CN214617628U

CN214617628U - Unit equipment and particle damper with damping function

Info

Publication number: CN214617628U
Application number: CN202120308948.9U
Authority: CN
Inventors: 肖望强; 林能雄
Original assignee: Xiamen Zhenwei Technology Co ltd
Current assignee: Xiamen Zhenwei Technology Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-11-05
Anticipated expiration: 2031-02-03

Abstract

The utility model provides a unit device with vibration reduction function, relating to the technical field of vibration reduction and noise reduction, comprising a base used for supporting the unit body and a particle damper arranged on the base; the particle dampers are arranged on the outer side of the base in a fitting mode, and are regularly arranged along the direction of a vibration path of the base, wherein the vibration path is transmitted to the base along the unit body. Thereby reduce the base vibration, promote near unit equipment's stability to improve the not good problem of current unit equipment damping effect. The present application further provides a particle damper.

Description

Unit equipment and particle damper with damping function

Technical Field

The utility model relates to a technical field of making an uproar falls in the damping particularly, relates to a unit equipment and particle damper with damping function.

Background

In the running process of the unit, the bearing is eccentrically worn, the unit is not concentric or the bearing is worn; stator and rotor friction, uneven air gaps or bearing wear; the base generates vibration and indirectly transmits the vibration to the ground due to the longitudinal torsional vibration of a shafting, external unbalanced moment and the vibration of the whole framework of the main machine, so that the ground generates vibration and an unstable phenomenon is caused.

The vibration reduction mode of the current unit equipment is single. The vibration damping means generally uses rubber, a spring, or the like. The rubber has high elasticity and viscoelasticity, and compared with steel materials, the rubber has large elastic deformation and small elastic modulus, but has weak heat resistance, weak environment and high temperature resistance change capability, short service life and difficult natural frequency below 5 HZ. The spring vibration isolator has strong adaptability to the working environment and can normally work in severe environment. The vibration isolation device has obvious effects on positive vibration isolation, negative vibration isolation, impact vibration isolation and solid sound transmission isolation. However, the stiff spring has large damping, and is likely to resonate with the device during operation, and the internal spring is likely to shake when the device is placed unevenly.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a unit equipment and particle damper with damping function aims at improving the not good problem of damping mode effect of current unit equipment.

The utility model adopts the following scheme:

the unit equipment with the vibration reduction function comprises a base and a particle damper, wherein the base is used for supporting the unit body, and the particle damper is arranged on the base; the particle dampers are arranged on the outer side of the base in a fitting mode, and are regularly arranged along the direction of a vibration path of the base, wherein the vibration path is transmitted to the base along the unit body.

As a further improvement, vibration reduction belts formed by surrounding a plurality of particle dampers at uniform intervals are annularly arranged on the upper edge side and the lower edge side of the base, and a vibration source provided by the unit body is transmitted between the two vibration reduction belts through guide belts arranged at intervals; each guide belt consists of particle dampers which are sequentially arranged at intervals along the direction of the vibration reduction belt; the damping band is guided to form a damping area.

As a further improvement, each damping strip is disposed substantially laterally and annularly on the outside of the base, and each guide strip is disposed on the base substantially in a vertically spaced arrangement to engage each damping strip.

As a further improvement, the top surface of the base is in contact with the unit body, and a plurality of vibration isolators are distributed on the bottom surface of the base and used for supporting the base on a placing surface; and rubber pads are arranged at the bottoms of the vibration isolators.

The particle damper is configured on the unit equipment and comprises a shell and damping particles filled in the shell; the shell is provided with an accommodating cavity with an opening at one end, and a partition board is arranged in the accommodating cavity to correspondingly divide the accommodating cavity into a plurality of accommodating spaces; the damping particles are filled in the containing spaces, and the shell is attached to the outer side of the base and correspondingly closes the opening.

As a further improvement, the housing is further provided with a cover plate matched with the opening, and the cover plate is detachably arranged on one side of the housing; the damping device is characterized in that at least two symmetrically arranged accommodating spaces are uniformly distributed in the accommodating cavity, and the filling rates of the damping particles in the accommodating spaces are different.

