Eddy current type plane multidirectional bridge damping and energy dissipation system

Abstract

The invention relates to an eddy current type plane multidirectional bridge damping and energy dissipation system which comprises a center shaft, an upper metal disc gear assembly, a lower metal disc gear assembly, a fixing plate, a first rack, a second rack and a sliding rod piece, the fixing plate is fixedly connected with the center shaft, and the upper metal disc gear assembly and the lower metal disc gear assembly are arranged on the upper side and the lower side of the fixing plate respectively and rotationally connected with the center shaft; the first rack and the second rack are perpendicular to each other, are in sliding fit with the upper side face and the lower side face of the fixing plate respectively and are meshed with gears on the upper metal disc gear assembly and the lower metal disc gear assembly respectively, and the sliding rod piece is provided with a transverse connecting part and a longitudinal connecting part which are in sliding fit with the second rack and the first rack respectively. And a permanent magnet is arranged on the fixed plate so as to cut magnetic induction lines to generate induction current when the metal disc gear assembly rotates, and then eddy current damping force is generated to slow down or hinder continuous rotation of the metal disc gear assembly. The system has a multidirectional energy consumption function, is free of frictional wear and contact damping, and is simple in structure and low in implementation cost.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge shock absorption, and in particular relates to an eddy current type plane multi-directional bridge shock absorption and energy dissipation system. Background Art

[0002] In recent decades, with the rapid progress of bridge construction technology around the world, a large number of bridge engineering projects have been successfully built. However, with the continuous development of society, more stringent requirements have been put forward for the seismic performance of bridge structures. Therefore, the research and development and application of seismic devices have become the focus of academic and engineering circles, aiming to effectively reduce the potential damage of earthquakes to bridge structures, thereby ensuring the safe use and normal operation of bridges under earthquake conditions.

[0003] In the prior art, scholars have proposed various types of shock absorbing devices, among which the more commonly used ones include rubber isolation bearings, friction pendulum bearings, viscous dampers and friction dampers. These devices mainly consume energy in a contact manner, but may suffer a certain degree of loss during cyclic loading, which leads to a reduction in the energy consumption effect. In recent years, scholars have proposed a new type of eddy current damper, which exhibits better stability than traditional shock absorbing devices. However, the current eddy current damper design is mostly aimed at consuming energy in a single direction and lacks the function of bidirectional energy consumption. The occurrence of earthquakes is random and variable, and usually causes the structure to displace in multiple directions. If effective energy consumption is required in multiple directions, shock absorbing devices need to be installed in multiple directions, which undoubtedly increases the overall cost of the shock absorbing system. Therefore, it is necessary to develop an eddy current shock absorbing device with multi-directional energy dissipation effect to solve the problems existing in the prior art. Summary of the invention

[0004] The purpose of the present invention is to provide an eddy current planar multi-directional bridge shock absorption and energy dissipation system, which has a multi-directional energy dissipation function, no friction and wear, no contact damping, improves the energy dissipation efficiency and shock absorption stability, and has a simple structure and low implementation cost.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an eddy current planar multi-directional bridge shock absorption and energy dissipation system, including a central shaft, an upper metal plate gear assembly, a lower metal plate gear assembly, a fixed plate, a first rack, a second rack and a sliding rod. The fixed plate is fixedly connected to the middle of the central shaft, and the upper metal plate gear assembly and the lower metal plate gear assembly are respectively arranged on the upper and lower sides of the fixed plate and are respectively rotatably connected to the central shaft. The second rack and the first rack are arranged perpendicular to each other and are respectively located between the fixed plate and the upper and lower metal plate gear assemblies. The second rack and the first rack are respectively slidably matched with the upper and lower sides of the fixed plate, and The teeth thereon mesh with the gears on the upper and lower metal plate gear assemblies respectively. The sliding rod is arranged between the fixed plate and the upper metal plate gear assembly. The sliding rod has a transverse connecting portion and a longitudinal connecting portion, and the transverse connecting portion and the longitudinal connecting portion are respectively slidably matched with the second rack and the first rack; a permanent magnet is arranged on the fixed plate to cut the magnetic flux lines of the permanent magnet when the upper and lower metal plate gear assemblies rotate relative to the fixed plate to generate an induced current, thereby generating an eddy current damping force to slow down or hinder the continuous rotation of the upper and lower metal plate gear assemblies; the central axis is fixedly connected to the bridge pier, and the sliding rod is fixedly connected to the main beam.

