CN116379085A - Vibration isolator with multiple band gap characteristics - Google Patents
Vibration isolator with multiple band gap characteristics Download PDFInfo
- Publication number
- CN116379085A CN116379085A CN202310227122.3A CN202310227122A CN116379085A CN 116379085 A CN116379085 A CN 116379085A CN 202310227122 A CN202310227122 A CN 202310227122A CN 116379085 A CN116379085 A CN 116379085A
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- Prior art keywords
- vibration
- band gap
- vibration isolator
- vibration reduction
- multiple band
- Prior art date
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- 239000002184 metal Substances 0.000 claims abstract description 30
- 238000013016 damping Methods 0.000 claims abstract description 29
- 239000010410 layer Substances 0.000 claims abstract description 24
- 239000011241 protective layer Substances 0.000 claims abstract description 9
- 230000009467 reduction Effects 0.000 abstract description 22
- 239000000463 material Substances 0.000 abstract description 7
- 238000002955 isolation Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 4
- 229920002379 silicone rubber Polymers 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
Abstract
The invention relates to a vibration isolator with various band gap characteristics, which comprises an upper cover plate and a lower cover plate, wherein the upper cover plate and the lower cover plate are connected and fixed through connecting bolts, a plurality of vibration reduction units are distributed between the two cover plates, an elastic damping filling layer is arranged in a gap between the vibration reduction units, and a protective layer is arranged around all the vibration reduction units and the elastic damping filling layer between the two cover plates. The vibration reduction unit comprises a plurality of layers of metal vibrators which are sequentially arranged from inside to outside, and elastic elements are filled between the metal vibrators. The vibration reduction unit has more band gaps with different bandwidths, and can realize band gap control of the vibration reduction unit by changing the material property of the elastic element, so that the performance adjustability of the vibration isolator is realized, and the vibration isolator can realize effective attenuation of vibration in a larger frequency range covering high and low frequencies.
Description
Technical Field
The invention relates to the field of vibration isolation of large buildings under the action of external load, in particular to a vibration isolator with various band gap characteristics.
Background
Vibration widely exists in civil engineering, and not only can threaten the safety of a structure, but also can influence the normal use of precise instruments in the structure. The passive control vibration isolation technology is used as an effective vibration control means and is widely applied to the field of vibration control of civil engineering structures at present. The traditional passive control vibration isolation technology mainly utilizes elastic elements such as metal springs, rubber and the like to be matched with damping elements for vibration isolation, and external energy is not required to be input. The main principle is that the natural frequency of the structure is reduced, and the vibration energy transmitted to the vibration-receiving object by the vibration source is reduced, so that the vibration control of the vibration-receiving object is realized. Although the passive vibration isolation control method can greatly reduce the natural frequency of the structure and improve the vibration isolation efficiency, when the dynamic characteristics of the main structure or the load change, the dynamic characteristics of the passive vibration isolation device cannot be adjusted in real time due to the structural particularity of the passive vibration isolation device, so that the control effect is poor.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a vibration isolator with various band gap characteristics.
The invention adopts the following technical scheme to realize the aim:
a vibration isolator with various band gap characteristics comprises an upper cover plate and a lower cover plate, wherein the upper cover plate and the lower cover plate are connected and fixed through connecting bolts, a plurality of vibration reduction units are distributed between the two cover plates, an elastic damping filling layer is arranged in a gap between the vibration reduction units, and a protective layer is arranged around all the vibration reduction units and the elastic damping filling layer between the two cover plates.
The vibration reduction unit comprises a plurality of layers of metal vibrators which are sequentially arranged from inside to outside, and elastic elements are filled between the metal vibrators.
The innermost metal vibrator is of a cuboid structure, and the outer metal vibrator is of a U-shaped structure.
A plurality of lead core columns are uniformly distributed between the two cover plates.
Connecting holes are correspondingly formed in two sides of the two cover plates, and connecting bolts penetrate through the connecting holes corresponding to the two cover plates and are fixed through nuts.
The number of layers of the metal vibrator with the U-shaped structure is not less than two.
The number of the lead core columns is four.
