An anti-vibration device for reducing self-vibration of an acoustic detection module

Abstract

The present invention discloses a vibration isolation device for reducing the self-vibration of an acoustic detection module, belonging to the technical field of vibration reduction and noise reduction of metamaterials. The device includes a connecting flange, a transition flange, a vibration isolation body, a limiting flange and a plug-in flange; one side of the transition flange is fixedly connected to the connecting flange, the sides of the transition flange and the plug-in flange with grooves are arranged opposite to each other, and both ends of the vibration isolation body are respectively embedded in and fixed to the grooves of the transition flange and the plug-in flange, and a spacing is left between the lower end surface of the transition flange and the upper end surface of the plug-in flange; one end of the limiting flange with an external thread is fixedly connected to the plug-in flange by a thread, and the other end of the limiting flange is located in the annular space formed by the connecting flange and the transition flange, so that there are radial limiting and axial limiting gaps between the limiting flange and the connecting flange and the transition flange. The present invention can achieve uniform vibration reduction and isolation effects, and at the same time can maintain a low manufacturing cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of metamaterial vibration damping and noise reduction, and particularly relates to a vibration isolation device for reducing the self-vibration of an acoustic detection module. Background Art

[0002] Currently, when facing underwater detection, due to the strong anti-interference ability, high stability, and simple detection device of sound waves, sound waves are often used for detection. When sound waves are used for underwater detection, they are seriously affected by external conditions. The more direct factors include propagation attenuation, multi-path effect, reverberation interference, ocean noise, self-noise, target reflection characteristics, or radiation noise intensity, etc. How to reduce or eliminate the influence of these factors on sonar has become a major key. Therefore, a vibration isolation device is used to reduce the interference received by the acoustic detection module, and the amplitude of the isolated object depends on the excitation amplitude, frequency ratio, damping ratio, and inert mass ratio, etc. Currently, there are a wide variety of vibration isolators, starting from the metal rubber vibration isolator, rubber vibration isolator, and spring vibration isolator designed based on the principle of damping vibration reduction, to the vibration isolator with various composite structures, the new type of vibration isolator that combines a shock absorber and a vibration isolator, and the main-passive combined vibration isolator composed of a combination of various types of vibration isolators.

[0003] A typical rubber vibration isolator is as shown in the appendix Figure 1 Between the first flange, the second flange, and the lower connecting plate, a rubber body is filled. A rubber sleeve is arranged at the axis of the rubber body, and a core column is arranged inside the rubber sleeve. A cavity and a metal plate are arranged between the second flange and the rubber sleeve. Thus, the vibration isolator has the function of vibration isolation and can also be used for shock isolation and bear loads in multiple directions.

[0004] The defects of such rubber vibration isolators are as follows:

[0005] First, the vibration damping and isolation of the rubber vibration isolator rely on the rubber body and the middle cavity, and there is a lack of buffering during the vibration isolation process. Therefore, the vibration isolator cannot achieve uniform vibration damping and isolation.

[0006] Second, the vibration isolator requires many and miscellaneous parts, cannot be well standardized, and has a high cost. Summary of the Invention

[0007] In view of this, the present invention provides a vibration isolation device for reducing the self-vibration of an acoustic detection module, which can achieve uniform vibration damping and isolation effects and maintain a low manufacturing cost at the same time.

[0008] A vibration isolation device for reducing the self-vibration of an acoustic detection module includes a connecting flange, a transition flange, a vibration isolation body, a limiting flange, and a plug-in flange;

[0009] On the end faces of one side of the transition flange and the insertion flange, there are grooves that fit the vibration isolator. On the side of the insertion flange with the groove, there are screw holes and connection holes.

[0010] One end of the limit flange has an external thread that mates with the threaded connection hole of the insertion flange.

