A ram-air parachute with adjustable deployment time and a method of opening a parachute

Abstract

The application discloses a ram-air parachute with adjustable deployment time and a parachute opening method, and relates to the field of ram-air parachutes. The ram-air parachute with adjustable deployment time comprises a parachute body, a plurality of parachute ropes connected to the parachute body, and a slide cloth connected to the parachute ropes. The slide cloth comprises four annular rings sleeved on the four parachute ropes, two longitudinal deployment reinforcing belts, two transverse chord reinforcing belts, and a canopy with four edges connected to the four annular rings. The four edges of the canopy are connected to the two longitudinal deployment reinforcing belts and the two transverse chord reinforcing belts. The two ends of the deployment reinforcing belts and the chord reinforcing belts are connected to two adjacent annular rings. A plurality of interval arranged hooks are arranged on the deployment reinforcing belts and the chord reinforcing belts. One end of the deployment reinforcing belts and the chord reinforcing belts is connected to a retractable spring hook connected to a corresponding hook. The ram-air parachute with adjustable deployment time and the parachute opening method can adjust the length of the four edges of the canopy and the size of the slide cloth to adapt to the resistance requirement of different ram-air parachutes.

Description

Technical Field

[0001] This application relates to the field of ramjet parachutes, and more specifically, to a ramjet parachute with adjustable deployment time and a method for opening the parachute. Background Technology

[0002] Ram-air parachutes are formed by inflating with ram air to create an airfoil shape. Because they are made of materials with low permeability, they typically employ a two-stage deployment method similar to conventional parachutes, where the parachute is first decelerated before the ram-air parachute is inflated. Even so, the deployment impact of a ram-air parachute is still more than 50% higher than that of a conventional parachute. In this case, ram-air parachutes need to adopt further deployment control methods to reduce the deployment impact.

[0003] Currently, rammed-wing parachutes often use a sliding cloth closing method when opening the canopy. However, the mechanism of the sliding cloth closing method is complex. When obtaining the optimal ratio through experiments, it is often necessary to constantly change the sliding cloth with different parameters. In actual use, it is necessary to process various sliding cloths with different properties, and they need to be frequently replaced after each use, which is quite troublesome. Secondly, if it is found that the size of the sliding cloth is not suitable when using a rammed-wing parachute, the sliding cloth must be redesigned.

[0004] Therefore, there is a need for a stamped wing parachute and a method for opening the parachute that does not require frequent replacement and disassembly of the sliding cloth and has effective control performance. Summary of the Invention

[0005] The purpose of this application is to provide a ram-air parachute with adjustable deployment time and a method for opening the parachute, which can adjust the length of the four sides of the cover by adjusting the length of the spanwise reinforcing strip and the chordal reinforcing strip, thereby adjusting the size of the sliding fabric to adapt to the drag requirements of different ram-air parachutes.

[0006] This application is implemented as follows:

[0007] This application provides a stamped parachute with adjustable deployment time, comprising a parachute body, multiple parachute lines connected to the parachute body, and a sliding fabric connected to the parachute lines. The sliding fabric includes four rings respectively fitted onto the four parachute lines, two longitudinally arranged spanwise reinforcing strips, two transversely arranged chordal reinforcing strips, and a cover fabric with four corners connected to the four rings respectively. The four sides of the cover fabric are respectively connected to the two spanwise reinforcing strips and the two chordal reinforcing strips. The two ends of the spanwise and chordal reinforcing strips are respectively connected to two adjacent rings. The spanwise and chordal reinforcing strips are respectively provided with multiple spaced hooks. One end of the spanwise and chordal reinforcing strips is respectively connected to a retractable spring hook, which is configured to connect to a corresponding hook when retracted.

[0008] In some alternative implementations, two diagonal reinforcing strips are also included, each of which is connected to two loops located at the two ends of the diagonal of the fabric.

[0009] In some alternative implementations, the four sides of the fabric are respectively connected to bow-shaped air vents that cross the corresponding spanwise reinforcing strips and the corresponding chordwise reinforcing strips, and the two ends of the air vents are respectively connected to two adjacent rings.

[0010] In some alternative implementations, the fabric cover has multiple through holes.

