Variable-angle inclined water entry test device based on assembled air cannon

Abstract

The invention discloses a variable-angle inclined water entry test device based on an assembled air cannon. The variable-angle inclined water entry test device comprises the assembled air cannon, an adjustable cannon frame and a water tank, the assembled air cannon is clamped on a mounting plate through a plurality of hoops, a rotating seat is mounted on a second cross beam, the middle part of the mounting plate is connected with a rotating part of the rotating seat, a sliding rail is transversely mounted on the gun carriage frame, two limiting sliding blocks are slidably mounted in the sliding rail in parallel, and the upper part of the mounting plate is arranged between the two limiting sliding blocks; the water tank is placed below the adjustable gun carriage, a long-strip-shaped hole is formed in the bottom of the water tank, and a rubber pad is installed on the long-strip-shaped hole in a covering mode. By arranging the adjustable gun carriage, the effect of supporting the air cannon is achieved, the inclination angle of the air cannon is freely adjusted, speed loading of different-angle inclination water entry tests is achieved, and the adjustable gun carriage can be freely adjusted within the inclination angle range of 0-90 degrees theoretically; and the water tank is a reusable water tank, so that the water inlet and outlet water recovery of the test bomb can be completed.

Description

Technical Field

[0001] The invention relates to the technical field of high-speed water entry testing of a rotating body, and in particular to a variable-angle inclined water entry testing device based on an assembled air cannon. Background Art

[0002] The high-speed water entry test of a rotating body is an experiment in which the rotating body is accelerated to a higher speed and then enters the water medium from the air medium to study the accompanying physical phenomena of the water entry process and its mechanistic explanation. Since the water entry process involves phenomena such as medium mutation, instantaneous high overload, and unsteady evolution of liquid-gas conversion cavitation, pure theoretical analysis or theoretical combined with numerical simulation analysis cannot solve the related problems well. The water entry test can provide mechanism phenomena and basic data support, and is an important means to study water entry-related problems. Among them, it is not uncommon to carry out experimental research on the vertical entry of rotating bodies into water based on test loading devices such as air cannons, guns, and light gas cannons. By introducing rotating bodies with different head shapes to carry out high-speed water entry tests, the influence of the shape of the rotating body on the evolution law of water entry cavitation and underwater ballistic stability can be studied. In order to further deepen the research on in-water problems, it is considered to carry out experimental research on the introduction of water entry angle factors, which makes it urgent to have a variable angle inclined water entry test device.

[0003] In the field of variable angle tilt water entry test devices, scholars and engineers have established a variety of variable angle tilt water entry test devices based on various loading devices such as air cannons, guns, and light gas cannons. In order to achieve the angle adjustment function within a certain range of tilt angles, various adjustable brackets and matching water tanks have been designed. For example, in patent CN113865430A, a water entry test loading device based on an air cannon is provided. By introducing an electric push rod and rotating it with the base of the gas cannon, the water entry angle can be freely adjusted within the range of 5°-30°; in patent CN215065164U, a cantilever beam support device is designed, based on a magnetic gravity loading device, to achieve low-speed water entry test loading with adjustable tilt angle; in patent CN108592699A, a water entry test loading device based on a light gas cannon and matching support are designed. By releasing the flange connection between the light gas cannon and the support, presetting it to a specified angle and then restoring the connection, the water entry angle can be adjusted.

[0004] Several variable angle inclined water entry test devices mentioned in the above patents can already meet the requirements of inclined water entry test research under certain conditions. However, they still have great limitations, for example: in patent CN113865430A, the water entry test device can only carry out inclined water entry test within a small inclination range of 5°-30°, and only the loading device design is given, without providing the matching water tank design and the buffer recovery design ideas of the water entry test bomb; in patent CN215065164U, the cantilever beam-based support device provided can realize the large angle range water entry test, but the gravity loading device based on magnetic adsorption can only realize low-speed water entry, and is limited by the cantilever beam structure strength, making it difficult to support large-caliber loading devices; in patent CN108592699A, the angle adjustment method of the support frame of the inclined water entry test device is complicated and laborious, and the specific range of adjustable angle is not given.

[0005] Therefore, it is necessary to develop a variable-angle tilt water entry test device based on an assembled air cannon to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to design a variable-angle inclined water entry test device based on an assembled air cannon in order to solve the above-mentioned problem.

