Adjustable aircraft recovery net system
By designing an adjustable aircraft recovery net system, using a flexible recovery net and angle adjustment frame, combined with an energy absorption device, the problems of high rigidity and insufficient buffering capacity in existing aircraft recovery systems have been solved. This has enabled the safe and flexible recovery of aircraft with various attitudes and structures, and improved fault tolerance and reusability.
Patent Information
- Application Number
- CN202511235688.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-01
- Publication Date
- 2025-11-11
AI Technical Summary
Existing aircraft recovery systems suffer from problems such as high system rigidity, insufficient buffering capacity, high requirements for flight trajectory accuracy, inability to adapt to changes in water entry and exit angles, inability to dynamically adjust the recovery angle, and poor durability of buffer structure materials, resulting in aircraft being easily damaged and having low reusability.
An adjustable aircraft recovery net system was designed, which uses a flexible recovery net and an angle adjustment frame, combined with guide rails and moving components to achieve net angle adjustment. It is equipped with energy absorption devices such as double-headed gas springs and tension springs to buffer impact forces and adapt to aircraft with different flight attitudes and structures.
It enables the safe, flexible, and non-destructive recovery of aircraft with various attitudes and structures in underwater and surface environments, improving fault tolerance and reusability, and reducing structural damage to the aircraft.
Smart Images
Figure CN120922360A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of structural design of aircraft launch and recovery equipment, and in particular to an adjustable aircraft recovery net system. Background Technology
[0002] The aircraft recovery net system is a key recovery structure deployed on both sides of the platform for intercepting, buffering, and locating aircraft after a flight mission. Its main function is to provide a flexible receiving interface at the end of the aircraft's path during its return from underwater or air, thereby reducing structural damage caused by impact and controlling its attitude to facilitate manual or mechanical retrieval.
[0003] Common recovery methods in existing technologies include rigid structures, hook capture, landing platforms, parachuting, and robotic arm grasping. These structures generally suffer from the following problems: (1) The system is highly rigid and its structure is not adjustable; (2) Insufficient buffering capacity, making the aircraft vulnerable to damage after impact; (3) It requires high accuracy in flight trajectory and has poor fault tolerance; (4) It cannot adapt to the characteristics of large changes in water outlet / inlet angle, high speed, and unstable attitude; (5) The inability to dynamically adjust the recovery angle leads to impact failure or damage; (6) The buffer structure is not perfect, and the kinetic energy is directly applied to a single part, resulting in the destruction of the aircraft; (7) The material of the buffer structure has poor durability and low reusability.
[0004] Therefore, existing technologies are still insufficient to meet the following requirements: to safely, flexibly, non-destructively, and highly adaptable recover aircraft of different models and with different entry and exit angles in underwater / above-water environments. Summary of the Invention
[0005] To address the aforementioned problems, this application provides an adjustable aircraft recovery net system.
[0006] The adjustable aircraft recovery net system provided in this application adopts the following technical solution: An adjustable aircraft recovery net system for recovering aircraft includes two sets of recovery frames respectively set on both sides of a platform and a recovery net set between the two sets of recovery frames. Each of the two recovery frames is provided with a guide rail, which is vertically arranged. Each of the two guide rails is provided with an angle adjustment frame for mounting one end of the recovery net. The angle adjustment frame slides along the guide rail and is provided with an energy absorption device for absorbing kinetic energy during the collision with the net.
[0007] Furthermore, the guide rail is provided with a moving component for driving the angle adjustment frame to move up and down along the guide rail. The moving component includes a wire rope and a handwheel. The handwheel is rotatably connected to the side wall of the guide rail. One end of the wire rope is fixedly connected to the handwheel, and the other end of the wire rope is fixedly connected to the angle adjustment frame.
[0008] Furthermore, the angle adjustment frame includes a vertical rod and a ring. The vertical rod is welded to the ring, and a sliding block is rotatably connected to the side wall of the vertical rod away from the ring. A groove is provided on the guide rail, and the sliding block slides in the groove. Several through holes are evenly provided on the ring, and a through hole corresponding to the through hole is provided on the sliding block. Several recessed holes are evenly provided on the guide rail along the height direction. The angle adjustment frame is locked in relative position with the guide rail by a pin. One end of the pin is inserted sequentially into the through hole, the through hole corresponding to the through hole, and the recessed hole.
