• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention proposes a separation spout (22) for low-pressure axial turbine engine compressor for aircraft. The partition spout (22) includes an upstream annular metal wall (36) with a circular leading edge (30), and a downstream annular wall (38) made of an organic matrix and short fiber composite material. The separation spout (22) further supports an outer shell (28) of the upstream rectifier of the compressor. The upstream wall (36) includes an annular anchoring portion (40) disposed in the thickness of the downstream partition (38) to anchor the partition (38) and the wall (36) to each other . The anchoring portion (40) has a distribution of hexagonal holes (42) to increase anchoring. The invention also proposes a method of manufacturing by molding a separation spout (22) bi materials or mixed nozzle.
    公开号:BE1023031B1
    申请号:E2015/5282
    申请日:2015-05-04
    公开日:2016-11-09
    发明作者:David Bouillon；Ghislain Herbaut
    申请人:Techspace Aero S.A.；
    IPC主号:
    专利说明:

    Description
    TURBOMACHINE COMPRESSOR COMPOSITE SEPARATION SPOUT
    AXIALE
    Technical Field The invention relates to an axial turbomachine air inlet. More specifically, the invention relates to an axial turbomachine separation spout. The invention also relates to a method of manufacturing an axial turbomachine separation spout.
    Prior art
    Multi-stream turboprop engines are developed to respect the environment. Respect for the environment is understood here as a limitation of the noise nuisance, just as the reduction of consumption. In order to optimize their thrust and their efficiency while reducing noise pollution, turboprops work with several annular air flows, for example two or three. Generally, a turbomachine separates an incoming flow into a primary flow and a secondary flow; these last two have forms of annular handles. The primary flow borrows the compressors, a combustion chamber, and is then expanded in turbines. The secondary flow bypasses the compressor, the combustion chamber, the turbine; and then regains the primary flow output of the turbojet engine. The flows are separated by a circular separation nozzle placed upstream of the compressor, its geometry limits the entry of air into the compressor.
    A splitter must be robust because it is exposed to ingestions during its operation. It must also allow to support various elements, such as a compressor upstream rectifier, an acoustic panel. It can also house a de-icing system which must maintain and protect the pipes and passages.
    The document EP1801389 A1 discloses a separation spout of a low pressure axial turbine engine compressor. The nozzle comprises an annular metal body forming a mechanical link between an inner ring and an acoustic panel. The separation spout comprises an axial flange conforming to the interior of the acoustic panel for fixing it with screws. However, this method of attachment is not robust due to the addition of screws which involves stress concentrations. Summary of the invention
    TECHNICAL PROBLEM The invention aims to solve at least one of the problems posed by the prior art. More specifically, the invention aims to strengthen the assembly of a splitter. The invention also aims to lighten a separation nozzle.
    Technical solution
    It will be understood that the subject of the invention is a separation spout comprising an optionally composite downstream partition; and an optionally metallic upstream partition, with a circular leading edge and an attachment protrusion in the thickness of the downstream partition. According to another approach, the subject of the invention is a separation spout with two partitions which are outside the leading edge and which are made of two different materials, one of them having an anchoring portion. integrated into each other to bring them together. The invention also relates to a turbomachine separation spout, in particular an axial turbomachine low-pressure compressor, the spout comprising: an upstream annular wall with a circular leading edge, a downstream annular partition, remarkable in that the upstream wall comprises an annular anchoring portion disposed in the thickness of the downstream partition so as to anchor the partition and the wall to one another.
    According to an advantageous embodiment of the invention, the downstream partition comprises an outer annular surface and an inner annular surface, the anchoring portion being at a distance from the outer surface and the inner surface.
    According to an advantageous embodiment of the invention, the anchoring portion comprises at least one anchoring asperity, preferably several anchor asperities distributed over its surface.
    According to an advantageous embodiment of the invention, the anchoring portion comprises at least one anchoring orifice, preferably several anchoring holes traversed by the material of the downstream partition, optionally the orifices are hexagonal.
