CN215851850U

CN215851850U - Ventral fin structure

Info

Publication number: CN215851850U
Application number: CN202122164050.1U
Authority: CN
Inventors: 不公告发明人
Original assignee: Beijing Lanke Yingsheng Aviation Technology Co ltd
Current assignee: Beijing Lanke Yingsheng Aviation Technology Co ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-02-18
Anticipated expiration: 2031-09-08

Abstract

The utility model belongs to the technical field of aircraft components, and particularly relates to an abdominal fin structure which comprises an abdominal fin body, wherein the abdominal fin body is hollow, an opening is formed in the top of the abdominal fin body, the cross section of the abdominal fin body is in a wing shape, a partition plate is fixedly arranged in the abdominal fin body, the top of the abdominal fin body and the top of the partition plate are positioned on the same plane, and a rear connecting support and a front connecting support are fixedly arranged on the top of the abdominal fin body. The utility model is mainly made of carbon fiber composite material, has the advantages of beautiful appearance, light weight, sealing property, easy fixation, maintenance and replacement, low cost and short development period, and can meet the requirements of flame retardance and rigidity of load in flight.

Description

Ventral fin structure

Technical Field

The utility model relates to the technical field of airplane components, in particular to an ventral fin structure.

Background

The ventral fin of the airplane is a knife-shaped wing panel arranged below the tail part of the airplane body along the airflow direction. The ventral fin is equivalent to a vertical tail wing, and plays a role in improving the course stability of the airplane and keeping balance during sideslip; the ventral fin can also counteract the torque of a part of vertical fin lateral force on the fuselage, and reduce the torsional deformation of the fuselage; the common ventral fins of the airplane have a single ventral fin and a double ventral fin.

The traditional ventral fin structure is generally formed by riveting an aluminum alloy skin and a partition plate stringer, namely an aluminum alloy assembly, and has the defects of multiple parts, complex connection, heavy weight, low structural efficiency, large installation workload, high manufacturing cost and long period.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides an ventral fin structure.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides an abdomenal fin structure, includes the abdomenal fin body, the abdomenal fin body is cavity form and top and is equipped with the opening, the cross section of abdomenal fin body is the wing section, the inside fixed mounting of abdomenal fin body has the baffle, the top of abdomenal fin body and the top of baffle are in on the coplanar, the top fixed mounting of abdomenal fin body has back linking bridge and preceding linking bridge.

Preferably, skins are fixedly mounted on two sides of the ventral fin body, one sides of the skins on the two sides, which are close to each other, are fixedly connected together, and the skins are made of epoxy carbon fiber woven cloth prepreg cured at medium temperature.

Preferably, the taper of the outer wall surface of the ventral fin body is gradually reduced from top to bottom along the vertical direction.

Preferably, the ventral fin body is made of carbon fiber woven cloth prepreg, and the partition plate is made of carbon fiber woven cloth prepreg with the density of 32kg/m³The foam structure of (1).

Preferably, the ventral fin body is fixedly provided with a groove-shaped protection.

Preferably, the partition is a machined integral part.

Compared with the prior art, the utility model has the beneficial effects that: the exterior of the ventral fin body in the ventral fin structure is molded by a mold according to a pneumatic surface, the partition plate is integrally molded by machining, the whole ventral fin body mainly adopts carbon fiber woven cloth prepreg, a layer of medium-temperature cured epoxy carbon fiber glass cloth prepreg skin is arranged on the outer side, the manufacturing period can be shortened, the cost is reduced, the weight is reduced, the edge sealing is not required on the contact surface of the ventral fin body and a machine body, the rest of the simulation cabin is completely wrapped by composite materials, the exposed side of the partition plate is attached to the surface of the airplane, so that the installation operation is simple, the integrity of the simulation cabin is further improved, the ventral fin structure is equivalent to a vertical tail wing, the functions of improving the course stability and keeping balance of the airplane during sideslip are realized, the ventral fin structure can also counteract the torque of a part of vertical tail lateral force on the airplane body, the torsional deformation of the airplane body is reduced, the integrity and the light weight of the ventral fin structure enable the weight of the airplane to be optimized, and the ventral fin structure can achieve the best effect to the greatest extent.

