Sound-absorbing panel and noise reduction box

Abstract

The present invention relates to the technical field of sound-absorbing panels, specifically disclosing a sound-absorbing panel and a noise-reduction box. The sound-absorbing panel comprises a panel body and a sound-transmitting panel. The panel body is recessed with multiple sound absorbers at intervals, each comprising a muffler cavity and a sound-absorbing port communicating with the muffler cavity, the sound-absorbing port being a constricted structure. The sound-transmitting panel is also provided with multiple sound-inlet holes extending therethrough, the sound-transmitting panel being positioned within the sound-absorbing port and fixedly connected to the panel body. The absorbers and sound-transmitting panel in the panel can reduce the intensity of noise within the box without affecting the efficient operation of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of sound-absorbing panels, and in particular to a sound-absorbing panel and a noise reduction box. Background Art

[0002] Gear vibration is caused by the inevitable errors in pitch and tooth profile during transmission between gears. This friction and contact during operation repeatedly create noise. Long-term gear transmission noise not only affects the production environment but also poses a threat to the health of operators. Therefore, finding a reasonable way to reduce gear transmission noise is crucial.

[0003] Traditional noise reduction methods for mechanical transmissions involve reducing load, lowering vibration frequency, and reducing gear friction. However, these methods often affect power transmission and equipment efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a sound absorbing panel and a noise reduction box to solve the problem in the related art that the noise of the gear transmission in the gear box can be reduced without affecting the normal operation of the equipment.

[0005] In one aspect, the present invention provides a sound absorbing panel, comprising:

[0006] A sound-absorbing board body, wherein a plurality of sound absorbers are recessed and spaced apart on the sound-absorbing board body, wherein the sound absorbers include a sound-absorbing cavity and a sound-absorbing port communicating with the sound-absorbing cavity, and the sound-absorbing port is a constricted structure;

[0007] A sound-transmitting plate is provided with a plurality of through sound-inlet holes at intervals, and the sound-transmitting plate is arranged at the sound-absorbing opening and fixedly connected to the sound-absorbing plate body.

[0008] As an optimal technical solution for the sound-absorbing panel, the silencing cavity is a curved structure.

[0009] As a preferred technical solution for the sound-absorbing panel, the sound-transmitting panel is elastic.

[0010] As a preferred technical solution of the sound-absorbing panel, a shock-absorbing member is further included. The shock-absorbing member includes a plurality of elastic rods. The plurality of elastic rods are fixedly arranged on the sound-transmitting panel at intervals and located in the silencing cavity.

[0011] As a preferred technical solution for the sound absorbing panel, the shock absorbing member further comprises a plurality of collision balls, and the plurality of collision balls are fixedly connected to one end of the plurality of elastic plates away from the sound-transmitting plate in a one-to-one correspondence.

[0012] As a preferred technical solution for the sound-absorbing panel, the lengths of the plurality of elastic rods are different.

[0013] As a preferred technical solution of the sound absorbing panel, the sound absorbing panel body is provided with connecting ears, and the connecting ears are provided with bolt holes.

[0014] On the other hand, the present invention provides a noise reduction box, which uses the sound absorbing panel in any of the above solutions, and the sound absorbing panel is fixed to the inner wall of the noise reduction box.

[0015] As a preferred technical solution of the noise reduction box, an installation groove is recessed on the inner wall of the noise reduction box, and the sound absorbing board body is arranged in the installation groove and abuts against the groove wall of the installation groove.

[0016] As a preferred technical solution of the noise reduction box, the sound absorbing panel body is provided with a connecting ear, and the connecting ear is provided with a bolt hole;

[0017] The bolt passes through the bolt hole and is screwed to the inner wall of the noise reduction box.

