阅读说明：本技术 一种飞机机翼后缘复合材料隔框结构及其制作方法 (Composite material bulkhead structure of aircraft wing trailing edge and manufacturing method thereof ) 是由 李森 司超超 薛佼 崔孝展 于 2019-10-25 设计创作，主要内容包括：一种飞机机翼后缘复合材料隔框结构及制造方法,隔框结构的前端与机翼盒段连接,隔框结构的两侧与活动翼面相邻,所述的隔框结构是一种复合材料一体成型的楔形悬臂结构,其前端有开敞的空腔,两侧与活动翼面平行,隔框结构含有外面板和隔框芯,外面板包覆隔框芯形成一体结构,外面板的上下表面为机翼的理论外形,所述的隔框芯含有内面板和泡沫芯,所述的内面板位于隔框结构的前段,是一个前端开敞的梯形框,与隔框结构的前端空腔外形匹配,所述的泡沫芯位于隔框结构的后段,是一个用泡沫芯制作的梯形台,泡沫芯的前端与内面板的后端相贴合。(The front end of the bulkhead structure is connected with a wing box section, two sides of the bulkhead structure are adjacent to movable wing surfaces, the bulkhead structure is a wedge-shaped cantilever structure integrally formed by composite materials, an open cavity is formed in the front end of the bulkhead structure, two sides of the bulkhead structure are parallel to the movable wing surfaces, the bulkhead structure comprises an outer panel and a bulkhead core, the outer panel coats the bulkhead core to form an integrated structure, the upper surface and the lower surface of the outer panel are in the theoretical appearance of the wing, the bulkhead core comprises an inner panel and a foam core, the inner panel is positioned at the front section of the bulkhead structure, is a trapezoidal frame with an open front end and is matched with the appearance of the cavity at the front end of the bulkhead structure, the foam core is positioned at the rear section of the bulkhead structure and is a trapezoidal table made of the foam core, and the front end of the foam core is attached to the rear end of the inner panel.)

1. The utility model provides an aircraft wing trailing edge combined material bulkhead structure, the front end of bulkhead structure is connected with the wing box section, and the both sides of bulkhead structure are adjacent with the activity airfoil, its characterized in that, the bulkhead structure be a combined material integrated into one piece's wedge cantilever structure, its front end has the cavity that opens, both sides are parallel with the activity airfoil, the bulkhead structure contains outer panel and bulkhead core, outer panel cladding bulkhead core forms an organic whole structure, the upper and lower surface of outer panel is the theoretical appearance of wing, the bulkhead core contain interior panel and foam core, the anterior segment that the interior panel is located the bulkhead structure, is a trapezoidal frame that the front end opens, matches with the front end cavity appearance of bulkhead structure, the foam core be located the back end of bulkhead structure, be a trapezoidal platform of making with the foam core, the front end of foam core is laminated with the back end of interior panel.

2. An aircraft wing trailing edge composite bulkhead structure according to claim 1, wherein the rear end of the bulkhead core is further provided with a glass reinforced plastic block, the glass reinforced plastic block is attached to the foam core, and the outer side of the glass reinforced plastic block is matched with the shape of the rear end of the bulkhead structure.

3. An aircraft wing trailing edge composite bulkhead structure according to claim 1, wherein the inner wall of the cavity at the forward end of the bulkhead structure is of laminate construction and serves as a connection area for the cantilevered bulkhead structure.

4. An aircraft wing trailing edge composite bulkhead structure according to claim 1, 2 or 3, wherein the cantilevered bulkhead structure is applied between adjacent moving airfoils, the forward side of the wing nose being connected to the upper panel, the lower panel and the back spar of the airfoil box section by connecting joints to provide support for the adjacent moving airfoil rubber profile compression seals.

5. The method for manufacturing the composite material bulkhead structure at the trailing edge of the airplane wing as claimed in claim 4, wherein 1) the size of the inner cavity of the inner panel and the structural sizes of the foam core and the glass fiber reinforced plastic block are inwards calculated according to the theoretical shape of the wing and the thicknesses of the laminated plates of the outer panel and the inner panel, 2) the foam core and the glass fiber reinforced plastic block are manufactured by a machining method, and a tooling die is used for male die paving of the inner panel; 3) assembling and fixing the paved inner panel, the foam core and the glass fiber reinforced plastic by using a tooling fixture to form a partition frame core; 4) and then, paving and pasting the paving layer of the outer panel around the partition frame core consisting of the inner panel, the foam core and the glass fiber reinforced plastic to form a composite material integrated structure.

