of holes 35 flange 31, 32, the number of holes 35 in the upstream flange 31 could be different from the number of holes 35 in the downstream flange 32, or the holes 35 could be spaced irregularly. Alternatively, no bore 35 may be formed in the upstream 31 and downstream flanges 32, the upstream 31 and downstream 32 flanges can then be welded respectively to the upstream 3 and downstream 4 fixing faces of the outer ring.

As indicated above and as illustrated in FIGS. 1b, 2, and 4a to 4c, the blade 10, the upstream flange 31, the platform 20 and the downstream flange 32 are monolithic. By monolithic, it will be understood here that the blade 10, the upstream flange 31, the platform 20 and the downstream flange 32 are formed integrally and in one piece, here made of metal. They are therefore in one piece. For example, they may have come together from a foundry. The outlet guide vane 1 then reconstitutes both the secondary flow stream via the platform 20, and the intermediate casing shell via the upstream 31 and downstream 32 flanges. outlet 1 thus guarantees a satisfactory flow quality, and is fixed to the external crown without requiring any additional part.

Such an arrangement makes it possible to reduce the number of parts necessary for fixing the outlet guide vane 1 to the outer ring, and therefore to reduce the complexity, the mass and the cost of the engine, and to simplify assembly and disassembly. of the exit guide dawn 1.

The outlet guide vane 1 may further comprise a second platform connected to the foot 11 of the blade 10. The second platform extends transversely relative to the blade 10 near its foot 11. The second platform can be monolithic with the blade 10. Thus, the number of parts required for fixing the outlet guide vane 1 to the internal ring is reduced.

The second platform can extend on either side of the lower and upper surfaces of the blade 10. The second platform can have dimensions and shapes similar to those of the first platform 20 and suitable for, when several guide vanes of outlet 1 are angularly arranged to form a rectifier wheel 2, to reconstitute a substantially cylindrical secondary flow stream.

The output guide vane 1 may also have a mounting flange 50 for the blade 10 on the inner ring, illustrated in FIG. 3. The second platform is then located in a radially more external position on the blade 10 than the mounting flange 50, and may be in contact with it. Thus, the disturbances in the flow due to the attachment of the blade 10 to the internal ring are limited.

The fixing flange 50 may have an upstream fixing part and a downstream fixing part. The upstream fixing part may have two screws 51 extending along the radial axis, the screws 51 being intended to cooperate with two housings of the internal ring, to ensure the positioning of the outlet guide vane 1. The downstream fixing part may have one or more holes 55 adapted to each receive a fixing screw. The holes 55 of the downstream fixing part are intended to come opposite holes formed in a fixing face of the internal ring. Thus, the fixing flange 50 can be fixed to the internal crown by fixing screws, metal inserts, bolts or any other possible fixing means. Such a fastening allows rapid assembly and disassembly of these two parts relative to each other.

The blade 10, the second platform and the fixing flange 50 can be monolithic. Such an arrangement makes it possible to reduce the number of parts necessary for fixing the outlet guide vane 1 to the internal ring, and thus to reduce the complexity, the mass and the cost of the engine, and to simplify assembly and disassembly. of the exit guide dawn 1.

One or more outlet guide vanes 1 according to one of the embodiments described above can be integrated within a stator wheel 2. The vanes 1 forming the stator wheel 2 can have different profiles and dimensions.

In the case of a stator wheel 2 comprising several outlet guide vanes 1 according to one of the embodiments described above, the vanes 1 can be put in place and / or fixed via their platforms according to different embodiments .

According to a first embodiment, illustrated in FIGS. 2 and 4a, a notch 61 is formed in one of the first lateral edge 23 and the second lateral edge 24 of the platform 20. The notch 61 may for example be in the form semicircle, and be located substantially equidistant in the longitudinal direction of the upstream edge 21 and the downstream edge 22 of the platform 20. A projection 62 of complementary shape and size of the notch 61 can be formed in the other, among the first lateral edge 23 and the second lateral edge 24 of the platform 20. The notch 61 and the projection 62 are configured to cooperate with a projection 62 and a notch 61 of platforms 20 of outlet guide vanes 1 adjacent. As a variant, the notch 61 may have a triangular, rectangular, flared shape, or any other conceivable shape. Also, the lateral edges 23, 24 may have several notches 61 and several corresponding projections 62.