As a further improvement, the accommodating cavity has six accommodating spaces, each of which has the same size and is symmetrically distributed in pairs, wherein the filling rates in the accommodating spaces at the edge sides in the length direction are the same, and the filling rates in the accommodating spaces at the middle side and the edge sides are different.

As a further improvement, the diameters of the damping particles filled in the middle-side accommodating space and the edge-side accommodating space of the accommodating cavity are different.

As a further improvement, the volume filling rate of the damping particles is 85-95%.

As a further improvement, the housing is extended along two sides of the cover plate and provided with mounting ears for fastening the housing to the outside of the base, and the cover plate is correspondingly attached and arranged outside the base.

By adopting the technical scheme, the utility model discloses can gain following technological effect:

this application disposes a plurality of particle dampers in the laminating of the base outside, and each particle damper is arranged along the vibration path direction that unit body transmitted to the base. The vibration energy is dissipated by the collision and friction between the particles in the particle damper or between the particles and the cavity wall. Thereby reduce the base vibration, promote near unit equipment's stability to improve the not good problem of current unit equipment damping effect. Can be applied to low-speed machines of ships and the like.

In addition, the particle dampers are distributed along the vibration path instead of being fully distributed along the outer side of the base, so that the vibration reduction effect is guaranteed, and meanwhile, the cost can be saved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a unit device with a vibration damping function according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a unit device with a vibration damping function according to an embodiment;

FIG. 3 is a schematic structural diagram of a particle damper according to an embodiment;

FIG. 4 is a flow diagram of determining a vibration path according to one embodiment;

FIG. 5 is a graph comparing the damping effect of an embodiment.

Icon: 1-a unit body; 2-a base; 3-a particle damper; 31-a housing; 32-damping particles; 33-a separator; 34-a cover plate; 4-vibration isolator; 5-rubber pad.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

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", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but 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, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

With reference to fig. 1 and fig. 2, the present embodiment provides a unit device with a vibration damping function, including a unit body 1, a base 2 for supporting the unit body 1, and a particle damper 3 disposed on the base 2; wherein, particle damper 3 is equipped with a plurality ofly, all laminates and disposes in the outside of base 2, and each particle damper 3 is arranged along the vibration route direction rule that unit body 1 transmitted to base 2.

In the present embodiment, a plurality of particle dampers 3 are attached to the outer side of the base 2, and the particle dampers 3 are arranged along the direction of the vibration path transmitted from the unit body 1 to the base 2. The vibration energy is dissipated by particle-to-particle collision and friction, or particle-to-chamber wall collision and friction, within the particle damper 3. Thereby reduce 2 vibrations of base, promote near unit equipment's stability to improve the not good problem of current unit equipment damping effect. In addition, the particle dampers 3 are distributed along the vibration path instead of being fully distributed along the outer side of the base 2, so that the cost can be saved while the vibration reduction effect is ensured.

In particular, with reference to fig. 4, the vibration path can be analyzed by modal analysis of the base 2 to obtain a region of greater vibration magnitude. The mode is the natural vibration characteristic of the structural system. The free vibration of the linear system is decoupled into N orthogonal single degree of freedom vibration systems, corresponding to the N modes of the system. Each mode has a specific natural frequency, damping ratio and mode shape. Analyzing and acquiring relevant vibration characteristics of the base through a vibration transmission path; establishing a finite element model according to the material attribute and the matching relation, and carrying out finite element analysis to obtain modal distribution; and comprehensively considering the vibration transmission path, the modal sensitive point and the actual installation condition to determine the installation position of the damper.

When the unit is overloaded and is in direct rigid contact with the ground, the vibration reduction treatment cannot be carried out on the ground through a vibration isolation means, in a preferred embodiment, vibration reduction belts formed by uniformly enclosing a plurality of particle dampers 3 at intervals are annularly arranged on the upper edge side and the lower edge side of the base 2, and a vibration source provided by the unit body 1 is transmitted between the two vibration reduction belts through guide belts arranged at intervals; each guide belt is composed of particle dampers 3 which are sequentially arranged at intervals along the direction of the vibration reduction belt; damping band, leading to form the damping region. This arrangement further reduces the vibration between the base 2 and the unit body 1, and between the base 2 and the support surface.

