Self-adaptive adjustable resonant frequency electromagnetic eddy current vibration reduction system and method

Abstract

The invention discloses a self-adaptive adjustable resonant frequency electromagnetic eddy current vibration reduction system and method. The system comprises an equipment structural plate, a spring adjustable structure, a mass body, a first electromagnet structure, an information acquisition instrument, a numerical control power supply and a controller. The equipment structural plate is of a hollow closed box structure, the first electromagnet structure is installed on the outer wall of the mass body, an air gap sliding structure is formed between the first electromagnet structure and the inner wall of the equipment structural plate, the mass body is movably arranged in the equipment structural plate, and the spring adjustable structure is arranged between the mass body and the equipment structural plate. The first electromagnet structure is electrically connected with an information acquisition instrument and a numerical control power supply which are positioned outside the equipment structural plate; and the controller outside the equipment structural plate is electrically connected with the numerical control power supply and the information acquisition instrument. The invention relates to the technical field of equipment vibration reduction, and can solve the problem that in the prior art, a traditional passive vibration reduction mechanism cannot meet the precise vibration reduction requirement in real time.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment vibration damping, and particularly to an electromagnetic eddy current vibration damping system and method with an adaptive adjustable resonance frequency. Background Art

[0002] Vibration damping technology plays a crucial role in modern industrial and engineering fields, and the demand for vibration damping technology in various fields is increasing day by day. The vibration damping structure can not only reduce vibration and noise, improve the stability and service life of equipment, but also significantly enhance the working performance and safety of the system. In the construction field and other emerging industrial fields, vibration damping technology has gradually become a key factor in improving equipment performance.

[0003] Currently, passive vibration damping technologies such as springs and rubber shock absorbers are mostly applied in a large number of scenarios. They have low costs and mature technologies. However, with the rapid development of technology, in the face of the precision of modern industrial equipment and more complex working environments, traditional passive vibration damping technologies are difficult to meet precise requirements. Therefore, it is necessary to provide an electromagnetic eddy current vibration damping system and method with an adaptive adjustable resonance frequency, which can solve the problem that traditional passive vibration damping mechanisms in the prior art cannot meet precise vibration damping requirements in real time. Summary of the Invention

[0004] The purpose of the present invention is to provide an electromagnetic eddy current vibration damping system and method with an adaptive adjustable resonance frequency, which can solve the problem that traditional passive vibration damping mechanisms in the prior art cannot meet precise vibration damping requirements in real time.

[0005] The present invention is implemented as follows:

[0006] An electromagnetic eddy current vibration damping system with an adaptive adjustable resonance frequency includes an equipment structure plate, a spring adjustable structure, a mass body, a first electromagnet structure, an information collector, a numerical control power supply, and a controller; the equipment structure plate is a hollow closed box structure, the first electromagnet structure is installed on the outer wall of the mass body and forms an air-gap sliding structure with the inner wall of the equipment structure plate, so that the mass body is movably arranged in the equipment structure plate, the spring adjustable structure is arranged between the mass body and the equipment structure plate, the first electromagnet structure is electrically connected to the information collector and the numerical control power supply located outside the equipment structure plate; the controller located outside the equipment structure plate is electrically connected to the numerical control power supply and the information collector.

[0007] The equipment structure plate is a composite electromagnetic damping plate, an air-gap sliding structure is formed between the inner wall of the composite electromagnetic damping plate and the first electromagnet structure, and a first acceleration sensor is installed on the outer wall of the composite electromagnetic damping plate, and the first acceleration sensor is electrically connected to the information collector.

[0008] The described mass body includes a mass body housing and a mass block structure; the first electromagnet structure is arranged on the top and bottom surfaces of the mass body housing, enabling the mass body housing to be movably arranged within the equipment structural plate; the mass block structure is adjustably arranged within the mass body housing through a spring adjustable structure.

[0009] The described first electromagnet structure includes a number of first electromagnets arranged in an array on the outer wall of the mass body housing and a first coil connecting the number of first electromagnets; the first coil is electrically connected to a numerical control power supply, and a first temperature sensor is installed on the first coil, and the first temperature sensor is electrically connected to an information collector.