According to a second embodiment, illustrated in FIG. 4b, the first lateral edge 23 and the second lateral edge 24 of the platform 20 are thinner than the rest of the platform 20 so as to form a shoulder 63. The shoulder 63 is configured to set up the platform 20 of an adjacent outlet guide vane 1. Two neighboring vanes 1 can then be put in place, for example by curling, as illustrated in FIG. 5a. In this case, the first and second lateral edges 23, 24 of an outlet guide vane 1 are refined at their internal part, and the first and second lateral edges 23, 24 of an adjacent outlet guide vane 1 are refined at the level of their external part. Thus, the lateral edges 23, 24 of the two neighboring vanes 1 fit together. Two adjacent outlet guide vanes 1 can also be staggered, as illustrated in FIG. 5b. In this case, a lateral edge 23, 24 of a blade 1 is refined at its internal part, and the other lateral edge 23, 24 is refined at its external part. The outlet guide vanes 1 are arranged so that the lateral edges 23, 24 of two adjacent vanes 1 fit together. The lateral edges 23, 24 can be refined over their entire length. Alternatively, the side edges 23, 24 can be refined over only part of their length, or at various places along their length.

The first and second embodiments allow two adjacent outlet guide vanes 1 to be positioned by centering, without adding material or complexity to the system. Thus, the blades 1 can be easily put in place, assembled and disassembled. Furthermore, such an arrangement makes it possible to ensure a good transition of forces between two adjacent blades 1, which is particularly important in the case of composite blades, and increases the lifetime of the blades 1.

According to a third embodiment, illustrated in FIG. 4c, the platform 20 further comprises a first tangential flange 64 and a second tangential flange 65. The first and second tangential flanges 64, 65 may extend between the upstream flanges 31 and downstream 32. The first and second tangential flanges 64, 65 can have dimensions in the radial direction similar to those of the upstream 31 and downstream flanges 32. The first and second tangential flanges 64, 65 can be connected respectively to the first and second lateral edges 23 , 24 of the platform 20, and be monolithic with said lateral edges 23, 24. The tangential flanges 64, 65 are configured to fix the platform 20 of the outlet guide vane 1 to a platform 20 of an adjacent vane 1. In particular, holes 66 can be formed in each of the first and second tangential flanges 64, 65. The holes 66 can be oriented in the transverse direction, and be configured to each receive a fixing screw. The holes 66 of tangential flanges 64, 65 of an outlet guide vane 1 are advantageously formed opposite the holes 66 of tangential flanges 64, 65 of a neighboring vane 1 when the vanes 1 are in position in the turbomachine. Thus, fixing screws can be inserted into each of the pairs formed by a bore 66 of a first tangential flange 64 of an outlet guide vane 1 and a bore 66 of a second tangential flange 65 of an adjacent vane 1 . Two adjacent outlet guide vanes 1 can then be fixed, for example by screwing or bolting. Such fixing allows quick and easy assembly and disassembly of the blades 1 relative to each other. In the example illustrated in FIG. 4c, the holes 66 are three in number by tangential flange 64,

65, and are spaced evenly. Alternatively, the holes 66 could be more or less numerous, or could be spaced irregularly.

A turbomachine fan module may comprise a stator wheel 2 according to one of the embodiments described above, the stator wheel 2 comprising at least one outlet guide vane 1 according to one of the embodiments described above above, the upstream flange 31 of each outlet guide vane 1 being fixed on the upstream fixing face 10 3 of the outer ring, and the downstream flange 32 of each outlet guide vane 1 being fixed on the downstream fixing face 4 of the outer crown.

