• 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:
    Control surface element (1) for an aircraft, in particular a spoiler flap, having an upper outer skin element (2) which has an outer surface (4) which can be surrounded by air, with a lower outer skin element (3), with at least one reinforcing rib (8) and with a core element (9) of a foam material, wherein the reinforcing rib (8) between two core segments (10) of the core element (9) is arranged.
    公开号:AT517198A1
    申请号:T50332/2015
    申请日:2015-04-24
    公开日:2016-11-15
    发明作者:
    申请人:Facc Ag；
    IPC主号:
    专利说明:

    The invention relates to a control surface element for an aircraft, in particular spoiler, having an upper outer skin element which has an outer surface that can be forced around the air, with a lower outer skin element, with at least one reinforcing rib and with a core element made of a foam material.
    Furthermore, the invention relates to a method for producing a control surface element, in particular a spoiler, wherein an upper outer skin element is connected to a lower outer skin element, wherein at least one reinforcing rib is formed, wherein a core element is provided of a foam material.
    Various designs of air-flow aerodynamic control surfaces have been proposed in the prior art which accomplish the flight control. [0005] In the case of spoilers, a honeycomb core structure has been conventionally provided, which consists of load-bearing cover skins and a support core in honeycomb form (English "honeycomb") exists. However, this embodiment has several disadvantages. It has been found that the known control surfaces with honeycomb structure on the one hand are prone to water ingress. On the other hand, a uniform impact protection could not always be guaranteed. In the event of an impact between the walls of the honeycomb core, damage may occur. In addition, the aviation industry is constantly striving to achieve weight savings.
    No. 6,234,423 B1 describes an elevator in which an upper outer skin and a lower outer skin are manufactured in two separate method steps. Each skin is formed by core-prepregs (i.e. semi-finished fiber prepreg impregnated with reaction resins) which is cured in an autoclave under pressure and heat. Subsequently, the upper outer skin is glued to the lower outer skin. In the production of the outer skins stiffening ribs are formed, which have a self-contained cross-section, which is filled with a foam core. However, voids are formed between the stiffening ribs.
    The known method is disadvantageously limited to the production of elevators, wherein the procedure is also very complicated. The production of the outer skins by pre-pregs in separate process steps is complex and expensive. In addition, the adhesive bonds between the upper and lower outer skin weak points, which are prone to damage, especially by impact loads are. Accordingly, no effective power transmission from the top to the bottom of the control surface can be ensured. Another disadvantage is that the known elevator between the stiffening ribs provides cavities that are prone to water intrusion. Due to these limitations, the known method could not meet the applicable aviation requirements.
    Accordingly, the object of the invention is to eliminate or alleviate any or all of the disadvantages of the prior art. The invention is therefore in particular for the purpose of creating a control surface element of the type mentioned, which is produced by a simplified method, in particular with an infusion method, and facilitates the formation of at least one reinforcing rib.
    According to the invention, the reinforcing rib is arranged between two core segments of the core element.
    Advantageously, the reinforcing rib (or a semifinished product for forming the reinforcing rib) can be reliably guided laterally through the core segments, i. in the longitudinal direction of the control surface element (or spanwise of the aircraft), are fixed. Preferably, a plurality of spaced apart in the longitudinal direction of the cam element reinforcing or stiffening ribs are provided. The embodiment of the invention enables the manufacture of the control surface element in an infusion process in which a plastic in the liquid state passed through a semi-finished fiber product, in particular sucked, is to produce the upper outer skin, the lower outer skin and the reinforcing rib together. During manufacture, the reinforcing rib can be precisely positioned and shaped by the core segments in contact therewith. In addition, the arrangement of the Ker nelements has the advantage that the control surface element is better protected against ingress of water during operation. Furthermore, it is advantageous that the impact protection is improved. Apart from the at least one reinforcing rib between the core segments, when the core member extends over substantially the entire length (or longitudinal extent of the cam member) of the space between the upper and lower outer skins of the cam member, water ingress along the cam member may be reliable be prevented. Moreover, it is preferably provided that the core segments of the one- or multi-part core element extend over substantially the entire width (i.e., its extent in the main plane of the control surface element, substantially perpendicular to its longitudinal direction) of the gap between the upper and lower outer skin. On the one hand, this has the advantage that the reinforcing rib is fixed over its length. On the other hand, the protection against ingress of water can be further improved. For the purposes of this disclosure, the directional indications "up", "down", "front", "rear" refer to the installation condition of the control surface element in the preferred application to a spoiler. For other types of control surfaces, the directional information shall be transmitted analogously.
