A dynamic ballistic impact test system for transmission shafts

Abstract

The present invention proposes a dynamic anti-ballistic impact test system for a transmission shaft, comprising: both ends of the transmission shaft pass through the side walls of a protective box and are both connected to the driving assembly in a transmission manner; the side walls of the protective box are provided with an incident observation window, an exit observation window, and an incident port; an exit high-speed camera, an incident high-speed camera, and a projectile firing device act on the side walls of the transmission shaft through the incident observation window, the exit observation window, and the incident port, respectively. The present application proposes a dynamic anti-ballistic impact test system for a transmission shaft, which is suitable for dynamic anti-ballistic impact testing of transmission shafts under indoor environmental conditions. While projectiles are being incident through the protective box, windows for light source illumination and high-speed photography are reserved, which can ensure the safety of test equipment and personnel. The dynamic operation of the transmission shaft is always maintained by the driving assembly, so that the anti-ballistic impact test of the transmission shaft is achieved while it is in dynamic operation and with a torque load applied.

Description

Technical Field

[0001] The invention belongs to the technical field of helicopter transmission systems, and in particular relates to a dynamic ballistic impact resistance test system for a transmission shaft. Background Art

[0002] Before official use, drive shafts must be designed for ballistic damage resistance. This requires ballistic damage testing of key parts of the transmission system to assess the damage to the helicopter from bullets and verify the helicopter's ability to continue safe flight for a certain period of time after sustaining damage from bullets. Previously, helicopter drive shaft ballistic damage testing involved performing ballistic damage tests on the tail drive shaft under static, no-torque load conditions. The test then applied a torque load to the shaft while it was in operation, and continued for a certain period of time to assess the shaft's ballistic damage resistance.

[0003] Because under normal circumstances, shooting ranges that meet the conditions for bullet impact (i.e., the ability to complete the firing of bullets and the safety protection after the bullet hits the drive shaft) do not have the corresponding test equipment to drive the tail drive shaft to the test speed and apply a torque load; and the equipment that meets the test conditions (i.e., the ability to drive the tail drive shaft to the test speed and apply a torque load) is usually arranged in the test workshop, equipped with a large number of operating equipment such as motors, gearboxes, sensors, accompanying test drive shafts and bearing seats, but lack corresponding bullet firing devices and safety protection devices for test equipment and personnel after the drive shaft is impacted. As a result, an effective anti-bullet impact test for the drive shaft in a state of dynamic operation and torque load has not yet been carried out.

[0004] Therefore, there is currently no effective test method and protective device that can carry out impact tests on drive shaft components under dynamic operating conditions with torque loads applied in indoor environments, which directly affects the installation of the drive shaft, the injection of the projectile, and the test observation and recording of the impact process. Summary of the Invention

[0005] In order to solve the above problems, the present invention proposes a dynamic anti-ballistic test system for a transmission shaft, comprising: a projectile firing device, an outgoing high-speed camera, a protective box, a transmission shaft, an incident high-speed camera, and a driving assembly;

[0006] A chamber is provided inside the protective box, and a transmission shaft is horizontally arranged in the chamber. Both ends of the transmission shaft respectively pass through the side walls of the protective box and are both connected to the drive assembly.

[0007] The side wall of the protective box is provided with an incident observation window, an exit observation window and an incident passage. The exit high-speed camera, the incident high-speed camera and the projectile firing device act on the transmission shaft through the incident observation window, the exit observation window and the incident passage respectively.

[0008] Furthermore, the side wall in the protective box cavity, which is arranged opposite to the projectile firing device, is composed of a steel plate, a rubber plate, a first armored steel plate, a high-density plate, and a second armored steel plate stacked in sequence.

[0009] Furthermore, it also includes a torque and speed sensor, a displacement sensor, an aircraft skin frame, an outgoing light source, a top light source and an illumination window;

[0010] The torque and speed sensor is connected to one end of the transmission shaft and is used to test the speed and torque of the transmission shaft;

[0011] The displacement sensor is sleeved with the transmission shaft and is used to test the displacement of the projectile when it hits the transmission shaft;

[0012] The aircraft skin frame is arranged between the transmission shaft and the incident port to simulate the aircraft shell;

[0013] The outgoing light source is arranged beside the outgoing high-speed camera and is used to illuminate the outgoing end position of the projectile hitting the transmission shaft;

[0014] The irradiation window is arranged at the top of the chamber, and the top light source irradiates the incident end position of the projectile hitting the transmission shaft through the irradiation window.