[0009] Furthermore, the energy-absorbing device includes a double-headed gas spring, a connecting rod, two sets of rotating support rods, two sets of sliding rods, a sliding rod, and a slider. The connecting rod is horizontally fixed to the angle adjustment frame. Both rotating support rods have a protrusion in the middle. The middle of one rotating support rod is hinged to the connecting rod, and the end of one rotating support rod is hinged to the end of one output shaft of the double-headed gas spring. The protrusion of one rotating support rod is hinged to one end of one sliding rod. The sliding rod is vertically fixed to the middle of the connecting rod. The slider is slidably sleeved on the sliding rod, and the other end of the sliding rod is hinged to the slider. The middle of the other rotating support rod is hinged to the connecting rod, and the end of the other rotating support rod is hinged to the other output shaft of the double-headed gas spring. The protrusion of the other rotating support rod is hinged to one end of the other sliding rod, and the other end of the other sliding rod is hinged to the slider.
[0010] Furthermore, several mounting rings are evenly arranged at both ends of the recycling net, and several mounting rings on the same side are sleeved on the netting rod, and connecting rings are provided at both ends of the netting rod.
[0011] Furthermore, a tension spring is provided between the connecting ring and the end of the rotating support rod opposite to the double-ended gas spring. One end of the tension spring is connected to the connecting ring, and the other end of the tension spring is connected to the end of the rotating support rod opposite to the double-ended gas spring.
[0012] Furthermore, in the underwater recovery scenario, the recovery net is deployed in the water, and the aircraft impacts the recovery net after entering the water; In a water-based recovery scenario, if the aircraft is equipped with a hook structure, the recovery net is deployed on the water surface; if there is no hook, two recovery nets are arranged symmetrically at the center, one of which is placed on the water surface and the other is placed below the water surface.
[0013] Furthermore, the recycling net is configured as a flexible mesh structure.
[0014] In summary, this application includes at least one of the following beneficial technical effects: It is suitable for both underwater and surface environments and can meet the recovery needs of aircraft with various attitudes and structures; The angle adjustment frame allows for rapid adjustment of the angle between the recovery net and the water surface, adapting to different flight trajectories; The double-headed gas spring energy absorption mechanism can effectively buffer the impact force when the aircraft hits the net, preventing structural damage. The system is adaptable to aircraft with or without hooks and has high fault tolerance. It has good reusability, is easy to maintain, and the system can be automatically reset after recycling, which is convenient for continuous operation. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of an adjustable aircraft recovery net system according to an embodiment of this application.
[0016] Figure 2 This is a schematic diagram of the overall structure of the aircraft recovery net system used in an underwater recovery scenario in this application embodiment.
[0017] Figure 3 This is a schematic diagram illustrating the overall structure of the energy absorption device in the embodiments of this application.
[0018] Figure 4 This is an enlarged view of point A in the embodiment of this application.
[0019] Figure 5 This is a schematic diagram of the overall structure of the aircraft recovery net system used in the water recovery scenario in this application embodiment.
[0020] Explanation of reference numerals in the attached drawings: 1. Recycling frame; 2. Recycling net; 3. Platform; 4. Energy absorption device; 41. Double-headed gas spring; 42. Connecting rod; 43. Rotating support rod; 44. Sliding rod; 45. Sliding rod; 46. Sliding block; 5. Moving component; 51. Steel wire rope; 52. Handwheel; 6. Angle adjustment frame; 61. Ring; 62. Vertical rod; 63. Horizontal rod; 9. Water tank; 10. Guide rail; 12. Fixed pulley; 13. Recess; 14. Groove; 15. Protrusion; 16. Sliding block; 17. Slide groove; 18. Through hole; 19. Concave hole; 20. Protrusion; 21. Mounting ring; 22. Netting rod; 23. Connecting ring; 24. Tension spring. Detailed Implementation
[0021] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.
[0022] This application discloses an adjustable aircraft recovery net system.
