CN109911199B

CN109911199B - Wing tip follow-up buoy of variable sweep wing seaplane

Info

Publication number: CN109911199B
Application number: CN201910244763.3A
Authority: CN
Inventors: 马东立; 陈锦涌; 胡浩德; 罗智刚; 姚远
Original assignee: Beihang University
Current assignee: Beihang University
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2021-01-12
Anticipated expiration: 2039-03-28
Also published as: CN109911199A

Abstract

The invention discloses a wing tip follow-up buoy of a variable sweepback wing seaplane, which comprises a buoy body, a buoy connecting mechanism and a follow-up mechanism; the buoy is positioned below the wing and close to the root and is connected with the wing through a buoy connecting mechanism; and the function that the buoy is always parallel to the axis of the airplane body along with the change of the sweepback angle of the wings is realized through the follow-up mechanism. The buoy is divided into an upper part and a lower part, the upper part can rotate around the wing and is connected with the follow-up mechanism, and the lower part can be detached, so that the process and the use maintainability of the buoy are ensured. The wing tip follow-up buoy has the advantages that the design of the wing tip follow-up buoy is realized with a relatively simple structure and very low weight cost, the wing tip follow-up buoy can be always kept parallel to a fuselage in the process of changing the sweepback angle of the wing, and the wing tip follow-up buoy has very high practical application value.

Description

Wing tip follow-up buoy of variable sweep wing seaplane

Technical Field

The invention belongs to the field of aircraft design, and particularly relates to a wing tip follow-up buoy of a variable-backswept-wing seaplane.

Background

Wingtip pontoons are commonly used with seagoing fuselages to maintain lateral stability of the seaplane when taxiing thereon. Some military seaplanes have high speed requirements and therefore require a high sweep angle of the wing during the design of the aircraft. The resistance is large when the aircraft slides on the water surface, the acceleration is difficult, the landing speed is not too high, the aircraft is required to have a small take-off and landing speed, and the sweepback angle of the aircraft is required to be as small as possible. There is therefore a need for a variable sweep wing seaplane. Compared with the traditional airplane, the variable sweepback wing of the seaplane brings additional consideration to the following problems: if the wingtip pontoon rotates with the wing, the pontoon forms a larger angle with the water flow when the aircraft is planing on the water, which causes greater drag and heading moment disturbances. To solve this problem, a wingtip buoy follower must be designed so that the wingtip buoy is always parallel to the fuselage plane.

Disclosure of Invention

In order to meet the requirement of the seaplane on changing the sweepback wing, the invention designs a wing tip follow-up buoy which can be always parallel to the symmetrical plane of the plane body in the process of changing the sweepback angle of the plane body; the wing structure is based on a parallelogram principle, is very simple and reliable in structure, adopts a rigid rope to bear pulling force to pull the buoy to keep the buoy parallel to a fuselage, has low requirement on the internal space of the wing, is not easy to generate structural interference, and has very obvious weight advantage.

The invention relates to a wing tip follow-up buoy of a variable sweepback wing seaplane, which comprises a buoy body, a buoy connecting mechanism and a follow-up mechanism.

The utility model discloses a float bowl mechanism, including float bowl main part, connecting cylinder, connecting shaft, connecting cylinder.

The follow-up mechanism comprises a buoy connecting lug, a front lug, a rear lug and a rigid rope; the floating barrel connecting lug is fixed on a rotating shaft in the floating barrel connecting mechanism and penetrates through a lightening hole in the wing beam, so that two ends of the floating barrel connecting lug are respectively positioned in the front and the back of the wing beam; the front lug and the rear lug are respectively fixed at the wing root of the wing and are positioned at the front side and the rear side of the wing beam; the rigid ropes are a front rigid rope and a rear rigid rope and are positioned at the front side and the rear side of the wing girder; the outer ends of the two rigid ropes are respectively connected with the two ends of the connecting lug of the floating barrel, and the inner ends of the two rigid ropes are respectively connected with the rope through holes on the front lug and the rear lug.

