阅读说明：本技术 一种仿细胞式气柱机翼蒙皮 (Cell-like air column wing skin ) 是由 周洲 王贤 王正平 于 2019-09-30 设计创作，主要内容包括：一种仿细胞式气柱机翼蒙皮包括前缘蒙皮、翼盒蒙皮、后缘蒙皮和翼尖蒙皮；翼盒蒙皮位于机翼中部,其前后分别与前缘蒙皮和后缘蒙皮固定连接,其翼尖一端通过所述翼尖蒙皮封闭,另一端与机身固定连接；所述翼盒蒙皮包括前梁、后梁、上蒙皮和下蒙皮；上蒙皮和下蒙皮的前端均与前梁固定连接,后端均与后梁连接；前梁与前缘蒙皮外缘连接,后梁与所述后缘蒙皮外缘连接；前梁、后梁、上蒙皮和下蒙皮都是结构相同的气柱蒙皮；气柱蒙皮由外壳、内壳和若干气柱组成。本发明利用气体传递载荷,使结构整体均匀受力；机翼内部中空,可充分利用；采用前后梁垂直气柱蒙皮代替传统梁结构,减轻了结构重量,前后梁垂直气柱与翼尖垂直气柱有利于机翼翼型的定型。(A cell-like air column wing skin comprises a front edge skin, a wing box skin, a rear edge skin and a wing tip skin; the wing box skin is positioned in the middle of the wing, the front and the back of the wing box skin are respectively and fixedly connected with the front edge skin and the rear edge skin, one end of the wing tip of the wing box is sealed by the wing tip skin, and the other end of the wing tip is fixedly connected with the fuselage; the wing box skin comprises a front beam, a rear beam, an upper skin and a lower skin; the front ends of the upper skin and the lower skin are fixedly connected with the front beam, and the rear ends of the upper skin and the lower skin are connected with the rear beam; the front beam is connected with the outer edge of the front edge skin, and the rear beam is connected with the outer edge of the rear edge skin; the front beam, the rear beam, the upper skin and the lower skin are all air column skins with the same structure; the air column skin consists of an outer shell, an inner shell and a plurality of air columns. The invention utilizes gas to transfer load, so that the whole structure is uniformly stressed; the wing is hollow, and can be fully utilized; the front and rear beam vertical air column skin is adopted to replace the traditional beam structure, the structure weight is reduced, and the front and rear beam vertical air column and the wing tip vertical air column are beneficial to shaping of wing profiles.)

1. A cell-like air column wing skin comprises a front edge skin, a wing box skin, a rear edge skin and a wing tip skin; the front edge skin and the rear edge skin are both shell structures; the wing box skin is positioned in the middle of the wing, the front and the back of the wing box skin are respectively and fixedly connected with the front edge skin and the rear edge skin, one end of the wing tip of the wing box skin is sealed by the wing tip skin, and the other end of the wing tip is fixedly connected with the fuselage; the method is characterized in that: the wing box skin comprises a front beam, a rear beam, an upper skin and a lower skin; the front ends of the upper skin and the lower skin are fixedly connected with the front beam, and the rear ends of the upper skin and the lower skin are connected with the rear beam; the front beam is fixedly connected with the upper and lower straight outer edges of the front edge skin, and the rear beam is fixedly connected with the upper and lower straight outer edges of the rear edge skin;

the front beam, the rear beam, the upper skin and the lower skin are all air column skins with the same structure; the air column skin consists of an outer shell, an inner shell and a plurality of air columns, the air columns are connected side by side to form a plane, and the upper surface and the lower surface of the air column skin are respectively attached with the wavy outer shell and the wavy inner shell; the air column skin of the upper skin and the lower skin is called a spanwise air column skin, and the air column skin of the front beam and the rear beam is called a vertical air column skin; the axial direction of the spanwise air column skin is parallel to the spanwise direction of the wing, and the vertical air column skin is perpendicular to the spanwise air column skin;

the positions of the wingtip skin, the front edge skin and the rear edge skin corresponding to each other are of a shell structure, and the positions of the wingbox skin corresponding to each other are of an air column skin; the air column skin on the wingtip skin is a vertical air column skin.

