Transverse high-speed impact testing device for high-performance fiber endless tows

Abstract

The invention provides a transverse high-speed impact testing device for a high-performance fiber endless tow, and relates to the field of impact testing, and the transverse high-speed impact testing device comprises a clamping assembly which is used for clamping the endless tow; the high-speed impact assembly is used for impacting the endless tows; the transmitting assembly is used for driving the high-speed impact assembly through high-pressure gas; wherein the emitting assembly comprises an emitting tube and a pressurizing device, an emitting cavity is formed in the emitting tube, the pressurizing device is provided with a pressurizing cavity, one end of the emitting cavity can be communicated with the pressurizing cavity, an emitting opening is formed in the other end of the emitting cavity, and the extending direction of the emitting tube is perpendicular to the arrangement direction of endless tows; the emitting assembly further comprises a control valve, the control valve is located between the emitting cavity and the pressurizing cavity, and the control valve is used for enabling the emitting cavity to communicate with the pressurizing cavity when the air pressure in the pressurizing cavity reaches a target pressure value so that the high-pressure air can drive the high-speed impact assembly in the emitting cavity to emit the endless tows. According to the transverse high-speed impact testing device, the impact testing precision can be improved.

Description

Technical Field

[0001] The invention relates to the field of impact testing, in particular to a transverse high-speed impact testing device for high-performance fiber filament bundles. Background Art

[0002] The bulletproof performance of composite armor mainly depends on the mechanical properties of high-performance fibers. The higher the fiber strength, the better the bulletproof effect of the armor. Therefore, a large number of scholars and industry personnel have devoted their lives to developing new high-performance fibers or improving the mechanical properties of existing high-performance fibers. However, in the early stages of research and development, the output of high-performance fibers prepared in the laboratory is limited. If they need to be woven into fabrics and then composited into armor plates, not only will a lot of time, money and manpower costs be required, but the final number of samples is small, and the data obtained is also limited, which cannot accurately evaluate whether the fiber performance can meet the expected standards under the high-speed impact of projectiles.

[0003] A device capable of performing an impact test on yarn is needed. The related testing device stretches the yarn through a Hopkinson pull rod, and the testing accuracy of the yarn by this testing device is low. Summary of the invention

[0004] The invention provides a transverse high-speed impact testing device for a high-performance fiber filament bundle, which is used to solve the technical problem of how to improve the impact testing accuracy.

[0005] An embodiment of the present invention provides a transverse high-speed impact testing device for a high-performance fiber filament bundle, the transverse high-speed impact testing device for a high-performance fiber filament bundle comprises: a clamping assembly for clamping the high-performance fiber filament bundle; a high-speed impact assembly for impacting the high-performance fiber filament bundle; a launching assembly for driving the high-speed impact assembly to impact the high-performance fiber filament bundle through high-pressure gas; wherein the launching assembly comprises a launching tube and a pressurizing device, the launching tube has a launching cavity, the pressurizing device has a pressurizing cavity, one end of the launching cavity can be connected to the pressurizing cavity, the other end of the launching cavity forms a launching port, and the extending direction of the launching tube is perpendicular to the arrangement direction of the high-performance fiber filament bundle; the launching assembly also comprises a control valve, the control valve is located between the launching cavity and the pressurizing cavity, the control valve is used to connect the launching cavity with the pressurizing cavity when the gas pressure in the pressurizing cavity reaches a target pressure value, so that the high-pressure gas drives the high-speed impact assembly in the launching cavity to shoot at the high-performance fiber filament bundle.

[0006] In some embodiments, the pressurized chamber has an air inlet and an exhaust port, the air inlet is connected to an air source and has a pressurizing valve, the exhaust port has a launch valve, and the control valve is a differential pressure valve; When the pressurizing valve is open and the exhaust valve is closed, the gas of the gas source enters the pressurizing chamber through the air inlet and causes the pressure differential valve to be located in the first position; when the pressurizing valve is closed and the exhaust valve is open, the gas in the pressurizing chamber is discharged through the exhaust port and causes the pressure differential valve to be located in the second position, wherein, when the pressure differential valve is located in the first position, the pressurizing chamber is isolated from the launching chamber, and when the pressure differential valve is located in the second position, the pressurizing chamber is connected to the launching chamber.

[0007] In some embodiments, the high-speed impact assembly includes: a buttstock having a receiving groove, the buttstock being capable of blocking the firing chamber; and a projectile body partially received in the receiving groove and detachably connected to the buttstock.

[0008] In some embodiments, the sabot has a tail fin.

