Light-gas gun flyer supercharging device and method

Abstract

The invention discloses a light-gas gun flyer supercharging device and method, and relates to the technical field of impact dynamics and shock wave physics, the light-gas gun flyer supercharging device comprises a light-gas gun, a detonation driver, a flyer and a target plate, the target plate is arranged at the right end of the detonation driver, the detonation driver is arranged at the right end of the light-gas gun, and the flyer is arranged at the right end of the light-gas gun. Flyers are arranged at the end of the light-gas gun and between the detonation driver and the target plate, the flyers comprise a first-stage flyer, a gradient flyer and a second-stage flyer, and the centers of the second-stage flyer, the gradient flyer and the first-stage flyer are located at the same horizontal height. According to the light-gas gun flyer supercharging device and method, on the basis of light-gas gun impact loading platforms such as a first-stage gas gun, a second-stage gas gun and an oxyhydrogen gun, the structure and the launching process of the light-gas gun do not need to be changed, the detonation driver and the gradient flyer are additionally arranged at the tail section of the launching tube, and the target hitting speed and the target hitting impact pressure can be greatly increased; and compared with a three-stage gun, the experiment cost can be obviously reduced.

Description

Technical Field

[0001] The present invention relates to the technical fields of impact dynamics and shock wave physics, and particularly relates to a light gas gun flyer booster device and method. Background Art

[0002] At present, the physical and chemical properties of substances under high temperature and high pressure are hot issues in frontier research, such as research on substance synthesis, decomposition, phase change, activation, superconductivity, etc. Currently, dynamic high-pressure devices such as light gas guns, chemical explosion loading devices, and magnetic drive loading devices can be used to carry out research on experimental samples by generating a high-pressure environment through high-speed collisions. The impact pressure achieved by a first-stage light gas gun is generally in the order of ten gigapascals, and the second-stage light gas gun and chemical explosion loading can achieve impact pressures of dozens or even hundreds of gigapascals. Traditional chemical explosion experimental devices need to use an explosive plane wave generator and high-energy explosives to drive the flyer. Due to the high danger of high-energy explosives and the large limitation of the application range, it is very difficult to promote. At the same time, due to the non-uniformity of high-energy explosives, it is very difficult to control the planarity of detonation products. Therefore, the flyer often deforms when driven, and the planarity of the one-dimensional plane shock wave generated when hitting the target is poor. The second-stage light gas gun can achieve an impact pressure of hundreds of gigapascals and uses high-pressure gas or hydrogen-oxygen detonation as the power source, which is currently the most widely used dynamic high-pressure impact loading device. Based on the second-stage light gas gun launch technology, an extension tube is added to the tail section of the launch tube to drive the second-stage flyer to further increase the collision speed and impact pressure, that is, the so-called third-stage light gas gun launch technology. However, the third-stage light gas gun launch technology is costly and has not been promoted so far. The cost of generating impact pressure by the magnetic drive loading device increases exponentially, and the mass and diameter of the driven flyer are also limited.

[0003] In view of this, for experimental personnel in the fields of impact dynamics and shock wave physics, how to use a light gas gun to achieve a faster impact loading speed and a higher impact loading pressure has become an important technical problem that urgently needs to be solved at present. Summary of the Invention

[0004] The purpose of the present invention is to provide a light gas gun flyer booster device and method to increase the existing impact pressure of the light gas gun.

[0005] To achieve the above purpose, the present invention provides a light gas gun flyer booster device, including a light gas gun, a detonation driver, a flyer, and a target plate. The target plate is arranged at the right end of the detonation driver, the detonation driver is arranged at the right end of the light gas gun, and flyers are arranged between the end of the light gas gun, the detonation driver, and the target plate. The flyer includes a first-stage flyer, a gradient flyer, and a second-stage flyer, and the centers of the second-stage flyer, the gradient flyer, and the first-stage flyer are at the same horizontal height.

[0006] Preferably, the first-stage flyer is adhesively bonded to the end of the sabot. The center of the front end face of the sabot coincides with the center of the first-stage flyer. The sabot is launched by the light gas gun, and the sabot is made of polycarbonate material.

[0007] Preferably, the detonation driver includes a metal chamber. A metal outer edge is provided at the end of the metal chamber. A metal groove is provided on the metal outer edge. The metal groove is connected to the cover plate, and the cover plate is made of plexiglass.

