CN212053289U - Eddy current type damping device with large adjustable range based on sliding surface - Google Patents
Eddy current type damping device with large adjustable range based on sliding surface Download PDFInfo
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- CN212053289U CN212053289U CN201922276219.5U CN201922276219U CN212053289U CN 212053289 U CN212053289 U CN 212053289U CN 201922276219 U CN201922276219 U CN 201922276219U CN 212053289 U CN212053289 U CN 212053289U
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Abstract
The utility model discloses a can regulate and control the big eddy current type damping device of scope based on the glide plane relates to damping vibration attenuation technical field. The mass block and the eddy current damper are arranged in the shell of the eddy current type damping device; the upper part of the base in the shell forms a concave curved surface with a smooth surface; the bottom of the mass block forms an outward convex curved surface to enable the mass block to be in contact with the surface of the base; the mass block is solid or a hollow cavity is formed in the mass block, and liquid is filled in the cavity to serve as a damping medium; the side of the mass block is horizontally provided with a spring to provide additional rigidity; the eddy current damper is connected between the shell and the mass block, so that the mass block can slide in the shell by taking the curved surface of the base as a sliding surface. The utility model provides a damping device can realize diversified dual damping, provides extra rigidity simultaneously and can regulate and control the scope in order to increase the frequency, is showing and is improving space utilization and damping efficiency, and eddy current damper sensitivity is high, easy to maintain.
Description
Technical Field
The utility model relates to a damping vibration attenuation technical field especially relates to a can regulate and control electric eddy current type damping device that scope is big based on slip surface.
Background
Tuned Mass Dampers (TMDs) are capable of providing a force of nearly equal frequency, opposite to the direction of motion of the structure, when the main structure is subjected to an external dynamic force, thereby partially or fully canceling the structural response caused by the external excitation. When the vibration damping device is applied, the purposes of reducing the vibration reaction of the main body structure and increasing the structural load capacity can be achieved by reasonably designing the mass, the rigidity and the damping coefficient.
The tuned mass damping device is generally divided into three major parts of a stiffness system, a mass system and a damping system from the component composition. The parts can form different types of damping devices through different combination modes. Taking a commonly-used tuned mass damping device as an example, under a conventional scheme, a mass system adopts a mass block, the bottom of the mass block is provided with a pulley, a rigidity system adopts a spring, and a damping system can adopt a rod type damper or a damping box or an eddy current damper. The above scheme has the following defects: 1) the sensitivity is not high. The bottom of the mass system needs to be provided with supporting members such as pulleys, and the supporting members have certain friction with the floor, so that the working state of the mass system needs an initial starting force, the mass system is difficult to react in time during small vibration, and the sensitivity is general. 2) Only can control the vibration in one direction or a plurality of specific opposite directions, and the complex vibration control requirement is difficult to meet. 3) Frequency adjustment can affect the damping effect. For example, when the frequency is adjusted by reducing the size of the mass, a reduction in the damping effect is caused, particularly when the mass is reduced.
Aiming at the problems, various sliding type and rolling type tuned mass damping devices based on a curved surface bearing platform are also provided in the prior art, but the damping structure is single, and the damping efficiency is difficult to improve.
Disclosure of Invention
The utility model aims to provide a: the defects of the prior art are overcome, and the sliding surface-based eddy current type damping device is provided. The utility model provides an eddy current type damping device can realize diversified dual damping, provides extra rigidity simultaneously and can regulate and control the scope in order to increase the frequency, is showing and is improving space utilization and damping efficiency to install eddy current damper on the quality system, can in time react small vibration, sensitivity is high and easy to maintain.
In order to achieve the above object, the utility model provides a following technical scheme:
an eddy current type damping device with a large adjustable range based on a sliding surface comprises a shell, a mass block and an eddy current damper which are arranged in the shell,
a base is installed in the shell, and an inward concave curved surface with a smooth surface is formed at the upper part of the base; the bottom of the mass block forms an outer convex curved surface, and the curvature of the outer convex curved surface is the same as that of the inner concave curved surface of the base so as to enable the mass block to be in contact with the surface of the base;
the mass block is solid or a hollow cavity is formed in the mass block, and liquid is filled in the cavity to serve as a damping medium;
a spring is horizontally arranged between the side part of the mass block and the shell to provide additional rigidity;
one end of the eddy current damper is connected to the shell, and the other end of the eddy current damper is connected to the mass block, so that the mass block can slide in the shell by taking the curved surface of the base as a sliding surface.