[0006] Furthermore, the lower metal plate gear assembly is composed of a first metal plate, a first hollow short column and a first gear, the first gear is located on the upper side of the first metal plate, and the first metal plate and the first gear are respectively fixedly connected to the outer periphery of the first hollow short column, and the first hollow short column is rotatably connected to the lower section of the central shaft through the first bearing group, thereby realizing the rotation of the lower metal plate gear assembly relative to the rotating shaft and the fixed plate; the upper metal plate gear assembly is composed of a second metal plate, a second hollow short column and a second gear, the second gear is located on the lower side of the second metal plate, and the second metal plate and the second gear are respectively fixedly connected to the outer periphery of the second hollow short column, and the second hollow short column is rotatably connected to the upper section of the central shaft through the second bearing group, thereby realizing the rotation of the upper metal plate gear assembly relative to the rotating shaft and the fixed plate.

[0007] Furthermore, a through hole is provided in the middle of the first metal plate, and the central axis passes downward through the through hole in the middle of the first metal plate and is fixedly connected to the bridge pier.

[0008] Furthermore, the lower side surface and the upper side surface of the fixed plate are respectively provided with a first sliding groove group and a second sliding groove group, the first rack is slidably matched with the first sliding groove group, and the second rack is slidably matched with the second sliding groove group.

[0009] Furthermore, the first sliding groove group and the second sliding groove group respectively include two horizontally arranged sliding grooves, the setting direction of the two sliding grooves of the first sliding groove group is the same as the sliding direction of the first rack, and the setting direction of the two sliding grooves of the second sliding groove group is the same as the sliding direction of the second rack; the two sliding grooves on the same sliding groove group are respectively arranged at a set distance close to the edge of the fixed plate to increase the space for setting the permanent magnet on the fixed plate and the range of reciprocating motion of the rack; the first rack includes a first tooth portion in the middle and a first sliding rod portion located on the left and right sides of the first tooth portion, the first tooth portion is meshed with the first gear on the lower metal disk gear assembly, and the first sliding rod portions on the left and right sides are respectively slidably matched with the two sliding grooves of the first sliding groove group; the second rack includes a second tooth portion in the middle and a second sliding rod portion located on the left and right sides of the second tooth portion, the second tooth portion is meshed with the second gear on the upper metal disk gear assembly, and the second sliding rod portions on the left and right sides are respectively slidably matched with the two sliding grooves of the second sliding groove group.

[0010] Furthermore, both left and right ends of the first rack and the second rack are provided with stoppers, and the outer dimensions of the stoppers are larger than the inner hole dimensions of the sliding groove to prevent the racks from sliding off due to excessive displacement.

[0011] Furthermore, the sliding rod is composed of a main beam connecting part, a transverse connecting part and a longitudinal connecting part. The transverse connecting part and the longitudinal connecting part are perpendicular to each other and are connected to the main beam connecting part as a whole. The main beam connecting part is fixedly connected to the main beam. The extension direction of the transverse connecting part is perpendicular to the sliding direction of the second rack, and the extension direction of the longitudinal connecting part is perpendicular to the sliding direction of the first rack.

[0012] Furthermore, a first connecting column and a second connecting column are respectively provided on the first rack and the second rack; a second sliding guide groove is provided on the upper edge of the transverse connecting part perpendicular to the sliding direction of the second rack, and the second connecting column of the second rack is embedded in the second sliding guide groove to achieve sliding cooperation between the second rack and the transverse connecting part; a first sliding guide groove is provided on the upper edge of the longitudinal connecting part perpendicular to the sliding direction of the first rack, and the first connecting column of the first rack is embedded in the first sliding guide groove to achieve sliding cooperation between the first rack and the longitudinal connecting part; a strip hole is provided on the upper edge of the fixed plate within the sliding range of the first connecting column, and the first connecting column passes through the strip hole upward and is embedded in the first sliding guide groove.

[0013] Furthermore, the permanent magnet array is embedded in the fixed plate.