    According to an advantageous embodiment of the invention, the anchoring portion comprises an interconnected network of junctions, possibly repeating a pattern on the axial majority of the anchoring portion and / or essentially all the way round the separation spout.
    According to an advantageous embodiment of the invention, the materials of the anchoring portion and the downstream partition are intermingled, the anchoring portion being predominantly occupied by the material of the downstream partition.
    According to an advantageous embodiment of the invention, the downstream partition and the upstream wall each comprise outer annular surfaces, said surfaces being in the extension of one another and / or are tangent on the circumference. According to an advantageous embodiment of the invention, the upstream wall comprises an annular reinforcing thickening, the leading edge possibly being formed on the annular thickening.
    According to an advantageous embodiment of the invention, the upstream wall comprises a profile of revolution with a portion delimited by an arc, the anchoring portion extending axially from said arc, the arc and / or the portion possibly extending on the majority of the thickness of the upstream wall.
    According to an advantageous embodiment of the invention, the anchoring portion forms a zone of lesser thickness on the upstream wall, possibly the anchoring portion is delimited upstream by at least one, preferably by at least two annular steps.
    According to an advantageous embodiment of the invention, the separation spout comprises an outer shell surrounded by the downstream partition, preferably the separation spout comprises an annular row of stator vanes supported by the outer shell, the anchoring portion optionally being disposed axially at the blade row, for example to the right of the attack edges of said blades.
    According to an advantageous embodiment of the invention, the upstream wall comprises an annular fixing hook, preferably oriented axially downstream, the outer ring being optionally attached to the annular hook.
    According to an advantageous embodiment of the invention, the downstream partition comprises a composite material with an organic matrix and fibers; the downstream partition possibly being integral.
    According to an advantageous embodiment of the invention, the downstream partition comprises an annular flange extending radially inwards.
    According to an advantageous embodiment of the invention, the downstream partition has a generally constant thickness axially and / or according to the circumference of the separating nozzle.
    According to an advantageous embodiment of the invention, the anchoring portion is disposed in the middle of the outer surface and the inner surface of the downstream partition.
    According to an advantageous embodiment of the invention, the anchoring portion matches the outer surface and the inner surface of the downstream partition.
    According to an advantageous embodiment of the invention, the anchoring portion forms a sheet, in particular a perforated sheet.
    According to an advantageous embodiment of the invention, the anchoring portion comprises an inner annular face and an outer annular face, at least one or each of said faces being covered and / or in contact with the downstream partition.
    According to an advantageous embodiment of the invention, the upstream wall is metallic, in particular titanium or titanium alloy.
    According to an advantageous embodiment of the invention, the annular hook comprises at least one tubular surface, and / or forms an annular recess profiled axially.
    According to an advantageous embodiment of the invention, the separation nozzle comprises an annular cavity delimited on the outside by the downstream partition, and possibly by the outer ferrule on the inner side.
    According to an advantageous embodiment of the invention, the anchoring portion may be discontinuous depending on the circumference of the deicing nose.
    According to an advantageous embodiment of the invention, the downstream partition is full.
    According to an advantageous embodiment of the invention, the anchoring portion has a curved revolution profile.
    According to an advantageous embodiment of the invention, the upstream wall is a junction block between the downstream partition and the outer shell.
    According to an advantageous embodiment of the invention, the anchoring portion is at least generally disposed in the middle of the thickness of the downstream partition.
    According to an advantageous embodiment of the invention, the downstream partition and the upstream wall comprise a smooth external circular junction.
    According to an advantageous embodiment of the invention, the revolution profile of the outer surface of the upstream wall and / or the downstream partition is optionally straight, and / or is generally inclined from 5 ° to 30 ° relative to the axis. of revolution of the splitter.
    According to an advantageous embodiment of the invention, the upstream wall and its anchoring portion are integral and / or integral. The invention also relates to a turbomachine comprising a separation nozzle, which is remarkable in that the separation nozzle is in accordance with the invention, optionally the turbomachine comprises a compressor with an inlet delimited by the separation nozzle.
