阅读说明：本技术 一种抑振结构 (Vibration suppression structure ) 是由 汤又衡 王晓乐 罗旭东 赵春宇 黄震宇 于 2021-02-23 设计创作，主要内容包括：本发明涉及振动控制技术领域内的一种抑振结构,包括壳体与振板；所述壳体包括顶板、侧板以及底板,所述顶板与所述底板通过所述侧板连接成腔体结构,所述底板设有夹持口；所述振板包括第一振子板和第二振子板,所述第一振子板与所述第二振子板一体成型为折板结构；所述第一振子板连接于所述夹持口的侧边,所述第二振子板位于所述顶板和所述底板之间,所述夹持口相对的两侧边分别连接有所述振板。本发明通过壳体包裹参数敏感性较高的振板形成封闭或半封闭的抑振结构,能有效避免谐振结构受外力影响而导致设计频率偏移,提高低频抑振效果。(The invention relates to a vibration suppression structure in the technical field of vibration control, which comprises a shell and a vibration plate; the shell comprises a top plate, side plates and a bottom plate, the top plate and the bottom plate are connected into a cavity structure through the side plates, and the bottom plate is provided with a clamping opening; the vibrating plate comprises a first vibrating plate and a second vibrating plate, and the first vibrating plate and the second vibrating plate are integrally formed into a folded plate structure; the first vibrator plate is connected to the side edge of the clamping opening, the second vibrator plate is located between the top plate and the bottom plate, and the two opposite side edges of the clamping opening are respectively connected with the vibration plates. According to the invention, the vibration plate with higher shell wrapping parameter sensitivity forms a closed or semi-closed vibration suppression structure, so that the design frequency deviation caused by the influence of external force on the resonance structure can be effectively avoided, and the low-frequency vibration suppression effect is improved.)

1. A vibration suppression structure is characterized by comprising a shell (1) and a vibration plate (2);

the shell (1) comprises a top plate (11), side plates (12) and a bottom plate (13), the top plate (11) and the bottom plate (13) are connected into a cavity structure through the side plates (12), and the bottom plate (13) is provided with a clamping opening (131);

the vibrating plate (2) comprises a first vibrating plate (21) and a second vibrating plate (22), and the first vibrating plate (21) and the second vibrating plate (22) are integrally formed into a folded plate structure;

the first vibrator plate (21) is connected to the side edge of the clamping opening (131), the second vibrator plate (22) is located between the top plate (11) and the bottom plate (13), and two opposite side edges of the clamping opening (131) are respectively connected with the vibrator plates (2).

2. A vibration suppressing structure according to claim 1, wherein a plurality of said first vibrator plate (21) and/or a plurality of said second vibrator plate (22) are connected to one said vibrator plate (2).

3. The vibration suppressing structure according to claim 2, wherein the second vibrator plate (22) is formed with a plurality of adjacent vibration fins (221) by slitting.

4. The structure of claim 1 or 3, wherein the vibration suppressing plate (2) is provided in plurality and spaced from one side of the clamping opening (131), and the vibration suppressing plate (2) is provided in the same or different number on the opposite two sides of the clamping opening (131).

5. The vibration suppressing structure according to claim 4, wherein the second vibrator plate (22) is provided with a plurality of first micro holes (222), and the first micro holes (222) are provided.

6. The vibration suppressing structure according to claim 5, further comprising a mass (3), the mass (3) being connected to a surface of the second vibrator plate (22).

7. The vibration suppressing structure according to claim 1, further comprising a sealing plate (4), wherein the sealing plate (4) is used to form a protrusion or a recess in connection with the first vibrator plate (21) located on both sides of the clamping opening (131), and the second vibrator plate (22) is enclosed in the housing (1).

8. The vibration suppressing structure according to claim 7, wherein the top plate (11) is provided with a plurality of second micro holes (111), and the plurality of second micro holes (111) are provided.

