CN114110070A - Large-damping quasi-zero stiffness vibration isolator - Google Patents
Large-damping quasi-zero stiffness vibration isolator Download PDFInfo
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- CN114110070A CN114110070A CN202111570019.6A CN202111570019A CN114110070A CN 114110070 A CN114110070 A CN 114110070A CN 202111570019 A CN202111570019 A CN 202111570019A CN 114110070 A CN114110070 A CN 114110070A
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- vibration isolator
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- 238000013016 damping Methods 0.000 title claims abstract description 25
- 238000007789 sealing Methods 0.000 claims description 13
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims 2
- 241001330002 Bambuseae Species 0.000 claims 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 2
- 239000011425 bamboo Substances 0.000 claims 2
- 238000003466 welding Methods 0.000 claims 1
- 238000002955 isolation Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
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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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a large-damping quasi-zero stiffness vibration isolator which comprises a bottom shell, wherein a bottom plate is erected on a step of the inner cavity wall of the bottom shell, an oil cavity is formed between the bottom surface of the bottom plate and the bottom shell, a piston is arranged in the oil cavity, the piston is connected with a piston rod, the top end of the piston rod penetrates through the bottom plate and is fixedly connected with a stud, a pressing plate is arranged at the top of the inner cavity wall of the bottom shell, disc springs are arranged between the bottom surface of the pressing plate and the bottom plate, cushion blocks are arranged between adjacent disc springs, a fixing plate is arranged at the bottom end of the stud, and the fixing plate is in contact with the bottom surface of the lower disc spring. This quasi-zero rigidity isolator of big damping increases the oil pocket at the cavity of bottom casing, is connected piston and double-screw bolt through the piston rod, utilizes piston and a plurality of dish spring's damping in coordination, has realized quasi-zero rigidity, has improved its vibration isolation performance simultaneously, whole isolator compact structure, and stability is high.
Description
Technical Field
The invention relates to the field of vibration isolators, in particular to a large-damping quasi-zero stiffness vibration isolator.
Background
The vibration isolator is an elastic member connecting the equipment and the foundation to reduce and eliminate vibration force transmitted from the equipment to the foundation and vibration transmitted from the foundation to the equipment, and the conventional linear vibration isolator has a vibration isolation capability when an external excitation frequency is about 1.4 times higher than a natural frequency thereof, and the mass of a general load cannot be changed, and obviously, reducing the rigidity is an effective method for expanding a vibration isolation frequency band. However, too low stiffness causes excessive static deformation, so that the conventional vibration isolator has the problem that the effective vibration isolation frequency band is limited by the bearing capacity. Negative stiffness, as opposed to the usual positive stiffness, refers to the characteristic of load increment being opposite in direction to the deformation increment. The quasi-zero stiffness vibration isolator has the characteristics of ensuring high bearing capacity by high static stiffness and widening vibration isolation frequency band by low dynamic stiffness, and can realize low-frequency or even ultra-low-frequency vibration isolation. However, the quasi-zero stiffness vibration isolator in the prior art is difficult to realize real zero stiffness, so that the problem of low-frequency resonance still exists, and the vibration isolation performance is limited.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a large-damping quasi-zero stiffness vibration isolator, which solves the problems in the background technology.
In order to achieve the purpose, the invention is realized by the following technical scheme: a large-damping quasi-zero stiffness vibration isolator comprises a bottom shell, wherein a bottom plate is erected on a step of the inner cavity wall of the bottom shell, an oil cavity is formed between the bottom surface of the bottom plate and the bottom shell, a piston is arranged in the oil cavity, a piston rod is connected onto the piston, and the top end of the piston rod penetrates through the bottom plate and is fixedly connected with a stud;
the top of the inner cavity wall of the bottom shell is provided with a pressing plate, the bottom surface of the pressing plate is provided with disc springs between the bottom plates, cushion blocks are arranged between adjacent disc springs, the bottom end of the stud is provided with a fixing plate, the fixing plate is in bottom contact with the disc springs on the lower layer, and the top end of the stud penetrates through the disc springs and extends into a central cylinder erected on the disc springs on the uppermost layer to be connected with a locking nut.
Further inject, foretell quasi-zero rigidity isolator of big damping, wherein, dish spring equidistance sets up from top to bottom.
Further, the top end of the inner cavity wall of the bottom shell is provided with a guide groove, a top plate shell is connected in the guide groove in a sliding mode, and the outer wall of the central cylinder is welded with the top plate shell.
Further, the sealing parts are arranged between the bottom plate and the step and between the piston rod and the bottom plate.
Further, the vibration isolator with high damping quasi-zero stiffness is characterized in that the sealing element is a rubber sealing ring.
Further, the vibration isolator with high damping quasi-zero stiffness is characterized in that the pressure plate is in threaded connection with the inner cavity wall of the bottom shell.
