An eddy current mass system and a new tuned inertial eddy current damper

Abstract

The present invention discloses an eddy current mass system and a novel tuned inertial eddy current damper, relating to the field of dampers. The eddy current mass system for a damper comprises a damping mass block having a first mounting space formed thereon, wherein a rotating gear is disposed within the first mounting space; and an eddy current damping system comprising a magnetic flux generator, a magnetic flux cutting mechanism, and a supporting rotating shaft. The magnetic flux generator has a second mounting space for forming magnetic flux lines, the magnetic flux cutting mechanism is located in the second mounting space, the supporting rotating shaft passes through the magnetic flux generator and is fixed to the magnetic flux cutting mechanism, and the supporting rotating shaft is coaxially connected to the rotating shaft of the rotating gear. The present invention solves the problem in the prior art of difficulty in providing sufficient damping force to effectively control large vibrations under low-frequency vibrations and small damping coefficients.

Description

Technical Field

[0001] The present invention relates to the field of dampers, and in particular to an eddy current mass system and a novel tuned inertial eddy current damper. Background Art

[0002] Tuned mass dampers (TMDs) are widely used in engineering to control vibrations in bridges, high-rise buildings, and mechanical equipment. Compared to other types of dampers, TMDs achieve efficient vibration reduction by tuning their own frequency to closely match the structural frequency, converting structural vibrations into motion through mass units. These units dissipate energy through the damping units.

[0003] However, as the controlled frequency decreases, the limitations of traditional tuned dampers begin to become apparent. Low-frequency vibrations (such as those caused by wind loads or earthquakes, with frequencies below 1 Hz) are particularly significant on large structures. In such cases, the large mass and space required for traditional tuned dampers make their effective application in practical engineering projects difficult. For example, for long-span bridges with frequencies below 0.1 Hz, the springs of traditional tuned mass dampers (TMDs) are often too long to be installed in structures with limited internal space.

[0004] To address this challenge, ultra-low-frequency inertial dampers (ULFDs) have emerged. These dampers combine the advantages of inertial mass with a rotating gear mounted on the damping mass and a guide rod with a guide rack installed within the damper's support. The coordinated structure of the rotating gear and guide rack limits the movement of the damping mass, thereby amplifying the equivalent vibration mass of the tuned mass damper. This addresses the problem of excessive net spring elongation in ULF vertical TMDs, significantly reducing static spring elongation and usage. This resolves the contradiction between the low spring stiffness of the ULF TMD and the excessive elongation of the balancing damping mass under gravity. This overcomes the technical bottleneck of vertical ultra-low-frequency tuned damping vibration reduction for long-span bridge main beams and meets the vertical installation space requirements of long-span bridges.

[0005] Although the current inertial damper has solved the problem of low-frequency vibration control to a certain extent, the damping coefficient provided by the spring expansion and contraction and the pressure of the damping mass block is still relatively small, making it difficult to provide sufficient damping force to effectively control large vibrations. Summary of the Invention

[0006] The present application provides an eddy current mass system and a novel tuned inertial eddy current damper, which can solve the technical problem in the prior art that it is difficult to provide sufficient damping force to effectively control large-scale vibrations under low-frequency vibrations and small damping coefficients.

[0007] In a first aspect, an embodiment of the present application provides an eddy current mass system for a damper, comprising:

[0008] a damping mass block, wherein a first installation space is defined on the damping mass block, and a rotating gear is disposed in the first installation space;

[0009] An eddy current damping system, the eddy current damping system includes a magnetic flux generator, a magnetic flux cutting mechanism and a supporting rotating shaft, the magnetic flux generator has a second installation space for forming magnetic flux, the magnetic flux cutting mechanism is located in the second installation space, the supporting rotating shaft passes through the magnetic flux generator and is fixed to the magnetic flux cutting mechanism, and the supporting rotating shaft is coaxially connected to the rotating shaft of the rotating gear.

[0010] In combination with the first aspect, in one embodiment, the magnetic flux generator includes an eddy current disk and a fixed magnet, the eddy current disk has the second installation space, fixed magnets are provided on both inner side walls of the eddy current disk, and the magnetic flux cutting mechanism is located between the two fixed magnets.

[0011] In combination with the first aspect, in one embodiment, the fixed magnet is a permanent magnet or an electromagnet.

[0012] In combination with the first aspect, in one embodiment, the magnetic flux line cutting mechanism includes a conductor mounting rod and two conductor disks mounted on both sides of the conductor mounting rod;

[0013] Alternatively, the magnetic flux line cutting mechanism includes a conductor mounting rod made of a conductor material.