[0010] The described spring adjustable structure includes a lead screw and a servo spring array. The servo spring array is a variable compression stiffness spring body composed of multiple springs of different specifications. One end of the servo spring array is adjustably installed on the side wall of the equipment structural plate through the lead screw, and the other end of the servo spring array is embedded in the side wall of the mass body housing, enabling the mass block structure to be in contact with the other end of the servo spring array after movement; the spring adjustable structure is arranged in pairs and symmetrically on both sides of the mass block structure.

[0011] A displacement sensor is provided between the equipment structural plate and the servo spring array, and the displacement sensor is electrically connected to the information collector.

[0012] The described mass block structure includes a mass block housing, a mass rod, mass blocks, a second electromagnet structure, and a permanent magnet; both ends of the mass rod respectively penetrate the two side walls of the mass block housing and the two side walls of the mass body housing and are installed on the two side walls of the equipment structural plate. One ends of a number of mass blocks are symmetrically arranged on the mass rod and are located within the mass block housing, and the other ends of the number of mass blocks are respectively provided with a second electromagnet structure; the permanent magnet is arranged on the inner wall of the mass block housing and is arranged opposite to the number of second electromagnet structures.

[0013] The described second electromagnet structure includes a number of second electromagnets arranged in an array on the mass blocks and a second coil connecting the number of second electromagnets. The second coil is electrically connected to the numerical control power supply, enabling the number of second electromagnets to correspondingly adsorb the number of permanent magnets.

[0014] A second temperature sensor and a second acceleration sensor are installed on the inner wall of the mass body housing, and the second temperature sensor and the second acceleration sensor are electrically connected to the information collector.

[0015] An electromagnetic eddy current damping method with an adaptive adjustable resonance frequency includes the following steps:

[0016] Step 1: Respectively encode a number of second electromagnets and permanent magnets within the mass body;

[0017] Step 2: Control the numerical control power supply through the controller to input current to multiple encoded second electromagnets, so that the multiple second electromagnets have magnetism and adsorb the permanent magnets at corresponding positions, so that multiple mass blocks become a mass body working together;

[0018] Step 3: Adjust the compression amount of the servo spring array through the lead screw of the spring adjustable structure, so as to adjust the distance between one end of the servo spring array located inside the mass body housing and the mass block structure;

[0019] When a set of spring adjustable structures and all mass blocks work, the frequency of the device is the lowest, which is f L ; When all spring adjustable structures and no mass blocks work, the frequency of the device is the highest, which is f H ; The flexible adjustment of the frequency f of the device is realized by adjusting the working quantity of different spring adjustable structures and mass blocks, and the adjustment range is f L <f<f H ;

[0020] Step 4: When the device is subjected to an external force F, the device structure board and the mass body and the first electromagnet structure inside it move. The data of the first acceleration sensor, the second acceleration sensor, the first temperature sensor, the second temperature sensor, and the displacement sensor are collected in real time by the information collector, and the data is transmitted to the controller, and the controller processes and analyzes the data;

[0021] Step 5: The controller issues a current adjustment instruction to the numerical control power supply according to the processing and analysis results, so that the numerical control power supply adjusts the input current and the current input position of the second electromagnet according to the current adjustment instruction;

[0022] Step 6: The mass body drives the first electromagnet to move inside the device structure board, so that the composite electromagnetic damping plate cuts the magnetic induction lines formed by the first electromagnet and generates a corresponding induced electromotive force. The induced electromotive force generates a magnetic field and hinders the movement of the mass body inside the device structure board, so as to adjust the magnitude of the damping force provided by the electromagnetic eddy current damping system and achieve the vibration damping effect and the adaptive adjustment of the resonance frequency.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Since the present invention is provided with a device structure board, a mass body and a first electromagnet structure, when the device structure board is stressed, the mass body and the first electromagnet structure move relative to each other inside the device structure board, and the device structure board cuts the magnetic induction lines of the first electromagnet to generate an electromotive force, and a magnetic field that hinders the movement of the mass body is generated according to Faraday's law of electromagnetic induction, so that the magnitude of the damping force of the electromagnetic eddy current damping system can be adjusted, and a corresponding resonance frequency is formed, providing an effective vibration damping effect for the device.