[0014] Furthermore, a plurality of fan-shaped permanent magnet arrays are arranged in a circumferential array on the fixed plate, and each fan-shaped permanent magnet array is composed of a plurality of fan-shaped permanent magnets that increase in size radially from the inside to the outside; the N poles and S poles of adjacent fan-shaped permanent magnets are arranged in opposite directions up and down to achieve different magnetic properties of adjacent fan-shaped permanent magnet poles.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention realizes a bidirectional energy dissipation design. By assembling upper and lower metal disc gear assemblies that can rotate independently of each other, the energy that causes displacement in a single direction, left and right and front and back, is effectively dissipated, thereby realizing the bidirectional energy dissipation function of the device. Specifically, the upper metal disc gear assembly is used to dissipate the energy of displacement in the left and right directions, and the lower metal disc gear assembly is used to dissipate the energy of displacement in the front and back directions. When the structure undergoes bidirectional displacement, the upper and lower metal disc gear assemblies rotate independently of each other and dissipate the energy in the corresponding directions, respectively, thereby effectively dissipating the energy that causes the bidirectional displacement. This design not only significantly improves the efficiency of energy dissipation, but also effectively enhances the stability of the device when dealing with complex seismic effects.

[0016] 2. The present invention converts the translation of the structure into rotation through gears. First, the speed of cutting magnetic flux lines is increased. Second, the structure of the permanent magnet is fully covered by a metal disk, which ensures that the magnetic flux is maintained at the maximum value, thereby effectively increasing the damping force. In addition, the present invention can flexibly set the permanent magnet arrangement to achieve the regulation of the damping ratio. By appropriately amplifying the damping ratio, the eddy current damping force can be effectively increased, thereby improving the overall energy consumption effect.

[0017] 3. The present invention adopts an eddy current damping mechanism, wherein the eddy current damping is a non-contact damping. This non-contact design has no friction loss, thereby giving the device higher durability and operational stability.

[0018] 4. The present invention is based on the principle of correlation between damping force and speed. By adjusting the size of the gear meshing with the rack, the gear rotates more times and faster when the rack slides with the same displacement, thereby changing the rotation speed and number of turns of the upper and lower metal plate gear assemblies, thereby increasing the eddy current damping force and ultimately achieving the purpose of reducing structural displacement.

[0019] 5. The energy-consuming structure realized by the present invention will produce eddy current damping effect during operation. The energy consumption in this process can be simulated in numerical analysis. By decomposing the horizontal bidirectional movement into two vertical components, the energy consumption effects in these two directions can be independently calculated and evaluated using precise numerical analysis methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the system structure of an embodiment of the present invention (the second metal plate 31 is hidden); Figure 2 is a schematic diagram of the system structure of an embodiment of the present invention (from another perspective); Figure 3 is a top view of the lower metal plate gear assembly in an embodiment of the present invention; Figure 4 is a three-dimensional view of the lower metal plate gear assembly in an embodiment of the present invention; Figure 5 is a bottom view of the upper metal plate gear assembly in an embodiment of the present invention; Figure 6 is a three-dimensional view of an upper metal plate gear assembly according to an embodiment of the present invention; Figure 7 is a schematic diagram of the matching relationship between the sliding rod and the rack in an embodiment of the present invention; Figure 8 is a schematic diagram of the arrangement structure of the permanent magnets on the fixed plate in an embodiment of the present invention; Fig. 9 is a schematic diagram of the lateral displacement of the sliding rod in an embodiment of the present invention; Fig.10 is a schematic diagram of the longitudinal displacement of the sliding rod in an embodiment of the present invention; Fig.11 Schematic diagram of bidirectional displacement of the sliding rod in an embodiment of the present invention.