The invention has the following beneficial effects: this quasi-zero rigidity isolator of big damping increases the oil pocket at the cavity of bottom casing, is connected piston and double-screw bolt through the piston rod, utilizes piston and a plurality of dish spring's damping in coordination, has realized quasi-zero rigidity, has improved its vibration isolation performance simultaneously, whole isolator compact structure, and stability is high.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
In the figure: 1. a bottom housing; 2. an oil chamber; 3. a base plate; 4. cushion blocks; 5. pressing a plate; 6. a guide groove; 7. a top plate housing; 8. a central barrel; 9. a stud; 10. a disc spring; 11. a fixing plate; 12. a seal member; 13. a piston; 14. and locking the nut.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a large-damping quasi-zero stiffness vibration isolator comprises a bottom shell 1, wherein a bottom plate 3 is erected on a step of the inner cavity wall of the bottom shell 1, an oil cavity 2 is formed between the bottom surface of the bottom plate 3 and the bottom shell 1, a piston 13 is arranged in the oil cavity 2, the piston 13 is connected with a piston rod, and the top end of the piston rod penetrates through the bottom plate 3 and is fixedly connected with a stud 9;
the top of the cavity wall in the casing of bottom 1 is equipped with clamp plate 5, be equipped with dish spring 10 between this clamp plate 5's bottom surface and the bottom plate 3, dish spring 10 from top to bottom equidistance sets up, be equipped with cushion 4 between the adjacent dish spring 10, threaded connection between the inner chamber wall of clamp plate 5 and casing of bottom 1, clamp plate 5 is used for spacing to the top of dish spring 10, adopt threaded connection to make the dismouting more convenient, the bottom of double-screw bolt 9 is equipped with fixed plate 11, this fixed plate 11 contacts with the dish spring 10 bottom surface of lower floor, the top of double-screw bolt 9 is run through dish spring 10 and is extended to and is connected with lock nut 14 in the central cylinder 8 of dish spring 10 upper mounting on the superiors.
The top of the inner cavity wall of the bottom shell 1 is provided with a guide groove 6, a top plate shell 7 is connected in the guide groove 6 in a sliding mode, the outer wall of the central cylinder 8 is welded with the top plate shell 7, and the effect of guiding the central cylinder 8 can be achieved through the sliding of the top plate shell 7 in the guide groove 6.
When the vibration damping device works, the top of the central cylinder 8 is connected with equipment, the bottom shell 1 is arranged on a foundation, the oil cavity 2 is filled with damping medium oil, when the equipment vibrates, vibration force is transmitted to the central cylinder 8, the central cylinder 8 transmits the vibration force to the disc spring 10, along with the deformation of the disc spring 10, a part of energy is consumed, the piston 13 is driven to descend to push the damping medium to convert kinetic energy into heat energy to do work, and along with the consumption of the energy, the disc spring 10 resets to drive the central cylinder to rise to an original state.
This quasi-zero rigidity isolator of big damping increases oil pocket 2 at the cavity of bottom casing 1, is connected piston 13 and double-screw bolt 9 through the piston rod, utilizes piston 13 and the damping in coordination of a plurality of dish springs 10, has realized quasi-zero rigidity, has improved its vibration isolation performance simultaneously, whole isolator compact structure, and stability is high.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a big damping quasi-zero rigidity isolator, includes bottom casing (1), its characterized in that: a bottom plate (3) is erected on a step of the inner cavity wall of the bottom shell (1), an oil cavity (2) is formed between the bottom surface of the bottom plate (3) and the bottom shell (1), a piston (13) is arranged in the oil cavity (2), a piston rod is connected to the piston (13), and the top end of the piston rod penetrates through the bottom plate (3) and is fixedly connected with a stud (9);
the top of bottom casing (1) inner chamber wall is equipped with clamp plate (5), the bottom surface of this clamp plate (5) with be equipped with dish spring (10) between bottom plate (3), be equipped with cushion (4) between adjacent dish spring (10), the bottom of double-screw bolt (9) is equipped with fixed plate (11), and this fixed plate (11) and the dish spring (10) bottom surface contact of lower floor, the top of double-screw bolt (9) run through dish spring (10) and extend to be connected with lock nut (14) in the central section of thick bamboo (8) of the superiors dish spring (10) upper bracket.
2. The vibration isolator with large damping quasi-zero stiffness as claimed in claim 1, wherein: the disc springs (10) are arranged at equal intervals from top to bottom.
3. The vibration isolator with large damping quasi-zero stiffness as claimed in claim 2, wherein: the top of bottom casing (1) inner chamber wall is equipped with guide way (6), and sliding connection has roof casing (7) in guide way (6), the outer wall of a center section of thick bamboo (8) with roof casing (7) welding.
