Integral suspension type vibration isolation and noise reduction device for light-gas gun and mounting method of integral suspension type vibration isolation and noise reduction device

Abstract

The invention discloses a light-gas gun integral suspension type vibration isolation and noise reduction device and a mounting method thereof, and relates to the technical field of vibration isolation and noise reduction. According to the method, a base is included, a groove body is formed in the base, and a water medium is contained in the groove body; the bearing platform is arranged in the tank body and is suspended on the water medium; the bearing platform is of a box structure, and a sound insulation cover covers the bearing platform. The interior of the bearing platform is used for mounting a light-gas gun; and the bearing platform is elastically connected with the groove body. Through the fluid characteristics of water and the vibration isolation effect of elastic connection, under the condition that the normal working process of the light-gas gun is not affected, the impact load and noise of working of the light-gas gun are integrally reduced.

Description

Technical Field

[0001] The invention relates to the technical field of vibration isolation and noise reduction, and in particular to a light gas gun integrally suspended vibration isolation and noise reduction device and an installation method thereof. Background Art

[0002] Light gas guns are one of the most widely used technologies in the field of laboratory hypervelocity launchers. When working, they will have a strong impact on the foundation due to factors such as propellant detonation, high-pressure gas release (pressure can reach tens of GPa), and high-speed impact of projectiles (maximum speed can reach 10km / s), causing the factory to vibrate violently and forming huge instantaneous air noise. Considering that light gas guns are currently mainly deployed in relevant universities, research institutes and high-tech enterprises, which are located in densely populated areas and have high requirements for environmental noise, and considering the impact of multiple impact experiments on the safety of the factory, it is necessary to effectively reduce the impact of light gas guns on the foundation and reduce air noise when working. Summary of the invention

[0003] In view of the shortcomings of the above-mentioned background technology, the present invention provides a light gas gun integral suspension type vibration isolation and noise reduction device. This method uses the fluid properties of water and the vibration isolation effect of elastic connection to integrally attenuate the impact load and noise of the light gas gun without affecting the normal working process of the light gas gun.

[0004] The first object of the present invention is to provide a light gas gun integral suspension type vibration isolation and noise reduction device for vibration isolation and noise reduction of the light gas gun, comprising: A base having a trough body formed thereon, wherein the trough body contains a water medium; A carrying platform is arranged in the tank body and suspended on the water medium; The bearing platform is a box structure, and its upper cover is provided with a soundproof cover; the interior of the bearing platform is used to install a light gas gun; The bearing platform is elastically connected to the trough body.

[0005] Preferably, the upper end of the carrying platform is exposed outside the tank body under the action of the water medium, and the carrying platform is exposed outside the top of the tank body, and the outer sides of the top are connected with a horizontal plate body, and the plate body extends to the edge of the tank body; A plurality of air springs are arranged at equal intervals between the plate body and the edge of the trough body around the bearing platform.

[0006] Preferably, each of the air springs is composed of two mounting end surfaces, an air bag between the two mounting end surfaces, and a limiter inside the air bag.

[0007] Preferably, an air spring is also provided between the side of the bearing platform and the inner wall of the tank body; one end of the air spring is connected to the inner wall of the tank body, and the other end is connected to the side of the bearing platform; Wherein, a vertical guide rail is arranged on the side of the bearing platform at the connection with the air spring, a slider is arranged on the guide rail, and the end of the air spring is connected to the slider.

[0008] Preferably, the soundproof cover is a semi-cylindrical shell, which is covered on the top of the bearing platform; The soundproof cover is provided with sound absorbing material.

[0009] Preferably, the soundproof cover is made of an alloy frame and fire-resistant plastic arranged on the alloy frame.

[0010] Preferably, the size of the trough body matches the size of the carrying platform.

[0011] Preferably, the bearing platform is made of a plate member with reinforcing ribs.

[0012] Preferably, the base is a foundation.