[0021] In the figure: 1, central axis; 2, lower metal disc gear assembly; 21, first metal plate; 22, first hollow short column; 23, first gear; 3, upper metal disc gear assembly; 31, second metal plate; 32, second hollow short column; 33, second gear; 41, first bearing group; 42, second bearing group; 5, fixed plate; 51, strip hole; 61, first sliding groove group; 62, second sliding groove group; 7, permanent magnet; 81, first rack; 82, second rack; 91, first connecting column; 92, second connecting column; 10, sliding rod; 101, first sliding guide groove; 102, second sliding guide groove. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] like Figure 1-11 As shown, this embodiment provides an eddy current planar multi-directional bridge shock absorption and energy dissipation system, including a central axis 1, an upper metal plate gear assembly 3, a lower metal plate gear assembly 2, a fixed plate 5, a first rack 81, a second rack 82 and a sliding rod 10. The fixed plate 5 is fixedly connected to the middle of the central axis 1, the upper metal plate gear assembly 3 and the lower metal plate gear assembly 2 are respectively arranged on the upper and lower sides of the fixed plate 5 and are respectively rotatably connected to the central axis 1, the second rack 82 and the first rack 81 are arranged perpendicular to each other, and the second rack 82 is located between the fixed plate 5 and the upper metal plate gear assembly 3, the first rack 81 is located between the fixed plate 5 and the lower metal plate gear assembly 2, the second rack 82 and the first rack 81 are respectively slidably matched with the upper and lower sides of the fixed plate 5, and the second rack 8 2 is meshed with the gear on the upper metal plate gear assembly 3, and the gear on the first rack 81 is meshed with the gear on the lower metal plate gear assembly 2. The sliding rod 10 is arranged between the fixed plate 5 and the upper metal plate gear assembly 3. The sliding rod 10 has a transverse connecting portion and a longitudinal connecting portion, and the transverse connecting portion and the longitudinal connecting portion are respectively slidably matched with the second rack 82 and the first rack 81; a permanent magnet 7 is arranged on the fixed plate 5 to cut the magnetic flux lines of the permanent magnet 7 when the upper metal plate gear assembly 3 and the lower metal plate gear assembly 2 rotate relative to the fixed plate 5 to generate an induced current, thereby generating an eddy current damping force to slow down or hinder the continuous rotation of the upper and lower metal plate gear assemblies; the central axis 1 is fixedly connected to the bridge pier, and the sliding rod 10 is fixedly connected to the main beam.

[0026] like Figure 3 , 4 As shown, the lower metal plate gear assembly 2 is composed of a first metal plate 21, a first hollow short column 22 and a first gear 23. The first gear 23 is located on the upper side of the first metal plate 21, and the first metal plate 21 and the first gear 23 are respectively fixedly connected to the outer periphery of the first hollow short column 22. The first hollow short column 22 is rotatably connected to the lower section of the central shaft 1 through the first bearing group 41, thereby realizing the rotation of the lower metal plate gear assembly relative to the rotating shaft and the fixed plate. Figure 5 , 6 As shown, the upper metal plate gear assembly 3 is composed of a second metal plate 31, a second hollow short column 32 and a second gear 33. The second gear 33 is located at the lower side of the second metal plate 31, and the second metal plate 31 and the second gear 33 are respectively fixedly connected to the outer periphery of the second hollow short column 32. The second hollow short column 32 is rotatably connected to the upper section of the central shaft 1 through the second bearing group 42, thereby realizing the rotation of the upper metal plate gear assembly relative to the rotating shaft and the fixed plate. The first gear 23 and the second gear 33 can change the rotation speed of the upper and lower metal plate gear assemblies by adjusting the size, thereby realizing the adjustment of the size of the eddy current damping force.

[0027] In this embodiment, the upper metal disc gear assembly 3 and the lower metal disc gear assembly 2 are copper disc gear assemblies, wherein the second metal plate 31 and the first metal plate 21 are made of copper, but are not limited thereto, and may also be other metal materials that can generate eddy currents.

[0028] The first metal plate 21 has a through hole in the middle, and the central axis 1 passes downward through the through hole in the middle of the first metal plate 21 and is fixedly connected to the bridge pier. The second metal plate 31 does not need to have a through hole, and the central axis 1 does not need to penetrate the second metal plate 31 upward.

[0029] The lower side surface and the upper side surface of the fixing plate 5 are respectively provided with a first sliding groove group 61 and a second sliding groove group 62 . The first rack 81 is slidably matched with the first sliding groove group 61 , and the second rack 82 is slidably matched with the second sliding groove group 62 .

