CN115108022A - Single-umbrella load-shedding steady-descending parachute system - Google Patents

Abstract

The invention provides a single-umbrella load-shedding stable-descending parachute system which comprises a canopy, an elastic canopy, a covering canopy, short parachute cords, a restraint rope, a separator and parachute cords, wherein the canopy comprises a canopy upper part and a canopy lower part, the elastic canopy is sewn between the canopy upper part and the canopy lower part, a plurality of parachute cords are uniformly distributed on the bottom edge of the canopy lower part, and free end clusters of the parachute cords are connected with goods and materials to be airdropped; the shape of the covering canopy is matched with that of the elastic canopy, short canopy ropes connected with the bottom edge of the lower portion of the canopy are arranged on the periphery of the covering canopy, a restraint rope is connected to the center of the covering canopy, the other end of the restraint rope is connected with a to-be-thrown object, the covering canopy is pulled downwards from the middle to be in a V shape to be separated from the elastic canopy, a separator is arranged on the central rope, and the elastic canopy and the covering canopy are completely attached after the central rope is disconnected when the separator works.

Description

Single-umbrella load-shedding steady-descending parachute system

Technical Field

The invention belongs to the field of lifesaving, and particularly relates to a single-parachute unloading and stable-descending parachute system.

Background

The parachute opening process is an instant explosive process, so that the material speed of instant delivery is reduced, a large relative impact force is generated between the parachute and the object, the parachute can be damaged by the impact force, the airdrop material can be damaged, and if the resistance of the parachute to the airdrop material is too small, the object can be damaged by the falling speed. Therefore, in order to reduce the relative impact, the requirement of safe landing of materials is met. Generally, when designing a parachute, the parachute opening performance requirement is met, the strength of the parachute is guaranteed, aerial delivery objects are guaranteed within a safe impact range, and meanwhile, the safe landing requirement of a system is met. Therefore, some methods are selected for load shedding, such as: the umbrella type with small dynamic load for opening the umbrella is selected, the umbrella cover material with large air permeability is selected, the area of the top hole of the umbrella is enlarged, and the like.

But the umbrella type with small opening dynamic load generally has larger landing speed; the parachute-covering material with large air permeability is selected, the resistance of the parachute is reduced by increasing the area of the top hole of the parachute, and the area needs to be increased to make up for the requirement of safe landing; the multi-stage parachute opening is usually adopted, the system complexity is high, the reliability is low, and the system cost is increased.

In conclusion, the technical problems in the prior art are that the single parachute is instantaneously unfolded in the whole area and inflated in an inflated manner, so that the impact is large, and the landing speed is high; the multistage parachute opening has the advantages of high system complexity, low reliability and high system cost.

Disclosure of Invention

The purpose of the invention is: the safe single-umbrella load-shedding steady-falling parachute system reduces the impact force of parachute opening and ensures the safety of parachutes and airdropped goods and materials.

The technical scheme of the invention is as follows: a single-umbrella load-shedding steady-descending parachute system comprises a canopy, an elastic canopy, a covering canopy, short parachute cords, a restraint cord, a separator and parachute cords, wherein the canopy comprises a canopy upper part and a canopy lower part, the elastic canopy is sewn between the canopy upper part and the canopy lower part, a plurality of parachute cords are uniformly distributed on the bottom edge of the canopy lower part, and free ends of the parachute cords are bundled and connected with goods and materials to be airdropped; the shape of the covering canopy is matched with that of the elastic canopy, short canopy ropes connected with the bottom edge of the lower portion of the canopy are arranged on the periphery of the covering canopy, a restraint rope is connected to the center of the covering canopy, the other end of the restraint rope is connected with a to-be-thrown object, the covering canopy is pulled downwards from the middle to be in a V shape to be separated from the elastic canopy, a separator is arranged on the central rope, and the elastic canopy and the covering canopy are completely attached after the central rope is disconnected when the separator works.

In the above scheme, the length of the short umbrella rope can enable the covering umbrella cover to be attached to the elastic umbrella cover when the covering umbrella cover is completely unfolded. The elastic canopy is made of an elastic material.

In the scheme, the parachute system further comprises parachute cord buckles which are evenly sewn on the periphery of the lower portion of the canopy, and the retaining rings are connected with the short parachute cords.

In the above scheme, this parachute system still includes central rope, be equipped with the go-between on the separator, the go-between is restricted in separator main part, and on the central rope was connected to the other end, the parachute-opening starts the separation instruction in the twinkling of an eye, begins the separation of delaying, when the parachute is aerifyd and is accomplished steadily to descend, go-between and separator main part break away from, release central rope.

The invention has the beneficial effects that: the utility model provides a reduce parachute impact load, can also land safely and steadily method, take a round to use an elastic fabric material at parachute annular direction certain position, when the parachute is high-speed to expand, the parachute opening impact force is great, the elastic fabric is stretched, the fabric air permeability increases, can reduce the parachute opening impact force, and when the system steadily lands, the parachute elastic material contracts, and release little ventilative material and can cover elastic material, prevent its air permeability that increases the parachute, increase the resistance characteristic value of parachute, make the parachute land safely and steadily, have extensive using value. The single-umbrella parachute system has the advantages that the parachute can elastically stretch out and draw back when being opened at a high speed, the air permeability of the parachute is increased, the load shedding is realized, the system resistance is increased by covering the elastic seam when the parachute stably descends, and the landing speed of the parachute stably descends is reduced.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic drawing of the elastic canopy of the single parachute provided by the embodiment of the invention being stretched, unfolded and inflated.

Fig. 2 is a schematic view of the structure of the slightly breathable covering canopy shown in fig. 1.

FIG. 3 is a schematic view showing the stable descending of the cover canopy with micro-ventilation in combination with the parachute of the present invention.