[0013] The second object of the present invention is to provide a method for installing a light gas gun integral suspension type vibration isolation and noise reduction device, which is characterized by comprising: The air spring is arranged on the edge of the tank; The bearing platform is suspended on the water medium of the tank, and the plates arranged around it are mounted on the air springs; The light gas gun is fixed to the inner bottom of the carrying platform; The lower edge surface of the sound insulation cover and the upper edge surface of the bearing platform are fixed by bolts.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a light gas gun integral suspension type vibration isolation and noise reduction device. The present invention suspends a bearing platform provided with the light gas gun in a tank containing a water medium, so that the sound is transmitted across the medium and attenuated. The device combines the working principle of the light gas gun, makes full use of the fluid characteristics, the attenuation characteristics when the impact load is transmitted across the medium, and the vibration isolation effect of the elastic connection, has a simple structure, high reliability, and good economy, can achieve vibration reduction and noise reduction when the light gas gun is working, and reduce the impact of the impact load of the light gas gun on the factory building and the environment.

[0015] The present invention specifically suspends the bearing platform inside the foundation through the buoyancy of the water medium, and ensures the stability of the bearing platform through air springs arranged in multiple directions; the air springs installed on the bearing platform can be located in the guide rail and move to a certain extent according to the floating or sinking displacement. When the light gas gun is working, it mainly generates a huge impact load along the X direction, which can be attenuated by the fluid resistance of the water and the air spring installed on the top surface of the bearing platform. At the same time, the water medium can absorb the noise generated by the impact to a certain extent; the closed body formed by the soundproof cover and the bearing platform can effectively block the impact noise. In addition, since the entire bearing platform is a sinking type, water can be injected inside to realize the motion characteristics experiment of high-speed projectiles in the water medium; when the driving gas of the light gas gun is a flammable and explosive gas such as hydrogen, the closed body formed by the soundproof cover and the bearing platform can be evacuated, and the experimental environment under a certain vacuum degree can ensure the safety of hydrogen operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the overall structure diagram of the light gas gun integral suspension type vibration isolation and noise reduction device; Figure 2 This is a cross-sectional view of the overall structure of the light gas gun integral suspension type vibration isolation and noise reduction device; Figure 3 It is the foundation structure diagram; Figure 4 It is the structure diagram of air spring; Figure 5 This is the structural diagram of the load-bearing platform; Figure 6 This is the structural diagram of the soundproof cover; Figure 7 This is the installation structure diagram of the air spring and foundation. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand and implement the technical solution of the present invention, the present invention is further described below in conjunction with specific embodiments and drawings, but the embodiments are not intended to limit the present invention.

[0018] The purpose of the present invention is to provide an integrally suspended vibration isolation and noise reduction device for a light gas gun, which mainly uses the fluid properties of water in combination with the vibration isolation effect of an air spring to integrally attenuate the impact load and noise of the light gas gun without affecting the normal working process of the light gas gun.

[0019] Based on the characteristics of the impact load of the light gas gun of the laboratory ultra-high-speed launch device during operation, the present invention proposes a structure in which the light gas gun guide rail is connected to an integral floating bearing platform and then suspended in a water medium, which effectively reduces the impact of the light gas gun on the ground during operation, reduces the noise during operation of the light gas gun, and reduces the impact of the impact load of the light gas gun on the factory building and the environment. The device provided by the present invention can expand the application scenarios of the light gas gun, that is, to realize ultra-high-speed launch experiments in water media; at the same time, since a closed body is formed in the structure, the entire device can be operated in a certain vacuum environment, thereby improving the safety of the light gas gun.

[0020] See also Figures 1 to 7 As shown, a light gas gun integral suspension type vibration isolation and noise reduction device is used for vibration isolation and noise reduction of the light gas gun, comprising a base 1, a bearing platform 3, a soundproof cover 4 and a water medium 6; The base 1 is provided with a trough body, in which a water medium 6 is contained; the bearing platform 3 is arranged in the trough body and suspended on the water medium 6; the bearing platform 3 is a box structure, and its upper cover is provided with a soundproof cover 4; the inside of the bearing platform 3 is used to install a light gas gun 5; the bearing platform 3 is elastically connected to the trough body. In the actual experiment process, the foundation is directly used as the base for placing the bearing platform, and the base 1 is defined as the foundation.

