CN218317282U

CN218317282U - Unmanned aerial vehicle wing foam presss from both sides core wallboard

Info

Publication number: CN218317282U
Application number: CN202222674380.XU
Authority: CN
Inventors: 党敏; 李嘉玺; 韩宝钰; 吉飞
Original assignee: AVIC First Aircraft Institute
Current assignee: AVIC First Aircraft Institute
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-01-17
Anticipated expiration: 2032-10-11

Abstract

The utility model belongs to aircraft structural design field, concretely relates to unmanned aerial vehicle wing foam sandwich wallboard, it comprises last wallboard 1, lower wallboard 2, is foam sandwich structure, and the design of 2 borders of lower wallboard sinks and supplies 1 overlap joints of wallboard and glue with it, has so both reduced the quantity of belted plate part and has realized subtracting the weight again. The foam sandwich of the upper wall plate 1 is divided into five blocks, and the foam sandwich with different heights and different densities is adopted after the optimized design, so that the design requirement is met and the weight reduction effect is achieved; the lower wall plate 2 is only provided with a foam sandwich in the oil tank area; due to the limitation of airfoil height and space at the rear edge of the lower wall plate, in order to improve the stability of the lower wall plate, an L-shaped piece is specially bonded to improve the stability; seven maintenance flaps are arranged on the lower wall plate, and in order to reduce the number of parts with plates and reduce weight, sunken flanges are designed at the wall plate opening frame and used for flap connection.

Description

Unmanned aerial vehicle wing foam presss from both sides core wallboard

Technical Field

This application belongs to aircraft structural design field, concretely relates to unmanned aerial vehicle wing foam presss from both sides core wallboard.

Background

The wing sandwich wall plate consists of an upper wall plate and a lower wall plate. The sandwich structure consists of an outer panel, an inner panel and a sandwich. Generally, the same sandwich structure is adopted during design, so that the manufacturing difficulty is reduced, but the designability of the composite material is not maximized, and the weight control and the cost reduction are not facilitated.

Typically, to achieve the assembled relationship of two components (e.g., upper and lower wall panels), the two are connected by a strap, which adds both additional components and weight.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, this application provides an unmanned aerial vehicle wing foam presss from both sides core wallboard, includes: the upper wall plate and the lower wall plate are of a double-layer structure formed by laminating an outer panel and an inner panel, and are fixedly bonded by glue, so that the number of parts with plates can be reduced and the weight can be reduced by adopting the glue for fixing and bonding;

the upper wall plate is divided into a front section, a middle section and a rear section from the front edge to the rear edge of the flap, and a fourth foam sandwich is arranged between an outer panel and an inner panel of the front section; a first foam sandwich, a second foam sandwich and a third foam sandwich are sequentially arranged between the outer panel and the inner panel of the middle section along the unfolding direction;

the outer panel and the inner panel in the middle of the lower wall plate are provided with a fifth foam sandwich.

Preferably, the lower wall plate has a recess at the connection with the upper wall plate, and the upper wall plate overlaps the lower wall plate at the recess and is adhesively fixed.

Preferably, the rear edge of the lower wall plate 2 cannot be provided with other structures due to the limitation of airfoil height and space, and in order to improve the stability of the lower wall plate 2, a reinforcing rib is bonded to the rear edge of the inner panel of the lower wall plate along the spanwise direction; the reinforcing ribs are L-shaped angle pieces.

Preferably, go up the wallboard and all have a plurality of wallboard mouthful frames with wallboard down, detachable maintenance flap is installed to wallboard mouthful frame because it has the electronic components of a plurality of installations to go up the wallboard and have with lower wallboard, for convenient maintenance and installation, adopts the convenient maintenance of wallboard mouthful frame.

Preferably, wallboard mouthful frame has the turn-ups that sinks, the maintenance flap passes through the turn-ups that sinks and wallboard mouthful frame lock joint, adopt the middleware to install the maintenance flap usually, this application makes the maintenance flap can the lug connection through increasing the turn-ups.

Preferably, the wall plate opening frame of the lower wall plate comprises a lower wall plate front end opening frame and a lower wall plate rear end opening frame, the lower wall plate front end opening frame is positioned at the front end of the lower wall plate in the spanwise direction, and the lower wall plate rear end opening frame is positioned at the rear end of the lower wall plate in the spanwise direction; the wallboard mouth frame of going up the wallboard includes a plurality of last wallboard mouth frames that distribute along span direction, goes up the wallboard mouth frame and is located the middle section of going up the wallboard.

