CN212509318U

CN212509318U - Particle damper

Info

Publication number: CN212509318U
Application number: CN202020999005.0U
Authority: CN
Inventors: 刘新刚
Original assignee: Shanghai Chaoyin Acoustics Technology Co ltd
Current assignee: Shanghai Chaoyin Acoustics Technology Co ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2021-02-09
Anticipated expiration: 2030-06-03

Abstract

The utility model discloses a particle damper, it includes casing, elastomer and damping granule, and the elastomer is established in the casing, has the space between elastomer and the casing, and the damping granule is established in the elastomer and/or the damping granule is established in the space. The utility model discloses a particle damper is equipped with the damping granule in the inside space of casing and elastomer because the inside elastomer that has set up of casing, elastomer, and when external vibration transmitted to damping particle damper, the elastomer can enlarge the vibration between the damping granule, makes between the damping granule, between damping granule and the casing and between damping granule and the elastomer through efficient friction dissipation vibration energy, has realized the full frequency channel damping function that begins from the low frequency. In addition, the existence of the elastomer reduces the using amount of the damping particles, so that larger friction energy consumption can be obtained under the condition of arranging a small amount of the damping particles. The particle damper has small self weight and wide application range.

Description

Particle damper

Technical Field

The utility model relates to a damping technical field especially relates to a particle damper.

Background

Structural resonance can occur on a large rigid structure (such as a bridge, a steel rail, a vehicle and the like) at a lower frequency, the vibration energy of the structure is larger, but the energy consumption of the structure is very small, so that the vibration hazard can occur on a resonance peak. In order to avoid such a vibration hazard, a damper needs to be provided on the rigid structure. After the traditional damping material (such as a damping piece of rubber damping and the like) is attached to the structure, the vibration of the structure with higher frequency can be well inhibited, but the effect of inhibiting the vibration below 200Hz is weaker. In addition, the traditional damping material is influenced by temperature illumination and the like, so that the weather resistance is poor, and the service life is short. The particle damper generates energy consumption through mutual friction of hard particles placed inside the damper, and can generate a larger damping effect when being installed on the structure, but the existing particle damper is poor in low-frequency vibration suppression effect, large in self weight, inconvenient to install and narrow in application range.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a particle damper, this particle damper's dead weight is less to can begin to realize the wide band damping effect from lower frequency channel.

For realizing the technical effect, the utility model discloses a particle damper's technical scheme as follows:

the utility model discloses a particle damper, include: a housing; the elastic body is arranged in the shell, and a gap is formed between the elastic body and the shell; damping particles disposed within the elastomer and/or within the voids.

In some embodiments, the elastomer comprises: the hollow structure is internally provided with the damping particles; and one end of the connecting piece is connected to the hollow structure, and the other end of the connecting piece is connected to the inner side wall of the shell.

In some optional embodiments, the hollow structure is a cuboid, at least one side wall of the cuboid is formed as a first grid plate, and grid gaps of the first grid plate are smaller than the particle size of the damping particles.

In some optional embodiments, the elastic body is a plurality of elastic bodies, and the plurality of elastic bodies are arranged at intervals along the length direction of the shell.

In some embodiments, the elastomer comprises: the horizontal part is arranged at intervals with the top wall of the shell; the vertical portion, vertical portion is two, every the one end of vertical portion with the horizontal part links to each other, the other end with the diapire of casing links to each other.

In some alternative embodiments, at least one of the horizontal portion and the vertical portion is formed as a second grid plate having grid voids smaller than a particle size of the damping particles.

In some alternative embodiments, one end of the vertical part, which is far away from the horizontal part, is provided with a connecting flange, and the connecting flange is connected to the bottom wall of the shell.

In some embodiments, the elastomer is any one of a steel wire rope, an elastic mesh, or a foam piece.

In some embodiments, the housing comprises: the box body is arranged at one end of the box body in an open mode; the lid, the lid lock is in the open end of box body and with the connection can be dismantled to the box body.

In some embodiments, the damping particles are any one or at least two of metal particles, plastic particles, glass particles, ceramic particles, sand particles, stone particles.