Furthermore, the springs arranged horizontally are in one or more groups, each group of springs comprises a plurality of springs arranged on the same horizontal plane, one end of each spring is connected with the mass block, and the other end of each spring is connected with the inner wall of the shell.
Furthermore, each group of springs comprises more than 3 springs, and a plurality of springs are uniformly arranged around the mass block in a central symmetry mode.
Furthermore, the springs are detachably arranged between the mass block and the inner wall of the shell, and the damping frequency is adjusted or assisted to be adjusted by replacing the springs with different stiffness.
Furthermore, an antifriction resistance plate or an antifriction resistance coating is arranged between the mass block and the base;
the upper part of the base forms an inward concave spherical surface, and the bottom of the mass block forms an outward convex spherical surface with the same radius as the spherical surface of the base.
Furthermore, the eddy current damper is arranged on the mass block and comprises a permanent magnet, magnet back iron, a conductor plate and conductor back iron, wherein the permanent magnet is positioned between the magnet back iron and the conductor plate; when the vibration is carried out, the conductor plate and the permanent magnet move relatively, the conductor plate cuts magnetic lines of force to generate eddy current to interact with the permanent magnet, and damping force for blocking the relative movement is generated.
Further, the conductor plate is movably mounted on the surface of the conductor back iron, so that the distance between the conductor plate and the surface of the conductor back iron can be adjusted, and the interval between the conductor plate and the permanent magnet is adjusted to adjust the damping force;
or the conductor back iron is movably arranged on the mass block, so that the distance between the conductor back iron and the mass block can be adjusted, and the interval between the conductor plate on the conductor back iron and the permanent magnet is adjusted to adjust the damping force.
Further, the shell comprises a main body frame and an enclosure steel plate, the main body frame forms a framework of the shell, and the enclosure steel plate forms the peripheral protection of the shell;
the conductor back iron is fixedly installed at the top of the mass block, the side part of the mass block is connected with the shell through one or more limiting structures, and the limiting structures can limit the mass block when the mass block slides so as to prevent the mass block from overturning.
Further, corresponding to base and quality piece are provided with the different indent formula curved surface of a plurality of radius of curvature and convex curved surface respectively, indent formula curved surface can be dismantled with the base and be connected, convex curved surface can be dismantled with the quality piece and be connected to can install the corresponding indent formula curved surface and the convex curved surface of radius of curvature on base and quality piece as required frequency of damping.
Further, the mass block is formed by mixing one or more of steel, lead blocks, concrete and grouting materials, or formed by mixing one or more of the steel, the lead blocks, the concrete and the grouting materials with liquid.
The utility model discloses owing to adopt above technical scheme, compare with prior art, as the example, have following advantage and positive effect:
1) the side face of the mass block is connected with a spring to provide extra rigidity, so that the adjustable range of frequency is increased, and the space is utilized to the greatest extent; the structure of the tuned mass damper and the structure of the tuned fluid damper are combined, so that multi-azimuth double vibration reduction can be realized; the mass block is directly placed on the base, and the vibration energy is consumed by sliding the sliding interface on the base, so that the vibration damping device is convenient to install and excellent in durability.
2) The stiffness and frequency of the damping device can be adjusted conveniently. The frequency of the product can be adjusted by changing or replacing the curvature radius of the curved surface base and the bottom of the mass block, and the frequency can also be adjusted by replacing the spring. Compared with the traditional scheme of adjusting the frequency by adjusting the size of the mass block, the method reduces the influence of frequency adjustment on the vibration reduction effect of the damping device.
3) The sliding surface can realize the sliding radius with any length in a smaller space range, and the size of the product can be greatly reduced.
4) The eddy current damper has no mechanical wear, no initial starting force, and is easy to maintain.
Drawings
Fig. 1 is a schematic structural diagram of an eddy current damping device according to an embodiment of the present invention.
Fig. 2 is a schematic layout diagram of a spring as an auxiliary stiffness system according to an embodiment of the present invention.
