Conductor slotting type axial eddy current damper

Abstract

The utility model discloses a conductor slotting type axial eddy current damper, and belongs to the technical field of energy dissipation and vibration reduction control. According to the utility model, the problem that the damping force of the conventional conductor slotted eddy current damper cannot be adjusted in real time is solved. The fixing disc comprises an upper fixing disc body and a lower fixing disc body which are oppositely arranged on the outer side of the connecting pipe, the damping assemblies are fixedly connected to the upper fixing disc body and the lower fixing disc body in an up-down opposite mode, each damping assembly comprises an iron core, an excitation winding and a permanent magnet, the excitation winding is wound around the periphery of the iron core, and the permanent magnet is fixedly connected to one end of the iron core. The other end of the iron core is fixedly connected to the fixed disc, through grooves are formed in the conductor disc and distributed in a radial mode, the conductor disc is fixedly connected to the lead screw nut, and the intelligent control module is electrically connected with the excitation winding. Structural vibration signals are captured through the intelligent control module, the magnitude and direction of current input into the excitation winding are changed in real time, damping force is adjusted in real time, and structural vibration is effectively reduced.

Description

Technical Field

[0001] This utility model relates to a conductor slotted axial eddy current damper, belonging to the field of energy dissipation and vibration reduction control technology. Background Technology

[0002] Eddy current dampers are a novel type of damping device that utilizes the phenomenon of electromagnetic induction. When a conductor in a magnetic field cuts magnetic field lines, the change in magnetic flux through the closed loop induces eddy currents within the conductor. These eddy currents exert an Ampere force on the conductor, which macroscopically manifests as a force opposing the conductor's original motion—the eddy current damping force. Simultaneously, the conductor's resistance converts its kinetic energy into heat energy through the eddy currents, which is ultimately dissipated.

[0003] Compared to some common dampers in the field of energy dissipation and vibration reduction control of structural vibrations, eddy current dampers are particularly suitable for working environments requiring long fatigue life and difficult maintenance. Their advantages include: no reliance on mechanical friction for energy dissipation; no leakage or sealing issues; high energy density, high reliability, ease of maintenance, and good durability. Due to the advantage of a large radial eddy current amplitude, the slotted conductor eddy current damper structure exhibits better intelligent damping performance compared to traditional smooth conductor structures. Therefore, the slotted conductor eddy current damper structure has attracted increasing attention.

[0004] Currently, research and application of axial eddy current dampers in the field of civil engineering are mainly based on passive control. Axial eddy current dampers that can achieve intelligent control effects still need further exploration and development in terms of structural design, damping force model, dynamic characteristics, fatigue performance, control algorithm and vibration reduction control effect. Furthermore, the eddy current dampers currently used in the field of civil engineering have problems such as inconvenient adjustment of the damping coefficient, low utilization of the magnetic field and inability to adjust the damping force in real time according to the structural vibration signal. Utility Model Content

[0005] The present invention aims to solve the above-mentioned problems and provides a conductor slotted axial eddy current damper.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] A slotted axial eddy current damper includes a connecting pipe, a ball screw, a fixed disk, a conductor disk, multiple damping components, and an intelligent control component. The ball screw is inserted into the connecting pipe, and the screw nut is connected to the connecting pipe. The fixed disk includes an upper fixed disk and a lower fixed disk opposite to each other on the outside of the connecting pipe. The multiple damping components are fixedly connected to the upper and lower fixed disks, one above the other. Each damping component includes an iron core, an excitation winding, and a permanent magnet. The excitation winding is wound around the periphery of the iron core, and the permanent magnet is fixed to one end of the iron core. The other end of the iron core is fixed to the fixed disk. The conductor disk has through slots that are radially distributed. The conductor disk is fixed to the screw nut. The intelligent control module includes an acceleration sensor, a microprocessor, and a current regulator. The acceleration sensor, microprocessor, and current regulator are electrically connected, and the current regulator is electrically connected to the excitation winding.

[0008] Furthermore, the lead screw nut is connected to the connecting pipe via a thrust bearing.

[0009] Furthermore, the upper fixed plate and the lower fixed plate are connected by an annular cylinder.

[0010] Furthermore, in the vertically opposed damping components, the N pole and S pole of the permanent magnet are opposite each other.

[0011] Furthermore, a gap is left between the permanent magnet and the conductor disk, with the gap ranging from 1mm to 5mm.

[0012] Furthermore, the permanent magnet is a columnar sector magnet.

[0013] Furthermore, the connecting pipe, iron core, annular cylinder, and fixed disk are all made of high magnetic permeability material, and the conductor disk is made of high electrical conductivity material.

[0014] Furthermore, all of the electrical connections are DC power supply connections.

[0015] Furthermore, the distance between the conductor disk and the upper and lower fixed disks is equal.