4. The vibration isolator with large damping quasi-zero stiffness as claimed in claim 1, wherein: sealing elements (12) are arranged between the bottom plate (3) and the step and between the piston rod and the bottom plate (3).
5. The vibration isolator with large damping and quasi-zero stiffness as claimed in claim 4, wherein: the sealing element (12) adopts a rubber sealing ring.
6. The vibration isolator with large damping quasi-zero stiffness as claimed in claim 1, wherein: the pressing plate (5) is in threaded connection with the inner cavity wall of the bottom shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111570019.6A CN114110070A (en) | 2021-12-21 | 2021-12-21 | Large-damping quasi-zero stiffness vibration isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111570019.6A CN114110070A (en) | 2021-12-21 | 2021-12-21 | Large-damping quasi-zero stiffness vibration isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114110070A true CN114110070A (en) | 2022-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111570019.6A Pending CN114110070A (en) | 2021-12-21 | 2021-12-21 | Large-damping quasi-zero stiffness vibration isolator |
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| CN (1) | CN114110070A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114537455A (en) * | 2022-03-18 | 2022-05-27 | 中车唐山机车车辆有限公司 | Light high-sound-insulation floor for motor train unit and design method thereof |
| CN115289175A (en) * | 2022-08-26 | 2022-11-04 | 上海工程技术大学 | Vehicle suspension damping support |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0486227A1 (en) * | 1990-11-13 | 1992-05-20 | General Electric Company | Vibration damper assembly |
| JPH10311369A (en) * | 1997-05-13 | 1998-11-24 | Ohbayashi Corp | Base isolation device |
| DE19938084A1 (en) * | 1998-12-11 | 2000-07-06 | Daimler Chrysler Ag | Seal for rod of damping cylinder has a floating support for sealing rings and with an axially sprung fitting for the seal support |
| CN105240434A (en) * | 2015-11-17 | 2016-01-13 | 北京理工大学 | Disc spring quasi-zero stiffness vibration isolator |
| US20160102729A1 (en) * | 2014-10-08 | 2016-04-14 | Sercel, Inc. | Apparatus and method for vibration mitigation through sequential impedance optimization |
| CN106678264A (en) * | 2016-12-29 | 2017-05-17 | 北京建筑大学 | Critical unlocking vertical isolation bearing and method thereof |
| CN108591348A (en) * | 2018-04-19 | 2018-09-28 | 上海材料研究所 | It is a kind of damping and the adjustable disk spring damper of rigidity |
| CN216555110U (en) * | 2021-12-21 | 2022-05-17 | 江苏工邦振控科技有限公司 | Large-damping quasi-zero stiffness vibration isolator |
| US20220299083A1 (en) * | 2021-03-18 | 2022-09-22 | Toyota Motor Engineering & Manufacturing North America, Inc. | Stacked Disk Spring Vibration Isolator with Increased Lateral Load Capacity |
-
2021
- 2021-12-21 CN CN202111570019.6A patent/CN114110070A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0486227A1 (en) * | 1990-11-13 | 1992-05-20 | General Electric Company | Vibration damper assembly |
| JPH10311369A (en) * | 1997-05-13 | 1998-11-24 | Ohbayashi Corp | Base isolation device |
| DE19938084A1 (en) * | 1998-12-11 | 2000-07-06 | Daimler Chrysler Ag | Seal for rod of damping cylinder has a floating support for sealing rings and with an axially sprung fitting for the seal support |
| US20160102729A1 (en) * | 2014-10-08 | 2016-04-14 | Sercel, Inc. | Apparatus and method for vibration mitigation through sequential impedance optimization |
| CN105240434A (en) * | 2015-11-17 | 2016-01-13 | 北京理工大学 | Disc spring quasi-zero stiffness vibration isolator |
| CN106678264A (en) * | 2016-12-29 | 2017-05-17 | 北京建筑大学 | Critical unlocking vertical isolation bearing and method thereof |
| CN108591348A (en) * | 2018-04-19 | 2018-09-28 | 上海材料研究所 | It is a kind of damping and the adjustable disk spring damper of rigidity |
| US20220299083A1 (en) * | 2021-03-18 | 2022-09-22 | Toyota Motor Engineering & Manufacturing North America, Inc. | Stacked Disk Spring Vibration Isolator with Increased Lateral Load Capacity |
| CN216555110U (en) * | 2021-12-21 | 2022-05-17 | 江苏工邦振控科技有限公司 | Large-damping quasi-zero stiffness vibration isolator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114537455A (en) * | 2022-03-18 | 2022-05-27 | 中车唐山机车车辆有限公司 | Light high-sound-insulation floor for motor train unit and design method thereof |
| CN115289175A (en) * | 2022-08-26 | 2022-11-04 | 上海工程技术大学 | Vehicle suspension damping support |
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