A small-bore light-gas gun steady driving large-diameter flyer device

Abstract

A small-bore light gas gun stable driving large-diameter flyer device belongs to the technical field of gas gun flyer loading. The device comprises a light gas gun pipe, a gas release hole is arranged on the light gas gun pipe close to the tail end, the tail end of the light gas gun pipe is connected with one end of a transition section, the other end of the transition section is connected with a flyer launching pipe, the centers of the light gas gun pipe, the transition section and the flyer launching pipe are on the same axis, a pushing system is arranged in the light gas gun pipe, the pushing system extends into the flyer launching pipe from the inside of the light gas gun pipe through the transition section, the pushing system can move along the light gas gun pipe, the transition section and the flyer launching pipe, and a strong division system is connected with the end of the flyer launching pipe away from the transition section. The device can effectively solve the problem that the small-bore light gas gun cannot drive large-diameter flyers due to the limitation of caliber and gas volume, improve the flying attitude stability of the flyer, and expand the application range of the small-bore light gas gun.

Description

Technical Field

[0001] This invention belongs to the field of air cannon flying plate loading technology, specifically relating to a device for stable driving of large-diameter flying plates by a small-caliber light air cannon. Background Technology

[0002] As a primary experimental method for achieving single-wave loading in impact dynamics, the fly-plate loading experiment boasts significant advantages such as large loading area, high load amplitude, and narrow pulse width, holding an irreplaceable position in transient physics experiments. Lightweight gas guns, due to their mature technology, high economic efficiency, and adjustable loading speed, are widely used as fly-plate loading platforms.

[0003] However, current technology cannot stably drive large-diameter flying plates using a small-caliber light gas cannon. The loading speed and stability of the flying plate are limited by the gas volume in the gas chamber of the light gas cannon, the cannon's caliber, and gas turbulence during propulsion. The flying plate may exhibit eccentricity and tumbling within the launch tube, as well as unstable flight attitude and target eccentricity after exiting the barrel, leading to uneven loading waveforms and unsatisfactory loading results. Therefore, designing a device that stably drives large-diameter flying plates using a small-caliber light gas cannon would greatly improve the experimental efficiency of impact dynamics-related experiments and promote the rapid development of gas cannon flying plate loading technology. Summary of the Invention

[0004] This invention addresses the aforementioned problems and overcomes the shortcomings of existing technologies by providing a device for stably driving large-diameter flying plates using a small-caliber light air cannon. This invention effectively solves the problem that small-caliber light air cannons cannot drive large-diameter flying plates due to limitations in caliber and gas volume, improves the flight attitude stability of the flying plates, and expands the application range of small-caliber light air cannons.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] This invention provides a device for stabilizing and driving a large-diameter flying plate with a small-caliber light air cannon. The device comprises a light air cannon tube with a vent hole near its end. One end of the light air cannon tube is connected to a transition section, and the other end of the transition section is connected to a flying plate launching tube. The light air cannon tube, the transition section, and the flying plate launching tube are aligned on the same axis. A propulsion system is installed inside the light air cannon tube, extending from inside the light air cannon tube through the transition section into the flying plate launching tube. The propulsion system is movable along the light air cannon tube, the transition section, and the flying plate launching tube. A strong separation system is connected to the end of the flying plate launching tube away from the transition section, which can block the end of the propulsion system. A base is connected to the lower side of the light air cannon tube, the transition section, and the flying plate launching tube.

[0007] Furthermore, the propulsion system includes an airtight piston, a sealing ring, an elastic guide rod, a guide rod pad, and a fly-plate tray. The airtight piston and the guide rod pad are respectively connected to both ends of the elastic guide rod. The sealing ring is disposed on the airtight piston. The guide rod pad has a boss structure and is connected to the fly-plate tray. The fly-plate tray has a fly-plate groove at the center of its end face away from the guide rod pad. The airtight piston is located inside the light gas cannon tube. The elastic guide rod extends from inside the light gas cannon tube through the transition section to inside the fly-plate launching tube. The fly-plate tray is located inside the fly-plate launching tube.

[0008] Furthermore, the diameter of the airtight piston is equal to the inner diameter of the light gas cannon barrel, the diameter of the elastic guide rod is equal to the inner diameter of the transition section, the diameter of the guide rod pad is smaller than the diameter of the flying piece tray, and the diameter of the flying piece tray is equal to the inner diameter of the flying piece launching tube.

