A sound insulation and vibration reduction structure

Abstract

The present invention belongs to the technical field of noise control, and discloses a sound insulation and vibration reduction structure, which includes a sound insulation unit, the sound insulation unit includes a sound insulation board, a first mass block and a plurality of second mass blocks, the sound insulation board includes a sound insulation board body and a frame connected to the sound insulation board body, the sound insulation board body and the frame form a receiving cavity for accommodating noise, the sound insulation board body is elastic, the first mass block and the plurality of second mass blocks are connected to the sound insulation board body, and the plurality of second mass blocks are arranged at intervals and evenly distributed around the first mass block. The sound insulation and vibration reduction structure provided by the present invention can broaden the working frequency band, can realize sound insulation and vibration reduction in a wide frequency range, can reduce the initial working frequency, has a simple structure, and has a wide range of applications.

Description

Technical Field

[0001] The invention relates to the technical field of noise control, and in particular to a sound insulation and vibration reduction structure. Background Art

[0002] Structures such as household appliances, industrial pipelines, building walls and transportation vehicles vibrate and radiate noise under the excitation of vibration or sound sources, which is called structural vibration-acoustic problem. Common vibration or sound sources are power devices, pressure pulsation and impact excitation. At present, the most widely used sound insulation method is to reduce vibration and noise on the vibration-acoustic transmission path. There are two main ways. One is to directly attach damping materials or dynamic vibration absorbers to the vibration-acoustic structure, but this method cannot reduce the noise of air noise that has escaped from the vibration-acoustic structure and propagated into the air; the other is to place a sound insulation or sound absorption barrier between the vibration or sound source and the receiver to hinder the propagation of air noise, but this method cannot reduce the structural vibration propagated by the vibration-acoustic structure. Summary of the invention

[0003] The purpose of the present invention is to provide a sound insulation and vibration reduction structure to solve the problems that the existing sound insulation and vibration reduction structure cannot prevent the escape of vibration and sound, has a narrow working frequency band, a large initial working frequency and cannot reduce noise and vibration.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A sound insulation and vibration reduction structure comprises a sound insulation unit, wherein the sound insulation unit comprises a sound insulation board, a first mass block and a plurality of second mass blocks, wherein the sound insulation board comprises a sound insulation board body and a frame connected to the four sides of the sound insulation board body, wherein the sound insulation board body and the frame form a receiving cavity for accommodating noise, wherein the sound insulation board body has elasticity, wherein the first mass block and the plurality of second mass blocks are connected to the sound insulation board body, and wherein the plurality of second mass blocks are arranged at intervals and evenly distributed around the first mass block.

[0006] Preferably, the total contact area between the plurality of second mass blocks and the sound insulation board body is smaller than the contact area between the first mass block and the sound insulation board body.

[0007] Preferably, the second mass block comprises a first end face and a second end face opposite to and spaced from the first end face, the second end face is connected to the sound insulation board body, and a contact area between the sound insulation board body and the second end face is smaller than an area of ​​the first end face.

[0008] Preferably, a plurality of the first mass blocks are provided.

[0009] Preferably, at least two of the plurality of first mass blocks have different shapes, or the plurality of first mass blocks have the same shape.

[0010] Preferably, a plurality of third mass blocks are disposed on each of the second mass blocks, and the plurality of third mass blocks are fixedly connected to the second mass block.

[0011] Preferably, both the first mass block and the second mass block can be detachably connected to the sound insulation board body.

[0012] Preferably, both the first mass block and the second mass block can be integrally formed with the sound insulation board body.

[0013] Preferably, the frame is provided with a connecting piece for connecting to a sound-insulated device.

[0014] Preferably, a plurality of the sound insulation units are provided, and the plurality of the sound insulation units are interconnected and arranged in an array.

[0015] Beneficial effects of the present invention:

[0016] The purpose of the present invention is to provide a sound insulation and vibration reduction structure, which includes a sound insulation unit, the sound insulation unit includes a sound insulation board, a first mass block and a plurality of second mass blocks, the sound insulation board includes a sound insulation board body and a frame connected to the four sides of the sound insulation board body, the sound insulation board body and the frame form a receiving cavity for accommodating noise, the sound insulation board body has elasticity, the first mass block and the plurality of second mass blocks are connected to the sound insulation board body, and the plurality of second mass blocks are arranged at intervals and evenly distributed around the first mass block. By providing a sound insulation board body and a frame connected to the periphery of the sound insulation board body, the sound insulation board body and the frame can form a receiving cavity for receiving noise, and the noise can be received in the receiving cavity. It can be understood that the sound insulation object is enclosed in the receiving cavity to enclose the noise in the receiving cavity to prevent the noise from propagating; the first mass block body and the second mass block are both connected to the sound insulation board body to provide mass, and the sound insulation board body has elasticity. The noise received in the receiving cavity is absorbed and dissipated under the action of the sound insulation board body and the first mass block and the second mass block to reduce the noise vibration; at the same time, the first mass block can also be used to reduce the initial working frequency, and the second mass blocks are spaced and evenly distributed around the first mass block. The second mass block can also be used to provide rotational inertia to broaden the high-frequency working frequency band, and can also further reduce the initial working frequency, thereby broadening the working frequency band of the sound insulation and vibration reduction structure, and the structure is simple and the application range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the structural intention of the sound insulation unit of the sound insulation and vibration reduction structure provided by the embodiment of the present invention;

