CN210177734U - Vibration damper - Google Patents
Vibration damper Download PDFInfo
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- CN210177734U CN210177734U CN201920820977.6U CN201920820977U CN210177734U CN 210177734 U CN210177734 U CN 210177734U CN 201920820977 U CN201920820977 U CN 201920820977U CN 210177734 U CN210177734 U CN 210177734U
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- box body
- bearing platform
- outer box
- vibration
- damping device
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Abstract
The utility model discloses a vibration damper, belonging to the technical field of vibration damping structure, comprising an outer box body; the bearing platform is arranged in the outer box body in a sliding mode along the vertical direction, and a first elastic piece is arranged between the bearing platform and the bottom of the outer box body; the inner box body is arranged on the bearing platform, magnetorheological fluid is filled in the inner box body, and a plurality of circles of magnet exciting coils are wound outside the inner box body; the acceleration sensor and the magnet exciting coil are electrically connected to the control system, and the acceleration sensor is arranged on the outer box body. The outer box body is connected to the high-rise structure, and the inner box body, the bearing platform and the first elastic piece form a tuned mass damper for damping the high-rise structure in the vertical direction. The control system, the acceleration sensor and the magnet exciting coil are matched to adjust the size of the magnetic field, the damping device and the high-rise structure are enabled to continuously form internal resonance by changing the viscosity of the magnetorheological fluid, and the vibration of the high-rise structure can be still damped when the vibration directions and the strength of earthquakes, strong winds and the like have randomness.
Description
Technical Field
The utility model relates to a damping structure technical field especially relates to a vibration damper.
Background
With the development of society, various high-rise structures such as power transmission tower-line systems, communication iron towers, high-rise buildings and the like emerge in large quantities, and the construction climax can be continued for a long time along with the advance of the urbanization process. The high-rise structure has the characteristics of high structure, strong flexibility of the whole structure and the like, the structure vibrates obviously under the action of strong wind and earthquake, the dynamic response is large, the vulnerability is high, and the structure can be damaged or even collapsed in severe cases. The vibration of the towering structure under the action of dynamic load is reduced, and the safety use of the towering structure is ensured, so that the safety use of the towering structure is very important.
Structural vibration damping techniques reduce or dampen the vibration of a structure due to external loading by installing energy dissipation devices on the structure. The structural vibration reduction technology can be divided into active vibration reduction, passive vibration reduction, semi-active vibration reduction, hybrid vibration reduction and the like according to the existence of external energy input. The Tuned Mass Damper (TMD), the Tuned Liquid Damper (TLD) or the Suspended Mass Pendulum (SMP) can generate an inertia force opposite to the structural vibration direction during vibration by adjusting the frequency of the additional structure to be close to the main frequency of the structure, so that the vibration of the structure is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a vibration damper to realize still can playing fine damping effect under the condition that vibration direction and intensity all have randomness such as earthquake, strong wind.
As the conception, the utility model adopts the technical proposal that:
a vibration damping device comprising:
an outer case;
the bearing platform is arranged in the outer box body in a sliding mode along the vertical direction, and a first elastic piece is arranged between the bearing platform and the bottom of the outer box body;
the inner box body is arranged on the bearing platform, magnetorheological fluid is filled in the inner box body, and a plurality of circles of magnet exciting coils are wound outside the inner box body;
the acceleration sensor and the magnet exciting coil are electrically connected to the control system, and the acceleration sensor is arranged on the outer box body.
Further, the top of the inner box body is provided with a pendulum ball, the pendulum ball is connected with the inner box body through a second elastic piece, and the pendulum ball is located above the magnetorheological fluid.
Further, the pendulum ball is made of a conductive material.
Furthermore, a sliding rail is arranged on the inner wall of the outer box body along the vertical direction, and a pulley matched with the sliding rail is arranged on the bearing platform.
Furthermore, two sliding rails are arranged on two opposite inner walls of the outer box body, and four pulleys matched with the four sliding rails are arranged on the bearing platform.
Further, the excitation coils are connected in series or in parallel for a plurality of turns.
Further, the first elastic member is a memory alloy spring.
The utility model has the advantages that:
the utility model provides a vibration damper, outer box body coupling in the structure of towering, form harmonious mass damper through interior box, bearing platform and first elastic component, can carry out the damping to the structure of towering in vertical direction. The vibration strength of the towering structure is detected in real time through the acceleration sensor, a signal is transmitted to the control system, the control system adjusts the size of a magnetic field through the magnet exciting coil, and then the viscosity of magnetorheological fluid is changed, so that the natural frequency of the damping device is adjusted, internal resonance can be continuously formed between the damping device and the towering structure, and vibration reduction can still be carried out on the towering structure under the condition that the vibration directions and the vibration strength of earthquakes, strong winds and the like have randomness.
