CN112224386A

CN112224386A - Single-wing self-rotating landing device

Info

Publication number: CN112224386A
Application number: CN202011123465.8A
Authority: CN
Inventors: 牛培行; 焦重熙; 刘少宝; 卢天健
Original assignee: Nanjing University of Aeronautics and Astronautics
Current assignee: Nanjing University of Aeronautics and Astronautics
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-01-15

Abstract

The application discloses single-wing spin landing device can make the load of following aerial input at the whereabouts in-process, makes the paddle produce lift through the rotation to slow down falling speed and fall to the ground safely. The single-wing self-rotating descending device comprises a storage box, a front edge counterweight and blades. According to the practical engineering application condition, the effective load needing to be decelerated can be placed into the containing box and taken as the wing root counterweight together, and the mass and the position of the front edge counterweight and the size and the shape of the blade are respectively and reasonably arranged, so that the whole body can normally operate. The invention is specially designed for air-dropped objects and air-dropped loads with special requirements. The invention is similar to the principle of 'maple seeds' in nature. When falling, the air pushes the blades to rotate the whole device, so that lift force is generated, the falling speed is reduced, and the device has the characteristics of simple structure, effectiveness and reliability.

Description

Single-wing self-rotating landing device

Technical Field

The invention relates to the technical field of aviation systems, in particular to a single-wing self-rotating landing device.

Background

When the supplies or loads are delivered from the air, the parachute is usually used to decelerate the loads, and the landing speed is controlled within a safe range.

The parachute has good deceleration effect, thus being widely applied. However, parachutes also suffer from the following disadvantages:

the structure is complex. The parachute mainly comprises an umbrella cover and dozens of umbrella ropes, and the design and the processing have certain difficulties.

It is inconvenient to use. The folding and packing of the parachute require the responsibility of an experienced person. The parachute itself also needs to be inspected and maintained regularly to prevent damaged or aged umbrella fabric and rope from being put into use.

It may not open in time or fail to open. Before the parachute is put in, the parachute is in a folded and compressed state. After being thrown, the inflatable bag is inflated and expanded slowly under the action of airflow and finally unfolded completely to play a role of deceleration. However, sometimes the folding method is not correct, or the posture during the putting is not satisfactory, so that the umbrella rope and the umbrella cover are wound together, and the whole parachute cannot work normally.

The "maple seeds" existing in nature are another airborne deceleration solution. On the side of the oval seed, there is a light and thin paddle. When the maple seeds fall from the tree, the air pushes the blades to enable the whole maple seeds to rotate, so that lift force is generated, the falling speed of the maple seeds is slowed down, and the maple seeds can float to a farther place. The principle of the invention is from maple seeds, and the invention has the characteristics of simple structure, effectiveness and reliability.

Disclosure of Invention

The invention aims to solve the technical problem of providing a novel empty material descending device which is characterized by simple structure, effectiveness and reliability.

In order to achieve the purpose, the invention provides the following technical scheme:

a single-wing self-rotating landing device is characterized by comprising blades, a storage box and a front edge counterweight;

the paddle is a rectangular thin flat plate with the length-width ratio larger than 1, and the mass of the paddle accounts for 5-20% of that of the single-wing spin-down device;

the front edge counterweight is arranged at the position of 5-50% of the front edge of the blade in the spanwise direction and fixedly connected with the blade, and the mass of the front edge counterweight accounts for 5-20% of that of the single-wing self-rotating landing device;

the storage box is arranged at the root part of the blade and fixedly connected with the blade and used for placing articles to be thrown in, and the storage box and the articles in the storage box form a wing root balance weight together;

the aerodynamic unbalanced structure formed by the front edge counterweight, the wing root counterweight and the blades enables the single-wing self-spinning landing device to enter a rotating state under the action of unbalanced aerodynamic force after being thrown in the air, and the rotation causes the wing root counterweight, the front edge counterweight and the blades to generate inertia force, and finally the inertia force and the blade aerodynamic force are balanced with each other to fall at a stable speed.

As a further optimization scheme of the single-wing self-rotating landing device, the storage box comprises a box body and a box cover, the box body is fixed to the root of the blade, the box cover is movably connected with the box body, and a closed cavity is formed when the box cover is connected with the box body.

Compared with the prior art, the invention has the advantages that:

the invention has simple structure and easy manufacture and processing. Convenient to use does not need too much maintenance. When the empty head falls, the deceleration effect is effective and reliable, the success rate is high, and the influence of the throwing posture is not easy to be influenced.

Drawings

FIG. 1 is a perspective view of an apparatus according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of a wing root counterweight according to an embodiment of the present invention.

In the figure, 1-a storage box, 2-a front edge counterweight, 3-a blade, 4-a box body, 5-a box cover, 6-a hinge and 7-a locking buckle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail 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 embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1, the invention discloses a single-wing self-rotating landing device, which is characterized by comprising a blade, a storage box and a front edge counterweight;

the paddle is a rectangular thin flat plate with the length-width ratio larger than 1, and the mass of the paddle accounts for 5-20% of that of the single-wing spin-down device; on the basis, the root ratio, the chord length distribution, the torsion angle distribution, the airfoil section shape and the like can be further changed to obtain the optimal aerodynamic performance;

The storage box comprises a box body and a box cover, wherein the box body is fixed, the box cover is movably connected with the box body, and a closed cavity is formed when the box cover is connected with the box body.

Refer to fig. 2, the lid and the box body of receiver link to each other through two hinges, can freely open and close, form airtight cavity when closing, have set up the locking buckle simultaneously, make lid and box body fixed, lid this moment can not be opened through the locking buckle when closing, when needing to open the lid, open the locking buckle earlier, then opening the lid.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A single-wing self-rotating landing device is characterized by comprising blades, a storage box and a front edge counterweight;

2. A single wing spin-down device according to claim 1, wherein the receptacle comprises a box and a lid, the lid and the box being movably connected to form a closed chamber when the lid and the box are connected.