[0018] The beneficial effects of the present invention are:

[0019] The present invention provides a sound-absorbing panel, which includes a sound-absorbing panel body and a sound-transmitting panel. The sound-absorbing panel body is recessed with a plurality of sound absorbers at intervals, and the sound absorbers include a sound-absorbing cavity and a sound-absorbing port connected to the sound-absorbing cavity, and the sound-absorbing port is a constricted structure. The sound-transmitting panel is provided with a plurality of through-holes at intervals, and the sound-transmitting panel is disposed at the sound-absorbing port and fixedly connected to the sound-absorbing panel body. When noise is generated within a box, the noise within the box is transmitted to the sound-absorbing panel body disposed on the inner wall of the box, and the noise enters the sound-absorbing cavity through the sound-transmitting port on the sound-transmitting panel. The noise in the sound-absorbing cavity is continuously reflected from the cavity wall, and most of the noise gradually disappears with energy loss during the continuous reflection process. During the process of noise reflection within the sound-absorbing cavity, some noise will be directed toward the sound-absorbing port. The sound-transmitting panel can block some of the noise directed toward the sound-absorbing port. Therefore, the device can reduce the intensity of noise within the box without changing the performance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a top view of a sound-absorbing panel according to an embodiment of the present invention;

[0021] Figure 2 is a cross-sectional view of a sound-absorbing panel according to an embodiment of the present invention;

[0022] Figure 3 Schematic diagram of the structure of the sound-transmitting plate in an embodiment of the present invention;

[0023] Figure 4 Schematic diagram of the structure of the sound absorber, the sound-transmitting plate and the shock-absorbing member in an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the assembly of the inner wall of the noise reduction box and the sound absorbing panel in the embodiment of the present invention Figure 1 ;

[0025] Figure 6 Schematic diagram of the assembly of the inner wall of the noise reduction box and the sound absorbing panel in the embodiment of the present invention Figure 2 .

[0026] In the picture:

[0027] 1. Sound-absorbing panel body; 11. Sound absorber; 111. Silence chamber; 112. Sound-absorbing port; 12. Connecting ear; 121. Bolt hole;

[0028] 2. Sound-permeable panel; 21. Sound inlet hole;

[0029] 3. Shock absorber; 31. Elastic rod; 32. Collision ball;

[0030] 4. Inner wall of noise reduction box; 41. Installation slot. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0034] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0035] The box body is generally made of cast iron, and its sound is mainly caused by the excitation of the transmission parts. The gear meshing area is the excitation source of the box body. Part of the generated sound energy is transmitted to the shaft as solid sound and then to the box wall, and the other part is transmitted through the air. This technology mainly provides a noise reduction method for primary air transmission.

[0036] like Figures 1 to 4 As shown, this embodiment provides a sound-absorbing panel, comprising a panel body 1 and a sound-transmitting panel 2. The panel body 1 is provided with a plurality of recessed sound absorbers 11 at intervals. The sound absorbers 11 include a sound-absorbing cavity 111 and a sound-absorbing port 112 communicating with the sound-absorbing cavity 111. The sound-absorbing port 112 is a concave-shaped structure. The sound-transmitting panel 2 is provided with a plurality of through-holes 21 at intervals. The sound-transmitting panel 2 is positioned at the sound-absorbing port 112 and is fixedly connected to the panel body 1. When noise is generated within a box, it propagates to the panel body 1, which is located on the inner wall of the box. The noise then enters the sound-absorbing cavity 111 through the sound-transmitting port 21 on the sound-transmitting panel 2. The noise within the sound-absorbing cavity 111 is continuously reflected from the cavity wall. Most of the noise gradually disappears during this process of reflection, accompanied by energy loss. During the reflection process within the sound-absorbing cavity 111, some of the noise is directed toward the sound-absorbing port 112. The sound-transmitting panel 2 blocks some of the noise directed toward the sound-absorbing port 112. Therefore, the device can reduce the intensity of the noise inside the box without changing the performance of the equipment.

[0037] Specifically, to prevent the noise in the silencing cavity 111 from being emitted from the sound absorbing opening 112, the sound absorbing opening 112 can be optionally configured as a constricted structure. In this embodiment, configuring the sound absorbing opening 112 as a constricted structure can reduce the noise in the silencing cavity 111 from being emitted from the sound absorbing opening 112.

[0038] To prevent noise from within the silencing chamber 111 from being directed toward the sound absorption port 112, the silencing chamber 111 has a curved surface. In this embodiment, this curved surface reduces the amount of sound waves that escape from the sound absorption port 112. Specifically, the parameters of the curved surface are related to the noise and sound waves and require specific calculation. Preferably, the silencing chamber 111 has an altar-shaped structure. Due to its small opening and large cavity, sound waves entering the altar propagate within the silencing chamber 111 and are less likely to escape from the sound absorption port.