    According to an advantageous embodiment of the invention, the turbomachine comprises a fan, the separation nozzle surrounding the fan, optionally the upstream wall has a constant thickness and / or is hollow.
    According to an advantageous embodiment of the invention, the turbomachine comprises a nacelle, the separation nozzle being formed on the nacelle. The subject of the invention is also a method for manufacturing an axial turbomachine separation spout, in particular a compressor, the spout comprising: an upstream annular wall with a circular leading edge, a composite downstream annular partition, the method comprising a step (a) providing or manufacturing an upstream annular wall, characterized in that the upstream wall comprises an anchoring portion, and in that the method comprises a step (b) molding a downstream partition on the anchoring portion so as to anchor the upstream wall in the downstream partition via the anchoring portion.
    According to an advantageous embodiment of the invention, step (b) molding comprises the application of an injection mold against the outer annular surface of the upstream wall.
    In general, the advantageous modes of each object of the invention are also applicable to the other objects of the invention. As far as possible, each object of the invention is combinable with other objects.
    Benefits brought
    The separation spout facilitates the creation of a bi-material separating spout, which allows the leading edge reinforcement to be as accurate as possible, and then extends the spout using a composite partition to optimize lightening. Overall, such a turbomachine becomes lighter which reduces the consumption of the corresponding aircraft. The use of several materials simplifies the realization of certain forms. Economical materials can be used depending on the constraints they face. The thickness of the anchoring portion can be reduced to reduce rigidity, which limits the stress concentrations, and avoids the formation of hard spots. Creating a trellis annular zone improves the interface. The downstream partition is connected to the upstream wall by means of an axially extended zone, the grip becomes better. The invention reduces the number of interfaces between the different elements, which simplifies assembly and maintenance.
    Brief description of the drawings
    FIG. 1 represents an axial turbomachine according to the invention.
    FIG. 2 is a diagram of a turbomachine compressor according to the invention.
    Figure 3 illustrates a section of a separation spout according to the invention.
    Figure 4 outlines the upstream wall and its anchoring portion according to the invention.
    Description of the embodiments
    In the following description, the terms inner or inner and outer or outer refer to a positioning relative to the axis of rotation of an axial turbomachine. The axial direction corresponds to the direction along the axis of rotation of the turbomachine.
    FIG. 1 is a simplified representation of an axial turbomachine. It is in this case a double-flow turbojet engine. The turbojet engine 2 comprises a first compression level, called a low-pressure compressor 4, a second compression level, called a high-pressure compressor 6, a combustion chamber 8 and one or more levels of turbines 10. In operation, the mechanical power the turbine 10 transmitted via the central shaft to the rotor 12 sets in motion the two compressors 4 and 6. The latter comprise several rows of rotor blades associated with rows of stator vanes. The rotation of the rotor around its axis of rotation 14 thus makes it possible to generate an air flow and to compress it progressively until it reaches the combustion chamber 8. Reducing means can increase the speed of rotation transmitted. compressors.
    An inlet fan commonly referred to as fan or blower 16 is coupled to the rotor 12 and generates an air flow which splits into a primary flow 18 passing through the various aforementioned levels of the turbomachine, and a secondary flow 20 passing through an annular duct (partially shown) along the machine to then join the primary flow at the turbine outlet. The secondary flow can be accelerated to generate a thrust reaction. The primary 18 and secondary 20 streams are annular flows, they are channeled by the casing of the turbomachine. For this purpose, the casing has cylindrical walls or ferrules which can be internal and external.
    FIG. 2 is a sectional view of a compressor of an axial turbomachine such as that of FIG. 1. The compressor can be a low-pressure compressor 4. There can be seen a part of the fan 16 and the separation nozzle 22 of the primary flow 18 and the secondary flow 20. The rotor 12 comprises several rows of rotor blades 24, in this case three.
    The low pressure compressor 4 comprises several rectifiers, in this case four, each containing a row of stator vanes 26. The rectifiers are associated with the fan 16 or a row of rotor vanes to straighten the flow of air, so as to convert the speed of the flow into static pressure. The stator vanes 26 extend substantially radially inwardly from their support. They have arched profiles that are rotated to straighten axially an annular flow with a circumferential component.