Fig. 3 is a schematic view illustrating an installation of the eddy current damping device in a building according to an embodiment of the present invention.
Fig. 4 is a cross-sectional view a-a in fig. 3.
Fig. 5 is a schematic view of a surface contact between the mass and the base according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of an eddy current damper according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of an operation of an eddy current damper according to an embodiment of the present invention.
Fig. 8 is an installation schematic diagram of a limiting structure of a mass block according to an embodiment of the present invention.
Fig. 9 is a schematic structural view illustrating the base and the housing connected by the elastic device according to an embodiment of the present invention.
Fig. 10 is a schematic structural view of a base with a replaceable curved surface according to an embodiment of the present invention.
Description of reference numerals:
an eddy current type damping device 100;
a housing 110;
a base 120, a bearing platform 120a, a curved surface replacing part 120b, a concave curved surface 121 and a friction reducing material 122;
a mass block 130, an outward convex curved surface 131, a damping medium 132, a shell 133, a cavity 134, and a friction reducing material 135;
an eddy current damper 140, a permanent magnet 141, a magnet back iron 142, a conductor plate 143, a conductor back iron 144, and a mounting bracket 145;
a resilient means 150;
a spring 160;
a limiting structure 190;
a communication tower 200;
the platform 210 is installed.
Detailed Description
The present invention discloses a sliding surface-based eddy current damping device with a wide controllable range, which is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that technical features or combinations of technical features described in the following embodiments should not be considered as being isolated, and they may be combined with each other to achieve better technical effects. In the drawings of the embodiments described below, the same reference numerals appearing in the respective drawings denote the same features or components, and may be applied to different embodiments. Thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
It should be noted that the structures, ratios, sizes, etc. shown in the drawings of the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, and any modifications of the structures, changes of the ratio relationships, or adjustments of the sizes should fall within the scope that the technical contents disclosed in the present invention can cover without affecting the functions and purposes that the present invention can achieve. The scope of the preferred embodiments of the present invention includes other implementations in which functions may be performed out of the order described or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
Examples
Referring to fig. 1, a schematic structural diagram of an eddy current damping device based on a sliding surface and having a large adjustable range is provided.
The eddy current damping apparatus 100 includes a housing 110, and a mass 130 and an eddy current damper 140 disposed in the housing 110.
A base 120 is installed in the housing 110, and an upper portion of the base 120 forms a concave curved surface 121 with a smooth surface.
The bottom of the mass 130 forms an outer convex curved surface 131, and the curvature of the outer convex curved surface 131 is the same as the curvature of the inner concave curved surface 121 of the base, so that the mass 130 makes surface contact with the base 120.
The mass 130 may be a solid structure or a liquid-filled structure.
Preferably, in this embodiment, a hollow cavity is formed in the mass 130, and a liquid is filled in the cavity as the damping medium 132.
A spring 160 is disposed horizontally between the sides of the mass 130 and the housing 110 to provide additional stiffness.
One end of the eddy current damper 140 is connected to the housing 110, and the other end of the eddy current damper 140 is connected to the mass 130, so that the mass 130 can slide in the housing 110 with the curved surface of the base as a sliding surface.
The spring 160 can provide a resilient support in the horizontal direction for the sliding motion of the mass, which acts as an auxiliary stiffness system in the eddy current damping device 100 to provide additional stiffness adjustment.
In this embodiment, the springs 160 arranged horizontally may be one or more groups, each group of springs includes a plurality of springs arranged on the same horizontal plane, one end of each spring is connected to the mass block, and the other end of each spring is connected to the inner wall of the housing.
Referring to fig. 2, each set of springs preferably includes more than 3 springs, and a plurality of springs are uniformly arranged around the mass block in a central symmetry manner.
Considering the adjustment of the auxiliary stiffness system to the frequency and the stiffness, the springs are detachably mounted between the mass block and the inner wall of the shell, and the damping frequency is adjusted or assisted to be adjusted by replacing the springs with different stiffness.
