A single parachute load-reducing and stable descent parachute system

Abstract

The invention provides a single-parachute load-reducing and steady-descent parachute system, comprising a canopy, an elastic canopy, a covering canopy, short parachute ropes, a restraint rope, a separator and parachute ropes. 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 ropes are evenly distributed on the bottom edge of the canopy lower part, the free ends of the parachute ropes are bundled and connected with materials to be airdropped; the outer shape of the covering canopy is matched with the elastic canopy, short parachute ropes connected with the bottom edge of the canopy lower part are arranged around the periphery, a restraint rope is connected at the center, the other end of the restraint rope is connected with the material to be airdropped, so that the covering canopy is pulled down from the middle into a V-shape and separated from the elastic canopy, and a separator is arranged on the center rope, and when the separator works, the elastic canopy and the covering canopy are completely fitted after the center rope is disconnected.

Description

Technical Field

[0001] The invention belongs to the field of lifesaving, and in particular relates to a single-parachute load-reducing and steady-descent parachute system. Background Art

[0002] The parachute opening process is an instantaneous burst process. To reduce the speed of the instantly dropped materials, a large relative impact force will be generated between the parachute and the object. This impact force will either damage the parachute or the airdropped materials. If the parachute has too little resistance to the airdropped materials, the object will fall too fast and be damaged. Therefore, in order to reduce this relative impact and meet the requirements for safe landing of materials. Generally, when designing a parachute, it is necessary to meet the opening performance requirements, ensure the strength of the parachute, and ensure that the airdropped materials are within the safe impact range. At the same time, it is also necessary to meet the safe landing requirements of the system. Therefore, some methods will be used to reduce the load, such as: choosing an umbrella type with a small dynamic load when opening the parachute, choosing an umbrella material with a large air permeability, and increasing the area of ​​the top hole of the umbrella.

[0003] However, parachutes with small dynamic loads during opening generally have higher landing speeds. Selecting canopy materials with high air permeability and increasing the area of ​​the top holes will reduce the parachute resistance. In order to meet the requirements of safe landing, the area must be increased to compensate. The commonly used multi-stage opening system has a high degree of system complexity, low reliability, and increased system costs.

[0004] In summary, the technical problems existing in the prior art are that the instantaneous inflation of the entire area of ​​a single parachute causes a large impact and a high steady landing speed; the multi-stage parachute opening results in a high system complexity, low reliability and high system cost. Summary of the invention

[0005] The purpose of the present invention is to provide a single-parachute load-reducing and stable-descent parachute system which can reduce the impact force of parachute opening and ensure the safety of the parachute and airdropped materials.

[0006] The technical scheme of the present invention is: a single-parachute load-reducing and stable-descent parachute system, comprising a canopy, an elastic canopy, a covering canopy, short parachute ropes, a restraint rope, a separator and parachute ropes, the canopy comprising 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 ropes are evenly distributed on the bottom edge of the canopy lower part, the free ends of the parachute ropes are bundled and connected with materials to be airdropped; the outer shape of the covering canopy is adapted to the elastic canopy, short parachute ropes connected to the bottom edge of the canopy lower part are arranged around the periphery, a restraint rope is connected at the center, the other end of the restraint rope is connected with the material to be airdropped, so that the covering canopy is pulled down from the middle into a V-shape and separated from the elastic canopy, a separator is arranged on the center rope, and when the separator works, the elastic canopy and the covering canopy are completely fitted after the center rope is disconnected.

[0007] In the above solution, the length of the short parachute rope can make the covering parachute fit with the elastic parachute when the covering parachute is fully unfolded. The elastic parachute is made of elastic material.

[0008] In the above scheme, the parachute system also includes a parachute cord buckle, which is evenly sewn around the lower part of the parachute canopy and has a buckle ring connected to the short parachute cord.

[0009] In the above scheme, the parachute system also includes a center rope. The separator is provided with a connecting ring, which is restricted to the main part of the separator and the other end is connected to the center rope. The separation command is activated at the moment of parachute opening to start delayed separation. When the parachute is inflated and a steady descent is completed, the connecting ring is detached from the main part of the separator and the center rope is released.

[0010] The beneficial effects of the present invention are: providing a method for reducing the impact load of a parachute and achieving safe and steady landing, taking a circle of an elastic fabric material at a certain position in the annular direction of the parachute, when the parachute is deployed at high speed, the impact force of the parachute opening is large, the elastic fabric is stretched, the air permeability of the fabric increases, and the impact force of the parachute opening can be reduced, and when the system is steadily descending, the elastic material of the parachute retracts, and the released micro-permeable material can cover the elastic material, preventing it from increasing the air permeability of the parachute, increasing the characteristic value of the resistance of the parachute, so that the parachute can land safely and steadily, and has a wide range of application value. A single parachute system that can elastically expand and contract when opening the parachute at high speed, increase the air permeability of the parachute to reduce the load, cover the elastic seam during steady descent to increase the system resistance, and reduce the steady landing speed, at the same time, the system has a smaller area, a redundancy in design strength, a small packaging volume, a lighter weight, and has the characteristics of good parachute opening performance and safe landing of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0012] Figure 1 A schematic diagram of the stretching, unfolding and inflating of the elastic canopy of a single-parachute parachute provided in an embodiment of the present invention.

[0013] Figure 2 For the present invention Figure 1 Schematic diagram of the structure of a medium-slightly breathable canopy.

[0014] Figure 3 It is a schematic diagram of the present invention's micro-permeable canopy and parachute combined for steady descent.