    Three rectifiers are integrated in the outer casing of the compressor, the corresponding vanes can be fixed by axes. An upstream rectifier, at the inlet of the compressor, may comprise vanes welded to an outer ferrule 28. This outer ferrule 28 may be carried upstream by the separation nozzle 22.
    Figure 3 shows a section of the partition beak 22 in a plane passing through the axis of rotation 14. An outer end of stator vane 26 appears.
    The separation spout 22 comprises an upstream circular cutting edge 30 where the primary flow 18 and the secondary flow 20 are divided. The separating spout 22 has an inner surface 32, essentially formed on the outer shell 28, and a surface External 34. These surfaces are annular and join at the leading edge 30. The revolution profiles of the inner surface 32 and the outer surface 34 can be generally straight, they can be inclined relative to one another. other from 5 ° to 60 °, preferably from 10 ° to 40 °, optionally from 20 ° to 30 °. The revolution profiles are around an axis of revolution 14 which coincides with the axis of rotation 14 of the turbomachine.
    The separation spout 22 comprises an upstream annular wall 36, then a downstream annular partition 38 in the direction of flow. The upstream wall 36 and the downstream partition 38 extend outwardly and downstream from the leading edge 30 and form the outer surface 34 of the spout 22. The upstream wall 36 can also extend towards the inside. The upstream wall 36 and the downstream partition 38 may have a smooth junction, their outer surfaces 34 extend and are tangent.
    The upstream wall 36 may be made of metal, for example titanium. This material provides a resistance which is necessary at the leading edge in case of shock, for example an ingestion. The metal also provides beneficial thermal conduction for defrosting. To then reduce the overall mass of the partition spout 22, the downstream partition 38 may be made of a composite material. This material may comprise an organic matrix and fibers. The matrix may be polyetherimide (PEI), polyetheretherketone (PEEK) or an equivalent material. The fibers may be carbon fibers, and / or graphite fibers, and / or glass fibers and / or any other equivalent fibers. The fibers may be short fibers, that is to say of less than 5.00 mm in length, preferably less than 2.00 mm. Such a composite offers a compromise between weight gain and rigidity, while offering the possibility of reducing the thickness of the downstream partition 38.
    To improve the conditions of their meeting, the upstream wall 36 comprises an anchoring portion 40, preferably annular. This portion 40 is disposed in the thickness of the downstream partition 38, for example at the heart, that is to say in the middle according to its thickness. The anchoring portion 40 has at least one face, preferably two faces on which the material of the partition 38 adheres. To improve the retention, the faces may have asperities such as bumps or bulges.
    The anchoring portion 40 may comprise at least one orifice 42 passing through, preferably several orifices 42 through which can form asperities. These orifices 42 make it possible to bind the upstream wall 36 and the downstream partition 38 by entangling their materials. The material of the downstream partition 38 penetrates and passes through the orifices 38 to anchor. The axial zone where the anchoring portion 40 is present reinforces the downstream partition 38. This can become composite, possibly double reinforcement through the anchoring portion and its possible fibers. The anchoring portion 40 may form a reinforcement mesh, possibly bordered by solid ribbons.
    The downstream partition 38 may comprise an annular mounting flange 44 which extends radially and which may form a separation for delimiting a plenum for a defrosting system (not shown). It can also support pipes for supplying hot fluid. It may have a series of fastening openings (not shown) to receive a flange of a downstream element. The separating nozzle 22 may comprise an annular cavity 46, for example to house equipment of the turbomachine. This cavity 46 may be formed by the upstream wall 36, the downstream wall 38 and the outer shell 28. It may be closed downstream by the annular flanges 44 mentioned above.