[0015] Furthermore, the protective box includes a front protective plate, an incident end protective plate, a right protective plate, a rear protective plate, a lower protective plate, a left protective plate, and an upper protective plate that are spliced ​​together;

[0016] The front guard plate, the right guard plate, the rear guard plate, the lower guard plate, the left guard plate and the upper guard plate all face the transmission shaft and are arranged one by one on the front side, the right side, the rear side, the lower side, the left side and the upper side of the transmission shaft respectively;

[0017] The left and right side walls of the incident end protection plate are connected to the side walls of the front protection plate and the right side protection plate, and the incident end protection plate maintains a predetermined angle with the front protection plate and the right side protection plate;

[0018] The side walls of the front protective plate, the rear protective plate, the incident end protective plate and the upper protective plate are respectively provided with an incident observation window, an exit observation window, an incident port and an irradiation window.

[0019] Furthermore, the protective box also includes a main frame, which is detachably connected to the upper protective plate and the lower protective plate by bolts. The side walls of the connecting rod of the main frame are provided with card slots, and the front protective plate, the incident end protective plate, the right protective plate, the rear protective plate, and the left protective plate are all connected to the main frame through the card slots.

[0020] Furthermore, the front protective plate, the incident end protective plate, the right protective plate, the lower protective plate, the left protective plate, and the upper protective plate are all composed of pine wood boards, the first armored steel plate, the high-density board, and the second armored steel plate stacked in sequence.

[0021] Furthermore, the outer walls of the front protective plate, the rear protective plate and the upper protective plate are all installed with bulletproof glass, and the incident observation window, the exit observation window and the illumination window are all covered with bulletproof glass.

[0022] Furthermore, a baffle is embedded in the incident port, and the upper and lower side walls of the baffle are slidably connected to the upper and lower inner walls of the incident port respectively. The baffle slides left and right to change the position of the through hole of the projectile passing through the incident port.

[0023] Furthermore, flanges are installed on the side walls of the right and left protective plates, the inner ring side walls of the flanges are rotatably connected to the outer wall of the transmission shaft, and the right and left protective plates both adopt a split-half structure.

[0024] Furthermore, the drive assembly includes two drive motors and two bearing seats respectively arranged at both ends of the transmission shaft;

[0025] The two ends of the transmission shaft are rotatably connected to the two bearing seats arranged on both sides of the protective box body respectively;

[0026] One end of the transmission shaft is connected to the drive motor on one side through a speed-increasing gearbox, and the other end of the transmission shaft is connected to the drive motor on the other side through a speed-reducing gearbox.

[0027] The present application proposes a dynamic ballistic impact test system for a transmission shaft, which is suitable for dynamic ballistic impact tests of transmission shafts under indoor environmental conditions. Through the protective box, while the projectile is being shot, protection is completed in all directions of the impact point, and windows for light source illumination and high-speed camera are reserved, which can ensure the safety of test equipment and personnel, and has sufficient safety margin. The dynamic operation of the transmission shaft is always maintained through the driving component, and the ballistic impact test of the transmission shaft is realized when the transmission shaft is in dynamic operation and torque load is applied, thereby meeting the requirements for observing and recording data of the dynamic transmission shaft impact process.

[0028] At the same time, the present application absorbs, buffers and contains the impacting projectiles and their fragments through the interlayer or buffer structure design of the protective box, thereby reducing secondary damage to the subject. The pine wood boards, ordinary steel plates, rubber plates, bulletproof glass, armored steel plates, etc. of the protective box can be replaced individually according to the damage situation, without replacing the entire protective device, reducing the cost of use, and effectively solving the problems of transmission shaft installation, bullet injection, observation and recording of the impact process, absorption and treatment of impact bullets and fragments, and safety protection of test equipment and personnel.

