EP2951002A1 - Procédé de fabrication amélioré d'un arbre de transmission, de préférence pour système de boîte d'accessoires de turbomachine d'aéronef - Google Patents
Procédé de fabrication amélioré d'un arbre de transmission, de préférence pour système de boîte d'accessoires de turbomachine d'aéronefInfo
- Publication number
- EP2951002A1 EP2951002A1 EP14708608.6A EP14708608A EP2951002A1 EP 2951002 A1 EP2951002 A1 EP 2951002A1 EP 14708608 A EP14708608 A EP 14708608A EP 2951002 A1 EP2951002 A1 EP 2951002A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fabric
- reinforcement
- fibers
- reinforcing fabric
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
- F16C3/026—Shafts made of fibre reinforced resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
- B29C70/222—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure the structure being shaped to form a three dimensional configuration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/521—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement before the die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2063/00—Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0809—Fabrics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/748—Machines or parts thereof not otherwise provided for
- B29L2031/75—Shafts
Definitions
- the present invention relates to the field of manufacturing rotational motion shafts, preferably for aircraft turbine engine accessory drive systems.
- rotational motion shafts preferably for aircraft turbine engine accessory drive systems.
- other applications may be envisaged, for example between a motor and an aircraft accessory, such as a movable trailing edge flap.
- the invention also applies to any other field in which such rotary transmission shafts are used, as in the naval field, for example between the engine and the propeller.
- the field of the automobile may also be concerned, such as between the engine and the wheels.
- Aircraft turbine engine accessory drive systems usually comprise a plurality of housings interconnected by rotational motion shafts.
- a radial transmission shaft connects an angular gearbox to an internal drive housing itself connected to a motor shaft of the turbomachine, and another longitudinal transmission shaft connects the angular gearbox. to an accessory drive box.
- the transmission shaft may be a hybrid technical solution comprising an organic matrix composite main body, at the two ends of which are respectively mounted two metal tips, shaped to cooperate with input and output members provided on the boxes to be connected. .
- each tip is rotatably coupled to its associated body end. To do this, it is known various techniques, which however do not give complete satisfaction.
- a first technique of rotational coupling is to stick the metal tip on the end of the main body of organic matrix composite. Nevertheless, this technique by structural bonding is difficult to implement, and meets certification problems.
- a second solution lies in the presence of mechanical systems coupling in rotation the end caps on the main body of the shaft. This is for example to achieve the main body using carbon fiber braids or impregnated fibers whose ends cover a tip shaped "hedgehog". The interlocking of the braids in the hedgehog peaks confers the rotational coupling function, but this technique is costly. This disadvantage is also encountered in most other solutions with mechanical systems, which can sometimes even lead to decrease the mechanical strength of the main body of the shaft, because of its perforation required for mounting such mechanical systems.
- the subject of the invention is a method of manufacturing by pultrusion of a hollow main body of a rotating motion transmission shaft of composite material, the method comprising a step of impregnating the reinforcement, and:
- the invention is remarkable in that it combines the pultrusion technique with the implantation of a fabric comprising circumferential fibers perfectly adapted to best withstand the stresses of the end pieces intended to equip the body.
- the invention thus has a clever solution allowing the introduction of the fibers oriented substantially at 90 ° with respect to the axis of the main body, while the fibers from the pultrusion can usually be deposited at an angle less than about 45 ° with respect to this same axis.
- the resistance to "opening" of the ends of the main body is substantially improved by the presence of the reinforcing fabric, without this generates a penalizing overall mass.
- the invention makes it possible to obtain a very satisfactory compromise between a reasonable overall mass and a high resistance to the deformation of the main body, under the effect of the stresses applied in operation by the end pieces.
- the tips can be coupled to the ends of the main body on an outer wall or on an inner wall thereof.
- the manufacturing method is therefore preferably implemented so as to obtain an inner wall and / or a non-circular outer wall, in order to allow the creation of form-compliant bonds with the end pieces.
- the step of placing the reinforcing fabric is effected by fitting this sock-like fabric around the mandrel.
- said reinforcing fabric is deposited in the dry state around the pultrusion mandrel, and then impregnated with the resin of the impregnated reinforcement brought to its contact.
- the method is here even further simplified, since the impregnation of the reinforcing fabric is cleverly done by the excess of resin previously deposited on the reinforcement.
- the establishment of this fabric on the mandrel is facilitated when it is in the dry state, even if an establishment around the mandrel could be envisaged in the impregnated state, without departing from the scope of the invention. 'invention.