9. Vibration suppressing structure as claimed in claim 7 or 8, characterized in that the housing (1) is filled with a damping material.

10. Vibration suppressing structure as claimed in any one of claims 1-3 and 5-8, characterized in that the housing (1) is formed integrally with the vibrating plate (2).

Technical Field

The invention relates to the technical field of vibration control, in particular to a vibration suppression structure.

Background

The high-magnitude structural vibration and radiated noise generated by objects such as electromechanical equipment, household appliances, vehicles, industrial pipelines, building doors and windows under the excitation of a power device or an external applied load can damage the hearing of people, cause the fatigue damage of the structure and harm the life and property safety. The low-frequency structure has longer vibration wavelength and stronger propagation capacity, and the effective inhibition needs to pay great space and weight cost.

The existing structure vibration suppression technology is mainly based on a dynamic vibration absorption principle, a spring-mass resonance system is added on an original part to be suppressed, and the vibration amplitude of the original structure is remarkably reduced by using the inertia force generated when the resonance system resonates. In order to reduce the resonant frequency of the resonant system in response to the low frequency structural vibration problem, the resonant system should have a small "spring" stiffness, or a sufficiently large "mass". Therefore, most of the low-frequency vibration suppression structures need larger size or larger weight cost, and are not suitable for occasions with compact structures, narrow spaces or complex application scenes. Moreover, the existing vibration suppression structures have obvious vibration suppression directivity and narrow-band characteristics, and meanwhile, because the vibration suppression structures comprise sensitive sheets greatly influenced by external force, the requirements of multi-directional vibration suppression, wide-band vibration suppression and stable service performance are difficult to meet.

The invention discloses a periodic structure with low-frequency vibration suppression performance based on local resonance band gap characteristics, which is found by the search of the prior art and has a Chinese patent publication No. CN106678271A, and the periodic structure comprises periodically distributed mass elements, elastic elements and a matrix. The periodic unit comprises a metal structure, namely a mass element, a circle of rubber or silica gel material annular structure, namely an elastic element, is surrounded by the side face of the mass element, the circumferential side face of the mass element is a curved surface with a certain shape, the elastic element and the mass element are mutually attached, then the elastic element is surrounded by the mass element and is periodically arranged in an elastic structure base body as a whole, and the elastic element and the base body are also mutually attached. The invention has the problems related to the above.

Disclosure of Invention

In view of the defects in the prior art, the invention aims to provide a vibration suppression structure.

The invention provides a vibration suppression structure, which comprises a shell and a vibration plate;

the shell comprises a top plate, side plates and a bottom plate, the top plate and the bottom plate are connected into a cavity structure through the side plates, and the bottom plate is provided with a clamping opening;

the vibrating plate comprises a first vibrating plate and a second vibrating plate, and the first vibrating plate and the second vibrating plate are integrally formed into a folded plate structure;

the first vibrator plate is connected to the side edge of the clamping opening, the second vibrator plate is located between the top plate and the bottom plate, and the two opposite side edges of the clamping opening are respectively connected with the vibration plates.

In some embodiments, a plurality of the first oscillator plates and/or a plurality of the second oscillator plates are connected to form one oscillator plate.

In some embodiments, the second vibrator plate is slit to form a plurality of adjacent vibrating fins.

In some embodiments, the vibration plates on the same side of the clamping opening are arranged at intervals, and the vibration plates on the two opposite sides of the clamping opening are the same or different in number.

In some embodiments, the second vibrator plate has a plurality of first micro holes formed therein.

In some embodiments, the second vibrator plate further comprises a mass connected to the second surface of the vibrator plate.

In some embodiments, the vibrator further includes a sealing plate, the sealing plate is used to connect with the first vibrator plate on two sides of the clamping opening to form a bump or a groove, and the second vibrator plate is enclosed in the housing.

In some embodiments, the top plate defines a second plurality of micro holes.

In some embodiments, the housing is filled with a damping material.