[0029] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic top view of a transmission shaft dynamic ballistic impact test system according to an embodiment of the present invention is shown;

[0032] Figure 2 A schematic top cross-sectional view of a transmission shaft dynamic ballistic impact test system according to an embodiment of the present invention is shown;

[0033] Figure 3 A schematic front view of a transmission shaft dynamic ballistic impact test system according to an embodiment of the present invention is shown;

[0034] Figure 4 The schematic diagram of the protective box in the embodiment of the present invention is shown. Figure 1 ;

[0035] Figure 5 The schematic diagram of the protective box in the embodiment of the present invention is shown. Figure 2 ;

[0036] Figure 6 The sandwich structure of the rear guard plate in the embodiment of the present invention is shown. Figure 1 ;

[0037] Figure 7 The sandwich diagram of the rear protection plate in the embodiment of the present invention is shown. Figure 2 ;

[0038] Figure 8 The sandwich diagram of the right side protective plate in the embodiment of the present invention is shown. Figure 1 ;

[0039] Figure 9 The sandwich diagram of the right side protective plate in the embodiment of the present invention is shown. Figure 2 .

[0040] In the figure, there are a projectile firing device 1, a torque and speed sensor 2, a bearing seat 3, an output high-speed camera 4, an output light source 5, a displacement sensor 6, a protective box 7, a front protective plate 71, an incident end protective plate 72, a right side protective plate 73, a rear protective plate 74, a lower protective plate 75, a left side protective plate 76, a main frame 77, an upper protective plate 78, a transmission shaft 8, an incident high-speed camera 9, an aircraft skin frame 10, a steel plate 11, a rubber plate 12, a first armored steel plate 13, a high-density board 14, a second armored steel plate 15, a bulletproof glass 16, a pine board 17, a top light source 18, and a flange 19. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0042] The present invention provides a transmission shaft dynamic anti-ballistic test system. Figure 1 FIG. 1 shows a top view of a dynamic anti-ballistic test system for a transmission shaft according to an embodiment of the present invention, with reference to FIG. Figure 1 and Figure 2 The transmission shaft dynamic anti-ballistic impact test system includes: a projectile firing device 1, an outgoing high-speed camera 4, a protective box 7, a transmission shaft 8, an incident high-speed camera 9, and a driving component;

[0043] A chamber is provided inside the protective box 7, and a transmission shaft 8 is horizontally arranged in the chamber. Both ends of the transmission shaft 8 respectively penetrate the side walls of the protective box 7 and are both connected to the drive assembly.

[0044] The side wall of the protective box 7 is provided with an incident observation window, an exit observation window and an incident passage. The exit high-speed camera 4, the incident high-speed camera 9 and the projectile firing device 1 act on the transmission shaft 8 through the incident observation window, the exit observation window and the incident passage respectively.

[0045] The present invention provides an experimental space for the impact test of the transmission shaft 8 through the protective box 7, and realizes the application of torque load to the transmission shaft 8 under the drive of the driving component. The detailed process of the projectile fired by the projectile firing device 1 hitting the transmission shaft 8 can be observed and recorded in detail through the outgoing high-speed camera 4 and the incident high-speed camera 9, thereby improving the accuracy of the impact test data of the transmission shaft 8.

[0046] refer to Figure 6, according to the side wall arranged opposite to the projectile firing device 1 in the chamber of the protective box 7 as the main impact bearing object of the projectile, the side wall is composed of a steel plate 11, a rubber plate 12, a first armor steel plate 13, a high-density plate 14, and a second armor steel plate 15 stacked in sequence;

[0047] Among them, a 1-2mm steel plate 11 is used as the first interlayer, and the projectile is decelerated for the first time on the basis of ensuring that the projectile can penetrate the steel plate; and on the basis of its own strength, the fragments generated by the projectile penetrating the steel plate 11 and the rubber plate 12 and impacting the first armored steel plate 13 are contained in the interlayer formed by the steel plate 11 and the first armored steel plate 13, so that the steel plate 11 not only decelerates the entry of the projectile, but also blocks the ejection of the projectile fragments.

[0048] Correspondingly, a 20mm rubber plate 12 is used as the second interlayer, and a second deceleration operation is performed on the basis of the first deceleration operation of the projectile using a 1-2mm steel plate 11, further reducing the kinetic energy of the projectile impacting the first armored steel plate 13, and decelerating and containing the fragments generated after the projectile impacts the first armored steel plate 13, reducing the kinetic energy of the fragments impacting the steel plate 11, and under the buffering properties of the soft rubber material of the rubber plate 12 itself, further avoiding the fragments generated when the projectile and its fragments penetrate and causing secondary damage to the drive shaft 8.