[0025] 2. Since the present invention is provided with a spring adjustable structure and a mass body, by numbering the second electromagnets and permanent magnets, the numerical control power supply can be controlled by the controller to supply power to different numbers and different positions of the second electromagnets, so that the corresponding second electromagnets and permanent magnets are adsorbed, for precisely adjusting the working mass of the mass block structure; at the same time, by adjusting the stiffness of the servo spring array and its distance from the mass block structure through the lead screw, the movement range of the mass block structure can be precisely adjusted to meet the accuracy requirements of the equipment vibration reduction demand and the adaptive intelligent adjustment requirements of the resonance frequency.

[0026] 3. Since the present invention is provided with a first acceleration sensor, a second acceleration sensor, a first temperature sensor, a second temperature sensor and a displacement sensor, it can monitor environmental data in real time, adapt to the requirements of different application scenarios, and intelligently control the input current and input position of the numerical control power supply through the data feedback of each sensor, and finally achieve the same frequency of the equipment vibration frequency and the system vibration, realizing the adaptive vibration reduction effect. Brief Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the electromagnetic eddy current vibration reduction system with adaptive adjustable resonance frequency of the present invention.

[0028] In the figure, 1 is the equipment structure board, 100 is the air gap sliding structure, 101 is the first acceleration sensor, 2 is the spring adjustable structure, 201 is the lead screw, 202 is the servo spring array, 203 is the displacement sensor, 300 is the mass body housing, 301 is the mass block housing, 302 is the mass rod, 303 is the mass block, 304 is the second electromagnet structure, 3041 is the second electromagnet, 3042 is the second coil, 305 is the permanent magnet, 306 is the second temperature sensor, 307 is the second acceleration sensor, 4 is the first electromagnet structure, 401 is the first electromagnet, 402 is the first coil, 403 is the first temperature sensor, 5 is the information collector, 6 is the numerical control power supply, and 7 is the controller. Detailed Embodiment

[0029] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0030] Please refer to the appendix Figure 1, An electromagnetic eddy current damping system with an adaptive adjustable resonance frequency, comprising an equipment structure plate 1, a spring adjustable structure 2, a mass body, a first electromagnet structure 4, an information collector 5, a numerical control power supply 6, and a controller 7; the equipment structure plate 1 is a hollow closed box structure, the first electromagnet structure 4 is installed on the outer wall of the mass body and forms an air gap sliding structure 100 with the inner wall of the equipment structure plate 1, so that the mass body is movably arranged in the equipment structure plate 1, the spring adjustable structure 2 is arranged between the mass body and the equipment structure plate 1, and the first electromagnet structure 4 is electrically connected to the information collector 5 and the numerical control power supply 6 located outside the equipment structure plate 1; the controller 7 located outside the equipment structure plate 1 is electrically connected to the numerical control power supply 6 and the information collector 5.

[0031] Install the equipment structure plate 1 on the equipment to be damped. When the equipment is subjected to an external force F, the equipment structure plate 1 is synchronously stressed, causing the mass body to move relative to the equipment structure plate 1 within the equipment structure plate 1. The spring adjustable structure 2 and the first electromagnet structure 4 are used to control the movement state of the mass body within the equipment structure plate 1, thereby providing different damping forces by using different movement states of the mass body, enabling the equipment to form corresponding resonance frequencies and achieving an accurately adjustable damping effect.

[0032] The numerical control power supply 6 is used to provide working current for the first electromagnet structure 4 and the mass body, and the numerical control power supply 6 is electrically connected to the controller 7 through a data interface. The information collector 5 is used to collect the movement states of the equipment structure plate 1, the spring adjustable structure 2, and the mass body, and the working temperatures of the first electromagnet structure 4 and the mass body after being energized, to ensure the safe operation of the entire electromagnetic eddy current damping system.

[0033] Preferably, the controller 7 adopts a real-time control system of the existing technology, including but not limited to a computer mainframe, etc., which is used to receive the data collected by the information collector 5, analyze and process the data, and corresponding data processing and analysis software can be installed in the controller 7 according to the actual data analysis and processing requirements. The data analysis and processing can be determined according to the damping requirements of different application equipment, which does not belong to the protection scope of this application, and the data analysis and processing process of the controller 7 will not be elaborated here.

