Eddy current mass system and novel tuning inertial eddy current damper

Abstract

The invention discloses an eddy current mass system and a novel tuning inerter eddy current damper, and relates to the field of dampers, the eddy current mass system for the damper comprises a damping mass block, a first installation space is formed in the damping mass block, and a rotating gear is arranged in the first installation space; the eddy current damping system comprises a magnetic induction line generator, a magnetic induction line cutting mechanism and a supporting rotating shaft, the magnetic induction line generator is provided with a second installation space for forming magnetic induction lines, the magnetic induction line cutting mechanism is located in the second installation space, and the supporting rotating shaft is arranged in the magnetic induction line generator in a penetrating mode; and the support rotating shaft is fixed with the magnetic induction line cutting mechanism, and is coaxially connected with a rotating shaft of the rotating gear. The problem that in the prior art, it is difficult to provide enough damping force to effectively control large-amplitude vibration under low-frequency vibration and a small damping coefficient is solved.

Description

Technical Field

[0001] The 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 Damper (TMD) is widely used in the field of engineering for vibration control of bridges, high-rise buildings and mechanical equipment. Compared with other types of dampers, TMD converts structural vibration into the motion of mass unit by tuning its own frequency to be close to the structural frequency, and dissipates energy through the damping unit to achieve efficient vibration reduction effect.

[0003] However, as the controlled frequency continues to decrease, the limitations of traditional tuned dampers begin to emerge. Low-frequency vibrations (such as ultra-low frequency vibrations caused by wind loads or earthquakes, with frequencies below 1 Hz) are particularly significant on large structures. In this case, traditional tuned dampers are difficult to be effectively applied in actual engineering due to the large mass and space required. 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] In order to meet this challenge, ultra-low frequency inertial dampers came into being. This type of damper combines the advantages of inertial mass, with a rotating gear installed on the damping mass block, and a guide rod with a guide rack installed in the support device of the damper. The moving path of the damping mass block is limited by the matching structure of the rotating gear and the guide rack, thereby amplifying the equivalent vibration mass of the tuned mass damper to solve the problem of excessive net elongation of the spring of the ultra-low frequency vertical tuned mass damper, greatly reducing the static elongation and usage of the spring, solving the contradiction between the low stiffness of the ultra-low frequency tuned damper spring and the large elongation of the balanced damping mass block under the action of gravity, breaking through the technical bottleneck of vertical ultra-low frequency tuned damping vibration reduction of the main beam of a large-span bridge, and meeting the vertical installation space requirements of a large-span bridge.

[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 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 formed on the damping mass block, and a rotating gear is arranged 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 arranged 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 implementation, 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, the embodiment of the present application provides a novel tuned inertial eddy current damper, which includes:

[0016] An eddy current mass system for a damper as claimed in any one of claims 1 to 5;

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

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

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

[0020] In conjunction with the second aspect, in one implementation, 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 is connected to the supporting base via the supporting legs.

[0022] The eddy current mass system and the guide support rod for the damper as claimed in any one of claims 1 to 5 are both arranged in the supporting device.

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

[0024] A support reinforcement assembly, 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 implementation, a novel tuned inertial eddy current damper further includes:

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

[0027] The beneficial effects brought by the technical solution 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, thereby 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 drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.

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

[0031] Figure 2 It is a cross-sectional schematic diagram 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 baffle; 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 solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, 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 1The overall structural diagram of a novel tuned inertial eddy current damper in the present application, an eddy current mass system and a novel tuned inertial eddy current damper disclosed in the present application, the embodiment of the present application is described in a state where 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 the 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, the length direction of the guide support rod 4 is parallel to the length direction of the support leg 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 penetrated in the magnetic flux generator and fixed with the magnetic flux cutting mechanism, and the supporting rotating shaft 51 is coaxially connected with the rotating shaft of the rotating gear 42.