[0039] Optionally, the sound-permeable panel 2 is elastic. In this embodiment, because the sound-permeable panel 2 is elastic, when sound waves act on the sound-permeable panel 2, the sound-permeable panel 2 vibrates. Consequently, the sound-permeable panel 2 can convert some of the sound wave energy into vibrations, thereby dissipating some of the noise. At the same time, during long-term use, dust and other impurities are easily introduced into the sound inlet 21 of the sound-permeable panel 2. However, since the sound-permeable panel 2 vibrates under the action of sound waves, the sound-permeable panel 2 vibrates dust and impurities in the sound inlet 21 out of the sound inlet 21, thereby ensuring that the noise can smoothly enter the muffler chamber 111 through the sound inlet 21.

[0040] Optionally, the sound-permeable plate 2 is a thin sheet structure with elasticity. In this embodiment, the sound-permeable plate 2 is a thin sheet structure with elasticity that can vibrate slightly under the drive of noise.

[0041] As for the specific material of the sound-transmitting panel 2, optionally, the sound-transmitting panel 2 is made of calcium silicate material. In this embodiment, since the interior of the box is a high-temperature and humid environment, in order to ensure the normal operation of the sound-transmitting panel 2, the sound-transmitting panel 2 is made of calcium silicate, which has fire-proof and moisture-proof effects.

[0042] Since the generation of noise is inseparable from vibration, the generation of noise can be further reduced by reducing vibration. In order to further enhance the noise reduction effect of the sound-absorbing panel, optionally. The sound-absorbing panel also includes a shock-absorbing member 3, and the shock-absorbing member 3 includes a plurality of elastic rods 31, and the plurality of elastic rods 31 are fixed at intervals on the sound-transmitting panel 2 and are located in the muffler cavity 111. In this embodiment, when the box body vibrates, the sound-absorbing panel body 1 will vibrate along with the box body, and then the sound-absorbing panel body 1 drives the elastic rods 31 located on the sound-transmitting panel 2 to vibrate. Since the elastic rods 31 are elastic, they will collide with each other during the deformation process of the elastic rods 31. In this process, the elastic rods 31 will generate reverse vibration, thereby absorbing part of the vibration of the sound-absorbing panel body 1, thereby reducing noise.

[0043] To further enhance the deformation amplitude of the elastic rods 31 and increase their vibration-absorbing capacity, the shock absorber 3 also includes a plurality of collision balls 32, each of which is fixedly connected to the ends of the elastic rods 31 facing away from the sound-transmitting panel 2. In this embodiment, the elastic rods 31 are driven by the collision balls 32 to swing significantly. During this swing, the collision balls 32 and the elastic rods 31 to which they are fixed collide with adjacent collision balls 32 and their attached elastic rods 31, thereby absorbing some of the vibration energy and reducing the noise generated by the vibration.

[0044] The lengths of the elastic rods 31 can optionally be different. In this embodiment, since the vibration frequencies of the noise reduction box vary, the frequencies of vibration transmitted to the sound-absorbing panel body 1 also vary. Therefore, providing elastic plates 31 of varying lengths can absorb vibrations of varying frequencies from the noise reduction box. This arrangement also increases the density of the shock absorbers 3 while ensuring that the multiple shock absorbers 3 are spaced apart from one another.

[0045] In addition, it should be noted that the collision balls 32 and the elastic rods 31 are spaced apart on the sound-transmitting plate 2 , thereby preventing the sound waves in the muffler cavity 111 from being emitted from the sound inlet hole 21 .

[0046] In order to facilitate the installation of the sound absorbing panel, the sound absorbing panel body 1 is optionally provided with a connecting ear 12, and the connecting ear 12 is provided with a bolt hole 121. In this embodiment, the connecting ear 12 can be fixed to the component requiring sound insulation by bolts.

[0047] Optionally, the sound absorbing panel body 1 is integrally formed. In this embodiment, the sound absorbing panel body 1 can be made by casting or 3D printing. In other embodiments, the sound absorbing panel body 1 can also be made by hollowing the sound absorber 11 on a flat plate.

[0048] like Figure 5 and 6 As shown, this embodiment further provides a noise reduction box, comprising the sound absorbing panel of the above solution, which is fixed to the inner wall 4 of the noise reduction box. Noise generated in the noise reduction box can be absorbed by the sound absorbing panel fixed to the inner wall 4 of the noise reduction box.