[0034] The described equipment structure plate 1 is a composite electromagnetic damping plate. An air gap sliding structure 100 is formed between the inner wall of the composite electromagnetic damping plate and the first electromagnet structure 4. A first acceleration sensor 101 is installed on the outer wall of the composite electromagnetic damping plate, and the first acceleration sensor 101 is electrically connected to the information collector 5.

[0035] Preferably, the composite electromagnetic damping plate is designed and manufactured using high-efficiency electromagnetic damping materials of the prior art. It is composed of a conductive plate located on the inner side and a magnetic conductive plate located on the outer side, forming a box-shaped space structure that is closed in the up-down, front-back, and around directions. It can cut the magnetic induction lines formed by the first electromagnet structure 4 and is convenient to be installed on the equipment to be vibration-damped.

[0036] The first acceleration sensor 101 is used to monitor the movement displacement of the equipment structural plate 1 in real time, so as to timely obtain the movement state and vibration-damping situation of the equipment.

[0037] Preferably, an air-gap sliding structure 100 is formed between the first electromagnet 4 and the inner wall of the composite electromagnetic damping plate by using a pressure-bearing oil film structure or a rolling structure.

[0038] The air-gap sliding structure 100 can also adopt other structures that can move relatively. The gap width of the air-gap sliding structure 100 is as small as possible, which is used to reduce the friction between the first electromagnet 4 and the equipment structural plate 1 and realize free movement.

[0039] Take the Figure 1 direction of the lateral external force F shown in the figure as an example. The mass body includes a mass body housing 300 and a mass block structure; the first electromagnet structure 4 is arranged on the top surface and the bottom surface of the mass body housing 300, so that the mass body housing 300 is movably arranged in the equipment structural plate 1; the mass block structure is adjustably arranged in the mass body housing 300 through a spring adjustable structure 2.

[0040] When installing the equipment structural plate 1, the equipment structural plate 1 can be installed according to the direction of the external force F received by the equipment, so that the arrangement directions of the two groups of first electromagnet structures 4 are perpendicular to the direction of the external force F, and the axial direction of the spring adjustable structure 2 is parallel to the direction of the external force F.

[0041] After the equipment structural plate 1 is stressed, the mass body housing 300 moves laterally relative to the equipment structural plate 1 in the equipment structural plate 1. When the mass body housing 300 moves, it drives the first electromagnet structure 4 to move laterally synchronously, so that the composite electromagnetic damping plate cuts the magnetic induction lines generated by the first electromagnet structure 4. According to Faraday's law of electromagnetic induction, an electromotive force is generated when the composite electromagnetic damping plate cuts the magnetic induction lines. The electromotive force generates a magnetic field to hinder the movement of the mass body housing 300 in the equipment structural plate 1, thereby playing a role in providing a damping force and further achieving the effect of vibration damping.

[0042] The first electromagnet structure 4 includes a plurality of first electromagnets 401 arranged in an array on the outer wall of the mass body housing 300 and a first coil 402 connecting the plurality of first electromagnets 401; the first coil 402 is electrically connected to the numerical control power supply 6, and a first temperature sensor 403 is installed on the first coil 402. The first temperature sensor 403 is electrically connected to the information collector 5.

[0043] The numerical control power supply 6 inputs current to a plurality of first electromagnets 401 through the first coil 402, so that the first electromagnets 401 are energized to form electromagnetic eddy currents and generate electromagnetic fields. The first temperature sensor 403 is used to monitor the working temperature of the first electromagnet structure 4 in real time to avoid over-temperature danger.

[0044] Preferably, the first electromagnet 401 can be an electromagnet with high magnetic permeability in the shape of a square, a circle, etc. The first electromagnets 401 are arranged on the outer wall of the mass body housing 300 in an array form, and all the first electromagnets 401 are integrated together through the first coil 402, so that a certain electromagnetic eddy current can be formed after being energized.