[0009] In some embodiments, the projectile body includes: a housing portion, which is accommodated in the housing groove; and an impact portion, which extends from the outer surface of the housing portion away from the side of the support, wherein in a first direction, the size of the impact portion is the same as that of the housing portion, and in a second direction, the size of the impact portion is smaller than that of the housing portion, wherein the first direction and the second direction are perpendicular to each other and are both perpendicular to the extension direction of the impact portion.

[0010] In some embodiments, the end of the impact portion away from the accommodation portion forms an arc-shaped curved surface; and / or the outer surface of the impact portion has an uneven structure.

[0011] In some embodiments, the clamping assembly includes: a clamping frame; a wire roller, two of the wire rollers are connected to the clamping frame, and the axes of the two wire rollers are arranged at intervals; wherein the wire roller has a wire groove, and the wire groove is used to wind the high-performance fiber filament bundle.

[0012] In some embodiments, the wire roller is rotatably connected to the clamping frame, and a rotation axis of the wire roller coincides with an axis of the wire roller.

[0013] In some embodiments, the clamping assembly further includes: a sliding platform fixedly connected to the clamping frame; and a sliding frame slidably connected to the sliding platform; wherein a sliding direction of the sliding platform relative to the sliding frame is parallel to an axial direction of the wire roller.

[0014] In some embodiments, the lateral high-speed impact testing device further includes: a speed measuring device, wherein two speed measuring devices are arranged at intervals along the extension direction of the launch tube, and the two speed measuring devices are respectively located on both sides of the clamping assembly.

[0015] An embodiment of the present invention provides a transverse high-speed impact testing device for a high-performance fiber filament bundle, the transverse high-speed impact testing device comprising: a clamping assembly for clamping the high-performance fiber filament bundle, a high-speed impact assembly for impacting the high-performance fiber filament bundle, and a launching assembly for driving the high-speed impact assembly to impact the high-performance fiber filament bundle through high-pressure gas, wherein the launching assembly comprises a launching tube and a pressurizing device, the launching tube has a launching cavity, the pressurizing device has a pressurizing cavity, one end of the launching cavity is connected to the pressurizing cavity, and the other end of the launching cavity forms a launching port, the high-speed impact assembly is located in the launching cavity, and can move along the launching cavity and be ejected from the launching port under the action of the high-pressure gas in the pressurizing cavity, thereby colliding with the high-performance fiber filament bundle, that is, the flight direction of the high-speed impact assembly is guided by the extension direction of the launching tube. , so that the high-speed impact component can laterally impact the high-performance fiber filament bundle, and then can more accurately simulate the impact direction of the real bullet impacting the high-performance fiber filament bundle, thereby improving the accuracy of the impact test; at the same time, the launch component also includes a control valve, which is located between the launch chamber and the pressurization chamber, and is used to connect the launch chamber with the pressurization chamber when the air pressure in the pressurization chamber reaches the target pressure value. Specifically, during the gradual pressurization of the pressurization chamber, the launch chamber and the pressurization chamber are isolated by the control valve, and the launch chamber and the pressurization chamber are connected after the air pressure in the pressurization chamber reaches the target pressure, so that the high-speed impact component is ejected under the drive of the high-pressure gas of the target pressure, that is, the pressure of the high-pressure gas that drives the high-speed impact component to eject is controlled by the control valve, thereby controlling the ejection speed of the high-speed impact component, further improving the accuracy of the impact test. This device greatly reduces the R&D cost of high-performance bulletproof fibers, shortens the R&D cycle, and accelerates the development of my country's fiber protective armor field. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a high-speed transverse impact test device for high-performance fiber filament bundles provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a launch assembly in a high-performance fiber filament bundle transverse high-speed impact testing device provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of another launching assembly in a device for testing the transverse high-speed impact of a high-performance fiber filament bundle provided by an embodiment of the present invention; Figure 4 An exploded view of a high-speed impact component in a transverse high-speed impact testing device for high-performance fiber filament bundles provided by an embodiment of the present invention; Figure 5 A schematic structural diagram of a clamping assembly in a device for testing the transverse high-speed impact of a high-performance fiber filament bundle provided by an embodiment of the present invention; Figure 6A schematic structural diagram of another high-speed transverse impact testing device for high-performance fiber filament bundles provided in an embodiment of the present invention.

