A low-noise air-cooled motor shell sound attenuation cavity structure

Abstract

The utility model discloses a kind of sound-absorbing cavity structures of low-noise air-cooled motor shell, the device includes: motor shell, the motor shell is sequentially provided with first cavity and second cavity from inside to outside, soundproofing cotton is equipped in the first cavity, soundproofing cotton one end is equipped with soundproofing board, a circle of triangular support plate is equipped in the second cavity, the second cavity is vacuum-like.The utility model has the advantages that: first cavity and second cavity form double sound-absorbing structure.Soundproofing cotton in first cavity cooperates with honeycomb soundproofing board, wherein the grid three-dimensional structure of soundproofing cotton can increase the contact area with noise, and high-frequency airflow noise can be efficiently absorbed;Honeycomb soundproofing board utilizes the porous feature of honeycomb structure, further blocks and attenuates noise.The vacuum state of second cavity can cut off the path of sound propagation through air, effectively blocks low-frequency vibration noise, and double cavity cooperates, meets the use scene that air-cooled motor is higher in noise control requirement.

Description

Technical Field

[0001] This utility model belongs to the field of motor noise reduction technology, specifically relating to a sound-absorbing cavity structure for a low-noise air-cooled motor housing. Background Technology

[0002] Existing air-cooled motors generate significant noise during operation due to rotor rotation, airflow disturbance, and mechanical vibration, which has become a key bottleneck restricting equipment performance improvement. Current noise reduction designs for air-cooled motor housings typically employ a single-layer sound insulation structure, which is insufficient to simultaneously address both high-frequency airflow noise and low-frequency vibration noise generated during motor operation. This results in limited noise reduction effectiveness and fails to meet the demands of applications requiring high noise control.

[0003] Therefore, there is an urgent need to provide a low-noise air-cooled motor housing silencing cavity structure to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide a sound-absorbing cavity structure for a low-noise air-cooled motor housing, in order to solve the technical problem that the existing noise reduction design of air-cooled motor housings usually adopts a single-layer sound insulation structure, which cannot meet the requirements of application scenarios with high noise control requirements.

[0005] To solve the above-mentioned technical problems, this utility model provides a sound-absorbing cavity structure for a low-noise air-cooled motor housing, comprising: a motor housing, wherein the motor housing is provided with a first cavity and a second cavity from the inside to the outside, the first cavity is provided with sound-absorbing cotton, one end of the sound-absorbing cotton is provided with a sound-absorbing plate, the second cavity is provided with a triangular support plate, and the second cavity is in a vacuum state.

[0006] As a further explanation, the end of the sound insulation cotton facing the inside of the motor housing has three horizontally parallel strip-shaped protrusions intersecting with three vertically parallel strip-shaped protrusions to form a grid-like three-dimensional structure.

[0007] As further explained, the cross-section of the sound insulation panel is honeycomb-shaped.

[0008] As further explained, the triangular support plate is provided with several evenly distributed through holes.

[0009] As further explained, the upper surface of the motor housing is provided with several heat dissipation fins.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. By setting up a first cavity and a second cavity from the inside out, a dual sound-absorbing structure is formed. The sound-absorbing cotton in the first cavity works in conjunction with a honeycomb-shaped sound-absorbing panel. The mesh-like three-dimensional structure of the sound-absorbing cotton increases the contact area with noise, effectively absorbing high-frequency airflow noise; the honeycomb-shaped sound-absorbing panel utilizes the porous characteristics of the honeycomb structure to further block and attenuate noise. The vacuum state of the second cavity cuts off the path of sound transmission through the air, effectively blocking low-frequency vibration noise. The synergistic effect of the dual cavities achieves targeted treatment of noise in different frequency bands, with a sound-absorbing effect far superior to traditional single-layer sound insulation structures.

[0012] 2. The triangular support plate inside the second chamber utilizes the stability of a triangle to provide reliable support for the vacuum chamber, preventing structural deformation due to vibration during motor operation. This ensures the long-term stability of the silencing structure and solves the problem of insufficient strength and easy deformation in some silencing structures. Simultaneously, the through-hole design on the triangular support plate reduces material usage and overall weight while maintaining support strength.

[0013] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a preferred three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a preferred cross-sectional view of the present invention;

[0018] Figure 3 yes Figure 2 Exploded view of point A in the middle;

[0019] Figure 4 This is a three-dimensional structural diagram of the triangular support plate of this utility model.