[0009] Furthermore, the total length of the flying plate tray, the airtight piston, and the elastic guide rod is less than the total length of the vent hole from the transition section, the transition section, and the flying plate launching tube.

[0010] Furthermore, the forced separation system includes a forced separation baffle, a rubber gasket, and fastening bolts. The forced separation baffle and the rubber gasket are both annular with the same inner and outer diameters. The outer diameter of the forced separation baffle and the rubber gasket is equal to the outer diameter of the flyer plate launcher tube. The inner diameter of the forced separation baffle and the rubber gasket is smaller than the diameter of the flyer plate tray but larger than the diameter of the flyer plate groove. Multiple fastening bolts are axially and evenly distributed on both the forced separation baffle and the rubber gasket. The fastening bolts are connected to threaded holes correspondingly provided on the end face of the flyer plate launcher tube, thus connecting the forced separation system to one end of the flyer plate launcher tube.

[0011] Furthermore, the inner diameter of the end of the transition section connected to the light gas gun tube is equal to the outer diameter of the light gas gun tube, and the light gas gun tube is inserted into the end of the transition section and threadedly connected to the transition section.

[0012] Furthermore, the outer diameter of the end of the transition section connected to the flying plate emitter tube is equal to the inner diameter of the flying plate emitter tube, and the transition section is inserted into the end of the flying plate emitter tube and threadedly connected to the flying plate emitter tube.

[0013] Furthermore, the base includes a lower seat, an upper cover, and a screw. The upper cover is connected to the lower seat via the screw. The light gas cannon tube, the transition section, and the flying blade launch tube are all provided with annular grooves, which are used to engage the corresponding lower seat and upper cover.

[0014] The beneficial effects of the present invention.

[0015] (1) This invention uses a small-caliber light air gun as a power source and accelerates the large-diameter flying plate through the guide rod structure, breaking the limitation of flying plate size and material by factors such as the caliber of the light air gun and the volume of air in the air chamber, and expanding the application range of the small-caliber light air gun.

[0016] (2) The present invention has a simple structure, is easy to operate, has strong repeatability, and is convenient to replace parts. At the same time, under the support and constraint of the flying plate launch tube and the flying plate tray, the launch stability and flight stability of the large-diameter flying plate are improved, and the interference caused by launch vibration and air resistance during the medium and low speed flight of the large-diameter flying plate is reduced, and the interference caused by redundant clutter generated by the attitude of the large-diameter flying plate in the experiment is reduced, thereby improving the accuracy of the experimental results. Attached Figure Description

[0017] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic side cross-sectional view of the present invention.

[0020] Figure 3 This is a schematic diagram of the propulsion system of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the strong distribution system of the present invention.

[0022] Figure 5 This is a schematic diagram of the base structure of the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of the lightweight gas cannon barrel of the present invention.

[0024] Figure 7 This is a schematic diagram of the structure of the airtight piston of the present invention.

[0025] Figure 8 This is a schematic diagram of the transition section of the present invention.

[0026] Figure 9 This is a schematic diagram of the structure of the flying plate emitter tube of the present invention.

[0027] Figure 10 This is a schematic diagram of the structure of the flyer tray of the present invention.

[0028] Figure 11 This is a schematic diagram of the guide rod pad of the present invention.

[0029] Figure 12 This is a schematic diagram of the experimental setup for this invention.

[0030] The markings in the diagram are as follows: 1 is the light gas cannon barrel, 2 is the vent hole, 3 is the transition section, 4 is the flying blade launch tube, 5 is the base, 6 is the airtight piston, 7 is the sealing ring, 8 is the elastic guide rod, 9 is the guide rod pad, 10 is the flying blade tray, 11 is the flying blade groove, 12 is the strong separation baffle, 13 is the rubber gasket, 14 is the fastening bolt, 15 is the lower seat, 16 is the upper cover, 17 is the screw, 18 is the annular groove, 19 is the high-speed camera, 20 is the large-diameter flying blade, 21 is the plane mirror, and 22 is the light gas cannon chamber. Detailed Implementation

[0031] As shown in the accompanying drawings, this embodiment provides a device for stabilizing and driving a large-diameter flying plate with a small-caliber light gas cannon, including a light gas cannon tube 1. The end of the light gas cannon tube 1 is connected to an external light gas cannon chamber 22, through which high-pressure gas is emitted.