[0049] Correspondingly, a 10 mm first armored steel plate 13 is used as the third partition layer to withstand the impact of the projectile after two decelerations, and to form a storage space with the steel plate 11 for accommodating the fragments generated after the projectile impacts the first armored steel plate 13.

[0050] Correspondingly, a 30 mm high-density board 14 is used as the fourth barrier layer to decelerate the projectile and its fragments that accidentally penetrate the first armor plate 13;

[0051] A 15mm second armored steel plate 15 is used as the fifth barrier layer to withstand the impact of projectiles and their fragments that accidentally penetrate the 10mm first armored steel plate 13, ensuring that the protective device has sufficient safety margin and ensuring the safety of test equipment and personnel.

[0052] exist Figure 2 In the example shown, it also includes a torque and speed sensor 2, a displacement sensor 6, an aircraft skin frame 10, an outgoing light source 5, a top light source 18 and an illumination window;

[0053] The torque and speed sensor 2 is sleeved with one end of the transmission shaft 8 and is used to test the speed and torque of the transmission shaft 8;

[0054] The displacement sensor 6 is sleeved with the transmission shaft 8 and installed at the incident end of the projectile hitting the transmission shaft 8 to avoid being damaged by the projectile and its fragments. It is used to measure the displacement of the transmission shaft 8 during the projectile hitting the transmission shaft 8;

[0055] The aircraft skin frame 10 is arranged between the transmission shaft 8 and the incident passage, and is used to simulate the aircraft shell;

[0056] The outgoing light source 5 is arranged beside the outgoing high-speed camera 4 and is used to illuminate the outgoing end position of the projectile hitting the transmission shaft 8, meeting the light intensity requirement of the outgoing high-speed camera 4 when shooting;

[0057] The illumination window is arranged at the top of the chamber, and the top light source 18 illuminates the incident end position of the projectile on the transmission shaft 8 through the illumination window, meeting the light intensity requirement when the incident high-speed camera 9 is shooting.

[0058] refer to Figure 4 and Figure 5 The protective box 7 includes a front protective plate 71, an incident end protective plate 72, a right protective plate 73, a rear protective plate 74, a lower protective plate 75, a left protective plate 76, and an upper protective plate 78, which are spliced ​​together. Among them, the rear protective plate 74 is the side wall of the chamber of the protective box 7 that is arranged opposite to the projectile firing device 1. That is, the rear protective plate 74 is composed of a steel plate 11, a rubber plate 12, a first armor steel plate 13, a high-density plate 14, and a second armor steel plate 15 stacked in sequence;

[0059] The front guard plate 71, the right guard plate 73, the rear guard plate 74, the lower guard plate 75, the left guard plate 76, and the upper guard plate 78 all face the transmission shaft 8 and are arranged one-to-one on the front side, right side, rear side, lower side, left side, and upper side of the transmission shaft 8, respectively, to achieve protection on six sides;

[0060] The left and right side walls of the incident end protection plate 72 are connected to the side walls of the front protection plate 71 and the right side protection plate 73, and the incident end protection plate 72 maintains a predetermined angle with the front protection plate 71 and the right side protection plate 73;

[0061] The side walls of the front protective plate 71 , the rear protective plate 74 , the incident end protective plate 72 and the upper protective plate 78 are respectively provided with an incident observation window, an exit observation window, an incident port and an irradiation window.

[0062] Correspondingly, the transmission shaft 8 is horizontally arranged in the chamber, and the two ends of the transmission shaft 8 pass through the side walls of the right protective plate 73 and the left protective plate 76 respectively; at the same time, a front observation window and a rear observation window are opened on the side walls of the front protective plate 71 and the rear protective plate 74 respectively, and the front observation window and the rear observation window are arranged in oblique symmetry.

[0063] The left and right side walls of the incident end protective plate 72 are connected to the side walls of the front protective plate 71 and the right protective plate 73, and the incident end protective plate 72 maintains a predetermined angle with the front protective plate 71 and the right protective plate 73. An incident opening is opened on the side wall of the incident end protective plate 72 so that the incident opening is symmetrical with the front observation window. The point where the projectile of the projectile firing device 1 hits the rear protective plate 74 is also symmetrical with the rear observation window, forming a cross shape.