In some embodiments, the housing is integrally formed with the vibrating plate.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the vibration plate with higher shell wrapping parameter sensitivity forms a closed or semi-closed vibration suppression structure, so that the design frequency deviation caused by the influence of external force on the resonance structure can be effectively avoided, and the low-frequency vibration suppression effect is improved.

2. The invention improves the vibration suppression performance of the vibration suppression structure by the optimized design of the integral structure of the vibration plate connected to the shell.

3. According to the invention, through the optimized design of the overall structure of the second vibrator plate in the vibration plate, the overall working frequency of the vibration plate is reduced, and the low-frequency vibration suppression effect is improved.

4. The vibration suppression structure comprises a shell, a vibration plate, a vibration suppression structure and a vibration suppression structure, wherein the vibration plate is connected in the shell, and the vibration plate is connected with the shell.

5. The invention avoids the falling problem caused by the infirm connection of each component by the integrated forming process of the shell and the vibration plate, and ensures the vibration suppression effect of the vibration suppression structure.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a general schematic view of a vibration damping structure of a housing with an arc structure according to the present invention;

FIG. 2 is a general schematic view of a vibration suppressing structure of a rectangular housing according to the present invention;

FIG. 3 is a schematic structural diagram of a multi-stage vibrating plate according to the present invention;

fig. 4 is a schematic structural diagram of a gradient vibration plate provided in the present invention, wherein:

4a is a structural schematic diagram of the vibrating plate which regularly changes from one end to the other end;

4b is a structural schematic diagram of the vibrating plate which gradually narrows from two ends to the middle;

4c is a structural schematic diagram of the vibrating plate which gradually narrows from the middle to two ends;

fig. 5 is a schematic structural diagram of various embodiments of the integrated housing and vibrating plate provided by the present invention, wherein:

5a shows a structural schematic diagram of a vertical structure vibrating plate and a rectangular shell;

5b is a schematic diagram showing the structure that the vibrating plate with the vertical structure and the bottom plate are concave arcs;

5c is a schematic diagram of the structure that the vibrating plate and the bottom plate of the vertical structure are convex arcs;

5d is a structural schematic diagram of the arc-shaped vibrating plate and the rectangular shell;

5e represents a schematic diagram of the included angle structure vibrating plate and the rectangular shell;

5f is a schematic diagram of the vibrating plate with different bending structures and the rectangular shell;

5g is a structural schematic diagram of the vibration plate and the rectangular shell, wherein the vibration plate and the rectangular shell are arranged in parallel up and down on the second vibrator plate;

fig. 6 is a technical effect diagram of the vibration suppressing structure applied to the pipeline structure.

Fig. 7 shows the results of the vibration transmission characteristics of the vibration suppressing structure of the present invention before and after application to the pipe structure.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

Example 1

The invention provides a suppression structure with a resonator arranged in a shell, as shown in figures 1-7, comprising a shell 1 and a vibration plate 2, wherein the vibration plate 2 is used as a main component for suppressing low-frequency vibration, part or all of the vibration plate 2 is arranged in the shell 1, and the shell 1 can effectively protect the main resonance structure of the vibration plate 2, avoid design frequency deviation caused by the influence of external force on the resonance structure, and improve the low-frequency vibration suppression effect. Specifically, the method comprises the following steps:

the housing 1 is mainly a cavity structure enclosed by a top plate 11, a side plate 12 and a bottom plate 13, wherein the side plate 12 is located between the top plate 11 and the bottom plate 13. The shape of the shell 1 enclosing the cavity structure can be square, cylindrical, frustum-shaped, arc-shaped, irregular and the like, and is mainly determined according to the structure needing low-frequency vibration suppression, the installation space and the overall structure of the vibrating plate 2. The bottom plate 13 is provided with a clamping opening 131, and the clamping opening 131 is used for mounting the vibrating plate 2 and clamping a structural member to be subjected to vibration suppression. The clamping opening 131 may be a longitudinally or transversely penetrating opening formed in the axial direction of the base plate 13, or may be a partial opening.