2. The simulated cell air column wing skin of claim 1, wherein: the air column is an inflatable air bag with a columnar structure.

3. The simulated cell air column wing skin of claim 1, wherein: the outer shell and the inner shell are both made of PET plastics, and the film of the air column is a PA + PE co-extrusion film.

4. The simulated cell air column wing skin of claim 1, wherein: the wing box has a front spar at 12% of the wing chord length and a rear spar at 75% of the wing chord length.

5. The simulated cell air column wing skin of claim 1, wherein: the longitudinal section of the air column skin is 8mm multiplied by 6mm in an oval shape, and the internal air pressure of the air column is 0.06-0.08 MPa.

Technical Field

The invention belongs to the field of airplane structure design, and particularly relates to a cell-like air column wing skin.

Background

The light flexible skin is one of key technologies for realizing the morphing aircraft, and the wing needs to ensure that the skin can bear enough deformation if the wing needs to realize large-amplitude changes of chord length, span length, sweep angle, area and the like, and has enough out-of-plane rigidity in the deformation process to maintain the aerodynamic shape of the wing and bear aerodynamic load in the flight process; while having as little in-plane stiffness as possible to reduce the energy requirements of the driver.

The structure and performance of biological materials provide the design inspiration of light flexible skin structures for people, and researches on the biological materials and bionics thereof increasingly become important research fields in material science and engineering science. Organisms always evolve in the direction most beneficial to the development of the organisms, the design of products by utilizing the bionic technology can often break through the bottleneck in the existing engineering design, the traditional thought is broken through, a new design thought is obtained, and finally products with excellent performance are obtained.

The traditional wing follows the concept of function determination form, the structure is complex due to the fact that components such as beams, ribs and skins are adopted to bear and transfer loads, and the Chinese invention patent CN108622369A discloses a 'morphing aircraft wing structure' which comprises a wing spar system, a wing rib system, a flexible skin controller support structure, a flexible skin controller and a flexible skin. The inflatable structure can realize the integral stress of the wing, and has the characteristics of simple principle, flexible design, light structure weight, low manufacturing cost and the like. The inflatable structure is a bag structure made of flexible materials, and the application of the existing inflatable structure on the wing is that the wing is integrally inflated, namely the inflatable wing mainly comprises a multi-air-beam integral inflatable wing and a multi-tube inflatable wing, for example, a twistable inflatable wing structure and a design method thereof disclosed in Chinese patent CN 109533280A; lvqiang et al (Lvqiang, Yezhengyin, Lidong, design and experimental study of wings of inflatable structure [ J ] flight mechanics, 2007, 25 (4): 77-80.) mention that the problem of weak anti-damage capability of the whole inflatable wings is caused, and if a certain point is damaged, the use of the whole wings is seriously influenced.

Disclosure of Invention

The technical problem to be solved is as follows:

in order to avoid the defects of the prior art, the invention provides a cell-like air column wing skin structure which has higher bending rigidity in the wingspan direction and can bear aerodynamic load; the chord-direction air columns of the wings are closely arranged, and the vertical air columns of the front and rear beams and the vertical air columns of the wing tips exist, so that the integral torsion resistance of the wings is improved; from the airfoil section, the height of the skin structure is increased on the premise of not increasing the weight of the air column structure, and the integral shear resistance is improved. In addition, the wing skin structure can improve the damage resistance of the wing while realizing the integral stress of the wing.

The technical scheme of the invention is as follows: a cell-like air column wing skin comprises a front edge skin, a wing box skin, a rear edge skin and a wing tip skin; the front edge skin and the rear edge skin are both shell structures; the wing box skin is positioned in the middle of the wing, the front and the back of the wing box skin are respectively and fixedly connected with the front edge skin and the rear edge skin, one end of the wing tip of the wing box skin is sealed by the wing tip skin, and the other end of the wing tip is fixedly connected with the fuselage; the method is characterized in that: the wing box skin comprises a front beam, a rear beam, an upper skin and a lower skin; the front ends of the upper skin and the lower skin are fixedly connected with the front beam, and the rear ends of the upper skin and the lower skin are connected with the rear beam; the front beam is fixedly connected with the upper and lower straight outer edges of the front edge skin, and the rear beam is fixedly connected with the upper and lower straight outer edges of the rear edge skin;