[0011] One side of the transition flange is fixedly connected to the connection flange. The sides of the transition flange and the insertion flange with grooves are arranged opposite to each other. The two ends of the vibration isolator are respectively embedded and fixed in the grooves of the transition flange and the insertion flange. There is a gap between the lower end face of the transition flange and the upper end face of the insertion flange. The end of the limit flange with the external thread is fixedly connected to the insertion flange by threads. The other end of the limit flange is located in the annular space formed by the connection flange and the transition flange, so that there are radial limit and axial limit gaps between the limit flange and the connection flange and the transition flange.

[0012] Further, the connection flange is of a circular ring structure. The two ends of the circular ring structure extend horizontally along the radial direction to form connection parts, and through holes are processed on the connection parts. Ten through holes are processed on the circular ring structure along the circumferential direction, and the angle between every two adjacent holes is 36°.

[0013] Further, the transition flange is of a circular ring structure. Threaded holes for mating connection with the connection flange are processed on one side end face, grooves that fit the vibration isolator are processed on the other side end face, there are through holes at the bottom of the grooves, and a convex edge extends along the radial direction at the inner ring of this side end face.

[0014] Further, the vibration isolator is a middle hollow structure processed from metamaterial. There are two symmetric blind pin holes at both the upper and lower ends of the vibration isolator, and screw sleeves are installed in the blind pin holes.

[0015] Further, the limit flange is of a cylindrical structure. An external thread for connection with the insertion flange is processed at one end, and a convex edge extends along the radial direction on the outer circumferential surface of the other end. A plurality of uniformly distributed through holes are processed on the outer circumferential surface of the limit flange.

[0016] Further, internal threads for mating with the limit flange are processed in the inner hole of the insertion flange, and grooves that fit the vibration isolator are processed on the end face of the insertion flange, and there are through holes at the bottom of the grooves.

[0017] Further, the connection flange, the transition flange, the limit flange, and the insertion flange are processed from 6061 - T6 alloy material.

[0018] Beneficial effects:

[0019] 1. The vibration isolation device of the present invention includes a connecting flange, a transition flange, a vibration isolation body, a limiting flange, and a plug-in flange. The acoustic detection module is connected to the connecting flange. The connecting flange is bolted to the transition flange. The transition flange and the plug-in flange are connected through the vibration isolation body. The vibration isolation body connects the transition flange and the plug-in flange in series through a screw sleeve. The limiting flange is connected to the plug-in flange through surface threads. There are radial and axial limiting gaps between the limiting flange and the connecting flange, enhancing the safety of use of the vibration isolation device while achieving uniform vibration reduction and isolation effects. The vibration isolation body uses mature rubber material such as polyurethane to achieve damping vibration reduction, obtaining relatively good vibration isolation performance while ensuring relatively low cost.

[0020] 2. The connecting flange of the present invention has an annular structure. Horizontal connecting parts extend radially from both ends of the annular structure, and through holes are machined on the connecting parts. Ten through holes are machined circumferentially on the annular structure, and the angle between every two adjacent holes is 36°, which helps to reduce displacement, temporarily store kinetic energy, reduce deformation, thereby increasing safety and reducing vibration.

[0021] 3. The transition flange of the present invention has an annular structure. Threaded holes for mating connection with the connecting flange are machined on one side end face, and grooves that fit the vibration isolation body are machined on the other side end face. There are through holes at the bottom of the grooves, and these through holes are aligned with the pin holes of the vibration isolation body, enabling the vibration isolation body to be fixed on the transition flange, ensuring the stability and safety of the vibration isolator itself.

[0022] 4. The vibration isolation body of the present invention adopts a structure with a hollow middle. The internal void design not only improves material utilization rate, reduces the mass of the device, but also ensures the safety of the device with a large deformation margin. There are two symmetrical blind pin holes at both the upper and lower ends of the vibration isolation body, one of which cooperates with the screw sleeve, enabling the vibration isolation body to be connected to the transition flange and the plug-in flange. The screw sleeve ensures stable cooperation between the vibration isolation body and the flange.