[0045] The spring adjustable structure 2 includes a lead screw 201 and a servo spring array 202. The servo spring array 202 is a variable compression stiffness spring body composed of a plurality of springs with different specifications. One end of the servo spring array 202 is adjustably installed on the side wall of the equipment structure plate 1 through the lead screw 201, and the other end of the servo spring array 202 is embedded in the side wall of the mass body housing 300, so that after the mass block structure moves, it can contact the other end of the servo spring array 202; the spring adjustable structures 2 are arranged in pairs and symmetrically arranged on both sides of the mass block structure.

[0046] The number of springs and their stiffness specifications in the servo spring array 202 can be adaptively selected according to actual usage requirements. By combining springs with different numbers and different stiffnesses, the requirement of flexible adjustment of stiffness can be met. When the mass body housing 300 moves, it will contact the other end of the servo spring array 202. After being pressed by the mass body housing 300, the servo spring array 202 compresses and deforms and provides a reverse elastic force for the mass body housing 300, thereby restricting the movement amplitude of the mass body housing 300. The movement amplitude of the mass body housing 300 is flexibly adjustable, so that the damping force provided by the mass body housing 300 is also flexibly adjustable.

[0047] A displacement sensor 203 is provided between the equipment structure plate 1 and the mass body housing 300, and the displacement sensor 203 is electrically connected to the information collector 5.

[0048] The displacement sensor 203 is used to monitor the movement displacement of the mass body housing 300 in real time, so as to timely obtain the damping force that the mass body housing 300 can provide and perform adaptive adjustment according to the force condition.

[0049] The described mass block structure includes a mass block housing 301, a mass rod 302, a mass block 303, a second electromagnet structure 304, and a permanent magnet 305. Both ends of the mass rod 302 penetrate through the two side walls of the mass block housing 301 and the two side walls of the mass body housing 300 respectively and are installed on the two side walls of the equipment structure plate 1. One ends of several mass blocks 303 are symmetrically arranged on the mass rod 302 and are located inside the mass block housing 301, and the other ends of several mass blocks 303 are respectively provided with a second electromagnet structure 304. The permanent magnet 305 is arranged on the inner wall of the mass block housing 301 and is arranged opposite to several second electromagnet structures 304.

[0050] The mass rod 302 penetrates laterally through the mass block housing 301 and the mass body housing 300 and is then installed on the equipment structure plate 1, which can be used to limit the movement direction of the mass block housing 301 and the mass body housing 300 within the equipment structure plate 1, so that the top surface and the bottom surface of the mass body housing 300 generate lateral movement relative to the top surface and the bottom surface of the inner wall of the composite electromagnetic damping plate, and the mass block housing 301 generates lateral movement within the mass body housing 300.

[0051] Preferably, the mass rod 302 is a rod-shaped structure made of a non-metallic material to avoid interfering with the magnetic field of the second electromagnet structure 304. After the second electromagnet structure 304 is energized, it can adsorb the permanent magnet 305. By adsorbing the permanent magnet 305 with different numbers and at different positions of the second electromagnet structure 304, a mass block structure with different working masses can be formed to provide different damping forces.

[0052] The described second electromagnet structure 304 includes several second electromagnets 3041 arranged in an array on the mass block 303 and a second coil 3042 connecting several second electromagnets 3041. The second coil 304 is electrically connected to the numerical control power supply 6, so that several second electromagnets 3041 can correspondingly adsorb several permanent magnets 305.

[0053] After the second electromagnet 3041 is energized, a certain electromagnetic eddy current is formed, which can make the mass block 303 break away from the mass rod 301 and make the permanent magnet 305 adsorb on the second electromagnet 3041. Thus, the numerical control power supply 6 can input current to different positions and different numbers of second electromagnets 3041 to adsorb the corresponding positions and corresponding numbers of mass blocks 303, and use the corresponding number of mass blocks 303 to provide weight to form a mass block structure with different working masses. The mass block structures with different working masses can provide different damping forces to flexibly adjust the vibration damping force and the resonance frequency of the equipment.

[0054] Preferably, the mass block 303 can be snapped onto the mass rod 302 so that the mass block 303 can be separated from the mass rod 302 when the second electromagnet 3041 attracts the permanent magnet 305, and can be located on the mass rod 302 and disposed opposite to the permanent magnet 305 at the corresponding position when the second electromagnet 3041 does not attract the permanent magnet 305.