    In order to stabilize the reinforcing rib (or a semifinished product for forming the reinforcing rib) during production in the longitudinal direction of the cam element, it is favorable if the reinforcing rib has at least one web extending substantially perpendicular to the longitudinal direction of the upper outer skin element, wherein the one Core segment with the one longitudinal side of the web of the reinforcing rib and the other core segment with the other longitudinal side of the web of the reinforcing rib in contact. Preferably, the web of the reinforcing rib is arranged substantially perpendicular to the upper outer skin element. In this way, during production, for example in an infusion process, the reinforcing rib is reliably held between the two core segments.
    The reinforcing rib may have different cross-sectional geometries. However, it is preferred that the Verstärkungsrip pe has an open cross-section. In contrast to a closed cross-section, this means that the reinforcing rib does not have an interior space that is closed on all sides. The reinforcing rib is therefore held in the longitudinal direction of the cam member (i.e., in the spanwise direction of the airplane wing) by the core segments which are in contact with the reinforcing rib.
    In order to effect a force transmission between the upper side of the control surface element and the underside of the control surface element, the web of the reinforcing rib preferably extends from the inner side of the upper outer skin element to the inner side of the lower outer skin element.
    Preferably, the core member substantially completely fills interstices formed between the upper skin member, the lower skin member, and the at least one reinforcing rib. In this embodiment, the control surface element is substantially free of internal cavities, whereby a water intrusion can be reliably prevented. Incidentally, the protection against impact loads in the installed state is significantly improved. On the other hand had control surface elements in the form of spoilers with Honeycomb core on the one hand the disadvantage that water can penetrate into the empty spaces. On the other hand, shock loads between the walls of the honeycomb structure could cause damage. In addition, the present embodiment has the advantage that the reinforcing rib (or the semi-finished product intended for that purpose) is fixed on all sides during the manufacturing process.
    According to a particularly preferred embodiment variant is provided as a reinforcing rib, a fiber composite element, in particular made of kohlen-kohlen-reinforced plastic, which is arranged between two separate core segments of the core element. The fiber composite element is formed by a semi-finished fiber product, in particular a fiber fabric, a fiber fabric, a fiber braid, a Faserbestick, a fiber mat, which is impregnated or infiltrated with a cured plastic, such as epoxy resin.
    In this embodiment, it is favorable if the reinforcing rib has at least one upper flange extending substantially parallel to the main plane of the upper outer skin element, arranged on the inner side of the upper outer skin element, and / or one extending substantially parallel to the main plane of the lower outer skin element, on the inner side of the lower Has outer skin member disposed lower flange, wherein the upper and / or lower flange is arranged at an angle, preferably substantially at right angles to the web of the reinforcing rib. Preferably, the reinforcing rib on a C-profile, which is formed by the web with the flanges thereof angled. This embodiment allows a favorable load transfer from the upper outer skin member with the upper-side outer surface and from the lower outer skin member with the lower-side outer surface in the reinforcing rib of the cam member.
    In order to arrange the upper or lower flange of the reinforcing rib substantially flush with adjacent sections of the upper or lower side of the core element, it is preferably provided that at least one of the core segments at a lower side facing the inner side of the lower outer skin element has a lower recess for the lower flange the reinforcing rib and / or on one of the inside of the upper outer skin member facing upper side has an upper recess for the upper flange of the reinforcing rib. In this way, the core element can substantially completely fill the gap between the upper and lower outer skin elements.
    According to an alternative preferred embodiment, the core element for forming the at least one reinforcing rib is provided with seams made of fiber composite material. Thus, in this embodiment, the reinforcing rib is formed by a replacement structure of reinforcing seams. The reinforcing rib is arranged in this embodiment between two core segments, which are formed on both sides of the seam of fiber composite material. By precisely fitting arrangement of the seams of fiber composite material in through holes of the core element, the semi-finished fiber product for the formation of the reinforcing rib is fixed during manufacture. The reinforcement of foam with seams of fiber composite material is known in the art per se. For example, EP 1 993 526 B1 describes a method with which reinforced foam materials for the aircraft industry can be produced. As with this prior art, in the manufacture of the present cam member, a through hole may first be created in the foam material of the core member. Thereafter, a fiber bundle is placed on one side of the core member, thereafter a hook-shaped needle is guided from the other side of the core member through the through hole, and finally the fiber bundle is pulled through the through hole in the foam material. The fiber bundle is impregnated with plastic in the liquid state during manufacture in order to obtain the seams of fiber composite material. In this embodiment, therefore, the reinforcing rib is integrated into the core element, which is preferably formed in one piece. The fiber bundle preferably consists of a multiplicity of individual fibers or monofilaments.
