Parawing backup system suitable for two persons

Abstract

The invention discloses a parafoil backup system suitable for two persons. The spring guide parachute sequentially comprises a spring guide parachute (1), a parachute canopy sleeve (7), a backup parachute (2) and a sling (5) from top to bottom, and is characterized in that a parachute canopy of the backup parachute (2) adopts a rectangular airfoil structure with 9 holes and 18 air chambers; the spring guide umbrella (1) is connected with the backup umbrella (2) and a central circular ring of the closing-up cloth (6) through brocade silk sleeve belts, and the canopy sleeve (7) is arranged between the spring guide umbrella (1) and the backup umbrella (2) and is penetrated by the brocade silk sleeve belts. The problems that an existing parafoil backup parachute system is small in bearing capacity and poor in gliding performance can be solved, the task requirement of double-person parachute landing is met, and the carrying capacity of parachute landing is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of applications on the airborne system. Specifically, it is a parafoil reserve parachute system suitable for two persons. Background Art

[0002] Existing domestic parafoil reserve parachutes are all single-person reserve parachutes, with a maximum total carrying mass of 145 kg. Under the condition of a total parachuting mass of 145 kg, the glide ratio is 2.5, which can only ensure being used as a backup for the main parachute during single-person parachuting with equipment, to ensure the safety of the parachuting personnel.

[0003] When heavy loads, large equipment or a two-person parachuting mission requires opening the reserve parachute due to unexpected situations, due to the limitation of the total carrying mass of the existing parafoil reserve parachute, it may cause the reserve parachute to be unable to effectively bear the weight when opened, affecting the normal deployment and safety of the parachute; at the same time, the relatively low glide ratio of the existing parafoil reserve parachute also limits the control ability of the parachutist, making it difficult to select an ideal landing point in an emergency. Especially when it is necessary to avoid obstacles or select a safe landing area, it may lead to an inability to avoid dangerous ground. Summary of the Invention

[0004] The purpose of the present invention is to provide a parafoil reserve parachute system suitable for two persons, which is used to solve the problems of small load-bearing and weak gliding performance of the existing parafoil reserve parachute system, meet the requirements of the two-person parachuting mission, and improve the equipment-carrying ability of parachuting.

[0005] The technical solution to achieve the purpose of the present invention is: A parafoil reserve parachute system suitable for two persons, which successively includes a spring pilot parachute, a parachute canopy cover, a reserve parachute and a harness from top to bottom. The parachute canopy of the reserve parachute adopts a rectangular wing surface structure with 9 holes and 18 air chambers; the spring pilot parachute is connected to the reserve parachute and the central ring of the closing cloth by a nylon sleeve belt. The parachute canopy cover is between the spring pilot parachute and the reserve parachute and is penetrated by the nylon sleeve belt.

[0006] Further, the spring pilot parachute includes a main parachute top part, a top panel, a surrounding panel, a conical spring framework, a reinforcing belt and a protective cover; the main parachute top part is located at the top of the spring pilot parachute and is sewn together with the upper end of the top panel; the lower end of the top panel is sewn together with the upper end of the surrounding panel to form two frustums with different diameters; the reinforcing belt is sewn on the top panel and the surrounding panel in a radial manner; the conical spring framework is placed in the frustum formed by the main parachute top part, the top panel and the surrounding panel, and the upper end is fixed on the main parachute top part; the protective cover is located at the bottom end of the surrounding panel and is in an inverted conical shape, used to fix the lower end of the conical spring framework.

[0007] Furthermore, the parachute cover adopts a wedge-shaped box structure for encapsulating the parachute; the parachute cover includes a parachute cover main body, a hook band, a flannel band, a parachute cover reinforcement band, and a short fixing band; there is an opening at the upper end of the parachute cover box body, and the hook band and the flannel band are sewn on it for being stuffed in after the backup parachute is packed; the parachute cover reinforcement band is sewn on the parachute cover main body and is arranged in an "X" shape, and a metal ring hole is sewn at the center of the "X". The brocade silk sleeve bands connecting the spring guide parachute and the backup parachute pass through the metal ring hole to fix the parachute cover between the spring guide parachute and the backup parachute; the short fixing band is sewn on the outer side of the edge of the parachute cover for fixing the redundant parachute ropes.

[0008] Furthermore, the suspension straps are divided into two left and right ones, and each suspension strap is divided into front and rear groups of suspension straps. Removable rope buckles are installed at the tops of the front and rear groups of suspension straps for connecting the parachute ropes, and the roots of the suspension straps are sewn together with the main sleeve band on the harness system; a control loop is provided in the middle of the suspension strap.