[0007] The present invention achieves the above-mentioned purpose through the following technical solutions: A variable angle tilt water entry test device based on assembled air cannons, comprising: Assemble the air cannon; Adjustable gun mount; the adjustable gun mount comprises a gun mount frame, a slide rail, a plurality of clamps, a rotating seat, a limit clamp, and a mounting plate. The assembled air cannon is clamped on the mounting plate by a plurality of clamps. The assembled air cannon is arranged along the length direction of the mounting plate. The gun mount frame comprises a second cross beam. The rotating seat is mounted on the second cross beam. The middle part of the mounting plate is connected to the rotating part of the rotating seat. The slide rail is transversely mounted on the gun mount frame. The slide rail is placed above the second cross beam. The slide rail is parallel to the second cross beam. The limit clamp comprises two limit sliders. The two limit sliders are parallel to each other and slidably mounted in the slide rail. The upper part of the mounting plate is placed between the two limit sliders. Water tank; the water tank is placed under the adjustable gun mount, the top of the water tank is open, a long hole is opened at the bottom of the water tank, a rubber pad is installed on the long hole, the long hole is parallel to the second beam, and the launch port of the assembled air cannon is aligned with the long hole.

[0008] Specifically, the gun mount frame is a rectangular frame structure composed of multiple gun mount columns, multiple cross columns, and multiple reinforcing ribs. The reinforcing ribs are arranged obliquely, and the two ends of the reinforcing ribs are respectively connected to two adjacent cross columns, adjacent gun mount columns and cross columns.

[0009] Specifically, the rotating seat includes two mounting seats, a rotating shaft, and two rotating bearings. The second beams are two parallel to each other. The two mounting seats are respectively installed on the two second beams. The outer rings of the two rotating bearings are respectively installed on the two mounting seats. The two ends of the rotating shaft are respectively installed in the inner rings of the two rotating bearings. The rotating shaft is perpendicular to the second beams, and the middle part of the rotating shaft is connected to the bottom of the mounting plate.

[0010] Preferably, the slide rail includes two first beams parallel to each other, and slide grooves are provided in opposite sides of the two first beams. The slide grooves are arranged along the length direction of the first beams, and the two ends of the limit slider can be slidably placed in the slide grooves of the two first beams.

[0011] Specifically, the assembled air cannon includes a high-pressure gas source, a gas pipeline, an air chamber, a firing valve, a loading compartment, and a gun barrel. The high-pressure gas source is connected to the first end of the air chamber through the gas pipeline, and the second end of the air chamber, the firing valve, the loading compartment, and the gun barrel are connected in sequence, and the test bullet is placed in the loading compartment.

[0012] Specifically, the loading bay includes a bay and a sleeve. A strip hole for placing the test bullet is provided on the side wall of the bay. The sleeve is sleeved on the outer wall of the bay and is used to block the strip hole.

[0013] Specifically, an external thread is arranged on the side wall of the first end of the bomb bay, an internal thread is arranged on the inner side wall of the first end of the sleeve, and the first end of the bomb bay is threadedly connected to the first end of the sleeve.

[0014] Specifically, the water tank includes a water tank frame, a water tank bottom plate, and four plexiglass plates. The water tank frame is a rectangular frame structure composed of multiple water tank columns and multiple water tank beams; the four plexiglass plates are installed on the side walls of the water tank frame, and the water tank bottom plate is installed at the bottom of the water tank frame.

[0015] Specifically, the water tank further comprises an annular cover plate, which is arranged around the long strip hole, and the edge of the rubber pad is installed between the cover plate and the bottom plate of the water tank.

[0016] Specifically, the water tank further includes a buffer pad, which is installed below the bottom plate of the water tank. The buffer pad includes a buffer pad frame and a buffer material, and the buffer material is filled in the buffer pad frame.

[0017] The beneficial effects of the present invention are: The present application sets up an adjustable gun mount, which not only supports the air cannon, but also realizes the free adjustment of the inclination angle of the air cannon, thereby realizing speed loading of water entry tests at different angles. Theoretically, it can be freely adjusted within the inclination range of 0~90°; and the water tank of the present application is a reusable water tank, which can complete the entry and exit recovery of the test projectile into the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1Schematic diagram of the variable-angle tilt water entry test device based on the assembled air cannon.

[0019] Figure 2 Schematic diagram of the structure for assembling an air cannon.

[0020] Figure 3 This is a schematic diagram of the structure of the ammunition loading bay; Figure 4 It is a side view of the adjustable gun mount; Figure 5 is a front view of the water tank; Figure 6 A top view of the water tank.

