An eddy current type plane multidirectional bridge damping energy dissipation system

Abstract

The present application relates to a kind of eddy current type plane multidirectional bridge damping energy dissipation system, including center shaft, upper metal disc gear assembly, lower metal disc gear assembly, fixed plate, first rack, second rack and sliding rod component, fixed plate is solidly connected with center shaft, upper and lower metal disc gear assembly is arranged on the upper and lower sides of fixed plate and is rotatably connected with center shaft, first and second rack are perpendicular to each other and are respectively slidably connected with the upper and lower sides of fixed plate, and respectively with the gear on the upper and lower metal disc gear assembly Mesh, sliding rod component has horizontal and longitudinal connection, and horizontal and longitudinal connection are respectively slidably connected with second and first rack;Permanent magnet is provided on fixed plate, to cut the magnetic induction line when metal disc gear assembly rotates and produce induced current, in turn produce eddy current damping force to slow down or hinder the sustained rotation of metal disc gear assembly.The system has multidirectional energy dissipation function, no friction and wear, no contact damping, and simple structure, low realization cost.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bridge damping, and particularly relates to an eddy current type plane multidirectional bridge damping and energy dissipation system. BACKGROUND

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

[0003] In the prior art, scholars have proposed various types of damping devices, among which the commonly used ones include rubber seismic isolation bearings, friction pendulum bearings, viscous dampers and friction dampers, etc. These devices mainly dissipate energy in a contact mode, but may suffer from a certain degree of wear in cyclic loading, thereby leading to a reduction in energy dissipation effect. In recent years, scholars have proposed a new type of eddy current damper, which exhibits more excellent stability compared with traditional damping devices. However, the current eddy current damper design is mainly for single-direction energy dissipation, and lacks the function of bidirectional energy dissipation. However, the occurrence of earthquakes is random and variable, which usually causes displacement of the structure in multiple directions. If effective energy dissipation in multiple directions is required, damping devices need to be installed in multiple directions, which undoubtedly increases the overall cost of the damping system. Therefore, it is necessary to develop an eddy current damping device with multidirectional energy dissipation effect to solve the problems existing in the prior art. SUMMARY

[0004] The application aims to provide an eddy current type plane multidirectional bridge damping and energy dissipation system, which has a multidirectional energy dissipation function, no friction wear, no contact damping, improves the energy dissipation efficiency and damping stability, and has a simple structure and low implementation cost.

[0005] In order to achieve the above object, the technical scheme adopted by the present application is: a kind of eddy current type plane multidirectional bridge shock absorption energy dissipation system, including center shaft, upper metal disc gear assembly, lower metal disc gear assembly, fixed plate, first rack, second rack and sliding rod piece, the fixed plate is fixedly connected with the middle part of center shaft, the upper metal disc gear assembly, lower metal disc gear assembly respectively set up in the upper and lower sides of fixed plate and respectively with center shaft rotationally connected, the second rack, first rack are vertically arranged, and respectively located between fixed plate and upper, lower metal disc gear assembly, the second rack, first rack are respectively slidably connected with the upper and lower sides of fixed plate, and the teeth on it are respectively engaged with the gear on upper, lower metal disc gear assembly, the sliding rod piece is arranged between fixed plate and upper metal disc gear assembly, the sliding rod piece has transverse connecting portion and longitudinal connecting portion, and transverse connecting portion, longitudinal connecting portion are respectively slidably connected with second rack, first rack;Permanent magnet is provided on the fixed plate, to cut the magnetic induction line of permanent magnet when upper, lower metal disc gear assembly rotates relative to fixed plate, and then generate induced current, and then generate eddy current damping force to slow down or hinder the continuous rotation of upper, lower metal disc gear assembly;The center shaft is fixedly connected with pier, and the sliding rod piece is fixedly connected with main beam.