[0021] To this end, the present invention passes a water medium between the bearing platform and the foundation to attenuate the sound propagation across the medium. This method abandons the structure of the traditional light gas gun directly connected to the foundation through a guide rail, and proposes that the light gas gun guide rail is connected to the integral bearing platform and then suspended in the water medium, which effectively reduces the impact of the light gas gun on the ground when it is working and reduces the noise when the light gas gun is working.

[0022] In order to improve the elastic connection between the bearing platform and the foundation and reduce the noise of the light gas gun when working, when the upper end of the bearing platform 3 is exposed outside the tank under the action of the water medium, the bearing platform 3 is exposed outside the tank, and the top of the top is connected to the outside of the top with a horizontal plate body, which extends to the edge of the tank body; multiple air springs 2 are arranged at equal intervals between the plate body around the bearing platform 3 and the edge of the tank body. It should be noted that, see Figure 7 The air spring and foundation installation structure diagram shown in the figure also has an air spring arranged between the side of the bearing platform 3 and the inner wall of the tank body. To this end, the bearing platform and the foundation are connected by multiple air springs, realizing an elastic connection and improving the stability between the bearing platform and the foundation.

[0023] Specifically, an air spring is also provided between the side of the bearing platform 3 and the inner wall of the tank body; one end of the air spring is connected to the inner wall of the tank body, and the other end is connected to the side of the bearing platform 3; A vertical guide rail is provided on the side of the bearing platform 3 at the connection with the air spring, a slider is provided on the guide rail, and the end of the air spring is connected to the slider.

[0024] To this end, an air spring is also arranged between the side of the supporting platform 3 and the inner wall of the trough body. The end of the air spring moves up and down in the guide rail as the supporting platform moves, so that the slider moves in the guide rail. That is, the air spring installed on the side of the supporting platform 3 can move to a certain extent in the guide rail according to the upward or downward displacement, and further improves the stability between the supporting platform and the foundation.

[0025] The present invention combines the working principle of the light gas gun, fully utilizes the fluid characteristics, the attenuation characteristics when the impact load propagates across the medium, and the vibration isolation effect of the air spring, has a simple structure, high reliability, and good economy, can achieve vibration reduction and noise reduction when the light gas gun is working, and reduce the impact of the impact load of the light gas gun on the factory building and the environment.

[0026] Each air spring 2 is composed of two mounting end faces, an air bag between the two mounting end faces, and a stopper inside the air bag. The selection of the air spring is determined according to the bearing weight and the impact load.

[0027] The soundproof cover 4 is a semi-cylindrical shell, which is covered on the top of the bearing platform 3; sound absorbing material is attached to the soundproof cover 4. The soundproof cover 4 is made of an alloy frame and fire-resistant plastic arranged on the alloy frame. The closed body formed by the soundproof cover and the bearing platform can effectively block impact noise.

[0028] The size of the trough body matches the size of the carrying platform 3 .

[0029] The carrying platform 3 is made of a plate member with reinforcing ribs.

[0030] The light gas gun integral suspension type vibration isolation and noise reduction device provided by the present invention is mainly aimed at the structural design and vibration isolation and noise reduction design, which are specifically as follows.

[0031] Structural design: Design a box-type load-bearing platform, in which the light gas gun can be installed as a whole. The platform is composed of plate components with reinforcing ribs to ensure strength and rigidity; dig the ground to form a pool, the size of which matches the load-bearing platform; design a load-bearing platform cover of a semi-cylindrical shell, the size of which matches the load-bearing platform, the cover and the load-bearing platform can be tightly connected by bolts, the cover can be attached with sound-absorbing material, the density should be small, and it is easy to hoist.