Other embodiments can be envisaged and a person skilled in the art can easily modify the embodiments or examples described above or envisage others while remaining within the scope of the invention.

Claims (10)

1. Exit guide vane (1) for a fan module of a turbomachine, comprising: - a blade (10) extending along a radial axis, the radial axis extending in a direction perpendicular to an axis of central symmetry of the fan module and passing through it, the blade (10) having a head (12 ), - a platform (20) extending transversely relative to the blade (10), the platform being connected to the head (12) of the blade (10) and comprising an upstream edge (21) and a downstream edge (22) , - an upstream flange (31) and a downstream flange (32) extending radially relative to the platform (20), the upstream flange (31) and the downstream flange (32) being connected respectively to the upstream edge (21 ) and at the downstream edge (22) of the platform (20), the upstream (31) and downstream (32) flanges being configured to be fixed to an outer ring of the turbomachine, the outlet guide vane (1) being characterized in that the blade (10), the platform (20), the upstream flange (31) and the downstream flange (32) are monolithic. 2. outlet guide vane (1) according to claim 1, wherein the blade (10) is made of composite material comprising a fibrous reinforcement densified by a matrix. 3. outlet guide vane (1) according to one of claims 1 or 2, wherein the platform (20) comprises a plate extending on either side of a stiffening rib (26), the thickness of the stiffening rib (26) being greater than that of the plate, and in which recesses (25) are formed in the stiffening rib (26). 4. outlet guide vane (1) according to one of the preceding claims, wherein the blade (10) further comprises a foot (11), the outlet guide vane (1) further comprises a second platform connected to the base (11) of the blade (10) and a fixing flange (50) of the blade (1) on an inner ring of the turbomachine, the second platform, the fixing flange (50) and the blade (10) being monolithic. 5. Exit guide vane (1) according to one of claims 1 to 4, wherein the platform (20) further comprises a first lateral edge (23) and a second lateral edge (24), extending between l upstream edge (21) and downstream edge (22), a notch (61) being formed in one of the first side edge (23) and the second side edge (24), and a projection (62) of complementary shape and size being formed in the other among the first lateral edge (23) and the second lateral edge (24), the notch (61) and the projection (62) being configured to cooperate with a projection (62) and a notch (61) of platforms (20) of adjacent outlet guide vanes (1). 6. outlet guide vane (1) according to one of claims 1 to 4, in which the platform (20) further comprises a first lateral edge (23) and a second lateral edge (24), extending between the upstream edge (21) and downstream edge (22), the first lateral edge (23) and the second lateral edge (24) being thinner than the rest of the platform (20) so as to form a shoulder (63 ), said shoulder (63) being configured to set up the platform (20) of an adjacent outlet guide vane (1). 7. outlet guide vane (1) according to one of claims 1 to 4, in which the platform (20) further comprises a first tangential flange (64) and a second tangential flange (65), extending between the upstream flange (31) and downstream flange (32) and configured to fix the platform (20) to an adjacent outlet guide vane platform (20) (1). 8. stator wheel (2) for a fan module of a turbomachine, said stator wheel (2) comprising at least one outlet guide vane (1) according to one of claims 1 to 7. 9. Rectifier wheel (2) according to claim 8, comprising several outlet guide vanes (1) according to one of claims 1 to 7, the outlet guide vanes (1) being positioned and / or fixed via their platforms (20). 10. Blower module of a turbomachine, comprising: a stator wheel (2) according to one of claims 8 or 9, the stator wheel (2) comprising at least one outlet guide vane (1) according to one of claims 1 to 7, - an outer ring having an upstream attachment face (3) located upstream of the outlet guide vane (1) and a downstream attachment face (4) located downstream of the outlet guide vane (1), characterized in that, for each outlet guide vane (1), the upstream flange (31) is fixed on the upstream fixing face (3) of the outer ring, and the downstream flange (32) is fixed on the fixing face downstream (4) of the outer crown.