Variable drag face parachute and method of opening
By designing the parachute lines and connecting straps of the variable drag surface parachute and using a time-delay separator to control the deployment of the canopy, the problem of impact overload during high-speed deployment is solved, achieving simple and efficient multi-stage deceleration and safe landing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- AEROSPACE LIFE SUPPORT IND LTD
- Filing Date
- 2023-10-26
- Publication Date
- 2026-06-09
AI Technical Summary
When the existing airdrop system is deployed at high speed, the direct deployment of a single parachute can easily lead to a large impact overload, damaging the parachute and the airdropped goods. Multi-stage parachute deployment control is complex and costly.
The system employs a variable drag surface parachute. Through the design of the parachute lines and connecting straps, a time-delay separator is used to control the inflation and deployment of the canopy, thereby adjusting the deployment area of the deceleration parachute and achieving gradual deceleration.
It effectively reduces the impact of parachute deployment, achieves continuous multi-stage deceleration, reduces system complexity and cost, and ensures the safe landing of airdropped goods.
Smart Images
Figure CN117302523B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of parachutes, and more specifically, to a variable drag surface parachute and a method for opening the parachute. Background Technology
[0002] Generally, it is not possible for airdrop systems to deploy a single parachute directly after a high-speed drop and then make a stable landing while ensuring the safety of the airdrop system. This is mainly because under high-speed parachute deployment conditions, the large area of the parachute expands instantaneously, creating a large speed difference between the parachute and the airdropped object. Due to inertial forces, a large impact overload will be generated, which will cause devastating damage to the parachute itself. For the airdropped object, a large impact overload will lead to its destruction.
[0003] To avoid the above situation, airdrop systems generally use multi-stage parachutes to gradually decelerate the system during high-speed deployment, ultimately achieving the goal of the main parachute deploying and carrying supplies to a safe landing. However, in actual use, the deployment sequence control of multi-stage parachutes is complex, the number of parachute systems is large, the weight is increased, and the cost is raised.
[0004] Therefore, a parachute with a simple structure that can reduce the number of parachutes in the airdrop system is needed to meet the requirements of high-speed airdrop. Summary of the Invention
[0005] The purpose of this application is to provide a variable drag surface parachute and a method for opening the parachute, which can constrain the degree of full inflation of the parachute can be controlled by constraining the parachute lines, thereby adjusting the deployment area of the deceleration parachute according to the opening requirements.
[0006] This application is implemented as follows:
[0007] This application provides a variable drag surface parachute, which includes a deceleration parachute, at least two sets of parachute lines connected to the deceleration parachute, connecting straps corresponding to each set of parachute lines, and at least one time-delay separator. Each set of parachute lines is arranged circumferentially along the deceleration parachute, and each set of parachute lines is arranged radially along the deceleration parachute. One end of the connecting strap is connected to each parachute line in the corresponding set, and the other end is used to connect to the top of the parachute. The connecting straps corresponding to each set of parachute lines on the inner side are connected to the top of the parachute through a time-delay separator. The length of each connecting strap corresponding to each set of parachute lines increases sequentially from the inside to the outside. Each time-delay separator corresponding to each set of parachute lines cuts off the corresponding connecting strap sequentially from the inside to the outside after a preset time interval.
[0008] In some alternative implementations, the deceleration parachute is connected to cord buckles that correspond one-to-one with the parachute cords.
[0009] In some alternative implementations, the parachute is connected to the middle of the connecting strip corresponding to the innermost set of parachute lines via a fixing rope. When the time-delay separator corresponding to the innermost parachute line cuts the corresponding connecting strip, the sum of the lengths of the fixing rope and the cut connecting strip is greater than that of the outer connecting strip.
[0010] This application also provides a method for deploying the above-mentioned variable drag surface parachute, which includes the following steps:
[0011] Step 1: Connect the variable drag surface deceleration parachute to the parachute and airdrop it.
[0012] Step 2: When the parachute opens, the connecting straps corresponding to the innermost set of parachute lines pull the middle canopy under force, causing the middle canopy to inflate fully.
[0013] Step 3: The delay separator connected to the innermost set of parachute lines cuts the corresponding connecting strap at the predetermined time, causing the middle canopy to be impacted by the airflow and move upward. The outer canopy of the middle canopy begins to inflate and tighten, which in turn pulls the connecting straps of the outermost set of parachute lines to tighten until the outer canopy of the middle canopy is fully inflated. Repeat Step 3 until all connecting straps of each set of parachute lines are tightened, so that the deceleration parachute is fully inflated.
