CN218760632U - Vibration-damping and noise-reducing structure, vibration-damping fan and range hood - Google Patents

Abstract

The utility model relates to a cigarette machine technical field especially relates to a structure, damping fan, cigarette machine of making an uproar falls in damping. The device comprises a circular sunken part, wherein the sunken part is provided with an arc bottom which gradually rises from the center along a radius line; the horizontal line distance between a certain point on the arc bottom and the lowest part of the arc bottom is h, the radius of the concave part is r, h changes along with r, and the change trend meets the following requirements: h (X) = (h/r) ^2.2 )×X ^2.2 (ii) a And a sound absorption piece made of damping material is arranged in the center of the concave part. The utility model disclosesBased on the acoustic black hole principle, the sunken part is arranged on the surface of the fan, and the bending wave reflection phenomenon is controlled through the sunken part, so that active control is achieved on vibration, and the noise reduction effect is enhanced.

Description

Vibration-damping and noise-reducing structure, vibration-damping fan and range hood

Technical Field

The utility model relates to a cigarette machine technical field especially relates to a structure, damping fan, cigarette machine of making an uproar falls in damping.

Background

The structural vibration is a main reason for causing the vibration of the fan, the fan vibration not only can cause the increase of the noise of the fan, but also can cause abnormal operation sound, so that the use comfort of a user is greatly reduced.

In the prior art, passive schemes are mostly adopted, for example, reinforcing ribs are arranged on a linear plate of the volute, the linear plate refers to a plate on the volute, which is adjacent to the air outlet, and the reinforcing ribs can protrude into the volute, so that the space in an air duct can be reduced, air flow can be guided, the effect of reducing wind noise can be achieved, and meanwhile, the structural strength can be enhanced, and the effect of reducing wind noise can be achieved; in addition, the reinforcing ribs can also protrude outwards from the volute so as to play a role in enhancing the structural strength and reducing the wind noise, but the passive scheme has a limited effect.

Utility model

The utility model aims to solve the technical problem that overcome prior art not enough and provide a novel damping noise reduction structure based on design of acoustics black hole principle, it can control bending wave reflection phenomenon to strengthen the noise reduction effect.

To solve the above technical problems

On one hand, the utility model provides a vibration damping and noise reducing structure, which comprises a circular depressed part, wherein the depressed part is provided with an arc bottom, and the arc bottom gradually rises from the center along a radius line; the horizontal line distance between a certain point on the arc bottom and the lowest part of the arc bottom is h, the radius of the concave part is r, h changes along with r, and the change trend meets the following requirements: h (x) = (h/r) ^2.2 )×x ^2.2 (ii) a And a sound absorption piece made of damping material is arranged in the center of the concave part.

Optionally, the structure comprises a first main body structure, wherein the concave part is arranged on the first main body structure, and the first main body structure is in an open shape and is formed by three panel pieces. The three-panel comprises a first panel, a second panel and a third panel, wherein the second panel and the third panel are vertically arranged on two opposite edges of the first panel.

Optionally, the second main body structure is included, the concave portion is arranged on the second main body structure, and the second main body structure is triangular and is formed by surrounding four panel pieces. The four-side plate comprises an arc-shaped first plate, a second plate positioned at the bottom and a third plate connected with the first plate and the second plate, wherein the first plate, the second plate and the third plate are of triangular structures, and the four-side plate further comprises a fourth plate connected with the first plate, the second plate and the third plate.

On the other hand, the utility model provides a damping fan, it includes the spiral case, installs the foretell damping that has the major structure one of opening form on the spiral case and falls the structure of making an uproar and/or install the foretell damping that has the major structure two of triangle-shaped shape and fall the structure of making an uproar.

On the other hand, the utility model provides a damping fan, it includes the spiral case, and the shaping has the depressed part on the spiral case.

On the other hand, the utility model provides a cigarette machine, it includes one of foretell damping fan.