[0055] Preferably, each of the permanent magnets 305 includes an S pole and an N pole, and the polarities of adjacent permanent magnets 305 along the length direction of the mass rod 302 are opposite, and the two permanent magnets 305 located at the top and bottom inner walls of the mass block housing 301 are symmetrically arranged.

[0056] The number, polarity, and distribution position of the permanent magnets 305 can be adaptively adjusted according to actual usage requirements.

[0057] A second temperature sensor 306 and a second acceleration sensor 307 are installed on the inner wall of the mass body housing 300, and the second temperature sensor 306 and the second acceleration sensor 307 are electrically connected to the information collector 5.

[0058] The second temperature sensor 306 is used to monitor the working temperature inside the mass body housing 300 in real time to avoid over-temperature danger. The second acceleration sensor 307 is used to monitor the motion state of the mass body housing 300 in real time, including motion acceleration, motion speed, etc., so as to facilitate timely obtaining the motion state of the mass body housing 300 and the vibration damping force it can provide, thereby facilitating the adaptive adjustment of the resonance frequency.

[0059] Preferably, the information collector 5 can be adaptively selected according to the data to be collected and the type of sensor, and is used to collect the data of the first acceleration sensor 101, the displacement sensor 203, the second temperature sensor 306, the second acceleration sensor 307, and the first temperature sensor 403 in real time, and requires short time delay and good synchronization of data output.

[0060] Please refer to Appendix Figure 1 , an electromagnetic eddy current damping method with an adaptively adjustable resonance frequency, comprising the following steps:

[0061] Step 1: Encode a plurality of second electromagnets 3041 and permanent magnets 305 inside the mass body respectively.

[0062] Using the unique encoding facilitates the individual control of the energization of each second electromagnet 3041, including whether to energize, the magnitude of the input current, etc.

[0063] Step 2: Control the numerical control power supply 6 by the controller 7 to input current to the encoded multiple second electromagnets 3041, so that the multiple second electromagnets 3041 have magnetism and attract the permanent magnets 305 at the corresponding positions, so that the multiple mass blocks 303 become a mass body working together.

[0064] The numerical control power supply 6 inputs currents to the second electromagnets 3041 with different quantities and at different positions, for adjusting the adsorption quantity and adsorption position of the second electromagnets 3041 and the permanent magnets 305, so as to adjust the working mass of the mass block structure, and further be able to adjust the damping force and the vibration frequency of the system.

[0065] Step 3: Adjust the compression amount of the servo spring array 202 through the lead screw 201 of the spring adjustable structure 2, so as to adjust the distance between one end of the servo spring array 202 located inside the mass body housing 300 and the mass block structure.

[0066] Through the adjustment of the distance between the servo spring array 202 and the mass block structure, it can be used to limit the moving range of the mass block structure inside the mass body housing 300. By using the rotation adjustment of the lead screw 201, different numbers of springs in the servo spring array 202 can be controlled to compress different lengths, so as to adjust the stiffness of the servo spring array 202 to meet the requirement of flexible adjustability of the stiffness. The servo spring array 202 is a conventional elastic adjustment mechanism in the art, and its specific structure and working principle will not be elaborated here. According to Hooke's law, F = kx, by double-controlling the stiffness and displacement, the magnitude of the elastic force can be controlled.

[0067] When a set of spring adjustable structures 2 and all the mass blocks 303 work, the frequency of the device is the lowest, which is f L ; when all the spring adjustable structures 2 work without the mass blocks 303, the frequency of the device is the highest, which is f H ; through the adjustment of the working quantities of different spring adjustable structures 2 and the mass blocks 303, the flexible adjustment of the frequency f of the device can be realized, and the adjustment range is f L <f<f H .

[0068] Step 4: When the device structure board 1 and the mass body and the first electromagnet structure 4 inside it are affected by an external force F and move, the data of the first acceleration sensor 101, the second acceleration sensor 307, the first temperature sensor 403, the second temperature sensor 306, and the displacement sensor 203 are collected in real time through the information collector 5, and the data is transmitted to the controller 7, and the controller 7 processes and analyzes the data.