[0017] Description of Reference Numerals 1. Lateral high-speed impact test device; 10. Clamping assembly; 11. Clamping frame; 12. Wire roller; 121. Wire groove; 13. Sliding platform; 14. Sliding frame; 20. High-speed impact assembly; 21. Bullet support; 211. Receiving groove; 212. Tail fin; 22. Projectile body; 221. Receiving part; 222. Impact part; 223. Arc-shaped surface; 30. Launching assembly; 31. Launching tube; 311. Launching chamber; 312. Launching port; 32. Pressurizing device; 321. Pressurizing chamber; 322. Air inlet; 323. Exhaust port; 324. Pressurizing valve; 325. Launching valve; 33. Control valve; 331. Valve body; 332. Air chamber; 333. Ventilation pipe; 334. First vent; 335. Second vent; 40. Speed ​​measuring device; 50. Projectile recovery structure. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] The various specific technical features in the various embodiments described in the specific implementation methods can be combined in various ways without contradiction. For example, different implementation methods can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in the present invention will not be described separately.

[0020] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0021] In addition, it should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the following description, the terms "first\second\..." involved are merely used to distinguish different objects, and do not indicate that the objects have the same or related points. It should be understood that the directions described by the directions nouns such as "above", "below", "inside" and "outside" involved are all directions in normal use.

[0022] In the following specific embodiments, the transverse high-speed impact test device for high-performance fiber filament bundles can be used to test the ballistic performance of any high-performance fiber, and the high-performance fiber can be poly(p-phenylene terephthalamide) (Kevlar), wholly aromatic polyester, polybenzobisoxazole or carbon fiber; the transverse high-speed impact test device is used to perform transverse high-speed impact on the high-performance fiber filament bundle, that is, the impact test is used to apply an impact force perpendicular to the extension direction of the high-performance fiber filament bundle to the high-performance fiber filament bundle, and the impact force is relatively large. The structure and function of the transverse high-speed impact test device for high-performance fiber filament bundles are exemplarily described below in combination with various embodiments.

[0023] In some embodiments, Figure 1 As shown, the lateral high-speed impact test device 1 for the high-performance fiber filament bundle 2 includes: a clamping assembly 10, a high-speed impact assembly 20 and a launching assembly 30. The clamping assembly 10 is used to clamp the high-performance fiber filament bundle 2. Specifically, the clamping assembly 10 is used to fix the high-performance fiber filament bundle 2 and straighten the high-performance fiber filament bundle 2 so as to apply a lateral impact force to the high-performance fiber filament bundle 2; the high-speed impact assembly 20 is used to impact the high-performance fiber filament bundle, so as to simulate the impact of a bullet on the high-performance fiber filament bundle; the launching assembly 30 is used to drive the high-speed impact assembly 20 to impact the high-performance fiber filament bundle 2 through high-pressure gas. The launching assembly 30 can control the launching direction of the high-speed impact assembly 20, so that the high-speed impact assembly 20 can apply a lateral impact force to the high-performance fiber filament bundle 2. Compared with applying a pulling force to the high-performance fiber filament bundle through a stretching device, the high-speed impact assembly 20 applies a lateral impact force to the high-performance fiber filament bundle. The added lateral impact force is more consistent with the actual stress condition of the high-performance fiber filament bundle 2 when it is impacted by a bullet, thereby making the impact test more accurate. Specifically, the Hopeson rod stretches the filament along the axial direction, and the filament is only stretched by the Hopeson rod; in reality, the projectile impacts the filament along the radial direction, that is, the projectile impacts the filament laterally, and the filament is subjected to the coupling effect of shear stress and tensile stress at the impact point. Its stress state is more complicated than axial stretching. Moreover, the launching component 30 can also control the launching speed of the high-speed impact component 20 by controlling the air pressure of the high-pressure gas, thereby adjusting the magnitude of the lateral impact force applied by the high-speed impact component 20 to the high-performance fiber filament bundle 2, thereby further improving the accuracy of the impact test. The following is combined with Figure 2 The structure of the launching assembly 30 and the principle of controlling the launching direction of the high-speed impact assembly 20 and the air pressure are described. Figure 2As shown, the launching assembly 30 includes a launching tube 31 and a pressurizing device 32, wherein the launching tube 31 has a launching chamber 311, and the pressurizing device 32 has a pressurizing chamber 321, one end of the launching chamber 311 is connected to the pressurizing chamber 321, and the other end of the launching chamber 311 forms a launching port 312, the extending direction of the launching tube 31 is perpendicular to the extending direction of the high-performance fiber filament bundle 2, the high-speed impact assembly 20 is located in the launching chamber 311, and can move along the launching chamber 311 and be ejected from the launching port 312 under the action of the high-pressure gas in the pressurizing chamber 321, so as to collide with the high-performance fiber filament bundle 2, that is, the flight direction of the high-speed impact assembly 20 is guided by the extending direction of the launching tube 31, so that the high-speed impact assembly 20 can laterally collide with the high-performance fiber filament bundle 2; at the same time, the launching assembly 30 also includes a control valve 33 The control valve 33 is located between the launching chamber 311 and the pressurizing chamber 321. The control valve 33 is used to connect the launching chamber 311 with the pressurizing chamber 321 when the air pressure in the pressurizing chamber 321 reaches the target pressure value, so that the high-pressure gas drives the high-speed impact component 20 in the launching chamber 311 to shoot toward the high-performance fiber filament bundle 2. Specifically, in the process of gradually pressurizing the pressurizing chamber 321, the launching chamber 311 and the pressurizing chamber 321 are isolated by the control valve 33. After the air pressure in the pressurizing chamber 321 reaches the target pressure, the launching chamber 311 is connected with the pressurizing chamber 321, so that the high-speed impact component 20 is ejected under the drive of the high-pressure gas of the target pressure, that is, the pressure of the high-pressure gas driving the high-speed impact component 20 to eject is controlled by the control valve 33, thereby controlling the ejection speed of the high-speed impact component 20, and further improving the accuracy of the impact test. It should be noted that, unlike fabric or composite targets, the strength of filament bundles is relatively low and the energy absorption effect on the kinetic energy of the projectile is limited. If the target impact speed of the high-speed impact component 20 in each experiment is too discrete, it is not conducive to the evaluation of the dynamic mechanical properties of the fiber. By performing high-precision control on the launch speed of the high-speed impact component 20 and controlling the ejection speed of the high-speed impact component 20, the distribution range of the target impact speed of the high-speed impact component 20 can be narrowed, thereby making the test results more accurate.