[0014] In combination with the first aspect, in one embodiment, the rotating shaft of the rotating gear is formed by a portion of the supporting rotating shaft, so that the rotating gear and the magnetic flux line cutting mechanism share the same rotating shaft.

[0015] In a second aspect, an embodiment of the present application provides a novel tuned inertial eddy current damper, comprising:

[0016] The eddy current mass system for the damper;

[0017] and a guide support rod, wherein the guide support rod is arranged in the first space and a guide rack meshing with the rotating gear is provided on the guide support rod.

[0018] In conjunction with the second aspect, in one embodiment, a novel tuned inertial eddy current damper further includes:

[0019] The inertial mass device includes an inertial mass disk and a plurality of counterweight blocks. The plurality of counterweight blocks are detachably arranged on the inertial mass disk. The inertial mass disk is arranged on the supporting rotating shaft.

[0020] In conjunction with the second aspect, in one embodiment, a novel tuned inertial eddy current damper further includes:

[0021] A supporting device comprises a supporting base, a supporting top plate and a plurality of supporting legs, wherein the supporting top plate and the supporting base are connected via the supporting legs.

[0022] The eddy current mass system and the guide support rod for the damper are both arranged in the support device.

[0023] In conjunction with the second aspect, in one embodiment, the supporting device further includes:

[0024] The support reinforcement assembly includes a plurality of transverse reinforcing rods and a plurality of longitudinal reinforcing rods. The transverse reinforcing rods are arranged between the two support legs on the same plane in the length direction of the support device, and the longitudinal reinforcing rods are arranged between the two support legs on the same plane in the width direction of the support device.

[0025] In conjunction with the second aspect, in one embodiment, a novel tuned inertial eddy current damper further includes:

[0026] The tuning system includes a plurality of elastic expansion members connected to the damping mass block and used to transmit vibration to the damping mass block and drive the damping mass block to perform relative displacement with the vibration.

[0027] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0028] By adding an eddy current damping system, when the damping mass block moves up and down due to the influence of vibration, the supporting rotating shaft drives the magnetic flux line cutting mechanism to rotate in the second installation space, and cuts the magnetic flux lines formed by the magnetic flux line generator in the second installation space to form additional Lorentz force, thereby increasing the additional Lorentz force under the influence of the mass of the damping mass block itself, thereby increasing the damping force provided by the damping mass block when it moves, solving the problem in the prior art that it is difficult to provide sufficient damping force to effectively control large vibrations under low-frequency vibrations and small damping coefficients. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 This is a schematic diagram of the overall structure of a novel tuned inertial eddy current damper in this application;

[0031] Figure 2 Schematic cross-section of a novel tuned inertial eddy current damper in this application;

[0032] Figure 3 for Figure 2 A partial enlarged view of part A in a new type of tuned inertial eddy current damper;

[0033] In the figure: 1. Support base; 11. Support top plate; 12. Support leg; 121. Reinforced support base; 13. Transverse reinforced rod; 14. Longitudinal reinforced rod; 2. Damping mass block; 21. Inertial mass disk; 211. Counterweight block; 3. Elastic telescopic member; 31. Tuning partition; 311. Connecting hole; 4. Guide support rod; 41. Guide rack; 42. Rotating gear; 43. Guide pulley; 5. Eddy current disk; 51. Support rotating shaft; 511. Rotating shaft support frame; 52. Conductor mounting rod; 521. Conductor disk; 53. Second installation space; 54. Fixed magnet; 55. Eddy current disk support frame. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] The embodiments of the present application provide an eddy current mass system and a novel tuned inertial eddy current damper, which can solve the problem in the prior art that the damping coefficient is small and it is difficult to provide sufficient damping force to effectively control large vibrations.