[0018] Figure 2 This is the structural intention when a plurality of first mass blocks are arranged in the sound insulation unit of the sound insulation and vibration reduction structure provided by the embodiment of the present invention;

[0019] Figure 3 This is the structural intention when a plurality of second mass blocks are arranged in the sound insulation unit of the sound insulation and vibration reduction structure provided by the embodiment of the present invention;

[0020] Figure 4 It is a front view of a first type of a plurality of first mass blocks with different structures provided by an embodiment of the present invention for the sound insulation and vibration reduction structure;

[0021] Figure 5 It is a front view of a second type of a plurality of first mass blocks with different structures provided by an embodiment of the present invention for the sound insulation and vibration reduction structure;

[0022] Figure 6 It is a front view of the sound insulation and vibration reduction structure provided by an embodiment of the present invention when multiple sound insulation units are arranged.

[0023] In the figure:

[0024] 1. Sound insulation board body;

[0025] 2. Framework;

[0026] 3. The first mass block;

[0027] 4. The second mass block;

[0028] 5. The third mass block. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it 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, it can be the internal connection of two elements or the interaction relationship between 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.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0033] The present invention provides a sound insulation and vibration reduction structure, such as Figure 1 As shown, the sound insulation and vibration reduction structure includes a sound insulation unit, which includes a sound insulation board, a first mass block 3 and a plurality of second mass blocks 4. The sound insulation board includes a sound insulation board body 1 and a frame 2 connected to the sound insulation board body 1 around the sound insulation board body 1. The sound insulation board body 1 and the frame 2 form a receiving cavity for accommodating noise. The sound insulation board body 1 is elastic. The first mass block 3 and the plurality of second mass blocks 4 are all connected to the sound insulation board body 1. The plurality of second mass blocks 4 are arranged at intervals and evenly distributed around the first mass block 3. By providing the sound insulation board body 1 and the frame 2 connected to the four sides of the sound insulation board body 1, the sound insulation board body 1 and the frame 2 can form a accommodating cavity for accommodating noise, and the noise can be accommodated in the accommodating cavity. It can be understood that the sound insulation object is enclosed in the accommodating cavity to enclose the noise in the accommodating cavity to prevent the noise from propagating; the first mass block 3 and the second mass block 4 are connected to the sound insulation board body 1 to provide mass. The sound insulation board body 1 has elasticity. The noise accommodated in the accommodating cavity is absorbed and dissipated under the action of the sound insulation board body 1 and the first mass block 3 and the second mass block 4 to reduce the noise vibration; at the same time, the first mass block 3 can also be used to reduce the initial working frequency, and the second mass blocks 4 are spaced and evenly distributed around the first mass block 3. The second mass block 4 can also be used to provide rotational inertia to broaden the high-frequency working frequency band, and can also further reduce the initial working frequency, thereby broadening the working frequency band of the sound insulation and vibration reduction structure, and the structure is simple and the application range is wide.

[0034] Alternatively, if Figure 1As shown, the sum of the contact areas between the plurality of second mass blocks 4 and the sound insulation board body 1 is smaller than the contact area between the first mass block 3 and the sound insulation board body 1. The first mass block 3 is used to provide mass, the second mass block 4 is used to provide mass and moment of inertia, and the sound insulation board body 1 has elasticity. By setting the sum of the contact areas between the plurality of second mass blocks 4 and the sound insulation board body 1 to be smaller than the contact area between the first mass block 3 and the sound insulation board body 1, the sound insulation board body 1 and the first mass block 3 and the second mass block 4 work together to effectively reduce the low-frequency resonance mode of the vibration perpendicular to the surface of the vibration isolation device, thereby effectively reducing the vibration; at the same time, the initial working frequency can be reduced, the high-frequency working frequency band can be widened, and then the working frequency band of the sound insulation and vibration reduction structure can be widened.