[0024] Moreover, the gas can be pressurized to a higher gas pressure level by pressurizing the pressure chamber 321, so that the high-speed impact component 20 can be driven to impact the high-performance fiber filament bundle at high speed. Moreover, by setting the launch tube 31, the high-pressure gas can apply gas pressure to the high-speed impact component 20 in the launch tube 31 for a sufficiently long time, that is, the high-speed impact component 20 has a sufficiently long acceleration time, which further increases the speed at which the high-speed impact component 20 impacts the high-performance fiber filament bundle, so that the strain of the high-performance fiber filament bundle is more in line with the actual situation. Specifically, the strain rate that the Hopkinson pull rod can achieve is generally 10 2 ~10 3 s -1(linear strain per unit time), which is far less than the strain rate (10 4 ~10 6 s -1 ), the high-speed impact assembly 20 provided in this embodiment can perform a lateral high-speed impact on the high-performance fiber filament bundle under the drive of high-pressure gas, so that the strain rate of the high-performance fiber filament bundle reaches 10 4 ~10 6 s -1 .

[0025] An embodiment of the present invention provides a transverse high-speed impact testing device for a high-performance fiber filament bundle, the transverse high-speed impact testing device comprising: a clamping assembly for clamping the high-performance fiber filament bundle, a high-speed impact assembly for impacting the high-performance fiber filament bundle, and a launching assembly for driving the high-speed impact assembly to impact the high-performance fiber filament bundle through high-pressure gas, wherein the launching assembly comprises a launching tube and a pressurizing device, the launching tube has a launching cavity, the pressurizing device has a pressurizing cavity, one end of the launching cavity is connected to the pressurizing cavity, and the other end of the launching cavity forms a launching port, the high-speed impact assembly is located in the launching cavity, and can move along the launching cavity and be ejected from the launching port under the action of the high-pressure gas in the pressurizing cavity, thereby colliding with the high-performance fiber filament bundle, that is, the flight direction of the high-speed impact assembly is guided by the extension direction of the launching tube. , so that the high-speed impact component can laterally impact the high-performance fiber filament bundle, and then can more accurately simulate the impact direction of a real bullet impacting the high-performance fiber filament bundle, thereby improving the accuracy of the impact test; at the same time, the launching component also includes a control valve, which is located between the launching chamber and the pressurizing chamber, and is used to connect the launching chamber with the pressurizing chamber when the air pressure in the pressurizing chamber reaches the target pressure value. Specifically, in the process of gradually pressurizing the pressurizing chamber, the launching chamber and the pressurizing chamber are isolated by the control valve, and the launching chamber is connected with the pressurizing chamber after the air pressure in the pressurizing chamber reaches the target pressure, so that the high-speed impact component is ejected under the drive of the high-pressure gas of the target pressure, that is, the pressure of the high-pressure gas driving the high-speed impact component to eject is controlled by the control valve, thereby controlling the ejection speed of the high-speed impact component, and further improving the accuracy of the impact test.