[0069] Step 5: The controller 7 issues a current adjustment instruction to the numerical control power supply 6 according to the processing and analysis results, so that the numerical control power supply 6 adjusts the input current and the current input position to the second electromagnet 3041 according to the current adjustment instruction, so as to change the working mass of the mass block structure, and further be able to adaptively adjust the vibration frequency of the system in real time.

[0070] Step 6: According to Ampere's circuital law, a change in the input current will cause a change in the magnetic field intensity. According to Faraday's law of electromagnetic induction, the mass body drives the first electromagnet 4 to move within the device structural plate 1, causing the composite electromagnetic damping plate to cut the magnetic induction lines formed by the first electromagnet 4 and generating a corresponding induced electromotive force. The induced electromotive force generates a magnetic field and impedes the movement of the mass body within the device structural plate 1 to adjust the magnitude of the damping force provided by the electromagnetic eddy current damping system. The device vibration frequency is the same as the system vibration frequency, achieving the effect of vibration reduction and the adaptive adjustment of the resonance frequency.

[0071] The above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the invention. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electromagnetic eddy current vibration reduction system with adaptive adjustable resonant frequency, characterized by: The device comprises an equipment structure plate (1), an adjustable spring structure (2), a mass body, a first electromagnet structure (4), an information acquisition instrument (5), a numerical control power supply (6) and a controller (7); the equipment structure plate (1) is a hollow closed box structure; the first electromagnet structure (4) is mounted on the outer wall of the mass body and forms an air gap sliding structure (100) with the inner wall of the equipment structure plate (1), so that the mass body can be movably arranged in the equipment structure plate (1); the adjustable spring structure (2) is arranged between the mass body and the equipment structure plate (1); the first electromagnet structure (4) is electrically connected to the information acquisition instrument (5) and the numerical control power supply (6) located outside the equipment structure plate (1); and the controller (7) located outside the equipment structure plate (1) is electrically connected to the numerical control power supply (6) and the information acquisition instrument (5).

2. The electromagnetic eddy current vibration reduction system with adaptive adjustable resonant frequency according to claim 1 is characterized in that: The equipment structure plate (1) is a composite electromagnetic damping plate; an air gap sliding structure (100) is formed between the inner wall of the composite electromagnetic damping plate and the first electromagnet structure (4); a first acceleration sensor (101) is installed on the outer wall of the composite electromagnetic damping plate; and the first acceleration sensor (101) is electrically connected to an information collector (5).

3. The electromagnetic eddy current vibration reduction system with adaptive adjustable resonant frequency according to claim 1 is characterized in that: The mass body comprises a mass body shell (300) and a mass block structure; the first electromagnet structure (4) is arranged on the top surface and the bottom surface of the mass body shell (300), so that the mass body shell (300) can be movably arranged in the equipment structure plate (1); the mass block structure is adjustably arranged in the mass body shell (300) through the spring adjustable structure (2).

4. The electromagnetic eddy current vibration reduction system with adaptive adjustable resonant frequency according to claim 3 is characterized in that: The first electromagnet structure (4) comprises a plurality of first electromagnets (401) arranged in an array on the outer wall of the mass body housing (300) and a first coil (402) connected to the plurality of first electromagnets (401); the first coil (402) is electrically connected to a numerical control power supply (6); a first temperature sensor (403) is installed on the first coil (402); and the first temperature sensor (403) is electrically connected to an information collector (5).

5. The electromagnetic eddy current vibration reduction system with adaptive adjustable resonant frequency according to claim 3 is characterized in that: The spring adjustable structure (2) comprises a lead screw (201) and a servo spring array (202); the servo spring array (202) is a spring body with variable compression stiffness composed of a plurality of springs of different specifications; one end of the servo spring array (202) is adjustably mounted on the side wall of the equipment structure plate (1) through the lead screw (201); the other end of the servo spring array (202) is embedded in the side wall of the mass body housing (300), so that the mass block structure can contact the other end of the servo spring array (202) after movement; the spring adjustable structures (2) are arranged in pairs and symmetrically on both sides of the mass block structure.