[0023] 5. One side of the limiting flange of the present invention is connected to the plug-in flange through surface threads, thus playing a role in stabilizing vibration reduction. It not only restricts the plug-in flange and fixes it, but also the circumference of the other side fits the transition flange, thus ensuring its own stability. Thereby, the safety of the device itself is increased. A plurality of uniformly distributed through holes are machined on the outer circumferential surface of the limiting flange, and the size diameter of each hole is the same, uniformly distributed on the circumference, also playing a buffering role, increasing material utilization rate and saving certain costs.

[0024] 6. The present invention is coaxially arranged with the acoustic detection module, with a compact structure, high space utilization rate, and more space-saving. In addition, the present invention also has the advantages of high safety, low cost, wide versatility, simple mechanism, mature part manufacturing technology, easy standardization, and convenient replacement. Description of the Drawings

[0025] Figure 1 is a schematic structural view of a rubber shock absorber in the prior art;

[0026] Figure 2 is a schematic overall structural view of the vibration isolation device of the present invention;

[0027] Figure 3 is Figure 2 central sectional view of;

[0028] Figure 4 is a three-dimensional structural view of the connecting flange;

[0029] Figure 5 is a three-dimensional structural view of the transition flange;

[0030] Figure 6 is a three-dimensional structural view of the vibration isolation body;

[0031] Figure 7 is a three-dimensional structural view of the limit flange;

[0032] Figure 8 is a three-dimensional structural view of the plug-in flange.

[0033] Among them, 1 - connecting flange, 2 - transition flange, 3 - vibration isolation body, 4 - limit flange, 5 - plug-in flange, 6 - screw sleeve. Specific embodiments

[0034] The present invention will be described in detail below with reference to the accompanying drawings and by way of examples.

[0035] The present invention provides a vibration isolation device for reducing the self-vibration of an acoustic detection module. As shown in the attached Figure 2 and 3 figures, the vibration isolation device includes a connecting flange 1, a transition flange 2, a vibration isolation body 3, a limit flange 4 and a plug-in flange 5; the connecting flange 1, the transition flange 2, the vibration isolation body 3 and the transition flange are sequentially connected in order, and the limit flange 4 is wrapped around the axis center by four vibration isolation bodies and is connected to the transition flange 2 and the plug-in flange 5.

[0036] As shown in the attached Figure 4 figure, the connecting flange 1 is integrally made of 6061-T6 alloy material. This alloy material has high strength, good uniformity, good earthquake resistance and impact resistance. Its main body is a circular ring structure. At both ends of the circular ring structure, a plurality of "arm"-like connecting parts extend radially. The longer ones are responsible for fixing the acoustic detection module, and the shorter ones are responsible for bolt connection with the transition flange 2. The holes on the connecting parts are the places for connection and fixation, and ten holes are evenly dug in the middle part of the circular ring structure, and the included angle between every two adjacent holes is 36°.

[0037] As shown in the attachedFigure 5 As shown in the figure, the transition flange 2 is of an annular structure. One side of it is bolt-connected to the connecting flange through four threaded holes at a 45° angle to the slot holes on this side, so as to cooperate and connect with the connecting flange. On the other side, there are four grooves that fit the vibration isolator, enabling the pin holes of the vibration isolator to be aligned, and at the same time enabling the vibration isolator 3 to be fixed on the transition flange 2. A convex edge extends radially along the inner ring of the end face on this side.

[0038] As attached Figure 6 As shown in the figure, the vibration isolator 3 relies on the properties of rubber materials for damping and vibration reduction. A metamaterial such as polyurethane is used to obtain better vibration reduction performance, and it adopts a hollow structure in the middle. The internal void design not only improves the material utilization rate, reduces the mass of the device, but also ensures the safety of the device with a large deformation margin. There are two symmetric blind pin holes on both the head and tail sides of the vibration isolator. The blind pin holes cooperate with the screw sleeve 6, so that the vibration isolator 3 can be connected to the transition flange 2 and the plug-in flange 5.