The utility model discloses a particle damper, because the inside elastomer that has set up of casing, be equipped with the damping granule in the inside space of reaching casing and elastomer of elastomer, when external vibration transmits to damping particle damper, the elastomer can enlarge the vibration between the damping granule, makes between the damping granule, between damping granule and the casing and between damping granule and the elastomer through efficient friction dissipation vibration energy, has realized the full frequency channel damping function that begins from the low frequency. In addition, the existence of the elastomer reduces the consumption of damping particles, so that larger friction energy consumption can be obtained under the condition of arranging a small amount of damping particles; the particle damper has small self weight and wide application range.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of a particle damper according to a first embodiment of the present invention.

Fig. 2 is an exploded view of the particle damper according to the second embodiment of the present invention for removing damping particles.

Fig. 3 is an exploded view of the particle damper according to the third embodiment of the present invention for removing damping particles.

FIG. 4 is a line graph of experimental results of vibration transfer functions of the particle damper of the third embodiment mounted and the particle damper not mounted.

Fig. 5 is an exploded view of a particle damper according to a fourth embodiment of the present invention for removing damping particles.

Fig. 6 is an exploded schematic view of a particle damper according to a fifth embodiment of the present invention for removing damping particles.

Reference numerals:

1. a housing; 11. a box body; 12. a cover body; 2. an elastomer; 21. a hollow structure; 22. a connecting member; 23. a horizontal portion; 24. a vertical portion; 241. connecting the flanging; 3. damping the particles.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

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, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 specific structure of the particle damper according to the embodiment of the present invention will be described with reference to fig. 1 to 5.

As shown in fig. 1-5, the particle damper of the present invention comprises a housing 1, an elastic body 2 and damping particles 3, wherein the elastic body 2 is disposed in the housing 1, a gap is formed between the elastic body 2 and the housing 1, and the damping particles 3 are disposed in the elastic body 2 and/or the damping particles 3 are disposed in the gap.

It can be understood that, when the particle damper of the present embodiment is installed on a vibration damping object, external vibration energy generated by the vibration damping object is transmitted to the interior of the particle damper through the shell 1, so that large relative motion amplitude is generated between the damping particles 3 in the interior of the particle damper, between the damping particles 3 and the shell 1, and between the damping particles 3 and the elastic body 2, and partial vibration energy is dissipated through collision and friction in the interior of the damper, thereby achieving the vibration damping effect of the particle damper. Meanwhile, the elastic body 2 can also amplify the vibration amplitude of the particles and increase the low-frequency damping effect, so that the particle damper of the embodiment can better inhibit high-frequency vibration and low-frequency vibration, and the application range of the particle damper is widened. In addition, because the elastic body 2 is arranged in the shell 1, and the elastic body 2 can amplify the vibration amplitude of the particles, under the condition of achieving the same vibration reduction effect, the particle damper of the embodiment has smaller self weight, and the application range of the particle damper is further expanded.

The utility model discloses a particle damper, because casing 1 is inside to be set up elastomer 2, be equipped with damping granule 3 in elastomer 2 inside and casing 1 and elastomer 2's the space, when vibration transmission to damping granule 3, vibration between damping granule 3 can be enlargied to elastomer 2, make between the damping granule 3, between damping granule 3 and the casing 1 and between damping granule 3 and the elastomer 2 through friction dissipation vibration energy, realized the full frequency channel damping function that begins from the low frequency. In addition, the existence of elastomer 2 has reduced the quantity of damping granule 3, obtains great friction power consumption under setting up a small amount of damping granule 3 circumstances for particle damper's dead weight descends, thereby makes particle damper's application scope wider.

In some embodiments, the elastic body 2 includes a hollow structure 21 and a connection member 22, the hollow structure 21 is provided with the damping particles 3 therein, and one end of the connection member 22 is connected to the hollow structure 21 and the other end is connected to the inner sidewall of the housing 1. It can be understood that the hollow structure 21 is connected to the housing 1 through the connecting member 22, so that the hollow structure 21 is suspended inside the housing 1, the contact area between the elastic body 2 and the damping particles 3 can be increased, and the vibration damping effect is improved.

