KR101292397B1 - Oscillating wave absorber of multi-wavelength - Google Patents

Abstract

PURPOSE: A multi-waves section earthquake waves absorbing pad improving vibration isolation performance and vibration control performance is provided to effectively perform vibration proof performance by effectively absorbing different natural frequencies for each mounted object. CONSTITUTION: A multi-waves section earthquake waves absorbing pad (10) improving vibration isolation performance and vibration control performance comprises a core unit (100) and a shell unit (200). The core unit is formed in a hexahedron by laminating a plurality of boards (120,140,160) over three layers. The core unit is comprised of materials including different natural frequencies. The shell unit is integrally formed by sealing and enclosing six sides of the core unit and includes a thick of 3-10 mm ranges. The shell unit is comprised of a polyurethane material including density of 120-800 kg/m^3.

Description

Multi-wavelength wave vibration absorbing pad improves vibration isolation and vibration damping performance {OSCILLATING WAVE ABSORBER OF MULTI-WAVELENGTH}

The present invention relates to a vibration wave absorption pad, and more particularly, to a multi-wavelength region vibration wave absorption pad using friction to improve vibration isolation and vibration damping performance.

Many researches have been conducted on dustproof members to absorb noise generated from various power generation facilities (hereinafter referred to as "objects"), as well as vehicle engine rooms and railway vehicles, as well as noise prevention of various residential facilities such as apartment houses. Has been done.

Vibration is considered to be a comprehensive concept of vibration absorption including the concept of earthquake-proof, vibration-proof, and seismic-proof, but it is a concept to effectively counteract vibrations acting on an object by increasing the strength and toughness of the member.

In addition, base isolation is a concept that avoids mutual resonance by designing to avoid the natural frequency band of the object by using the characteristics of vibration.

In addition, vibration is a concept of reducing vibration by sensing vibration applied to an object or adjusting the stiffness or damping force of the object according to the characteristics of the input vibration.

On the other hand, as a vibration wave absorbing pad for dustproof of the object, conventionally appeared to use the finishing material added to the foam, glass fibers, fiber felt, urethane foam.

However, in this case, there is an advantage that the manufacturing is easy due to the simple structure and low cost, but it was difficult to effectively absorb the vibration wave of the object in various wavelength ranges.

Disclosure of Invention An object of the present invention is to provide a multi-wavelength vibration wave absorbing pad capable of effectively absorbing different natural frequencies for each object to be mounted to effectively implement a dustproof function.

In addition, an object of the present invention is to provide a multi-wavelength region vibration wave absorption pad made of a single plate shape excellent in workability and does not reduce the effect even in wet construction.

In addition, an object of the present invention is to provide a multi-wavelength region vibration wave absorption pad which is formed to enable friction between the plates within the vibration wave absorption pad, thereby improving vibration and vibration damping functions by allowing vibration energy to be consumed by frictional heat. It is done.

The present invention is a core-shaped core portion formed by laminating a plurality of plate material; And a shell part surrounding the core surface of the core part, wherein the core part provides a multi-wavelength region vibration wave absorbing pad, which is formed to enable friction between the laminated plates.

The shell portion is preferably formed of a polyurethane material.

At this time, the polyurethane constituting the shell portion preferably has a density of 120 ~ 800 kg / ㎥, it is more preferable that the thickness of the shell portion is formed in the range of 3 ~ 10mm. The use of polyurethane is because the density of the shell can be adjusted in a wide range depending on the characteristics of the installation site.

The core part is formed by stacking a plurality of plate materials in three or more stages, and adjacent plate materials are preferably made of materials having different natural frequencies.

In addition, the individual plate constituting the core portion, a material in which any one or two or more of metal, wood, ceramic, synthetic resin, polymer resin, rubber may be used.

The core portion is formed by laminating an odd number of plate materials, and more preferably the same material is stacked up and down based on the center plate material.

In addition, the plate may be provided with a friction projection for increasing the friction on the surface friction with the adjacent plate.

On the other hand, the plate forming the core portion may include a functional plate containing an electromagnetic wave blocking function or a heat insulating function.