Preferably, the damping strips are arranged substantially in a transverse loop on the outside of the base 2, and the guide strips are arranged on the base 2 at intervals in a substantially vertical configuration so as to engage the damping strips.

In other embodiments, the top surface of the base 2 is in contact with the unit body 1, a plurality of vibration isolators 4 are distributed on the bottom surface of the base 2, and the vibration isolators 4 are used for supporting the base 2 on a placing surface; and rubber pads 5 are arranged at the bottoms of the vibration isolators 4. Vibration of the base 2 is reduced and vibration reduction effect is enhanced by arranging the vibration isolators 4 on the bottom surfaces of the bases 2 and the rubber pads 5 which are arranged in one-to-one correspondence with the vibration isolators 4. The device is suitable for some unit equipment with smaller load and is not directly and rigidly connected with the ground. With reference to fig. 3, another embodiment provides a particle damper 3 configured to be disposed in the unit device as described above, including a housing 31, and damping particles 32 filled in the housing 31; the housing 31 has an accommodating cavity with an opening at one end, and a partition plate 33 is arranged in the accommodating cavity to correspondingly divide the accommodating cavity into a plurality of accommodating spaces; the damping particles 32 are filled in the accommodating spaces, and the shell 31 is attached to the outer side of the base 2 to correspondingly close the opening.

It should be noted that the particle damper 3 is filled with damping particles 32, the particle material is a typical discontinuous porous medium, and the particle material has a small volume, high temperature resistance, high reliability and good vibration damping effect. The energy consumption mechanism of the particle damping vibration attenuation system is as follows: when the main structure vibrates, the unit base particle damper vibrates together with the main structure, external excitation enables collision and friction between particles and between the particles and the inner wall of the damper, and the damper dissipates vibration energy through collision and friction.

In other embodiments, the housing 31 is further provided with a cover plate 34 adapted to the opening, and the cover plate 34 is removably disposed on one side of the housing 31; at least two symmetrically arranged accommodating spaces are uniformly distributed in the accommodating cavity, and the filling rates of the damping particles 32 in the accommodating spaces are different.

In another preferred embodiment, the cover plate 34 is welded and fixed to the housing 31, and the receiving cavity has six receiving spaces, each receiving space has the same size and is symmetrically distributed two by two, wherein the filling rates of the receiving spaces located at the edge sides in the length direction are the same, and the filling rates of the receiving spaces located at the middle side and the edge sides are different.

On the basis of the above embodiments, in an optional embodiment of the present invention, the damping particles 32 are made of metal, nonmetal or polymer composite; the shape of which is regular or irregular polyhedron. The damping particles 32 filled in the middle-side accommodation space and the edge-side accommodation space of the accommodation chamber have different diameters.

It should be noted that the volume filling rate of the damping particles 32 is 85% to 95%. In a certain shape and a certain filling space, it is preferable that the particle size of the particles is not as large as possible, and it is preferable that the particle size of the particles is not as small as possible. According to the mechanism of particle damping vibration attenuation technology, low-order damping is mainly provided by collision and friction between particles, and high-order damping is mainly generated by the collision between particles and the wall of the damper. If the particle diameter is increased to a certain extent, and the corresponding impact and friction effects are increased to a certain intensity, the number of particles can also become an important factor influencing the damping effect of the particles. Under the condition that the damper volume is kept constant, the larger the diameter of the particles, the smaller the number of the particles, and although the energy consumption of single contact is larger, the chance of interaction among the particles is reduced, which is also not beneficial to enhancing the damping effect. The micro-gravity, space limitation and vibration reduction effects are considered, the volume filling rate of 85-95% of the filling rate is preferably adopted, and the energy consumption effect is optimal. When the filling rate is low, the damping particles can not play a self-role, and when the filling process reaches saturation overflow, the corresponding particles can not collide with each other, so that the damper becomes a single mass block.