[0006] Further, the lower metal disc 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 fixedly connected to the outer peripheral part of the first hollow short column, the first hollow short column is rotationally connected to the lower segment of the center shaft through a first bearing set, so as to realize the rotation of the lower metal disc gear assembly relative to the rotating shaft and the fixed plate, the upper metal disc 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 fixedly connected to the outer peripheral part of the second hollow short column, the second hollow short column is rotationally connected to the upper segment of the center shaft through a second bearing set, so as to realize the rotation of the upper metal disc gear assembly relative to the rotating shaft and the fixed plate.

[0007] Further, a through hole is formed in the middle part of the first metal plate, and the center shaft passes through the through hole in the middle part of the first metal plate downward and is fixedly connected with the pier.

[0008] Further, the lower side and the upper side of the fixed plate are respectively provided with a first sliding groove set and a second sliding groove set, the first rack is slidably connected with the first sliding groove set, and the second rack is slidably connected with the second sliding groove set.

[0009] Further, the first sliding groove group and the second sliding groove group each include two horizontally arranged sliding grooves, the two sliding grooves of the first sliding groove group are arranged in the same direction as the sliding direction of the first rack, and the two sliding grooves of the second sliding groove group are arranged in the same direction as the sliding direction of the second rack; the two sliding grooves on the same sliding groove group are arranged at positions close to the edges of the fixed plate at a certain distance, so as to increase the space for arranging the permanent magnets on the fixed plate and the range of reciprocating movement of the racks; the first rack includes a first tooth portion in the middle and first sliding rod portions on the left and right sides of the first tooth portion, the first tooth portion is engaged with the first gear on the lower metal disc gear assembly, and the first sliding rod portions on the left and right sides are respectively in sliding cooperation with the two sliding grooves of the first sliding groove group; the second rack includes a second tooth portion in the middle and second sliding rod portions on the left and right sides of the second tooth portion, the second tooth portion is engaged with the second gear on the upper metal disc gear assembly, and the second sliding rod portions on the left and right sides are respectively in sliding cooperation with the two sliding grooves of the second sliding groove group.

[0010] Further, the left and right ends of the first rack and the second rack are each provided with a stopper, the size of the stopper is greater than the size of the inner hole of the sliding groove, so as to prevent the rack from sliding off due to excessive displacement.

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

[0012] Further, the first rack and the second rack are each provided with a first connecting column and a second connecting column; a second sliding guide groove is formed on the transverse connecting portion in a direction perpendicular to the sliding direction of the second rack, the second connecting column of the second rack is embedded in the second sliding guide groove, so as to realize the sliding cooperation between the second rack and the transverse connecting portion; a first sliding guide groove is formed on the longitudinal connecting portion in a direction perpendicular to the sliding direction of the first rack, the first connecting column of the first rack is embedded in the first sliding guide groove, so as to realize the sliding cooperation between the first rack and the longitudinal connecting portion; a strip-shaped hole is formed on the fixed plate along the sliding range of the first connecting column, the first connecting column passes through the strip-shaped hole upwardly and is embedded in the first sliding guide groove.

[0013] Further, the array of permanent magnets is embedded on the fixed plate.

[0014] Further, the fixed plate is circumferentially provided with a plurality of fan-shaped permanent magnet arrays, each fan-shaped permanent magnet array is composed of a plurality of fan-shaped permanent magnets arranged in a radial direction from inside to outside in sequence; the N-pole and the S-pole of adjacent fan-shaped permanent magnets are arranged in opposite directions, so as to realize the magnetic polarity alternation between adjacent fan-shaped permanent magnets.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1. The present application realizes a bidirectional energy dissipation design. By assembling the upper and lower metal disc gear assemblies that can rotate independently, the energy causing single-direction displacement in the left-right and front-back directions 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 causing displacement in the left-right direction, and the lower metal disc gear assembly is used to dissipate the energy causing displacement in the front-back direction. When the structure undergoes bidirectional displacement, the upper and lower metal disc gear assemblies rotate independently and dissipate the energy in the corresponding direction, thereby effectively dissipating the energy causing bidirectional displacement. This design not only significantly improves the energy dissipation efficiency, but also effectively enhances the stability of the device when dealing with complex seismic action.