6. The method for manufacturing the composite material bulkhead structure at the trailing edge of the airplane wing as claimed in claim 5, wherein in the step 4), the outer panel layer is firstly paved around the bulkhead core to obtain the prefabricated forming part of the bulkhead structure, then the prefabricated forming part is formed by a vacuum assisted resin transfer molding method, the prefabricated forming part is packaged and vacuumized, when a certain vacuum degree is reached, resin is injected into the packaged prefabricated forming part and is heated, so that the inner panel, the foam core, the glass fiber reinforced plastic and the outer panel are fully cured by the resin to form a composite material, and finally the demolded composite material integral structural part is machined to manufacture the cantilever type bulkhead structure at the trailing edge of the composite material wing, which meets the design requirements and meets the functional requirements.

7. A method of making an aircraft wing trailing edge composite bulkhead structure according to claim 6, wherein in step 4) the plies are cross lapped on the upper and lower surfaces of the foam core as the outer skin is laid.

Technical Field

The application relates to an aircraft design and manufacturing technology, in particular to an aircraft wing trailing edge composite material bulkhead structure and a manufacturing method thereof.

Background

The bulkhead structure is a cantilever type structure which is connected with a wing box section on the front side of the aircraft and is flush with the tail part of the movable wing surface on the rear side, and the bulkhead structure is mainly used for maintaining the aerodynamic shape of the wing profile, reducing the airflow resistance and providing support for the extrusion sealing of rubber profiles on the end surfaces of the movable wing surfaces. Because the height of the back beam of the airplane wing is high, and the aerodynamic profile height of the tail part of the wing is generally low, the bulkhead structure has violent change along the course profile height, more complex profile, smaller span-wise width and more gradual change along the wing profile span-wise direction.

Disclosure of Invention

In order to overcome the defects in the prior art, the composite cantilever type bulkhead structure and the manufacturing method thereof have the advantages that the structure is simple and reasonable, the structure weight and the manufacturing cost are reduced, the structural efficiency of an airplane is improved, and the service life of the airplane is prolonged.

The utility model provides an aircraft wing trailing edge combined material bulkhead structure, the front end of bulkhead structure is connected with the wing box section, and the both sides of bulkhead structure are adjacent with the activity airfoil, its characterized in that, the bulkhead structure be a combined material integrated into one piece's wedge cantilever structure, its front end has the cavity that opens, both sides are parallel with the activity airfoil, the bulkhead structure contains outer panel and bulkhead core, outer panel cladding bulkhead core forms an organic whole structure, the upper and lower surface of outer panel is the theoretical appearance of wing, the bulkhead core contain interior panel and foam core, the anterior segment that the interior panel is located the bulkhead structure, is a trapezoidal frame that the front end opens, matches with the front end cavity appearance of bulkhead structure, the foam core be located the back end of bulkhead structure, be a trapezoidal platform of making with the foam core, the front end of foam core is laminated with the back end of interior panel.

The rear end of the partition frame core is also provided with a glass fiber reinforced plastic block, the glass fiber reinforced plastic block is attached to the foam core, and the outer side surface of the glass fiber reinforced plastic block is matched with the shape of the rear end of the partition frame structure.

The inner wall of the cavity at the front end of the partition frame structure is of a laminated plate structure and is used as a connecting area of the cantilever type partition frame structural member.

The cantilever type bulkhead structure is applied between adjacent movable airfoil surfaces, and the course front side is connected with the upper wall plate, the lower wall plate and the back beam of the airfoil surface box section through the connecting joints to provide support for compression sealing of rubber profiles of the adjacent movable airfoil surfaces.