Has the advantages that: the utility model discloses set up the depressed part on the fan surface based on acoustics black hole principle, control bending wave reflection phenomenon with this to play the control of initiative to the vibration through the depressed part to noise reduction has been strengthened.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a state diagram of two noise reduction structures mounted on a fan in the first and second embodiments, and a schematic matching diagram of the fan and a fan box body;

FIG. 2 is a schematic view illustrating a state where the noise reduction structure of the first embodiment is mounted on the scroll casing;

FIG. 3 is a schematic diagram of a noise reduction structure according to the first embodiment;

FIG. 4 is a schematic diagram of the trend of the recess;

FIG. 5 is a schematic view of the noise reduction principle of the recess;

FIG. 6 is a schematic view of a noise reduction structure according to a second embodiment;

FIG. 7 is a schematic bottom view of a noise reducing structure according to a second embodiment;

FIG. 8 is a schematic view of a noise reduction structure in the third embodiment;

in the figure:

the sound absorption structure comprises a concave part 1, a sound absorption member 2, a first main body structure 31, a second main body structure 32, a first plate 311, a second plate 312, a third plate 313, a first plate 321, a second plate 322, a third plate 323, a fourth plate 324, a second sound absorption member 4 and a volute 5.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

as shown in fig. 1-5, the vibration and noise reduction structure includes a circular recess 1.

Depressed part 1 has the circular arc bottom, and the circular arc bottom presents the trend of rising gradually along the radius line from the center, defines the horizontal line distance of some point on the circular arc bottom from the circular arc bottom minimum as the height h of arc, and the radius location of depressed part 1 is r, and h changes along with the change of r correspondingly, as shown in fig. 4, and the trend of change satisfies: h (x) = (h/r) ^2.2 )×x ^2.2 。

The change trend changes the phase velocity and the group velocity of the bending wave propagating in the structure by means of the change of the internal impedance of the structure, the wave energy is gathered in a local area of the structure, a wave trap similar to a lens is formed by reducing the thickness according to a certain power function form (the change of the height h is equivalent to the thickness change of a concave part), and when the thickness tends to be zero, the wave velocity is also 0, and the reflection phenomenon cannot occur.

The principle can be seen in fig. 5, and the transverse wave is weakened and gradually changed into the longitudinal wave concentration along with the thickness change. In order to absorb the concentrated energy, a sound absorbing member 2 made of a damping material is provided at the center of the recess 1 to absorb and cancel the corresponding concentrated energy.

In this embodiment, the depressed part 1 is formed on the first main body structure 31, the first main body structure 31 is an open sheet metal part formed by three metal plates, the first main body structure 31 is installed on one side of the air outlet of the volute 5 and covers the peripheral wall of the volute 5 and two adjacent side walls of the peripheral wall, the first main body structure 31 is used as the main body of the depressed part 1 and plays a role in enhancing the strength of the volute 5, and the strength of the volute 5 can be improved to reduce the exciting force so as to achieve the purpose of reducing noise.

The second implementation:

the difference between the second embodiment and the first embodiment is that the molding body of the recess 1 is changed.

As shown in fig. 6 and 7, in the present embodiment, the concave portion 1 is formed on the second main body structure 32, the second main body structure 32 is a triangular sheet metal part surrounded by four-sided metal sheet parts, the four-sided metal sheet parts include an arc-shaped first sheet part 321, the first sheet part 321 fits the outer peripheral wall of the scroll casing 5, and includes a second sheet part 322 at the bottom, a third sheet part 323 connecting the first sheet part 321 and the second sheet part 322, and a fourth sheet part 324 connecting the first sheet part 321, the second sheet part 322, and the third sheet part 323. The second main structure 32 is integrally arranged on the periphery of the volute 5, and is used for reducing noise and filling a part of gap between the volute 5 and the fan box body, so that the supporting and vibration damping effects are achieved.