the front beam, the rear beam, the upper skin and the lower skin are all air column skins with the same structure; the air column skin consists of an outer shell, an inner shell and a plurality of air columns, the air columns are connected side by side to form a plane, and the upper surface and the lower surface of the air column skin are respectively attached with the wavy outer shell and the wavy inner shell; the air column skin of the upper skin and the lower skin is called a spanwise air column skin, and the air column skin of the front beam and the rear beam is called a vertical air column skin; the axial direction of the spanwise air column skin is parallel to the spanwise direction of the wing, and the vertical air column skin is perpendicular to the spanwise air column skin;

the positions of the wingtip skin, the front edge skin and the rear edge skin corresponding to each other are of a shell structure, and the positions of the wingbox skin corresponding to each other are of an air column skin; the air column skin on the wingtip skin is a vertical air column skin.

The further technical scheme of the invention is as follows: the air column is an inflatable air bag with a columnar structure.

The further technical scheme of the invention is as follows: the outer shell and the inner shell are both made of PET plastics, and the film of the air column is a PA + PE co-extrusion film.

The further technical scheme of the invention is as follows: the wing box has a front spar at 12% of the wing chord length and a rear spar at 75% of the wing chord length.

The further technical scheme of the invention is as follows: the longitudinal section of the air column skin is 8mm multiplied by 6mm in an oval shape, and the internal air pressure of the air column is 0.06-0.08 MPa.

Advantageous effects

The invention has the beneficial effects that:

1) the invention is a kind of imitating cell type air column wing skin structure, utilize the gas to transmit the load, make the structure bear the force evenly wholly, in addition compared with existing inflatable wing, the wing of the invention is basically hollow inside, can fully utilize the internal space of wing; the front and rear beam vertical air column skin is adopted to replace the traditional beam structure, the structure weight is reduced, and the existence of the front and rear beam vertical air column and the wing tip vertical air column is beneficial to shaping and maintaining the wing profile.

2) The spanwise air column, the vertical air column and the wavy inner and outer shells can play a role in increasing the spanwise rigidity of the skin structure, so that the structure can bear larger load, and the vertical air column is also beneficial to maintaining wing profiles; the gas in each spanwise gas column is independent and not communicated with each other, so that the overall anti-damage capability is improved.

3) The wavy inner shell and the wavy outer shell can directly extrude the air column in the middle, the air column film is tightly adhered to the inner shell and the outer shell, the damage resistance of the air column is improved, and the unfolding rigidity of the skin structure is improved.

4) The air column is directly extruded between the outer shell and the inner shell, the skin structure is compact, and other connecting parts are not needed.

Drawings

FIG. 1 is an overall schematic view of the cell-like air column wing skin structure of the present invention;

FIG. 2 is a schematic view of a cell-like airfoil skin structure according to the present invention;

FIG. 3 is a schematic view of an inner shell of the cell-like air column wing skin structure of the present invention;

FIG. 4 is a schematic cross-sectional view of the structure of the cell-like air column wing skin according to the present invention;

FIG. 5 is a partial enlarged view of the portion A of the cell-like air column wing skin structure of the present invention.

Description of reference numerals: 1-spanwise gas column skin; 2-vertical air column skin of wingtip skin; 3-vertical air column skin of the front beam; 4-vertical air column skin of the back beam; 5-a skin-over shell; 6-wingtip shell; 7-leading edge skin; 8-trailing edge skin; 9-the outer shell of the front beam; 10-the outer shell of the back rest; 11-inner shell of upper skin; 12-inner shell of wingtip; 13-inner shell of front beam; 14-inner shell of rear beam; 15-column air; 16-gas column membrane.