[0021] Among them, 1. gun mount column; 2. reinforcement ribs; 3. water tank; 301. water tank bottom plate; 302. water tank crossbeam; 303. cover plate; 304. rubber pad; 305. buffer pad; 306. water tank column; 307. plexiglass plate; 308. pressure plate; 4. gun mount crossbeam; 401. third crossbeam; 402. second crossbeam; 403. first crossbeam; 5. clamp; 6. rotating bearing; 7. limit clamp; 8. mounting plate; 9. assembled air cannon; 901. high-pressure gas source; 902. gas pipeline; 903. air chamber; 904. launch valve; 905. loading bay; 9051. bomb bay; 9052. sleeve; 906. flange; 907. gun barrel. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] like Figure 1 and 4 As shown in 6, a variable angle tilt water entry test device based on an assembled air cannon comprises: Assemble air cannon 9; Adjustable gun mount; the adjustable gun mount includes a gun mount frame, a slide rail, a plurality of clamps 5, a rotating seat, a limit clamp 7, and a mounting plate 8. The assembled air cannon 9 is clamped on the mounting plate 8 by a plurality of clamps 5. The assembled air cannon 9 is arranged along the length direction of the mounting plate 8. The gun mount frame includes a second cross beam 402. The rotating seat is installed on the second cross beam 402. The middle part of the mounting plate 8 is connected to the rotating part of the rotating seat. The slide rail is transversely installed on the gun mount frame. The slide rail is placed above the second cross beam 402. The slide rail is parallel to the second cross beam 402. The limit clamp 7 includes two limit sliders. The two limit sliders are parallel to each other and slidably installed in the slide rail. The upper part of the mounting plate 8 is placed between the two limit sliders. Water tank 3; water tank 3 is placed under the adjustable gun mount, the top of water tank 3 is open, a long hole is opened at the bottom of water tank 3, a rubber pad 304 is installed on the long hole, the long hole is parallel to the second cross beam 402, and the launch port of the assembled air cannon 9 is aligned with the long hole; the rubber pad 304 needs to be waterproofed after installation, and after each water immersion test causes the rubber pad 304 to be damaged, it is replaced with a new rubber pad 304 to achieve reuse.

[0030] like Figure 1 and 4 As shown, the gun mount frame is a rectangular frame structure composed of multiple gun mount columns 1, multiple cross columns, and multiple reinforcing ribs 2. The reinforcing ribs 2 are arranged at an angle, and the two ends of the reinforcing ribs 2 are respectively connected to two adjacent cross columns, adjacent gun mount columns 1, and cross columns. The adjustable gun mount is a supporting device for assembling the air cannon 9. The combination of multiple gun mount columns 1, multiple cross columns, and multiple reinforcing ribs 2 is used to ensure that the gun mount has sufficient structural strength. In addition, a third cross beam 401 (the first cross beam, the second cross beam, and the third cross beam together constitute the gun mount cross beam 4) is also provided below the second cross beam 402, which is also used to ensure that the gun mount has sufficient structural strength to withstand the weight of the assembled air cannon 9 and the recoil during the firing process.

[0031] like Figure 1 and 4 As shown, the rotating seat includes two mounting seats, a rotating shaft, and two rotating bearings 6. The second beams 402 are two parallel to each other. The two mounting seats are respectively mounted on the two second beams 402. The outer rings of the two rotating bearings 6 are respectively mounted on the two mounting seats. The two ends of the rotating shaft are respectively mounted in the inner rings of the two rotating bearings 6. The rotating shaft is perpendicular to the second beams 402, and the middle part of the rotating shaft is connected to the bottom of the mounting plate 8.

[0032] like Figure 1 and 4 As shown, the slide rail includes two first beams 403 parallel to each other, and a slide groove is provided in the opposite side of the two first beams 403. The slide groove is provided along the length direction of the first beam 403, and the two ends of the limit slider are respectively slidably placed in the slide grooves of the two first beams 403. The limit slider realizes the clamping and fixing of the mounting plate 8 and the assembled air cannon 9 at different tilt angles. During operation, the lengthwise position of the two limit sliders is adjusted in the slide groove as needed, and then the position is locked (the position of the limit slider in the slide groove can be locked by bolts), and the firing angle of the assembled air cannon 9 is fixed.

[0033] like Figure 2 As shown, the assembled air cannon 9 includes a high-pressure gas source 901, a gas pipeline 902, an air chamber 903, a firing valve 904, a loading compartment 905, and a gun barrel 907. The high-pressure gas source 901 is connected to a first end of the air chamber 903 through the gas pipeline 902, and a second end of the air chamber 903, the firing valve 904, the loading compartment 905, and the gun barrel 907 are connected in sequence, and a test bullet is placed in the loading compartment 905.

[0034] like Figure 3As shown, the ammunition loading bay 905 includes an ammunition bay 9051 and a sleeve 9052. The side wall of the ammunition bay 9051 is provided with a strip hole for placing the test ammunition. The sleeve 9052 is sleeved on the outer wall of the ammunition bay 9051 and is used to block the strip hole.