On the basis, as a preferable scheme, the second plate 322 is provided with a plurality of through holes, and the second plate 322 is covered with the second sound absorbing piece 4 made of sound absorbing materials. The second plate 322 is perforated to reduce noise by using the resonance principle, and a resonance phenomenon is formed between a specific noise frequency and the second plate 322 having a set target frequency in a space. When resonance occurs, the oscillating sound waves violently pass back and forth in the air through the perforations, and the sound energy of the noise is converted into friction loss in the process, so that the effect of eliminating the noise at the target frequency is achieved. The sound absorption material covering the second plate 322 utilizes the porous characteristic of the material, when sound waves are incident to the surface of the porous material, a part of the sound waves can penetrate into the material, a part of the sound waves are reflected on the surface of the material, when the sound waves penetrating into the material are transmitted in gaps and small holes, viscous and friction effects can be generated by air movement, meanwhile, the temperature of the air in the small holes is increased when the air is compressed, and according to the heat conduction effect of the material, sound energy is gradually converted into heat energy to be consumed, so that the sound absorption effect is generated by the material. In this embodiment, polyurethane foam is preferably used as the sound absorbing material.

Example three:

the third embodiment is different from the first and second embodiments in that the main body of the recess 1 is formed in a different manner.

As shown in fig. 8, in the present embodiment, the recess 1 is directly formed on the scroll casing 5, and compared with the first embodiment and the second embodiment, the direct forming on the scroll casing 5 can save material.

It should be noted that the vibration-damping and noise-reducing structure in the first embodiment, the second embodiment and the third embodiment may be applied to a fan to form a vibration-damping fan. Meanwhile, the vibration and noise reduction structures in the first implementation and the second implementation can also be applied to the fan together to form a vibration reduction fan.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious modifications, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (12)

1. A vibration-damping noise-reducing structure is characterized by comprising a circular sunken part (1), wherein the sunken part (1) is provided with an arc-shaped bottom, and the arc-shaped bottom gradually rises from the center along a radius line; the horizontal line distance between a certain point on the arc bottom and the lowest part of the arc bottom is h, the radius of the concave part (1) is r, h changes along with r, and the change trend meets the following conditions: h (x) = (h/r) ^2.2 )×x ^2.2 (ii) a And a sound absorption piece (2) made of damping materials is arranged in the center of the sunken part (1).

2. A vibration and noise reducing construction according to claim 1, characterized in that it comprises a body construction, on which the recess (1) is provided.

3. A vibration and noise reducing construction according to claim 2, characterized in that the body construction comprises a first body construction (31), the first body construction (31) being open-ended, the first body construction (31) being formed by a three-sided plate member.

4. A vibration and noise reducing construction according to claim 3, wherein the three panel member comprises a first panel member (311), a second panel member (312) and a third panel member (313) which are perpendicularly disposed on opposite edges of the first panel member (311).

5. A vibration and noise reduction structure according to claim 2, wherein the main body structure comprises a second main body structure (32), the second main body structure (32) is triangular, and the second main body structure (32) is surrounded by four panel members.

6. A vibration and noise reduction structure according to claim 5, wherein the four plate members comprise a first plate member (321) having an arc shape, a second plate member (322) at the bottom, and a third plate member (323) connecting the first plate member (321) and the second plate member (322), the first plate member (321), the second plate member (322), and the third plate member (323) are triangular structures, and the four plate members further comprise a fourth plate member (324) connecting the first plate member (321), the second plate member (322), and the third plate member (323).

7. A vibration and noise reducing construction according to claim 6, characterized in that the second plate element (322) is provided with perforations.

8. A vibration and noise reducing construction according to claim 7, characterized in that the second plate (322) is covered with a second sound-absorbing element (4) of sound-absorbing material.

9. A vibration damping blower comprising a volute (5), the volute (5) being provided with a vibration damping and noise reducing structure as claimed in claim 4 and/or with a vibration damping and noise reducing structure as claimed in any one of claims 5 to 8.

10. A vibration damping fan, characterized by comprising a volute (5), wherein the volute (5) is provided with a vibration damping and noise reducing structure according to claim 1.

11. A cigarette maker comprising a vibration reducing fan according to claim 9.

12. A machine for producing tobacco comprising a vibration reducing fan according to claim 10.

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