The vibrating plate 2 is composed of a first vibrating plate 21 and a second vibrating plate 22, the first vibrating plate 21 is a vertical plate, the second vibrating plate 22 is a horizontal plate, and the first vibrating plate and the second vibrating plate are integrally formed into the vibrating plate 2 with a folded plate structure. Here, the folded plate structure means that an included angle exists at a connection position of the first vibrator plate 21 and the second vibrator plate 22, the included angle is between 0 ° and 180 °, and the included angle may also mean an arc degree, that is, both the first vibrator plate 21 and the second vibrator plate 22 are in arc transition to form an arc-shaped folded plate structure. The bending angle and the height of the first vibrator plate 21 and the second vibrator plate 22 are adjusted to realize the bending of the sheet, so that the bending rigidity of the sheet can be reduced in a limited space, the working frequency of the vibrator plate 2 is limited to be reduced, the working frequency and the acting direction can be adjusted by changing the bending direction and the bending angle of the first vibrator plate and the second vibrator plate, and the vibration suppression function of low resonant frequency and multiple resonant directions is realized on the whole. The number of the first vibrator plate 21 and the second vibrator plate 22 in the vibrator plate 2 can be plural, as shown in fig. 3, the vibrator plate 2 of a step-shaped multi-stage bent plate structure can be formed by two first vibrator plates 21 and two second vibrator plates 22, and the vibrator plate can be connected with the second vibrator plate 22 after the first vibrator plates 21 form a curved bent shape, and of course, the second vibrator plate 22 can also be connected with one or more first vibrator plates 21 to form a corresponding shape after the second vibrator plate 22 is formed into a plurality of curved bent shapes or other configurations. In addition, the second oscillator plate 22 may have a gradual change configuration, as shown in fig. 4a-4c, and may gradually widen or narrow from one end to the other end, or regularly widen or narrow from both ends to the middle, etc., so as to effectively widen the operating frequency band.

The plurality of vibrating plates 2 are connected to the clamping opening 131 in a symmetrical manner, specifically, the first vibrating plate 21 is connected to the side of the clamping opening 131, the connection manner can be that the end face of the free end of the first vibrating plate 21 departing from the second vibrating plate 22 is connected to the end face of the side of the clamping opening 131, the second vibrating plate 22 enters the shell 1 within the side of the clamping opening 131, namely, the second vibrating plate 22 is located between the inner surface of the top plate 11 and the inner surface of the bottom plate 13, and the vibrating plates 2 are basically and completely located in the shell 1 in such a connection manner. The connection mode that the first oscillator plate 21 is connected to the side of centre gripping mouth 131 still can be for the terminal surface that the first oscillator plate 21 deviates from the free end of second oscillator plate 22 to be located outside centre gripping mouth 131, and the side of centre gripping mouth 131 is connected with the face of first oscillator plate 21, and the part of first oscillator plate 21 is located outside centre gripping mouth 131, and second oscillator plate 22 still places between roof 11 internal surface and bottom plate 13 internal surface, and the part of board 2 that shakes promptly is located casing 1, and the part is located outside casing 1. Under two kinds of connection circumstances, first oscillator board 21 is connected in centre gripping mouth 131 department, mainly for with wait to vibrate the component direct contact who suppresses, be convenient for direct transmission vibration power, no matter simultaneously shake board 2 and basically all be located casing 1, still partly be located casing 1, second oscillator board 22 as the main resonant structure of low frequency suppression effect all is located casing 1 to ensure the protection to casing 1 to the resonant structure, reduce the influence of external force. Because the vibration plate has higher parameter sensitivity, the vibration plate is exposed outside and is easily influenced by external force to deform, so that the designed frequency is deviated, and a closed or semi-closed vibration suppression structure is formed by wrapping the shell, so that the design frequency accuracy of the resonance structure can be effectively ensured.