[0036] Reference Figure 11. The present application discloses an eddy current mass system and a new tuned inertial eddy current damper. The embodiment of the present application is described in terms of a state in which an eddy current mass system has been installed in an eddy current damper, including a support device, a guide support rod 4, a damping mass block 2, a tuning system and an eddy current damping system. The support device includes a support base 1, a support top plate 11 and a plurality of support legs 12. The support base 1 is installed on the tooling to be damped, and the support base 1 and the support top plate 11 are connected by support legs 12; the two ends of the guide support rod 4 in the length direction are respectively connected to the support base 1 and the support top plate 11, and the length direction of the guide support rod 4 is parallel to the length direction of the support legs 12, and a guide rack 41 is installed on the surface of the guide support rod 4; the damping mass A first installation space is provided on the gauge block 2, and a rotating gear 42 is provided in the first installation space. The rotating gear 42 is meshed with the guide rack 41 so that the damping mass block 2 can move along the length direction of the guide rack 41 when affected by vibration; the tuning system includes a plurality of elastic telescopic parts 3, which are connected to the damping mass block 2 and are used to transmit vibration to the damping mass block 2 and drive the damping mass block 2 to make relative displacement with the vibration; the eddy current damping system includes a magnetic flux generator, a magnetic flux cutting mechanism and a supporting rotating shaft 51. The magnetic flux generator has a second installation space 53 for forming magnetic flux. The magnetic flux cutting mechanism is located in the second installation space 53. The supporting rotating shaft 51 is passed through the magnetic flux generator and fixed to the magnetic flux cutting mechanism, and the supporting rotating shaft 51 is coaxially connected to the rotating shaft of the rotating gear 42.

[0037] When the damping mass 2 is affected by vibration, the tuning device transmits the vibration to the damping mass 2, causing the rotating gear 42 to rotate, driving the damping mass 2 to move on the guide rack 41. The rotating gear 42 also rotates the supporting rotating shaft 51 coaxially connected to the rotating gear 42, thereby driving the magnetic flux cutting mechanism to rotate within the second installation space 53 and cut the magnetic flux lines formed by the magnetic flux generator within the second installation space 53. This additional Lorentz force, combined with the weight of the damping mass 2, increases the damping force, solving the problem of the existing technology that it is difficult to provide sufficient damping force under low-frequency vibrations and small damping coefficients, and effectively controlling large-amplitude vibrations. By adding an eddy current damping system, more precise control of low-frequency vibrations is achieved, significantly improving the damping effect of the damper, and reducing the limitations of the damper in dealing with large-amplitude vibrations compared to traditional technologies.

[0038] Furthermore, the magnetic flux generator includes an eddy current disk 5 and a fixed magnet 54, referring to Figure 2 A cross-sectional diagram of a novel tuned inertial eddy current damper in this application and Figure 3A partial enlargement of section A in the center shows a first mounting space defined in the center of the damping mass 2. The eddy current disk 5 is secured to the damping mass 2 via an eddy current disk support frame 55, enabling the eddy current disk 5 to move with the movement of the damping mass 2. A second mounting space 53 is defined within the eddy current disk 5. Fixed magnets 54 are positioned on opposite sidewalls of the second mounting space 53, creating magnetic flux lines between the two fixed magnets. A supporting rotating shaft 51 extends from the center of the damping mass 2 through both the damping mass 2 and the eddy current disk 5, with its length parallel to that of the damping mass 2. The rotating shaft of the rotating gear 42 is formed by a part of the supporting rotating shaft 51, and the supporting rotating shaft 51 is connected to the eddy current disk 5 and the damping mass block 2 through a rotating shaft support frame 511. The rotating shaft support frame 511 is specifically configured as a rolling bearing, so that when the supporting rotating shaft 51 rotates with the rotating gear 42, it only drives the damping mass block 2 and the eddy current disk 5 to slide on the guide rack 41, and the damping mass block 2 and the eddy current disk 5 will not rotate with the supporting rotating shaft 51; the magnetic flux cutting mechanism is located between the two fixed magnets 54, and the magnetic flux cutting mechanism includes a conductor mounting rod 52 and two conductor disks 521 installed on the two side walls of the conductor mounting rod 52. The conductor mounting rod 52 is fixed on the supporting rotating shaft 51. When the supporting rotating shaft 51 rotates with the rotating gear 42, it can drive the mounting rod to rotate between the two fixed magnetic patches to cut the magnetic flux between the two fixed magnets 54 in the second mounting space 53.

[0039] More specifically, the damping mass 2 is constructed from multiple mass units assembled with connecting bolts, making installation simple and allowing operators to easily adjust the weight of the damping mass 2. To further guide the movement of the damping mass 2, multiple guide pulleys 43 are mounted on its surface. These guide pulleys 43 abut against the support legs 12 and the guide support rods 4, further facilitating the sliding of the damping mass 2.

[0040] The fixed magnet 54 is specifically selected from permanent magnets or electromagnets. In actual use, the magnetic field strength within the second mounting space 53 of the eddy current disk 5 can be adjusted by adjusting the number of fixed magnets 54 according to the actual damping force required. The more fixed magnets 54 there are, the stronger the magnetic field strength is, the stronger the Lorentz force generated when cutting the magnetic flux lines is, and the greater the damping force is. Alternatively, the damping force can be adjusted by changing the material of the conductor disk 521. When the required damping force is small, an aluminum disk support conductor disk 521 with a lower magnetic flux can be used; when the damping requirement is large, a copper disk with a higher magnetic flux can be used. In other embodiments of the present application, the conductor mounting rod 52 can also be directly made of conductors with different magnetic fluxes, such as aluminum or copper, according to the actual damping force required, without the need for an additional conductor disk.