[0032] The end of the light gas cannon tube 1 is connected to one end of the transition section 3. The inner diameter of the end of the transition section 3 connected to the light gas cannon tube 1 is equal to the outer diameter of the light gas cannon tube 1. The light gas cannon tube 1 is inserted into the end of the transition section 3 and threadedly connected to the transition section 3.

[0033] The other end of the transition section 3 is connected to the flying plate launch tube 4. The outer diameter of the end of the transition section 3 connected to the flying plate launch tube 4 is equal to the inner diameter of the flying plate launch tube 4. The transition section 3 is inserted into the end of the flying plate launch tube 4 and is threadedly connected to the flying plate launch tube 4.

[0034] The light gas cannon tube 1 is equipped with a propulsion system. The propulsion system extends from the light gas cannon tube 1 through the transition section 3 into the flying piece launching tube 4. Driven by the high-pressure gas emitted from the light gas cannon chamber 22, the propulsion system can move along the light gas cannon tube 1, the transition section 3, and the flying piece launching tube 4.

[0035] The actuation system includes an airtight piston 6, a sealing ring 7, an elastic guide rod 8, a guide rod pad 9, and a flyer plate tray 10. The airtight piston 6 and the guide rod pad 9 are respectively connected to both ends of the elastic guide rod 8. The guide rod pad 9 has a boss structure and is connected to the flyer plate tray 10 by screws. The diameter of the guide rod pad 9 is smaller than the diameter of the flyer plate tray 10.

[0036] The flyer tray 10 has a flyer groove 11 at the center of the end face away from the guide rod pad block 9. The flyer groove 11 is used to place the large-diameter flyer 20. When installing the large-diameter flyer 20, in order to prevent the large-diameter flyer 20 from falling off due to vibration during installation and launch, a small amount of petroleum jelly can be evenly applied inside the flyer groove 11.

[0037] The airtight piston 6 is located inside the light gas cannon tube 1, and the sealing ring 7 is set on the airtight piston 6 to enhance the sealing between the airtight piston 6 and the light gas cannon tube 1 and improve the utilization rate of the driving gas.

[0038] A vent hole 2 is provided near the end of the light gas gun barrel 1 to release the compressed high-pressure gas inside the light gas gun barrel 1 and reduce the force of the gas on the airtight piston 6.

[0039] The inner wall of the transition section 3 is smooth. The elastic guide rod 8 extends from the light gas cannon tube 1 through the transition section 3 to the flying piece launch tube 4. The flying piece tray 10 is located inside the flying piece launch tube 4.

[0040] The centers of the light air gun barrel 1, transition section 3, and flying plate launch tube 4 are on the same axis, which facilitates the installation of the airtight piston 6, elastic guide rod 8, and flying plate tray 10, and reduces the deformation and friction of the components.

[0041] The diameter of the airtight piston 6 is equal to the inner diameter of the light air cannon barrel 1, the diameter of the elastic guide rod 8 is equal to the inner diameter of the transition section 3, and the diameter of the flying piece tray 10 is equal to the inner diameter of the flying piece launch tube 4. This effectively constrains the degree of freedom of the flying piece tray 10 and ensures the stability of the attitude of the large-diameter flying piece 20 during acceleration.

[0042] The end of the flying plate launch tube 4 away from the transition section 3 is connected to a strong separation system, which can block the end of the driving system.

[0043] The forced separation system includes a forced separation baffle 12, a rubber gasket 13, and fastening bolts 14. Both the forced separation baffle 12 and the rubber gasket 13 are annular with the same inner and outer diameters. Multiple fastening bolts 14 are axially evenly distributed on both the forced separation baffle 12 and the rubber gasket 13. The fastening bolts 14 are connected to threaded holes corresponding to those on the end face of the flyer emitter tube 4, thus connecting the forced separation system to one end of the flyer emitter tube 4.

[0044] The outer diameter of the strong baffle 12 and the rubber pad 13 is equal to the outer diameter of the flying piece launch tube 4. The inner diameter of the strong baffle 12 and the rubber pad 13 is smaller than the diameter of the flying piece tray 10. The strong baffle 12 is used to stop the movement of the propulsion system. The rubber pad 13 acts as a buffer to reduce the impact force of the flying piece tray 10 on the strong baffle 12.