[0017] 2. The present application converts the translation of the structure into rotation through the gear. Firstly, it improves the cutting magnetic induction line speed. Secondly, it adopts the structure of the metal disc fully covering the permanent magnet, which ensures that the magnetic flux is maintained at the maximum value, thereby effectively increasing the damping force. In addition, the present application can flexibly set the arrangement mode of the permanent magnet to realize the regulation and control of the damping ratio. By appropriately amplifying the damping ratio, the eddy current damping force can be effectively increased, thereby improving the overall energy dissipation effect.

[0018] 3. The present application adopts the eddy current damping mechanism. Eddy current damping is a non-contact damping, and this non-contact design has no friction loss, thereby giving the device higher durability and running stability.

[0019] 4. According to the correlation principle between the damping force and the speed, by adjusting the gear size engaged with the rack, the gear rotates more and faster under the condition that the rack slides with the same displacement, thereby changing the rotation speed and number of turns of the upper and lower metal disc gear assemblies, and finally achieving the purpose of reducing the displacement of the structure by increasing the eddy current damping force.

[0020] 5. The energy dissipation structure realized by the present application generates eddy current damping effect during operation. The energy consumption in this process can be simulated in numerical analysis. By decomposing the horizontal bidirectional motion into two vertical components, the energy consumption effect in the two directions can be calculated and evaluated independently using precise numerical analysis methods. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a system structure schematic diagram of an embodiment of the present application (the second metal plate 31 is hidden);

[0022] Figure 2 is a system structure schematic diagram of an embodiment of the present application (another view);

[0023] Figure 3 is a top view of the lower metal disc gear assembly in an embodiment of the present application;

[0024] Figure 4 is a perspective view of the lower metal disc gear assembly in an embodiment of the present application;

[0025] Figure 5 is a bottom view of the upper metal disc gear assembly in an embodiment of the present application;

[0026] Figure 6 is a perspective view of the upper metal disc gear assembly in an embodiment of the present application;

[0027] Figure 7 is a schematic diagram of the cooperation between the sliding rod and the rack in an embodiment of the present application;

[0028] Figure 8 is a schematic diagram of the arrangement of the permanent magnet on the fixed plate in an embodiment of the present application;

[0029] Figure 9 is a schematic diagram of the lateral displacement of the sliding rod in an embodiment of the present application;

[0030] Figure 10 is a schematic diagram of the longitudinal displacement of the sliding rod in an embodiment of the present application;

[0031] Figure 11 is a schematic diagram of the bidirectional displacement of the sliding rod in an embodiment of the present application.

[0032] In the figure: 1, central shaft; 2, lower metal disc gear assembly; 21, first metal plate; 22, first hollow stub; 23, first gear; 3, upper metal disc gear assembly; 31, second metal plate; 32, second hollow stub; 33, second gear; 41, first bearing set; 42, second bearing set; 5, fixed plate; 51, strip-shaped hole; 61, first sliding groove set; 62, second sliding groove set; 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