[0015] In the figure, 1. canopy, 2. elastic canopy, 3. covering canopy, 4. short canopy rope, 5. restraining rope,

[0016] 6. Separator, 7. Paracord, 8. Paracord buckle DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0018] like Figures 1 to 3As shown, it is a diagram of a parachute system provided by an embodiment of the present invention. Before the parachute works, the free end of the short parachute rope 4 on the covering canopy 3 is connected to the parachute rope buckle 8 at the bottom end of the parachute canopy 1. At the same time, the restraint rope 5 in the middle of the covering canopy 3 is pulled down to connect with the separator 6, and then the entire parachute system is packed and folded.

[0019] An elastic canopy 2 is made of a flexible and elastic material near the top hole of the parachute, and a covering canopy 3 made of a micro-breathable material that can fully cover the lower end of the elastic canopy 2 is designed. In the early stage of parachute opening, the elastic canopy 2 is separated from the covering canopy 3, and the elastic canopy 2 has the same shape as the covering canopy 3 and is slightly larger than the elastic canopy 2. A number of short parachute ropes 4 are connected to the periphery of the covering canopy 3 and are respectively connected to the parachute rope 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. When the parachute is opened, the elastic canopy 2 When the canopy is fully exposed, due to the tension of the canopy, the elastic canopy 2 will be stretched, increasing the air permeability of the entire canopy, and reducing the dynamic load of the parachute opening. When the parachute is in a stable descent state, at this time, the central rope constraint of the covering canopy 3 is released. Under the action of the airflow, since its shape is consistent with the periphery of the center of the parachute, the released covering canopy 3 will be instantly fully opened. Due to the short canopy rope constraint, its canopy will only stick to the elastic canopy 2 under the action of the airflow, and the elastic stretching part of the entire parachute will be covered, and the resistance of the parachute will be further increased. The steady descent speed of the object is reduced, and it can land steadily, meeting the safety requirements.

[0020] The separator is a delayed separation device commonly used for parachutes. The delay is started when the parachute is deployed, and the constraint is released after the separation time is reached. There is a small connecting ring on the separator, which is used to connect the upper end of the center rope, and the connecting ring is restricted to the main part of the separator. The separation command is started at the moment of parachute opening, and the delayed separation begins. When the parachute is inflated and completes a steady descent, the connecting ring is separated from the main part of the separator and the center rope is released.

[0021] When the parachute is unfolded and inflated in the high-speed airflow, the parachute canopy 1 begins to unfold. At this time, the short parachute rope 4 and the restraining rope 5 on the covering canopy 3 restrain the covering canopy 3 to prevent the covering canopy 3 from being inflated. Since the airflow speed is relatively high when the parachute is opened and inflated, when the parachute canopy 1 is fully inflated, the elastic canopy 2 will be stretched at the same time, and the air permeability of the parachute will increase, which can greatly reduce the impact of the opening of the parachute. When the parachute system is inflated and stabilized, it starts to descend steadily. At this time, the separator 6 releases the end of the restraining rope 5, and the covering canopy 3 moves closer to the parachute canopy 1 under the action of the airflow. Due to the restraint of the short parachute rope 4 and the covering canopy 3 itself, the covering canopy 3 just fits the inner side of the parachute, shielding the elastic canopy 2, and the resistance characteristic value of the parachute will increase, so that the steady descent speed of the materials is reduced, and the landing safety of the system is increased.

Claims

1. A single parachute load-reducing and steady-descent parachute system, comprising a canopy (1), an elastic canopy (2), a covering canopy (3), short parachute lines (4), a center line (5), a separator (6) and parachute lines (7), characterized in that: The canopy (1) comprises a canopy upper part and a canopy lower part, an elastic canopy (2) is sewn between the canopy upper part and the canopy lower part, a plurality of parachute ropes (7) are evenly distributed on the bottom edge of the canopy lower part, and the free ends of the parachute ropes (7) are bundled and connected to the materials to be airdropped; the outer shape of the covering canopy (3) is matched with the elastic canopy (2), and short parachute ropes (4) connected to the bottom edge of the canopy lower part are arranged around the periphery, and a central rope (5) is connected at the center, and the other end of the central rope (5) is connected to the materials to be airdropped, so that the covering canopy (3) is pulled down from the middle into a V-shape and separated from the elastic canopy (2), and a separator (6) is arranged on the central rope (5), and when the separator (6) is in operation, the elastic canopy (2) and the covering canopy (3) are completely fitted after the central rope (5) is disconnected.

2. A single parachute load-reducing and stable descent parachute system according to claim 1, characterized in that: The length of the short parachute rope (4) enables the covering parachute (3) to fit closely with the elastic parachute (2) when the covering parachute (3) is fully unfolded.

3. A single parachute load-reducing and steady-descent parachute system according to claim 1, characterized in that: The elastic canopy (2) is made of elastic material.

4. The single parachute load-reducing and stable descent parachute system according to claim 1, characterized in that: The parachute system also includes an umbrella cord buckle (8), which is evenly sewn around the lower part of the umbrella canopy and has a buckle ring connected to the short umbrella cord (4).

5. The single parachute load-reducing and stable descent parachute system according to claim 1, characterized in that: The separator (6) is provided with a connecting ring which is restricted to the main part of the separator and the other end of which is connected to the central rope (5). The separation command is activated at the moment of parachute opening to start delayed separation. When the parachute is inflated and the stable descent is completed, the connecting ring is separated from the main part of the separator (6) and the central rope (5) is released.

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