In addition, the present invention includes a hexahedral-shaped core portion formed by stacking a plurality of plate materials and a shell portion surrounding the core surface of the core portion, wherein the core portion is formed of a multi-wavelength region vibration wave absorbing pad formed to enable friction between the laminated plates. As a method for manufacturing the adjacent plate material to form the core part by laminating the plate material to have a different natural frequency, then seating the core part in the mold, foaming polyurethane on the outer peripheral surface of the core part to form a shell part It provides a multi-wavelength region vibration wave absorption pad manufacturing method characterized in that.

According to the present invention, in consideration of different natural frequencies for various mounting objects, such as buildings or generators, there is an advantage that can effectively absorb the vibration wave of the wavelength compared to the simple structure to implement a dustproof function.

In addition, the present invention is easy to manufacture in a simple structure is formed in the form of a single plate has the effect of easy construction.

In addition, the present invention can be carried out by selecting a variety of materials of the core portion for each natural frequency of the mounting object metal, wood, plastic, polymer material, it can be applied to various soundproofing facilities as well as buildings, power generation equipment. It has an effect.

1 is a view showing a schematic view of a multi-wavelength region vibration wave absorption pad according to a first embodiment of the present invention;
2 is a cross-sectional view of a multi-wavelength region vibration wave absorption pad according to a first embodiment of the present invention;
3 is a longitudinal sectional view of a multi-wavelength region vibration wave absorption pad according to a first embodiment of the present invention;
4 is a longitudinal cross-sectional view of a multi-wavelength region vibration wave absorption pad according to a second embodiment of the present invention;
5 is a view schematically showing a manufacturing process of a multi-wavelength region vibration wave absorption pad according to the present invention.

Hereinafter, a preferred embodiment of a multi-wavelength vibration wave absorption pad and a method of manufacturing the same according to the present invention will be described.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. However, the present invention is not limited by the embodiments disclosed below but may be embodied in various different forms. The embodiments to be described herein are merely provided to make the disclosure of the present invention complete, and to fully convey the scope of the present invention to those skilled in the art.

In addition, in the description of the present invention, if it is determined that related related art and the like may obscure the gist of the present invention, detailed description thereof will be omitted.

In the following embodiments, "vibration" refers to shaking, which occurs periodically or non-periodically on the basis of the equilibrium position in a building or various mechanical devices and the like (hereinafter referred to as "object"). The term "wave" refers to the concept of waves. That is, each oscillation wave has its corresponding wavelength (or frequency).

In particular, the vibration of a mechanical device (e.g., an engine or a generator) may include vibrations generated from various valve actuations as well as vibrations generated in the main body of the device as well as vibrations caused by moments of inertia in kinematic motion of the power transmission system. Expressed in form. Vibration in the machine exerts a constant fatigue load on the device, and consequently acts as a cause of deterioration and quality degradation of the device.

On the other hand, the vibration generated in the building, etc. generate noise, for example, the floor noise. This acts as a source of extreme stress for the residents.

Therefore, the present invention was devised to implement a function of effectively absorbing and dust-proofing vibration waves in a multi-wavelength region that can be propagated to an object in order to prevent adverse effects due to vibration.

1 is a view showing a schematic view of a multi-wavelength region vibration wave absorption pad according to a first embodiment of the present invention, Figure 2 is a cross-sectional view of a multi-wavelength region vibration wave absorption pad according to a first embodiment of the present invention 3 is a longitudinal cross-sectional view of a multi-wavelength region vibration wave absorption pad according to a first embodiment of the present invention.

1 to 3, the multi-wavelength region vibration wave absorbing pad 10 according to the present invention integrally surrounds a hexahedral core part 100 formed by stacking a plurality of plate members, and the six sides of the core part. It includes a shell portion 200 formed.

Referring to FIG. 2, the shell part 200 not only surrounds all four sides of the core part 100, but referring to FIG. 3, the shell part 200 surrounds the upper and lower surfaces of the core part 100.

That is, the shell part 200 is formed to enclose the entire six sides of the core part 100 as if it were sealed.

As illustrated in FIG. 2, the core part 100 has a form in which three plate members 120, 140, and 160 are stacked.