- a specific impregnation system could also be provided for the application of the resin on the fabric already threaded on the mandrel.
- said reinforcing fabric extends in cross section along a closed line.
- Said closed line thus has a shape complementary to that of the mandrel that it is intended to surround.
- the line may not be closed, but may have at least two overlapping edges, always so that the reinforcing fabric has a closed cross section around the mandrel.
- the envelope can be made from a fabric, for example stored in the form of a spool, and whose two opposite edges are progressively brought closer to finally ensure that the fabric completely envelops the cylindrical outer surface chuck.
- said reinforcing fabric is a 2D orthogonal fiber fabric.
- said circumferential fibers of the reinforcing fabric account for more than 80% of all the fibers of the fabric. This makes it possible to dedicate this reinforcement fabric essentially to the resistance to deformation, in the direction of the thickness of the hollow main body.
- said reinforcement is made from several unidirectional fibers.
- the method comprises, after the step of impregnating the reinforcement, a shaping step of the latter during which said reaction occurs.
- the die and the cooking device may be integrated elements to one another, or separate elements.
- the die may have several modules spaced apart from each other in the direction of circulation of the pultrusion fibers, these modules ensuring for example a gradual shaping of the desired shaft body.
- the method comprises, after the firing step, a step of cutting the tubular element obtained, so as to obtain said rotating motion shaft main body.
- the subject of the invention is also a rotary motion shaft, preferably intended to be interposed between an input member and an output member of an accessory drive system for an aircraft turbomachine, said shaft having a hollow main body obtained by the above method, at both ends of which are respectively mounted two shaft ends shaped to cooperate with said input member and said output member.
- each tip is rotatably coupled to its associated body end through a form-compliant connection formed from a first non-circular cross-sectional area on the end of the main body and receiving the associated tip.
- this configuration provides a powerful solution in terms of bending strength and rotational coupling of the main body with the end pieces.
- this rotational coupling based on the principle of complementary shape binding, is simple, effective and inexpensive, without weakening the mechanical strength of the main body of the tree.
- the circumferential fiber reinforcing fabric makes it possible to strongly limit the risks
- the end pieces can be fixed on the main body, for the sole purpose of ensuring their retention in longitudinal traction and prevent them from escaping.
- the fixing means used are then much less restrictive than those encountered in the prior art, since they are in no way dedicated to the coupling in rotation.
- these fixing means are glue.
- the first surface of the shape-compliant bond is easy to achieve with the pultrusion method specific to the present invention, this technique being also referred to as “stretch extrusion”. This is particularly the case when this first surface has an oval cross section, or is of the polygonal profile type, also called in English "polygonal curve” or "polygonal profile”.
- the invention is not limited to an application to an accessory drive system for an aircraft turbomachine, but can be integrated with any other system requiring such a rotating motion transmission shaft. It may be for example a shaft between a motor and an aircraft accessory, such as a movable trailing edge flap, or a tree for the naval field, for example between the engine and the engine. propeller, or a shaft for a motor vehicle, for example between the engine and the wheels.
- said form-complementary connection is also made from a second surface of non-circular cross-section formed on the mouthpiece and cooperating with said first surface, the shape of this second surface then being preferentially identical to that of the first surface.
- the first and second surfaces of the connection preferably have substantially identical dimensions, in order to allow them to be interlocked with preferably only one mounting set. Cold mounting is also possible, for example with nitrogen.
- Other forms could be envisaged for the second surface, without departing from the scope of the invention, but always so as to obtain form complementarity ensuring the coupling in rotation.
- said first surface formed on the end of the main body is an inner surface of the shaft, thereby implying that the tip bearing said second surface is provided to fit within its associated shaft end.
- the first surface could be an outer surface of the tree. The tip bearing the second surface would then be provided to lodge around its associated shaft end.
- the inner wall and the outer wall each have a cross section of oval shape, or of the polygonal profile type.
- the two walls are preferably centered and the thickness of the body of the shaft, defined between the two walls, is substantially constant.
- the body of the tree is therefore here in the form of a tube of oval section. However, it could be expected extra thicknesses, depending on the needs encountered.
- the hollow body thickness is non-uniform.
- One of the main advantages of the pultrusion technique is to be able to ensure a homogeneous volume distribution of the fibers, in spite of the variation of the thickness along the section.
- each endpiece further has a corrugated surface (s) / groove (s) intended to cooperate with its associated input / output member. It can indifferently be a male or female surface, depending on the nature of the surface of the input / output member with which the tip must cooperate.