[0023] Reference Figure 1 and Figure 2 An adjustable aircraft recovery net system is provided for aircraft recovery. It includes two sets of recovery frames 1 set on both sides of a platform 3 and a recovery net 2 set between the two sets of recovery frames 1. The recovery frames 1 are welded from square steel and steel plates, and the overall surface is coated with epoxy coal tar pitch paint, which has good corrosion resistance and load-bearing capacity. A water pool 9 is set in the middle of the platform 3. Guide rails 10 are set on both recovery frames 1. The guide rails 10 are set vertically and the bottom of the guide rails 10 extends into the water pool 9. An angle adjustment frame 6 is set on both guide rails 10 for installing one end of the recovery net 2. The angle adjustment frame 6 slides along the guide rail 10 to adjust the height of the recovery net 2. An energy absorption device 4 is set on the angle adjustment frame 6 for absorbing the kinetic energy during the impact of the recovery net 2.
[0024] Reference Figure 2 , Figure 3 and Figure 4 The guide rail 10 is provided with a moving component 5 for driving the angle adjustment frame 6 to move up and down along the guide rail 10. The moving component 5 includes a wire rope 51 and a handwheel 52. The handwheel 52 is rotatably connected to the side wall of the guide rail 10 away from the angle adjustment frame 6. A fixed pulley 12 is rotatably provided on the top of the guide rail 10. The axis of the fixed pulley 12 is perpendicular to the movement direction of the angle adjustment frame 6. A recess 13 is provided on the fixed pulley 12 for accommodating the wire rope 51. One end of the wire rope 51 is fixedly connected to the handwheel 52, and the other end of the wire rope 51 is fixedly connected to the angle adjustment frame 6.
[0025] The guide rail 10 has a groove 14, the extension direction of which is parallel to the extension direction of the guide rail 10. The groove 14 has a protrusion 15 at its opening. The angle adjustment frame 6 consists of a ring 61, a vertical rod 62, and a horizontal rod 63. The end of the wire rope 51 facing away from the handwheel 52 is fixedly connected to the vertical rod 62 of the angle adjustment frame 6. The vertical rod 62 and the horizontal rod 63 are integrally welded to form a "cross" shaped frame. The vertical rod 62 and the horizontal rod 63 are welded to the ring 61. The vertical rod 62 and the guide rail 10 are positioned opposite each other. Both the vertical rod 62 and the horizontal rod 63 pass through the center of the ring 61. The vertical rod 62 faces away from the side wall of the ring 61 of the angle adjustment frame 6. A sliding block 16 is rotatably connected to the vertical rod 62. The rotation axis of the sliding block 16 and the central axis of the ring 61 are collinear. The sliding block 16 slides in the groove 14. The side wall of the sliding block 16 is provided with a sliding groove 17 for the protrusion 15 to slide. The ring 61 is evenly provided with several through holes 18 along the circumference. The axis of the several through holes 18 is parallel to the axis of the ring 61. The sliding block 16 is provided with two through holes corresponding to the through holes 18. The two through holes are symmetrically arranged on both sides of the axis of the ring 61. The guide rail 10 is evenly provided with several concave holes 19 along the height direction. The vertical rod 62 and the ring 61 are locked with the guide rail 10 by a pin to lock their relative positions.
[0026] When adjusting the position of the angle adjustment frame 6, first turn the handwheel 52 to move the sliding block 16, so that the height of the angle adjustment frame 6 is moved to the appropriate position. Then turn the ring 61, which drives the recycling net 2 to rotate together. The ring 61 and the sliding block 16 rotate relative to each other. When the ring is rotated to the appropriate position, the through hole 18 on the ring 61 corresponds to the through hole on the sliding block 16, and the through hole on the sliding block 16 corresponds to the concave hole 19 in the groove 14. At this time, insert the pin. The pin is inserted into the through hole 18, the through hole and the concave hole 19 in sequence, thereby locking the height and angle of the angle adjustment frame 6.