    To form the reinforcing rib in the core element, it is advantageous if the seams of fiber composite material each extend from the top of the core element facing the upper outer skin element to the underside of the core element facing the lower outer skin element. This embodiment also allows the arrangement of the seams in through holes of the core element, which extend from the top to the bottom.
    In order to form the reinforcing rib in the transverse direction of the control surface element, it is advantageous if a plurality of seams of fiber composite material at a substantially perpendicular to the upper or. Lower side extending plane of the core element are arranged. In this embodiment, the reinforcing rib is obtained by providing the core member with a plurality of individual seams along a vertical plane, which as a whole constitute the reinforcing rib in the transverse direction of the cam member. Preferably, individual sutures are substantially over the entire width of the core member, i. over its entire extent perpendicular to the longitudinal direction of the cam member provided.
    In order to form a reinforcing rib with a certain width (or extent in the longitudinal direction of the control surface element), it is favorable if a plurality of planes of the core element that are substantially perpendicular to the top or bottom are interspersed with seams of fiber composite material. The width of the reinforcing rib is determined by the distance between the outer vertical planes with the seams viewed in the longitudinal direction of the control element. The length of the reinforcing rib preferably corresponds substantially to the width of the core element, which in the case of a spoiler flap is the extent in the direction of flight or flight.
    In this embodiment, it is also advantageous if between the top of the core member and the inside of the upper outer skin member, in the region of the reinforcing rib forming seams of fiber composite material, a planar fiber composite element is arranged, which is preferably arranged substantially perpendicular to the reinforcing rib. Accordingly, between the lower side of the core element and the inner side of the lower outer skin element, in the region of the fiber composite seams forming the reinforcing rib, a further planar fiber composite element may be arranged, which is also preferably arranged substantially perpendicular to the reinforcing rib. The flat fiber composite elements can be sewn to the core element. In this embodiment, a cross-sectional I-shaped or C-shaped reinforcing structure can be provided, wherein the reinforcing rib forms the web, the flat fiber composite element the upper flange and the further fiber composite element forms a lower flange of the C or I-shaped reinforcing structure.
    For reasons of stability, it is favorable if the seams of fiber composite material are arranged at an angle deviating from 90 ° of preferably between 30 and 60 °, in particular of substantially 45 °, to the upper or lower side of the core element.
    In the case of known control surface elements, in particular spoilers, a reinforcing or end strip made of fiber composite material has often been arranged on the rear edge viewed in the direction of flight (in aircraft construction.) In the embodiment described above, the core element can be used instead of the reinforcing strip at a trailing edge with a reinforcing structure running essentially in the longitudinal direction of the upper outer skin element, which is formed by further seams made of fiber composite material In this embodiment, the core element in the region of the trailing edge is penetrated by seams, which together form the reinforcing structure in the longitudinal direction (ie at a spoiler in the spanwise direction) of the control surface element. Preferably, the reinforcing structure extends substantially the entire length of the core member, i. essentially over its entire extent in the longitudinal direction of the cam element. The other seams for the reinforcing structure at the trailing edge of the core element may be formed like the seams for the reinforcing rib, so that reference can be made to the above explanations. In addition, seams may be provided at an angle of substantially 90 ° to the top or bottom of the core element here.
    According to an alternative preferred embodiment, a separate from the core element foam element is provided for forming the reinforcing rib, which is provided with seams made of fiber composite material. In this embodiment, a foam member of higher density or strength between two core segments of the core element is preferably arranged with a lower density or strength compared to. To obtain the reinforcing rib, seams of fiber composite pass through corresponding through holes of the foam element.
    The above-described embodiment has the particular advantage that the foam element of the reinforcing rib can consist of a foam which is different from the foam material of the core element or of the same foam material, with a comparatively higher density. Advantageously, the foam of the foam element can be optimized in this way with regard to the introduction of the seams of fiber composite material or the lower resin acceptance. In contrast, the foam material of the core element can be adapted to its intended use.