- said main shaft body is made in part by pultrusion, a technique which is particularly interesting because of its low implementation cost and its ability to make resistant parts both in pairs, particular thanks to the fibers deposited at an angle of 45 ° with respect to the longitudinal axis of the tube, and bending, in particular thanks to the fibers deposited along the longitudinal axis of the tube. This is particularly the case when the piece obtained is oval or polygonal profile.
- the pultrusion technique also makes it possible to obtain precise thicknesses that are conducive to a good balancing of the trees.
- the subject of the invention is also an accessory drive system for an aircraft turbomachine comprising at least one rotary motion transmission as described above, interposed between an input member and an output member of said system.
- it comprises an internal drive housing intended to be connected to a motor shaft of the turbomachine, a gearbox, an accessory drive box, a first transmission shaft connecting the drive unit. internal and the angular gearbox, and a second transmission shaft connecting the gearbox and the gearbox of the accessories, at least one of the first and second transmission shafts being a shaft such as described above.
- the invention finally relates to an aircraft turbomachine comprising such an accessory drive system.
- FIG. 1 shows a front view of an accessory drive system for an aircraft turbomachine, according to a preferred embodiment of the present invention
- FIG. 2 is a perspective view of a portion of the accessory drive system shown in the previous figure;
- FIG. 3 shows a longitudinal sectional view of a transmission shaft specific to the present invention, equipping the accessory drive system shown in the previous figures;
- FIG. 4 represents a cross-sectional view of the transmission shaft, taken along the line IV-IV of FIG. 3;
- FIG. 5 represents a view similar to that of FIG. 4, with the transmission shaft in the form of another preferred embodiment of the invention;
- FIGS. 6a to 6d show different polygonal profiles that can be adopted for the implementation of the embodiment shown in FIG. 5;
- FIG. 7 represents a schematic side view of an apparatus for implementing a method of manufacturing the transmission shaft shown in the preceding figures, the method being in the form of an embodiment preferred embodiment of the invention
- Figure 8a is a sectional view taken along the line VI N-VIN of Figure 7, while Figure 8b is a side view of that of Figure 8a;
- Figure 9a is a sectional view taken along the line IX-IX of Figure 7, while Figure 9b is a side view of that of Figure 9a;
- FIG. 10 is a diagrammatic cross-sectional view of the apparatus shown in FIG. 7 taken at the inlet of the die.
- FIG. 11 is a schematic view illustrating the different layers of deposited fibers for obtaining the main body of the output shaft of the apparatus.
- an accessory drive system 1 for aircraft turbomachine for example a turbofan engine with double body.
- turbojet engine In known manner, a portion of the power generated by the turbojet engine is taken to supply various accessories equipping the turbojet, as well as aircraft equipment.
- the system 1 comprises firstly an internal drive housing 2, driven by a pinion integral with the shaft of the high pressure body.
- the housing 2 is connected to another angular gearbox 4 by a rotary motion transmission shaft 6, which extends radially through an arm 8 of the intermediate casing of the turbojet engine, intended to be wedged by the secondary flow.
- the array 6 may be made in two portions mounted on one another, and succeeding one another in the radial direction.
- the angular gearbox 4 is connected to an accessory drive unit 10 by another rotary motion drive shaft 12, which extends longitudinally, i.e. parallel to the longitudinal axis of the turbojet, forwards.
- the housing 10 also known as the "Accessory Gear Box” (AGB) usually drives and supports various accessories, for example a generator, a starter, an alternator, fuel and oil pumps, etc. Platforms 14 for mounting and driving these accessories are thus provided on this housing 10, which conventionally extends circumferentially around the fan casing, on a restricted angular sector.
- AGB Accessory Gear Box
- the drive system 1 allows the drive of the accessories through the shaft of the high pressure body, via the housings 2, 4, 10 and the shafts 6, 12.
- the shaft 12, of longitudinal axis 18, comprises a hollow main body 20 in the form of a tube extending preferably from one end to the other of the shaft, the length of which is for example between 215 mm and 1250 mm.
- This tube adopts a generally oval shape, and more particularly, has an inner wall 22 and an outer wall 24 both centered on the axis 18, and of oval cross-section, preferably identical in any section plane. .
- the large dimension L1 of the inner wall 22 is for example between 20 and 35 mm, while its small dimension L2 is preferably between 16 and 31.5 cm, the ratio between L1 and L2 being between 1 and 1 and 1.3.