[0009] Furthermore, the backup parachute includes a parachute, parachute ropes, and a closing cloth; the parachute has upper and lower wing surfaces. Three rib pieces are installed between one upper wing surface and one lower wing surface of the parachute to form one hole and two air chambers; the backup parachute adopts a nine-hole structure, and nineteen rib pieces with the shape of wing profiles are connected between the two wing surfaces to form eighteen air chambers. The projection of the parachute is rectangular; there is an opening at the front of each air chamber, and except for the side rib pieces, the other rib pieces are all provided with two holes so that each air chamber can maintain a uniform air pressure.

[0010] Furthermore, the rib pieces are divided into three types. One is a reinforced rib piece with a parachute rope connected below, another is a non-reinforced rib piece that only connects the upper and lower wing surfaces to keep the wing shape after the parachute is inflated, and the third is a special load-bearing rib piece - side rib piece on each side edge of the parachute. Such rib pieces have no ventilation holes; the reinforced rib pieces and the non-reinforced rib pieces are cross-distributed. One hole is composed of two non-reinforced rib pieces and one reinforced rib piece, and the reinforced rib piece is located between the non-reinforced rib pieces.

[0011] Furthermore, stabilizing surfaces are provided on both sides of the parachute. The stabilizing surfaces are triangular and are connected to the side rib pieces by slits without spacing.

[0012] Furthermore, the parachute ropes are bifurcated in a tree shape and are divided into five groups, which are respectively fixed on the reinforced rib pieces.

[0013] Furthermore, the closing cloth is of a rectangular structure, and four metal ring holes are installed at its four corners. All the parachute ropes are divided into four groups and respectively pass through the four ring holes. The closing cloth is connected to the spring guide parachute through a connecting rope.

[0014] Compared with the prior art, the present invention has the following remarkable advantages: The present invention solves the problems that the existing wing parachute backup parachute system has a small load capacity and glide ratio, can only meet the needs of single-person parachuting, and does not have the ability of double-person parachuting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the backup parachute system of the present invention.

[0016] Figure 2 This is the spring-guided parachute of the present invention.

[0017] Figure 3 This is the structural diagram of the parachute canopy cover of the present invention.

[0018] Figure 4 This is the structural diagram of the parachute canopy of the present invention.

[0019] Figure 5 This is the structural diagram of the reinforcing rib fins of the present invention

[0020] Figure 6 This is the structural diagram of the non-reinforcing rib fins of the present invention

[0021] Figure 7 This is the structural diagram of the side rib fins of the present invention

[0022] Figure 8 This is the structural diagram of the stabilizer surface of the present invention

[0023] Figure 9 This is the schematic diagram of the suspension lines of the present invention.

[0024] Figure 10 This is the structural diagram of the closing cloth of the present invention. Detailed implementation manners

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] The technical solution adopted by the present invention is: a parafoil backup parachute system used together with the main parachute system, mainly including a spring-guided parachute 1, a parachute canopy cover 7, a harness 5 and a backup parachute 2. The structural schematic diagram is shown in Figure 1 .

[0027] Detailed elaboration of the technical solution of the present invention.

[0028] 1 Guided parachute

[0029] The guided parachute of the backup parachute 2 adopts a spring-skeleton guided parachute with an area of 0.54 m 2 , and a nylon silk sleeve belt is used to connect the guided parachute and the closing cloth 6 of the backup parachute 2. The conical spring-skeleton design is mainly to ensure that it has sufficient elasticity to pop out the guided parachute and get rid of the eddy area of the human body. The structure of the spring-guided parachute 1 is shown in Figure 2 .

[0030] The spring-guided parachute 1 includes a main top part 8 of the parachute, a top panel 9, a circumferential panel 10, a conical spring framework 11, a reinforcing strap 12, and a protective sleeve 13. The main top part 8 of the parachute is located at the top of the spring-guided parachute and is sewn together with the upper end of the top panel 9. The lower end of the top panel 9 is sewn together to form two frustums of a cone with different diameters. The reinforcing strap 12 is sewn radially on the top panel 9 and the circumferential panel 10. The conical spring framework 11 is placed inside the frustum formed by the main top part 8 of the parachute, the top panel 9, and the circumferential panel 10, and the upper end is sewn and fixed on the main top part 8 of the parachute. The protective sleeve 13 is located at the bottom end of the circumferential panel 10 and is in an inverted conical shape, used to fix the lower end of the conical spring framework 11.

[0031] The parachute cover 7

[0032] The parachute cover 7 is mainly used to encapsulate the parachute canopy, restrain the suspension lines 4, and ensure the parachute-opening procedure. The system is integrated with a main parachute and a backup parachute. The main parachute is below and the backup parachute 2 is above, so a wedge-shaped structure is adopted.