In use, the eddy current damping apparatus 100 is mounted on top of a tower mast structure. The shell 110 serves as a peripheral skeleton and a protective structure of the whole damping device, when the structure is excited by wind load or earthquake, along with the increase of the structural response, the mass block 130 slides in the concave curved surface of the base 120, so that a large damping force is firstly applied to the structure, a large amount of energy of the structure is consumed, and the vibration of the structure can be effectively controlled. At the same time, the damping medium, such as liquid water, within the mass 130 forms a tuned fluid damper with the mass 130, further controlling the vibration of the structure. Due to the fluid characteristic of the damping medium, the damping medium can flow in multiple directions under the action of vibration, so that dual vibration reduction control in multiple directions is realized, the vibration reduction effect is good, and the damping efficiency is remarkably improved. Further, the spring 160 is used as an auxiliary stiffness system to provide auxiliary stiffness adjustment, and the existence of the spring 160 increases the adjustable frequency range and utilizes the space to the maximum extent.
Referring to fig. 3, taking the communication tower 200 as an example, for example, by adding one or more eddy current damping devices 100 to the communication tower 200, when the main structure of the communication tower 200 is subjected to an external dynamic force (e.g., wind load), the eddy current damping devices 100 provide a force with a frequency close to or equal to that of the structure and opposite to the moving direction of the structure, so as to partially or completely cancel the structural response caused by the external excitation. For optimal damping, the frequency of the damping device is preferably adjusted to be close to the frequency of the tower mast structure.
The eddy current damping device 100 can be installed on the communication tower 200 in a centrosymmetric manner by the installation platform 210, as shown in fig. 4, which illustrates a manner of providing 3 eddy current damping devices 100.
In this embodiment, in order to improve the sensitivity of the damping device, preferably, an anti-friction plate or an anti-friction coating is further disposed between the mass block and the base to reduce the friction force, so that the eddy current damping device 100 can be started even when the external excitation is small.
Referring to fig. 5, a method of providing the friction reducing material 122 on the surface of the concave curved surface 121 of the base 120 and providing the friction reducing material 135 on the surface of the convex curved surface 131 of the mass 130 is illustrated. Specifically, the mass 130 includes a housing 133, the housing 133 forms an inner cavity 134, the cavity 134 is filled with a damping medium 132, and a friction reducing layer is mounted on a surface of the convex curved surface 131.
By way of example and not limitation, the friction reducing material 122 may be a lubricant coating, the friction reducing material 135 may be a graphite layer, a bronze graphite layer, a teflon layer, etc., and of course, a metal-plastic composite material may be used as the friction reducing material 135 according to the requirement, which should not be construed as a limitation to the present invention.
Preferably, the upper portion of the base 120 forms an inner concave spherical surface, and the bottom of the mass block 130 forms an outer convex spherical surface with the same radius as the spherical surface of the base, so that the curvatures of the inner concave curved surface and the outer convex curved surface are the same constant and have the same radius of curvature, which is convenient for the processing and manufacturing of the base and the mass block.
In this embodiment, the eddy current damper 140 is mounted on the upper portion of the mass.
Specifically, referring to fig. 6, the eddy current damper 140 may include a permanent magnet 141, a magnet back iron 142, a conductor plate 143, and a conductor back iron 144, the permanent magnet 141 being located between the magnet back iron 142 and the conductor plate 143. When the vibration is generated, the conductor plate 143 and the permanent magnet 141 move relatively, the conductor plate 143 cuts magnetic lines of force to generate an eddy current to interact with the permanent magnet 141, and a damping force for blocking the relative movement is generated.
In the scheme, the movement mechanical energy is converted into the electric energy of the conductor plate through the electric eddy current damper, and then the electric energy is finally converted into the heat energy through the resistor of the conductor plate to be consumed, so that the damping effect is generated. The eddy current damper not only can realize non-contact and no mechanical abrasion, but also does not need initial starting force, and has the advantages of simple structure, low maintenance requirement and good durability.
During installation, one side of the conductor back iron 144 can be fixedly installed on the mass block, and the other side opposite to the side is provided with the conductor plate 143; the magnet back iron 142 may be fixedly mounted on the inner wall of the housing 110 by a mounting bracket 145, and a pair of permanent magnets 141 are mounted on the surface of the magnet back iron 142 at intervals apart from the conductor plate 143 (disposed at intervals from the conductor plate). The magnetic poles of the permanent magnet pairs are arranged in an inverted manner, when the conductor plate 143 and the permanent magnet 141 move relatively, the conductor plate 143 cuts magnetic lines of force to generate an eddy current, and the eddy current interacts with the permanent magnet 141 to generate a damping force for blocking the relative movement, as shown in fig. 7.