Detailed Description

The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

The cell-like air column wing skin comprises a front edge skin 7, a wing box skin, a rear edge skin 8 and a wing tip skin; the front edge skin 7 and the rear edge skin 8 are both shell structures; the wing box skin is positioned in the middle of the wing, the front and the back of the wing box skin are respectively and fixedly connected with the front edge skin 7 and the rear edge skin 8, one end of the wing tip of the wing box skin is sealed by the wing tip skin, and the other end of the wing tip is fixedly connected with the fuselage;

the wing box skin comprises a front beam, a rear beam, an upper skin and a lower skin; the front ends of the upper skin and the lower skin are fixedly connected with the front beam, and the rear ends of the upper skin and the lower skin are connected with the rear beam; the upper end and the lower end of the front beam are respectively connected with the upper straight line outer edge and the lower straight line outer edge of the front edge skin, and the upper end and the lower end of the rear beam are respectively connected with the upper straight line outer edge and the lower straight line outer edge of the rear edge skin;

the front beam, the rear beam, the upper skin and the lower skin are all air column skins with the same structure; the air column skin consists of an outer shell, an inner shell and a plurality of air columns, and the air columns are inflatable air bags with columnar structures; the air columns are connected side by side to form a plane, the shapes of the upper surface and the lower surface of the air columns are similar to a wave shape, and a wave-shaped outer shell and a wave-shaped inner shell are respectively attached to the upper surface and the lower surface of the air columns; the air column skin of the upper skin and the lower skin is called a spanwise air column skin 1, and the air column skin of the front beam and the rear beam is called a vertical air column skin; the axial direction of the spanwise air column skin 1 is parallel to the spanwise direction of the wing, and the vertical air column skin is perpendicular to the spanwise air column skin; the outer shell and the inner shell are both made of PET plastics, and the film of the air column is a PA + PE co-extrusion film.

The wing tip skin, the front edge skin 7 and the rear edge skin 8 correspond to a shell structure made of PET plastic, and the wing box skin corresponds to an air column skin; the air column skin on the wingtip skin is a vertical air column skin.

This concrete embodiment adopts NACA0012 wing section, chord length 300mm, and exhibition length 600mm, and the perpendicular air column of front beam is located the wing chord length 12% department, and the perpendicular air column of back beam is located the wing chord length 75% department, and the air column section is 8mm 6 mm's ellipse, and the inside atmospheric pressure of air column is about 0.06 ~ 0.08 MPa.

FIG. 1 is an overall schematic diagram of the cell-like air column wing skin structure of the invention, wherein single-layer spanwise air column skins 1 are respectively arranged on the upper and lower surfaces of the middle part of the wing along the chord direction, a row of vertical air column skins 2 are arranged at the wing tip, a front-girder vertical air column skin 3 and a rear-girder vertical air column skin 4 are arranged in the wing, and the existence of the vertical air column skins is beneficial to maintaining the aerodynamic shape of the wing and simultaneously enhances the overall torsion resistance of the structure.

Fig. 2 is a schematic diagram of the shape of the shell of the cell-like air column wing skin structure of the invention, and the whole shell is an integral body consisting of a shell 5 of a corrugated upper skin, a shell of a lower skin, a shell 6 of a wing tip, a leading edge skin 7, a trailing edge skin 8, a shell 9 of a front beam and a shell 10 of a rear beam on the upper and lower surfaces of the middle part of the wing. The wavy shell shapes of the upper skin and the lower skin further improve the spanwise rigidity of the wing, and meanwhile, the damage resistance of the structure is enhanced.

Fig. 3 is a schematic diagram of the shape of the inner shell of the cell-like air column wing skin structure of the invention, and the whole inner shell consists of an inner shell 11 of the upper skin of the wing, an inner shell of the lower skin, an inner shell 12 of the wingtip, an inner shell 13 of the front spar and an inner shell 14 of the rear spar, and the whole shape is similar to the shape of the middle part of the outer shell. The outer shell and the inner shell directly extrude the air column between the two to form the cell-like air column wing skin structure.

FIG. 4 is a schematic view of an airfoil section of the cell-like air column wing skin structure of the present invention, wherein the gas between the spanwise air columns is not communicated, and the whole structure will not fail even if a single air column is damaged.

Fig. 5 is a partial enlarged view of the structure shown at a in fig. 4, in which the air column consisting of air 15 and air column membrane 16 is pressed in between by the outer and inner shells, and the air column membrane 16 is closely attached to both the outer and inner shells. In order to ensure the smoothness of the surface of the wing and the requirement of aerodynamic shape, a conformal film can be added on the outer surface of the shell.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.