6. The electromagnetic eddy current vibration reduction system with adaptive adjustable resonant frequency according to claim 5 is characterized in that: A displacement sensor (203) is provided between the equipment structure plate (1) and the mass body housing (300), and the displacement sensor (203) is electrically connected to the information collector (5).

7. The electromagnetic eddy current vibration reduction system with adaptive adjustable resonant frequency according to claim 3 or 5, characterized in that: The mass block structure comprises a mass block shell (301), a mass rod (302), a mass block (303), a second electromagnet structure (304) and a permanent magnet (305); two ends of the mass rod (302) respectively penetrate the two side walls of the mass block shell (301) and the two side walls of the mass body shell (300) and are installed on the two side walls of the equipment structure plate (1); one end of a plurality of mass blocks (303) is symmetrically arranged on the mass rod (302) and located in the mass block shell (301); the other ends of the plurality of mass blocks (303) are respectively provided with the second electromagnet structure (304); the permanent magnet (305) is arranged on the inner wall of the mass block shell (301) and is arranged opposite to the plurality of second electromagnet structures (304).

8. The electromagnetic eddy current vibration reduction system with adaptive adjustable resonant frequency according to claim 7 is characterized in that: The second electromagnet structure (304) comprises a plurality of second electromagnets (3041) arranged in an array on a mass block (303) and a second coil (3042) connected to the plurality of second electromagnets (3041); the second coil (3042) is electrically connected to a digital control power supply (6), so that the plurality of second electromagnets (3041) can correspondingly adsorb a plurality of permanent magnets (305).

9. The electromagnetic eddy current vibration reduction system with adaptive adjustable resonant frequency according to claim 3 is characterized in that: A second temperature sensor (306) and a second acceleration sensor (307) are installed on the inner wall of the mass body housing (300), and the second temperature sensor (306) and the second acceleration sensor (307) are electrically connected to the information collector (5).

10. An electromagnetic eddy current vibration reduction method with adaptive adjustable resonant frequency as claimed in claim 9, characterized in that: The following steps are involved: Step 1: respectively encode a plurality of second electromagnets (3041) and permanent magnets (305) in the mass body; Step 2: Controlling the digital control power supply (6) through the controller (7) to input current into the plurality of encoded second electromagnets (3041), so that the plurality of second electromagnets (3041) have magnetism and attract the permanent magnets (305) at corresponding positions, thereby making the plurality of mass blocks (303) become a mass body working together; Step 3: adjusting the compression amount of the servo spring array (202) by means of the lead screw (201) of the spring adjustable structure (2), thereby adjusting the distance between one end of the servo spring array (202) located in the mass body housing (300) and the mass block structure; When a set of spring adjustable structures (2) and all the mass blocks (303) are working, the frequency of the device is the lowest, which is f L When all the spring adjustable structures (2) and the massless block (303) are working, the frequency of the device is the maximum, which is f H The frequency f of the device can be flexibly adjusted by adjusting the working quantity of different spring adjustable structures (2) and mass blocks (303), and the adjustment range is f L <f<f H ; Step 4: When subjected to the external force F, the equipment structure plate (1) and the mass body inside it and the first electromagnet structure (4) move, and the data of the first acceleration sensor (101), the second acceleration sensor (307), the first temperature sensor (403), the second temperature sensor (306), and the displacement sensor (203) are collected in real time by the information collector (5), and the data are transmitted to the controller (7), and the controller (7) processes and analyzes the data; Step 5: The controller (7) sends a current adjustment instruction to the digital control power supply (6) according to the processing and analysis results, so that the digital control power supply (6) adjusts the input current and the current input position to the second electromagnet (3041) according to the current adjustment instruction; Step 6: The mass body drives the first electromagnet (4) to move in the equipment structure plate (1), so that the composite electromagnetic damping plate cuts the magnetic flux lines formed by the first electromagnet (4) and generates a corresponding induced electromotive force. The induced electromotive force generates a magnetic field and hinders the movement of the mass body in the equipment structure plate (1), so as to adjust the damping force provided by the electromagnetic eddy current vibration reduction system, thereby achieving the vibration reduction effect and adaptive adjustment of the resonant frequency.

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