    In order to achieve an integral control surface element, it is favorable if the upper outer skin element, the lower outer skin element and the at least one reinforcing rib made of fiber composite material, in particular carbon fiber reinforced plastic, wherein the upper outer skin member, the at least one reinforcing rib and the lower outer skin member via the plastic of the fiber composite material with each other are connected. Advantageously, an integral connection is created between the upper outer skin element, the lower outer skin element and the reinforcing rib arranged therebetween, which is formed essentially exclusively by the plastic of the fiber composite material. This means that the plastic in the liquid state soaks through a semifinished fiber with which the upper or lower outer skin element and the reinforcing rib is formed. Due to the impregnation of the semifinished fiber with the plastic in the liquid state, the cohesive connection between the upper and lower outer skin member and the at least one reinforcing rib is achieved. This embodiment causes a substantial simplification over the prior art, in which the upper and lower outer skin member together with reinforcing ribs made separately from each other and then glued together (or bolted or riveted). Advantageously, in the present embodiment, such an adhesive bolt or rivet connection between the upper and lower outer skin member and the reinforcing rib can be dispensed with, thereby eliminating a structural weakness of the cam member. Furthermore, any existing drill holes in the prior art can be eliminated which are potential leaks for fluid entry. In addition, the procedure can be made much easier and faster.
    In order to keep the weight of the control surface element as low as possible, but to ensure sufficient stability for the reinforcing rib, it is advantageous if the foam material of the core element is formed from polymethacrylimide. Such a foam is sold, for example, under the trade name "Rohacell." This foam has a weight of 31 kilograms per cubic meter, but other rigid foams may be used for the core element, such as polyvinyl chloride or polyurethane.
    In the method according to the invention, the reinforcing rib is positioned or formed between two core segments of the core element. This method brings with it the advantages described above for the cam element, which can thus be referred to. Essential for the invention is that the reinforcing rib is fixed laterally between the core segments of the core element during the manufacturing process, whereby the exact positioning and shaping of the reinforcing rib is ensured.
    To produce the control surface element, a semifinished fiber product for forming the upper outer skin element, the lower outer skin element and the at least one reinforcing rib in the dry state is preferably arranged on the core element and then impregnated with a plastic in the liquid state. In this embodiment, therefore, the upper skin member, the lower skin member, and the at least one reinforcing rib are manufactured in the same process step ("in one shot"). That is, the upper and lower skin members together with the reinforcing rib are bonded together in the uncured state of the plastic Therefore, it is not necessary to produce the upper skin member and the lower skin member as usual in the prior art in separate processes by curing prepregs in an autoclave and thereafter bonding, bolting or riveting together in the cured state The use of an autoclave is not required in the present embodiment.The curing of the impregnated fiber semi-finished product can take place in a furnace under temperature or vacuum.
    In order to form the upper outer skin element, the lower outer skin element and the at least one reinforcing rib in one process step, it is advantageous if the semifinished fiber article is arranged by means of a film in an infusion space having at least one supply line for the plastic in the liquid state and at least one vacuum line connected by applying a negative pressure to the vacuum line of the art
    Material is sucked in the liquid state, wherein the semi-finished fiber product is impregnated to form the upper outer skin member, the lower outer skin member and the at least one reinforcing rib. The control surface element is therefore preferably produced in an infusion method, wherein the core element ensures that the semifinished fiber product for the at least one reinforcing rib is held in the desired position when the plastic is passed through the semifinished fiber product in the liquid state. Such infusion methods are known per se in the prior art.
    Preferably, a method known as MARI ("Membrane Assisted Resin Infusion") is used, which is described in European Patent EP 2 681 037. Using this method, the semifinished fiber article is placed on a carrier mold, with an air-tight film sealed to the carrier mold The infusion space is connected, on the one hand, to at least one supply line for the plastic in the liquid state and on the other hand to at least one vacuum line permeable to air and impermeable membrane filter, which in case of impregnation with resin in a substantially airtight state passes .. After complete impregnation of the semifinished fiber product, the plastic enters the vacuum line, which has the membrane filter In complete wetting m The resin closes the membrane filter, interrupting the air extraction. In a preferred embodiment of the membrane filter, which is known from sportswear, a thin silicone skin is provided, which is stretched in the manufacturing process such that fine pores are generated, which are permeable to air, but for a liquid, in the present case resin, impermeable. In contact with resin, the pores are gradually closed, so that the membrane is in the airtight state. The silicone skin may be bonded to a support layer in the form of a fabric.
    In addition, it is also conceivable to produce the control surface element using the injection method described in EP 1 181 149 B1.
    The invention will be explained below with reference to preferred embodiments, to which it should not be limited. In the drawing shows:
    Figure 1 is an exploded view of a control surface element according to the invention with an upper and a lower outer skin element, wherein a plurality, in the embodiment shown eight, reinforcing ribs between core segments of a rigid foam core element are arranged.
    FIG. 2 shows a view of a further control surface element according to the invention with a view of its underside, wherein the lower outer skin element has been omitted; FIG.