Therefore, in the process of increasing the sweepback angle of the wing, the front end of the buoy body is driven to rotate outwards, and the rear end of the buoy body is driven to rotate inwards. The front end of the buoy body rotates outwards to increase the distance between the two ends of the front rigid rope, so that the front rigid rope can be pulled by the buoy body to the front rigid rope, and the front rigid rope is pulled to keep parallel to the symmetrical plane of the machine body due to small deformation of the rigid rope; similarly, in the process that the wing reduces the sweepback angle and rotates from back to front, the rear rigid rope is under the action of pulling force to enable the buoy body to be parallel to the fuselage.

The invention has the advantages that:

1. the wing tip follow-up buoy disclosed by the invention is always parallel to the symmetrical plane of the fuselage in the form of a follow-up mechanism, and does not need to be controlled by an actuating mechanism.

2. The wing tip follow-up buoy disclosed by the invention ensures that the buoy and the symmetrical plane of a machine body are always parallel by utilizing the parallelogram principle, and the operation is reliable and stable.

3. The wing tip follow-up buoy mainly depends on two rigid ropes to drive the wing tip buoy to follow up, has low requirement on the internal space of the wing, is not easy to generate structural interference, and has good universality and obvious weight advantage.

4. The wing tip follow-up buoy can be conveniently disassembled, angle-adjusted and height-adjusted when in use, and has good use and maintenance performance.

5. The wing tip follow-up buoy has the advantages of simple overall structure, low weight cost and low cost.

Drawings

FIG. 1 is a schematic view of the installation position of a wing tip follow-up pontoon of a variable sweep wing seaplane of the present invention;

FIG. 2 is a schematic view of the connection mode of the buoys in the wing tip follow-up buoys of the variable sweep wing seaplane of the present invention;

FIG. 3 is a schematic view of a follower mechanism in a wing tip follower pontoon of a variable sweep wing seaplane according to the present invention;

FIG. 4 is a schematic view of the front and rear parallelograms of the wing main beam in the wing tip follow-up pontoon of the variable sweep wing seaplane of the present invention;

FIG. 5 is a schematic view of the attitude of the tip follow-up pontoon of the variable sweep wing seaplane of the present invention as the sweep angle of the wing changes.

In the figure:

1-float body 2-float connecting mechanism 3-follow-up mechanism

4-fuselage 5-wing 6-fuselage reinforcing frame

7-wing reinforcing alloy part 101-connecting cylinder 201-connecting surface

202-shaft sleeve 203-hollow connecting shaft 204-buoy hoop

301-buoy connection lug 302-front lug 303-back lug

304-rigid cord 301 a-middle loop 301 b-side ear piece

501-wing girder 502-lightening hole

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The invention relates to a wing tip follow-up buoy of a variable backswept wing seaplane, which comprises a buoy body 1, a buoy connecting mechanism and a follow-up mechanism, as shown in figures 1, 2 and 3.

The whole appearance of flotation pontoon main part 1 adopts the ship shape casing, and flotation pontoon main part 1 axial is on a parallel with the 4 planes of symmetry of fuselage, installs in wing 5 below and is close to wing point department, and flotation pontoon main part 1 section is located 1/2 fuselage 4 department. The design has connecting cylinder 101 of vertical direction on the flotation pontoon main part 1 for with the wing 5 within a definite time be connected, and adopt detachable connected mode between flotation pontoon main part 1 and wing 5, specifically do: the wing main girder 501 is provided with a buoy connecting mechanism 2 for connection. The buoy connecting mechanism comprises a connecting surface 201, a shaft sleeve 202 and a hollow connecting shaft 203. The connection surface 201 is an annular frame structure and is fixed on the main beam of the wing 5, and the hollow part of the connection surface 201 is communicated with a lightening hole 502 which is arranged on the main beam 501 along the main beam 501. The upper and lower positions of the connection surface 201 are respectively designed with an integrated shaft sleeve 202. A connecting shaft 203 is coaxially arranged between the upper shaft sleeve 202 and the lower shaft sleeve 202, and the connecting shaft is not connected with the two shaft sleeves 202 and can rotate; the bottom end of the connecting shaft 203 is used for sleeving the connecting cylinder 101 on the buoy body 1. A gap is designed at the top end of the connecting cylinder 101 along the self axial direction; therefore, after the top end of the connecting cylinder 101 is sleeved at the bottom end of the connecting shaft 203, the top end of the connecting cylinder 101 is sleeved with the buoy hoop 204, and the gap is narrowed by extrusion of the buoy hoop 204, so that the connecting cylinder 101 and the connecting shaft 203 are fixed, and further the buoy body 1 and the wing girder 501 are fixed. By taking down the buoy hoop 204, the detachment of the buoy body 1 and the adjustment of the height of the buoy body 1 can be realized. Therefore, the invention realizes the functions of fixing and rotating the buoy body 1 and the wing 5 with a simple structure and lower weight cost; meanwhile, the buoy body 1 is detachable, and has adjustable angle and height and strong structural reliability.