[0011] This application also provides a method for opening the aforementioned adjustable-deployment-time ramjet parachute, which includes the following steps:

[0012] Before airdropping the parachute body, extend and retract the spring hooks connected to one end of the spanwise and chordwise reinforcing belts and connect them to a corresponding hook to adjust the length of the spanwise and chordwise reinforcing belts to the preset length. Then, put the four rings on the four parachute lines and airdrop the parachute body.

[0013] The beneficial effects of this application are as follows: The adjustable deployment time ram-air parachute provided by this application includes a parachute body, multiple parachute lines connected to the parachute body, and a sliding fabric connected to the parachute lines. The sliding fabric includes four rings respectively fitted onto the four parachute lines, two longitudinally arranged spanwise reinforcing strips, two transversely arranged chordal reinforcing strips, and a cover fabric connected to the four rings at its four corners. The four sides of the cover fabric are respectively connected to the two spanwise reinforcing strips and the two chordal reinforcing strips. The two ends of the spanwise and chordal reinforcing strips are respectively connected to two adjacent rings. Multiple spaced hooks are provided on the spanwise and chordal reinforcing strips. One end of each spanwise and chordal reinforcing strip is connected to a retractable spring hook, which is configured to connect to a corresponding hook when retracted or extended. The adjustable deployment time ram-air parachute and deployment method provided by this application can adjust the length of the four sides of the cover fabric by adjusting the length of the spanwise and chordal reinforcing strips, thereby adjusting the size of the sliding fabric to adapt to the drag requirements of different ram-air parachutes. Attached Figure Description

[0014] 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.

[0015] Figure 1 A schematic diagram of a ram air parachute with adjustable deployment time provided in an embodiment of this application;

[0016] Figure 2 A schematic diagram of the first usage state of the sliding cloth in the stamped parachute with adjustable deployment time provided in the embodiments of this application;

[0017] Figure 3 A schematic diagram of the second usage state of the sliding cloth in the stamped parachute with adjustable deployment time provided in the embodiments of this application;

[0018] Figure 4 A partial structural diagram showing the connection between the buckle and spring hook on the spanwise reinforcing belt of the ramjet with adjustable deployment time provided in this application embodiment.

[0019] In the diagram: 100, parachute body; 110, parachute lines; 200, sliding fabric; 210, ring; 220, spanwise reinforcing strip; 230, chordwise reinforcing strip; 240, covering fabric; 250, hook; 260, spring hook; 270, diagonal reinforcing strip; 280, vent; 290, through hole. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] The features and performance of the adjustable deployment time ram-wing parachute and the opening method of this application are further described in detail below with reference to embodiments.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this application embodiment provides a stamped parachute with adjustable deployment time, which includes a parachute body 100, fourteen parachute lines 110 connected to the parachute body 100, and a sliding fabric 200 connected to the parachute lines 110; wherein, the sliding fabric 200 includes four rings 210 respectively sleeved on the four parachute lines 110, two longitudinally arranged spanwise reinforcing strips 220, two transversely arranged chordally reinforcing strips 230, a cover fabric 240 connected to the four rings 210 at its four corners, and two diagonal reinforcing strips 270, the four sides of the cover fabric 240 being connected to the two parachute lines 110 respectively. The longitudinal reinforcing band 220 is connected to two chordal reinforcing bands 230. The two ends of the longitudinal reinforcing band 220 and the chordal reinforcing band 230 are respectively connected to two adjacent circular rings 210. Each diagonal reinforcing band 270 is connected to two circular rings 210 located at the two ends of the diagonal of the covering fabric 240. The four sides of the covering fabric 240 are respectively connected to bow-shaped air vents 280 that extend beyond the corresponding longitudinal reinforcing band 220 and the corresponding chordal reinforcing band 230. The two ends of the air vents 280 are respectively connected to two adjacent circular rings 210. The covering fabric 240 has eight spaced-apart through holes 290. The longitudinal reinforcing band 220 has eleven spaced-apart hooks 250, and the chordal reinforcing band 230 has seven spaced-apart hooks 250. One end of the longitudinal reinforcing band 220 and the chordal reinforcing band 230 is respectively connected to a retractable spring hook 260, which can connect to a corresponding hook 250 when extended or retracted.