The utility model is mainly made of carbon fiber composite material, has the advantages of beautiful appearance, light weight, sealing property, easy fixation, maintenance and replacement, low cost and short development period, and can meet the requirements of flame retardance and rigidity of load in flight.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view showing the overall structure of the rear connecting bracket and the front connecting bracket according to the present invention;

FIG. 3 is an enlarged schematic view of portion A of FIG. 1;

in the figure: 1. a ventral fin body; 2. a partition plate; 3. the rear connecting bracket; 4. the front is connected with the bracket.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides an abdomenal fin structure, including abdomenal fin body 1, abdomenal fin body 1 is cavity form and top and is equipped with the opening, the cross section of abdomenal fin body 1 is the wing section, the inside fixed mounting of abdomenal fin body 1 has baffle 2, the top of abdomenal fin body 1 and the top of baffle 2 are in the coplanar, the top fixed mounting of abdomenal fin body 1 has back linking bridge 3 and preceding linking bridge 4, back linking bridge 3 and preceding linking bridge 4 pass through the fastener and are in the same place with 1 fixed connection of abdomenal fin body, the convenience is maintained and is changed with the abdomenal fin structure from the fuselage dismantlement.

Skins are fixedly arranged on both sides of the ventral fin body 1, the sides, close to each other, of the skins on both sides are fixedly connected together, and the skins are made of medium-temperature cured epoxy carbon fiber woven cloth prepreg; the covering can play the guard action to the surface of ventral fin body 1, long-term after using only need to change the covering can, saved the maintenance cost.

The conicity of the outer wall surface of the ventral fin body 1 is sequentially reduced from top to bottom along the vertical direction; so as to reduce the whole weight of the ventral fin structure and simultaneously reduce the wind resistance of the ventral fin structure.

The ventral fin body 1 is made of carbon fiber woven cloth prepreg, and the partition plate 2 is made of carbon fiber woven cloth prepreg with the density of 32kg/m³Foam structure of 32kg/m³The foam of (2) is a high-density material, not only has lighter weight, but also has higher strength.

A groove-shaped protection plate is fixedly arranged on the ventral fin body 1; the groove-shaped protection plate can enable the two parts to be firstly damaged and absorb partial energy when the airplane accidentally rubs the ground, so that the ventral fin structure is protected.

Baffle 2 is machining integrated into one piece spare, can effectually ensure the bulk strength of baffle 2, has improved the intensity of ventral fin structure.

The working principle is as follows: the exterior of a ventral fin body 1 in the ventral fin structure is molded by a mold according to a pneumatic surface, a partition plate 2 is integrally molded by machining, the whole ventral fin body 1 mainly adopts carbon fiber woven cloth prepreg, a layer of medium-temperature cured epoxy carbon fiber glass cloth prepreg skin exists on the outer side, the manufacturing period can be shortened, the cost is reduced, the weight is reduced, the contact surface of the ventral fin body 1 and a fuselage is not sealed, the rest is completely wrapped by a composite material, the exposed side of the partition plate 2 is attached to the surface of the aircraft, the installation operation is simple, the integrity of a simulation cabin is increased, the ventral fin structure is equivalent to a vertical empennage, the course stability and the balance of the aircraft are increased during sideslip, the ventral fin structure can also counteract the torque of a part of vertical fin lateral force on the fuselage, the torsional deformation of the fuselage is reduced, and the integrity and the light weight of the ventral fin structure optimize the weight of the aircraft, the ventral fin structure can achieve the best effect to the maximum extent.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A ventral fin structure, includes ventral fin body (1), its characterized in that: the ventral fin body (1) is cavity form and top and is equipped with the opening, the cross section of ventral fin body (1) is the wing section, the inside fixed mounting of ventral fin body (1) has baffle (2), the top of ventral fin body (1) and the top of baffle (2) are in on the coplanar, the top fixed mounting of ventral fin body (1) has back linking bridge (3) and preceding linking bridge (4).

2. The ventral fin structure according to claim 1, wherein: skins are fixedly mounted on two sides of the ventral fin body (1), one sides of the skins on the two sides, which are close to each other, are fixedly connected together, and the skins are made of epoxy carbon fiber woven cloth prepreg cured at medium temperature.

3. The ventral fin structure according to claim 1, wherein: the taper of the outer wall surface of the ventral fin body (1) is gradually reduced from top to bottom along the vertical direction.

4. The ventral fin structure according to claim 1, wherein: the ventral fin body (1) is made of carbon fiber woven cloth prepreg, and the partition plate (2) is made of carbon fiber woven cloth prepreg with density of 32kg/m³The foam structure of (1).

5. The ventral fin structure according to claim 1, wherein: the fixed mounting of ventral fin body (1) has the cell type guard plate.

6. The ventral fin structure according to claim 1, wherein: the partition plate (2) is an integrally formed part through machining.