The follow-up mechanism 3 comprises a buoy connecting lug 301, a front lug 302, a rear lug 303 and a rigid rope 304. The buoy connecting lug 301 is provided with a middle ring loop 301a and strip-shaped side lugs 301b symmetrically designed on two sides of the ring loop 301a, and the end parts of the side lugs 301b are provided with rope through holes. The buoy connecting lug 301 is sleeved in the middle of the connecting shaft 203 of the buoy connecting mechanism 2 through a middle ring sleeve 301a and is positioned between the upper shaft sleeve 202 and the lower shaft sleeve 202, and the fixation between the buoy connecting lug 301 and the connecting shaft 203 is realized through the tightening of an integral lug hoop 301c designed on the middle ring; after the buoy connecting lug 301 and the connecting shaft 203 are fixed, the middle ring sleeve 301a and the lug anchor ear are respectively matched with an upper shaft sleeve 202 and a lower shaft sleeve 202 in the buoy connecting mechanism, so that the axial limiting of the connecting shaft 203 is realized. Meanwhile, in the pontoon connecting lug 301, the side lug 301b on one side of the ring sleeve 301a passes through the lightening hole 502 on the wing girder 501 from the connecting surface 201 of the pontoon connecting mechanism 2 in a hollow manner, so that the end parts of the two side lugs 301b of the pontoon connecting lug 301 are respectively positioned at the front side and the rear side of the wing girder 501.

The two rigid ropes 304 are a front rigid rope and a rear rigid rope, and are located on the front side and the rear side of the wing main beam 501. The outer ends of the two rigid ropes are respectively connected and fixedly connected with rope through holes at the end parts of lugs 301b at two sides of the buoy connecting lug 301, and the inner ends of the two rigid ropes are respectively fixedly connected with the rope through holes on the front lug 302 and the rear lug 303 which are arranged at the front side and the rear side of the wing main beam 501 at the wing root. The front lug 302 and the rear lug 303 are mounted on a fuselage reinforcing frame 6 mounted at the wing root of the wing, and the wing girder 501 is coupled with the fuselage reinforcing frame 6 through a wing reinforcing alloy part 7. The two rigid ropes 304 penetrate the wing 5 inside the wing 5, are equal to the effective length of the wing girder 501 (the length between the rotating shaft of the wing girder 501 and the rotating shaft of the buoy connecting lug 301), and are parallel to each other. Therefore, a front parallelogram and a rear parallelogram are formed on the front side and the rear side of the wing girder 501, and are respectively a parallelogram formed by the fuselage 4, the buoy body 1, the wing girder 501 and the front rigid rope; and a parallelogram formed by the fuselage 4, the pontoon body 1, the wing girders 501 and the rear rigid ropes, as shown in fig. 4.

The fuselage 4 is provided with a driving mechanism for changing the sweepback wing, and the driving mechanism can generate driving torque to enable the wing 5 to rotate forwards and backwards to increase the sweepback wing or rotate forwards to decrease the sweepback wing. In the process that the wing 5 rotates from front to back to increase the sweepback angle, the front end of the buoy body 1 tends to rotate outwards, and the rear end tends to rotate inwards. The distance between the two ends of the front rigid rope is increased by rotating the front end of the buoy body 1 outwards, so that the front rigid rope 304 can be pulled by the buoy body 1, and the rigid rope 304 deforms very little, so that the buoy body 1 can be pulled to keep parallel with the symmetrical plane of the fuselage 4, and a new parallelogram with unequal angles with the equal length of the original parallelogram is formed at the front side and the rear side of the wing girder 501, as shown in fig. 5; similarly, in the process that the wing 5 reduces the sweepback angle and rotates from back to front, the rear rigid rope is under the action of pulling force to enable the buoy body 1 to be parallel to the buoy body 1.