Preferably, the front port frame of the lower wall plate and the front port frame of the upper wall plate are all in a waist circle shape; the rear port frame of the lower wall plate is circular.

Preferably, the first foam core, the second foam core and the third foam core have the same height, and the fourth foam core has a height smaller than that of the third foam core.

Preferably, the density of the fourth foam core and the third foam core is smaller than that of the first foam core and the second foam core, because the wing belongs to a cantilever beam structure, the smaller the total amount of the free end in the spanwise direction is, the less the generation of bending moment can be reduced, and in addition, the closer to the free end is, the smaller the bearing force is, so that the reduction of the density of the third foam core and the fourth foam core can be more beneficial to reducing the weight and meeting the bearing requirement of the wing.

The advantages of the application include:

the upper wall plate adopts foam sandwich cores with different densities and heights in the optimized design so as to achieve the purposes of reducing the weight and the manufacturing cost.

By utilizing the designability of the composite material, the connecting area of the wall plate is designed to be connected by using the existing structural part as much as possible without introducing new parts, so that the number of the parts can be reduced and the weight can be reduced on the premise of not reducing the structural strength.

Drawings

Fig. 1 is a schematic view of a wing foam sandwich panel of an unmanned aerial vehicle according to a preferred embodiment of the present application;

FIG. 2 is a schematic view of an upper panel according to a preferred embodiment of the present application;

FIG. 3 is a schematic view of a lower wall plate according to a preferred embodiment of the present application;

fig. 4 is an enlarged view of a portion a.

Wherein, 1-upper wall plate; 2-lower wall plate; 3,4-a first foam core; 5-a second foam sandwich; 6-third foam sandwich; 7-fourth foam sandwich; 8-fifth foam sandwich; 9-reinforcing ribs; 10-a wallboard opening frame.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are implementations that are part of this application and not all implementations. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application, and should not be construed as limiting the present application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.

The invention relates to a wing panel of a certain type unmanned aerial vehicle, which consists of an upper panel 1 and a lower panel 2, wherein the upper panel and the lower panel are both of foam sandwich structures. The lower wall 2 is bordered by a recess for the upper wall 1 to overlap and glue, which reduces both the number of parts with plates and the weight. The foam sandwich of the upper wall plate 1 is divided into five blocks, and the foam sandwich with different heights and different densities is adopted after the optimized design, so that the design requirement is met and the weight reduction effect is achieved; the lower wall 2 is provided with a foam core only in the tank region. Due to the limitation of airfoil height and space, the rear edge of the lower wall plate is specially bonded with an L-shaped piece to improve the stability of the lower wall plate. The lower wall plate is provided with seven maintenance opening covers, and in order to reduce the number of parts with plates and reduce weight, sunken flanging edges are designed at the opening frame of the wall plate for connecting the opening covers;

specifically, the method comprises the following steps: the application provides an unmanned aerial vehicle wing foam presss from both sides core wallboard, include: the upper wall plate 1 and the lower wall plate 2 are both of a double-layer structure formed by laminating an outer panel and an inner panel, the upper wall plate 1 and the lower wall plate 2 are fixedly bonded by glue, and the number of parts with plates can be reduced and the weight can be reduced by adopting the glue for fixing and bonding;

the upper wall plate 1 is divided into a front section, a middle section and a rear section from the front edge to the rear edge of the flap, and a fourth foam sandwich 7 is arranged between an outer panel and an inner panel of the front section; a

first foam sandwich

3,4, a second foam sandwich 5 and a third foam sandwich 6 are sequentially arranged between the outer panel and the inner panel of the middle section along the spanwise direction;

the outer panel and the inner panel in the middle of the lower wall plate 2 are provided with a fifth foam sandwich 8.

In some alternative embodiments, the lower wall plate 2 has a recess at the connection with the upper wall plate 1, where the upper wall plate 1 overlaps the lower wall plate 2 and is adhesively bonded.

In some alternative embodiments, the rear edge of the lower wall plate 2 cannot be provided with other structures due to the limitation of airfoil profile height and space, and in order to improve the stability of the lower wall plate 2, a reinforcing rib 9 is bonded to the rear edge of the inner panel of the lower wall plate 2 along the spanwise direction; the reinforcing ribs 9 are L-shaped corner pieces.

In some optional implementation manners, the upper wall plate 1 and the lower wall plate 2 both have a plurality of wall plate opening frames 10, and the detachable maintenance opening cover is installed on the wall plate opening frame 10, because the upper wall plate 1 and the lower wall plate 2 have electronic components of a plurality of installations, the maintenance and the installation are facilitated by the wall plate opening frame 10.