    3 shows a view of a further control surface element according to the invention with a view of its underside, wherein the lower outer skin element is again omitted;
    Fig. 4 is a plan view of the core member for the cam member of Fig. 3;
    5 shows a view of the detail A drawn in FIG. 4 with a circle;
    Fig. 6 is a section along the line VI-VI in Fig. 5;
    7 shows schematically the production of the core element according to FIGS. 4 to 6;
    8 shows a section of a core element for a further control surface element according to the invention, wherein a separate foam element with seams of fiber composite material is arranged between two core segments to form a reinforcement rib;
    9 shows a section along the line IX-IX in FIG. 12 for illustrating the infusion method for producing the control surface element according to FIG. 1; FIG.
    FIG. 10 is a view of detail B indicated by a circle in FIG. 9; FIG.
    Fig. 11 is a view of the detail C drawn in Fig. 9 with a circle;
    FIG. 12 schematically shows a device for producing the control surface element according to FIG. 1; FIG.
    FIG. 13 schematically shows a plan view of the device according to FIG. 12; FIG. and
    14 shows schematically the production of a C-shaped reinforcing rib for the control surface element according to FIG. 1.
    FIGS. 1, 2 show a control surface element 1 for an aircraft (not shown). In the embodiment shown, the control surface element 1 is designed as a spoiler or spoiler for an aircraft. Corresponding embodiments, however, can also be provided in other air-flow control surfaces of aircraft, especially in oars and (landing) flaps. The control surface element 1 has an upper shell element 2 and a lower shell or outer skin element 3 (based on the installed state in an aircraft wing). The upper outer skin element 2 has on the upper side an aerodynamic, substantially planar outer surface 4 which is surrounded by air. The lower skin element 3 is arranged in the inactive state of the spoiler inside the aircraft wing. The control surface element 1 has a bearing device 5 for the articulated mounting of the fiber composite element 3 on a structural component, namely on an aircraft wing box. In the embodiment shown, the bearing device 5 has a bearing element 6 provided centrally on a front longitudinal edge (viewed in the direction of flight) of the control surface element 1, with which a pivotable mounting of the control surface element 1 on the aircraft wing can be achieved. The bearing element 6 can also be arranged off-center. The terms "front", "rear", "top", "bottom" for the purposes of this disclosure refer to the intended installation state of the control surface element 1. The control surface element 1 is substantially rectangular in plan view, so that a longitudinal extent (at the spoiler in the spanwise direction) and a transverse extension (in the spoiler flap substantially perpendicular to the spanwise direction) is formed. The bearing device 5 has laterally on the front edge further bearing elements 7. Since the design of the bearing device 5 in the prior art is well known, it is possible to dispense with more detailed explanations (see, for example, also AT 409 482 B).
    As is further apparent from FIGS. 1, 2, a plurality of elongated reinforcing ribs 8 are arranged between the upper outer skin element 2 and the lower outer skin element 3 and are spaced apart in the transverse direction of the control surface element 1. The reinforcing ribs 8 cause a reinforcement or stiffening of the control surface element 1. As reinforcing ribs 8 in the embodiment of Fig. 1 individual fiber composite elements, in particular made of carbon fiber reinforced plastic, are provided.
    In addition, in Fig. 1, 2, a core element 9 can be seen, which consists of individual core segments 10. The core element 9 consists of a foam material, preferably of poly-methacrylimide. In the embodiment shown, each reinforcing rib 8 is arranged substantially accurately between two core segments 10 of the core element 9. The individual core segments 10 of the core element 9 substantially completely fill the interstices between the upper outer skin element 2, the lower outer skin element 3 and the individual reinforcing ribs 9 (or a reinforcing or end strip at the trailing edge). 1, 2 a wedge element 9a, in particular made of glass fiber reinforced plastic, at a corner region of the core element 9 and perpendicular to the core element 9 standing pipe elements 9b, in particular made of carbon fiber reinforced plastic, in the region of the bearing device 5 can be seen. Depending on the design, the tube element 9b can also be omitted.
    According to FIG. 1, each reinforcing rib 8 has exactly one web 11 which extends substantially perpendicular to the longitudinal direction 2 a of the upper outer skin element 2 and which is arranged substantially perpendicular to the main plane of the upper 2 and / or lower outer skin element 3. In the installed state, the webs 11 of the reinforcing ribs 8 on both longitudinal sides in contact with a respective core segment 10, whereby the reinforcing ribs 8 are fixed in position. The web 11 of the reinforcing rib 8 extends from the inside of the upper skin member 2 to the inside of the lower skin member 3. Accordingly, the height of the web 11 (i.e.