[0029] This application embodiment also provides a method for opening the above-mentioned adjustable deployment time ram-wing parachute, which includes the following steps:

[0030] In the initial state before the parachute body 100 is dropped, the spring hooks 260 connected to one end of the spanwise reinforcing belt 220 and the chordwise reinforcing belt 230 are extended and connected to a corresponding hook 250 to shorten the length of the spanwise reinforcing belt 220 and the chordwise reinforcing belt 230 and adjust them to a preset length. Then, the four rings 210 are respectively fitted onto the four parachute lines 110. At this time, since the four sides of the cover 240 are connected to two spanwise reinforcing belts 220 and two chordwise reinforcing belts 230 respectively, the shortening of the length of the spanwise reinforcing belts 220 and the chordwise reinforcing belts 230 will reduce the projected area of ​​the cover 240, thereby reducing the resistance of the sliding cloth 200 during the descent. When dropping the parachute body 100, the resistance generated by the cover 240 can be reduced.

[0031] The adjustable deployment time stamped parachute and opening method provided in this application embodiment modify the existing conventional sliding fabric 200 by changing its fixed side length to an adjustable length. This is achieved by using spring hooks 260 connected to one end of the spanwise reinforcing belt 220 and the chordwise reinforcing belt 230, which extend and retract respectively, connecting to a hook 250 on the corresponding spanwise reinforcing belt 220 and the chordwise reinforcing belt 230 to adjust their lengths, thereby adjusting the four sides. The side length of the fabric 240, which is connected to the spanwise reinforcing strip 220 and the chordwise reinforcing strip 230, is adjusted to change the wind-blocking area of ​​the fabric 240 to adapt to the opening requirements of different ramjet parachutes. Each of the four sides of the fabric 240 is connected to an arc-shaped plenum 280 that extends beyond the corresponding spanwise reinforcing strip 220 and the corresponding chordwise reinforcing strip 230. The plenum 280 increases the upward drag of the sliding fabric 200 and changes accordingly with the size of the sliding fabric 200. The through-holes 290 on the fabric 240 appropriately reduce the impact force on the sliding fabric 200 and instantly increase the drag surface of the sliding fabric 200, thereby reducing the impact of the ramjet parachute's instantaneous deployment.

[0032] 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 stamped parachute with adjustable deployment time, comprising a parachute body, a plurality of parachute lines connected to the parachute body, and a sliding fabric connected to the parachute lines, characterized in that, The fabric includes four rings respectively fitted onto the four paracords, two longitudinally arranged longitudinal reinforcing strips, two transversely arranged chordal reinforcing strips, and a covering fabric connected to the four rings at its four corners. The four sides of the covering fabric are connected to the two longitudinal reinforcing strips and the two chordal reinforcing strips respectively. The two ends of the longitudinal and chordal reinforcing strips are connected to two adjacent rings respectively. The longitudinal and chordal reinforcing strips are provided with multiple spaced hooks. One end of the longitudinal and chordal reinforcing strips is connected to a retractable spring hook, which is configured to connect to a corresponding hook when retracted.

2. The ramjet parachute with adjustable deployment time according to claim 1, characterized in that, It also includes two diagonal reinforcing strips, each of which is connected to two rings located at the two ends of the diagonal of the covering fabric.

3. The ramjet parachute with adjustable deployment time according to claim 1, characterized in that, The four sides of the covering fabric are respectively connected to bow-shaped air vents that cross the corresponding longitudinal reinforcing belt and the corresponding chordal reinforcing belt, and the two ends of the air vents are respectively connected to two adjacent rings.

4. The ramjet parachute with adjustable deployment time according to claim 1, characterized in that, The fabric has multiple through holes.

5. The method for opening a ramjet parachute with adjustable deployment time according to claim 1, characterized in that, It includes the following steps: Before airdropping the parachute body, extend and retract the spring hooks connected to one end of the spanwise reinforcing belt and the chordwise reinforcing belt and connect them to a corresponding hook to adjust the length of the spanwise reinforcing belt and the chordwise reinforcing belt to a preset length. Then, put the four rings on the four parachute lines and airdrop the parachute body.

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