[0064] In addition, an illumination window is opened on the upper protective plate 78 so that the light from the top light source 18 can be irradiated from directly above the chamber, irradiating the incident end position of the projectile on the transmission shaft 8, thereby meeting the illumination requirements of the incident high-speed camera 9 for shooting.

[0065] Specifically, in addition to the protective plates for the front, rear, left, right, top, and bottom directions, as well as the protective plate for the projectile's incident direction, these seven protective plates provide all-round protection. The protective box 7 also includes a main frame 77. The main frame 77 is detachably connected to the upper protective plate 78 and the lower protective plate 75 by bolts. The side walls of the connecting rods of the main frame 77 are each provided with a slot, and the front protective plate 71, the incident end protective plate 72, the right protective plate 73, the rear protective plate 74, and the left protective plate 76 are all connected to the main frame 77 through the slots.

[0066] The main frame 77 is used to assemble and combine the various protective plates to complete the complete protective box 7, which can prevent projectile fragments from squeezing out of the gaps and causing collateral damage to test equipment or personnel to the greatest extent. It also improves the convenience of assembling and disassembling the protective plates. After the experiment, it is convenient to carry out corresponding replacement, maintenance, and inspection of the protective plates of the protective box 7.

[0067] refer to Figure 8 The front protective plate 71, the incident end protective plate 72, the right protective plate 73, the lower protective plate 75, the left protective plate 76, and the upper protective plate 78 are all composed of a pine wood board 17, a first armor steel plate 13, a high-density board 14, and a second armor steel plate 15 stacked in sequence;

[0068] Among them, a 1-2 mm thick pine board 17 is used to absorb and contain fragments generated after the projectile impacts the rear guard plate 74, decelerate such fragments, and ensure that the fragments do not cause secondary damage to the tested transmission shaft 8;

[0069] Correspondingly, a 10mm first armor steel plate 13 is used to withstand the impact of projectile fragments after being decelerated by the pine board 17, and to block projectiles that accidentally penetrate the pine board 17;

[0070] Correspondingly, a 30mm high-density plate 14 is used to decelerate the projectile and its fragments that accidentally penetrate the first armor plate 13.

[0071] A 15mm second armored steel plate 15 is used to withstand the impact of projectiles and their fragments that accidentally penetrate the first armored steel plate 13. The double-layer protection ensures that the protective device has sufficient safety margin, further ensuring the safety of test equipment and personnel.

[0072] At the same time, reference Figure 7 In order to meet the operational requirements of high-speed camera shooting and light source irradiation as well as the requirements of protection and safety, bulletproof glass is installed on the outer walls of the front protective plate 71, the rear protective plate 74 and the upper protective plate 78, so that the incident observation window, the exit observation window and the irradiation window are all covered with bulletproof glass, which meets the requirements of camera shooting and light source irradiation, and has sufficient strength to prevent fragments generated by the impact of the projectile from rushing out from the corresponding windows and causing collateral damage to the test equipment and personnel.

[0073] refer to Figure 3 、 Figure 5 In the example shown, a baffle is embedded in the incident port, and the upper and lower side walls of the baffle are slidably connected to the upper and lower inner walls of the incident port in a one-to-one correspondence, so that the baffle can slide left and right in the incident port, and the side wall area of ​​the baffle is half of the area of ​​the incident port, that is, when the baffle is located on the left side of the incident port, the output end of the projectile firing device 1 can launch the projectile from the right side of the baffle into the chamber, and when the baffle is located on the right side of the incident port, the output end of the projectile firing device 1 can launch the projectile from the left side of the baffle into the chamber, and the baffle is located on the right side of the incident port. The position of the through hole of the projectile passing through the incident port is changed by sliding the baffle left and right, thereby further expanding the angle and orientation of the incident projectile, reducing the area of ​​the unprotected area of ​​the protective box 7, and expanding the applicability of the protective box 7 to different incident angles of the projectile.

[0074] refer to Figure 9 In the example shown, the side walls of the right protective plate 73 and the left protective plate 76 corresponding to the drive shaft 8 are both provided with through holes, and flanges 19 are installed in the through holes. The inner ring side walls of the flanges 19 are rotatably connected to the outer wall of the drive shaft 8, and the right protective plate 73 and the left protective plate 76 both adopt a half-type structure, that is, the right protective plate 73 and the flange 19 installed on the right protective plate 73 are divided into two components that are adapted and spliced ​​in the upper and lower parts by the horizontal center line of the flange 19 to facilitate the installation and disassembly of the drive shaft 8; when facing drive shafts 8 of different diameters in the later stage, the flanges 19 with different inner diameters but the same outer diameters can be directly replaced to ensure that the outer wall of the drive shaft 8 is rotatably connected to the inner wall of the flange 19, and the outer wall of the flange 19 fits with the inner wall of the through hole, thereby improving the practicality of the device of the present application.