[0030] like Figure 7 As shown, the first sliding groove group 61 and the second sliding groove group 62 respectively include two horizontally arranged sliding grooves, the arrangement direction of the two sliding grooves of the first sliding groove group 61 is the same as the sliding direction of the first rack 81, and the arrangement direction of the two sliding grooves of the second sliding groove group 62 is the same as the sliding direction of the second rack 82. The two sliding grooves on the same sliding groove group are respectively arranged at positions close to the edge of the fixed plate at a set distance to increase the space for the permanent magnet to be arranged on the fixed plate and the range of reciprocating motion of the rack. The first rack 81 includes a first tooth portion in the middle and a first slide bar portion located on the left and right sides of the first tooth portion, the first tooth portion faces the first gear 23 on the lower metal plate gear assembly 2 and meshes with the first gear 23, and the first slide bars on the left and right sides respectively slide with the two slide grooves of the first slide groove group 61; the second rack 82 includes a second tooth portion in the middle and a second slide bar portion located on the left and right sides of the second tooth portion, the second tooth portion faces the second gear 33 on the upper metal plate gear assembly 3 and meshes with the second gear 33, and the second slide bars on the left and right sides respectively slide with the two slide grooves of the second slide groove group 62, so that when the first rack 81 and the second rack 82 slide, the lower metal plate gear assembly 2 and the upper metal plate gear assembly 3 are driven to rotate respectively. In order to realize the forward and reverse movement of the rack, a length is reserved at both ends of the first rack 81 and the second rack 82, and each reserved length is d / 2, that is, the maximum displacement of single-direction sliding is d / 2. Moreover, both left and right ends of the first rack 81 and the second rack 82 are provided with stoppers, the outer dimensions of which are larger than the inner hole dimensions of the sliding groove, so as to prevent the racks from sliding due to excessive displacement.

[0031] like Figure 7As shown, the sliding rod 10 is composed of a main beam connection part, a transverse connection part and a longitudinal connection part. The transverse connection part and the longitudinal connection part are perpendicular to each other and connected to the main beam connection part as a whole. The main beam connection part is fixedly connected to the main beam. The extension direction of the transverse connection part is perpendicular to the sliding direction of the second rack, and the extension direction of the longitudinal connection part is perpendicular to the sliding direction of the first rack. A first connecting column 91 is provided on the first rack 81, and a second connecting column 92 is provided on the second rack 82. A second sliding guide groove 102 is provided on the upper edge of the transverse connection part perpendicular to the sliding direction of the second rack, and the second connecting column 92 of the second rack 82 is embedded in the second sliding guide groove 102 to achieve sliding cooperation between the second rack and the transverse connection part. A first sliding guide groove 101 is provided on the upper edge of the longitudinal connection part perpendicular to the sliding direction of the first rack, and the first connecting column 91 of the first rack 81 is embedded in the first sliding guide groove 101 to achieve sliding cooperation between the first rack and the longitudinal connection part.

[0032] In order to allow the first connecting column 91 to pass through the fixed plate 5 and slide, a strip hole 51 is provided on the fixed plate 5 along the sliding range of the first connecting column, and the first connecting column 91 passes through the strip hole 51 upward and is embedded in the first sliding guide groove 101, so that it can slide smoothly in the strip hole 51. The length of the strip hole 51 is d, and the maximum displacement of the unidirectional structure that can be achieved is d / 2.

[0033] The first sliding guide groove 101 and the second sliding guide groove 102 may not be through-through, and a certain thickness not through-through is reserved at the top, so as to improve the rigidity of the sliding rod 10 .

[0034] The sliding rod 10 can move in any direction in the plane, and the movement can be decomposed into two directions, front and back and left and right. The sliding rod 10 is similar to a "T" shape, and the first sliding guide groove 101 and the second sliding guide groove 102 are respectively opened in the longitudinal connection part and the transverse connection part of vertical equal length. The first connecting column 91 can slide in the first sliding guide groove 101 and can also push the first connecting column 91 to move forward and backward. The second connecting column 92 can slide in the second sliding guide groove 102 and can also push the second connecting column 92 to move left and right. In this way, the horizontal bidirectional movement of the sliding rod 10 is decomposed into the front and back movement of the first connecting column 91 and the left and right movement of the second connecting column 92.

[0035] like Figure 1As shown, when moving in the front-back or left-right direction, the innermost side of the sliding rod 10 can reach the outer edge of the second hollow short column 32, and the outermost side can reach the inner edge of the sliding groove on the same side, and the movement distance is d. A better design scheme is that a length is reserved at both ends of the first rack 81 and the second rack 82, and each reserved length is d / 2, that is, the maximum distance of single-direction sliding is d / 2. The strip hole 51 is the movement trajectory of the first connecting column 91, and the length is d. The center of the strip hole 51 is preferably designed at the initial position of the first connecting column 91 to achieve equal displacement capacity in both positive and negative directions. The length of the two equal and vertical side grooves of the sliding rod 10 is d. The initial position of the first connecting column 91 is located at the center of the horizontal distance between the outer edge of the rear side of the first hollow short column 22 and the inner edge of the rear sliding groove of the first sliding groove group 61 along the axial direction of the first rack 81. The initial position of the second connecting column 92 is located at the center of the horizontal distance between the right outer edge of the second hollow short column 32 and the right inner edge of the sliding groove of the second sliding groove group 62 along the axial direction of the second rack 82. The initial positions of the first sliding guide groove 101 and the second sliding guide groove 102 of the sliding rod 10 are respectively located at the top center of the first connecting column 91 and the second connecting column 92. When the structure is displaced, the first connecting column 91 and the second connecting column 92 can slide and adjust in the first sliding guide groove 101 and the second sliding guide groove 102 respectively according to the movement state of the structure.