In the present embodiment, the interval between the conductor plate and the permanent magnet is adjustable in consideration of adjustment of the magnitude of the damping force.
In one embodiment, the conductor plate 143 is movably mounted on the surface of the conductor back iron 144, so that the distance between the conductor plate 143 and the surface of the conductor back iron 144 can be adjusted, thereby adjusting the spacing distance between the conductor plate 143 and the permanent magnet 141, and adjusting the damping force.
In another embodiment, the conductor back iron 144 is movably mounted on the mass, so that the distance between the conductor back iron 144 and the mass can be adjusted, thereby adjusting the spacing distance between the conductor plate 143 on the conductor back iron 144 and the permanent magnet 141 to adjust the magnitude of the damping force.
Of course, the mounting bracket 145 may also be provided as a length-adjustable bracket, as desired. By way of example and not limitation, the mounting bracket 145 may include a mounting beam for securing the magnet back iron 142 and a pair of bracket arms, one on each side of the mounting beam, with one end of the bracket arms attached to the mounting beam and the other end attached to the housing 110. The support arm is of a telescopic structure, and the height of the mounting beam is adjusted through the telescopic of the support arm, so that the spacing distance between the permanent magnet on the magnet back iron 142 and the conductor plate is adjusted to adjust the damping force.
In this embodiment, the housing 110 includes a main frame and a steel enclosure plate, the main frame forms a framework of the housing, and the steel enclosure plate forms a peripheral protection of the housing.
Specifically, the enclosure steel plate can include roof, bottom plate and side wall board, according to shell 110's shape, side wall board can constitute circularly, also can constitute squarely, or other shapes, and it should not regard as right the utility model discloses a restriction.
The conductor back iron 144 is fixedly mounted on top of the mass 130. Considering that the mass block 130 arranged on the concave curved surface may turn over due to the sliding of the curved surface when the structure vibrates greatly, the side part of the mass block 130 may be connected to the housing through one or more limiting structures 190, and the limiting structures 190 can limit the mass block to prevent the mass block from falling down when the mass block slides.
Specifically, as a typical distance, referring to fig. 8, the limiting structure 190 is a symmetrically arranged elastic element, such as a spring, which is symmetrically arranged between the mass and the housing horizontally or obliquely, one end of the spring is fixedly installed on the mass, the other end of the spring is fixedly installed on the inner wall of the housing, and the symmetrically arranged spring can limit the inclination angle of the center of gravity of the mass 130 when the mass 130 slides, so as to prevent the mass 130 from rolling over and causing the eddy current damper to fail.
Preferably, the position limiting structure 190 is mounted on the upper region of the mass, and the height of the mounting point on the mass is greater than the height of the center of gravity G of the mass.
Referring to fig. 9, the lower portion of the base 120 is mounted on the bottom plate, and the side portions of the base 120 may be elastically coupled to the sidewall plates by elastic means 150. The elastic device 150 is used for limiting the base at the bottom of the housing 110 and simultaneously performing vibration isolation connection on the housing and the base, and preferably, the elastic device 150 can adopt a rubber ring or a silica gel ring which is sleeved between the mass block and the housing and is in close contact with the mass block and the housing.
In this embodiment, the frequency of the whole damping device can be adjusted by adjusting the curvature radius of the curved surface.
According to the structural dynamics, the damping device belongs to a single-degree-of-freedom system, and the calculation formula of the frequency of the damping device is as follows:
wherein ω is the circular frequency; k is stiffness; m is mass; f is the frequency.
The sliding motion of the mass block on the spherical surface is similar to swinging motion, the curvature radius of the curved surface is taken as the swing length, and the calculation formula of the rigidity k is as follows:
wherein g is the acceleration of gravity; and L is the curvature radius of the curved surface.
By integrating the formulas (1) to (3), the final frequency calculation formula is obtained by calculation as follows
As can be seen from the equation (4), the frequency is related to the curvature radius, i.e. the frequency of the damping device can be adjusted by adjusting the curvature radius of the curved surface.