[0041] The eddy current disc support frame 55 is secured to the first mounting space of the damping mass 2 via mounting bolts, demonstrating its simple structure and ease of installation. The top of the eddy current disc 5 extends from the top surface of the damping mass 2. A cover is provided on the protruding portion of the top of the eddy current disc 5, allowing the operator to open the cover and adjust the fixed magnet 54 in the second mounting space 53. Reinforcement bolts are also installed on the rotating shaft of the rotating gear 42 to further secure the connection between the rotating gear 42 and the supporting rotating shaft 51.

[0042] Reference Figure 1 Schematic diagram of the overall structure of a new type of tuned inertial eddy current damper and Figure 2 A cross-sectional schematic diagram of a novel tuned inertial eddy current damper, wherein the tuning system further comprises a tuning baffle 31, the tuning baffle 31 being located between the damping mass block 2 and the support base 1, a plurality of connection holes 311 being provided on the tuning baffle, and an elastic telescopic member 3 being installed on each connection hole 311, the two ends of the elastic telescopic member 3 being connected to the tuning baffle 31 and the bottom of the damping mass block 2 in the length direction respectively, and the tuning baffle being able to make the elastic telescopic member 3 more stable when deformed. In order to further make the elastic telescopic member 3 drive the displacement of the damping mass block 2 more stable, a tuning baffle 31 can also be additionally provided between the support top plate 11 and the damping mass block 2, the elastic telescopic member 3 located below the damping mass block 2 is specifically selected as a telescopic spring, and the elastic telescopic member 3 located above the damping mass block 2 is specifically selected as a tension spring, and the specific selection can be made according to the actual needs on site. The number of telescopic springs and tension springs can be adjusted according to the different damping forces required for different operating environments. When the required damper frequency is large, the number of elastic telescopic parts 3 can be increased to improve the rigidity strength between the elastic telescopic parts 3 and the damping mass block 2, the support top plate 11 and the support base 1, thereby increasing the damping force; when the required damper frequency is small, the number of elastic telescopic parts 3 can be reduced to reduce the rigidity strength between the elastic telescopic parts 3 and the damping mass block 2, the support top plate 11 and the support base 1, thereby reducing the damping force.

[0043] In order to further enhance the damping force of the damping mass block 2 when it moves, an inertial mass device is also installed on the damping mass block 2. The inertial mass device includes an inertial mass disk 21 and a plurality of counterweight blocks 211. Figure 1The supporting rotating shaft 51 extends from both ends of the damping mass block 2. Specifically, two inertial mass disks 21 are provided. The inertial mass disks 21 are bolted to the extending portion of the supporting rotating shaft 51. Multiple counterweights 211 are mounted on the inertial mass disks 21 via mounting bolts. The inertial mass disks 21 are capable of rotating with the rotation of the supporting rotating shaft 51. When the inertial mass disks 21 rotate, they provide additional inertial mass for the damping mass block 2. The number of counterweights 211 can be selected based on the required damping force. When the required damping force is large, the number of counterweights 211 installed is increased to increase the inertial mass, thereby increasing the damping force. When the required damping force is small, the number of counterweights 211 installed is reduced.

[0044] In order to improve the overall strength of the support device, a support reinforcement assembly is also provided on the support device. The support reinforcement assembly includes a plurality of transverse reinforcing rods 13 and a plurality of longitudinal reinforcing rods 14. The transverse reinforcing rods 13 are arranged between two support legs 12 on the same plane in the longitudinal direction of the support device, and the longitudinal reinforcing rods 14 are arranged between two support legs 12 on the same plane in the width direction of the support device. The plurality of transverse reinforcing rods 13 and the plurality of longitudinal reinforcing rods 14 are specifically made of metal materials with high strength, such as steel. Steel not only has extremely high tensile and compressive strength, and can maintain the integrity of the transverse reinforcing rods 13 and the longitudinal reinforcing rods 14 under extreme conditions, but also has good plasticity and toughness, and can absorb and disperse large amounts of energy, thereby effectively resisting impact and vibration, so as to further improve the overall strength of the support device and extend its service life. In addition, steel has excellent weldability and processability, which facilitates precise cutting and connection according to actual needs to meet the installation requirements of the transverse reinforcing rods 13 and the longitudinal reinforcing rods 14. In other embodiments of the present application, aluminum alloy, titanium alloy, or other materials may be used to form the transverse and longitudinal reinforcing rods 13 and 14. Although aluminum alloy is slightly inferior to steel in strength, it has a low density and is lightweight, making it very advantageous for applications requiring overall weight reduction. Titanium alloy, on the other hand, is known for its high strength, low density, and excellent corrosion resistance, making it suitable for use in extremely harsh environments. The specific material selection can be flexibly adjusted based on the actual application scenario.