[0049] To prevent the sound-absorbing panel from occupying the interior volume of the noise reduction box after it is attached, a mounting groove 41 is optionally provided in the inner wall 4 of the noise reduction box. The sound-absorbing panel body 1 is positioned within the mounting groove 41 and abuts against the wall of the mounting groove 41. In this embodiment, the mounting groove 41 is provided in the inner wall 4 of the noise reduction box, and the sound-absorbing panel body 1 is directly mounted within the mounting groove 41. The sound-absorbing panel body 1 does not occupy the existing volume of the noise reduction box.

[0050] Regarding the processing of the mounting groove 41 , the mounting groove 41 may be directly dug on the inner wall 4 of the noise reduction box, or the mounting groove 41 may be reserved during the injection molding process when processing the noise reduction box.

[0051] Regarding how the sound-absorbing panel body 1 is secured within the mounting slot 41, the panel body 1 may optionally be provided with a connecting lug 12 having a bolt hole 121. Bolts may pass through the bolt hole 121 and be screwed to the inner wall 4 of the noise reduction box. In other embodiments, the connecting lug 12 may be secured to the inner wall 4 of the noise reduction box by riveting.

[0052] As for the thickness of the inner wall 4 of the noise reduction box, optionally, the thickness of the inner wall 4 of the noise reduction box is 10 mm. In this embodiment, because the sound absorption performance of the inner wall 4 of the noise reduction box is closely related to the thickness of the material, if the material is too thin, it cannot play an effective sound absorption role. Because the conditions for absorption of sounds of different frequencies are different. High-frequency sounds have short wavelengths and can be easily absorbed, while low-frequency sounds have long wavelengths and can easily penetrate obstacles. For low-frequency sounds, it is not only difficult to soundproof, but also difficult to absorb. However, as long as the thickness of the material of the inner wall of the box is sufficient, low frequencies above 130 Hz can be absorbed. Therefore, to achieve a more ideal sound absorption effect, the thickness of the inner wall of the box must be at least greater than 10 mm, otherwise it cannot be used as a sound-absorbing structure.

[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A sound-absorbing panel, characterized in that: include: A sound absorbing board body (1), wherein a plurality of sound absorbers (11) are recessed and spaced apart on the sound absorbing board body (1), the sound absorbers (11) comprising a sound absorbing cavity (111) and a sound absorbing port (112) communicating with the sound absorbing cavity (111), the sound absorbing port (112) being a constricted structure; A sound-permeable plate (2), wherein a plurality of through-going sound inlet holes (21) are arranged at intervals on the sound-permeable plate (2), and the sound-permeable plate (2) is arranged at the sound-absorbing opening (112) and is fixedly connected to the sound-absorbing plate body (1); The muffler cavity (111) is a curved surface structure; The sound-transmitting plate (2) has elasticity; When sound waves act on the sound-transmitting plate (2), the sound-transmitting plate (2) vibrates.

2. The sound absorbing panel according to claim 1, characterized in that It also includes a shock absorbing member (3), the shock absorbing member (3) including a plurality of elastic rods (31), the plurality of elastic rods (31) being fixedly arranged on the sound-transmitting plate (2) at intervals and located in the muffler cavity (111).

3. The sound absorbing panel according to claim 2, characterized in that: The shock-absorbing member (3) further comprises a plurality of collision balls (32), and the plurality of collision balls (32) are fixedly connected one by one to one ends of the plurality of elastic rods (31) away from the sound-transmitting plate (2).

4. The sound absorbing panel according to claim 2, characterized in that: The lengths of the multiple elastic rods (31) are different.

5. The sound absorbing panel according to claim 1, characterized in that: The sound absorbing board body (1) is provided with a connecting ear (12), and the connecting ear (12) is provided with a bolt hole (121).

6. A noise reduction box, characterized in that: The sound absorbing panel according to any one of claims 1 to 5 is fixed on the inner wall (4) of the noise reduction box.

7. The noise reduction box according to claim 6, characterized in that: The inner wall (4) of the noise reduction box is recessed with a mounting groove (41), and the sound absorbing board body (1) is arranged in the mounting groove (41) and abuts against the groove wall of the mounting groove (41).

8. The noise reduction box according to claim 7, characterized in that: The sound absorbing panel body (1) is provided with a connecting ear (12), and the connecting ear (12) is provided with a bolt hole (121); The bolt passes through the bolt hole (121) and is screwed to the inner wall (4) of the noise reduction box.

Images