[0035] Alternatively, if Figure 1 As shown, the second mass block 4 includes a first end face and a second end face opposite to the first end face and spaced apart, the second end face is connected to the sound insulation board body 1, and the contact area between the sound insulation board body 1 and the second end face is smaller than the area of ​​the first end face. When there is noise vibration along the vertical direction of the surface of the sound insulation device, by setting the contact area between the sound insulation board body 1 and the second end face smaller than the area of ​​the first end face, the moment of inertia of the second mass block 4 connected to the sound insulation board body 1 can be increased to increase the high-frequency working frequency band of the sound insulation and vibration reduction structure, and at the same time, the energy of the noise can be effectively absorbed, and then the energy of the noise is dissipated through the sound insulation board body 1, so as to achieve sound insulation and vibration reduction. Among them, under the condition that the mass of the second mass block 4 remains unchanged, the smaller the contact area between the sound insulation board body 1 and the second end face, the larger the moment of inertia of the second mass block 4, the lower the resonance frequency of the first mass block 3, and the wider the working frequency band of the sound insulation and vibration reduction structure. In other embodiments, such as Figure 3 As shown, eight second mass blocks 4 can be arranged around the first mass block 3, and the eight second mass blocks 4 are spaced and arranged around the first mass block 3. By arranging the eight second mass blocks 4, the eight second mass blocks 4 are used to provide mass and rotational inertia, which can broaden the high-frequency working frequency band, and can also further reduce the initial working frequency, thereby broadening the working frequency band of the sound insulation and vibration reduction structure, wherein the sum of the contact areas between the eight second mass blocks 4 and the sound insulation board body 1 is smaller than the contact area between the first mass block 3 and the sound insulation board body 1.

[0036] Alternatively, if Figure 2As shown, there are multiple first mass blocks 3. The first mass block 3 is used to provide mass. Under the condition that the mass of the first mass block 3 remains unchanged and the contact area with the sound insulation board body 1 remains unchanged, by setting the first mass block 3 into multiple pieces, the initial working frequency can be reduced compared with setting one first mass block 3, that is, the initial working frequency can be reduced without increasing the mass of the first mass block 3, thereby reducing the mass of the sound insulation unit, so as to achieve the effect of light weight, wide working frequency band and small initial working frequency value of the sound insulation and vibration reduction structure. Preferably, when four first mass blocks 3 are set on the sound insulation board body 1, the four first mass blocks 3 are arranged at intervals, and the interval between two adjacent first mass blocks 3 is 0.1mm to 10mm. The working frequency band of the sound insulation and vibration reduction structure is greater than the working frequency band of setting the first mass blocks 3 into one piece; at the same time, four second mass blocks 4 are spaced and evenly distributed around the four first mass blocks 3, which can widen the high-frequency working frequency band and further reduce the initial working frequency, thereby widening the working frequency band of the sound insulation and vibration reduction structure and suppressing noise vibration.

[0037] Alternatively, if Figure 2 , Figure 4 and Figure 5 As shown, at least two of the multiple first mass blocks 3 have different shapes, or the shapes of the multiple first mass blocks 3 are the same. By setting at least two of the first mass blocks 3 to have different shapes, or the shapes of the multiple first mass blocks 3 to be the same, the main working frequency band of the sound insulation unit can be changed, so that the user can select the corresponding sound insulation unit according to the noise frequency distribution characteristics of the sound insulation device; at the same time, under the condition that the mass of the first mass block 3 and the contact area with the sound insulation board body 1 remain unchanged, setting the first mass block 3 to multiple can further reduce the initial working frequency and reduce the peak value of the resonance peak of the sound insulation device compared to setting the first mass block 3 to one. It can be understood that the shape and number of the first mass block 3 can be determined according to the noise frequency distribution characteristics of the actual sound insulation device, and the shape and number of the second mass block 4 can also be determined according to the noise frequency distribution characteristics of the actual sound insulation device.

[0038] Alternatively, if Figure 1 and Figure 2As shown, each second mass block 4 is provided with a plurality of third mass blocks 5, and each of the third mass blocks 5 is fixedly connected to the second mass block 4. By providing a plurality of third mass blocks 5 on each second mass block 4, and each of the third mass blocks 5 is fixedly connected to the second mass block 4, the moment of inertia of the second mass block 4 is increased, the high-frequency working frequency band is further widened, the peak value of the resonance peak is reduced, and the initial working frequency is reduced, thereby further widening the working frequency band of the sound insulation and vibration reduction structure; at the same time, the third mass blocks 5 can also be used to absorb the energy of the noise, and then dissipate the energy of the noise through the sound insulation board body 1, thereby achieving sound insulation and vibration reduction. It can be understood that the number of the third mass blocks 5 can be determined according to the noise frequency distribution characteristics of the actual sound insulation device. Preferably, two third mass blocks 5 are arranged near both ends of each second mass block 4, and the third mass block 5 is composed of a first part and a second part connected to each other, the second part is fixedly connected to the second mass block 4, and the contact area between the second part and the second mass block 4 is smaller than the cross-sectional area of ​​the first part, so as to increase the moment of inertia of the second mass block 4, to broaden the high-frequency working frequency band, reduce the peak value of the resonance peak, reduce the initial working frequency, absorb noise energy, and further expand the working frequency band of the sound insulation and vibration reduction structure. In other embodiments, the second mass block 4 and the third mass block 5 can also be connected by an elastic member to increase the moment of inertia of the second mass block 4.