[0036] A plurality of permanent magnets 7 may be disposed on the fixing plate 5, and the array of the permanent magnets 7 is embedded in the fixing plate 5. The cross-sectional shape of a single permanent magnet 7 may be in the form of an arc, a rectangle, a circle, etc., and the permanent magnets 7 may be arranged in an array in the form of a circle, a rectangle, etc., and may be arranged in a single ring or multiple rings. To facilitate the arrangement of the strip-shaped holes 51, the specific arrangement of the permanent magnets 7 may be appropriately adjusted.

[0037] In this embodiment, the fixing plate 5 may be a circular plate made of a steel plate or other metal materials for embedding the permanent magnet 7 .

[0038] Preferably, a plurality of fan-shaped permanent magnet arrays are arranged in a circumferential array on the fixed plate 5, and each fan-shaped permanent magnet array is composed of a plurality of fan-shaped permanent magnets that increase in radial direction from the inside to the outside; the N poles and S poles of adjacent fan-shaped permanent magnets are arranged in opposite directions up and down to achieve different magnetic properties of adjacent fan-shaped permanent magnet poles (adjacent poles on each ring are different and adjacent poles of two rings are different). Figure 8 FIG. 8 shows the arrangement of the permanent magnet 7 of this embodiment. Figure 8As shown, the permanent magnets 7 are arranged in a circular distribution around the central axis 1, divided into three rings, and 8 pieces are arranged in each ring. On the same surface, the arrangement of the magnetic poles is that the magnetic properties of adjacent magnetic poles are different (the adjacent magnetic poles on each ring are different and the magnetic poles of two adjacent rings are different, such as the magnetic poles in one ring are NSNSNSNS (or SNSNSNSN). This staggered arrangement can effectively optimize the distribution state of the magnetic flux lines, so that when the magnetic flux lines are cut, the eddy current damping force generated will be significantly improved, the energy consumption of the eddy current unit will be increased, and the seismic performance of the structure will be improved.

[0039] When an earthquake occurs, the bridge pier and the main beam will move relative to each other in the plane, thereby driving the sliding rod 10 to move relative to the central axis 1 in the plane. The first connecting column 91 and the second connecting column 92 are subjected to thrust from the first sliding guide groove 101 and the second sliding guide groove 102 of the sliding rod 10 at the same time during the sliding process. This thrust is then transmitted to the first rack 81 and the second rack 82 connected to the first connecting column 91 and the second connecting column 92, driving them to slide in the first sliding groove 61 and the second sliding groove 62. Subsequently, the first gear 23 and the second gear 33 meshed with the first rack 81 and the second rack 82 are driven to rotate respectively. This series of orderly mechanical transmissions finally realizes the rotation of the upper metal plate gear assembly 3 and the lower metal plate gear assembly 2. In addition, the upper and lower metal plate gear assemblies rotate independently without affecting each other. When the upper and lower metal plate gear assemblies rotate, they cut the magnetic flux lines emitted by the permanent magnet 7, thereby generating an induced current, which further generates an eddy current damping force, thereby effectively hindering the rotation of the upper and lower metal plate gear assemblies. In this process, the external input energy is effectively consumed and dissipated in the form of heat energy.

[0040] When the spacing between the permanent magnets 7 on the fixed plate 5 decreases and the number of permanent magnets 7 increases accordingly, the energy consumption of the eddy current device also increases. In addition, if the gear size in the metal disc gear assembly is reduced, the number of revolutions of the metal disc gear assembly will increase when the rack slides with the same displacement, thereby increasing the efficiency of the metal disc gear assembly in performing magnetic flux line cutting motion, further improving energy consumption, and ultimately achieving the effect of reducing vibration.