The core part 100 is formed by laminating an odd number of plate members, and the same material is stacked up and down based on the center plate member 140.

The core part 100 is composed of an odd number, and formed in a vertically symmetrical form is difficult to identify the top and bottom in appearance, and has the effect of always having a uniform stacking order even if the construction does not distinguish between the top and bottom.

The multi-wavelength region vibration wave absorbing pad 10 according to the present invention may be constructed adjacent to a plurality of adjacent wave-like absorbent pads as if a tile is installed on a wall or a bottom surface, when the adjacent multi-wave absorber has a different layered structure. Because.

The core parts 100 are not attached to each other, but are simply laminated so as to have a state in which friction between the laminated sheets is possible.

In addition, the core part 100 is made of a material having adjacent natural materials having different natural frequencies.

Such a structure causes friction to occur between adjacent plates when vibration is transmitted to the core part 100, thereby bringing an effect of consuming vibration with friction energy.

The individual plate constituting the core part 100 may use a material in which any one or two or more of metal, wood, ceramic, synthetic resin, polymer resin material, and rubber are combined. Due to the difference in materials, it is possible to have different natural frequencies.

Here, the plate may be a plate-like material, and the plate is not limited to the one having a solid rectangular parallelepiped. For example, an air cap having an air layer between synthetic resin films can also be used as the sheet of the present invention.

In the case of synthetic resin, EVA (Ethylene-vinyl acetate) can be used. Here, EVA is collectively called an ethylene vinyl acetate resin or an ethylene vinyl acetate copolymer, and refers to a polymer obtained by copolymerizing ethylene and a vinyl acetate monomer.

The EVA material is a material that increases the density as the content of vinyl acetate increases, but the crystallinity is lowered and the flexibility is increased. That is, the degree of hardness may vary depending on the content of vinyl acetate.

In the case of metal, it may be used for dust-proofing in a specific frequency band, and may be laminated in the form of a thin plate for the purpose of additional functionality such as electromagnetic wave blocking.

As described above, the core unit 100 is simply stacked, and there is no need to consider adhesion between materials and the like, and a plate material for the dustproof effect of a desired frequency band may be selected and stacked according to the characteristics of the construction site.

In addition, each plate constituting the core portion 100 is selected to have a natural frequency different from the natural frequency of the shell portion 200. It is not necessary to oscillate the frequency of the overlapping region, which is to prevent the phenomenon of resonance with the natural frequency of the object.

The core unit 100 may further include a tape (not shown) attached to the side of the laminated sheet. The tape is intended to maintain the stacked state of the core part 100 before the core part 100 is sealed by the shell part 200, and may be attached to the entire side surface or partially attached.

Shell portion 200 is formed integrally with the whole, and has a structure that wraps in the form of sealing the core portion (100).

This structure merely has a lamination, and has an effect of protecting the core portion 100 that is not bonded, and is intended to maintain the vibration damping performance due to friction even in the wet construction.

The shell portion 200 is formed of a polyurethane material, wherein the polyurethane preferably has a density of 120 ~ 800 kg / ㎥. When the density of the polyurethane is less than the above range, the strength is weak and the dustproof effect is small, and when the density exceeds the above range, the weight and the cost increase.

Polyurethane is a generic material for a polymer having a urethane bond, and generally can be obtained by addition polymerization of diisocyanate and glycol. In particular, the foamed urethane produced by the polymerization and the foaming reaction can effectively absorb the vibration wave in the high frequency region in the present invention, and is a material widely used as a sound insulation.

As shown in FIG. 3, the shell part 200 has a side thickness t1 and a top and bottom thickness t2.

The side thickness t1 and the top and bottom thickness t2 are preferably in the range of 3 to 10 mm, and the side thickness t1 and the top and bottom thickness t2 are preferably at a similar level. This has the advantage of uniformly forming the side and top and bottom of the core portion 100 in terms of the quality of the foam molding.

If the thickness is less than 3 mm, the strength is weak and there is a risk of breakage. If the thickness is more than 10 mm, the molding becomes long and the productivity decreases.

4 is a longitudinal sectional view of a multi-wavelength region vibration wave absorption pad according to a second embodiment of the present invention.