[0008] Preferably, the metal chamber is filled with a propellant, the propellant is nitromethane, the liquid level of the nitromethane is flush with the metal groove, and the purity of the nitromethane is not less than 99.5%.

[0009] Preferably, the gradient flyer is composed of materials with varying wave impedances. The inner layer material is a low-wave impedance material, the middle layer material is a medium-wave impedance material, and the outer layer material is a high-wave impedance material. The diameter of the gradient flyer is the same as the inner diameter of the detonation driver.

[0010] Preferably, the second-stage flyer is made of metal material, with its upper and lower surfaces finely polished and the flatness not less than 0.02 mm. The diameter of the second-stage flyer is slightly smaller than the diameter of the gradient flyer.

[0011] Preferably, the first-stage flyer is made of oxygen-free copper material, with a thickness of 2 mm, a diameter of 32 mm, and the flatness of its upper and lower surfaces being better than 0.02 mm.

[0012] A method for using a light gas gun flyer pressurization device includes the following steps: Step 1: Assemble the detonation driver. Inject the propellant into the metal chamber. Install the cover plate into the metal groove. Seal the connection between the side of the cover plate and the metal groove with epoxy resin. Cover a heavy object on the cover plate and wait for the epoxy resin to fully cure. Step 2: Use epoxy resin to adhesively bond the first-stage flyer to the front end face of the sabot. Step 3: The light gas gun drives the sabot and the first-stage flyer to perform a flat-plate impact on the detonation driver. Step 4: The detonation driver detonates to drive the gradient flyer, and the gradient flyer drives the second-stage flyer to collide with the target plate to generate an ultra-high impact pressure, achieving the effect of light gas gun flyer pressurization.

[0013] Preferably, in Step 3, the light gas gun drives the sabot and the first-stage flyer to perform a flat-plate impact on the detonation driver, and the impact pressure generated by the flat-plate impact is not less than the impact initiation pressure of the detonation driver.

[0014] Preferably, the inclination angle of the first-stage flyer hitting the detonation driver in Step 3 is less than 0.5°.

[0015] Therefore, the present invention adopts the above-mentioned light gas gun flyer booster device and method, which is based on light gas gun impact loading platforms such as a first-stage gas gun, a second-stage gas gun, and a hydrogen-oxygen gun. Without changing the structure of the light gas gun and the launching process, only a detonation driver and a gradient flyer need to be added to the tail section of the launching tube, which can significantly increase the speed of hitting the target and the impact pressure on the target. Compared with a three-stage gun, the experimental cost can be significantly reduced. Using nitromethane as the propellant, nitromethane is easier to obtain than high-energy explosives. At the same time, nitromethane is a liquid and does not require forming processes such as die casting or melting casting, so it has strong versatility and wide applicability. As a liquid, nitromethane is more homogeneous than high-energy explosives, and the one-dimensional shock wave generated by detonation has better quality, which can better drive the gradient flyer to impact the second-stage flyer and achieve quasi-isentropic loading of the second-stage flyer.

[0016] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the principle of the light gas gun flyer boosting method of the present invention; Figure 2 is a schematic diagram of the structure of the detonation driver of the present invention; Figure 3 is a schematic diagram of the structure of the gradient flyer of the present invention; REFERENCE SIGNS 101, light gas gun; 102, sabot; 103, first-stage flyer; 104, detonation driver; 105, gradient flyer; 106, second-stage flyer; 107, target plate; 401, metal chamber; 402, cover plate; 403, metal outer edge; 404, metal groove; 405, nitromethane; 501, porous organic glass; 502, organic glass; 503, aluminum; 504, aluminum-copper alloy; 505, copper. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Unless otherwise defined, the technical terms or scientific terms used in this invention shall have the ordinary meanings understood by those of ordinary skill in the field to which this invention pertains. The "first", "second" and similar terms used in this invention do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0020] Embodiment Please refer to Figures 1 - 3 , this invention provides a flyer plate pressurization device for a light gas gun, including a light gas gun 101, a detonation driver 104, a flyer plate and a target plate 107. The target plate 107 is arranged at the right end of the detonation driver 104, the detonation driver 104 is arranged at the right end of the light gas gun 101, and flyer plates are arranged between the end of the light gas gun 101, the detonation driver 104 and the target plate 107. The flyer plate includes a primary flyer plate 103, a gradient flyer plate 105 and a secondary flyer plate 106. The centers of the primary flyer plate 103, the gradient flyer plate 105 and the secondary flyer plate 106 are at the same horizontal height, ensuring that the entire flyer plate pressurization process of the light gas gun is carried out in an environment with a vacuum degree of 100 Pa.