[0045] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0046] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0047] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A new type of tuned inertial eddy current damper, characterized in that: It includes: An eddy current mass system comprises a damping mass block (2) and an eddy current damping system, wherein a first installation space is provided on the damping mass block (2), and a rotating gear (42) is provided in the first installation space; and an eddy current damping system, wherein the eddy current damping system comprises a magnetic flux generator, a magnetic flux cutting mechanism and a supporting rotating shaft (51), wherein the magnetic flux generator has a second installation space (53) for forming magnetic flux, the magnetic flux cutting mechanism is located in the second installation space (53), the supporting rotating shaft (51) is passed through the magnetic flux generator and fixed to the magnetic flux cutting mechanism, the supporting rotating shaft (51) is coaxially connected to the rotating shaft of the rotating gear (42), and the rotating gear (42) drives the supporting rotating shaft coaxially connected to the rotating gear (42) while rotating. The shaft (51) rotates to drive the magnetic flux cutting mechanism to rotate in the second installation space (53) and cut the magnetic flux lines formed by the magnetic flux generator in the second installation space (53); the magnetic flux generator comprises an eddy current disk (5), an eddy current disk support frame (55) and a fixed magnet (54); the fixed magnets (54) are provided on both inner side walls of the eddy current disk (5); the magnetic flux cutting mechanism is located between the two fixed magnets (54); the eddy current disk support frame (55) is fixed in the first installation space of the damping mass block (2) by means of mounting bolts; the eddy current disk (5) is fixed to the damping mass block (2) by means of the eddy current disk support frame (55), so that the eddy current disk (5) can move along with the movement of the damping mass block (2); An inertial mass device is also mounted on the damping mass block (2), the inertial mass device comprising an inertial mass disk (21) and a plurality of counterweight blocks (211), the plurality of counterweight blocks (211) being detachably mounted on the inertial mass disk (21), the inertial mass disk (21) being mounted on a protruding section of the supporting rotating shaft (51) by means of bolts, and the inertial mass disk (21) being capable of rotating as the supporting rotating shaft (51) rotates; A support device, comprising a support base (1), a support top plate (11), and a plurality of support legs (12), wherein the support top plate (11) and the support base (1) are connected via the support legs (12); And, a guide support rod (4), the guide support rod (4) is arranged in the first installation space, the guide support rod (4) is provided with a guide rack (41) meshing with the rotating gear (42), the two ends of the guide support rod (4) in the length direction are respectively connected to the support base (1) and the support top plate (11), the length direction of the guide support rod (4) is parallel to the length direction of the support leg (12), and the eddy current mass system and the guide support rod (4) are both arranged in the support device.

2. The eddy current mass system for a damper according to claim 1, wherein: The fixed magnet (54) is a permanent magnet or an electromagnet.

3. The eddy current mass system for a damper according to claim 1, wherein: The magnetic flux line cutting mechanism comprises a conductor mounting rod (52) and two conductor discs (521) mounted on both sides of the conductor mounting rod (52); Alternatively, the magnetic flux line cutting mechanism includes a conductor mounting rod (52) made of a conductor material.

4. The novel tuned inertial eddy current damper according to claim 1 is characterized in that: The supporting device further comprises: A support reinforcement assembly, comprising a plurality of transverse reinforcement rods (13) and a plurality of longitudinal reinforcement rods (14), wherein the transverse reinforcement rods (13) are arranged between the two support legs (12) on the same plane in the length direction of the support device, and the longitudinal reinforcement rods (14) are arranged between the two support legs (12) on the same plane in the width direction of the support device.

5. The novel tuned inertial eddy current damper according to claim 1 is characterized in that: It includes: A tuning system comprising a plurality of elastic telescopic members (3), wherein the elastic telescopic members (3) are connected to the damping mass block (2) and are used to transmit vibration to the damping mass block (2) and drive the damping mass block (2) to perform relative displacement with the vibration.

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