[0039] Optionally, the first mass block 3 and the second mass block 4 can be detachably connected to the sound insulation board body 1. By arranging that the first mass block 3 and the second mass block 4 can be detachably connected to the sound insulation board body 1, the number and arrangement of the first mass block 3, the second mass block 4 and the third mass block 5 can be easily adjusted.

[0040] Optionally, the first mass block 3 and the second mass block 4 may be integrally formed with the sound insulation board body 1. By arranging the first mass block 3 and the second mass block 4 to be integrally formed with the sound insulation board body 1, processing can be facilitated and labor costs can be saved.

[0041] Optionally, the frame 2 is provided with a connector for connecting to the sound-insulated device. By providing the connector, the sound insulation and vibration reduction structure can be fixedly connected to the sound-insulated device, thereby effectively closing the opening of the accommodating cavity and accommodating the noise in the accommodating cavity, thereby ensuring effective isolation of the noise of the sound-insulated device and absorbing and dissipating the energy of the noise. Specifically, the sound insulation unit can be connected by gluing, screwing or other connection methods. solid In other embodiments, a support column may be provided on the sound insulation board body 1, and a socket may be provided on the support column to facilitate plugging with the sound insulation device, so as to facilitate fixing the sound insulation and vibration reduction structure to the sound insulation device. In other implementations, a hook may be provided on the frame 2 to facilitate assembly or disassembly of the sound insulation and vibration reduction structure to the sound insulation device.

[0042] Alternatively, if Figure 6 As shown, a plurality of sound insulation units are provided, and the plurality of sound insulation units are interconnected and arranged in an array. By providing a plurality of sound insulation units, and the plurality of sound insulation units are interconnected and arranged in an array, it is convenient for the user to determine the number of sound insulation units based on the surface area of ​​different sound insulation devices. In other embodiments, a first mass block 3, a second mass block 4, and a third mass block 5 can be provided on both end surfaces of the sound insulation board body 1, which can further broaden the working frequency band of the sound insulation and vibration reduction structure.

[0043] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A sound insulation and vibration reduction structure, characterized in that: The invention comprises a sound insulation unit, wherein the sound insulation unit comprises a sound insulation board, a first mass block (3) and a plurality of second mass blocks (4); the sound insulation board comprises a sound insulation board body (1) and a frame (2) connected to the periphery of the sound insulation board body (1); the sound insulation board body (1) and the frame (2) form a receiving cavity for receiving noise; the sound insulation board body (1) is elastic; the first mass block (3) and the plurality of second mass blocks (4) are connected to the sound insulation board body (1); the plurality of second mass blocks (4) are arranged at intervals and are evenly distributed around the first mass block (3); The second mass block (4) comprises a first end face and a second end face opposite to and spaced from the first end face, the second end face being connected to the sound insulation board body (1), and a contact area between the sound insulation board body (1) and the second end face is smaller than an area of ​​the first end face.

2. The sound insulation and vibration reduction structure according to claim 1, characterized in that: The total contact area between the plurality of second mass blocks (4) and the sound insulation board body (1) is smaller than the contact area between the first mass block (3) and the sound insulation board body (1).

3. The sound insulation and vibration reduction structure according to claim 1, characterized in that: A plurality of the first mass blocks (3) are provided.

4. The sound insulation and vibration reduction structure according to claim 3, characterized in that: At least two of the plurality of first mass blocks (3) have different shapes, or the plurality of first mass blocks (3) have the same shape.

5. The sound insulation and vibration reduction structure according to claim 1, characterized in that: A plurality of third mass blocks (5) are arranged on each of the second mass blocks (4), and the plurality of third mass blocks (5) are fixedly connected to the second mass blocks (4).

6. The sound insulation and vibration reduction structure according to claim 1, characterized in that: The first mass block (3) and the second mass block (4) can both be detachably connected to the sound insulation board body (1).

7. The sound insulation and vibration reduction structure according to claim 1, characterized in that: The first mass block (3) and the second mass block (4) are both integrally formed with the sound insulation board body (1).

8. The sound insulation and vibration reduction structure according to claim 1, characterized in that: The frame (2) is provided with a connecting piece for connecting to a sound-insulated device.

9. The sound insulation and vibration reduction structure according to claim 1, characterized in that: The sound insulation units are provided in plurality, and the plurality of sound insulation units are interconnected and arranged in an array.

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