The beneficial effects of the invention are as follows: the vibration reduction unit has more band gaps with different bandwidths, and can realize band gap control of the vibration reduction unit by changing the material property of the elastic element, so that the performance adjustability of the vibration isolator is realized, and the vibration isolator can realize effective attenuation of vibration in a larger frequency range covering high and low frequencies.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the structure of the present invention with the protective layer omitted;
FIG. 3 is a layout of the internal structure of the present invention;
FIG. 4 is a schematic view of a vibration damping unit according to the present invention;
FIG. 5 is a schematic view of a resonant mode of the vibration damping unit of the present invention under external load;
FIG. 6 is a schematic diagram of bandgap characteristics of a damping unit according to the present invention;
in the figure: 1-a cover plate; 2-connecting bolts; 3-a vibration damping unit; 4-an elastic damping filling layer; 5-a protective layer; 6-lead stem; 7-connecting holes; 8-a nut;
31-a metal vibrator; 32-an elastic element;
the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention. The invention is more particularly described by way of example in the following paragraphs with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
an isolator with various band gap characteristics is shown in fig. 1-3, and consists of a cover plate 1, a connecting bolt 2, a vibration reduction unit 3, an elastic damping filling layer 4, a protective layer 5 and a lead core column 6.
The cover plate 1 comprises an upper cover plate and a lower cover plate, a plurality of vibration reduction units 3 are arranged between the two cover plates 1, an elastic damping filling layer 4 is arranged in a gap between the vibration reduction units 3, and a protective layer 5 is arranged around all the vibration reduction units 3 and the elastic damping filling layer 4 between the two cover plates 1
The elastic damping filling layer 4 is made of polyurethane silicone rubber or the like, and has the main function of transmitting force and displacement, and simultaneously provides a deformation space for the vibration reduction unit 3.
The cover plates 1 mainly serve as the vibration reduction units 3 in the fixed parts, connecting holes 7 are correspondingly formed in two sides of the two cover plates 1, and connecting bolts 2 are arranged in the connecting holes 7 corresponding to the two cover plates 1 in a penetrating mode and are fixed through nuts 8.
The protection layer 5 mainly serves to protect the vibration damping unit 3 and the elastic damping filling layer 4 inside the vibration isolator and prevent the internal structure from being damaged due to the natural environment or external force.
The lead core column 6 has higher initial yield rigidity and lower post-bending rigidity, and the proper amount of the lead core column 6 is arranged in the vibration isolator, so that the energy consumption performance of the vibration isolator can be improved, and meanwhile, the initial rigidity of the vibration isolator is improved.
The vibration damping unit 3 is composed of a plurality of layers of metal vibrators 31 and elastic elements 32, and the elastic elements 32 are filled between adjacent metal vibrators 31, as shown in fig. 4. The innermost metal vibrator 31 is of a cuboid structure, and the outer metal vibrator 31 is of a U-shaped structure; the number of layers of the metal vibrator 31 of the U-shaped structure is not less than two.
The materials of the components of the damping unit 3 must satisfy the following characteristics:
the density of the metal vibrator 31 is greater than that of the elastic element 32 so that the metal vibrator 31 stores energy;
the elastic modulus of the elastic element 32 is smaller than that of the metal vibrator 31;
the material of the vibration damping unit 3 needs to have high deformation rigidity.
The metal vibrator 31 may be made of steel material, the elastic element 32 may be made of silicone rubber, and under the action of external load, the elastic modulus of the elastic element 32 is smaller than that of the metal vibrator 31, so that the metal vibrator 31 deforms such as translation, torsion and the like, as shown in fig. 5. The external load energy is stored in the vibration damping unit 3 in the form of kinetic energy and deformation energy of the metal vibrator 31, thereby generating a band gap in the frequency domain. Due to the unique construction of the metal vibrator 31, the vibration damping unit 3 has different energy storage modes under the action of external load, which enables the vibration damping unit 3 to have band gaps with various widths, as shown in fig. 6. As can be seen from fig. 6, the vibration isolator provided by the invention has a good isolation effect on low-frequency vibration, and can isolate all vibrations below 500 Hz.