Example 2

The embodiment 2 is formed on the basis of the embodiment 1, and the vibration suppression performance of the vibration suppression structure is improved through the optimized design of the whole structure of the vibration plate connected to the shell. Specifically, the method comprises the following steps:

as shown in fig. 1 to 7, the vibrating plates 2 connected to each side of the holding opening 131 are plural and spaced apart, preferably, spaced apart side by side, that is, the second vibrator plates 22 are spaced apart from each other. The vibrating plates 2 on opposite sides of the clamping opening 131 are preferably symmetrically arranged in number and configuration. A plurality of vibrating plates 2 may be provided side by side on each side of the clamping opening 131.

As a modified structure, a plurality of parallel vibration fins 221 are formed on the second vibrator plate 22 in a slit form, and the plurality of parallel vibration fins 221 may correspond to a plurality of second vibrator plates 22 arranged side by side, in which case the vibration plates 2 are integrally formed by a process such as die pressing, that is, only one vibration plate 2 may be connected to each of the opposite sides of the clamping opening 131, and the number of vibration plates 2 may be greatly reduced. The vibration plates 2 with the vibration fins 221 can be arranged in parallel on the side of the clamping opening 131, so that the number of vibration plates 2 connected to the housing 2 can be reduced, and the vibration suppression performance can be improved by improving the structural stability.

Example 3

In embodiment 3, the overall operating frequency of the vibrating plate is reduced and the low-frequency vibration suppression effect is improved by optimizing the design of the vibrating plate with respect to the overall structure of the second vibrating plate, based on embodiment 1 or embodiment 2. Specifically, the method comprises the following steps:

as shown in fig. 1 to 7, the second vibrator plate 22 is provided with a plurality of first micro holes 222, preferably, the plurality of first micro holes 222 are uniformly distributed on the second vibrator plate 22, and when the second vibrator plate 22 is provided with a plurality of vibration fins 221, the first micro holes 222 are distributed on the vibration fins 221. The second vibrator plate 22 is provided with the first micro-holes 221, so that the bending rigidity of the second vibrator plate 22 can be further adjusted, and the overall working frequency of the vibrator plate can be further reduced.

Further preferably, the mass block 3 is arranged on the second vibrator plate 22, and the mass block 3 and the second vibrator plate 22 form a main resonance structure of the vibrator plate 2, so that the overall working frequency of the vibrator plate 2 can be effectively limited and reduced. The size and shape of the mass block 3 are mainly determined according to the vibration suppression frequency required by the vibration plate 2. The position where the mass block 3 is connected to the second vibrator plate 22 may be an upper surface or a lower surface, and may be connected to the second vibrator plate 22 by gluing, riveting, welding, or the like, or may be integrally formed with the second vibrator plate 22.

Example 4

The embodiment 4 is formed on the basis of any one of the embodiments 1 to 3, and the working frequency band of the vibration suppressing structure is widened by forming a closed vibration suppressing structure for the vibration plate connected in the shell and taking measures such as further filling and the like for the closed vibration suppressing structure. Specifically, the method comprises the following steps:

as shown in fig. 1 to 7, after the vibration plate 2 is connected to the side of the clamping opening 131 formed in the bottom plate 13, the sealing plate 4 and the plurality of first vibration plates 21 are connected to form a closed cavity structure, so that the second vibration plate 22 is closed and connected to the inside of the housing 1. Specifically, the connection mode of the sealing plate 4 and the plurality of first oscillator plates 21 mainly includes two types: one way is that when the end of the first vibrator plate 21 extends to the outside of the bottom plate 13 of the housing 1, the end of each first vibrator plate 21 is hermetically connected with the sealing plate 4 to form a bump structure protruding out of the housing 1, and the bump structure can be used for inserting into a component to be vibration-suppressed for vibration suppression; another way is that the sealing plate 4 enters a certain distance from the clamping opening 131 and is hermetically connected with the first vibrator plate 21 located above the clamping opening 131 to form a groove structure, and at this time, whether the end of the first vibrator plate 21 is located outside the housing 1 or not can adopt such a connection way to form a groove structure, and the groove structure can be used for clamping a component to be vibration-suppressed to perform vibration suppression. In both sealing connection modes, not only the vibration can be directly transmitted to the vibrating plate 2, but also the second vibrating plate 22 is sealed in the shell 1.