[0021] The primary flyer plate 103 is adhesively bonded to the end of the sabot 102. The center of the front end face of the sabot 102 coincides with the center of the primary flyer plate 103. The sabot 102 is launched by the light gas gun 101. The sabot 102 is made of polycarbonate material, with a diameter of 34.95 mm. The primary flyer plate 103 is made of oxygen-free copper, with a thickness of 2 mm and a diameter of 32 mm. The flatness of the upper and lower surfaces is better than 0.02 mm. The primary flyer plate 103 is adhesively bonded to the front end face of the sabot 102 using epoxy resin, and it can be launched only after the epoxy resin has completely solidified.

[0022] The detonation driver includes a metal chamber 401. A metal outer edge 403 is arranged at the end of the metal chamber 401. A metal groove 404 is arranged on the metal outer edge 403. The metal groove 404 is connected to the cover plate 402. The cover plate 402 is made of organic glass, with a diameter of 38 mm and a thickness of 2 mm. The metal chamber 401 is processed from oxygen-free copper, with a wall thickness of 1.5 mm and an inner diameter of 32 mm. The metal chamber 401 has the same diameter as the primary flyer plate 103. The diameter of the metal outer edge 403 is 40 mm. The metal outer edge 403 is processed with a metal groove 404, and the diameter of the metal groove 404 is 38 mm and the depth is 0.5 mm.

[0023] The metal chamber 401 is filled with a propellant, which is nitromethane 405. The liquid level of the nitromethane 405 is flush with the metal groove 404, and the purity of the nitromethane 405 is not less than 99.5%. The metal chamber 401 is placed upright on the platform, and the propellant is injected into the metal chamber 401. The liquid level of the nitromethane 405 is flush with the metal groove 404. The cover plate 402 is inserted into the metal groove 404, and the connection between the side of the cover plate 402 and the metal groove 404 is encapsulated with epoxy resin. A heavy object is placed on the cover plate 402 and waited for the epoxy resin to fully cure.

[0024] The gradient flyer 105 is composed of materials with varying wave impedances. The inner layer material is a low-wave impedance material, the middle layer material is a medium-wave impedance material, and the outer layer material is a high-wave impedance material. The diameter of the gradient flyer 105 is the same as the inner diameter of the detonation driver 104. The gradient flyer 105 is composed of porous plexiglass 501, plexiglass 502, aluminum 503, aluminum-copper alloy 504, and copper 505. The porosity of the porous plexiglass 501 is 50%, the micropore diameter is less than 10 μm, the aluminum content in the aluminum-copper alloy 504 is 50%, and the aluminum 503, aluminum-copper alloy 504, and copper 505 are hot-pressed and sintered into one body, and then bonded with the porous plexiglass 501 and plexiglass 502 to form the gradient flyer 105. The diameter of the gradient flyer 105 is 32 mm, the thickness is 3 mm, and the thickness of each layer is 0.6 mm.

[0025] The secondary flyer 106 is made of oxygen-free copper, and its upper and lower surfaces are finely polished, with a flatness of not less than 0.02 mm. The diameter of the secondary flyer 106 is slightly smaller than the diameter of the gradient flyer 105.

[0026] A method for using a flyer pressurization device of a light gas gun includes the following steps: Step 1: Assemble the detonation driver 104, inject the propellant into the metal chamber 401, insert the cover plate 402 into the metal groove 404, encapsulate the connection between the side of the cover plate 402 and the metal groove 404 with epoxy resin, place a heavy object on the cover plate 402, and wait for the epoxy resin to fully cure; Step 2: Bond the primary flyer 103 to the front end face of the sabot 102 using epoxy resin; Step 3: The light gas gun 101 drives the sabot 102 and the primary flyer 103 to perform a flat-plate impact on the detonation driver 104. The impact pressure generated by the flat-plate impact is not less than the impact initiation pressure of the detonation driver 104, and the inclination angle of the primary flyer 103 hitting the detonation driver 104 is less than 0.5°; Step 4: The detonation driver 104 detonates to drive the gradient flyer 105, and the gradient flyer 105 drives the secondary flyer 106 to collide with the target plate 107 to generate an ultra-high impact pressure, achieving the effect of flyer pressurization of the light gas gun.