[0016] Furthermore, the upper connecting end is fixed to the top of the ball screw, and the lower connecting end is fixed to the bottom of the connecting tube.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] This invention forms a series magnetic circuit on the iron core through the excitation winding and permanent magnet. The magnetic field lines provided by the damping component pass perpendicularly through the conductor disk to form a gap magnetic field. The ball screws installed at both ends of the structural component drive linear motion through the relative motion of the two ends, and convert the relative motion of the structural vibration into the rotation of the conductor disk. Then, the conductor disk cuts the magnetic field lines of the gap magnetic field to generate damping force. The slotted structure of the conductor disk can significantly improve the damping force density, thereby effectively reducing the vibration of the structure.

[0019] This invention uses an intelligent control module to change the magnitude and direction of the input current in the excitation winding in real time according to the structural vibration signal, thereby achieving real-time adjustment of the damping force and achieving an effect close to active control. At the same time, the adjustment of the magnetic field strength by the intelligent control module can improve the magnetic field utilization rate and effectively save energy. Attached Figure Description

[0020] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0021] Figure 1 A schematic diagram of a conductor slotted axial eddy current damper.

[0022] Figure 2 This is a schematic diagram of the magnetic pole arrangement of the permanent magnets fixed on the upper fixed plate;

[0023] Figure 3 This is a schematic diagram of the magnetic pole arrangement of the permanent magnets fixed on the lower fixed plate;

[0024] Figure 4 A schematic diagram of the magnetic flux flow direction of a slotted axial eddy current damper under positive excitation current conditions.

[0025] Figure 5 A schematic diagram of the intelligent control module in a slotted axial eddy current damper for conductors.

[0026] In the diagram: 1. Upper connecting end; 2. Ball screw; 3. Iron core; 4. Fixed plate; 4-1. Upper fixed plate; 4-2. Lower fixed plate; 5. Excitation winding; 6. Permanent magnet; 7. Conductor disk; 8. Annular cylinder; 9. Thrust bearing; 10. Screw nut; 11. Lower connecting end; 12. Connecting pipe; 13. Through slot. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] See appendix Figure 1-5 This embodiment describes a conductor slotted axial eddy current damper, comprising a connecting pipe 12, a ball screw 2, a fixed disk 4, a conductor disk 7, multiple damping components, and an intelligent control component. The screw of the ball screw 2 is inserted into the connecting pipe 12, and the screw nut 10 is connected to the connecting pipe 12. The fixed disk 4 includes an upper fixed disk 4-1 and a lower fixed disk 4-2 arranged opposite to each other. The multiple damping components are fixedly connected to the upper fixed disk 4-1 and the lower fixed disk 4-2, and each damping component includes an iron core. 3. Excitation winding 5 and permanent magnet 6: Excitation winding 5 is wound around the periphery of iron core 3, permanent magnet 6 is fixed to one end of iron core 3, and the other end of iron core 3 is fixed to fixed disk 4. Through slots 13 are opened on the conductor disk 7, and the through slots 13 are radially distributed. The conductor disk 7 is fixed to lead screw nut 10. The intelligent control module includes an acceleration sensor, a microprocessor and a current regulator. The acceleration sensor, microprocessor and current regulator are electrically connected, and the current regulator is electrically connected to excitation winding 5.

[0030] This invention utilizes a damping component to create a gap magnetic field by perpendicularly passing magnetic field lines through a conductor disk. Magnetic field lines generated by the excitation winding and permanent magnet form a series magnetic circuit via the iron core of the fixed disk. Ball screw pairs installed at both ends of the structural component drive linear motion through relative motion at both ends, converting the relative motion of structural vibration into rotation of the conductor disk. The slotted structure of the conductor disk significantly increases the damping force density, thereby effectively reducing structural vibration. This invention also uses an intelligent control module to adjust the magnitude and direction of the input current in the excitation winding in real time based on the structural vibration signal, thus achieving real-time adjustment of the damping force. Specifically, when the damping force does not need adjustment... When the conductor slotted eddy current intelligent damper maintains a fixed damping force to counteract structural vibration, the intelligent control module does not input current into the excitation winding 5, ensuring the normal operation of the damper while effectively saving energy. When the damping force needs to be adjusted, the intelligent control module captures the structural vibration signal to change the magnitude and direction of the current input to the excitation winding 5 in real time, thereby adjusting the magnetic field strength between the conductor disk 7 and the permanent magnet 6. This real-time adjustment of the damping force effectively reduces structural vibration. Furthermore, the adjustment of the magnetic field strength by the intelligent control module not only improves the magnetic field utilization rate but also effectively saves energy.

[0031] The lead screw nut 10 is connected to the connecting pipe 12 via a thrust bearing.