- the thickness "e" of the tube 20 is preferably constant over its entire length and all around the axis 18, for example of the order of 2 to 5 mm for a shaft of internal and external oval sections. It will be non-constant for a section tree internal oval or polygonal and circular outer section, or vice versa. However, the volume distribution of the fibers will remain homogeneous.
- the main body 20 is made by stretch extrusion, as will be detailed hereinafter.
- the body 20 houses a metal shaft end 30a, 30b intended to be coupled in rotation with a member of the system 1. More specifically, the endpiece 30b is intended to cooperate with a body member. output 32 of the gear box 4, while the tip 30a is intended to cooperate with an input member 34 of the accessory drive housing 10. Therefore, the rotational movement of the body output 32 of the housing 4 is transmitted to the tip 30b which in turn transmits it to the body 20, by complementarity of form. In the same way, the body 20 drives in rotation along the axis 18 the other endpiece 30a, which in turn transmits the rotational movement to the input member 34 of the housing 10.
- each end piece 30a, 30b is in fact shaped to cooperate with its associated member 34, 32 by having an opening 38a, 38b delimited by an inner surface 40a, 40b with grooves or grooves, and cooperating with an outer surface 52, 54 of complementary shape provided on its associated member 34, 32. It is noted that each opening 38a, 38b is centered on the axis 18, and made through or not in the direction of this axis. Once the fluted surfaces coupled in pairs, they can then perform their function of rotational coupling of the members 32, 34 with the end pieces 30b, 30a.
- the end piece 30a and the end 20a are rotatably coupled along the axis 18 by means of a complementarily shaped connection, obtained by a first surface 58a corresponding to the end of the inner wall 22 of the body 20, and therefore having an oval cross section.
- the shape-compliant connection also incorporates a second surface 60a, also of oval cross-section, provided at the outer wall of the nozzle 30a. Similar dimensions for the surfaces 58a, 60a allow a perfect interlocking of the tip 30a in the end 20a, and provide the desired rotational coupling.
- the manufacture of the transmission shaft 12 is first implemented by the separate embodiment of its body 20 and its end pieces 30a, 30b. These are preferably metal, made by machining. As regards the body 20, it is made of organic matrix composite material, by extrusion printing using a method specific to the present invention and which will be described below. Once obtained, the end pieces 30a, 30b are housed and glued in their respective ends 20a, 20b, before the shaft is then installed in the drive system 1, on the input and output members 32 and 32. As mentioned above, it is noted that the implementation of the tips can be performed cold, preferably cooling these tips with nitrogen before sliding into the ends of the main body.
- Figure 5 shows another preferred embodiment of the present invention, in which the walls 22, 24 and the first and second surfaces 58a, 60a all have a polygonal profile, here with three lobes.
- the selected profile is of the type of that standardized under the reference P3G - DIN 32711, represented by the line 70 in the figure
- the three vertices form lobes arranged at 120 °, with the most eccentric point of each lobe inscribed on the same circle.
- polygonal profiles are also conceivable, standardized or not, for example with two lobes such as that shown in Figure 6a and similar to an oval cross sectional shape, or to four or seven lobes as has been respectively represented by the line 70 in Figures 6c and 6d.
- the polygonal profile with four lobes it may be that standardized under the reference P4C - DIN 32712.
- FIGS. 7 to 10 there is shown an apparatus 100 for the manufacture of the hollow main body 20 shown in FIGS. 3 and 4.
- This manufacturing method firstly uses the pultrusion technique, which can briefly summarize as follows.
- a reinforcement 72 here fibers packaged in coils 74, is impregnated with resin by passing through a bath 76 and pulled through a long heated die 77 which controls the resin content and determines the shape of the section. Passage through this furnace causes polymerization of the thermosetting resin and gives the final shape to the main shaft body.
- the draft is effected by dedicated means such as rollers 78 provided downstream of the heated die 77, the rotating rollers frictionally ensuring a setting in motion of the tubular element obtained 99.
- the latter is then cut to length desired by appropriate means 80, to obtain the bodies 20.
- a reinforcing fabric 82 preferably a 2D fabric in the form of a sleeve or sock.
- the fibers of the fabric 82 are, for example, glass fibers and / or carbon fibers.
- the reinforcing fabric 82 is also preferentially packaged in coil 84.
- the method according to the invention provides a step of placing this reinforcing fabric 82 around a pultrusion mandrel 86, by fitting the shaped fabric in sock on the mandrel.