[0027] Therefore, the present invention adopts the above-mentioned light gas gun flyer booster device and method, which is based on light gas gun impact loading platforms such as a first-stage gas gun, a second-stage gas gun, and a hydrogen-oxygen gun. Without changing the structure and launching process of the light gas gun, only a detonation driver and a gradient flyer need to be added to the tail section of the launching tube, which can significantly increase the speed of hitting the target and the impact pressure on the target. Compared with the three-stage gun, the experimental cost can be significantly reduced. Using nitromethane as the propellant, nitromethane is easier to obtain than high-energy explosives. At the same time, nitromethane is a liquid and does not require processes such as die casting or casting for shaping. It has strong versatility and wide applicability. As a liquid, nitromethane is more homogeneous than high-energy explosives, and the one-dimensional shock wave generated by detonation has better quality, which can better drive the gradient flyer to impact the second flyer and achieve quasi-isentropic loading of the second flyer.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A flyer plate pressurization device for a light gas gun, characterized in that: It includes a light gas gun, a detonation driver, a flyer plate and a target plate. The target plate is arranged at the right end of the detonation driver, the detonation driver is arranged at the right end of the light gas gun, and flyer plates are arranged between the end of the light gas gun, the detonation driver and the target plate. The flyer plate includes a primary flyer plate, a gradient flyer plate and a secondary flyer plate, and the centers of the secondary flyer plate, the gradient flyer plate and the primary flyer plate are at the same horizontal height.

2. The light gas gun flyer booster device according to claim 1, characterized in that: The primary flyer plate is bonded to the end of the sabot. The center of the front end face of the sabot coincides with the center of the primary flyer plate. The sabot is launched by the light gas gun, and the sabot is made of polycarbonate material.

3. The light gas gun flyer booster device according to claim 1, characterized in that: The detonation driver includes a metal chamber. A metal outer edge is arranged at the end of the metal chamber. A metal groove is arranged on the metal outer edge, and the metal groove is connected to a cover plate. The cover plate is made of plexiglass.

4. A light gas gun flyer booster device according to claim 3, characterized in that: The metal chamber is filled with a propellant, the propellant is nitromethane, the liquid level of the nitromethane is flush with the metal groove, and the purity of the nitromethane is not less than 99.5%.

5. A light gas gun flyer booster device according to claim 4, characterized in that: The gradient flyer plate is composed of materials with varying wave impedances. The inner layer material is a low wave impedance material, the middle layer material is a medium wave impedance material, and the outer layer material is a high wave impedance material. The diameter of the gradient flyer plate is the same as the inner diameter of the detonation driver.

6. The light gas gun flyer booster device according to claim 5, wherein: The secondary flyer plate is made of a metal material, with its upper and lower surfaces finely polished and the flatness not less than 0.02 mm. The diameter of the secondary flyer plate is slightly smaller than the diameter of the gradient flyer plate.

7. The light gas gun flyer plate pressurization device according to claim 6, characterized in that: The primary flyer plate is made of oxygen-free copper, with a thickness of 2 mm and a diameter of 32 mm, and the flatness of its upper and lower surfaces is better than 0.02 mm.

8. A method for using a light gas gun flyer plate pressurization device according to any one of claims 1-7 above, characterized in that, It includes the following steps: Step 1: Assemble the detonation driver. Inject the propellant into the metal chamber, install the cover plate into the metal groove, encapsulate the connection between the side of the cover plate and the metal groove with epoxy resin, cover a heavy object on the cover plate, and wait for the epoxy resin to fully cure. Step 2: Use epoxy resin to bond the primary flyer plate to the front end face of the sabot. Step 3: The light gas gun drives the sabot and the primary flyer plate to perform a flat plate impact on the detonation driver. Step 4: The detonation driver detonates to drive the gradient flyer plate, and the gradient flyer plate drives the secondary flyer plate to collide with the target plate to generate an ultra-high impact pressure, achieving the effect of increasing the pressure of the flyer plate of the light gas gun.

9. The usage method of a flyer plate pressurization device for a light gas gun according to claim 8, characterized in that: In Step 3, the light gas gun drives the sabot and the primary flyer plate to perform a flat plate impact on the detonation driver, and the impact pressure generated by the flat plate impact is not less than the impact initiation pressure of the detonation driver.

10. The usage method of a flyer plate pressurization device for a light gas gun according to claim 9, characterized in that: In Step 3, the inclination angle of the primary flyer plate hitting the detonation driver is less than 0.5°.

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