Electromagnetic damper

Abstract

The utility model discloses an electromagnetic damper which comprises a sleeve, a top cover is arranged on the upper portion of the sleeve, a base is arranged at the bottom of the sleeve, a through hole is formed in the center of the top cover, a linear bearing is arranged in the through hole, a center shaft penetrates through the linear bearing and goes deep into the sleeve, and a suspension permanent magnet is arranged at the end, located in the sleeve, of the center shaft. Fixed permanent magnets with the same parameters are fixedly installed on the upper side and the lower side in the sleeve respectively, and when the suspension permanent magnet is located in the middle of the fixed permanent magnets on the upper side and the lower side in the sleeve, magnetic attraction force / repulsive force F1 is generated between the suspension permanent magnet and the fixed permanent magnet located on the upper side in the sleeve. Magnetic attraction force / repulsive force F2 is generated between the suspension permanent magnet and the fixed permanent magnet located on the lower side of the interior of the sleeve, and F1 is equal to F2. According to the utility model, the service life of the device is prolonged, the maintenance cost is reduced, and the efficiency and reliability of vibration control are obviously improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering equipment, and specifically relates to an electromagnetic damper. Background Art

[0002] In engineering and mechanical systems, the importance of vibration control is self-evident. Vibration not only affects the performance and life of equipment, but can also cause noise pollution and user discomfort. However, existing vibration control solutions often have many shortcomings.

[0003] Traditional damping systems, such as springs and dampers, mainly rely on passive methods to achieve vibration control. Although these systems can alleviate vibration to a certain extent, their control effect and adjustment range are greatly limited, and they cannot adapt to complex and changing vibration environments. In addition, traditional damping systems usually require manual intervention or preset parameters, and lack the ability of real-time adjustment and adaptive control, which greatly limits the breadth and flexibility of their application.

[0004] Although existing electromagnetic dampers on the market try to actively control vibration through electromagnetic force, most of them are still passive designs, with problems such as slow response speed and insufficient dynamic adjustment ability. When the vibration changes rapidly, such electromagnetic dampers often cannot respond in time and make effective adjustments, thus affecting the effect of vibration control. Utility Model Content

[0005] In order to solve the problems of slow response speed and insufficient dynamic adjustment ability of existing electromagnetic dampers, the utility model proposes an electromagnetic damper, which adopts a unique magnetic suspension design to achieve a non-contact, mechanical friction and wear-free operation mode. This design not only prolongs the service life of the device and reduces maintenance costs, but also significantly improves the efficiency and reliability of vibration control.

[0006] In order to achieve the above objectives, the utility model adopts the following technical solutions:

[0007] The utility model discloses an electromagnetic damper, comprising a sleeve, wherein a top cover is provided on the upper part of the sleeve, a base is provided on the bottom part, a through hole is provided at the center position of the top cover, a linear bearing is provided inside the through hole, a central axis passes through the linear bearing and extends deep into the sleeve, a suspended permanent magnet is provided at one end of the central axis located inside the sleeve, fixed permanent magnets with the same parameters are fixedly installed on the upper and lower sides of the sleeve respectively, and when the suspended permanent magnet is located in the middle position of the fixed permanent magnets on the upper and lower sides of the sleeve, a magnetic attraction / repulsion force F1 is generated between the suspended permanent magnet and the fixed permanent magnet located on the upper side of the sleeve, and a magnetic attraction / repulsion force F2 is generated between the suspended permanent magnet and the fixed permanent magnet located on the lower side of the sleeve, and F1=F2.

[0008] Furthermore, a vibration sensor is arranged on the central axis, and electromagnets are respectively arranged in the middle of the fixed permanent magnets on the upper and lower sides inside the sleeve, the electromagnets are connected to the controller through a power amplifier, the vibration sensor is connected to a signal collector, the signal collector and the power amplifier are both connected to the controller, and the controller is also connected to an operator.

[0009] Furthermore, steps are processed on the upper and lower sides of the sleeve for fixing the fixed permanent magnets on the upper and lower sides of the sleeve. Beneficial Effects

[0010] 1. The utility model has the characteristics of simple structure and convenient operation. Its unique magnetic suspension design realizes a non-contact operation mode without mechanical friction and wear, so no lubrication is required. This design not only prolongs the service life of the device and reduces maintenance costs, but also significantly improves the efficiency and reliability of vibration control, effectively saves energy, reduces production costs, and demonstrates excellent economy and reliability. In addition, the device is small in size and has few consumables, which is particularly suitable for application scenarios with limited space.

[0011] 2. The utility model also adds a set of electromagnetic components, which can be turned on as needed to adjust the vibration reduction parameters according to the vibration data measured by the vibration sensor, thereby achieving real-time adjustment. These advantages give the device significant advantages and potential in the field of vibration control. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is an exploded view of the mechanical part of the utility model.