[0014] The beneficial effects of this application are as follows: The variable drag surface parachute provided by this application includes a deceleration parachute, and further includes at least two sets of parachute lines connected to the deceleration parachute, connecting straps corresponding to each set of parachute lines, and at least one time-delay separator. Each set of parachute lines is arranged circumferentially along the deceleration parachute, and each set of parachute lines is arranged radially along the deceleration parachute. One end of the connecting strap is connected to each parachute line of the corresponding set, and the other end is used to connect to the top of the parachute. The connecting straps corresponding to each set of parachute lines on the inner side are connected to the top of the parachute through a time-delay separator. The length of each connecting strap corresponding to each set of parachute lines increases sequentially from the inside to the outside. Each time-delay separator corresponding to each set of parachute lines cuts off the corresponding connecting strap sequentially from the inside to the outside after a preset time interval. The variable drag surface parachute and opening method provided by this application constrain the degree of full inflation of the canopy by constraining the parachute lines, thereby allowing the deployment area of the deceleration parachute to be adjusted according to the opening requirements. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 A schematic diagram of the variable drag surface parachute in operation according to an embodiment of this application;
[0017] Figure 2 A schematic diagram of the central canopy of the variable drag surface parachute provided in this application embodiment after inflation and deployment;
[0018] Figure 3 A schematic diagram of the variable drag surface parachute provided in this application embodiment after both the central canopy and the side canopies are inflated and deployed;
[0019] Figure 4 This is a schematic diagram from another perspective of the variable drag surface parachute provided in an embodiment of this application.
[0020] In the diagram: 100, deceleration parachute; 101, center canopy; 102, edge canopy; 110, center parachute lines; 111, edge parachute lines; 120, first connecting strap; 121, second connecting strap; 130, delay separator; 140, rope buckle; 150, securing rope; 200, parachute. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0022] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0024] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0025] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0026] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0028] The following detailed description of the features and performance of the variable drag surface parachute and deployment method of this application, in conjunction with embodiments, provides further insight into their specifics.
[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this application embodiment provides a variable drag surface parachute, which includes a deceleration parachute 100. The deceleration parachute 100 is composed of a central canopy 101 located in the middle and an edge canopy 102 located outside the central canopy 101. Four rope buckles 140, arranged circumferentially around the deceleration parachute 100, are respectively connected to the edges of the central canopy 101 and the edge canopy 102. Each of the four rope buckles 140 on the edge of the central canopy 101 is connected to a central parachute line 110, and each of the four rope buckles 140 on the edge of the edge canopy 102 is connected to an edge parachute line 111. A first connecting strap 120 is connected to the end of each of the four central parachute lines 110 away from the deceleration parachute 100. The other end of the first connecting strap 120 is connected to the top of the parachute 200. A time-delay separator 130 is provided in the middle of the first connecting strap 120. The time-delay separator 130 is used to cut the first connecting strap 120 after a preset time interval. The middle of the first connecting strap 120 is connected to the top of the parachute 200 through a fixing rope 150. After the time-delay separator 130 cuts the first connecting strap 120, the sum of the lengths of the cut first connecting strap 120 and the fixing rope 150 is greater than the length of the second connecting strap 121. One end of the four edge parachute lines 111 is connected to the second connecting strap 121. The other end of the second connecting strap 121 is connected to the top of the parachute 200. The length of the first connecting strap 120 is less than that of the second connecting strap 121.
[0030] This application also provides a method for deploying the above-mentioned variable drag surface parachute, which includes the following steps:
[0031] Step 1: Connect the first connecting strap 120, the second connecting strap 121, and the fixing rope 150 of the variable drag surface deceleration parachute to the top surface of the parachute 200, and then airdrop the variable drag surface deceleration parachute and the parachute 200.
[0032] Step 2: When the parachute 200 opens, the shortest first connecting strap 120 pulls the four middle parachute lines 110, causing the edges of the central canopy 101 to be stressed. This causes the central canopy 101 to be stressed first and begin to inflate until it is fully inflated. At this time, the deceleration parachute 100 only opens the central canopy 101, and the opening area is relatively small.