[0026] In some embodiments, Figure 2 As shown, after the control valve 33 is opened, the high-pressure gas in the pressurization chamber 321 enters the launching chamber 311 and drives the high-speed impact assembly 20 in the launching chamber 311 to be ejected, and after the high-speed impact assembly 20 is ejected, the high-pressure gas in the launching chamber 311 is discharged from the launching chamber 311 through the launching port 312.

[0027] In some embodiments, Figure 3As shown, the pressurized chamber 321 has an air inlet 322 and an exhaust port 323, the air inlet 322 is connected to the gas source and has a pressurizing valve 324, the exhaust port 323 has a firing valve 325, the control valve 33 is a pressure differential valve, when the pressurizing valve 324 is opened and the firing valve 325 is closed, the gas in the gas source enters the pressurized chamber 321 from the air inlet 322 so that the gas pressure in the pressurized chamber 321 gradually increases, and at the same time, the high-pressure gas in the pressurized chamber 321 presses the pressure differential valve (control valve 33) to the first position, when the pressure differential valve (control valve 33) is in the first position, the pressurized chamber 321 is isolated from the firing chamber 311, so that the gas in the pressurized chamber 321 will not leak into the firing chamber 311 and the pressurized chamber 321 will be compressed. The air pressure of the chamber 321 can be reliably and gradually increased; when the pressurizing valve 324 is closed and the launching valve 325 is opened, the gas in the pressurizing chamber 321 flows out from the launching valve 325 at a high speed. At this time, the air pressure applied by the fluid in the pressurizing chamber 321 to the pressure differential valve (control valve 33) is less than the air pressure applied by the gas in the launching chamber 311 to the pressure differential valve (control valve 33), so that the pressure differential valve (control valve 33) is pushed to the second position (the pressure differential valve at the second position is indicated by a double dotted line). When the pressure differential valve (control valve 33) is in the second position, the launching chamber 311 is connected with the pressurizing chamber 321, so that the high-pressure gas in the pressurizing chamber 321 can enter the launching chamber 311 and drive the high-speed impact assembly 20 in the launching chamber 311 to be ejected.

[0028] Optionally, in order to make the pressure differential valve (control valve 33) move between the first position and the second position more reliably under the action of the pressure difference, the pressure differential valve may also be provided with a pressure chamber so that the air pressure in the pressurizing chamber 321 can directly act on the pressure differential valve. Figure 3 The specific structure of the pressure differential valve is exemplified as follows: Figure 3As shown, the differential pressure valve (control valve 33) includes: a valve body 331, an air chamber 332 and a vent pipe 333. The air chamber 332 is located in the pressurized chamber 321 and is connected to the air inlet 322 and the exhaust port 323 through the vent pipe 333. The air chamber 332 has a first vent 334 and a second vent 335. The air chamber 332 is connected to the vent pipe 333 through the first vent 334, and the air chamber 332 is connected to the pressurized chamber 321 through the second vent 335. The valve body 331 is located in the air chamber 332. When the pressurizing valve 324 is open and the launching valve 325 is closed, the gas from the gas source enters the air chamber 332 through the vent pipe 333 and the first vent port 334 and then enters the pressurizing chamber 321 through the second vent port 335. At the same time, the gas entering the air chamber 332 presses the valve body 331 to the first position, thereby isolating the pressurizing chamber 321 from the launching chamber 311. When the pressurizing valve 324 is closed and the launching valve 325 is open, the gas in the air chamber 332 quickly flows from the first vent port 334 and the vent pipe 333 to the exhaust port 323. At this time, the air pressure in the air chamber 332 is lower than the air pressure in the launching chamber 311. The valve body 331 moves to the second position under the action of the pressure difference so that the pressurizing chamber 321 and the launching chamber 311 are connected. At this time, a part of the gas in the pressurizing chamber 321 directly enters the launching chamber 311 to drive the high-speed impact assembly 20 to launch, and the other part enters the air chamber 332 from the second air vent 335 and then flows out from the exhaust port 323. It should be noted that the size of the first air vent 334 is larger than that of the second air vent 335, so that the outlet speed of the air chamber 332 is greater than the inlet speed, so that the air pressure in the air chamber 332 is continuously lower than the air pressure in the launching chamber 311, thereby allowing the valve body 331 to be reliably maintained in the second position.