With the addition of spring 160, spring 160 provides additional stiffness, such that the stiffness of the spring is k2The total rigidity is as follows
k＝kCurved surface+k2 (5)
The final frequency calculation formula is obtained by combining the formulas, and the following steps are carried out
As can be seen from the formula (6), the frequency of the damping device can be adjusted by replacing the spring.
The base is provided with a plurality of concave curved surfaces with different curvature radiuses, the concave curved surfaces are detachably connected with the base, the convex curved surfaces are detachably connected with the mass block, and therefore the concave curved surfaces and the convex curved surfaces which correspond to the curvature radiuses can be installed on the base and the mass block according to required vibration absorption frequency.
The detachable connection mode is one or more of threaded connection, bolt connection, buckle connection, magnetic adsorption connection and sticking connection.
The operation of replacing the curved surface will be described below by taking the base 120 as an example. As an example of a preferable mode, referring to fig. 10, the base includes a supporting platform 120a and a plurality of curved surface replacing portions 120b, a pair of inverted L-shaped buckles is disposed on the supporting platform 120a, a pair of inverted L-shaped slots is disposed at the bottom of the curved surface replacing portion 120b corresponding to the inverted L-shaped buckles, when replacement is required, the curved surface replacing portion 120b to be replaced may be pushed out in a horizontal direction to separate the inverted L-shaped buckles from the inverted L-shaped slots for unlocking, and then, other curved surface replacing portions 120b with different curvatures are mounted through the buckles and the slots.
The mass block is formed by mixing one or more of steel, lead block, concrete and grouting material, or formed by mixing one or more of the steel, lead block, concrete and grouting material with liquid.
When the hollow cavity is arranged, the shell of the mass block can be formed by mixing one or more of steel, lead blocks, concrete and grouting materials. The damping medium is preferably a readily available liquid, such as water.
In the description above, the disclosure of the present invention is not intended to limit itself to these aspects. Rather, the various components may be selectively and operatively combined in any number within the intended scope of the present disclosure. In addition, terms like "comprising," "including," and "having" should be interpreted as inclusive or open-ended, rather than exclusive or closed-ended, by default, unless explicitly defined to the contrary. All technical, scientific, or other terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. Common terms found in dictionaries should not be interpreted too ideally or too realistically in the context of related art documents unless the present disclosure expressly limits them to that. Any alterations and modifications of the present invention based on the above disclosure will be apparent to those skilled in the art from the present disclosure, and all such modifications and modifications are intended to fall within the scope of the appended claims.
Claims (10)
1. The utility model provides a can regulate and control big eddy current type damping device of scope based on slip surface, includes the shell to and set up quality piece and eddy current damper in the shell, its characterized in that:
a base is installed in the shell, and an inward concave curved surface with a smooth surface is formed at the upper part of the base;
the bottom of the mass block forms an outer convex curved surface, and the curvature of the outer convex curved surface is the same as that of the inner concave curved surface of the base so as to enable the mass block to be in contact with the surface of the base;
the mass block is solid or a hollow cavity is formed in the mass block, and liquid is filled in the cavity to serve as a damping medium;
a spring is horizontally arranged between the side part of the mass block and the shell to provide additional rigidity;
one end of the eddy current damper is connected to the shell, and the other end of the eddy current damper is connected to the mass block, so that the mass block can slide in the shell by taking the curved surface of the base as a sliding surface.
2. An eddy current damper apparatus as claimed in claim 1, wherein: the springs arranged horizontally are in one group or multiple groups, each group of springs comprises a plurality of springs arranged on the same horizontal plane, one end of each spring is connected with the mass block, and the other end of each spring is connected with the inner wall of the shell.
3. An eddy current damper apparatus according to claim 2, wherein: each group of springs comprises more than 3 springs, and a plurality of springs are uniformly arranged around the mass block in a central symmetry mode.
4. An eddy current damper apparatus as claimed in claim 1, wherein: the springs are detachably arranged between the mass block and the inner wall of the shell, and the damping frequency is adjusted or assisted to be adjusted by replacing the springs with different stiffness.