[0039] As attached Figure 7 As shown in the figure, one side of the limit flange 4 is connected to the plug-in flange through surface threads, so as to play a role in stabilizing vibration reduction, which not only restricts the plug-in flange and makes it fixed, and on the outer circumferential surface of the other side, a convex edge extends radially. This convex edge is axially fitted with the convex edge on the transition flange 2, thus ensuring its own stability. Thereby, the safety of the device itself is increased. Four holes are machined on its outer circumferential surface, and the size and diameter of each hole are the same and evenly distributed.

[0040] As attached Figure 8 As shown in the figure, the structure of the plug-in flange 5 is somewhat similar to the component composed of the connecting flange 1 and the transition flange 2. On one side, like the transition flange, there are four grooves that fit the vibration isolator, and the slot holes are drilled through to be responsible for connecting with the vibration isolator 3; on the other side, slot holes are also dug to limit displacement, prevent excessive deformation, reduce vibration, and there are two small threaded holes at positions perpendicular to these two slot holes for plugging.

[0041] There is a drilling hole on each of the four shorter connecting parts of the connecting flange 1. Align these four drilling holes with the four drilling holes on the side of the transition flange 2 with the smaller circle, and then connect and fix them with bolts. On the side of the transition flange with the larger circumference, it is matched with the vibration isolator 3 through four grooves that fit the shape of the vibration isolator. At this time, the blind pin holes of the vibration isolator 3 are coaxial with the through holes of the same size as the blind pin holes of the vibration isolator in the grooves, and then it is connected with the vibration isolator 3 with bolts to be fixed. Again, directly align the grooves on the side of the plug-in flange 5 with four grooves that fit the shape of the vibration isolator with the four fixed vibration isolators 3, then fit them, and then connect and fix the plug-in flange 5 with the vibration isolator 3 from the other side of the plug-in flange 5 through the drilling holes on it with bolts. Finally, the limiting flange 4 is connected to the plug-in flange 5 through the surface thread on one side, and the other side of the limiting flange should face the connecting flange 1, and it should be noted that there are radial limiting and axial limiting gaps between the limiting flange and the connecting flange. The length and width of each part should be well grasped. For example, the axial length of the connecting flange is 23.66 mm, the axial length of the transition flange is 11 mm, the axial length of the vibration isolator is 26.98 mm, the effective thread length of the limiting flange 4 is greater than 5 mm, and the total axial length is 32 mm, so as to achieve the axial limiting gap. Radially, the diameter of the large circle of the limiting flange is 41 mm, and the radial diameters of the circles of the transition flange 2 are 37 mm, 45 mm, and 48 mm, and the diameter of the circle increases along the axis, and the radial circle diameter of the joint surface between the connecting flange 1 and the transition flange 2 is 37 mm, so as to achieve the radial limiting gap. There are screw sleeves 6 in the four blind pin holes of each vibration isolator 3, which are matched to enable the vibration isolator to be connected with the transition flange 2 and the plug-in flange 5.