- the mandrel 86 and the reinforcing fabric 82 has a cross-section of the same shape, corresponding to the shape of the inner wall desired for the main shaft body.
- the fabric 82 in the dry state is unwound continuously from the coil 84 and then placed around the mandrel 86, its setting in motion being provided by the draw rollers 80, as will be explained below.
- Figs. 8a and 8b show the fabric 82 before it wraps and embraces the mandrel over its entire outer surface, while Figs.
- FIGS. 9a and 9b show the tissue 82 after this wrap.
- the 2D fabric has longitudinal fibers 90 parallel to the longitudinal axis 94 of the mandrel, as well as circumferential fibers 92 arranged in planes orthogonal to this same axis 90, namely forming an angle of about 90 ° with this axis 94, in side view.
- the circumferential fibers are the most numerous, their proportion being greater than 80%, or even greater than or equal to 85% of all the fibers of the fabric 82, by volume and by weight.
- the fabric 82 in the form of a sock extends along a closed line 96, similar to one of the circumferential fibers 92, here of oval shape.
- the fibers 72 of the reinforcement are unwound and then, after being impregnated with resin in the bath 76, brought to a dispensing device 101 allowing them to adopt several different orientations in the manufactured element.
- the bath resin 76 can be any resin conventionally used for the pultrusion technique, such as polyester, polyurethane or epoxy resin.
- the resin retained here is preferably thermosetting, of the epoxy type.
- a shaping step is carried out by introducing the fibers 72 into the heating die 77, as shown diagrammatically in FIG.
- the fibers 72 are pressed against the pultrusion mandrel 86, around the reinforcing fabric 82 already placed thereon. During the deposition of the impregnated reinforcement 72 on the dry fabric 82, the latter is then advantageously impregnated by the surplus resin present on the reinforcement. Also, in the heating die 77, the fabric 82 and the conventional pultrusion reinforcement 72 form a single impregnated assembly which undergoes a baking step to form a one-piece tubular member 99 for constituting the main shaft body. after cutting.
- FIG. 11 shows an exemplary embodiment in which the inner layer is of course made using the fabric reinforcement 82, whose inner surface is intended to form the inner wall 22 of the main shaft body 20.
- the first 102a being longitudinal, namely having fibers parallel to the axis 94 of the cooked element obtained.
- the second layer 102b, covering the first layer 102a, for its part has fibers inclined at an angle less than 45 ° with respect to the axis 94, in a given direction, and covered by a third layer 102c, which also has fibers inclined at an angle less than 45 ° with respect to the axis 94, but in the opposite direction to that of said given direction.
- the absolute value of the angle of inclination of the fibers of the second and third layers 102b, 102c is preferably identical.
- this stack of three layers 102a, 102b, 102c is covered by an identical stack of three other layers 102d, 102e, 102f, the sixth layer 102f being intended to constitute the outer wall of the main shaft body.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Textile Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Moulding By Coating Moulds (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1350952A FR3001656B1 (fr) | 2013-02-04 | 2013-02-04 | Procede de fabrication ameliore d'un arbre de transmission, de preference pour systeme de boite d'accessoires de turbomachine d'aeronef |
PCT/FR2014/050189 WO2014118480A1 (fr) | 2013-02-04 | 2014-02-03 | Procédé de fabrication amélioré d'un arbre de transmission, de préférence pour système de boîte d'accessoires de turbomachine d'aéronef |
Publications (1)
Publication Number | Publication Date |
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EP2951002A1 true EP2951002A1 (fr) | 2015-12-09 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP14708608.6A Withdrawn EP2951002A1 (fr) | 2013-02-04 | 2014-02-03 | Procédé de fabrication amélioré d'un arbre de transmission, de préférence pour système de boîte d'accessoires de turbomachine d'aéronef |