The application also provides a manufacturing method of the aircraft wing trailing edge bulkhead structure, 1) the size of an inner side cavity of the inner panel and the structural sizes of the foam core and the glass fiber reinforced plastic block are inwards calculated according to the theoretical appearance of the wing and the thicknesses of laminated plates of an outer panel and an inner panel of the aircraft wing trailing edge bulkhead structure, 2) the foam core and the glass fiber reinforced plastic block are manufactured by using a machining method, and a tooling die is used for male die paving on the inner panel; 3) assembling and fixing the paved inner panel, the foam core and the glass fiber reinforced plastic by using a tooling fixture to form a partition frame core; 4) and then, paving and pasting the paving layer of the outer panel around the partition frame core consisting of the inner panel, the foam core and the glass fiber reinforced plastic to form a composite material integrated structure.

In the step 4), firstly, paving and pasting the outer panel layer around the bulkhead core to obtain a bulkhead structure prefabricated forming part, then forming by adopting a vacuum-assisted resin transfer molding method, packaging and vacuumizing the prefabricated forming part, injecting resin into the packaged prefabricated forming part and heating when a certain vacuum degree is reached, so that the inner panel, the foam core, the glass fiber reinforced plastic and the outer panel form a composite material after the resin is fully cured, and finally, machining the demolded composite material integral structural part to prepare the composite material wing trailing edge cantilever type bulkhead structure which meets the design requirements and meets the functional requirements.

In the step 4), when the outer panel is paved, the paved layer is subjected to cross lapping treatment on the upper surface and the lower surface of the foam core.

The beneficial effect of this application lies in: the composite material wing trailing edge cantilever type bulkhead structure is simple in structural form, the weight and the production cost of the bulkhead structure are reduced, the structural efficiency and the service life of an airplane are improved, the structural rigidity is high, the stability is good, and the structure is safe and reliable.

The present application is described in further detail below with reference to the accompanying drawings of embodiments.

Drawings

FIG. 1 is a schematic view of the structural configuration of the composite bulkhead at the trailing edge of the aircraft wing of the present application.

FIG. 2 is a cross-sectional view of an aircraft wing trailing edge composite bulkhead structure according to the present application.

FIG. 3 is a schematic illustration of an outer panel layup of an aircraft wing trailing edge composite bulkhead structure according to the present application.

FIG. 4 is a schematic illustration of the use of the composite bulkhead structure of the aircraft trailing edge of the present application.

The numbering in the figures illustrates: 1 bulkhead structure, 2 inner panels, 3 foam cores, 4 glass fiber reinforced plastic blocks, 5 outer panels, 6 upper wall plates, 7 lower wall plates, 8 back beams, 9 connecting joints, 10 movable wing surfaces, 11 rubber profiles and 12 movable wing surfaces.

Detailed Description

Referring to the drawings, as shown in fig. 1 to 4, the composite material bulkhead structure at the trailing edge of an aircraft wing provided by the present application, the front end of the bulkhead structure 1 is connected with a wing box section, two sides of the bulkhead structure 1 are adjacent to a movable wing surface 10 and a movable wing surface 12, the bulkhead structure 1 is an integrally formed wedge-shaped cantilever structure made of a composite material, the front end of the bulkhead structure has an open cavity, two sides of the bulkhead structure are parallel to the movable wing surfaces, the bulkhead structure 1 comprises an outer panel 5 and a bulkhead core, the outer panel 5 covers the bulkhead core to form an integrated structure, the upper and lower surfaces of the outer panel 5 are the theoretical shape of the wing, the bulkhead core comprises an inner panel 2 and a foam core 3, the inner panel 2 is located inside the front section of the bulkhead structure 1, is a trapezoid frame with an open front end and is matched with the shape of the front end cavity of the bulkhead structure 2, the foam core 3 is located inside the rear section of the bulkhead structure 1, is a trapezoidal table made of a foam core, and the front end of the foam core is attached to the rear end of the inner panel.

In order to facilitate the paving and pasting of the outer panel and ensure the strength of the rear end of the spacer frame structure, the rear end of the spacer frame core is also provided with a glass fiber reinforced plastic block 4, the glass fiber reinforced plastic block 4 is attached to the foam core 3, and the outer side surface of the glass fiber reinforced plastic block 4 is matched with the shape of the rear end of the spacer frame structure 1.

The inner panel 2, the foam core 3 and the glass fiber reinforced plastic block 4 jointly form a partition frame core of a partition frame structure.