[0033] Step 3: After the delay separator 130 reaches the predetermined time, it cuts the corresponding first connecting belt 120, causing the tension fixing rope 150 in the middle of the first connecting belt 120 to loosen. The sum of the lengths of the cut first connecting belt 120 and the fixing rope 150 is greater than the length of the second connecting belt 121, causing the central canopy 101 to be impacted by the airflow and move upward. The outer edge canopy 102 of the central canopy 101 begins to inflate and tighten, driving the four edge parachute ropes 111 to tighten until the outer edge canopy 102 of the central canopy 101 is fully inflated, so that both the central canopy 101 and the edge canopy 102 of the deceleration parachute 100 are fully inflated, the opening area reaches the maximum, and the parachute 200 decelerates and descends stably.
[0034] The variable drag surface parachute and deployment method provided in this application embodiment use a first connecting strap 120 and a second connecting strap 121, whose lengths gradually increase from the inside to the outside, to constrain different parts of the deceleration parachute 100 to be fully inflated in sequence. This allows the deployment area of the deceleration parachute 100 to be adjusted according to the deployment requirements. This provides continuous multi-stage deceleration for high-speed deployment of small airdrop systems, effectively reducing the impact of parachute deployment and meeting the deceleration and load reduction requirements of general airdrop systems.
[0035] The first connecting strap 120 is connected to the top of the parachute 200 via a fixing rope 150. After the delay separator 130 cuts the first connecting strap 120, the sum of the lengths of the cut first connecting strap 120 and the fixing rope 150 is greater than the length of the second connecting strap 121. This allows the camping fixing rope 150 to constrain the position of the cut first connecting strap 120, preventing the first connecting strap 120 from getting tangled in the edge parachute rope 111 and affecting the opening process.
[0036] In other optional embodiments, the variable drag surface parachute may also include three or more sets of parachute lines, each set of parachute lines being connected to the top of the parachute via a corresponding connecting strap, and the connecting strap corresponding to each set of parachute lines on the inner side being connected to the top of the parachute 200 via a time-delay separator 130. The length of the connecting straps corresponding to each set of parachute lines increases sequentially from the inside to the outside, and each time-delay separator corresponding to each set of parachute lines cuts off the corresponding connecting strap sequentially from the inside to the outside after a preset time interval.
[0037] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
Claims
1. A variable drag surface parachute, comprising a drag chute, characterized in that, It also includes at least two sets of parachute lines connected to the deceleration parachute, connecting straps corresponding to each set of parachute lines, and at least one time-delay separator. Each set of parachute lines is arranged circumferentially around the deceleration parachute, and each set of parachute lines is arranged radially around the deceleration parachute. One end of the connecting strap is connected to each parachute line in the corresponding set, and the other end is used to connect to the top of the parachute. The connecting straps corresponding to each set of parachute lines on the inner side are connected to the top of the parachute through a time-delay separator. The length of each connecting strap corresponding to each set of parachute lines increases sequentially from the inside to the outside. Each time-delay separator corresponding to each set of parachute lines cuts the corresponding connecting strap sequentially from the inside to the outside after a preset time interval. The deceleration parachute is connected to rope buckles that are connected to each parachute line in a one-to-one manner. The middle part of the connecting strap corresponding to the innermost set of parachute lines is connected to the parachute through a fixing rope. When the time-delay separator corresponding to the innermost set of parachute lines cuts the corresponding connecting strap, the sum of the length of the fixing rope and the cut connecting strap is greater than that of the outer connecting strap.
2. The method for opening a variable drag surface parachute according to claim 1, characterized in that, It includes the following steps: Step 1: Connect the variable drag surface deceleration parachute to the parachute and airdrop it. Step 2: When the parachute opens, the connecting straps corresponding to the innermost set of parachute lines pull the middle canopy under force, causing the middle canopy to inflate fully. Step 3: The time-delay separator connected to the connecting strap of the innermost set of parachute lines cuts the corresponding connecting strap at a predetermined time, causing the middle canopy to be impacted by the airflow and move upward. The outer canopy of the middle canopy begins to inflate and tighten, which in turn pulls the connecting strap of the outermost set of parachute lines to tighten until the outer canopy of the middle canopy is fully inflated. Repeat Step 3 until all the connecting straps of each set of parachute lines are tightened, so that the deceleration parachute is fully inflated.