The second embodiment shows a case in which the core part 100 is composed of five layers, so that the whole has seven layers.

The number of stacks of the core part 100 may be selected according to the installation target, but is preferably stacked in three or more stages.

In addition, the second embodiment has a form in which the first plate (120,160) and the second plate (130,150) is provided with the projections 122, 132, 152, 162 meshed with each other.

When the plate facing each other is provided with the projections 122, 132, 152, 162 meshed with each other, the friction area is increased to increase the vibration damping effect due to friction.

The plate may include a functional plate for imparting additional functionality to the multi-wavelength vibration wave absorption pad. The functional plate may be a metal thin plate having an electromagnetic wave blocking function, an insulating plate for insulating effect, or the like.

In addition, the protrusions 122, 132, 152, 162 simply adds a clamping force between the laminated plate to bring the effect of preventing the plate from slipping off during the manufacturing process.

5 is a view schematically showing a manufacturing process of a multi-wavelength region vibration wave absorption pad according to the present invention.

As shown in the drawing, the plate member is laminated to form the core part 100, and then seated on a mold having the molding groove 22. At this time, the guide pin 24 protrudes from the mold 20 so that the core part 100 maintains the position spaced apart from the inner surface of the mold.

In this state, the core part 100 is fixed at a position spaced apart from the molding groove 22 by the thickness of the shell part 200, and at this time, the poly part is spaced between the molding groove 22 and the core part 100. After foaming and injecting urethane, when the curing of the injected polyurethane is completed, it is produced by separating from the mold.

The core unit 100 may be attached to the side of the tape to maintain the stacked state of the plate material to maintain the laminated state stably.

In the above, various embodiments of the multi-wavelength vibration wave absorption pad according to the present invention have been described.

The described embodiments are to be considered in all respects only as illustrative and not restrictive, and the scope of the present invention will be indicated by the following claims rather than the foregoing detailed description. And it is to be construed that all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof are included in the scope of the present invention.

10: multi-wavelength vibration wave absorption pad
20: mold
22: molding groove
24: guide pin
100 core part
120, 160: first plate
140: center plate
130, 150: second plate
200: shell portion

Claims (10)

In the vibration absorbing pad is installed on the wall or floor,
A plurality of plate material is formed by stacking in three or more stages, adjacent plate material is a cube-shaped core portion 100 made of a material having a different natural frequency; and
It is wrapped in the form of sealing the core portion of the core, and formed of a polyurethane material having a density of 120 ~ 800kg / ㎥ and shell portion having a thickness in the range of 3 ~ 10mm;
The core part is formed by laminating an odd number of plate materials, and is formed to enable friction between the laminated plate materials, the same material is laminated up and down based on the center plate material. And a portion of the plate includes a friction protrusion for increasing friction on a surface rubbing with an adjacent plate.
delete delete delete delete The method of claim 1,
The individual plate constituting the core portion,
Multi-wavelength region vibration wave absorption pad, characterized in that any one or two or more of metal, wood, ceramic, synthetic resin, polymer resin, rubber.
delete delete The method of claim 1,
The plate forming the core portion
A multi-wavelength region vibration wave absorbing pad comprising a functional plate having an electromagnetic wave blocking function or an insulating function.
It comprises a hexahedral-shaped core portion formed by stacking a plurality of plate material and a shell portion surrounding the core surface of the core portion, wherein the core portion is formed to enable friction between the laminated plate material, a portion of the plate material to friction with the adjacent plate material A method for manufacturing a multi-wavelength region vibration wave absorbing pad having friction projections for increasing frictional force on a surface thereof and constructed on a wall surface or a bottom surface,
After stacking at least three or more odd-numbered plate material, the same material is stacked up and down on the basis of the center plate material, and laminated the plate material so that adjacent plate material has a different natural frequency to form the core portion,
The core portion is seated inside the mold, and foamed to have a density of 120 ~ 800kg / ㎥ polyurethane on the outer peripheral surface of the core portion to form a shell portion surrounding the core portion in the form of sealing to form a shell Vibration wave absorption pad manufacturing method.

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