    The upstream wall 36 may comprise an annular thickening 48 to reinforce it, particularly in relation to the ingestions and to better support the outer shell. The leading edge 30 can be formed on the annular thickening 48. At the level of the thickening 48, the profile of revolution of the spout 22 has an arc 50 on one side. This arc may extend over the majority of the thickness of the upstream wall 36, the thickness being measurable perpendicular to the outer surface 34 of the upstream wall 36. The arc 50 may border the anchoring portion 40, so as to reduce the axial length of the upstream wall 36.
    The upstream wall 36 may comprise an annular fixing hook 52. It forms an open groove. This fixing means can be used to maintain the outer shell 28 which comes overboard. The hook 52 may comprise tubular attachment surfaces to allow axial assembly of the ferrule 28 in the upstream wall 36. The hook 52 may be arranged with passages for a hot defrost air circulation.
    The anchoring portion 40 may be disposed at the blades 26 supported by the outer shell. More precisely, the attack edges 54 of the blades 26 can extend radially in the anchoring portion 40. This tends to reduce the solid portion of the upstream wall 36, and thus to lighten the spout 22.
    At the leading edge 30, the radius R of the revolution profile of the upstream wall is less than 100 mm, preferably less than 30 mm, more preferably less than or equal to 5.00 mm. The thickness of the downstream partition 38 is less than 20 mm, preferably less than 10 mm, more preferably less than or equal to 5.00 mm.
    The separation spout 22 corresponds to a compressor inlet. According to the invention the separation nozzle can also be adapted to a fan inlet on a nacelle of the turbomachine, to form a separation lip.
    Figure 4 mounts an angular segment of the upstream wall 36 and its anchoring portion 40 which are shown in isometric view. The downstream partition is not shown for the sake of clarity. The hook 52 is visible.
    The anchoring portion 40 has a form of sheet, or sheet. It is essentially thin, of constant thickness. It extends generally in a plane extending the outer surface 34 of the upstream wall 36, or in the continuity of the general curvature of said outer surface 34.
    It can be perforated like a perforated sheet. The orifices 42 of the anchoring portion 40 may be distributed on its footprint, for example axially and / or circumferentially. They can describe a mesh, or a repeated pattern. They can be aligned. The orifices 42 may be polygons, for example triangles or hexagons as shown. The orifices 42 may be separated by rods 56 forming junctions 56. The orifices 42 may be nested so as to form a lattice on an axial zone of the anchoring portion 40 which allows to soften it. The anchoring portion 40 may be traversed, or perforated, on 25% of its surface, or predominantly perforated. That is, the majority of his reach is empty of matter.
    The anchoring portion 40 may form an area with a reduction in thickness on the upstream wall 36. It may be delimited axially upstream by two annular steps 58, which may form circular shoulders.
    Due to the dual material configuration of the separator nozzle, in particular its outer skin, it can be manufactured by a remarkable process. The method of manufacturing the spout may comprise the sequence of the following steps: (a) providing or manufacturing an upstream annular wall with a circular leading edge. The upstream wall can be manufactured by machining, such as the turning of a curved raw element. (b) molding a downstream partition on the anchoring portion. Thus, the upstream wall is anchored, sealed to the upstream partition via the anchoring portion. Step (b) molding may comprise the application of an injection mold against the outer annular surface of the upstream wall. Another mold may be applied to the interior, and may be able to form the internal flange of the partition. When closing the mold, a molding cavity is defined. This houses the anchoring portion waiting for the resin.
    权利要求:
    Claims (17)
    [1]
    claims
    Turbomachine separating spout (22), in particular an axial turbomachine (2) low-pressure compressor (4), the spout (22) comprising: an upstream annular wall (36) with an edge of circular attack (30), a downstream annular partition (38), characterized in that the upstream wall (36) comprises an annular anchoring portion (40) disposed in the thickness of the downstream partition so as to anchor the partition and the wall to each other.
    [2]
    2. Spout (22) according to claim 1, characterized in that the downstream partition (38) comprises an outer annular surface (34) and an inner annular surface, the anchoring portion (40) being at a distance from the outer surface (34) and the inner surface.
    [3]
    3. Spout (22) according to one of claims 1 to 2, characterized in that the anchoring portion (40) comprises at least one anchoring asperity (42), preferably several anchor asperities (42) distributed on its surface.