[0075] Specifically, in order to ensure that the transmission shaft 8 can still use a stable speed and torque when it is impacted by a projectile, the drive components are respectively arranged at two drive motors and two bearing seats 3 at both ends of the transmission shaft 8;

[0076] The two ends of the transmission shaft 8 are respectively connected to the two bearing seats 3 arranged on both sides of the protective box 7 in a one-to-one corresponding rotation manner. One end of the transmission shaft 8 is connected to the drive motor on one side through a speed-increasing gearbox, and the other end of the transmission shaft 8 is connected to the drive motor on the other side through a speed-reducing gearbox, thereby improving the stability of the rotation operation of the transmission shaft 8.

[0077] During actual use of the dynamic anti-ballistic test system for the transmission shaft of the present application, a rated torque load is applied to the transmission shaft 8 as required, and the projectile incident angle of the projectile firing device 1 is directionally adjusted. After the projectile is fired from the projectile firing device toward the transmission shaft 8, the projectile will penetrate the transmission shaft 8, impact from the front side of the transmission shaft 8 to the rear side and rush into the rear protective plate 74. Due to the inclined arrangement of the projectile firing device 1, the projectile will penetrate the through hole of the transmission shaft 8 and the projectile firing device 1 will also maintain an inclined forward direction after entering the rear protective plate 74, directly preventing the projectile from being ejected from the entrance of the rear protective plate 74. The steel plate 11, rubber plate 12 and first armored steel plate 13 prevent the projectile from rebounding from the interlayer between the steel plate 11 and the first armored steel plate 13, directly preventing the projectile from rebounding multiple times in the chamber of the protective box 7.

[0078] The present application proposes a dynamic ballistic impact test system for a transmission shaft, which is suitable for dynamic ballistic impact tests of a transmission shaft 8 under indoor environmental conditions. Through the protective box 7, while the projectile is incident, protection is completed in all directions of the impact point 6, and windows for light source illumination and high-speed camera are reserved, which can ensure the safety of test equipment and personnel, and has sufficient safety margin. The dynamic operation of the transmission shaft 8 is always maintained through the driving component, and the ballistic impact test of the transmission shaft 8 is realized when the transmission shaft 8 is in dynamic operation and torque load is applied, thereby meeting the requirements for observing and recording data of the dynamic transmission shaft 8 impact process.

[0079] At the same time, the present application absorbs, buffers and contains the projectiles and fragments that have completed the impact through the interlayer or buffer structure design of the protective box 7, thereby reducing secondary damage to the subject. The pine wood boards 17, ordinary steel plates, rubber plates, bulletproof glass, armored steel plates, etc. of the protective box 7 can be replaced individually according to the damage situation, without replacing the entire protective device, reducing the cost of use, and effectively solving the problems of installation of the drive shaft, injection of the bullet, observation and recording of the impact process, absorption and processing of the impact bullet and fragments, and safety protection of test equipment and personnel.