    Main plane of the upper skin member 2) is substantially the distance between the inside of the upper skin member 2 and the inside of the lower skin member 3. In addition, the reinforcing rib 8 shown in Fig. 1 has a substantially parallel to the main plane of the upper skin member, on the inside of the upper outer skin member 2 arranged upper flange 12 and a substantially parallel to the main plane of the lower skin member 3, arranged on the inside of the lower skin member 3 lower flange 13 on. The upper flange 12 and the lower flange 13 are each arranged at right angles to the web 11 of the reinforcing rib 8 in the embodiment shown.
    Depending on the version, however, deviating angular positions of the upper 12 or lower flange 13 may also be provided.
    1, the core segments 10 on lower side facing the inside of the lower outer skin element 3 have lower depressions 14 for the lower flanges 13 of the reinforcing ribs 8 and upper depressions 15 for the upper side facing an inner side of the upper outer skin element 2 Flanges 12 of the reinforcing ribs 8 on. In addition, the reinforcing ribs 8 can have wing elements which are arranged substantially perpendicularly to the main plane of the upper outer skin element 2 and are extended in the longitudinal direction 2 a, which are arranged on corresponding end depressions of the core element (not shown).
    3 to 6 show an alternative embodiment of the control surface element 1, in which the core element 9 is penetrated to form the reinforcing ribs 8 with seams 18 made of fiber composite material. The seams 18 made of fiber composite material each extend from the upper outer skin member 2 facing upper side of the core member 9 to the lower outer skin member 3 facing bottom of the core element 9. To form the reinforcing rib 8 in the transverse direction of the cam element 1 are a plurality of seams 18 made of fiber composite material at one are arranged substantially perpendicular to the top or bottom plane of the core element. In the embodiment shown, a plurality of planes of the core element 9, which are substantially perpendicular to the top or bottom and are arranged at a distance from one another, are penetrated by seams 18 made of fiber composite material. The seams 18 made of fiber composite material are arranged in the embodiment shown at an angle of substantially 45 ° to the top or bottom of the core element. In addition, flat or planar fiber composite elements can be provided on the top or bottom of the core element, which are connected directly to the reinforcing rib 8 of the seams 18. In this way, an upper or lower flange reinforcement is formed on the inner side of the upper outer skin element 2 or on the inner side of the lower outer skin element 3. To form the flat fiber composite elements, a semifinished fiber product, for example a fiber fabric, can be arranged in the upper or lower side of the core element, above or below the semi-finished fiber product for the reinforcing rib 8, wherein the semifinished fiber product is impregnated with plastic in the infusion process , Depending on the design, a cross-sectionally C- or I-shaped reinforcing structure is created in this way.
    3, 4 further seen, the core element 9 is provided at a trailing edge with a substantially in the longitudinal direction 2a of the upper outer skin member 2 extending reinforcing structure 19, which is formed by further seams 20 made of fiber composite material.
    Fig. 7 shows diagrammatically the manufacture of the core element 8 reinforced with seams of fiber bundles. According to arrow 100, a cuboid block of foam material is provided. From the block-shaped block, the core element 9 is generated, for example milled, cf. Arrow 101, to obtain a (still unreinforced) core element 9 made of foam material (arrow 102). Finally, the seams 18 are provided with the aid of the method of EP 1 993 526 B1 so that the reinforcing ribs 8 are formed in the transverse direction of the core element 9.
    8, a separate from the core element 9 foam element 21 is provided for forming the reinforcing rib 8, which is provided with seams 18 of fiber bundles. The foam element 21 of the reinforcing rib 6 may consist of a foam different from the foam material of the core element 9 or of the same foam but with a higher density.
    FIGS. 9 to 13 show a preferred infusion method for producing the previously described control elements 1. This method will be described with reference to the cam member 1 of Figs. 1, 2, but may also be used to manufacture the cam member 1 of Fig. 3.
    In this method, a semifinished fiber 22 is disposed on the core element 9 in the dry state. The portions of the semi-finished fiber product 22 for the upper outer skin element 2 are placed on a (only schematically illustrated) support form 23. The core segments 10 are positioned between the proportions of the semifinished fiber article 22 for the lower outer skin element 3 and the proportions of the semifinished fiber article 22 for the reinforcing ribs 8. As a result, the proportions of the semi-finished fiber product 22 for the reinforcing ribs 8 during the infusion process are reliably held by the core segments 10 of the core element 9. The cross-sectionally C-shaped reinforcing ribs 8 can be preformed by means of a molding tool 24 (see FIG. However, it is also possible to bring the proportions of the semi-finished fiber product 22 for the reinforcing ribs 8 only on the supporting form 23 in the form.