[0029] In some embodiments, Figure 4 As shown, the high-speed impact assembly 20 includes a buttress 21 and a projectile 22. The buttress 21 has a receiving groove 211, and the projectile 22 is partially received in the receiving groove 211, and the buttress 21 and the projectile 22 are detachably connected, wherein the buttress 21 can block the firing chamber 311, and it can be understood that the buttress 21 and the firing chamber 311 form an interference fit, and when the high-pressure gas acts on Figure 2 During the process of the high-speed impact assembly 20 in the firing chamber 311, the high-pressure gas can fully act on the cartridge case 21 and will not leak from the gap between the cartridge case 21 and the inner wall of the firing chamber 311, thereby improving the driving efficiency of the high-pressure gas driving the high-speed impact assembly 20; at the same time, since the projectile 22 and the cartridge case 21 form a separable structure through the accommodating groove 211, the size of the cartridge case 21 can be adjusted according to the size of the firing chamber 311, so that the high-speed impact assembly 20 can be suitable for launch tubes 31 of different sizes, and adjusting the size of the cartridge case 21 can also change the degree of interference fit formed between the cartridge case 21 and the firing chamber 311, thereby fine-tuning the launch gas pressure of the high-speed impact assembly 20. Optionally, as Figure 4As shown, the buttstock 21 has a tail wing 212 , and the tail wing 212 can make the flight trajectory of the high-speed impact assembly 20 more stable through airflow disturbance during the flight of the high-speed impact assembly 20 .

[0030] In some embodiments, Figure 4 As shown, the body 22 includes a receiving portion 221 and a striking portion 222. The striking portion 222 is received in the receiving groove 211, that is, the shape and size of the striking portion 222 correspond to the receiving groove 211, so as to form an interference fit between the striking portion 222 and the receiving groove 211, so that the body 22 can be reliably connected to the cartridge 21; the striking portion 222 extends from the outer surface of the receiving portion 221 away from the cartridge 21, so as to form an striking boss for striking the high-performance fiber filament bundle, in a first direction (the first direction is as shown in FIG. Figure 4 In the second direction (as shown by the solid arrow in the middle), the size of the impact portion 222 is the same as that of the receiving portion 222. Figure 4 As shown by the dashed arrow in the middle, the size of the impact portion 222 is smaller than the accommodating portion 221, wherein the first direction and the second direction are perpendicular to each other and are both perpendicular to the extension direction of the impact portion 222. It can be understood that the impact portion 222 forms a flat protrusion, and the size of the impact portion 222 is fully utilized in the first direction so that the impact portion 222 has a sufficiently large width dimension, thereby increasing the impact area between the impact portion 222 and the high-performance fiber filament bundle, and increasing the possibility that the impact portion 222 can hit the high-performance fiber filament bundle. At the same time, the impact portion 222 is narrowed in the second direction, thereby reducing the air resistance of the impact portion 222 during flight.

[0031] Optional, such as Figure 4 As shown, the end of the impact portion 222 away from the accommodating portion 221 forms an arc-shaped curved surface 223, and the arc-shaped curved surface 223 is used to directly contact the high-performance fiber filament bundle when colliding the high-performance fiber filament bundle. By forming the contact surface into the arc-shaped curved surface 223, the shearing effect on the high-performance fiber filament bundle caused by the contact of sharp edges or sharp corners with the high-performance fiber filament bundle is reduced, and the stress state of the impact portion 222 during the collision with the high-performance fiber filament bundle is simplified. Moreover, the arc-shaped curved surface 223 can also reduce the air resistance of the impact portion 222 during flight.

[0032] Optional, such as Figure 4As shown, the outer surface of the impact portion 222 forms an uneven structure, that is, the outer surface of the impact portion 222 is not a completely smooth surface, so as to increase the friction when the impact portion 222 contacts the high-performance fiber filament bundle, thereby reducing the risk of slippage between the impact portion 222 and the high-performance fiber filament bundle, and simplifying the stress state of the high-performance fiber filament bundle. Specifically, the attenuation of the kinetic energy of the high-speed impact component is largely determined by the fracture mechanism of the high-performance fiber filament bundle, and the fracture mechanism of the high-performance fiber filament bundle is controlled by many factors. Therefore, in the process of projectile-target interaction, the influencing factors are eliminated as much as possible, and the stress state of the yarn is stabilized, which can improve the data repetition rate and help analyze the performance of the yarn. By simplifying the stress state of the high-performance fiber filament bundle, the data repetition rate can be improved, which is helpful for analyzing the performance of the yarn. The uneven structure of the outer surface of the impact part 222 can be formed in any way. For example, a plurality of spaced grooves can be formed on the outer surface of the impact part 222 by machining. For example, an oxide layer can be formed on the outer surface of the impact part 222 by oxidizing the impact part 222, so that the oxide layer forms an uneven structure. In some embodiments, as Figure 5 As shown, the clamping assembly 10 includes: a clamping frame 11 and wire rollers 12, two wire rollers 12 are connected to the clamping frame 11, and the axes of the two wire rollers 12 are arranged at intervals. By connecting the ends of the high-performance fiber filament bundle to the two wire rollers 12 respectively, the high-performance fiber filament bundle can be fixed and the high-performance fiber filament bundle can be straightened to facilitate the impact test of the high-performance fiber filament bundle, wherein the wire roller 12 has a wire groove 121, and the wire groove 121 is used for winding the high-performance fiber filament bundle. By winding the end of the high-performance fiber filament bundle in the wire groove 121, the end of the high-performance fiber filament bundle can be fixed by the friction between different parts of the high-performance fiber filament bundle and the friction between the high-performance fiber filament bundle and the inner wall of the wire groove 121, thereby reliably fixing the high-performance fiber filament bundle to the wire roller 12.

