Plate type damper device based on eddy current and friction mixed energy consumption and vibration reduction method of plate type damper device

Abstract

The invention provides a plate-type damper device based on eddy current and friction mixed energy consumption and a vibration reduction method thereof.The plate-type damper device comprises two layers of magnetic conductive cover plates which are arranged in parallel, a permanent magnet array is arranged on the magnetic conductive cover plates and comprises a plurality of permanent magnets, and a magnetic conductive sliding plate is slidably connected between the two layers of magnetic conductive cover plates; conductor friction plates are fixedly connected to the surfaces of the two opposite sides of the magnetic conductive sliding plate and the two layers of magnetic conductive cover plates respectively, magnetic poles of the permanent magnet arrays of the two magnetic conductive cover plates attract each other so as to provide positive pressure for the magnetic conductive sliding plate and the conductor friction plates, friction energy consumption and eddy current energy consumption are combined, and meanwhile the permanent magnet arrays provide the positive pressure to increase friction force. The overall energy consumption efficiency is improved, the problem of positive pressure attenuation caused by bolt pretightening force relaxation is solved, and long-term reliable work of the damper is ensured.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction technology for civil engineering structures, and in particular to a plate damper device and its vibration reduction method based on a combination of eddy current and frictional energy dissipation. Background Technology

[0002] Earthquakes and windstorms are two of the most significant natural disasters threatening human life and property. Structural vibration control technology can suppress or reduce the dynamic response of civil engineering structures under earthquakes, strong winds, and other excitation sources. Based on whether there is external energy input, structural vibration control technology can be divided into passive control, active control, semi-active control, and hybrid control. Passive control requires no external energy input and is widely used due to its good stability. One of the core technologies of passive control lies in developing damping devices with high reliability and durability. Friction dampers are a typical passive energy dissipation device, mainly relying on bolt preload to provide positive pressure, converting structural kinetic energy into heat energy through friction. However, their performance is heavily dependent on the positive pressure between their contact surfaces. Over long-term use, vibration can cause bolt loosening, leading to insufficient positive pressure attenuation, unstable energy dissipation capacity, and low vibration reduction sensitivity, thus affecting the vibration reduction effect and the practical application and promotion of dampers. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a plate damper device based on a combination of eddy current and frictional energy dissipation, which can solve the problems of unstable energy dissipation performance and low efficiency caused by the attenuation of normal pressure in traditional friction dampers.

[0004] Therefore, the present invention adopts the following technical solution: A plate damper device based on a hybrid energy dissipation mechanism of eddy currents and friction includes two parallel magnetically conductive cover plates. Each magnetically conductive cover plate is equipped with a permanent magnet array, which comprises a plurality of permanent magnets. A magnetically conductive sliding plate is slidably connected between the two magnetically conductive cover plates. Conductive friction plates are fixedly connected to the opposite side surfaces of the magnetically conductive sliding plate and the two magnetically conductive cover plates, respectively. The magnetic poles of the permanent magnet arrays on the two magnetically conductive cover plates attract each other, thereby providing positive pressure to the magnetically conductive sliding plate and the conductor friction plates.

[0005] Based on the above technical solutions, the present invention may also employ the following further technical solutions, or combine these further technical solutions: The two permanent magnets located on the upper and lower magnetic cover plates that face each other are magnetized in the same direction, while the adjacent permanent magnets located on the same magnetic cover plate are magnetized in opposite directions.

[0006] The surface of the magnetic cover plate has a groove for embedding the permanent magnet.

[0007] The magnetic cover plate, the conductor friction plate, and the magnetic sliding plate are connected by bolts. The magnetic sliding plate and the conductor friction plate are provided with elongated oval grooves, and the bolts can slide within the elongated oval grooves.

[0008] A spring washer assembly is fitted between the bolt and the magnetic cover plate.

[0009] The conductor friction plate is made of brass.

[0010] The magnetic cover plate and the magnetic sliding plate are made of steel.

[0011] The ends of the magnetic cover plate and the magnetic sliding plate are respectively provided with connection holes for connecting to external structures.

[0012] This invention also provides a vibration reduction method for a plate damper device based on a combination of eddy current and frictional energy dissipation, comprising the following steps: Step 1: Install the plate damper device into the engineering structure through the connection holes on the magnetic cover plate and the magnetic sliding plate; Step 2: When the engineering structure vibrates, the driving magnetic sliding plate and conductor friction plate move relative to the magnetic cover plate, and the following energy dissipation processes occur simultaneously: a. The sliding friction between the magnetic cover plate and the conductor friction plate generates frictional damping force; b. The moving conductor friction plate cuts the magnetic field lines generated by the permanent magnet array, generating eddy current damping force; at the same time, the permanent magnet arrays on the two layers of magnetic cover plate generate relative magnetic attraction force to provide additional positive pressure for the friction between the magnetic cover plate and the conductor friction plate, so that the total damping force is greater than the superposition of the eddy current damping force and the frictional damping force.

[0013] Total damping force ,in This is the eddy current damping coefficient. The relative velocity between the magnetically conductive cover plate and the magnetically conductive sliding plate. The coefficient of friction between the conductor friction plate and the magnetic cover plate. The positive pressure provided to the bolt, This generates a relative magnetic attraction force on the permanent magnet array on the two layers of magnetically conductive cover plates.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: combining friction energy dissipation and eddy current energy dissipation, while the permanent magnet array provides positive pressure to increase friction, thereby improving the overall energy dissipation efficiency, solving the problem of positive pressure attenuation caused by bolt preload relaxation, and ensuring the long-term reliable operation of the damper. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a top view of the present invention.

[0017] Figure 3 This is a front view of the present invention.

[0018] Figure 4 For the present invention Figure 2 Cross-sectional view along the AA direction.