[0033] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0034] It should be noted that the following detailed description is exemplary in nature and is intended to provide further description of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0035] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0036] As shown in Figures 1-11 The embodiment provides an eddy current type plane multi-directional bridge damping energy dissipation system, which comprises a central shaft 1, an upper metal disc gear assembly 3, a lower metal disc 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 part of the central shaft 1. The upper metal disc gear assembly 3 and the lower metal disc gear assembly 2 are arranged on the upper side and the lower side of the fixed plate 5 respectively and are rotationally connected to the central shaft 1. The second rack 82 and the first rack 81 are arranged perpendicularly to each other. The second rack 82 is located between the fixed plate 5 and the upper metal disc gear assembly 3, and the first rack 81 is located between the fixed plate 5 and the lower metal disc gear assembly 2. The second rack 82 and the first rack 81 are slidingly matched with the upper side and the lower side of the fixed plate 5 respectively. The teeth on the second rack 82 are engaged with the gears on the upper metal disc gear assembly 3, and the teeth on the first rack 81 are engaged with the gears on the lower metal disc gear assembly 2. The sliding rod 10 is arranged between the fixed plate 5 and the upper metal disc gear assembly 3. The sliding rod 10 has a transverse connecting part and a longitudinal connecting part, and the transverse connecting part and the longitudinal connecting part are slidingly matched with the second rack 82 and the first rack 81 respectively. A permanent magnet 7 is arranged on the fixed plate 5. When the upper metal disc gear assembly 3 and the lower metal disc gear assembly 2 rotate relative to the fixed plate 5, the permanent magnet 7 is cut by the magnetic induction lines to generate induced current, thereby generating eddy current damping force to slow down or hinder the continuous rotation of the upper metal disc gear assembly and the lower metal disc gear assembly. The central shaft 1 is fixedly connected to a bridge pier, and the sliding rod 10 is fixedly connected to a main beam.

[0037] As shown in Figure 3 , 4 The lower metal disc gear assembly 2 comprises 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. The first metal plate 21 and the first gear 23 are fixedly connected to the outer circumferential part of the first hollow short column 22 respectively. The first hollow short column 22 is rotationally connected to the lower segment of the central shaft 1 through a first bearing set 41, so as to realize the rotation of the lower metal disc gear assembly relative to the rotating shaft and the fixed plate. Figure 5 , 6As shown, the upper metal disc 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 peripheral part of the second hollow short column 32. The second hollow short column 32 is rotatably connected to the upper segment of the central shaft 1 through the second bearing set 42, so as to realize the rotation of the upper metal disc gear assembly relative to the rotating shaft and the fixed plate. The first gear 23 and the second gear 33 can be adjusted in size to change the rotation speed of the upper and lower metal disc gear assemblies, so as to realize the adjustment of the size of the eddy current damping force.

[0038] In the embodiment, the upper metal disc gear assembly 3 and the lower metal disc gear assembly 2 are copper disc gear assemblies, and the second metal plate 31 and the first metal plate 21 are made of copper, but are not limited thereto, and can also be other metal materials capable of generating eddy current.

[0039] The first metal plate 21 is provided with a through hole in the middle part, and the central shaft 1 passes through the through hole in the middle part of the first metal plate 21 and is fixedly connected to the pier. The second metal plate 31 can not be provided with a through hole, and the central shaft 1 does not need to penetrate the second metal plate 31 upwardly.

[0040] The lower side and the upper side of the fixed plate 5 are respectively provided with a first sliding groove set 61 and a second sliding groove set 62. The first rack 81 is in sliding cooperation with the first sliding groove set 61, and the second rack 82 is in sliding cooperation with the second sliding groove set 62.