    As further shown in FIG. 9, the semifinished fiber product 22 of the control surface element 1 on the supporting form 3 with a foil or. Tissue structure sheathed. On the outside of an air-tight film 26 (also referred to as a vacuum bag) is provided, which is attached via a sealing device 27 on the support mold 23. Between the airtight film 26 and the supporting form 23, an infusion space 25 for impregnation of the semifinished fiber 22 is created. Furthermore, a flow aid or distribution membrane 28 is provided with which the sucked plastic can be distributed on the component surface. In addition, a tear-off fabric 29 ("peel ply") is provided, which is applied directly on the underside of the control surface element 1. The tear-off fabric 29 facilitates the removal of the distributor membrane 28 saturated with the plastic or matrix material.
    As is further apparent from FIGS. 9 to 11, supply lines 30 for the plastic in the liquid state (see arrows 31) are provided. In the embodiment shown, the leads 30 are provided both on the side of the carrier form 23 and on the side of the airtight foil 26. In addition, vacuum lines 32 are provided on the side facing away from the support form 23, to each of which a negative pressure is applied. By applying the negative pressure to the vacuum lines 32 of the plastic is sucked in the liquid state through the leads 30 in the infusion chamber 25, wherein the fiber semi-finished 22 is impregnated to form the upper outer skin member 2, the lower outer skin member 3 and the reinforcing ribs 8 with the plastic. After complete saturation of the semi-finished fiber product 22, the plastic enters the vacuum lines 32 (compare arrows 33). In each vacuum line 32 a permeable in the dry state and resin-impermeable membrane filter (not shown) is arranged, which merges with a saturation with the plastic in a substantially airtight state. When completely wetted with the plastic, the membrane filter closes, interrupting the air extraction. Subsequently, the control surface element 1 is cured in a furnace (not shown).
    权利要求:
    Claims (20)
    [1]
    claims:
    A control surface element (1) for an aircraft, in particular a spoiler, having an upper outer skin element (2) which has an air-flowable outer side (4), with a lower outer skin element (3), with at least one reinforcing rib (8) and with one Core element (9) made of a foam material, characterized in that the reinforcing rib (8) between two core segments (10) of the core element (9) is arranged.
    [2]
    Second control surface element (1) according to claim 1, characterized in that the reinforcing rib (8) at least one substantially perpendicular to the longitudinal direction (2a) of the upper outer skin member (2) extending web (11), wherein the one core segment (10) the one longitudinal side of the web (11) of the reinforcing rib (8) and the other core segment (10) with the other longitudinal side of the web (11) of the reinforcing rib (8) is in contact.
    [3]
    3. Control surface element (1) according to claim 1 or 2, characterized in that the web (11) of the reinforcing rib (8) extends from the inside of the upper outer skin element (2) to the inside of the lower outer skin element (3).
    [4]
    4. control surface element (1) according to one of claims 1 to 3, characterized in that the core element (9) between the upper outer skin member (2), the lower outer skin member (3) and the at least one reinforcing rib (8) formed gaps substantially completely fills.
    [5]
    5. control surface element (1) one of claims 1 to 4, characterized in that the reinforcing rib (8) is a fiber composite element, in particular of carbon fiber reinforced plastic, is provided, which is arranged between two separate core segments (10) of the core element (9).
    [6]
    6. control surface element (1) according to claim 5, characterized in that the reinforcing rib (8) at least one substantially parallel to the main plane of the upper outer skin member (2) extending, on the inside of the upper outer skin member (2) arranged upper flange (12) and or a lower flange (13) extending substantially parallel to the main plane of the lower skin member (3), disposed on the inside of the lower skin member (3), the upper (12) and / or lower flange (13) being at an angle , Preferably, substantially at right angles to the web (11) of the reinforcing rib (8) is arranged.
    [7]
    7. control surface element (1) according to claim 6, characterized in that at least one of the core segments (10) on one of the inside of the lower outer skin member (3) facing bottom a lower recess (14) for the lower flange (13) of the reinforcing rib (8 ) and / or on an upper side facing the inside of the upper outer skin element (2) has an upper recess (15) for the upper flange (12) of the reinforcing rib (8).
    [8]
    8. control surface element (1) one of claims 1 to 7, characterized in that the core element (9) for forming the at least one reinforcing rib (8) is provided with seams (18) made of fiber composite material.
    [9]
    9. control surface element according to claim 8, characterized in that the seams (18) made of fiber composite material each of the upper outer skin element (2) facing the upper side of the core element (9) to the lower outer skin element (3) facing the underside of the core element (9) extend.