In some alternative embodiments, the hollow structure 21 is a cuboid, at least one side wall of which is formed as a first grid plate, the grid voids of which are smaller than the particle size of the damping particles 3. It can be understood that the side wall of the hollow structure 21 is formed as a grating plate to increase the damping particles 3 inside the elastic body 2 and the damping particles 3 in the gap between the elastic body 2 and the shell 1, thereby improving the vibration damping effect of the particle damper. In addition, the hollow structure 21 is a cuboid, so that the elastic body 2 has elastic action in six directions, and the particle damper of the embodiment can be suitable for multi-directional vibration reduction, thereby further expanding the application range of the particle damper.

In some alternative embodiments, the elastic body 2 is a plurality of elastic bodies 2, and the plurality of elastic bodies 2 are arranged at intervals along the length direction of the shell 1. Therefore, the vibration reduction effect of the particle damper can be further improved.

In some embodiments, the elastic body 2 includes a horizontal portion 23 and two vertical portions 24, the horizontal portion 23 is spaced apart from the top wall of the housing 1, and one end of each vertical portion 24 is connected to the horizontal portion 23 and the other end is connected to the bottom wall of the housing 1. It can be understood that the elastic body 2 is formed into a U-shaped structure, the overall weight of the particle damper can be further reduced, the elasticity of the U-shaped structure is better, and the vibration reduction effect at a low frequency is better.

In some alternative embodiments, at least one of the horizontal portion 23 and the vertical portion 24 is formed as a second grating plate having grating voids smaller than the particle size of the damping particles 3. It is understood that the formation of the grating plates in the horizontal part 23 and the vertical part 24 can increase the damping particles 3 inside the elastic body 2 and the damping particles 3 in the gap between the elastic body 2 and the housing 1, thereby improving the vibration damping effect of the particle damper.

In some alternative embodiments, the end of the vertical portion 24 away from the horizontal portion 23 is provided with a connecting flange 241, and the connecting flange 241 is connected to the bottom wall of the housing 1. Therefore, the connection stability of the elastic body 2 and the shell 1 can be ensured, and the phenomenon that the vibration reduction effect of the particle damper is reduced due to the fact that the elastic body 2 falls off in the shell 1 is avoided.

Of course, it should be additionally noted that, in other embodiments of the present invention, the elastic body 2 is any one of a steel wire ball, an elastic net or a foam member. The shape, number, distribution and connection to the housing 1 of the elastic bodies 2 can be selected according to actual needs.

In some embodiments, the housing 1 includes a box 11 and a cover 12, wherein one end of the box 11 is open, and the cover 12 is fastened to the open end of the box 11 and detachably connected to the box 11. Therefore, in the actual use process, the cover body 12 can be opened and the number of the damping particles 3 can be increased or decreased, so that the number of the damping particles 3 of the particle damper can be increased or decreased according to actual needs, and the vibration damping effect of the particle damper on different vibration damping devices is improved.

In some embodiments, the damping particles 3 include any one or at least two of metal particles, plastic particles, glass particles, ceramic particles, sand particles, stone particles.

Particle dampers of four specific embodiments of the present invention are described below with reference to fig. 1-4.

The first embodiment is as follows:

as shown in fig. 1, the particle damper of the present embodiment includes a housing 1, an elastic body 2, and damping particles 3, the elastic body 2 being provided in the housing 1, the elastic body 2 and the housing 1 having a gap therebetween, the damping particles 3 being provided in the gap and inside the elastic body 2. The elastic bodies 2 are two, and the two elastic bodies 2 are arranged at intervals.

Example two:

as shown in fig. 2, the particle damper of the present embodiment includes a housing 1, an elastic body 2, and damping particles 3, the elastic body 2 being provided in the housing 1, a gap being provided between the elastic body 2 and the housing 1, the damping particles 3 being provided in the gap. The elastic body 2 comprises a hollow structure 21 and a connecting piece 22, wherein damping particles 3 are arranged in the hollow structure 21, one end of the connecting piece 22 is connected to the hollow structure 21, and the other end of the connecting piece is connected to the inner side wall of the shell 1. The hollow structure 21 is a cuboid, and four side walls of the cuboid form a grid plate.