[0027] Reference Figure 4The energy absorption device 4 includes a double-headed gas spring 41, a connecting rod 42, two sets of rotating support rods 43, two sets of sliding rods 44, a sliding rod 45, and a slider 46. The connecting rod 42 is horizontally fixed to the horizontal rod 63 of the angle adjustment frame 6 by bolts. Each of the two rotating support rods 43 has a protrusion 20 in the middle. The middle of one rotating support rod 43 is hinged to the connecting rod 42, and the end of one rotating support rod 43 is hinged to the end of one output shaft of the double-headed gas spring 41. The protrusion 20 of one rotating support rod 43... One end of the slide rod 44 is hinged to the other end of the slide rod 45. The slide rod 45 is vertically fixed to the middle of the connecting rod 42. The slider 46 is slidably sleeved on the slide rod 45. The other end of the slide rod 44 is hinged to the slider 46. The middle of the other rotating support rod 43 is hinged to the connecting rod 42. The end of the other rotating support rod 43 is hinged to the other output shaft end of the double-headed gas spring 41. The protrusion 20 of the other rotating support rod 43 is hinged to one end of the other slide rod 44. The other end of the other slide rod 44 is hinged to the slider 46.
[0028] When the rotating support rod 43 rotates, the slider 46 slides in a straight line along the sliding rod 45, and the damping effect of the double-headed gas spring 41 is used to realize the storage and release of buffer energy.
[0029] Reference Figure 2 The recycling net 2 is a flexible, glued, high-strength mesh structure with a size of 10 meters × 8 meters and a long mesh. Both ends of the recycling net 2 are evenly provided with several mounting rings 21. Several mounting rings 21 on the same side are all sleeved on the net rod 22. The net rod 22 is a flexible carbon fiber rod, and both ends of the net rod 22 are provided with connecting rings 23.
[0030] A tension spring 24 is provided between the connecting ring 23 and the end of the rotating support rod 43 that is away from the double-headed gas spring 41. One end of the tension spring 24 is connected to the connecting ring 23, and the other end of the tension spring 24 is connected to the end of the rotating support rod 43 that is away from the double-headed gas spring 41.
[0031] The overall recovery net 2 can extend forward upon impact with the aircraft, enhancing its capture capability and containment capacity. After recovery, the dual-headed gas spring 41 and tension spring 24 automatically and slowly reset the recovery net 2 for reuse.
[0032] When the aircraft impacts the recovery net 2, the tension spring 24 is stretched, generating resistance. Simultaneously, it pushes the gas spring to slowly stretch and absorb energy, while the rotating support rod 43 rotates inward, gradually dissipating the impact kinetic energy. This structure enables flexible deceleration of the aircraft after impact with the net, avoiding rigid collisions.
[0033] Reference Figure 2In the underwater recovery scenario, after the aircraft enters the water, it collides with the recovery net 2 set on the angle adjustment frame 6 in the water. It is slowly blocked and the energy is dissipated by the energy absorption device 4, so as to achieve lossless deceleration and catch of the aircraft. Then, the operator pulls the aircraft and the net to the water surface by turning the handwheel 52, and the recovery is completed.
[0034] Reference Figure 5 In the water-based recovery scenario, after the aircraft emerges from underwater, it impacts the recovery net 2 deployed above the water surface. If the aircraft has a hook structure, it can be automatically hooked and intercepted by the net. If there is no hook, two recovery nets 2 are symmetrically arranged in the center, one of which is placed on the water surface and the other is placed below the water surface. After being buffered and blocked by the recovery net 2, the aircraft falls into the flexible recovery net 2 underwater and is then pulled back to the water surface to complete the recovery.
[0035] The implementation principle of the adjustable aircraft recovery net system in this application embodiment is as follows: When the aircraft impacts the recovery net 2, the tension spring 24 is stretched to generate resistance, the rotating support rod 43 rotates outward, and the sliding rod 44 and the slider 46 rotate relative to each other. The sliding rod 45 limits the movement of the slider 46, while simultaneously pushing the double-headed gas spring 41 to slowly stretch and absorb energy. The rotating support rod 43 rotates inward, gradually dissipating the impact kinetic energy. This structure can achieve flexible deceleration after the aircraft impacts the recovery net 2, avoiding rigid collisions.