[0041] As shown in FIG. 6, the first sliding groove set 61 and the second sliding groove set 62 are respectively provided with a first sliding groove 611 and a second sliding groove 621. The first rack 81 is in sliding cooperation with the first sliding groove 611, and the second rack 82 is in sliding cooperation with the second sliding groove 621. Figure 7As shown, the first sliding groove group 61 and the second sliding groove group 62 each include two horizontally arranged sliding grooves. The two sliding grooves of the first sliding groove group 61 are arranged in the same direction as the sliding direction of the first rack 81, and the two sliding grooves of the second sliding groove group 62 are arranged in the same direction as the sliding direction of the second rack 82. The two sliding grooves on the same sliding groove group are respectively arranged at a predetermined distance from the edge of the fixed plate to increase the space for the permanent magnet on the fixed plate and the range of reciprocating motion of the rack. The first rack 81 includes a first tooth in the middle and first sliding rods on the left and right sides of the first tooth. The first tooth faces and meshes with the first gear 23 on the lower metal disc gear assembly 2. The first sliding rods on the left and right sides are respectively slidably engaged with the two sliding grooves of the first sliding groove group 61. The second rack 82 includes a second tooth in the middle and second sliding rods on the left and right sides of the second tooth. The second tooth faces and meshes with the second gear 33 on the upper metal disc gear assembly 3. The second sliding rods on the left and right sides are respectively slidably engaged with the two sliding grooves of the second sliding groove group 62. Thus, when the first rack 81 and the second rack 82 slide, they drive the lower metal disc gear assembly 2 and the upper metal disc gear assembly 3 to rotate, respectively. In order to realize the movement of the racks in both directions, a length is reserved at both ends of the first rack 81 and the second rack 82. The reserved length of each length is d / 2, that is, the maximum displacement in one direction is d / 2. Furthermore, both ends of the first rack 81 and the second rack 82 are provided with stops, the outer dimensions of which are larger than the inner diameter of the sliding groove, to prevent the rack from slipping due to excessive displacement.

[0042] like Figure 7 As shown, the sliding member 10 consists 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 integrally connected to the main beam connecting part. 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. A first connecting post 91 is provided on the first rack 81, and a second connecting post 92 is provided on the second rack 82. A second sliding guide groove 102 is formed on the transverse connecting part along the sliding direction perpendicular to the second rack. The second connecting post 92 of the second rack 82 is embedded in the second sliding guide groove 102 to achieve a sliding fit between the second rack and the transverse connecting part. A first sliding guide groove 101 is formed on the longitudinal connecting part along the sliding direction perpendicular to the first rack. The first connecting post 91 of the first rack 81 is embedded in the first sliding guide groove 101 to achieve a sliding fit between the first rack and the longitudinal connecting part.

[0043] In order to enable the first connecting column 91 to pass through the fixed plate 5 and slide, a strip-shaped hole 51 is formed on the fixed plate 5 along the sliding range of the first connecting column, the first connecting column 91 passes through the strip-shaped hole 51 upward and is embedded into the first sliding guide groove 101, so that it can smoothly slide in the strip-shaped hole 51. The length of the strip-shaped hole 51 is d, and the maximum displacement of the one-way structure can be d / 2.

[0044] The first sliding guide groove 101 and the second sliding guide groove 102 can not be through, and a certain non-through thickness is reserved at the top, which can improve the rigidity of the sliding rod member 10.

[0045] The sliding rod member 10 can move in any direction in the plane, and the movement can be decomposed into front and back and left and right two directions. The sliding rod member 10 is similar to a "T" shape, and the first sliding guide groove 101 and the second sliding guide groove 102 are respectively formed in the vertical equal-length longitudinal connecting part and the transverse connecting part. 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, and 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. Thus, the horizontal bidirectional movement of the sliding rod member 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.

[0046] As shown in Figure 1 When moving in the front and back or left and right direction, the innermost side of the movement range of the sliding rod member 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 more preferred design scheme is that the first rack 81 and the second rack 82 respectively reserve a length at both ends, and each reserved length is d / 2, that is, the maximum distance of one-way sliding is d / 2. The strip-shaped hole 51 is the movement track of the first connecting column 91, and the length is d. The center of the strip-shaped hole 51 is preferably designed at the initial position of the first connecting column 91, so as to realize equal displacement ability in the forward and reverse two directions. The length of the two equal-length vertical side grooves of the sliding rod member 10 is d. The initial position of the first connecting column 91 is located at the center position of the horizontal distance along the first rack 81 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. The initial position of the second connecting column 92 is located at the center position of the horizontal distance along the second rack 82 between the right outer edge of the second hollow short column 32 and the inner edge of the right sliding groove of the second sliding groove group 62. The center initial positions of the first sliding guide groove 101 and the second sliding guide groove 102 of the sliding rod member 10 are respectively at the top center of the first connecting column 91 and the second connecting column 92. When the structure generates displacement, the first connecting column 91 and the second connecting column 92 can slide and adjust correspondingly in the first sliding guide groove 101 and the second sliding guide groove 102 respectively according to the movement state of the structure.