Considering the special construction of the vibration isolator, the following steps should be followed in the actual manufacturing process:
the channel steels with different sizes are used as metal vibrators 31 with external U-shaped structures, and silicon rubber is filled between the channel steels of adjacent layers to manufacture vibration reduction units 3;
the material properties of the silicon rubber are set to be different so as to realize richer band gap characteristics of the vibration isolator;
the vibration reduction units 3 are arranged in layers in the protective layer 5, the lead core columns 6 are arranged, and the elastic damping filling layers 4 are poured in layers;
after the inside of the protective layer 5 is filled, the upper cover plate 1 and the lower cover plate 1 are covered and connected through the connecting bolts 2.
Due to the special structure of the vibration isolator, the vibration mode of the metal vibrator 31 corresponds to different motion states of the metal vibrator 31, such as torsion, translation, shearing and the like, so that the vibration reduction unit 3 is promoted to have more band gaps with different bandwidths; by changing the material properties of the elastic element 31, the band gap control of the vibration reduction unit 3 can be realized, so that the performance adjustability of the vibration isolator is realized, and the vibration isolator can realize effective attenuation of vibration in a larger frequency range covering high and low frequencies; different initial yield forces and yield stiffness of the vibration isolator can be obtained by changing the volume of the lead column 6; under the action of external load, vibration waves can be better filtered, external vibration is isolated, an external structure is protected, and the safety and stability of the structure are improved.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is intended to cover various modifications, either made by the method concepts and technical solutions of the invention, or applied directly to other applications without modification, within the scope of the invention.
Claims (7)
1. The utility model provides a isolator with multiple band gap characteristic, its characterized in that includes two apron (1) from top to bottom, and two apron (1) are connected fixedly through connecting bolt (2), have laid a plurality of damping units (3) between two apron (1) and be equipped with elasticity damping filling layer (4) in the space between damping unit (3), are equipped with protective layer (5) around all damping units (3), elasticity damping filling layer (4) between two apron (1).
2. Vibration isolator with multiple band gap characteristics according to claim 1, characterized in that the vibration damping unit (3) comprises several layers of metal vibrators (31) arranged in sequence from inside to outside, and elastic elements (32) are filled between the metal vibrators (31).
3. Vibration isolator with multiple band gap characteristics according to claim 2, characterized in that the innermost metal vibrator (31) is of a cuboid structure and the outer metal vibrator (31) is of a U-shaped structure.
4. A vibration isolator with multiple band gap characteristics according to claim 3, characterized in that a plurality of lead pillars (6) are uniformly distributed between two cover plates (1).
5. The vibration isolator with various band gap characteristics according to claim 4, wherein connecting holes (7) are correspondingly formed on two sides of the two cover plates (1), and the connecting bolts (2) are penetrated in the connecting holes (7) corresponding to the two cover plates (1) and fixed through nuts (8).
6. The vibration isolator with multiple band gap characteristics according to claim 5, wherein the number of layers of the metal vibrator (31) of the U-shaped structure is not less than two.
7. Vibration isolator with multiple band gap characteristics according to claim 6, characterized in that the number of lead pins (6) is four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310227122.3A CN116379085A (en) | 2023-03-10 | 2023-03-10 | Vibration isolator with multiple band gap characteristics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310227122.3A CN116379085A (en) | 2023-03-10 | 2023-03-10 | Vibration isolator with multiple band gap characteristics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116379085A true CN116379085A (en) | 2023-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310227122.3A Pending CN116379085A (en) | 2023-03-10 | 2023-03-10 | Vibration isolator with multiple band gap characteristics |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116773402A (en) * | 2023-08-25 | 2023-09-19 | 济南二机床新光机电有限公司 | Vibration isolator damping fluid property testing method, system, terminal and storage medium |
-
2023
- 2023-03-10 CN CN202310227122.3A patent/CN116379085A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116773402A (en) * | 2023-08-25 | 2023-09-19 | 济南二机床新光机电有限公司 | Vibration isolator damping fluid property testing method, system, terminal and storage medium |
| CN116773402B (en) * | 2023-08-25 | 2023-12-26 | 济南二机床新光机电有限公司 | Vibration isolator damping fluid property testing method, system, terminal and storage medium |
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