The composite material bulkhead structure of the aircraft wing trailing edge is made of composite materials, and can be formed by a prepreg/autoclave forming method or a vacuum assisted resin transfer molding (VARI) method. Compared with a prepreg/autoclave forming method, the vacuum assisted resin transfer molding forming method is adopted to form, so that the manufacturing cost of parts can be greatly reduced.

In the specific operation process, the size of the inner cavity of the inner panel 2 and the structural sizes of the foam core 3 and the glass fiber reinforced plastic block 4 are inwards calculated according to the theoretical appearance of the wing and the thicknesses of the laminated plates of the outer panel 5 and the inner panel 2, so that a corresponding tool mold and a corresponding fixture frame are manufactured, and the foam core 3 and the glass fiber reinforced plastic block 4 are manufactured by using a machining method. The composite material wing trailing edge cantilever type partition frame structure provided by the invention adopts a composite material sandwich structure, a tool mould is used for male mould paving and pasting of an inner panel 2, then a tool mould frame is used for assembling and fixing the paved inner panel 2, a foam core 3 and glass fiber reinforced plastic 4, and then an outer panel 5 is paved and pasted around the inner panel 2, the foam core 3 and the glass fiber reinforced plastic 4 to prepare a prefabricated forming part of the partition frame structure. In order to reduce the manufacturing cost, the prefabricated forming part is preferably formed by adopting a vacuum-assisted resin transfer molding method, the prefabricated forming part is packaged and vacuumized, resin is injected when the prefabricated forming part reaches a certain vacuum degree, the resin is heated after the resin is fully flowed, soaked and permeated, the inner panel 2, the foam core 3, the glass fiber reinforced plastic 4 and the outer panel 5 form a composite material integral structural part after the resin is fully cured in the period, then demoulding is carried out, and the composite material partition frame structure forming part is mechanically processed to manufacture the composite material wing trailing edge cantilever type partition frame structure body 1 which meets the design requirements and meets the functional requirements.

FIG. 1 illustrates a preferred embodiment of the aircraft trailing edge composite bulkhead structure of the present application. The upper surface and the lower surface of the bulkhead structure 1 are in the theoretical shape of a wing, the left side and the right side of the bulkhead structure are parallel to the end face of the movable wing surface, and a cavity at the front side is in a laminated plate structure and serves as a connecting area of a cantilever type bulkhead structural member.

FIG. 2 illustrates a cross-sectional view of an aircraft wing trailing edge composite bulkhead structure according to the present application. The outer panel 5 is cured and connected with the inner panel 2, the foam core 3 and the glass fiber reinforced plastic block 4 into an integral structure.

FIG. 3 is a schematic illustration of an outer panel layup of an aircraft wing trailing edge composite bulkhead structure according to the present application. According to a feasible layering schematic diagram of a sandwich area of a composite material bulkhead structure at the trailing edge of the wing, layering is carried out on the upper surface and the lower surface of the foam core 3 in a lap joint mode.

Fig. 4 is a schematic view illustrating a use state of the composite material bulkhead structure of the aircraft wing trailing edge of the application. The bulkhead structure 1 is applied between a movable airfoil 10 and a movable airfoil 12, and the heading front side is connected with an upper wall plate 6, a lower wall plate 7 and a back beam 8 of an airfoil box section through a connecting joint 9, so as to separate the movable airfoil 10 from the movable airfoil 12 and provide support for the compression sealing of a rubber profile 11 of the movable airfoil 10. The cantilever type bulkhead structure 1 and the connecting joint 9 can be connected in various modes such as screwing, riveting, gluing and the like, and necessary anticorrosion treatment is carried out on the contact surface.

To sum up, the composite material bulkhead structure of aircraft wing trailing edge that this application provided adopts combined material to make, has that fatigue strength is good, rigidity is high, anticorrosive characteristics, has reduced bulkhead structure's weight and manufacturing cost, has improved structural efficiency and life to use the maintenance cost also can reduce. In addition, the vacuum-assisted resin transfer molding process can greatly reduce the manufacturing cost of parts.

While specific embodiments of the composite bulkhead structure for the trailing edge of an aircraft wing of the present application have been described in detail, it is not intended to be limiting and any simple modifications of the above embodiments based on the technical spirit of the present application are within the technical scope of the present application.