In the figure, 1, a canopy, 2, an elastic canopy, 3, a covering canopy, 4, a short umbrella rope, 5, a restraint rope,

6. separator, 7 umbrella cord, 8 umbrella cord fastener

Detailed Description

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

As shown in fig. 1 to 3, which are illustrations of the parachute system according to the embodiment of the present invention, before the parachute works, the free end of the short parachute line 4 covering the canopy 3 is connected to the parachute line buckle 8 at the bottom end of the parachute canopy 1, and at the same time, the restraint line 5 covering the middle of the canopy 3 is pulled down to be connected to the separator 6, and then the whole parachute system is packaged and folded.

An elastic canopy 2 is made of flexible elastic material near a top hole of a parachute, a covering canopy 3 made of micro-breathable material capable of covering the whole is designed at the lower end of the elastic canopy 2, the elastic canopy 2 is separated from the covering canopy 3 in the initial parachute opening stage of the parachute, the shape of the elastic canopy 2 is the same as that of the covering canopy 3 and is slightly larger than that of the elastic canopy 2, a plurality of short canopy cords 4 are connected to the periphery of the covering canopy 3 and are respectively connected to the canopy cord buckles at the bottom end of the canopy of the parachute, the covering canopy 3 is pulled down from the middle to form a V shape, the elastic canopy 2 is completely exposed when the parachute is opened, when the canopy is inflated, the elastic canopy 2 is stretched due to the tension of the canopy, the ventilation of the whole canopy is increased, the dynamic load of the parachute opening can be reduced, when the parachute is in a stable descending state, the central cord restraint of the covering canopy 3 is released, and under the action of airflow, the shape of the covering canopy is consistent with the periphery of the center of the parachute, the released covering canopy 3 can be instantly fully opened, and due to the constraint of the short parachute cord, the canopy can be only attached to the elastic canopy 2 under the action of air flow, the elastic stretching part of the whole parachute is covered, and the resistance of the parachute can be further increased. The steady landing speed of the object is reduced, the landing can be steadily landed, and the safety requirement is met.

The separator is a common delay separation device for the parachute, the separator is started for delay when the parachute is unfolded, release restraint is achieved after separation time is reached, a small connecting ring is arranged on the separator and used for connecting the upper end of a central rope, the connecting ring is limited to the main part of the separator, a separation instruction is started at the moment of parachute opening to start delay separation, and when the parachute is inflated to finish stable descending, the connecting ring is separated from the main part of the separator to release the central rope.

When the parachute is unfolded and inflated in high-speed airflow, the parachute canopy 1 starts to be unfolded, and at the moment, the short canopy cords 4 and the restraint cords 5 on the covering canopy 3 restrain the covering canopy 3 to prevent the covering canopy 3 from being inflated at the moment. Because the air flow velocity is great when the parachute is opened and inflated, when the parachute canopy 1 is inflated and fully expanded, the elastic canopy 2 can be stretched at the same time, the air permeability of the parachute is increased, the parachute opening impact force can be reduced to a great extent, when the parachute system is inflated stably, the parachute begins to descend stably, at the moment, the separator 6 releases the end of the restraint rope 5, the covering canopy 3 is drawn close to the parachute canopy 1 in the air flow effect, and due to the restraint of the short canopy rope 4 and the covering canopy 3, the covering canopy 3 is just attached to the inner side of the parachute to shield the elastic canopy 2, the resistance characteristic value of the parachute can be increased, the stable material deceleration is reduced, and the landing safety of the system is improved.

Claims (5)

1. A single-umbrella load-shedding stable-descending parachute system comprises a canopy (1), an elastic canopy (2), a covering canopy (3), short parachute cords (4), restraining cords (5), separators (6) and parachute cords (7), and is characterized in that the canopy (1) comprises an upper portion of the canopy and a lower portion of the canopy, the elastic canopy (2) is sewn between the upper portion of the canopy and the lower portion of the canopy, a plurality of parachute cords (7) are uniformly distributed on the bottom edge of the lower portion of the canopy, and free ends of the parachute cords (7) are bundled and connected with goods and materials to be airdropped; the appearance of the covering canopy (3) is matched with that of the elastic canopy (2), a short canopy rope (4) connected with the bottom edge of the lower portion of the canopy is arranged on the periphery of the covering canopy, a restraint rope (5) is connected to the center of the covering canopy, the other end of the restraint rope (5) is connected with a to-be-thrown object, the covering canopy (3) is pulled down from the middle to form a V shape to be separated from the elastic canopy (2), a separator (6) is arranged on the center rope (5), and the elastic canopy (2) is completely attached to the covering canopy (3) after the center rope (5) is disconnected when the separator (6) works.

2. A single-parachute deloading stabilized landing parachute system according to claim 1, wherein the short parachute lines (4) have a length such that the covering canopy (3) will fit the flexible canopy (2) when fully deployed.

3. A single-umbrella load-shedding steady-drop parachute system as claimed in claim 1, wherein the elastic canopy (2) is made of an elastic material.

4. A single parachute deloading steady landing parachute system as claimed in claim 1, further comprising parachute cord fasteners (8), wherein the parachute cord fasteners (8) are sewn evenly around the lower periphery of the canopy and the snap rings are connected to the short parachute cords (4).

5. The single-umbrella load-shedding steady-descending parachute system according to claim 1, further comprising a center rope, wherein a connecting ring is arranged on the separator, the connecting ring is limited on the main part of the separator, the other end of the connecting ring is connected with the center rope, a separation instruction is started at the moment of parachute opening to start delayed separation, and when the parachute is inflated to finish steady descending, the connecting ring is separated from the main part of the separator to release the center rope.

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