[0037] When the damping mass block 2 is affected by vibration, the tuning device transmits the vibration to the damping mass block 2, and the rotating gear 42 rotates to drive the damping mass block 2 to move on the guide rack 41. The rotating gear 42 rotates and drives the supporting rotating shaft 51 coaxially connected to the rotating gear 42 to rotate, so as to drive the magnetic flux cutting mechanism to rotate in the second installation space 53, and cut the magnetic flux formed by the magnetic flux generator in the second installation space 53, thereby additionally increasing the Lorentz force, and increasing the damping force with the weight of the damping mass block 2, solving the problem of the difficulty in providing sufficient damping force under low-frequency vibration and small damping coefficient in the prior art, and effectively controlling large-amplitude vibration. By adding the eddy current damping system, more precise control of low-frequency vibration is achieved, significantly improving the vibration reduction effect of the damper, and reducing the limitations of the damper in dealing with large-amplitude vibration compared with traditional technologies.

[0038] Further, the magnetic flux generator includes an eddy current disk 5 and a fixed magnet 54, referring to Figure 2 A cross-sectional schematic diagram of a novel tuned inertial eddy current damper in this application and Figure 3The partial enlarged view of the middle A part shows that the damping mass block 2 has a first installation space in the middle, and the eddy current disk 5 is fixed to the damping mass block 2 through the eddy current disk 5 support frame, so that the eddy current disk 5 can move with the movement of the damping mass block 2; the eddy current disk 5 has a second installation space 53, and fixed magnets 54 are arranged on the two opposite side walls of the second installation space 53, and magnetic flux lines can be formed between the two fixed magnets. The support rotation shaft 51 passes through the damping mass block 2 and the eddy current disk 5 at the same time from the middle of the damping mass block 2, and the length direction of the support rotation shaft 51 is parallel to the length direction of the damping mass block 2. The rotating shaft of the rotating gear 42 is formed by a part of the supporting rotating shaft 51. 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 block 2 is made of a plurality of mass block units assembled by connecting bolts, which is simple to install and convenient for operators to adjust the weight of the damping mass block 2. In order to further guide the movement of the damping mass block 2, a plurality of guide pulleys 43 are also installed on the surface of the damping mass block 2, and the guide pulleys 43 abut against the support legs 12 and the guide support rods 4 to facilitate the sliding of the damping mass block 2.

[0040] The fixed magnet 54 is specifically selected from permanent magnets or electromagnets. In actual use, the magnetic field strength in the second installation 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; or 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 is 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 to add an additional conductor disk.

[0041] The support frame of the eddy current disc 5 is fixed in the first installation space of the damping mass block 2 by means of mounting bolts, and has a simple structure and is easy to install. The top of the eddy current disc 5 extends out from the top surface of the damping mass block 2, and a cover plate is provided at the extension portion of the top of the eddy current disc 5, so that the operator can open the cover plate to adjust the fixed magnet 54 in the second installation space 53. A reinforcing bolt is also installed on the rotating shaft of the rotating gear 42 to make the connection between the rotating gear 42 and the supporting rotating shaft 51 tighter.

[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 supporting base 1, a plurality of connecting holes 311 being provided on the tuning baffle, each connecting hole 311 being provided with an elastic telescopic member 3, the two ends of the elastic telescopic member 3 in the length direction being connected to the tuning baffle 31 and the bottom of the damping mass block 2 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 damping mass block 2 to move more stably, a tuning baffle 31 can also be provided between the supporting 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, which can be selected 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 1, the supporting rotating shaft 51 passes through the two ends of the damping mass block 2, and two inertial mass disks 21 are specifically provided. The inertial mass disk 21 is installed on the passing section of the supporting rotating shaft 51 by bolts, and a plurality of counterweights 211 are installed on the inertial mass disk 21 by mounting bolts. The inertial mass disk 21 can rotate with the rotation of the supporting rotating shaft 51, and can provide additional inertial mass for the damping mass block 2 when the inertial mass disk 21 rotates. Specifically, the number of counterweights 211 can be selected according to 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, and 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 length 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 and other metal materials. Steel not only has extremely high tensile strength and compressive strength, but also can maintain the integrity of the transverse reinforcing rods 13 and the longitudinal reinforcing rods 14 under extreme conditions. It also has good plasticity and toughness, can absorb and disperse a large amount 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, the weldability and processability of steel are also excellent, which is convenient for 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 and other materials may be used to make the transverse reinforcing rod 13 and the longitudinal reinforcing rod 14. Although the strength of aluminum alloy is slightly inferior to that of steel, it has a low density and light weight, which is very beneficial for application scenarios that need to reduce the overall weight. Titanium alloy is known for its high strength, low density and good corrosion resistance, and is suitable for applications in extremely harsh environments. The selection of specific materials can be flexibly changed according to the actual application scenario.