Drawings
Fig. 1 is a schematic structural diagram of a damping device provided by the present invention.
In the figure:
1. an outer case; 11. a load-bearing platform; 111. a pulley; 12. a first elastic member; 13. a slide rail;
2. an inner box body; 21. placing a ball; 22. a second elastic member;
31. a control system; 32. an acceleration sensor; 33. and a field coil.
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. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; 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 in specific cases to 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.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The embodiment provides a damping device, which is installed on a high-rise structure, is mainly used for damping the high-rise structure, and can still play a good damping role under the condition that the vibration direction and the vibration strength of earthquakes, strong wind and the like have randomness. Of course, in other embodiments, the damping device may be adapted to damp other structures.
As shown in fig. 1, the vibration damping device according to the present embodiment includes an outer casing 1, an inner casing 2, a control system 31, and an acceleration sensor 32. Wherein, outer box 1 is installed on the structure that stands tall and erects, and outer box 1 is the confined box, has bearing platform 11 in the outer box 1, and bearing platform 11 can gliding set up in the outer box 1, and bearing platform 11 slides along vertical direction, particularly, is provided with slide rail 13 on the inner wall of outer box 1, is provided with on the bearing platform 11 with slide rail 13 matched with pulley 111, in this embodiment, all be provided with slide rail 13 on two relative inner walls in the outer box 1, and is corresponding, be provided with respectively with two slide rail 13 matched with two pulley 111 on the bearing platform 11. In addition, a first elastic member 12 is disposed between the load bearing platform 11 and the bottom of the outer box 1, and a plurality of first elastic members 12 are disposed, so that the damping device can damp the high-rise structure in the vertical direction through the first elastic members 12. In this embodiment, the first elastic element 12 is a memory alloy spring, which has a strong self-resetting capability, and provides a high-efficiency damping force through the expansion and contraction of the memory alloy spring, and the memory alloy spring can be quickly restored to its original shape after being deformed, thereby achieving a good vibration damping effect.
The acceleration sensor 32 and the excitation coil 33 are both connected to the control system 31, in this embodiment, three excitation coils 33 are connected in parallel to the control system 31, the acceleration sensor 32 is disposed in the outer box 1 and is used for detecting the vibration intensity of the outer box 1, the outer box 1 is connected to the high-rise structure, the vibration intensity of the high-rise structure is detected, and a detection signal is sent to the control system 31, the control system 31 adjusts the number of the energized excitation coils 33 in stages after receiving the signal, for example, the first stage controls one excitation coil 33 to be energized, the second stage controls two excitation coils 33 to be energized, the third stage controls three excitation coils 33 to be energized, the excitation coils 33 and the magnetorheological fluid cooperate to form a magnetorheological damper, the excitation coil 33 changes the external magnetic field of the magnetorheological fluid through the excitation coil 33, so as to change the viscosity of the magnetorheological fluid and adjust the natural frequency of the vibration damping device, the damping device and the high-rise structure can continuously form internal resonance, so that the aim of controlling the vibration of the high-rise structure is fulfilled.
Of course, in other embodiments, three turns of the exciting coil 33 may also be connected in series to the control system 31, and in this case, the control system 31 may adjust the magnetic field intensity by controlling the magnitude of the voltage across the exciting coil 33. In addition, in this embodiment, the control system 31 may be a centralized or distributed control system 31, for example, the control system 31 may be a single-chip microcomputer or may be composed of a plurality of distributed single-chip microcomputers, and a control program may be run in the single-chip microcomputers to control the acceleration sensor 32, the excitation coil 33, and the like to implement the functions thereof. Moreover, the control system 31 is a conventional structure in the prior art and will not be described in detail herein.
The top inside the inner box body 2 is also provided with a pendulum ball 21, and the pendulum ball 21 is positioned above the magnetorheological fluid, namely the pendulum ball 21 is not contacted with the magnetorheological fluid. The pendulum ball 21 is connected to the inner box body 2 through the second elastic member 22, the pendulum ball 21 swings along with the vibration of the high-rise structure, vibration reduction in multiple directions is achieved, and the acting force applied to the pendulum ball 21 after the second elastic member 22 deforms increases the damping force formed by the pendulum ball 21, so that the vibration reduction of the high-rise structure is facilitated. In addition, in the embodiment, the pendulum ball 21 is made of a conductive material, preferably, the pendulum ball 21 is made of red copper, and the pendulum ball 21 continuously cuts magnetic induction lines of a magnetic field generated by the exciting coil 33 during the swinging process to generate an electric eddy current, so that the rotation of the high-rise structure is converted into electric energy and heat energy consumption, and the vibration of the high-rise structure is favorably reduced.