[0045] The inner diameter of the strong separation baffle 12 and the rubber pad 13 is larger than the diameter of the flying piece groove 11. After the propulsion system is stopped, it ensures that the large-diameter flying piece 20 in the flying piece groove 11 separates from the flying piece tray 10 and passes through the center of the strong separation baffle 12 and the rubber pad 13 for smooth flight.

[0046] In terms of length, the total length of the flyer plate tray 10, the gas-tight piston 6, and the elastic guide rod 8 is less than the total length of the distance from the vent hole 2 to the transition section 3, the transition section, and the flyer plate launch tube 4. This ensures that when the flyer plate tray 10 impacts the high-pressure system, the gas-tight piston 6 moves to a position that completely passes through the vent hole 2 without colliding with the transition section 3. This prevents the gas-tight piston 6 from colliding with the transition section 3 during launch, which could cause it to detach. Furthermore, after impacting the high-pressure system, the gas in the light gas cannon tube 1 can be discharged through the vent hole 2.

[0047] The light gas cannon barrel 1, transition section 3, and flying disc launch tube 4 are all connected to a base 5 on their lower sides. The base 5 includes a lower seat 15, an upper cover 16, and a screw 17. The upper cover 16 is connected to the lower seat 15 via the screw 17. The light gas cannon barrel 1, transition section 3, and flying disc launch tube 4 are all provided with annular grooves 18, which are used to engage the corresponding lower seat 15 and upper cover 16. The base 5 is connected to the test bench using bolts to secure the entire device and reduce vibration interference with the launch.

[0048] In terms of materials, the light air cannon barrel 1, transition section 3, base 5, flying blade launch tube 4, strong separation baffle 12, and guide rod pad 9 are all made of steel; the airtight piston 6 and flying blade tray 10 are both made of nylon; the elastic guide rod 8 can be made of lightweight composite material rod with high elastic modulus; and the rubber pad 13 is made of hard rubber.

[0049] The specific operating method is as follows:

[0050] During installation, first connect the light gas cannon tube 1 to the light gas cannon chamber 22 and fix it to the test bench via the base 5; nest the sealing ring 7 in the groove of the airtight piston 6 and connect it to the elastic guide rod 8, then place the airtight piston 6 inside the light gas cannon tube 1; the elastic guide rod 8 passes through the inner hole of the transition section 3 and selects one end of the internal thread of the transition section 3 to be threadedly connected to the light gas cannon tube 1, and the transition section 3 is supported on the test bench via the base 5; nest and tighten the elastic guide rod 8 and the guide rod pad 9, and then use screws to connect the guide rod pad 9 to the flyer plate tray 10; similarly, put the flyer plate tray 10 into the flyer launching tube 4, connect it to the transition section 3 via threads, and also fix it to the test bench via the base 5, and use devices such as a level and a positioner to make all parts of the device be on the same center line; use fastening bolts 14 to fix the strong separation baffle 12 and the rubber gasket 13 to the end of the flyer launching tube 4.

[0051] Apply a small amount of Vaseline evenly to the flyer groove 11, and install the large-diameter flyer 20 in the flyer groove 11. Push the flyer tray 10 to the front end of the flyer launch tube 4. Fill the gas chamber 22 of the light gas cannon with an appropriate amount of gas. After firing, the gas propels the entire propulsion system to move rapidly. The flyer tray 10 is intercepted by the strong separation system at the end of the flyer launch tube 4. Under the action of inertia, the large-diameter flyer 20 passes through the inner hole of the strong separation baffle 12 and the rubber pad 13 and continues to fly.

[0052] During the testing of this device, the experimental setup was as follows: Figure 12 As shown, a high-speed camera 19 is used to film the launch and flight process of the large-diameter flying piece 20. To accurately capture the flight attitude of the large-diameter flying piece 20, the high-speed camera 19 is positioned perpendicular to the flight trajectory axis of the large-diameter flying piece 20. A plane mirror 21 is installed at a 45° angle to the flight trajectory axis of the large-diameter flying piece 20 to observe its flight attitude from above. In the experiment, to more accurately adjust the positions of the high-speed camera 19 and the plane mirror 21, the fastening bolt 14 can be replaced with a long screw as a positioning rod.

[0053] It is understood that the above specific description of the present invention is only for illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of the present invention.

