CN219237372U - Structure for preventing parachute from turning over in air - Google Patents

Abstract

The utility model provides a structure for preventing parachute from turning over in the air, which comprises a main canopy part, a plurality of parachute ropes, a turnover preventing net and a canopy bottom edge, wherein the plurality of parachute ropes are uniformly distributed on the canopy bottom edge, a circle of turnover preventing net similar to a fish net structure is arranged along the periphery of the canopy bottom edge, the length of the turnover preventing net is equal to that of the canopy bottom edge, one end of the turnover preventing net is connected with the canopy bottom edge, and the other end of the turnover preventing net extends towards the direction of the parachute ropes and is connected with the parachute ropes. When the main part of the parachute canopy is straightened by the parachute rope and is about to start to be inflated, the structure can limit the inward movement of the fabrics at the bottom edge part of the parachute canopy to enter the adjacent or opposite bottom edge of the parachute canopy due to the sufficient air permeability, so that the phenomenon of 'turning over' caused by inflation from the lower part of the adjacent or opposite bottom edge of the parachute canopy is further realized, the working reliability of the parachute is improved, and the application range of the parachute is expanded.

Description

Structure for preventing parachute from turning over in air

Technical Field

The utility model belongs to the field of aviation lifesaving equipment, and relates to a structure for preventing an aerial parachute from turning over.

Background

The parachute is generally made of flexible fabrics, has soft texture and small volume after being packaged, can make the folded canopy be inflated and fully inflated rapidly under the action of air, and can obtain a resistance surface which is tens to hundreds times larger than the original folded state, thereby greatly reducing the descending speed of suspended objects. In the process, the appearance of the parachute can be greatly changed, and the air flow in and out of the canopy is very complex; simultaneously, the main part of the umbrella cloth can be rapidly deformed under the action of the inner air flow and the outer air flow.

The above situation causes that the parachute is affected by the external environment such as air density, temperature, humidity, wind speed, wind direction, ascending or descending air flow and the like in the inflation and unfolding process, and often does not work according to the normal inflation and inflation process. When the parachute is inflated and unfolded, before the main part of the parachute canopy and the whole length of the parachute cord are not completely straightened, the fabric at the bottom edge part of the parachute canopy is contracted inwards due to the factors of external environment (such as lateral air flow and the like) or abnormal opening procedure and the like, and enters and passes through the adjacent or opposite bottom edges (or the parachute cords) of the parachute canopy to be inflated, and the phenomenon is called as turning the parachute and crossing the parachute canopy. The parachute can be completely or partially turned during the inflation process. Fully everted means that the inner surface of the canopy is fully everted, typically without significantly adversely affecting the full shape and drag characteristics (i.e., descent speed) of the canopy, but with the result that the canopy burns and the handling characteristics of the canopy are affected. The local umbrella turning is affected by the development mode of aerodynamic force, and can be a permanent local umbrella turning or a temporary local umbrella turning. The permanent partial turning umbrella (also called as saddle phenomenon) can not restore to a normal fully-opened state, so that the maximum cross-sectional area of the main part of the parachute canopy can be obviously reduced, the descending speed is increased, and the parachute canopy can normally rotate to cause landing danger; the temporary partial turning umbrella is gradually released along with the change of inflation of the main part of the canopy.

In summary, the parachute can cause the damage such as abnormal parachute opening, main part burn of canopy, functional failure, etc., and especially under the high-speed condition, the parachute is more common in the process of inflation and deployment. The parachute can be prevented from turning over in the air inflation and unfolding process, the working reliability of the parachute can be improved, and the application range of the parachute is enlarged.

Disclosure of Invention

The utility model aims at: the structure for preventing the parachute from being turned over in the air can prevent the parachute from turning over in the air inflation and unfolding process, improve the working reliability of the parachute and enlarge the application range of the parachute.

The technical scheme adopted by the utility model is as follows: the structure for preventing the parachute from turning over in the air comprises a main canopy part, a plurality of parachute ropes, and a plurality of parachute rope anti-turning nets and a plurality of parachute rope bottom edges, wherein the plurality of parachute ropes are uniformly distributed on the parachute bottom edges.

In the scheme, the length of the anti-overturning net extending towards the direction of the umbrella rope is about 5-10% of the diameter of the bottom edge of the umbrella.

In the scheme, the anti-overturning net is used for sewing the umbrella rope on the anti-overturning net through the stitching.

The utility model has the advantages and beneficial effects that: the structure can control the bottom edge of the canopy when the parachute is inflated and unfolded. When the main part of the parachute canopy is straightened and the main part of the parachute canopy is about to be inflated, the structure can limit the inward movement of the fabrics at the bottom edge part of the parachute canopy due to the sufficient air permeability, and the fabrics enter the adjacent or opposite bottom edge of the parachute canopy, thereby the phenomenon of 'turning over' caused by inflation from the lower part of the adjacent or opposite bottom edge of the parachute canopy

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a schematic diagram of the operation of the parachute of the present utility model in full.

Fig. 2 is an expanded schematic view of the present utility model.

In the figure, 1, the canopy, 2, the umbrella rope, 3, the anti-overturning net, 4, the bottom edge of the canopy and 5, the stitching.

Detailed Description

The utility model is described in further detail below by way of specific embodiments with reference to the accompanying drawings:

in fig. 1, after the parachute is started, after the main canopy part 1 and the parachute cords 2 are sequentially pulled out from the parachute bag (or the parachute cover), the main canopy part 1 begins to inflate instantly, and when part of the canopy bottom edges 4 shrink inwards due to factors such as external environment (such as lateral airflow and the like) or abnormal opening procedures, the anti-overturning net 3 can limit part of the canopy bottom edges 4 to enter a gap formed by the adjacent or opposite canopy bottom edges 4 and the parachute cords 2, so that the occurrence of the overturning of the parachute is prevented. Meanwhile, the anti-overturn net 3 has sufficient air permeability, and even if part of the canopy bottom edge 4 enters a gap formed by the adjacent or opposite canopy bottom edges 4 and the parachute ropes 2, air flow can rapidly flow out of the anti-overturn net 3, and the canopy bottom edge 4 can rapidly recover to a normal state under the action of the tension of the parachute ropes 2, so that the occurrence of parachute overturn is prevented.

In fig. 2, the anti-tip net 3 is sewn to the canopy base 4 and the parachute line 2 by a stitch 5.

The above-mentioned embodiments of the present utility model are only examples of the parachute for a person, and the present utility model is not limited to any form or application, and those skilled in the art can make a few simple modifications, equivalent changes or modifications by using the above-mentioned disclosed technical matters, and all the modifications are within the scope of the present utility model.

Claims (3)

1. The utility model provides a prevent structure of parachute in air of parachute, includes canopy main part (1), umbrella rope (2) prevent turning over net (3) and canopy base (4), and umbrella rope (2) are many, evenly distributed on canopy base (4), its characterized in that, set up round similar "fish net" structure prevent turning over net (3) along canopy base (4), prevent turning over net (3) length and canopy base (4) equal, one end is connected with canopy base (4), and the other end extends to umbrella rope (2) direction to be connected with umbrella rope (2).

2. A structure for preventing aerial turnover of parachute as in claim 1 in which the length of the turnover preventing net (3) extending toward the parachute line (2) is about 5% to 10% of the diameter of the bottom edge (4) of the canopy.

3. A structure for preventing parachute from turning over in the air as claimed in claim 2, characterized in that the said anti-turning net (3) is sewn with the parachute line (2) on the anti-turning net (3) through the suture (5).

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