In summary, in the damping device provided in this embodiment, the outer box 1 is connected to the towering structure, the acceleration sensor 32 detects the vibration intensity of the towering structure and transmits a signal to the control system 31, the control system 31 controls the number of the energized excitation coils 33 to adjust the magnitude of the magnetic field, and further changes the viscosity of the magnetorheological fluid, so as to adjust the natural frequency of the damping device, so that the damping device and the towering structure can continuously form internal resonance, thereby achieving the purpose of damping the towering structure. And through the structure, the damping device can be suitable for the conditions that the vibration direction and the vibration intensity have randomness, such as earthquake, strong wind and the like.
The inner box body 2, the bearing platform 11 and the memory alloy spring form a tuned mass damper, so that the high-rise structure can be damped in the vertical direction; the pendulum ball 21 in the inner box 2 swings in the inner box 2, the aim of multi-direction vibration reduction can be achieved, the pendulum ball 21 continuously cuts magnetic induction lines to generate eddy current, and the aim of rapid energy consumption is achieved.
The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A vibration damping device, comprising:
an outer case (1);
the bearing platform (11) is arranged in the outer box body (1) in a sliding mode along the vertical direction, and a first elastic piece (12) is arranged between the bearing platform (11) and the bottom of the outer box body (1);
the inner box body (2) is arranged on the bearing platform (11), magnetorheological fluid is filled in the inner box body (2), and a plurality of circles of magnet exciting coils (33) are wound outside the inner box body (2);
the acceleration sensor (32) and the excitation coil (33) are both electrically connected to the control system (31), and the acceleration sensor (32) is arranged on the outer box body (1).
2. The vibration damper according to claim 1, characterized in that a pendulum ball (21) is arranged on the top of the inner box (2), the pendulum ball (21) is connected to the inner box (2) through a second elastic member (22), and the pendulum ball (21) is located above the magnetorheological fluid.
3. Damping device according to claim 2, characterized in that the pendulum ball (21) is made of an electrically conductive material.
4. The vibration damping device according to claim 1, characterized in that the inner wall of the outer box (1) is provided with a slide rail (13) along the vertical direction, and the bearing platform (11) is provided with a pulley (111) matched with the slide rail (13).
5. The vibration damping device according to claim 4, characterized in that two sliding rails (13) are arranged on two opposite inner walls of the outer box (1), and four pulleys (111) respectively matched with the four sliding rails (13) are arranged on the bearing platform (11).
6. The vibration damping device according to claim 1, characterized in that a plurality of the turns of the exciting coil (33) are connected in series or in parallel.
7. Damping device according to claim 1, characterized in that the first elastic element (12) is a memory alloy spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920820977.6U CN210177734U (en) | 2019-05-31 | 2019-05-31 | Vibration damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920820977.6U CN210177734U (en) | 2019-05-31 | 2019-05-31 | Vibration damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210177734U true CN210177734U (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920820977.6U Active CN210177734U (en) | 2019-05-31 | 2019-05-31 | Vibration damper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112227181A (en) * | 2020-10-20 | 2021-01-15 | 覃晓军 | Shock absorption structure for bridge and use method thereof |
| CN114992271A (en) * | 2022-07-18 | 2022-09-02 | 上海秦耀航空试验技术有限公司 | Airplane vibration reduction component, aviation wall plate and band gap design method |
-
2019
- 2019-05-31 CN CN201920820977.6U patent/CN210177734U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112227181A (en) * | 2020-10-20 | 2021-01-15 | 覃晓军 | Shock absorption structure for bridge and use method thereof |
| CN112227181B (en) * | 2020-10-20 | 2022-06-14 | 精易建工集团有限公司 | Shock absorption structure for bridge and use method thereof |
| CN114992271A (en) * | 2022-07-18 | 2022-09-02 | 上海秦耀航空试验技术有限公司 | Airplane vibration reduction component, aviation wall plate and band gap design method |
| CN114992271B (en) * | 2022-07-18 | 2022-11-18 | 上海秦耀航空试验技术有限公司 | Airplane vibration reduction component, aviation wall plate and band gap design method |
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