Claims

1. A device for stabilizing and driving a large-diameter flying plate in a small-caliber light air gun, characterized in that, The device includes a light gas cannon tube (1), which has a vent hole (2) near its end. The end of the light gas cannon tube (1) is connected to one end of a transition section (3), and the other end of the transition section (3) is connected to a flying piece launching tube (4). The light gas cannon tube (1), the transition section (3), and the flying piece launching tube (4) are on the same axis. The light gas cannon tube (1) is equipped with a propulsion system. The propulsion system extends from the inside of the light gas cannon tube (1) through the transition section (3) into the flying piece launching tube (4). The propulsion system can move along the light gas cannon tube (1), the transition section (3), and the flying piece launching tube (4). The end of the flying piece launching tube (4) away from the transition section (3) is connected to a strong separation system. The strong separation system can block the end of the propulsion system. The light gas cannon tube (1), the transition section (3), and the flying piece launching tube (4) are all connected to a base (5) on their lower sides. The propulsion system includes an airtight piston (6), a sealing ring (7), an elastic guide rod (8), a guide rod pad (9), and a fly-plate tray (10). The airtight piston (6) and the guide rod pad (9) are respectively connected to the two ends of the elastic guide rod (8). The sealing ring (7) is set on the airtight piston (6). The guide rod pad (9) has a boss structure and is connected to the fly-plate tray (10). The fly-plate tray (10) has a fly-plate groove (11) at the center of the end face away from the guide rod pad (9). The airtight piston (6) is located inside the light air cannon tube (1). The elastic guide rod (8) extends from inside the light air cannon tube (1) through the transition section (3) to inside the fly-plate launching tube (4). The fly-plate tray (10) is located inside the fly-plate launching tube (4). The diameter of the airtight piston (6) is equal to the inner diameter of the light gas cannon tube (1), the diameter of the elastic guide rod (8) is equal to the inner diameter of the transition section (3), the diameter of the guide rod pad (9) is smaller than the diameter of the flying piece tray (10), and the diameter of the flying piece tray (10) is equal to the inner diameter of the flying piece launching tube (4). The total length of the flying plate tray (10), the airtight piston (6) and the elastic guide rod (8) is less than the distance from the vent hole (2) to the transition section (3), the transition section and the flying plate launching tube (4).

2. The device for stabilizing and driving a large-diameter flying plate in a small-caliber light air gun according to claim 1, characterized in that, The strong separation system includes a strong separation baffle (12), a rubber gasket (13), and fastening bolts (14). The strong separation baffle (12) and the rubber gasket (13) are both annular and have the same inner and outer diameters. The outer diameter of the strong separation baffle (12) and the rubber gasket (13) is equal to the outer diameter of the flying piece launch tube (4). The inner diameter of the strong separation baffle (12) and the rubber gasket (13) is smaller than the diameter of the flying piece tray (10) and larger than the diameter of the flying piece groove (11). The strong separation baffle (12) and the rubber gasket (13) are axially evenly connected with multiple fastening bolts (14). The fastening bolts (14) are connected to the threaded holes correspondingly provided on the end face of the flying piece launch tube (4) to connect the strong separation system to one end of the flying piece launch tube (4).

3. The device for stabilizing and driving a large-diameter flying plate in a small-caliber light air gun according to claim 1, characterized in that, The inner diameter of the end of the transition section (3) connected to the light gas gun tube (1) is equal to the outer diameter of the light gas gun tube (1). The light gas gun tube (1) is inserted into the end of the transition section (3) and threadedly connected to the transition section (3).

4. The device for stabilizing and driving a large-diameter flying plate in a small-caliber light air gun according to claim 1, characterized in that, The outer diameter of the end of the transition section (3) connected to the flying chip emitter tube (4) is equal to the inner diameter of the flying chip emitter tube (4). The transition section (3) is inserted into the end of the flying chip emitter tube (4) and threadedly connected to the flying chip emitter tube (4).

5. The device for stabilizing and driving a large-diameter flying plate in a small-caliber light air gun according to claim 1, characterized in that, The base (5) includes a lower seat (15), an upper cover (16), and a screw (17). The upper cover (16) is connected to the lower seat (15) through the screw (17). The light gas cannon tube (1), the transition section (3), and the flying plate launching tube (4) are all provided with annular grooves (18), and are locked between the corresponding lower seat (15) and the upper cover (16) through the annular grooves (18).

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