[0080] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A transmission shaft dynamic anti-ballistic test system, characterized in that: include: Projectile firing device (1), exit high-speed camera (4), protective box (7), transmission shaft (8), incident high-speed camera (9), driving assembly; The protection box (7) has a chamber formed inside, and the transmission shaft (8) is horizontally arranged in the chamber. Both ends of the transmission shaft (8) respectively penetrate the side walls of the protection box (7) and are both connected to the drive assembly in a transmission manner. The side wall of the chamber of the protective box (7) arranged opposite to the projectile firing device (1) is composed of a steel plate (11), a rubber plate (12), a first armored steel plate (13), a high-density plate (14), and a second armored steel plate (15) stacked in sequence; The protective box (7) includes an incident end protective plate (72), a side wall of the incident end protective plate (72) is provided with an incident opening, a baffle is embedded in the incident opening, and the upper and lower side walls of the baffle are slidably connected to the upper and lower inner walls of the incident opening in a one-to-one correspondence, and the baffle slides left and right to change the position of the through hole of the projectile passing through the incident opening; The side wall of the protective box (7) is also provided with an incident observation window and an exit observation window, and the exit high-speed camera (4), the incident high-speed camera (9), and the projectile firing device (1) act on the transmission shaft (8) through the incident observation window, the exit observation window, and the incident opening respectively. It also includes a torque and speed sensor (2), a displacement sensor (6), an aircraft skin frame (10), an outgoing light source (5), a top light source (18) and an illumination window; The torque and speed sensor (2) is sleeved with one end of the transmission shaft (8) and is used to test the speed and torque of the transmission shaft (8); The displacement sensor (6) is sleeved with the transmission shaft (8) and is used to measure the displacement of the projectile when it strikes the transmission shaft (8); The aircraft skin frame (10) is arranged between the transmission shaft (8) and the incident port and is used to simulate the aircraft shell; The exit light source (5) is arranged beside the exit high-speed camera (4) and is used to illuminate the exit end position of the projectile hitting the transmission shaft (8); The irradiation window is arranged at the top of the chamber, and the top light source (18) irradiates the incident end position of the projectile hitting the transmission shaft (8) through the irradiation window.

2. The transmission shaft dynamic anti-ballistic impact test system according to claim 1, characterized in that: The protective box (7) further comprises a front protective plate (71), a right protective plate (73), a rear protective plate (74), a lower protective plate (75), a left protective plate (76), and an upper protective plate (78) which are spliced ​​together. The front protective plate (71), the right protective plate (73), the rear protective plate (74), the lower protective plate (75), the left protective plate (76), and the upper protective plate (78) all face the transmission shaft (8) and are arranged one by one on the front side, the right side, the rear side, the lower side, the left side, and the upper side of the transmission shaft (8); The left and right side walls of the incident end protection plate (72) are connected to the side walls of the front protection plate (71) and the right side protection plate (73), and the incident end protection plate (72) maintains a predetermined angle with the front protection plate (71) and the right side protection plate (73); An incident observation window, an exit observation window, and an irradiation window are respectively provided on the side walls of the front protective plate (71), the rear protective plate (74), and the upper protective plate (78).

3. The transmission shaft dynamic anti-ballistic impact test system according to claim 2, characterized in that: The protective box (7) further comprises a main frame (77), wherein the main frame (77) is detachably connected to the upper protective plate (78) and the lower protective plate (75) by bolts, and the side walls of the connecting rod of the main frame (77) are provided with card slots, and the front protective plate (71), the incident end protective plate (72), the right protective plate (73), the rear protective plate (74), and the left protective plate (76) are all connected to the main frame (77) by the card slots.

4. The transmission shaft dynamic anti-ballistic impact test system according to claim 2, characterized in that: The front protective plate (71), the incident end protective plate (72), the right protective plate (73), the lower protective plate (75), the left protective plate (76), and the upper protective plate (78) are all composed of a pine wood board (17), a first armor steel plate (13), a high-density board (14), and a second armor steel plate (15) stacked in sequence.

5. The transmission shaft dynamic anti-ballistic impact test system according to claim 4, characterized in that: The outer walls of the front protective plate (71), the rear protective plate (74), and the upper protective plate (78) are all installed with bulletproof glass (16), and the incident observation window, the exit observation window, and the illumination window are all covered by the bulletproof glass (16).

6. The transmission shaft dynamic anti-ballistic impact test system according to claim 2, characterized in that: The side walls of the right side protection plate (73) and the left side protection plate (76) are both installed with flanges (19), the inner ring side wall of the flange (19) is rotatably connected to the outer wall of the transmission shaft (8), and the right side protection plate (73) and the left side protection plate (76) both adopt a split-half structure.

7. The transmission shaft dynamic anti-ballistic impact test system according to claim 1, characterized in that: The drive assembly comprises two drive motors and two bearing seats (3) respectively arranged at both ends of the transmission shaft (8); The two ends of the transmission shaft (8) are rotatably connected to two bearing seats (3) arranged on both sides of the protective box (7) in a one-to-one correspondence; One end of the transmission shaft (8) is connected to the drive motor on one side via a speed-increasing gearbox, and the other end of the transmission shaft (8) is connected to the drive motor on the other side via a speed-reducing gearbox.

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