[0042] The vibration damping principle of the present invention is as follows: The connecting flange 1 is connected to the acoustic detection module. Since the connecting flange 1 is rigidly connected to the transition flange 2 by bolts and they move in the same way, forming a component, the self-vibration of the acoustic detection module will be directly transmitted to the transition flange 2. At the moment before the transition flange 2 vibrates, the vibration isolator is in an initial non-deformed state; further, at the moment when the vibration reaches, the spatial position of the transition flange changes. However, since there is no direct connection between the transition flange and the plug-in flange, the plug-in flange remains stable, the transition flange presses the vibration isolator and causes it to undergo elastic deformation, and at this time, a large amount of vibration energy is released; furthermore, the deformation continues, and the vibration isolator with a large deformation amount will be pressed into the preset deformation groove of the vibration isolation device, effectively ensuring the stability of the plug-in flange. At this time, the internal structure of the vibration isolator 3 isolates most of the vibration frequencies of the power module. Even further, the gap reserved between the transition flange and the plug-in flange provides a large margin for the deformation of the vibration isolator, ensuring the safety of the device; finally, the vibration of a small amount of unisolated frequencies and some vibrations with too large amplitudes that cause the vibration isolator to be compressed to the limit are finally transmitted to the plug-in flange, forming vibration and noise. However, since the limiting flange is connected to the plug-in flange through the surface thread and there are radial and axial limiting gaps between the limiting flange and the connecting flange, the vibration can be reduced and the safety can be increased, so that the vibration and noise at this time are greatly reduced compared with those generated by the acoustic detection module, achieving the expected vibration isolation effect.

[0043] In summary, the above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-vibration device for reducing the self-vibration of an acoustic detection module, characterized in that, it includes a connecting flange, a transition flange, an anti-vibration body, a limiting flange and a plugging flange; on the end faces of one sides of the transition flange and the plugging flange, there are grooves that fit the anti-vibration body, and on the side of the plugging flange with the groove, there are threaded connection holes; one end of the limiting flange has an external thread that matches the threaded connection hole of the plugging flange; one side of the transition flange is fixedly connected to the connecting flange, the sides of the transition flange and the plugging flange with grooves are arranged opposite to each other, both ends of the anti-vibration body are respectively embedded in the grooves of the transition flange and the plugging flange and fixed, and there is a gap between the lower end face of the transition flange and the upper end face of the plugging flange; the end of the limiting flange with the external thread and the plugging flange are fixedly connected by threads, and the other end of the limiting flange is located in the annular space formed by the connecting flange and the transition flange, so that there are radial limiting and axial limiting gaps between the limiting flange and the connecting flange and the transition flange.

2. The anti-vibration device for reducing the self-vibration of an acoustic detection module according to claim 1, characterized in that, the connecting flange is of an annular structure, both ends of the annular structure extend horizontally in the radial direction to form connecting parts, and through holes are processed on the connecting parts; ten through holes are processed on the annular structure along the circumferential direction, and the angle between every two adjacent holes is 36°.

3. The anti-vibration device for reducing the self-vibration of an acoustic detection module according to claim 2, characterized in that, the transition flange is of an annular structure, on one side end face thereof, threaded holes for mating connection with the connecting flange are processed, on the other side end face, a groove that fits the anti-vibration body is processed, there is a through hole at the bottom of the groove, and a convex edge extends radially along the inner ring of this side end face.

4. The anti-vibration device for reducing the self-vibration of an acoustic detection module according to claim 3, characterized in that, the anti-vibration body is a middle hollow structure processed from metamaterial, there are two symmetric blind pin holes at both the upper and lower ends of the anti-vibration body, and screw sleeves are installed in the blind pin holes.

5. The anti-vibration device for reducing the self-vibration of an acoustic detection module according to claim 4, characterized in that, the limiting flange is of a cylindrical structure, one end thereof is processed with an external thread for connection with the plugging flange, and a convex edge extends radially along the outer circumferential surface of the other end; a plurality of uniformly distributed through holes are processed on the outer circumferential surface of the limiting flange.

6. The anti-vibration device for reducing the self-vibration of an acoustic detection module according to claim 5, characterized in that, the inner hole of the plugging flange is processed with an internal thread for mating with the limiting flange, and on the end face of the plugging flange, a groove that fits the anti-vibration body is processed, and there is a through hole at the bottom of the groove.

7. The anti-vibration device for reducing the self-vibration of an acoustic detection module according to claim 5 or 6, characterized in that, the connecting flange, the transition flange, the limiting flange and the plugging flange are processed with 6061-T6 alloy material.

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