[0045] In the description of the present application, it should be noted that the terms "upper", "lower", etc. 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 the present application and simplifying the description, rather than indicating or implying 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 the present 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present 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 only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such 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 including 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, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0047] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An eddy current mass system for a damper, characterized in that: It includes: A damping mass block (2), 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; An eddy current damping system, the eddy current damping system comprising a magnetic flux generator, a magnetic flux cutting mechanism and a supporting rotating shaft (51), the magnetic flux generator having a second installation space (53) for forming magnetic flux, the magnetic flux cutting mechanism being located in the second installation space (53), the supporting rotating shaft (51) passing through the magnetic flux generator and being fixed to the magnetic flux cutting mechanism, the supporting rotating shaft (51) being coaxially connected to the rotating shaft of the rotating gear (42).

2. The eddy current mass system for a damper according to claim 1, characterized in that: The magnetic flux generator comprises an eddy current disk (5) and a fixed magnet (54), the eddy current disk (5) having the second installation space (53), fixed magnets (54) being arranged on both inner side walls of the eddy current disk (5), and the magnetic flux cutting mechanism being located between the two fixed magnets (54).

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

4. The eddy current mass system for a damper according to claim 1, characterized in that: 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 comprises a conductor mounting rod (52) made of a conductor material.

5. The eddy current mass system for a damper according to claim 1, characterized in that: The rotating shaft of the rotating gear (42) is formed by a part of the supporting rotating shaft (51), so that the rotating gear (42) and the magnetic flux line cutting mechanism share the same rotating shaft.

6. A new type of tuned inertial eddy current damper, characterized in that: It includes: An eddy current mass system for a damper as claimed in any one of claims 1 to 5; and a guide support rod (4), wherein the guide support rod (4) is inserted into the first space, and a guide rack (41) meshing with the rotating gear (42) is provided on the guide support rod (4).

7. The novel tuned inertial eddy current damper according to claim 6 is characterized in that: It includes: An inertial mass device comprises an inertial mass disk (21) and a plurality of counterweight blocks (211), wherein the plurality of counterweight blocks (211) are detachably arranged on the inertial mass disk (21), and the inertial mass disk (21) is arranged on the supporting rotating shaft (51).

8. The novel tuned inertial eddy current damper according to claim 6 is characterized in that: It includes: 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). The eddy current mass system for the damper as claimed in any one of claims 1 to 5 and the guide support rod (4) are both arranged in the support device.

9. The novel tuned inertial eddy current damper according to claim 8 is characterized in that: The supporting device also includes: A support reinforcement assembly, the support reinforcement assembly comprising a plurality of transverse reinforcing rods (13) and a plurality of longitudinal reinforcing rods (14), the transverse reinforcing rods (13) being arranged between two support legs (12) on the same plane in the length direction of the support device, and the longitudinal reinforcing rods (14) being arranged between two support legs (12) on the same plane in the width direction of the support device.

10. The novel tuned inertial eddy current damper according to claim 6 is characterized in that: It includes: A tuning system, the tuning system comprising a plurality of elastic telescopic parts (3), the elastic telescopic parts (3) being connected to the damping mass block (2) and used for transmitting vibration to the damping mass block (2) and driving the damping mass block (2) to make relative displacement with the vibration.

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