Large ram wing parachute and parachute opening method

Abstract

A large-scale ram parafoil and an opening method thereof, relating to the field of ram parafoil. The large-scale ram parafoil comprises a ram parafoil body and a pull-top parachute, wherein the pull-top parachute is connected to the top of the intermediate air chamber of the ram parafoil body through a pull-top parachute connecting belt, and the pull-top parachute is connected to two pull-top parachute connecting ropes through a pull-top parachute center rope, and the tops of the two restraining air chambers on both sides of the ram parafoil body are respectively provided with a plurality of guide rings arranged at intervals along the deployment direction thereof, and the two pull-top parachute connecting ropes respectively pass through the corresponding guide rings connected to the tops of the two restraining air chambers, and the pull-top parachute connecting ropes are connected to each corresponding guide ring with at least one unidirectional elastic hook, and the unidirectional elastic hook is configured to pass through the corresponding guide ring in a unidirectional direction away from the intermediate air chamber. The large-scale ram parafoil and the opening method thereof provided by the present application can prolong the time of pulling the ram parafoil during the opening process, and avoid the damage caused by the rebound of the parachute rope due to the difficulty in inflating the ram parafoil, which causes the resistance generated by the deployment area to be insufficient to support its weight.

Description

Technical Field

[0001] The present application relates to the field of rammed parafoils, and in particular to a large rammed parafoil and a method for opening the parafoil. Background Art

[0002] The opening process of a ram wing parachute is very complicated, and there are also significant differences between the opening of a small ram wing parachute and a large ram wing parachute. During the United States' research on the X-38 large ram wing parachute, it was found in its early tests that large ram wing parachutes often suffer serious damage during the opening process. This damage is mainly caused by the high-speed contact between the parachute rope and the canopy. The cause of the damage is believed to be the elastic rebound of the parachute rope. This is because the large weight of the canopy results in a large inertial force at the moment of opening, and its instantaneous expansion area is not enough to provide enough resistance surface to offset this inertial force, causing the parachute rope of the ram wing parachute to rebound after the canopy is inflated during the fall. In order to reduce the damage to the canopy caused by this rope rebound, an energy regulating rope is generally used to pull the canopy. However, since the length of the energy regulating rope cannot be designed to be too long, its effect is limited and the result is not satisfactory.

[0003] When a large ram wing parachute is opened, when the parachute is pulled out from the parachute bag, the aerodynamic surface initially presented is very small relative to the airflow. As a result, the inertial force generated in the process of reducing the speed of the large ram wing parachute and the load to zero exceeds the direct aerodynamic force when the large ram wing parachute is pulled out. This imbalance of force will cause the parachute ropes of the large ram wing parachute to relax, causing the parachute ropes to hit the canopy and whip, which can easily cause regional burns and damage to the canopy of the large ram wing parachute during the high-speed whipping.

[0004] Therefore, a method is needed to solve the problem of the canopy of a large ram wing parachute being damaged by the rebound of the parachute rope when the canopy is unfolded. Summary of the invention

[0005] The purpose of the present application is to provide a large-scale ram wing parachute and a parachute opening method, which can prolong the time of pulling the ram wing parachute during the parachute opening process, thereby avoiding damage caused by the rebound of the parachute rope due to the resistance generated by the expanded area of ​​the ram wing parachute being insufficient to support its weight.

[0006] The embodiment of the present application is implemented as follows:

[0007] An embodiment of the present application provides a large-scale ram wing parachute, which includes a ram wing parachute body and a pull-top parachute. The pull-top parachute is connected to the top of the intermediate air chamber of the ram wing parachute body through a pull-top parachute connecting belt. The pull-top parachute is connected to two pull-top parachute connecting ropes through a pull-top parachute center rope. The tops of the two restraining air chambers on both sides of the ram wing parachute body are respectively provided with a plurality of guide rings arranged at intervals along their deployment direction. The two pull-top parachute connecting ropes respectively pass through the corresponding guide rings connected to the tops of the two restraining air chambers. The pull-top parachute connecting ropes are connected to each corresponding guide ring with at least one unidirectional elastic hook, and the unidirectional elastic hook is configured to pass through the corresponding guide ring in one direction away from the intermediate air chamber.