Country Status (5)
Country | Link |
---|---|
US (1) | US9850939B2 (fr) |
EP (1) | EP2951002A1 (fr) |
JP (1) | JP2016511168A (fr) |
FR (1) | FR3001656B1 (fr) |
WO (1) | WO2014118480A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160356307A1 (en) * | 2015-05-09 | 2016-12-08 | James Walter Linck | Carbon Composite Piston Engine Crankshaft |
GB201508021D0 (en) * | 2015-05-11 | 2015-06-24 | Sigma Composites Ltd | Fibre reinforced polymer matrix composite torque tubes or shafts |
CZ2015875A3 (cs) * | 2015-12-09 | 2017-05-17 | VĂšTS, a.s. | Vačkový hřídel s odnímatelnou dvojvačkou |
KR101881928B1 (ko) * | 2016-08-08 | 2018-07-26 | 주식회사 티포엘 | 브레이딩기를 포함하는 자동차용 복합재 샤프트 제조 시스템 및 자동차용 복합재 샤프트 제조 방법 및 그 제조 방법에 의해 제조된 자동차용 복합재 샤프트 |
FR3075898B1 (fr) * | 2017-12-22 | 2019-11-29 | Safran Transmission Systems | Arbre de transmission pour une turbomachine |
CN111501194A (zh) * | 2020-05-06 | 2020-08-07 | 深圳市奔雷材料制品有限公司 | 一种在线连续缠绕编织方法 |
FR3133171A1 (fr) * | 2022-03-04 | 2023-09-08 | Conseil Et Technique | dispositif de transmission de mouvement pour un aéronef |
BE1030550B1 (fr) * | 2022-05-23 | 2023-12-18 | Safran Aero Boosters | Accouplement par profils polygonaux de pompes dans un groupe de lubrification |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3126679A1 (de) * | 1981-07-07 | 1983-01-27 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | Einrichtung und verfahren zum herstellen von rohrkoerpern aus gewebeschlaeuchen |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4214932A (en) * | 1979-05-17 | 1980-07-29 | Exxon Research & Engineering Co. | Method for making composite tubular elements |
US5363929A (en) * | 1990-06-07 | 1994-11-15 | Conoco Inc. | Downhole fluid motor composite torque shaft |
DE69103417T2 (de) * | 1990-06-07 | 1994-12-01 | Conoco Inc | Drehmomentwelle aus verbundwerkstoff für einen mit flüssigkeitbetriebenen bohrlochmotor. |
US5698055A (en) * | 1996-04-24 | 1997-12-16 | Benkoczy; Andrew J. | Method of manufacturing composite tube |
JPH10193466A (ja) * | 1996-12-30 | 1998-07-28 | Arisawa Mfg Co Ltd | Frp製管体の成形方法 |
CA2481730C (fr) * | 2002-04-19 | 2010-03-23 | Bell Helicopter Textron Inc. | Arbre d'entrainement composite a adaptateurs d'extremite prisonniers |
JP2005145635A (ja) * | 2003-11-14 | 2005-06-09 | Kurimoto Kasei Kogyo Kk | 強化プラスチック製巻芯及びその製造方法 |
DE102007051517B4 (de) * | 2006-12-22 | 2020-02-27 | Leichtbau-Zentrum Sachsen Gmbh | Hohlwelle aus Faserverbundwerkstoff und darauf zu befestigende Funktionselemente |
FR2940247B1 (fr) | 2008-12-19 | 2011-01-21 | Snecma | Systeme d'helices contrarotatives entrainees par un train epicycloidal offrant une repartition de couple equilibree entre les deux helices |
FR2942615B1 (fr) | 2009-02-27 | 2011-04-01 | Snecma | Dispositif a helices contrarotatives ayant un moyen de changement de pas des helices |
FR2957329B1 (fr) | 2010-03-15 | 2012-08-03 | Snecma | Mecanisme de calage variable de pales pour systeme d'helices contrarotatives et systeme d'helices contrarotatives comportant au moins un tel mecanisme |
-
2013
- 2013-02-04 FR FR1350952A patent/FR3001656B1/fr active Active
-
2014
- 2014-02-03 JP JP2015555776A patent/JP2016511168A/ja active Pending
- 2014-02-03 EP EP14708608.6A patent/EP2951002A1/fr not_active Withdrawn
- 2014-02-03 WO PCT/FR2014/050189 patent/WO2014118480A1/fr active Application Filing
- 2014-02-03 US US14/764,871 patent/US9850939B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3126679A1 (de) * | 1981-07-07 | 1983-01-27 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | Einrichtung und verfahren zum herstellen von rohrkoerpern aus gewebeschlaeuchen |
Non-Patent Citations (1)
Title |
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See also references of WO2014118480A1 * |
Also Published As
Publication number | Publication date |
---|---|
US9850939B2 (en) | 2017-12-26 |
WO2014118480A1 (fr) | 2014-08-07 |
JP2016511168A (ja) | 2016-04-14 |
US20150377282A1 (en) | 2015-12-31 |
FR3001656B1 (fr) | 2015-06-26 |
FR3001656A1 (fr) | 2014-08-08 |
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