    [4]
    4. Spout (22) according to one of claims 1 to 3, characterized in that the anchoring portion (40) comprises at least one anchor hole (42), preferably several anchor holes (42) crossed by the material of the downstream partition (38), possibly the orifices (42) are hexagonal.
    [5]
    5. Spout (22) according to one of claims 1 to 4, characterized in that the anchoring portion (40) comprises an interconnected network of junctions (56), possibly repeating a pattern on the axial majority of the portion of anchoring (40) and / or substantially all the way around the partition spout (22).
    [6]
    6. Spout (22) according to one of claims 1 to 5, characterized in that the materials of the anchoring portion (40) and the downstream partition (38) are intermixed, the anchoring portion (40) being predominantly occupied by the material of the downstream partition (38).
    [7]
    7. Spout (22) according to one of claims 1 to 6, characterized in that the downstream partition (38) and the upstream wall (36) each comprise outer annular surfaces (34), said surfaces (34) being in the extension of one another and / or are tangent on the circumference.
    [8]
    8. Spout (22) according to one of claims 1 to 7, characterized in that the upstream wall (36) comprises an annular reinforcing thickening (48), the leading edge (30) being optionally formed on the ring thickening (48).
    [9]
    9. Spout (22) according to one of claims 1 to 8, characterized in that the upstream wall (36) comprises a profile of revolution with a portion delimited by an arc (50), the anchoring portion (40) extending axially from said arc (50), the arc (50) and / or the portion (40) possibly extending over most of the thickness of the upstream wall (36).
    [10]
    10. Spout (22) according to one of claims 1 to 9, characterized in that the anchoring portion (40) forms a thinner zone on the upstream wall (36), possibly the anchoring portion (40). ) is delimited upstream by at least one, preferably by at least two annular steps (58).
    [11]
    11. Spout (22) according to one of claims 1 to 10, characterized in that it comprises an outer shell (28) surrounded by the downstream partition (38), preferably the separating spout (22) comprises an annular row stator vanes (26) supported by the outer ferrule (28), the anchoring portion (40) possibly being arranged axially at the level of the blade array (26), for example at the edge of the attacking edges ( 54) of said vanes (26).
    [12]
    12. Spout (22) according to one of claims 1 to 11, characterized in that the upstream wall (36) comprises an annular fixing hook (52), preferably axially oriented downstream, the outer shell (28). possibly being attached to the annular hook (52).
    [13]
    13. Spout (22) according to one of claims 1 to 12, characterized in that the downstream partition (38) comprises a composite material with an organic matrix and fibers; the downstream partition (38) possibly being integral.
    [14]
    14. A turbomachine (2) comprising a separation nozzle, characterized in that the separation nozzle (22) is in accordance with one of claims 1 to 13, optionally the turbomachine comprises a compressor with an inlet defined by the separation nozzle .
    [15]
    15. The turbomachine (2) according to claim 14, characterized in that it comprises a blower, the separation nozzle surrounding the blower, optionally the upstream wall has a constant thickness and / or is hollow.
    [16]
    16. A method of manufacturing an axial turbomachine separation spout (22), in particular a compressor (4), the spout (22) comprising: an upstream annular wall (36) with a leading edge (30) circular, a downstream annular bulkhead (38) composite, the method comprising a step (a) supply or manufacture of an upstream annular wall (36), characterized in that the upstream wall (36) comprises a portion of anchoring (40), and in that the method comprises a step (b) molding a downstream partition (38) on the anchoring portion (40) so as to anchor the upstream wall (36) in the downstream partition ( 38) via the anchoring portion (36).
    [17]
    17. The method of claim 16, characterized in that the step (b) molding comprises the application of an injection mold against the outer annular surface (34) of the upstream wall (36).
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US15/141,926| US10156243B2|2015-05-04|2016-04-29|Composite splitter lip for axial turbomachine compressor|
    CA2928603A| CA2928603A1|2015-05-04|2016-05-03|Composite splitter lip for axial turbomachine compressor|
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