[0033] The parachute cover 7 is composed of parts such as a parachute cover main body 14, a hook strap 15, a velvet strap 16, a parachute cover reinforcing strap 17, and a short fixing strap 18. There is a 225-mm opening at the upper end of the box body of the parachute cover 7, and the hook strap 15 and the velvet strap 16 are sewn, which is convenient for the backup parachute 2 to be stuffed in after packaging. The parachute cover reinforcing strap 17 is sewn on the parachute cover main body 14 and is arranged in an "X" shape. A metal ring hole is sewn at the center of the "X", and the brocade silk sleeve belt connecting the spring-guided parachute 1 and the backup parachute 2 passes through the metal ring hole to fix the parachute cover 7 between the spring-guided parachute 1 and the backup parachute 2. See Figure 3 。

[0034] 3 The suspension straps 5

[0035] The suspension straps 5 of the backup parachute 2 are divided into left and right ones. Each suspension strap 5 is further divided into front and rear groups of suspension straps 5. Removable rope buckles are installed at the tops of the front and rear groups of suspension straps 5 for connecting the suspension lines 4. The roots of the suspension straps 5 are sewn together with the main sleeve belt on the harness system to ensure the reliable connection between the parachute system and the parachute-pack harness system. A control loop is provided in the middle of the suspension strap 5 for the parachutist to operate. The control rope 13 connects the control loop and the tail of the parachute canopy.

[0036] 4 The backup parachute canopy

[0037] The canopy of the backup parachute 2 is mainly composed of components such as a parachute canopy, suspension lines 4, and a closing cloth 6. It adopts a 9-hole structure, with an area of 30 m 2 rectangle, an extension length of 8.37 m, a chord length of 3.584 m, and an aspect ratio of 2.34. The projected area of the parachute canopy in this scheme is a rectangle. See Figure 4 。

[0038] The parachute canopy has upper and lower wing surfaces, which are connected by 19 ribs with the shape of wing profiles, forming 18 air chambers. Each air chamber is open at the front, and air is filled in through this opening, so that after the parachute canopy is opened, it becomes a wing with a certain rigidity. Except for the side ribs 21, the other ribs are all provided with two holes, so that each air chamber can maintain a uniform air pressure.

[0039] The ribs are divided into three types. One is the reinforced rib 19 connected with the suspension lines 4 below. Its function is not only to ensure that the parachute canopy has a certain wing shape after inflation, but also to transfer the aerodynamic forces acting on the upper and lower wing surfaces to the control tapes through the suspension lines 4. Another type only connects the upper and lower wing surfaces to keep the wing shape after the parachute canopy is inflated, and this type of rib is called the non-reinforced rib 20. In addition, there is a special load-bearing rib on each side edge of the parachute canopy - the side rib 21. This type of rib has no ventilation holes to prevent the gas inside the wing surface from leaking and maintain the rigidity of the wing surface. The reinforced ribs and non-reinforced ribs are distributed crosswise. One hole is composed of 2 non-reinforced ribs 20 and 1 reinforced rib 19, and the reinforced rib 19 is located between the non-reinforced ribs 20. See Figures 5 to 7 。

[0040] The airfoil of the rib adopts the Lissamn7808 airfoil, and the inlet cut angle is 40.7°.

[0041] Stabilizing surfaces 22 are provided on both sides of the parachute canopy. The stabilizing surfaces 22 are triangular and are connected to the side ribs 21 by a seamless slit connection, aiming to both maintain the gliding performance and not affect the stability during landing. See Figure 8 。

[0042] The suspension lines 4 are bifurcated in a tree-like shape and are divided into five groups, which are respectively fixed on the reinforced ribs 19 of the parachute canopy. The structural dimensions of the suspension lines 4 are shown in Figure 8 。The lengths of the suspension lines 4 are: L1 = 2130mm, L2 = 2225mm, L3 = 2305mm, L4 = 2606mm, L12 = 3025mm, L345 = 3250mm. See Figure 9 。

[0043] The closing cloth 6 is mainly used to control the dynamic load when the main parachute is opened. It is a rectangular structure, and four metal ring holes are installed at its four corners. All the suspension lines 4 are divided into four groups and respectively pass through the four ring holes. The closing cloth 6 is connected to the stabilizing pilot chute through a connecting rope, and relies on the resistance of the pilot chute, the resistance of the closing cloth 6 itself, and the friction between the ring holes and the suspension lines 4 to delay the expansion speed of the suspension lines 4. See Figure 10 。

[0044] The present invention has been verified by tests and put into use. The product performance is good and can meet the requirements of various indicators.

[0045] The maximum glide ratio of existing parachutes is 2.5. The parafoil backup parachute of the present invention has increased the glide ratio to 3, improving its maneuverability and still having a certain ability to perform tasks and avoid obstacles after the main parachute fails. This device is mainly used in the parachute system and belongs to the work of filling in the gaps, re-integrating the existing parachute system and improving the performance of the parachute.