[0047] Multiple permanent magnets 7 can be mounted on the fixing plate 5, and these permanent magnets 7 are arrayed and embedded on the fixing plate 5. The cross-sectional shape of a single permanent magnet 7 can be arc-shaped, rectangular, circular, etc., and the permanent magnets 7 can be arranged in a circular, rectangular, or other array manner, and can be arranged in a single ring or multiple rings. To facilitate the arrangement of the strip holes 51, the specific arrangement of the permanent magnets 7 can be appropriately adjusted.

[0048] In this embodiment, the fixing plate 5 can be a circular plate made of steel plate or other metal material to embed the permanent magnet 7.

[0049] Preferably, the fixed plate 5 is arranged with multiple sector-shaped permanent magnet arrays along the circumferential direction. Each sector-shaped permanent magnet array is composed of multiple sector-shaped permanent magnets that increase in size from the inside to the outside in the radial direction. The N poles and S poles of adjacent sector-shaped permanent magnets are arranged in opposite directions to achieve magnetic differences between adjacent sector-shaped permanent magnets (adjacent magnetic poles on each ring are different and magnetic poles between two adjacent rings are different). Figure 8 The arrangement of the permanent magnets 7 in this embodiment is shown. For example... Figure 8 As shown, the permanent magnets 7 are arranged in a circular pattern around the central axis 1, in three rings, with eight magnets in each ring. On the same plane, the magnetic poles are arranged such that adjacent magnetic poles are opposite in magnetism (adjacent magnetic poles on each ring are different, and magnetic poles between adjacent rings are different, such as the magnetic poles in one ring being NSNSNSNS (or SNSNSNSN). This staggered arrangement can effectively optimize the distribution of magnetic field lines, thereby significantly increasing the eddy current damping force generated when cutting magnetic field lines, increasing the energy consumption of the eddy current unit, and improving the seismic performance of the structure.

[0050] During an earthquake, the bridge piers and main beams undergo relative motion within a plane, causing the sliding rod 10 to move relative to the central axis 1 within the plane. As the first connecting column 91 and the second connecting column 92 slide within the first sliding guide groove 101 and the second sliding guide groove 102 of the sliding rod 10, they are simultaneously subjected to thrust from these two sliding guide grooves. 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 within the first sliding groove 61 and the second sliding groove 62. Subsequently, this drives the first gear 23 and the second gear 33, which mesh with the first rack 81 and the second rack 82, to rotate, respectively. This series of orderly mechanical transmissions ultimately achieves the rotation of the upper metal disc gear assembly 3 and the lower metal disc gear assembly 2. Furthermore, the upper and lower metal disc gear assemblies rotate independently, without affecting each other. When the upper and lower metal disc gear assemblies rotate, they cut the magnetic field lines emitted by the permanent magnet 7, thereby generating an induced current. This induced current further generates eddy current damping force, which effectively hinders the rotation of the upper and lower metal disc gear assemblies. In this process, the externally input energy is effectively consumed and dissipated in the form of heat.

[0051] When the distance between the permanent magnets 7 on the fixed plate 5 is reduced and the number of permanent magnets 7 is increased, the energy consumption of the eddy current device is also increased. In addition, if the size of the gear in the metal disc gear assembly is reduced, the number of rotations of the metal disc gear assembly will increase when the rack slides the same displacement, thereby increasing the efficiency of the magnetic induction line cutting motion of the metal disc gear assembly, further improving the energy consumption, and ultimately reducing the vibration.