[0033] Optional, such as Figure 5 As shown, the wire roller 12 is rotatably connected to the clamping frame 11, and the rotation axis of the wire roller 12 coincides with the axis of the wire roller 12. By rotating the wire roller 12, the tension of the high-performance fiber filament bundle can be adjusted, thereby being able to test the impact resistance of the high-performance fiber filament bundle at different tension levels.

[0034] In some embodiments, Figure 5As shown, the clamping assembly 10 also includes a sliding platform 13 and a sliding frame 14, the clamping frame 11 is fixed to the sliding platform 13, the sliding platform 13 is slidably connected to the sliding frame 14, and the sliding platform 13 can drive the clamping frame 11 and the wire roller 12 to slide relative to the sliding frame 14, wherein the sliding direction of the sliding platform 13 relative to the sliding frame 14 is parallel to the axial direction of the wire roller 12, and the relative position relationship between the wire roller 12 and the high-performance fiber filament bundle and the launch tube 11 can be adjusted by sliding the sliding platform 13 relative to the sliding frame 14, so that the position of the sliding platform 13 and the high-performance fiber filament bundle can be adjusted according to the motion trajectory of the high-speed impact assembly 20, thereby improving the hit rate of the high-speed impact assembly 20. Optionally, the sliding platform 13 and the sliding frame 14 are connected by an adjustment structure, and the adjustment structure can drive the sliding platform 13 to slide relative to the sliding frame 14, and the connection structure can be a threaded structure or a worm gear structure, so that the position of the sliding platform 13 can be accurately adjusted.

[0035] In some embodiments, Figure 6 As shown, the lateral high-speed impact testing device 1 also includes a speed measuring device 40. The two speed measuring devices 40 are arranged at intervals along the extension direction of the launch tube 31, and the two speed measuring devices 40 are respectively located on both sides of the clamping assembly 10. The two speed measuring devices 40 can obtain the speed of the high-speed impact assembly 20 before and after impacting the high-performance fiber filament bundle 2. The impact resistance of the high-performance fiber filament bundle 2 can be obtained through the difference between the speed before impact and the speed after installation. The speed measuring device 40 can be an infrared speed measuring device. The process and principle of obtaining the impact resistance of the high-performance fiber filament bundle 2 are exemplified below in combination with the test process.

[0036] The laboratory temperature was 24 degrees and the humidity was 20%. A first-stage light gas gun was used for ballistic experiments. The barrel had no rifling, the inner diameter of the launch tube was 14 mm, and the length was 1.8 meters. High-pressure nitrogen was used for pressurization. The projectile drag and projectile were accelerated in the barrel to control the impact speed within the range of 0-300 m / s. The impact resistance of the high-performance fiber filament bundle 2 was calculated by the following formula: Among them, Δ E It is the kinetic energy lost by the high-speed impact component during the penetration process. m is the mass of the projectile, v 1 and v2 are the impact speed and residual speed of the projectile respectively. The greater the kinetic energy lost in the penetration process of the high-speed impact component, the better the effect of the high-performance fiber filament bundle 2 in absorbing the impact, that is, the stronger the impact resistance of the high-performance fiber filament bundle 2. It should be noted that the speed measuring device 40 is arranged on both sides close to the high-performance fiber filament bundle 2, and the speed of the high-speed impact component 20 before and after impacting the high-performance fiber filament bundle 2 can be directly measured, which reduces the influence of the air resistance of the high-speed impact component 20 during flight on the calculation of the impact resistance of the high-performance fiber filament bundle 2.