Claims

1. A wing parachute reserve parachute system applicable to two persons, which successively comprises a spring pilot chute (1), a parachute cover (7), a reserve parachute (2) and a harness (5) from top to bottom, and is characterized in that: The canopy of the reserve parachute (2) adopts a rectangular wing surface structure with 9 holes and 18 air chambers; the spring pilot chute (1) is connected to the reserve parachute (2) and the central ring of the closing cloth (6) by a brocade silk sleeve belt. The canopy cover (7) is located between the spring pilot chute (1) and the reserve parachute (2) and is penetrated by the brocade silk sleeve belt.

2. The wing parachute reserve parachute system applicable to two persons according to claim 1, characterized in that: The spring pilot chute (1) includes a main top part (8), a top panel (9), a circumferential panel (10), a conical spring framework (11), a strengthening belt (12) and a protective cover (13); the main top part (8) is located at the top of the spring pilot chute (1) and is sewn together with the upper end of the top panel (9); the lower end of the top panel (9) is sewn together with the upper end of the circumferential panel (10) to form two frustums with different diameters; the strengthening belt (12) is sewn radially on the top panel (9) and the circumferential panel (10); the conical spring framework (11) is placed in the frustum formed by the main top part (8), the top panel (9) and the circumferential panel (10), and the upper end is fixed on the main top part (8); the protective cover (13) is located at the bottom end of the circumferential panel (10) and is in an inverted conical shape for fixing the lower end of the conical spring framework (11).

3. The wing parachute reserve parachute system applicable to two persons according to claim 1, characterized in that: The canopy cover (7) adopts a wedge-shaped box structure for encapsulating the canopy; the canopy cover (7) includes a canopy cover main body (14), a hook belt (15), a velvet belt (16), a canopy cover strengthening belt (17), and a short fixing belt (18); there is an opening at the upper end of the box body of the canopy cover (7), and the hook belt (15) and the velvet belt (16) are sewn for stuffing after the reserve parachute (2) is packaged; the canopy cover strengthening belt (17) is sewn on the canopy cover main body (14) and is arranged in an "X" shape. A metal ring hole is sewn at the center of the "X", and the brocade silk sleeve belt connecting the spring pilot chute (1) and the reserve parachute (2) passes through the metal ring hole to fix the canopy cover (7) between the spring pilot chute (1) and the reserve parachute (2); the short fixing belt (18) is sewn on the outer side of the edge of the canopy cover (7) for fixing the redundant suspension lines.

4. The wing parachute reserve parachute system applicable to two persons according to claim 1, wherein: The suspension straps (5) are divided into two left and right ones. Each suspension strap (5) is divided into front and rear groups of suspension straps. Removable rope buckles are installed at the tops of the front and rear groups of suspension straps for connecting the suspension lines (4). The roots of the suspension straps (5) are sewn together with the main sleeve belt on the harness system; a control loop is provided in the middle of the suspension straps (5).

5. The wing parachute reserve parachute system applicable to two persons according to claim 1, characterized in that: The reserve parachute (2) includes a canopy, suspension lines (4) and a closing cloth (6); the canopy has upper and lower wing surfaces. Three ribs are installed between one upper wing surface and one lower wing surface of the canopy to form 1 hole and 2 air chambers; the reserve parachute (2) adopts a 9-hole structure. Nineteen ribs with the shape of an airfoil are connected between the two wing surfaces to form 18 air chambers. The projection of the canopy is rectangular; there is an opening at the front of each air chamber. Except for the side ribs, the other ribs are all provided with two holes so that each air chamber can maintain a uniform air pressure.

6. The wing parachute reserve parachute system applicable to two persons according to claim 5, wherein: The fins are divided into three types. One is the reinforced fin (19) with a suspension line (4) connected below. Another is the non-reinforced fin (20) that only connects the upper and lower wing surfaces to keep the wing shape after the parachute is inflated. The third is a special load-bearing fin - side fin (21) on each side edge of the parachute. Such fins have no ventilation holes. The reinforced fins and non-reinforced fins are distributed crosswise. One cell is composed of 2 non-reinforced fins (20) and 1 reinforced fin (19), and the reinforced fin (19) is located between the non-reinforced fins (20).

7. The wing parachute reserve parachute system applicable to two persons according to claim 5, wherein: Stabilizing surfaces (22) are provided on both sides of the parachute. The stabilizing surfaces (22) are triangular and are connected to the side fins (21) by a seamless slit connection.

8. The wing parachute reserve parachute system applicable to two persons according to claim 5, characterized in that: The suspension lines (4) are bifurcated like a tree and are divided into five groups, which are respectively fixed on the reinforced fins (19).

9. The wing parachute reserve parachute system applicable to two persons according to claim 5, characterized in that: The closing cloth (6) has a rectangular structure, and four metal ring holes are installed at its four corners. All the suspension lines (4) are divided into four groups and respectively pass through the four ring holes. The closing cloth (6) is connected to the spring pilot parachute (1) by a connecting rope.

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