[0032] The upper fixed plate 4-1 and the lower fixed plate 4-2 are connected by an annular cylinder 8. The annular cylinder 8 and the fixed plate 4 are connected to form a closed structure, which can prevent external magnetic fields from interfering with the magnetic field in the conductor slotted axial eddy current damper, protect the internal structure, and effectively eliminate magnetic leakage.

[0033] In the vertically opposed damping assembly, the N pole and S pole of the permanent magnet 6 are aligned. By aligning the N pole and S pole of the permanent magnet 6, the magnetic field strength can be increased, the damping force adjustment range can be expanded, and the magnetic field utilization rate can be improved.

[0034] A gap, ranging from 1mm to 5mm, is left between the permanent magnet 6 and the conductor disk 7. A gap magnetic field is formed through the gap between the permanent magnet 6 and the conductor disk 7. The magnetic field strength in the gap magnetic field is adjusted by the magnitude and direction of the current input to the excitation winding 5 through the intelligent control module. As a result, when the conductor disk 7 rotates and cuts the magnetic field lines in the gap magnetic field, eddy currents are generated. The eddy currents cause the Ampere force on the conductor cylinder 10 to manifest as a damping force that opposes the rotation of the conductor cylinder 10, thereby achieving a real-time adjustment effect.

[0035] The permanent magnet 6 is a columnar sector magnet. The magnetic field of the sector magnet is concentrated at the central arc of the sector region, which facilitates the formation of a uniform radial magnetic field.

[0036] The connecting pipe 12, iron core 3, annular cylinder 8, and fixed disk 4 are all made of high magnetic permeability material, and the conductor disk 7 is made of high electrical conductivity material. Preferably, the high magnetic permeability material is electrical soft iron. Electrical soft iron has better magnetic permeability and can effectively reduce the occurrence of magnetic leakage.

[0037] All electrical connections are DC power supply connections. DC power supplies are easy to adjust in magnitude and direction. Specifically, when a positive DC current is applied to the excitation winding 5, the direction of the magnetic field it generates is consistent with the magnetization direction of the permanent magnet 6. At this time, the permanent magnet 6 and the excitation winding 5 work together, significantly increasing the gap magnetic field strength, thereby improving the output of the damping force. When a reverse DC current is applied to the excitation winding 5, the magnetic field generated by the excitation winding 5 is opposite in direction to the magnetic field of the permanent magnet 6, thus suppressing the gap magnetic field strength and effectively reducing the output of the damping force. When the applied current changes between positive and negative directions, the generated damping force also changes accordingly, thus achieving the effect of controlling the damping force by adjusting the direction and magnitude of the DC current. Furthermore, the DC power supply has a wider range of adjustable damping force, effectively reducing structural vibration.

[0038] The conductor disk 7 is equidistant from the upper fixed disk 4-1 and the lower fixed disk 4-2. By equidistantizing the conductor disk from the upper and lower fixed disks, the normal force acting on the conductor disk is balanced.

[0039] The upper connecting end 1 is fixed to the top of the ball screw 2, and the lower connecting end 11 is fixed to the bottom of the connecting pipe 12. The upper connecting end 1 and the lower connecting end 11 are connected to the structure that generates vibration. The vibration of the structure drives the ball screw 2 to move, which in turn drives the conductor disk 7 to rotate and cut the magnetic field lines of the gap magnetic field. Eddy currents are then generated within the conductor disk 7. The Ampere force on these eddy currents acts as a damping force that opposes the rotation of the conductor disk 7. The lower connecting end 11 is the fixed end of the conductor slotted axial eddy current damper.