5. An eddy current damper apparatus as claimed in claim 1, wherein: an antifriction resistance plate or an antifriction resistance coating is also arranged between the mass block and the base;
the upper part of the base forms an inward concave spherical surface, and the bottom of the mass block forms an outward convex spherical surface with the same radius as the spherical surface of the base.
6. An eddy current damper apparatus as claimed in claim 1, wherein: the eddy current damper is arranged on the mass block and comprises a permanent magnet, magnet back iron, a conductor plate and conductor back iron, wherein the permanent magnet is positioned between the magnet back iron and the conductor plate; when the vibration is carried out, the conductor plate and the permanent magnet move relatively, the conductor plate cuts magnetic lines of force to generate eddy current to interact with the permanent magnet, and damping force for blocking the relative movement is generated.
7. An eddy current damper apparatus as claimed in claim 6, wherein: the conductor plate is movably arranged on the surface of the conductor back iron, so that the distance between the conductor plate and the surface of the conductor back iron can be adjusted, and the interval between the conductor plate and the permanent magnet is adjusted to adjust the damping force;
or the conductor back iron is movably arranged on the mass block, so that the distance between the conductor back iron and the mass block can be adjusted, and the interval between the conductor plate on the conductor back iron and the permanent magnet is adjusted to adjust the damping force.
8. An eddy current damper apparatus as claimed in claim 6, wherein: the shell comprises a main body frame and an enclosure steel plate, the main body frame forms a framework of the shell, and the enclosure steel plate forms the peripheral protection of the shell;
the conductor back iron is fixedly installed at the top of the mass block, the side part of the mass block is connected with the shell through one or more limiting structures, and the limiting structures can limit the mass block when the mass block slides so as to prevent the mass block from overturning.
9. An eddy current damper apparatus as claimed in claim 1, wherein: the base is provided with a plurality of concave curved surfaces with different curvature radiuses, the concave curved surfaces are detachably connected with the base, the convex curved surfaces are detachably connected with the mass block, and therefore the concave curved surfaces and the convex curved surfaces which correspond to the curvature radiuses can be installed on the base and the mass block according to required vibration absorption frequency.
10. An eddy current damping device according to any one of claims 1 to 9, wherein: the mass block is formed by mixing one or more of steel, lead block, concrete and grouting material, or formed by mixing one or more of the steel, lead block, concrete and grouting material with liquid.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113513099A (en) * | 2021-04-29 | 2021-10-19 | 合肥工业大学 | Tuned mass damper for tower |
| CN115961650A (en) * | 2022-11-02 | 2023-04-14 | 兰州理工大学 | Vibration control device for reducing earthquake response of adjacent liquid storage tanks and vibration control method thereof |
| CN117052006A (en) * | 2023-09-11 | 2023-11-14 | 宁夏大学 | Friction pendulum type eddy current damping tuned mass damper and design method and application thereof |
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2019
- 2019-12-17 CN CN201922276219.5U patent/CN212053289U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113513099A (en) * | 2021-04-29 | 2021-10-19 | 合肥工业大学 | Tuned mass damper for tower |
| CN113513099B (en) * | 2021-04-29 | 2022-11-29 | 合肥工业大学 | Tuned mass damper for tower |
| CN115961650A (en) * | 2022-11-02 | 2023-04-14 | 兰州理工大学 | Vibration control device for reducing earthquake response of adjacent liquid storage tanks and vibration control method thereof |
| CN115961650B (en) * | 2022-11-02 | 2024-03-01 | 兰州理工大学 | Vibration control device for reducing earthquake response of adjacent liquid storage tanks and vibration control method thereof |
| CN117052006A (en) * | 2023-09-11 | 2023-11-14 | 宁夏大学 | Friction pendulum type eddy current damping tuned mass damper and design method and application thereof |
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Address after: 214104 Room 308, block C, Xidong chuangrong building, No. 88, Danshan Road, anzhen street, Xishan District, Wuxi City, Jiangsu Province Patentee after: Wuxi Jiangu earthquake reduction and Isolation Technology Co.,Ltd. Address before: Room 1202t, No. 100, Guokang Road, Yangpu District, Shanghai 200092 Patentee before: SHANGHAI JIANGU DAMPING TECHNOLOGY CO.,LTD. |
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