After the second vibrator plate 22 is enclosed in the housing 1, a plurality of second micro holes 111 may be formed in the top plate 11 of the housing 1, and the second micro holes 111 are preferably uniformly distributed on the top plate 11. The top plate of the shell is provided with the holes, and then the distance between the top plate 11 and the second vibration plate 22 is designed, if the second vibration plate 22 is provided with the mass block 3, the distance between the top plate and the mass block is considered, so that radiation damping can be introduced by means of extrusion friction of air during vibration, and the working frequency band of the vibration suppression structure is widened.

After the second vibration plate 22 is sealed in the housing 1, a further optimized way of widening the working frequency band of the vibration suppressing structure is to fill the sealed housing 1 with damping material, and improve the damping of the whole vibration suppressing structure by the viscous damping effect generated by the damping material when the second vibration plate 22 vibrates, thereby widening the working frequency band of the vibration suppressing structure. Preferably, the filled damping material is foam, cotton, fiber, liquid such as mineral oil, or the like. When the damping material is foam, mineral oil, or the like, the top plate 11 is not provided with the second micro-holes 111 to prevent the liquid from leaking. When filled with a damping material, particularly a liquid, the second vibrator plate 22 is preferably provided with first micro-holes 222, so that the viscous damping effect is further enhanced by the porous effect.

Example 5

This embodiment 5 is formed on the basis of any one of embodiments 1 to 4, and the housing and the vibrating plate are integrally formed, so as to avoid the problem of falling off due to the loose connection of the components and ensure the vibration suppressing effect of the vibration suppressing structure. Specifically, the method comprises the following steps:

as shown in fig. 1 to 7, the vibration suppressing structure may be integrally formed by an integral forming process, such as by compression molding with a corresponding mold, or by cutting and bending the plate-shaped material on a numerical control machine several times by a dedicated cutting and sheet metal device, to form a complete integral structure including the vibration plate of the mass block, the sealing plate, and the housing, as shown in fig. 5.

Test results

The vibration test was conducted by taking the vibration suppressing structure as an example, as shown in fig. 6, a vibration suppressing structure was provided on the pipeline, and the pipeline was supported by two supports and fixed to the ground. Point A shown in the figure is an excitation point, a vibration exciter provides a white noise signal of 0Hz-1600Hz as a vibration source input, and a force sensor is arranged at the joint of the output end of the vibration exciter and the pipeline and used for picking up an excitation force signal input into the pipeline by the vibration exciter; and the point B is a response point, is positioned at the far end of the pipeline and is used for picking up an acceleration response signal by an acceleration sensor.

Fig. 7 is a graph showing the amplitude result of the vibration transfer function FRF (frequency Response function) before and after the installation of the vibration suppressing structure for the pipeline structure shown in fig. 6, and the vibration suppressing effect of the vibration suppressing structure is evaluated by using the FRF represented by the acceleration amount, and the calculation method is as follows:

where a represents the vertical acceleration of the response point B and F represents the input force of the excitation point a.

In fig. 7, the broken line represents the FRF test result of the 1mm thick aluminum pipe without the vibration suppressing structure, and the solid line represents the case after the vibration suppressing structure described in the first embodiment is attached. It is evident that the vibration amplitude delivered to the response point is reduced at the low frequency design frequency (190Hz-265 Hz, bandwidth 75Hz) after the vibration suppressing structure is installed. By using the vibration suppression structure in the first embodiment, the vibration transfer function amplitude of the pipeline can be averagely reduced by about 20dB in the frequency band, and the vibration suppression effect of the vibration suppression structure is embodied.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.