    [10]
    10. control surface element (1) according to claim 8 or 9, characterized in that a plurality of seams (18) made of fiber composite material at a substantially perpendicular to the top or bottom extending plane of the core element (9) are arranged.
    [11]
    11. Control surface element (1) according to claim 10, characterized in that a plurality of substantially perpendicular to the top or bottom extended, arranged at a distance from one another planes of the core element (9) are penetrated with seams (18) made of fiber composite material.
    [12]
    12. control surface element (1) according to one of claims 8 to 11, characterized in that the seams (18) made of fiber composite material in a deviating from 90 ° angle of preferably between 30 and 60 °, in particular of substantially 45 °, to the upper or underside of the core element (9) are arranged.
    [13]
    13. Control surface element (1) one of claims 8 to 12, characterized in that the core element (9) is provided at a trailing edge with a substantially in the longitudinal direction of the upper outer skin member (2) extending reinforcing structure (19) which by further seams ( 19) is formed from fiber composite material.
    [14]
    14. Control surface element (1) according to one of claims 1 to 13, characterized in that for forming the reinforcing rib (8) from the core element (9) separate foam element (20) is provided, which is provided with seams (18) made of fiber composite material.
    [15]
    15. Control surface element (1) according to claim 14, characterized in that the foam element (20) of the reinforcing rib (8) consists of a foam material of the core element different foam or of the same foam material, with a higher density compared to it.
    [16]
    16. Control surface element (1) according to one of claims 1 to 15, characterized in that the upper outer skin element (2), the lower outer skin element (3) and the at least one reinforcing rib (8) made of fiber composite material, in particular carbon fiber reinforced plastic, consist, wherein the upper outer skin element (2), the at least one reinforcing rib (8) and the lower outer skin element (3) are interconnected via the plastic of the fiber composite material.
    [17]
    17. Control surface element (1) according to one of claims 1 to 16, characterized in that the foam material of the core element (9) is formed from polymethacrylimide.
    [18]
    18. A method for producing a control surface element (1), in particular a spoiler, wherein an upper outer skin element (2) is connected to a lower outer skin element (3), wherein at least one reinforcing rib (8) is formed, wherein a core element (9) consists of a Foam material is provided, characterized in that the reinforcing rib (8) between two core segments (10) of the core element (9) is formed.
    [19]
    19. The method according to claim 18, characterized in that a semi-finished fiber product for forming the upper outer skin element (2), the lower outer skin element (3) and the at least one reinforcing rib (8) in the dry state on the core element (9) and then arranged with a Plastic is saturated in the liquid state.
    [20]
    20. The method according to claim 19, characterized in that the semi-finished fiber product (22) by means of a film (26) in an infusion space (25) is arranged with at least one feed line (30) for the plastic in the liquid state and with at least one vacuum line (32) is connected, wherein by applying a negative pressure to the vacuum line (32) the plastic is sucked in the liquid state, wherein the semifinished fiber product (22) for forming the upper outer skin element (2), the lower outer skin element (3) and the at least one Reinforcing rib (8) is impregnated.
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    同族专利:
    公开号 | 公开日
    WO2016168879A1|2016-10-27|
    CA2982616A1|2016-10-27|
    CN107645984A|2018-01-30|
    US20180127083A1|2018-05-10|
    CA2982616C|2020-02-04|
    AT517198B1|2021-12-15|
    BR112017021624A2|2018-07-03|
    EP3286078A1|2018-02-28|
    CN107645984B|2020-08-18|
    EP3286078B1|2022-02-09|
    RU2682392C1|2019-03-19|
    US10562607B2|2020-02-18|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50332/2015A|AT517198B1|2015-04-24|2015-04-24|Control surface element for an airplane|ATA50332/2015A| AT517198B1|2015-04-24|2015-04-24|Control surface element for an airplane|
    PCT/AT2016/050107| WO2016168879A1|2015-04-24|2016-04-22|Control surface element|
    CN201680023737.2A| CN107645984B|2015-04-24|2016-04-22|Actuating surface element|
    EP16720996.4A| EP3286078B1|2015-04-24|2016-04-22|Control surface element|
    RU2017140727A| RU2682392C1|2015-04-24|2016-04-22|Steering surface element|
    CA2982616A| CA2982616C|2015-04-24|2016-04-22|Control surface element|
    US15/569,046| US10562607B2|2015-04-24|2016-04-22|Control surface element|
    BR112017021624-8A| BR112017021624A2|2015-04-24|2016-04-22|control surface element|
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