In some optional embodiments, the wall panel opening frame 10 has a sunken flange through which the service flap is fastened to the wall panel opening frame 10, and the service flap is usually installed by using an intermediate member.

In some alternative embodiments, the panel opening frame 10 of the lower panel 2 includes a lower panel front port frame located at the front end in the spanwise direction of the lower panel 2 and a lower panel rear port frame located at the rear end in the spanwise direction of the lower panel 2; the wall plate opening frame 10 of the upper wall plate 1 comprises a plurality of upper wall plate opening frames distributed in the spanwise direction, and the upper wall plate opening frames are located in the middle section of the upper wall plate 1.

In some optional embodiments, the lower wall plate front port frame and the upper wall plate front port frame are both waist-circular; the rear port frame of the lower wall plate is circular.

In some alternative embodiments, the

first foam core

3,4, the second foam core 5 and the third foam core 6 have the same height, and the fourth foam core 7 has a height that is less than the height of the third foam core 6.

In some optional embodiments, the density of the fourth foam core 7 and the third foam core 6 is less than that of the

first foam core

3,4 and the second foam core 5, because the wing is of a cantilever beam structure, the smaller the total amount of the free ends in the spanwise direction is, the less the bending moment is generated, and in addition, the closer to the free ends, the smaller the bearing force is, and therefore, the reduction of the density of the third foam core 6 and the fourth foam core 7 is more beneficial to reducing the weight and meeting the bearing requirement of the wing.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An unmanned aerial vehicle wing foam sandwich wallboard, which is characterized by comprising: the wall comprises an upper wall plate (1) and a lower wall plate (2), wherein the upper wall plate (1) and the lower wall plate (2) are of a double-layer structure formed by laminating an outer panel and an inner panel, and the upper wall plate (1) and the lower wall plate (2) are fixedly bonded through glue;

the upper wall plate (1) is divided into a front section, a middle section and a rear section from the front edge to the rear edge of the flap fly, and a fourth foam sandwich (7) is arranged between an outer panel and an inner panel of the front section; a first foam sandwich (3,4), a second foam sandwich (5) and a third foam sandwich (6) are sequentially arranged between the outer panel and the inner panel of the middle section along the spanwise direction;

the outer panel and the inner panel in the middle of the lower wall plate (2) are provided with a fifth foam sandwich core (8).

2. The unmanned aerial vehicle wing foam sandwich panel of claim 1, wherein the lower panel (2) has a recess at the junction with the upper panel (1), and the upper panel (1) overlaps the lower panel (2) at the recess and is adhesively secured.

3. The unmanned aerial vehicle wing foam sandwich panel of claim 1, wherein the lower panel (2) has reinforcing ribs (9) bonded to the rear edge of the inner panel in the spanwise direction.

4. The unmanned aerial vehicle wing foam sandwich panel of claim 3, wherein the reinforcing ribs (9) are L-shaped angle pieces.

5. The unmanned aerial vehicle wing foam sandwich panel of claim 1, wherein the upper panel (1) and the lower panel (2) each have a plurality of panel opening frames (10), and the panel opening frames (10) are provided with detachable maintenance covers.

6. The unmanned aerial vehicle wing foam sandwich panel of claim 5, wherein the panel opening frame (10) has a sunken bead through which the service flap is fastened to the panel opening frame (10).

7. The unmanned aerial vehicle wing foam sandwich panel of claim 1, wherein the panel opening frame (10) of the lower panel (2) comprises a lower panel front port frame and a lower panel rear port frame, the lower panel front port frame is located at the front end of the lower panel (2) in the spanwise direction, and the lower panel rear port frame is located at the rear end of the lower panel (2) in the spanwise direction; the wallboard opening frame (10) of the upper wallboard (1) comprises a plurality of upper wallboard opening frames distributed in the spanwise direction, and the upper wallboard opening frames are located in the middle section of the upper wallboard (1).

8. The unmanned aerial vehicle wing foam sandwich panel of claim 1, wherein the lower panel front port frame and the upper panel port frame are all waist-circular; the rear port frame of the lower wall plate is circular.

9. The unmanned aerial vehicle wing foam sandwich panel of claim 1, wherein the first foam sandwich (3,4), the second foam sandwich (5) and the third foam sandwich (6) have the same height, and the fourth foam sandwich (7) has a height less than the height of the third foam sandwich (6).

10. The unmanned aerial vehicle wing foam sandwich panel of claim 1, wherein the density of the fourth foam sandwich (7) and the third foam sandwich (6) is less than the density of the first foam sandwich (3,4) and the second foam sandwich (5).