[0032] Vibration isolation and noise reduction design: The platform and its cover adopt an integrated vibration isolation and noise reduction design. The platform is suspended in the water pool to attenuate the sound through the medium transmission; the stability of the platform in the water is guaranteed by air springs, while attenuating the vibration transmission between the platform and the foundation; the cover attenuates the noise transmitted by the light gas gun through the air.

[0033] In the present invention, the air spring is selected from shelf products, which are easy to purchase, and its stiffness focuses on the stability of the entire structure, which is mainly affected by the variable loads generated by the staff themselves; the bearing platform material is selected from ordinary steel, and the processing accuracy requirement is not high; the sound insulation cover is selected from an alloy frame with refractory plastic, which is easy to process and ensures that the weight is light.

[0034] The present invention provides an installation method of a light gas gun integral suspension type vibration isolation and noise reduction device, comprising: The air spring is arranged on the edge of the tank; The bearing platform 3 is suspended on the water medium of the tank, and the plates arranged around it are mounted on the air springs; The light gas cannon 5 is fixed to the inner bottom of the carrying platform 3; The lower edge surface of the soundproof cover 4 and the upper edge surface of the bearing platform 3 are fixed by bolts.

[0035] In order to further illustrate the light gas gun integral suspension type vibration isolation and noise reduction device provided by the present invention, it is described again in conjunction with the accompanying drawings.

[0036] The overall structure of the device provided by the present invention is shown in Figure 1 As shown, the cross section at the midpoint A along the X direction is shown in Figure 2 As shown, 1 is the foundation, 2 is the air spring, 3 is the bearing platform, 4 is the soundproof cover, 5 is the light gas cannon, and 6 is the water medium.

[0037] See also Figure 3 As shown, the foundation 1 is formed by digging a rectangular parallelepiped on the ground according to the size of the light gas gun, and the figure shows the upper edge (parallel to the XOY plane), the inner side surface (parallel to the XOZ plane, two side surfaces), and the inner top (parallel to the YOZ plane, two end surfaces).

[0038] See also Figure 4 As shown, the air spring 2 is mainly composed of two mounting end surfaces, a middle air bag and an internal stopper. The selection of the air spring is determined according to the bearing weight and impact load.

[0039] See also Figure 5 As shown, the shape of the carrying platform 3 is similar to a rectangular hat, and guide rails are arranged on the two end surfaces.

[0040] See also Figure 6 As shown, the soundproof cover 4 is shaped like a semi-cylindrical hat.

[0041] The light gas gun 5 is mainly composed of an air chamber, a gun barrel, a target chamber, a support, etc.

[0042] Installation process of the light gas gun integral suspension vibration isolation and noise reduction device: overall installation, see Figure 1 and Figure 2 As shown. (1) The air spring 2 is installed on the upper edge of the foundation 1, evenly distributed along the X and Y directions, and the other end is installed on the lower edge of the bearing platform. (2) The air spring 2 is installed on the inner top surface of the foundation 1, according to the 2×2 layout, 4 are installed on each inner top surface, and the other end of the air spring is installed in the guide rail of the bearing platform 3. (3) The lower edge of the soundproof cover 4 and the upper edge of the bearing platform 3 are fixed by bolts. In order to ensure air tightness, a rubber pad needs to be arranged between the two installation surfaces. (4) The light gas cannon 5 is fixed to the inner bottom surface of the bearing platform 3.

[0043] The bearing platform 3 is suspended inside the foundation 1 by the buoyancy of the water medium 6, and the stability of the bearing platform 3 is ensured by the air springs 2 arranged in multiple directions; the air springs installed on the bearing platform 3 can be located in the guide rail and move to a certain extent according to the floating or sinking displacement. When the light gas gun is working, it mainly generates a huge impact load along the X direction, which can be attenuated by the fluid resistance of the water and the air spring installed on the top surface of the bearing platform. At the same time, the water medium can absorb the noise generated by the impact to a certain extent; the closed body formed by the soundproof cover and the bearing platform can effectively block the impact noise. In addition, since the entire bearing platform is a sinking type, water can be injected inside to realize the motion characteristics experiment of high-speed projectiles in the water medium; when the driving gas of the light gas gun is a flammable and explosive gas such as hydrogen, the closed body formed by the soundproof cover and the bearing platform can be evacuated, and the experimental environment under a certain vacuum degree can ensure the safety of hydrogen operation.