[0040] This utility model discloses a slotted conductor axial eddy current damper. Its working principle is as follows: Magnetic field lines provided by the damping component perpendicularly pass through the conductor disk to form a gap magnetic field. Magnetic field lines generated by the excitation winding and permanent magnet form a series magnetic circuit via the iron core of the fixed disk. Ball screws installed at both ends of the structural component drive linear motion through relative motion at both ends, converting the relative motion of structural vibration into rotation of the conductor disk. The conductor disk then cuts the magnetic field lines of the gap magnetic field, generating damping force. An intelligent control module adjusts the magnitude and direction of the input current in the excitation winding in real time according to the structural vibration signal, thereby achieving real-time adjustment of the damping force. When the structure is not vibrating, the slotted conductor axial eddy current damper... The connection ends of the flow damper are in the initial stationary position, and the conductor disk 7 and the permanent magnet 6 remain stationary, without generating damping force. When the structure vibrates and drives the screw of the ball screw 22 to move, the screw nut 10 drives the conductor disk 7 to rotate and cut the magnetic field lines of the gap magnetic field. Eddy currents are then generated in the slotted conductor disk 7. The Ampere force on the eddy currents acts as a damping force that opposes the rotation of the conductor disk 7. At the same time, the accelerometer collects the structural vibration signal and transmits it to the microprocessor. The microprocessor executes the control algorithm and issues instructions to control and adjust the magnitude and direction of the current in the input excitation winding 5, change the gap magnetic field strength, and thus adjust the magnitude of the damping force, achieving the effect of intelligent control. Specifically, the magnetic flux generated by the damping component fixed to the upper fixed plate passes through the slot and gap magnetic field of the conductor disk to the damping component fixed to the lower fixed plate, then through the lower fixed plate to the adjacent damping component, and then through the gap magnetic field and the slot of the conductor disk to the damping component fixed to the upper fixed plate. This cycle eventually returns to the original damping component to form a series magnetic circuit. When a positive DC current is applied to the excitation winding 5, the direction of the magnetic field it generates is consistent with the magnetization direction of the permanent magnet 6. At this time, the permanent magnet 6 and the excitation winding 5 work together, which can significantly increase the strength of the gap magnetic field, thereby increasing the output of the damping force. When a reverse DC current is applied to the excitation winding 5, the excitation winding... The magnetic field generated by 5 is opposite in direction to the magnetic field of permanent magnet 6, thereby weakening the gap magnetic field strength and effectively reducing the output of damping force. When the current flowing through the excitation winding 5 changes between the forward and reverse directions, the damping force generated by the conductor disk 7 will also change accordingly, thus achieving the effect of controlling the output of damping force by adjusting the direction and magnitude of the direct current. When no current flows through the excitation winding 5, the magnetic field source is entirely provided by permanent magnet 6. At this time, the damper is equivalent to a passive axial eddy current damper. When the damping force does not need to be adjusted, no current is flowed, which not only ensures the normal use of the damper, but also effectively saves energy.

[0041] Obviously, the above-disclosed embodiments of the present invention are merely for illustrating the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to specific implementations. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. It is neither necessary nor possible to exhaustively describe all implementation methods here.

Claims

1. A conductor slotted axial eddy current damper, characterized in that: The system includes a connecting pipe (12), a ball screw (2), a fixed plate (4), a conductor disk (7), multiple shock-absorbing components, and an intelligent control module. The screw of the ball screw (2) is inserted into the connecting pipe (12), and the screw nut (10) is connected to the connecting pipe (12). The fixed plate (4) includes an upper fixed plate (4-1) and a lower fixed plate (4-2) arranged opposite to each other on the outside of the connecting pipe (12). The multiple shock-absorbing components are fixedly connected to the upper fixed plate (4-1) and the lower fixed plate (4-2) respectively. Each shock-absorbing component includes an iron core (3), an excitation winding ( 5) and permanent magnet (6), excitation winding (5) is wound around the periphery of iron core (3), permanent magnet (6) is fixed to one end of iron core (3), and the other end of iron core (3) is fixed to fixed disk (4). Through slot (13) is opened on conductor disk (7), and the through slot (13) is radially distributed. Conductor disk (7) is fixed to lead screw nut (10). The intelligent control module includes acceleration sensor, microprocessor and current regulator. Acceleration sensor, microprocessor and current regulator are electrically connected. Current regulator is electrically connected to excitation winding (5).

2. The conductor slotted axial eddy current damper according to claim 1, characterized in that: The lead screw nut (10) is connected to the connecting pipe (12) via the thrust bearing (9).

3. The conductor slotted axial eddy current damper according to claim 1, characterized in that: The upper fixed plate (4-1) and the lower fixed plate (4-2) are connected by an annular cylinder (8).

4. A conductor slotted axial eddy current damper according to claim 1, characterized in that: The N pole and S pole of the permanent magnet (6) in the upper and lower opposing shock-absorbing components are opposite each other.

5. A conductor slotted axial eddy current damper according to claim 1, characterized in that: A gap is left between the permanent magnet (6) and the conductor disk (7), with the gap ranging from 1 mm to 5 mm.

6. A conductor slotted axial eddy current damper according to claim 1, characterized in that: The permanent magnet (6) is a columnar sector magnet.

7. A conductor slotted axial eddy current damper according to claim 3, characterized in that: The connecting pipe (12), iron core (3), annular cylinder (8) and fixed disk (4) are all made of high magnetic permeability material, and the conductor disk (7) is made of high electrical conductivity material.

8. A conductor slotted axial eddy current damper according to claim 1, characterized in that: All electrical connections are DC power supply connections.

9. A conductor slotted axial eddy current damper according to claim 1, characterized in that: The conductor disk (7) is equidistant from the upper fixed disk (4-1) and the lower fixed disk (4-2).

10. A conductor slotted axial eddy current damper according to claim 1, characterized in that: The upper connecting end (1) is fixed to the top of the ball screw (2), and the lower connecting end (11) is fixed to the bottom of the connecting pipe (12).

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