[0008] In some optional embodiments, the one-way elastic hook is connected to the corresponding guide ring through a strong rope that breaks when subjected to a preset tension.

[0009] In some optional embodiments, the preset tension of the strong rope gradually decreases as approaching the intermediate air chamber.

[0010] In some optional embodiments, a plurality of guide ring auxiliary belts are further included, both ends of the guide ring auxiliary belts are respectively connected to the ribs of the stamped parafoil body, and each guide ring auxiliary belt passes through at least one guide ring.

[0011] In some optional embodiments, the top parachute connecting strap is connected to the top of the ram parafoil body through a plurality of top parafoil pulling straps.

[0012] In some optional embodiments, two pull-top parachute connecting ropes are symmetrically arranged on both sides of the pull-top parachute connecting belt.

[0013] In some optional embodiments, the one-way elastic hook is connected to the corresponding guide ring.

[0014] The present application also provides a method for opening the large ram wing parachute, comprising the following steps:

[0015] When opening the parachute, first pull the lead parachute out of the parachute bag, and the lead parachute pulls the top of the ram parafoil body through the lead parachute connecting belt, and at the same time pulls the two sides of the top of the ram parafoil body through two lead parachute connecting ropes, so that the middle air chamber of the ram parafoil body is fully inflated and then starts to inflate the restraining air chamber;

[0016] As the restraining air chamber begins to inflate, the slack part of the draw parachute connecting rope connected to the top of the restraining air chamber is straightened as the restraining air chamber inflates and expands. In the process of the center rope of the draw parachute being straightened, the positions of the corresponding one-way elastic hooks are respectively limited by the guide rings until the restraining air chamber and the edge air chamber are fully expanded, so that the downward pulled center rope of the draw parachute pulls down the center of the draw parachute, making the draw parachute ineffective, until the ram wing parachute body glides stably.

[0017] The beneficial effects of the present application are as follows: the large-scale ram parafoil provided by the present application comprises a ram parafoil body and a pull-top parachute, the pull-top parachute is connected to the top of the middle air chamber of the ram parafoil body through a pull-top parachute connecting belt, the pull-top parachute is connected to two pull-top parachute connecting ropes through a pull-top parachute center rope, the tops of the two restraining air chambers on both sides of the ram parafoil body are respectively provided with a plurality of guide rings arranged at intervals along the deployment direction thereof, the two pull-top parachute connecting ropes respectively pass through the corresponding guide rings connected to the tops of the two restraining air chambers, the pull-top parachute connecting ropes are connected to each corresponding guide ring with at least one unidirectional elastic hook, and the unidirectional elastic hook is configured to pass through the corresponding guide ring in a unidirectional direction away from the middle air chamber. The large-scale ram parafoil and the parachute opening method provided by the present application can prolong the time of pulling the ram parafoil in the parachute opening process, thereby avoiding the damage caused by the rebound of the parachute rope caused by the resistance generated by the deployment area of ​​the ram parafoil being insufficient to support its weight, and can avoid disorderly deployment which makes it difficult for the ram parafoil to be inflated, and the purpose of delaying and reducing the parachute opening overload is achieved by orderly controlling its inflation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of the inflation process of a large ram parafoil provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of a large ram parafoil provided in an embodiment of the present application when fully inflated;

[0021] Figure 3 A schematic diagram of the structure of a large ram wing parachute provided in an embodiment of the present application

[0022] Figure 4 A schematic diagram of the partial structure of the connection between the tow parachute connecting rope and the guide ring of the large ram wing parachute provided in an embodiment of the present application.