[0041] When only one-way displacement occurs, front-to-back or left-to-right, only one rack moves and drives the corresponding metal plate gear assembly to rotate, while the other rack and metal plate gear assembly do not move. Fig. 9As shown, when the sliding rod 10 only moves forward as shown in the figure, the second connecting column 92 does not move, is not subjected to the thrust applied by the second sliding guide groove 102, and the second rack 82 does not slide; the first connecting column 91 does not move relative to the first sliding guide groove 101, and is only subjected to the forward thrust of the first sliding guide groove 101, driving the first rack 81 to move forward, thereby causing the lower metal plate gear assembly 2 to rotate clockwise. Fig.10 As shown, when the sliding rod 10 only moves to the left as shown in the figure, the first connecting column 91 does not move and is never subjected to the thrust applied by the first sliding guide groove 101, and the first rack 81 does not slide; the second connecting column 92 does not move relative to the second sliding guide groove 102, and is only subjected to the leftward thrust of the second sliding guide groove 102, driving the second rack 82 to move to the left, thereby causing the upper metal plate gear assembly 3 to rotate counterclockwise.

[0042] When bidirectional displacement occurs, the first connecting column 91 and the second connecting column 92 slide in the first sliding guide groove 101 and the second sliding guide groove 102 respectively, and are respectively thrusted by the first sliding guide groove 101 and the second sliding guide groove 102, and then drive the first rack 81 and the second rack 82 to move, thereby driving the upper and lower metal plate gear assemblies to rotate. Fig.11 As shown in the figure, when the displacement occurs forward and leftward as shown in the figure, the second sliding guide groove 102 slides forward, and the second connecting column 92 is pushed leftward by the second sliding guide groove 102; the first sliding guide groove 101 slides leftward, and the first connecting column 91 is pushed forward by the first sliding guide groove 101. At this time, the lower metal plate gear assembly rotates clockwise, and the upper metal plate gear assembly rotates counterclockwise. Similarly, when displacement occurs in other directions, it can be decomposed into combined displacement in the front, back, left, and right directions.

[0043] The present invention can not only limit structural displacement and multi-directional energy consumption, but also calculate the relationship between the damping force and the motion speed in a single direction through displacement decomposition to perform numerical analysis. In addition, it also has the advantages of non-contact damping, no friction loss, stable energy consumption effect, etc., and has great application value.

[0044] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. An eddy current type plane multi-directional bridge shock absorption and energy dissipation system, characterized in that: The invention comprises a central shaft, an upper metal plate gear assembly, a lower metal plate gear assembly, a fixed plate, a first rack, a second rack and a sliding rod. The fixed plate is fixedly connected to the middle of the central shaft. The upper metal plate gear assembly and the lower metal plate gear assembly are respectively arranged on the upper and lower sides of the fixed plate and are respectively rotatably connected to the central shaft. The second rack and the first rack are arranged perpendicular to each other and are respectively located between the fixed plate and the upper and lower metal plate gear assemblies. The second rack and the first rack are respectively slidably matched with the upper and lower side surfaces of the fixed plate, and the teeth thereon are respectively matched with the teeth on the upper and lower metal plate gear assemblies. The gears are meshed, and the sliding rod is arranged between the fixed plate and the upper metal disk gear assembly. The sliding rod has a transverse connecting part and a longitudinal connecting part, and the transverse connecting part and the longitudinal connecting part are respectively slidably matched with the second rack and the first rack; a permanent magnet is arranged on the fixed plate to cut the magnetic flux lines of the permanent magnet when the upper and lower metal disk gear assemblies rotate relative to the fixed plate to generate an induced current, thereby generating an eddy current damping force to slow down or hinder the continuous rotation of the upper and lower metal disk gear assemblies; the central axis is fixedly connected to the pier, and the sliding rod is fixedly connected to the main beam.

2. The eddy current type plane multi-directional bridge shock absorption and energy dissipation system according to claim 1, characterized in that: The lower metal plate gear assembly consists of a first metal plate, a first hollow short column and a first gear, the first gear is located on the upper side of the first metal plate, and the first metal plate and the first gear are respectively fixedly connected to the outer periphery of the first hollow short column, and the first hollow short column is rotatably connected to the lower section of the central shaft through the first bearing group, thereby realizing the rotation of the lower metal plate gear assembly relative to the rotating shaft and the fixed plate; the upper metal plate gear assembly consists of a second metal plate, a second hollow short column and a second gear, the second gear is located on the lower side of the second metal plate, and the second metal plate and the second gear are respectively fixedly connected to the outer periphery of the second hollow short column, and the second hollow short column is rotatably connected to the upper section of the central shaft through the second bearing group, thereby realizing the rotation of the upper metal plate gear assembly relative to the rotating shaft and the fixed plate.