The wing tip follow-up buoy of the variable sweepback wing seaplane is based on the parallelogram principle, has a very simple and reliable structure, adopts the rigid rope 304 to bear the pulling force to pull the buoy body 1 to keep the buoy body parallel to the fuselage 4, has low requirement on the internal space of the wing 5, is not easy to generate structural interference, and has very obvious weight advantage.

Claims

1. A wing tip follow-up buoy of a variable sweep wing seaplane is characterized in that: comprises a buoy body, a buoy connecting mechanism and a follow-up mechanism;

the connecting cylinder is detachably connected with the wing main beam through the buoy connecting mechanism, and the buoy body can rotate along with a connecting shaft in the buoy connecting mechanism;

the follow-up mechanism comprises a buoy connecting lug, a front lug, a rear lug and a rigid rope; the buoy connecting lug is fixed on a rotating shaft in the buoy connecting mechanism and penetrates through a lightening hole in the wing girder, so that two ends of the buoy connecting lug are respectively positioned in front of and behind the wing girder; the front lug and the rear lug are respectively fixed at the wing root of the wing and are positioned at the front side and the rear side of the main girder of the wing; the rigid ropes are a front rigid rope and a rear rigid rope and are positioned at the front side and the rear side of the wing girder; the outer ends of the two rigid ropes are respectively connected with two ends of the connecting lug of the floating barrel, and the inner ends of the two rigid ropes are respectively connected with the rope through holes on the front lug and the rear lug;

therefore, when the wing changes the sweepback angle, the rigid rope bears the pulling force to pull the buoy to keep parallel to the fuselage;

the two rigid ropes penetrate through the wing inside the wing, are equal to the effective length of the wing main beam and are parallel to each other; a front parallelogram and a rear parallelogram are formed on the front side and the rear side of the wing girder, and are respectively a parallelogram formed by the fuselage, the buoy body, the wing girder and the front rigid rope; and a parallelogram formed by the fuselage, the buoy body, the wing girder and the rear rigid rope.

2. The wing tip follow-up buoy of a variable sweep wing seaplane as claimed in claim 1, wherein: the whole appearance of the float main body adopts a ship-shaped shell, the axial direction of the float main body is parallel to the symmetrical plane of the fuselage, the float main body is arranged below the wing and close to the wing tip, and the section of the float main body is positioned at 1/2 fuselage.

3. The wing tip follow-up buoy of a variable sweep wing seaplane as claimed in claim 1, wherein: the float connecting mechanism comprises a connecting surface, a shaft sleeve and a connecting shaft; the connecting surface is fixed on the wing girder, an upper shaft sleeve and a lower shaft sleeve are designed on the connecting surface, and a connecting shaft is coaxially arranged in the shaft sleeves; the bottom end of the connecting shaft is sleeved with the connecting cylinder on the buoy body.

4. A variable sweep wing seaplane tip follower pontoon as defined in claim 3, wherein: a gap is designed at the top end of the connecting cylinder along the self axial direction; after the top end of the connecting cylinder is sleeved at the bottom end of the connecting shaft, the top end of the connecting cylinder is sleeved with a buoy hoop, and the connecting cylinder and the connecting shaft are fixed through the buoy hoop.

5. A variable sweep wing seaplane tip follower pontoon as defined in claim 3, wherein: the buoy connecting lug is fixed with the connecting shaft through the lug hoop with an integrated structure.

6. The wing tip follow-up buoy of a variable sweep wing seaplane as claimed in claim 1, wherein: the front lug and the rear lug are arranged on a fuselage reinforcing frame arranged at the wing root of the wing, and the wing girder is in shaft connection with the fuselage reinforcing frame through a wing reinforcing alloy piece.