[0052] When only forward or leftward unidirectional displacement occurs, only one rack moves and drives the corresponding metal disc gear assembly to rotate, and the other rack and metal disc gear assembly do not move. As shown in Figure 9 When the sliding rod 10 only occurs forward displacement as shown in the figure, the second connecting column 92 does not move and is not subjected to the forward thrust of 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, thereby driving the first rack 81 to move forward and causing the lower metal disc gear assembly 2 to rotate clockwise. As shown in Figure 10 When the sliding rod 10 only occurs leftward displacement as shown in the figure, the first connecting column 91 does not move and is not subjected to the leftward thrust of 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, thereby driving the second rack 82 to move leftward and causing the upper metal disc gear assembly 3 to rotate counterclockwise.

[0053] 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 subjected to the thrust of the first sliding guide groove 101 and the second sliding guide groove 102, respectively, and then drive the first rack 81 and the second rack 82 to move, thereby driving the upper and lower metal disc gear assemblies to rotate. As shown in Figure 11 When forward and leftward displacement occurs as shown in the figure, the second sliding guide groove 102 slides forward, and the second connecting column 92 is subjected to the leftward thrust of the second sliding guide groove 102; the first sliding guide groove 101 slides leftward, and the first connecting column 91 is subjected to the forward thrust of the first sliding guide groove 101. At this time, the lower metal disc gear assembly rotates clockwise, and the upper metal disc gear assembly rotates counterclockwise. Similarly, when other direction displacement occurs, it can be decomposed into forward and leftward direction combined displacement.

[0054] The present application not only can limit structural displacement and multi-directional energy consumption, but also can calculate the relationship between the damping force and the motion speed in a single direction through displacement decomposition for numerical analysis. In addition, it has the advantages of non-contact damping, no friction loss, stable energy consumption effect, etc., and has great application value.

[0055] The above descriptions are only the preferred embodiments of the present application, not intended to limit the present application in other forms. Any person skilled in the art can make changes or modifications to the equivalent embodiments with the disclosed technical contents. However, any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution of the present application and according to the technical essence of the present application still belong to the protection scope of the present application.

Claims

1. An eddy current type planar multi-directional bridge shock absorbing and energy consuming system, characterized in that, The utility model relates to a kind of damping device of bridge pier, including central axis, upper metal disc gear assembly, lower metal disc gear assembly, fixed plate, first rack, second rack and sliding rod piece, the fixed plate is fixedly connected with central axis middle part, the upper metal disc gear assembly, lower metal disc gear assembly are respectively arranged in the upper and lower two sides of fixed plate and are respectively rotationally connected with central axis, the second rack, first rack are perpendicularly arranged, and are respectively located between fixed plate and upper, lower metal disc gear assembly, the second rack, first rack are respectively slidably connected with the upper and lower sides of fixed plate, and the tooth on it is respectively engaged with the gear on upper, lower metal disc gear assembly, the sliding rod piece is arranged between fixed plate and upper metal disc gear assembly, the sliding rod piece has transverse connecting portion and longitudinal connecting portion, and transverse connecting portion, longitudinal connecting portion are respectively slidably connected with second rack, first rack;Permanent magnet is provided on the fixed plate, to cut the magnetic induction line of permanent magnet when upper, lower metal disc gear assembly relative to fixed plate rotates and generate induced current, to generate eddy current damping force to slow down or hinder the sustained rotation of upper, lower metal disc gear assembly;The central axis is fixedly connected with bridge pier, and the sliding rod piece is fixedly connected with main beam; The sliding rod piece is composed of main beam connecting portion, transverse connecting portion and longitudinal connecting portion, the transverse connecting portion and longitudinal connecting portion are perpendicular to each other and are connected as a whole with main beam connecting portion, the main beam connecting portion is fixedly connected with main beam, the extension direction of the transverse connecting portion is perpendicular to the sliding direction of the second rack, and the extension direction of the longitudinal connecting portion is perpendicular to the sliding direction of the first rack; First connecting column and second connecting column are respectively provided on the first rack and the second rack, a second sliding guide groove is formed on the transverse connecting portion along the direction perpendicular to the sliding direction of the second rack, the second connecting column of the second rack is embedded in the second sliding guide groove to realize the sliding fit between the second rack and the transverse connecting portion, a first sliding guide groove is formed on the longitudinal connecting portion along the direction 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 realize the sliding fit between the first rack and the longitudinal connecting portion, and a strip-shaped hole is formed on the fixed plate along the sliding range of the first connecting column, the first connecting column passes through the strip-shaped hole upwardly and is embedded in the first sliding guide groove.