3. The eddy current type plane multi-directional bridge shock absorption and energy dissipation system according to claim 2 is characterized in that: A through hole is provided in the middle of the first metal plate, and the central axis passes downward through the through hole in the middle of the first metal plate and is fixedly connected to the bridge pier.

4. The eddy current type plane multi-directional bridge shock absorption and energy dissipation system according to claim 1, characterized in that: The lower side surface and the upper side surface of the fixing plate are respectively provided with a first sliding groove group and a second sliding groove group, the first rack is slidably matched with the first sliding groove group, and the second rack is slidably matched with the second sliding groove group.

5. The eddy current type plane multi-directional bridge shock absorption and energy dissipation system according to claim 4, characterized in that: The first sliding groove group and the second sliding groove group respectively include two horizontally arranged sliding grooves, the setting direction of the two sliding grooves of the first sliding groove group is the same as the sliding direction of the first rack, and the setting direction of the two sliding grooves of the second sliding groove group is the same as the sliding direction of the second rack; the two sliding grooves on the same sliding groove group are respectively arranged at a set distance close to the edge of the fixed plate to increase the space for setting the permanent magnet on the fixed plate and the range of reciprocating motion of the rack; the first rack includes a first tooth portion in the middle and a first sliding rod portion located on the left and right sides of the first tooth portion, the first tooth portion is meshed with the first gear on the lower metal plate gear assembly, and the first sliding rod portions on the left and right sides are respectively slidably matched with the two sliding grooves of the first sliding groove group; the second rack includes a second tooth portion in the middle and a second sliding rod portion located on the left and right sides of the second tooth portion, the second tooth portion is meshed with the second gear on the upper metal plate gear assembly, and the second sliding rod portions on the left and right sides are respectively slidably matched with the two sliding grooves of the second sliding groove group.

6. The eddy current type plane multi-directional bridge vibration reduction and energy dissipation system according to claim 5, characterized in that: Stoppers are provided at both left and right ends of the first rack and the second rack, and the outer dimensions of the stoppers are larger than the inner hole dimensions of the sliding groove to prevent the racks from sliding due to excessive displacement.

7. The eddy current type plane multi-directional bridge vibration reduction and energy dissipation system according to claim 1, characterized in that: The sliding rod is composed of a main beam connecting part, a transverse connecting part and a longitudinal connecting part. The transverse connecting part and the longitudinal connecting part are perpendicular to each other and connected to the main beam connecting part as a whole. The main beam connecting part is fixedly connected to the main beam. The extension direction of the transverse connecting part is perpendicular to the sliding direction of the second rack, and the extension direction of the longitudinal connecting part is perpendicular to the sliding direction of the first rack.

8. The eddy current type plane multi-directional bridge vibration reduction and energy dissipation system according to claim 1, characterized in that: A first connecting column and a second connecting column are respectively provided on the first rack and the second rack; a second sliding guide groove is provided on the upper edge of the transverse connecting part perpendicular to the sliding direction of the second rack, and the second connecting column of the second rack is embedded in the second sliding guide groove to achieve sliding cooperation between the second rack and the transverse connecting part; a first sliding guide groove is provided on the upper edge of the longitudinal connecting part perpendicular to the sliding direction of the first rack, and the first connecting column of the first rack is embedded in the first sliding guide groove to achieve sliding cooperation between the first rack and the longitudinal connecting part; a strip hole is provided on the upper edge of the fixed plate within the sliding range of the first connecting column, and the first connecting column passes through the strip hole upward and is embedded in the first sliding guide groove.

9. The eddy current type plane multi-directional bridge vibration reduction and energy dissipation system according to claim 1, characterized in that: The permanent magnet array is embedded in the fixing plate.

10. The eddy current type plane multi-directional bridge vibration reduction and energy dissipation system according to claim 9, characterized in that: A plurality of fan-shaped permanent magnet arrays are arranged in a circumferential array on the fixed plate, each fan-shaped permanent magnet array is composed of a plurality of fan-shaped permanent magnets that increase in radial direction from inside to outside; the N poles and S poles of adjacent fan-shaped permanent magnets are arranged in opposite directions up and down to achieve different magnetic properties of adjacent fan-shaped permanent magnet poles.

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