[0020] In the picture:

[0021] 1 Motor housing, 2 First cavity, 201 Sound insulation cotton, 202 Sound insulation board, 3 Second cavity, 301 Triangular support plate, 4 Heat dissipation fins. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Reference Figure 1-4 A noise reduction cavity structure for a low-noise air-cooled motor housing includes: a motor housing 1, with a first cavity 2 and a second cavity 3 arranged sequentially from the inside out. The first cavity 2 contains sound-absorbing cotton 201, with a sound-absorbing plate 202 at one end. The second cavity 3 contains a ring of triangular support plates 301 and is in a vacuum state. The first cavity 2 and the second cavity 3, arranged from the inside out, form a dual noise reduction structure. The sound-absorbing cotton 201 in the first cavity 2 absorbs sound energy through its porous structure, and the sound-absorbing plate 202 further blocks noise propagation. The vacuum state of the second cavity 3 utilizes the property that sound cannot propagate in a vacuum, cutting off the airborne propagation path of noise. The triangular support plates 301 provide structural support for the vacuum cavity, ensuring its stability. This design achieves multi-layered noise isolation through a dual-cavity design. Compared to traditional single-layer sound insulation structures, it can simultaneously address noise along different propagation paths, significantly improving the noise reduction effect.

[0024] like Figure 3 As shown, the end of the sound insulation cotton 201 facing the inside of the motor housing 1 has three horizontally parallel strip-shaped protrusions intersecting with three vertically parallel strip-shaped protrusions to form a grid-like three-dimensional structure. This structure can increase the contact area between the sound insulation cotton 201 and the noise inside the motor, improve the absorption efficiency of high-frequency airflow noise, extend the sound propagation path in the sound insulation cotton 201, and allow more sound energy to be absorbed.

[0025] like Figure 3 As shown, the cross-section of the sound insulation panel 202 is honeycomb-shaped. Utilizing the porous and multi-cavity characteristics of the honeycomb structure, when sound passes through, it is reflected, refracted, and rubbed within the honeycomb pores, converting sound energy into heat energy and dissipating it. Simultaneously, the rigidity of the honeycomb structure enhances the sound insulation panel's resistance to deformation. The sound insulation effect is further improved when used in conjunction with sound-insulating cotton 201 within the first cavity 2.

[0026] like Figure 4As shown, the triangular support plate 301 has several evenly distributed through holes. This through-hole design balances structural strength with noise reduction requirements, preventing the triangular support plate 301 from becoming a new noise transmission path. It also ensures a more complete vacuum within the second cavity 3, resulting in better sound insulation.

[0027] like Figure 1 As shown, the upper surface of the motor housing 1 is provided with several heat dissipation fins 4. The heat dissipation fins 4 on the upper surface of the motor housing 1 increase the contact area with the air, accelerate the dissipation of heat through convection and radiation, and solve the problem of heat dissipation obstruction that may be caused by the two silencing cavities.

[0028] All components selected in this application (parts whose specific structures are not described) are general standard parts or parts known to those skilled in the art, and their structures and principles can be obtained by those skilled in the art through technical manuals.

[0029] This knowledge can be obtained through conventional experimental methods.

[0030] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0031] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0032] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A sound-absorbing cavity structure for a low-noise air-cooled motor housing, characterized in that, include: The motor housing (1) is provided with a first cavity (2) and a second cavity (3) from the inside to the outside. The first cavity (2) is provided with sound insulation cotton (201), and one end of the sound insulation cotton (201) is provided with a sound insulation plate (202). The second cavity (3) is provided with a triangular support plate (301), and the second cavity (3) is in a vacuum state.

2. The sound-absorbing cavity structure for a low-noise air-cooled motor housing as described in claim 1, characterized in that, The sound insulation cotton (201) has three horizontally parallel strip protrusions and three vertically parallel strip protrusions intersecting to form a grid-like three-dimensional structure at one end facing the inside of the motor housing (1).

3. The sound-absorbing cavity structure for a low-noise air-cooled motor housing as described in claim 1, characterized in that, The cross-section of the sound insulation panel (202) is honeycomb-shaped.

4. The sound-absorbing cavity structure for a low-noise air-cooled motor housing as described in claim 1, characterized in that, The triangular support plate (301) is provided with several evenly distributed through holes.

5. The sound-absorbing cavity structure for a low-noise air-cooled motor housing as described in claim 1, characterized in that, The upper surface of the motor housing (1) is provided with several heat dissipation fins (4).

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