[0035] In some embodiments, an external thread is provided on the side wall of the first end of the bomb bay 9051, an internal thread is provided on the inner wall of the first end of the sleeve 9052, and the first end of the bomb bay 9051 is threadedly connected with the first end of the sleeve 9052.

[0036] like Figure 4-6 As shown, the water tank 3 includes a water tank frame, a water tank bottom plate 301, and four organic glass plates 307. The water tank frame is a rectangular parallelepiped frame structure composed of multiple water tank columns 306 and multiple water tank cross beams 302; the four organic glass plates 307 are installed on the side walls of the water tank frame (the organic glass plates 307 are fixed to the water tank columns 306 through a number of pressing plates 308), and the water tank bottom plate 301 is installed at the bottom of the water tank frame. The organic glass plates are fixed to the water tank columns through a number of pressing plates to form the side walls of the water tank, which is convenient for observing the water entry process. The setting of the organic glass plates 307 is convenient for observing the water entry process of the test projectile.

[0037] like Figure 6 As shown, the water tank 3 further includes an annular cover plate 303 , which is arranged around the long strip hole, and the edge of the rubber pad 304 is installed between the cover plate 303 and the water tank bottom plate 301 .

[0038] like Figure 5 As shown, the water tank 3 also includes a buffer pad 305, which is installed under the water tank bottom plate 301. The buffer pad 305 includes a buffer pad 305 frame and a buffer material. The buffer material is filled in the buffer pad 305 frame. The buffer material is sand, plasticine and other materials. After the water test bullet comes out of the water, it drills into the buffer material and is decelerated, thereby achieving buffering protection and recovery of the test bullet; the main function of the buffer pad 305 frame is to bear the weight of the water tank 3. After the test bullet comes out of the water, it drills into the buffer material to a certain depth and its speed drops to 0, thereby achieving protection and recovery of the test bullet.

[0039] The assembled air cannon 9 is a test loading device that fires test bullets based on compressed air within a certain speed range. Its maximum firing speed depends on the highest air pressure it can withstand and the mass of the test bullet. In the assembled air cannon 9: The high-pressure gas source 901 is used to store compressed air and control the gas pressure delivered to the gas chamber 903 ; the high-pressure gas source 901 can also be used to control the gas pressure of the gas chamber 903 .

[0040] The delivery pipeline is used to connect the high-pressure gas source 901 and the air chamber 903. It is a channel for the high-pressure gas source 901 to transmit high-pressure gas to the air chamber 903. It is used to transport the compressed air of the high-pressure gas source 901 to the air chamber 903. The delivery pipeline is made of high-pressure resistant and well-sealed materials, and the interface is sealed; the gas delivery pipeline 902 is connected to the high-pressure gas source 901 and the air chamber 903 through a threaded joint, and a built-in gasket is used to prevent gas leakage.

[0041] The air chamber 903 has a large volume and stores high-pressure gas at a certain pressure before the test. It is made of a material with good sealing and high-pressure resistance. The air chamber 903 is the power device of this embodiment. During the test, the internal compressed air is released and pushes the test bullet to accelerate along the barrel 907 until it is fired.

[0042] The launch valve 904 is used to release the high-pressure gas in the air chamber 903 to the test bullet. It is installed at the outlet of the air chamber 903 and is driven by electromagnetic force. The opening and closing state is remotely controlled to realize the release of the compressed air in the air chamber 903, that is, the launch function of the remotely controlled air cannon; The loading bay 905 is the assembly interface between the test projectile and the air cannon. During the test, the test projectile is loaded into the air cannon from the loading bay 905; the loading bay 905 is connected between the launch valve 904 and the gun barrel 907, and is used for assembling and fixing the water-entering test projectile. The loading bay 905 consists of a projectile bay 9051 and a sleeve 9052. The projectile bay 9051 is an open structure with strip holes on the side wall. The sleeve 9052 can slide along the side wall of the projectile bay 9051. During loading, the sleeve 9052 is slid to expose the strip holes in the projectile bay 9051, and the water-entering test projectile is placed in the strip holes in the projectile bay 9051. The sleeve 9052 is then slid back to its original position and covers the strip holes in the projectile bay 9051. The sleeve 9052 is connected to the projectile bay 9051 through a root thread, and an annular rubber pad 304 is provided at the root to enhance the sealing of the loading bay 9055.