2. The eddy current type planar multi-directional bridge shock absorbing and energy consuming system according to claim 1, characterized in that, The lower metal disc 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 fixedly connected to the outer peripheral portion of the first hollow short column, the first hollow short column is rotationally connected to the lower segment of the central axis through a first bearing set, thereby realizing the rotation of the lower metal disc gear assembly relative to the rotating shaft and the fixed plate, the upper metal disc 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 fixedly connected to the outer peripheral portion of the second hollow short column, the second hollow short column is rotationally connected to the upper segment of the central axis through a second bearing set, thereby realizing the rotation of the upper metal disc gear assembly relative to the rotating shaft and the fixed plate.

3. The eddy current planar multi-directional bridge shock energy dissipation system of claim 2, wherein, The first metal plate has a through hole in the middle part, and the central shaft passes through the through hole in the middle part of the first metal plate downward and is fixedly connected with the pier.

4. The eddy current type planar multi-directional bridge shock absorbing and energy consuming system according to claim 1, characterized in that, The lower side and the upper side of the fixed plate are respectively provided with a first sliding groove group and a second sliding groove group, the first rack is in sliding fit with the first sliding groove group, and the second rack is in sliding fit with the second sliding groove group.

5. The eddy current planar multi-directional bridge damping and energy dissipation system according to claim 4, wherein, The first sliding groove group and the second sliding groove group respectively include two horizontally arranged sliding grooves, the setting directions of the two sliding grooves of the first sliding groove group are the same as the sliding direction of the first rack, the setting directions of the two sliding grooves of the second sliding groove group are the same as the sliding direction of the second rack, the two sliding grooves on the same sliding groove group are respectively arranged at positions close to the edges of the fixed plate and at a set distance, so as to increase the space for arranging the permanent magnets on the fixed plate and the reciprocating range of the racks, the first rack includes a first tooth portion in the middle and first slide rod portions on the left and right sides of the first tooth portion, the first tooth portion is in mesh with the first gear on the lower metal disc gear assembly, and the first slide rod portions on the left and right sides are respectively in sliding fit with the two sliding grooves of the first sliding groove group, the second rack includes a second tooth portion in the middle and second slide rod portions on the left and right sides of the second tooth portion, the second tooth portion is in mesh with the second gear on the upper metal disc gear assembly, and the second slide rod portions on the left and right sides are respectively in sliding fit with the two sliding grooves of the second sliding groove group.

6. The eddy current planar multi-directional bridge shock energy dissipation system of claim 5, wherein, The left and right ends of the first rack and the second rack are respectively provided with a stopper, the outer dimension of the stopper is greater than the inner hole dimension of the sliding groove, so as to prevent the rack from sliding off due to too large displacement.

7. The eddy current planar multi-directional bridge damping and energy dissipation system according to claim 1, wherein, The permanent magnet array is embedded on the fixed plate.

8. The eddy current planar multi-directional bridge shock energy dissipation system of claim 7, wherein, The fixed plate is circumferentially provided with a plurality of fan-shaped permanent magnet arrays, each fan-shaped permanent magnet array is composed of a plurality of fan-shaped permanent magnets which are sequentially increased in size from the inside to the outside along the radial direction, and the N-pole and the S-pole of adjacent fan-shaped permanent magnets are oppositely arranged in the up and down directions, so as to realize the magnetic polarity alternation of adjacent fan-shaped permanent magnets.

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