In another embodiment, the housing 31 is extended along two sides of the cover 34 to form mounting ears for fastening the housing 31 to the outside of the base 2, and correspondingly, the cover 34 is disposed outside the base 2. Bolt holes are provided in the mounting ears so that the particle dampers 3 can be fastened to the base 2 by bolts. In particular, in other embodiments, the particle damper 3 may also be attached to the base 2 by means of bonding, welding, or the like.

Referring to fig. 5, the base with the particle damper is installed, and the whole operation unit system and the environment thereof are subjected to a starting vibration test, so that a vibration spectrum curve of the particle damper before and after installation is obtained. In the figure, curve a shows the vibration when the particle damper is not mounted, and curve B shows the vibration when the particle damper is mounted on the unit base. As can be seen from the figure, the curve B of the particle damper is basically under the curve A of the particle damper, the total extreme value of the test vibration is 123.75dB when the particle damper is not installed, namely when the particle damper is unloaded, and the total extreme value of the test vibration is 119.65dB after the particle damper is installed, which shows that the vibration damping effect is obviously improved after the particle damper is installed.

Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection.

Claims

1. The unit equipment with the vibration reduction function is characterized by comprising a base and a particle damper, wherein the base is used for supporting the unit body, and the particle damper is arranged on the base; wherein the content of the first and second substances,

the particle dampers are arranged on the outer side of the base in a fitting mode, and are regularly arranged along the direction of a vibration path of the unit body, wherein the vibration path is transmitted to the base.

2. The unit equipment according to claim 1, wherein the upper edge side and the lower edge side of the base are annularly provided with vibration reduction belts which are formed by surrounding a plurality of particle dampers at uniform intervals, and a vibration source provided by the unit body is transmitted between the two vibration reduction belts through guide belts which are arranged at intervals; each guide belt consists of particle dampers which are sequentially arranged at intervals along the direction of the vibration reduction belt; the damping band is guided to form a damping area.

3. The assembly of claim 2, wherein each of the vibration damping strips is disposed generally laterally outwardly of the base, and wherein each of the guide strips is spaced generally vertically on the base to engage each of the vibration damping strips.

4. The aggregate unit installation according to claim 1, wherein the top surface of the base is in contact with the aggregate body, and the bottom surface of the base is provided with a plurality of vibration isolators for supporting the base on a placement surface; and rubber pads are arranged at the bottoms of the vibration isolators.

5. A particle damper for arrangement in the aggregate unit according to any of claims 1 to 4, comprising a housing and damping particles for filling the housing; wherein the content of the first and second substances,

the shell is provided with an accommodating cavity with an opening at one end, and a partition board is arranged in the accommodating cavity so as to correspondingly divide the accommodating cavity into a plurality of accommodating spaces; the damping particles are filled in the containing spaces, and the shell is attached to the outer side of the base and correspondingly closes the opening.

6. The particle damper of claim 5, wherein said housing further comprises a cover plate adapted to fit said opening, said cover plate being removably disposed on a side of said housing; the damping device is characterized in that at least two symmetrically arranged accommodating spaces are uniformly distributed in the accommodating cavity, and the filling rates of the damping particles in the accommodating spaces are different.

7. The particle damper according to claim 5, wherein the receiving chamber has six receiving spaces, each of which has the same size and is symmetrically distributed two by two, wherein the receiving spaces located at the edge side in the length direction have the same filling rate, and the receiving spaces located at the middle side and the receiving spaces located at the edge side have different filling rates.

8. The particle damper as recited in claim 6, wherein the damping particles filled in the middle-side accommodation space and the edge-side accommodation space of the accommodation chamber have different diameters.

9. The particle damper of claim 5, wherein said housing is configured with mounting ears extending along two sides of said cover plate for fastening said housing to the outside of said base, and said cover plate is configured to fit over said base.