[0043] The gun barrel 907 is used for accelerating and controlling the trajectory of the test projectile. When the air cannon is fired, the test projectile is accelerated along the gun barrel 907 and reaches the maximum speed when it reaches the muzzle. The gun barrel 907 is a cylinder with an inner diameter of 50 mm and is connected and sealed to the loading chamber 905 through a flange 906.

[0044] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A variable angle tilt water entry test device based on an assembled air cannon, characterized in that: include: Assemble the air cannon; Adjustable gun mount; the adjustable gun mount comprises a gun mount frame, a slide rail, a plurality of clamps, a rotating seat, a limit clamp, and a mounting plate. The assembled air cannon is clamped on the mounting plate by a plurality of clamps. The assembled air cannon is arranged along the length direction of the mounting plate. The gun mount frame comprises a second cross beam. The rotating seat is mounted on the second cross beam. The middle part of the mounting plate is connected to the rotating part of the rotating seat. The slide rail is transversely mounted on the gun mount frame. The slide rail is placed above the second cross beam. The slide rail is parallel to the second cross beam. The limit clamp comprises two limit sliders. The two limit sliders are parallel to each other and slidably mounted in the slide rail. The upper part of the mounting plate is placed between the two limit sliders. Water tank; the water tank is placed under the adjustable gun mount, the top of the water tank is open, a long hole is opened at the bottom of the water tank, a rubber pad is installed on the long hole, the long hole is parallel to the second beam, and the launch port of the assembled air cannon is aligned with the long hole.

2. A variable angle tilt water entry test device based on assembled air cannon according to claim 1, characterized in that: The gun mount frame is a rectangular frame structure composed of multiple gun mount columns, multiple cross columns, and multiple reinforcing ribs. The reinforcing ribs are arranged obliquely, and the two ends of the reinforcing ribs are respectively connected to two adjacent cross columns, adjacent gun mount columns and cross columns.

3. A variable angle tilt water entry test device based on assembled air cannon according to claim 1, characterized in that: The rotating seat includes two mounting seats, a rotating shaft, and two rotating bearings. The second beams are two parallel to each other. The two mounting seats are respectively mounted on the two second beams. The outer rings of the two rotating bearings are respectively mounted on the two mounting seats. The two ends of the rotating shaft are respectively mounted in the inner rings of the two rotating bearings. The rotating shaft is perpendicular to the second beams, and the middle part of the rotating shaft is connected to the bottom of the mounting plate.

4. The variable angle tilt water entry test device based on assembled air cannon according to claim 1, characterized in that: The slide rail includes two mutually parallel first beams, and slide grooves are arranged in opposite sides of the two first beams. The slide grooves are arranged along the length direction of the first beams, and the two ends of the limit slider can be slidably placed in the slide grooves of the two first beams.

5. The variable angle tilt water entry test device based on assembled air cannon according to claim 1, characterized in that: The assembled air cannon includes a high-pressure gas source, a gas pipeline, an air chamber, a firing valve, a loading compartment, and a gun barrel. The high-pressure gas source is connected to a first end of the air chamber through a gas pipeline, and a second end of the air chamber, a firing valve, a loading compartment, and a gun barrel are connected in sequence. A test bomb is placed in the loading compartment.

6. A variable angle tilt water entry test device based on assembled air cannon according to claim 5, characterized in that: The loading bay comprises a bay and a sleeve. A strip hole for placing test bullets is arranged on the side wall of the bay. The sleeve is sleeved on the outer wall of the bay and is used to block the strip hole.

7. A variable angle tilt water entry test device based on assembled air cannon according to claim 6, characterized in that: An external thread is arranged on the side wall of the first end of the bomb bay, an internal thread is arranged on the inner wall of the first end of the sleeve, and the first end of the bomb bay is threadedly connected with the first end of the sleeve.

8. The variable angle tilt water entry test device based on assembled air cannon according to claim 1, characterized in that: The water tank comprises a water tank frame, a water tank bottom plate and four organic glass plates. The water tank frame is a rectangular frame structure composed of multiple water tank columns and multiple water tank beams. The four organic glass plates are installed on the side walls of the water tank frame, and the water tank bottom plate is installed at the bottom of the water tank frame.

9. The variable angle tilt water entry test device based on assembled air cannon according to claim 8, characterized in that: The water tank also includes an annular cover plate, which is arranged around the long strip hole, and the edge of the rubber pad is installed between the cover plate and the bottom plate of the water tank.

10. The variable angle tilt water entry test device based on assembled air cannon according to claim 8, characterized in that: The water tank also includes a buffer pad, which is installed below the bottom plate of the water tank. The buffer pad includes a buffer pad frame and buffer material, and the buffer material is filled in the buffer pad frame.

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