[0037] Optional, such as Figure 6 As shown, the lateral high-speed impact testing device 1 also includes a projectile recovery structure 50, which is located on the side of the high-performance fiber filament bundle 2 away from the launch tube 31. The high-speed impact component 20 can stop moving behind the projectile recovery structure 50, so as to facilitate the recovery of the high-speed impact component 20 and reduce the risk of safety hazards caused by the high-speed impact component 20 to surrounding personnel. The projectile recovery structure 50 can be made of vulcanized rubber.

[0038] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A transverse high-speed impact test device for high-performance fiber filament bundles, characterized in that: The lateral high-speed impact testing device comprises: A clamping assembly, used for clamping the high-performance fiber filament bundle; A high-speed impact component, used for impacting the high-performance fiber filament bundle; A launching assembly, used for driving the high-speed impact assembly to impact the high-performance fiber filament bundle through high-pressure gas; The launching assembly includes a launching tube and a pressurizing device, wherein the launching tube has a launching cavity, the pressurizing device has a pressurizing cavity, one end of the launching cavity can be connected to the pressurizing cavity, the other end of the launching cavity forms a launching port, and the extending direction of the launching tube is perpendicular to the arrangement direction of the high-performance fiber filament bundle; The launching assembly also includes a control valve, which is located between the launching chamber and the pressurizing chamber. The control valve is used to connect the launching chamber with the pressurizing chamber when the gas pressure in the pressurizing chamber reaches a target pressure value, so that the high-pressure gas drives the high-speed impact assembly in the launching chamber to shoot at the high-performance fiber filament bundle.

2. The lateral high-speed impact testing device according to claim 1, characterized in that: The pressurized chamber has an air inlet and an air outlet, the air inlet is connected to an air source and has a pressurized valve, the air outlet has a launch valve, and the control valve is a differential pressure valve; When the pressurizing valve is open and the exhaust valve is closed, the gas of the gas source enters the pressurizing chamber through the air inlet and causes the pressure differential valve to be located in the first position; when the pressurizing valve is closed and the exhaust valve is open, the gas in the pressurizing chamber is discharged through the exhaust port and causes the pressure differential valve to be located in the second position, wherein, when the pressure differential valve is located in the first position, the pressurizing chamber is isolated from the launching chamber, and when the pressure differential valve is located in the second position, the pressurizing chamber is connected to the launching chamber.

3. The lateral high-speed impact testing device according to claim 1, characterized in that: The high-speed impact assembly comprises: A buttstock, the buttstock having a receiving groove, the buttstock being capable of blocking the firing chamber; The projectile body is partially accommodated in the accommodating groove and is detachably connected to the projectile support.

4. The lateral high-speed impact testing device according to claim 3, characterized in that: The sabot has a tail fin.

5. The lateral high-speed impact testing device according to claim 2 or 3, characterized in that: The projectile comprises: A receiving portion, received in the receiving groove; The impact portion extends from the outer surface of the accommodating portion away from the bullet holder. In a first direction, the size of the impact portion is the same as that of the accommodating portion, and in a second direction, the size of the impact portion is smaller than that of the accommodating portion, wherein the first direction and the second direction are perpendicular to each other and are both perpendicular to the extension direction of the impact portion.

6. The lateral high-speed impact testing device according to claim 5, characterized in that: The end of the impact portion away from the accommodation portion forms an arc-shaped curved surface; and / or, The outer surface of the impact part is an uneven structure.

7. The lateral high-speed impact testing device according to claim 1, characterized in that: The clamping assembly comprises: Clamping frame; Line rollers, two of which are connected to the clamping frame, and the axes of the two line rollers are arranged at intervals; Wherein, the wire roller has a wire groove, and the wire groove is used for winding the high-performance fiber filament bundle.

8. The lateral high-speed impact testing device according to claim 7, characterized in that: The line roller is rotatably connected to the clamping frame, and the rotation axis of the line roller coincides with the axis of the line roller.

9. The lateral high-speed impact testing device according to claim 7 or 8, characterized in that: The clamping assembly also includes: A sliding platform is fixedly connected to the clamping frame; A sliding frame, slidably connected to the sliding platform; Wherein, the sliding direction of the sliding platform relative to the sliding frame is parallel to the axial direction of the wire roller.

10. The lateral high-speed impact testing device according to claim 1, characterized in that: The lateral high-speed impact testing device also includes: The two speed measuring devices are arranged at intervals along the extension direction of the launch tube, and the two speed measuring devices are respectively located on both sides of the clamping assembly.

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