Example three:

as shown in fig. 3, the particle damper of the present embodiment includes a housing 1, an elastic body 2, and damping particles 3, the elastic body 2 being provided in the housing 1, a gap being provided between the elastic body 2 and the housing 1, the damping particles 3 being provided in the gap. The elastomer 2 includes horizontal part 23 and vertical portion 24, and horizontal part 23 sets up with the roof interval of casing 1, and vertical portion 24 is two, and the one end of every vertical portion 24 links to each other with horizontal part 23, and the other end is equipped with the connection turn-ups 241 that links to each other with the diapire of casing 1.

Specifically, fig. 4 is an amplitude test result of a vibration transfer function FRF (frequency Response function), and the vibration reduction effect of the particle damper is evaluated by using the FRF represented by an acceleration amount, and the calculation method is as follows:

in the formula, A represents the vertical acceleration of the response point, and F represents the input force of the excitation point.

In fig. 4, the broken line represents the transfer function when the particle damper is not mounted, and the solid line represents the case when the particle damper of the present embodiment is mounted. The horizontal axis represents frequency in Hz and the vertical axis represents amplitude in dB. When the particle damper was installed, the peak of each peak was significantly attenuated starting from the low frequency of 50Hz, indicating that the amplitude of vibration transmitted to the base structure was reduced in a wider frequency band. The average of each peak value is reduced by about 30dB, the vibration energy is obviously reduced, and the vibration reduction effect of the particle damper is reflected.

Example four:

as shown in fig. 5, the particle damper of the present embodiment has substantially the same structure as the particle damper of the third embodiment except that the lattice holes of the elastic body 2 of the present embodiment are arranged in the height direction of the housing 1.

Example five:

as shown in fig. 6, the components of the particle damper of this embodiment are substantially the same as those of the third and fourth embodiments, except that the housing 1 and the elastic body 2 of this embodiment are both cylindrical.

In the description herein, references to the description of "some embodiments," "other embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A particle damper, comprising:

a housing (1);

the elastic body (2) is arranged in the shell (1), and a gap is formed between the elastic body (2) and the shell (1);

damping particles (3), the damping particles (3) being arranged in the elastomer (2) and/or the damping particles (3) being arranged in the voids.

2. A particle damper as claimed in claim 1, characterized in that said elastic body (2) comprises:

a hollow structure (21), wherein the damping particles (3) are arranged in the hollow structure (21);

one end of the connecting piece (22) is connected to the hollow structure (21), and the other end of the connecting piece (22) is connected to the inner side wall of the shell (1).

3. A particle damper as claimed in claim 2, characterized in that the hollow structure (21) is a cuboid, at least one side wall of which is formed as a first grid plate, the grid interstices of which are smaller than the particle size of the damping particles (3).

4. A particle damper as claimed in claim 2, wherein said elastic body (2) is plural, and plural elastic bodies (2) are provided at intervals along a length direction of said housing (1).

5. A particle damper as claimed in claim 1, characterized in that said elastic body (2) comprises:

the horizontal part (23), the said horizontal part (23) and roof of the said body (1) set up with interval;

the number of the vertical parts (24) is two, one end of each vertical part (24) is connected with the horizontal part (23), and the other end of each vertical part is connected with the bottom wall of the shell (1).

6. A particle damper as claimed in claim 5, characterized in that at least one of the horizontal part (23) and the vertical part (24) is formed as a second grid plate having grid voids smaller than the particle size of the damping particles (3).

7. Particle damper according to claim 5, characterised in that the end of the vertical part (24) remote from the horizontal part (23) is provided with a connecting flange (241), which connecting flange (241) is connected to the bottom wall of the housing (1).

8. A particle damper as claimed in claim 1, characterized in that the elastomer (2) is any of a steel wire mass, an elastic net or a foam piece.

9. A particle damper as claimed in any one of claims 1-8, characterized in that said housing (1) comprises:

the box body (11), one end of the box body (11) is opened;

the cover body (12), the cover body (12) lock is in the open end of the box body (11) and can be detachably connected with the box body (11).

10. A particle damper as claimed in any one of claims 1-8, characterized in that the damping particles (3) are any one or at least two of metal particles, plastic particles, glass particles, ceramic particles, sand particles, stone particles.