[0023] In the figure: 100, ram parafoil body; 110, lead parachute; 120, lead parachute connecting belt; 130, lead parachute center rope; 140, lead parachute connecting rope; 141, connection point; 150, guide ring; 160, elastic hook; 170, strong rope; 180, guide ring auxiliary belt; 190, wing rib; 200, parafoil lead belt; 210, intermediate air chamber; 220, constraint air chamber; 230, edge air chamber. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The features and performance of the large ram wing parachute and the parachute opening method of the present application are further described in detail below in conjunction with the embodiments.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the embodiment of the present application provides a large-scale ram parafoil, which includes a ram parafoil body 100 and a pull-top parachute 110. The ram parafoil body 100 has an intermediate air chamber 210, two constraint air chambers 220 located on both sides of the intermediate air chamber 210, and two edge air chambers 230. The two intermediate air chambers 210 are respectively located on the side of the two constraint air chambers 220 away from the intermediate air chamber 210; the pull-top parachute 110 is respectively connected to a pull-top parachute connecting belt 120 and a pull-top parachute center rope 130. The pull-top parachute connecting belt 120 is connected to eight wing parachute pull-top belts 200. The eight wing parachute pull-top belts 200 are respectively connected to the ribs 190 at the top of the intermediate air chamber 210 of the ram parafoil body 100. The pull-top parachute center rope 130 is connected to two pull-top parachute connecting ropes 140 symmetrically arranged on both sides of the pull-top parachute connecting belt 120. The tops of the two constraint air chambers 220 on both sides of the ram parafoil body 100 are respectively provided with six pull-top parachute connecting ropes that are unfolded along them. The guide rings 150 are arranged in a spaced-apart manner in the direction of rotation, and each guide ring 150 is sleeved on a guide ring auxiliary belt 180. The two ends of each guide ring auxiliary belt 180 are respectively connected to the ribs 190 of the ram wing parachute body 100. The two top parachute connecting ropes 140 respectively pass through the corresponding guide rings 150 connected to the tops of the two constraint air chambers 220. Each top parachute connecting rope 140 is provided with six connection points 141 corresponding to the six guide rings 150 passed through. Each connection point 141 is connected to four unidirectional elastic hooks 160. The four unidirectional elastic hooks 160 connected to each connection point 141 are respectively connected to the corresponding guide rings 150 through a strong rope 170 that breaks when subjected to a preset tension. The unidirectional elastic hook 160 can only move in one direction toward away from the intermediate air chamber 210 and pass through the corresponding guide ring 150. The preset tension of the strong rope 170 gradually decreases as it approaches the intermediate air chamber 210.

[0033] The present application also provides a method for opening the large ram wing parachute, comprising the following steps:

[0034] When opening the parachute, first pull the lead parachute 110 out of the parachute bag, and the lead parachute 110 pulls the middle air chamber 210 on the top of the ram parafoil body 100 through the lead parachute connecting belt 120, and at the same time pulls the restraining air chambers 220 on both sides of the top of the ram parafoil body 100 through two lead parachute connecting ropes 140, so that the middle air chamber 210 of the ram parafoil body 100 is fully inflated and then starts to inflate the restraining air chamber 220;

[0035] As the restraining air chamber 220 begins to inflate, the slack portion of the parachute connecting rope 140 connected to the top of the restraining air chamber 220 is straightened as the restraining air chamber is inflated and expanded. During the straightening process of the parachute connecting rope 140, the guide ring 150 moves to successively break the strong rope 170 and make the corresponding one-way elastic hook 160 pass through the corresponding guide ring 150 in a direction away from the intermediate air chamber 210 until the restraining air chamber 220 is fully inflated, and the parachute connecting rope is driven by the moving guide ring 150. 140 pulls down the center rope 130 of the lead parachute, thereby using the pulled-down center rope 130 to pull down the center of the lead parachute 110 to make the lead parachute 110 ineffective and reduce the resistance to the ram wing parachute body 100, until the edge air chamber 230 is fully expanded, the center rope 130 of the lead parachute is restrained by the one-way elastic hook 160 and the guide ring 150 and cannot rebound, thereby reducing the resistance of the lead parachute 110 to the ram wing parachute body 100 and allowing the ram wing parachute body 100 to glide stably.