[0044] When the light gas gun is working, after analysis and calculation, when the 1kg piston is accelerated to 300m / s, the transient impact force peak generated in the cone entry process can reach 500kN. Combined with experimental data, a peak axial impact force of about 70kN can be caused to the foundation; through the vibration isolation provided by the present invention and the fluid resistance of water, the impact force peak attenuation of 1 to 2 orders of magnitude can be achieved, which further illustrates that the device provided by the present invention achieves vibration reduction and noise reduction when the light gas gun is working, and reduces the impact of the impact load of the light gas gun on the factory building and the environment.

[0045] The present invention describes preferred embodiments and their effects. However, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A light gas gun integral suspension type vibration isolation and noise reduction device, characterized in that: Vibration and noise isolation for light gas guns, including: A base having a trough body formed thereon, wherein the trough body contains a water medium; A carrying platform is arranged in the tank body and suspended on the water medium; The bearing platform is a box structure, and its upper cover is provided with a soundproof cover; the interior of the bearing platform is used to install a light gas gun; The bearing platform is elastically connected to the trough body.

2. The light gas gun integral suspension type vibration isolation and noise reduction device according to claim 1 is characterized in that: The upper end of the carrying platform is exposed from the tank body under the action of the water medium, and the carrying platform is exposed from the top of the tank body. The top is connected to the outside with a horizontal plate body, and the plate body extends to the edge of the tank body. A plurality of air springs are arranged at equal intervals between the plate body and the edge of the trough body around the bearing platform.

3. The light gas gun integral suspension type vibration isolation and noise reduction device according to claim 2 is characterized in that: Each of the air springs is composed of two mounting end surfaces, an air bag between the two mounting end surfaces, and a limiter inside the air bag.

4. The light gas gun integral suspension type vibration isolation and noise reduction device according to claim 2 is characterized in that: An air spring is also provided between the side of the bearing platform and the inner wall of the tank body; one end of the air spring is connected to the inner wall of the tank body, and the other end is connected to the side of the bearing platform; Wherein, a vertical guide rail is arranged on the side of the bearing platform at the connection with the air spring, a slider is arranged on the guide rail, and the end of the air spring is connected to the slider.

5. The light gas gun integral suspension type vibration isolation and noise reduction device according to claim 1 is characterized in that: The soundproof cover is a semi-cylindrical shell, which is covered on the top of the bearing platform; The soundproof cover is provided with sound absorbing material.

6. The light gas gun integral suspension type vibration isolation and noise reduction device according to claim 5 is characterized in that: The soundproof cover is made of an alloy frame and fire-resistant plastic arranged on the alloy frame.

7. The light gas gun integral suspension type vibration isolation and noise reduction device according to claim 1 is characterized in that: The size of the trough body matches the size of the carrying platform.

8. The light gas gun integral suspension type vibration isolation and noise reduction device according to claim 1 is characterized in that: The bearing platform is made of a plate component with reinforcing ribs.

9. The light gas gun integral suspension type vibration isolation and noise reduction device according to claim 1 is characterized in that: The base is a foundation.

10. A method for installing the light gas gun integral suspension type vibration isolation and noise reduction device according to claim 2, characterized in that: include: The air spring is arranged on the edge of the tank; The bearing platform is suspended on the water medium of the tank, and the plates arranged around it are mounted on the air springs; The light gas gun is fixed to the inner bottom of the carrying platform; The lower edge surface of the sound insulation cover and the upper edge surface of the bearing platform are fixed by bolts.

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