[0014] In the figure: 1. Top cover; 2. Sleeve; 3. Base; 4. Fixed permanent magnet; 5. Electromagnet; 6. Vibration sensor; 7. Suspended permanent magnet; 8. Linear bearing; 9. Middle axis; 10. Power amplifier; 11. Controller; 12. Signal collector; 13. Arithmetic unit. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0016] Embodiment 1:

[0017] Reference Figure 1-Figure 2An electromagnetic damper of the present embodiment includes a sleeve 2, a top cover 1 is provided on the upper part of the sleeve 2, a base 3 is provided on the bottom part, a through hole is provided at the center position of the top cover 1, a linear bearing 8 is provided inside the through hole, a central axis 9 passes through the linear bearing 8 and extends into the interior of the sleeve 2, a suspended permanent magnet 7 is provided at one end of the central axis 9 located inside the sleeve 2, fixed permanent magnets 4 with the same parameters are fixedly installed on the upper and lower sides of the sleeve 2 respectively, and when the suspended permanent magnet 7 is located in the middle position of the fixed permanent magnet 4 on the upper and lower sides of the sleeve 2, a magnetic attraction / repulsion force F1 is generated between the suspended permanent magnet 7 and the fixed permanent magnet 4 located on the upper side of the sleeve 2, and a magnetic attraction / repulsion force F2 is generated between the suspended permanent magnet 7 and the fixed permanent magnet 4 located on the lower side of the sleeve 2, and F1=F2. By adopting the above scheme, the working process of an electromagnetic damper of this embodiment is as follows: one end of the central axis 9 outside the sleeve is used to connect the external shock-absorbing equipment. When there is no vibration, the suspended permanent magnet is subjected to equal magnetic attraction / repulsion force generated by the fixed permanent magnets 4 at the upper and lower ends, so that the suspended permanent magnet is in the middle position. When there is external vibration, the central axis drives the suspended permanent magnet to move up / down, so that the suspended permanent magnet 7 is subjected to unequal magnetic attraction / repulsion force generated by the fixed permanent magnets 4 at the upper and lower ends, and resets under the action of the magnetic field force, thereby reducing the vibration intensity. This embodiment has the characteristics of simple structure and convenient operation. Its unique magnetic suspension design realizes a non-contact operation mode without mechanical friction and wear, so that no lubrication is required, which significantly extends the service life, effectively saves energy, reduces production costs, and shows excellent economy and reliability.

[0018] Embodiment 2:

[0019] The difference between this embodiment and the embodiment 1 is that a vibration sensor is provided on the central axis 9, and electromagnets 5 are provided in the middle of the fixed permanent magnets 4 on the upper and lower sides of the sleeve 2, respectively. The electromagnets 5 are connected to the controller 11 through the power amplifier 10, and the vibration sensor 6 is connected to the signal collector 12. The signal collector 12 and the power amplifier 10 are both connected to the controller 11, and the controller 11 is also connected to the computing unit 13. The vibration sensor 6 is fixedly connected to the central axis 9 and is used to detect the vibration displacement and acceleration generated by the central axis 9. The electromagnet assembly 5 is used to output electromagnetic force according to the vibration displacement and acceleration measured by the vibration sensor 6, so as to effectively suppress the vibration of the floating permanent magnet 7 and keep it in its original position. The top of the central axis 9 is connected to the object that needs to be damped. When the vibrating object vibrates, the central axis is driven to vibrate up and down, and the vibration sensor obtains the vibration signal, which is fed back to the electromagnet by the control system. The coil generates a control current that changes with the vibration frequency and vibration conditions, generates a magnetic field, and the force vibration of the permanent magnet is weakened, thereby achieving the purpose of controlling the vibration. The controller controls the operation of the signal collector, the operator and the power amplifier. The signal collector obtains the voltage signal and transmits the voltage signal to the operator. The operator calculates the voltage signal under the control strategy and inputs the processed voltage signal to the power amplifier. The power amplifier outputs current to the electromagnet assembly 6 under the action of the processed voltage signal to generate magnetic force. The control strategy is determined according to the common knowledge of those skilled in the art and the actual shock absorption requirements. The signal collector, the operator and the power amplifier can all use relevant components commonly available on the market.

[0020] Embodiment 3:

[0021] The difference between this embodiment and embodiment 1 or embodiment 2 is that the sleeve 2 is processed with steps on the upper and lower sides for fixing the fixed permanent magnets 4 on the upper and lower sides of the sleeve. The fixed permanent magnets 4 are fixed on the steps in the sleeve and pressed by the base and the top cover, which is simple to connect and has a more stable and reliable structure.

[0022] It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. All components not specified in this embodiment can be implemented using existing technologies.

Claims

1. An electromagnetic damper, comprising a sleeve (2), wherein the sleeve (2) is provided with a top cover (1) on the upper part and a base (3) on the bottom, characterized in that: A through hole is provided at the center of the top cover (1), a linear bearing (8) is provided in the through hole, a central axis (9) passes through the linear bearing (8) and penetrates into the interior of the sleeve (2), a suspended permanent magnet (7) is provided at one end of the central axis (9) located inside the sleeve (2), fixed permanent magnets (4) with the same parameters are respectively fixedly installed on the upper and lower sides of the sleeve (2), and when the suspended permanent magnet (7) is located in the middle of the fixed permanent magnets (4) on the upper and lower sides of the sleeve (2), a magnetic attraction / repulsion force F1 is generated between the suspended permanent magnet (7) and the fixed permanent magnet (4) located on the upper side of the sleeve (2), and a magnetic attraction / repulsion force F2 is generated between the suspended permanent magnet (7) and the fixed permanent magnet (4) located on the lower side of the sleeve (2), and F1=F2.

2. The electromagnetic damper according to claim 1, characterized in that: A vibration sensor is provided on the central axis (9), and electromagnets (5) are provided in the middle of the fixed permanent magnets (4) on the upper and lower sides of the sleeve (2), respectively. The electromagnets (5) are connected to a controller (11) via a power amplifier (10), the vibration sensor (6) is connected to a signal collector (12), the signal collector (12) and the power amplifier (10) are both connected to the controller (11), and the controller (11) is also connected to a computing unit (13).

3. The electromagnetic damper according to claim 1, characterized in that: The sleeve (2) is provided with steps on the upper and lower sides thereof for fixing the fixed permanent magnets (4) on the upper and lower sides thereof.

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