[0036] The large-scale ram wing parachute and the method for opening the parachute provided by the embodiment of the present application are provided with a lead parachute 110, and the lead parachute 110 is connected to the top of the intermediate air chamber 210 of the ram wing parachute body 100 through the lead parachute connecting belt 120 and eight wing parachute lead belts 200, and the lead parachute 110 is passed through the lead parachute center rope 130 and two lead parachute connecting ropes 140 and is limited to the six guide rings 150 connected to the top of the constraint air chamber 220 on both sides of the top of the ram wing parachute body 100 and arranged at intervals along its deployment direction, and a strong rope 170 that is disconnected when a preset tension is received is used to connect the unidirectional elastic hook 160 and the corresponding guide ring 150. When the large-scale ram wing parachute starts to work and open the parachute, the lead parachute 110 is first pulled open and the lead parachute is pulled The parachute connecting belt 120 and eight parafoil pulling belts 200 pull the upper wing surface of the ram parafoil body 100 to make the ram parafoil body 100 start to inflate. When the entire air chamber of the ram parafoil body 100 is unfolded, the center rope 130 of the pulling parachute is gradually pulled down as the air chamber is unfolded, and the one-way elastic hook 160 passing through the corresponding guide ring 150 cannot return to the previous position when the air chamber is fully expanded. As the center rope 130 of the pulling parachute is pulled down, the center of the pulling parachute 110 is pulled down, and the canopy of the pulling parachute 110 turns down into a funnel shape and becomes ineffective. After the ram parafoil body 100 is fully inflated, the aerodynamic resistance of the funnel-shaped pulling parachute 110 is small, and the influence on the stable gliding performance of the ram parafoil body 100 can be ignored.

[0037] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A large-scale ram parafoil, comprising a ram parafoil body, characterized in that: It also includes a pull-top parachute, which is connected to the top of the intermediate air chamber of the ram wing parachute body through a pull-top parachute connecting belt, and the pull-top parachute is connected to two pull-top parachute connecting ropes through a pull-top parachute center rope. The tops of the two restraining air chambers on both sides of the ram wing parachute body are respectively provided with a plurality of guide rings arranged at intervals along their deployment direction, and the two pull-top parachute connecting ropes respectively pass through the corresponding guide rings connected to the tops of the two restraining air chambers, and the pull-top parachute connecting rope is connected to each corresponding guide ring with at least one unidirectional elastic hook, and the unidirectional elastic hook is configured to pass through the corresponding guide ring unidirectionally in a direction away from the intermediate air chamber.

2. The large ram parafoil according to claim 1, characterized in that: The one-way elastic hook is connected to the corresponding guide ring through a strong rope that breaks when subjected to a preset pulling force.

3. The large ram parafoil according to claim 2, characterized in that: The preset tension of the strong rope gradually decreases as it approaches the intermediate air chamber.

4. The large ram parafoil according to claim 1, characterized in that: It also includes a plurality of guide ring auxiliary belts, both ends of which are respectively connected to the wing ribs of the stamped parafoil body, and each of the guide ring auxiliary belts passes through at least one guide ring.

5. The large ram parafoil according to claim 1, characterized in that: The top-pulling parachute connecting belt is connected to the top of the stamped parafoil body through a plurality of parafoil top-pulling belts.

6. The large ram parafoil according to claim 1, characterized in that: Two pull-top parachute connecting ropes are symmetrically arranged on both sides of the pull-top parachute connecting belt.

7. The large ram parafoil according to claim 1, characterized in that: The one-way elastic hook is connected to the corresponding guide ring.

8. The method for opening a large ram wing parachute according to any one of claims 1 to 7, characterized in that: The following steps are involved: When opening the parachute, first pull the lead parachute out of the parachute bag, and the lead parachute pulls the top of the ram parafoil body through the lead parachute connecting belt, and at the same time pulls the two sides of the top of the ram parafoil body through two lead parachute connecting ropes, so that the middle air chamber of the ram parafoil body is fully inflated and then starts to inflate the restraining air chamber; As the restraining air chamber begins to inflate, the slack part of the pull-top parachute connecting rope connected to the top of the restraining air chamber is straightened as the restraining air chamber is inflated and expanded, and in the process of the pull-top parachute center rope being straightened, the positions of the corresponding one-way elastic hooks are respectively limited by the guide ring until the restraining air chamber and the edge air chamber are fully inflated, so that the downward pulled pull-top parachute center rope pulls down the center of the pull-top parachute to make the pull-top parachute invalid until the ram wing parachute body glides stably.

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