[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. An adjustable aircraft recovery net system for recovering aircraft, characterized in that: It includes two sets of recovery frames (1) respectively set on both sides of the platform (3) and a recovery net (2) set between the two sets of recovery frames (1). Each of the two recovery frames (1) is provided with a guide rail (10). The guide rail (10) is set vertically. Each of the two guide rails (10) is provided with an angle adjustment frame (6) for installing one end of the recovery net (2). The angle adjustment frame (6) slides along the guide rail (10). The angle adjustment frame (6) is provided with an energy absorption device (4) for absorbing kinetic energy during the collision with the net.
2. The adjustable aircraft recovery net system according to claim 1, characterized in that: The guide rail (10) is provided with a moving component (5) for driving the angle adjustment frame (6) to move up and down along the guide rail (10). The moving component (5) includes a wire rope (51) and a handwheel (52). The handwheel (52) is rotatably connected to the side wall of the guide rail (10). One end of the wire rope (51) is fixedly connected to the handwheel (52), and the other end of the wire rope (51) is fixedly connected to the angle adjustment frame (6).
3. The adjustable aircraft recovery net system according to claim 1, characterized in that: The angle adjustment frame (6) includes a vertical rod (62) and a ring (61). The vertical rod (62) is welded to the ring (61). A sliding block (16) is rotatably connected to the side wall of the vertical rod (62) away from the ring (61). A groove (14) is provided on the guide rail (10). The sliding block (16) slides in the groove (14). A plurality of through holes (18) are evenly opened on the ring (61). A through hole corresponding to the through hole (18) is opened on the sliding block (16). A plurality of recessed holes (19) are evenly opened on the guide rail (10) along the height direction. The angle adjustment frame (6) is locked to the relative position between itself and the guide rail (10) by a pin. One end of the pin is inserted into the through hole (18), the through hole corresponding to the through hole (18), and the recessed hole (19) in sequence.
4. The adjustable aircraft recovery net system according to claim 1, characterized in that: The energy absorption device (4) includes a double-headed gas spring (41), a connecting rod (42), two sets of rotating support rods (43), two sets of sliding rods (44), a sliding rod (45), and a slider (46). The connecting rod (42) is horizontally fixed to the angle adjustment frame (6). Both rotating support rods (43) have a protrusion (20) in the middle. The middle of one of the rotating support rods (43) is hinged to the connecting rod (42), and the end of one of the rotating support rods (43) is hinged to the end of one of the output shafts of the double-headed gas spring (41). The protrusion (20) of one of the rotating support rods (43) and the sliding rod (46) are hinged to the end of one of the sliding rods (45). One end of the rod (44) is hinged, the sliding rod (45) is vertically fixed in the middle of the connecting rod (42), the slider (46) is slidably sleeved on the sliding rod (45), the other end of the sliding rod (44) is hinged to the slider (46), the middle of another rotating support rod (43) is hinged to the connecting rod (42), the end of another rotating support rod (43) is hinged to the other output shaft end of the double-headed gas spring (41), the protrusion (20) of another rotating support rod (43) is hinged to one end of another sliding rod (44), and the other end of another sliding rod (44) is hinged to the slider (46).
5. An adjustable aircraft recovery net system according to claim 1, characterized in that: The recycling net (2) has several mounting rings (21) evenly arranged at both ends. The mounting rings (21) on the same side are all sleeved on the netting rod (22). The netting rod (22) has connecting rings (23) at both ends.
6. The adjustable aircraft recovery net system according to claim 4, characterized in that: A tension spring (24) is provided between the connecting ring (23) and the end of the rotating support rod (43) away from the double-headed gas spring (41). One end of the tension spring (24) is connected to the connecting ring (23), and the other end of the tension spring (24) is connected to the end of the rotating support rod (43) away from the double-headed gas spring (41).
7. An adjustable aircraft recovery net system according to claim 1, characterized in that: In the underwater recovery scenario, the recovery net (2) is deployed in the water, and the aircraft crashes into the recovery net (2) after entering the water; In a water-based recovery scenario, if the aircraft is equipped with a hook structure, the recovery net (2) is laid on the water surface; if there is no hook, two recovery nets (2) are arranged symmetrically at the center, one of which is placed on the water surface and the other is placed below the water surface.
8. An adjustable aircraft recovery net system according to claim 1, characterized in that: The recycling net (2) is configured as a flexible mesh structure.