[0019] Figure 5 For the present invention Figure 2 Cross-sectional view along the BB direction.

[0020] Figure 6 For the present invention Figure 3 Cross-sectional view along the CC direction.

[0021] Figure 7 For the present invention Figure 4 Enlarged schematic diagram of point I in the middle. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of the present invention, preferred embodiments of the present invention are described below in conjunction with specific examples. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote elements with the same or similar functions throughout. However, it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the present invention. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present invention.

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0024] The plate damper device based on a hybrid energy dissipation of eddy current and friction provided by the present invention includes two parallel magnetically conductive cover plates 3. The magnetically conductive cover plates 3 are provided with a permanent magnet array, which includes a plurality of permanent magnets 1. A magnetically conductive slide plate 4 is slidably connected between the two magnetically conductive cover plates 3. Conductor friction plates 5 are fixedly connected to the two opposite sides of the magnetically conductive slide plate 4 and the two magnetically conductive cover plates 3, respectively. The magnetic poles of the permanent magnet arrays of the two magnetically conductive cover plates 3 attract each other, thereby providing positive pressure to the magnetically conductive slide plate 4 and the conductor friction plates.

[0025] The two permanent magnets 1 located on the upper and lower magnetic cover plates 3 are magnetized in the same direction, while the adjacent permanent magnets 1 located on the same magnetic cover plate 3 are magnetized in opposite directions, thereby providing a greater magnetic field density.

[0026] The surface of the magnetic cover plate 3 has a groove for embedding the permanent magnet 1, which makes the permanent magnet between the upper and lower magnetic cover plates 3 closer, the attraction is stronger, and the positive pressure provided for friction energy dissipation is greater.

[0027] The magnetic cover plate 3, the conductor friction plate 5, and the magnetic slide plate 4 are connected by bolts 2. The magnetic slide plate 4 and the conductor friction plate 5 are provided with elongated oval grooves 7, and the bolts 2 can slide in the elongated oval grooves 7.

[0028] Bolt 2 is a high-strength bolt.

[0029] A spring washer assembly 6 is fitted between bolt 2 and magnetic cover plate 3.

[0030] like Figure 7 As shown in this embodiment, the surface of the spring washer assembly 6 has inclined tooth patterns, which can effectively prevent the bolt 2 from loosening. The washer assembly itself has strong deformation capacity and good buffering and shock absorption capacity, which can effectively reduce the loss of fastening force of high-strength bolts.

[0031] The conductor friction plate 5 is made of brass.

[0032] When the brass conductor friction plate 5 moves as a conductor plate, it cuts the magnetic field lines, causing the magnetic flux in the conductor plate to change, generating an induced current, and automatically forming eddy currents in the plate. The magnetic field of the eddy current interacts with the original magnetic field, generating a force that opposes the movement of the conductor plate, namely the eddy current damping force, which plays a role in energy dissipation and vibration reduction.

[0033] The magnetic cover plate 3 and the magnetic slide plate 4 are made of steel. As magnetic plates, they serve as magnetic materials, which can effectively prevent magnetic leakage in the magnetic circuit. This not only improves the efficiency of eddy current damping, but also avoids the impact on various surrounding components.

[0034] The ends of the magnetic cover plate 3 and the magnetic slide plate 4 are respectively provided with connection holes for connecting to external structures.

[0035] When designing this invention, the following should be noted: the width of the oblong groove 7 should not be too wide, otherwise the bolt tightening force will be lost; the teeth of the spring washer group 6 should have a certain inclination when being machined; the permanent magnets 1 should be arranged in an alternating manner to generate electromagnetic attraction and magnetic field lines; the thickness of the magnetic guide cover plate 3, the conductor friction plate 5, and the magnetic guide slide plate 4 should not be too small, otherwise the effective damping coefficient will be affected.

[0036] The vibration reduction method for a plate damper device based on a hybrid energy dissipation of eddy currents and friction provided by the present invention includes the following steps: Step 1: Install the plate damper device into the engineering structure through the connection holes on the magnetic cover plate 3 and the magnetic sliding plate 4; Step 2: When the engineering structure vibrates, the magnetically conductive sliding plate 4 and the conductor friction plate 5 move relative to the magnetically conductive cover plate 3, and the following energy-consuming processes occur simultaneously: a. The sliding friction between the magnetically conductive cover plate 3 and the conductor friction plate 5 generates frictional damping force; b. The moving conductor friction plate 5 cuts the magnetic field lines generated by the permanent magnet array, generating eddy current damping force; at the same time, the permanent magnet arrays on the two layers of magnetically conductive cover plates 3 generate relative magnetic attraction force to provide additional positive pressure for the friction between the magnetically conductive cover plate 3 and the conductor friction plate 5, so that the total damping force is greater than the sum of the eddy current damping force and the frictional damping force.

[0037] Total damping force ,in This is the eddy current damping coefficient. The relative velocity between the magnetic cover plate 3 and the magnetic sliding plate 4. The coefficient of friction between the conductor friction plate 5 and the magnetic cover plate 3. The positive pressure provided to the bolt, The permanent magnet array on the two layers of magnetic cover plate 3 generates a relative magnetic attraction force.

[0038] This invention uses permanent magnets to provide a continuous magnetic field source, eliminating the need for external energy sources and producing a long-term, stable vibration reduction effect.

[0039] Based on the description and accompanying drawings of this invention, those skilled in the art can readily manufacture or use the plate damper device and vibration reduction method based on the hybrid energy dissipation of electric eddy currents and friction of this invention, and can achieve the positive effects described in this invention.

[0040] It should be noted that the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "installed," "set," "equipped with," "connected," "linked," and "sleeve" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral construction; 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, or an internal connection between two mechanisms, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] In the description of this invention, it should be understood that the terms "one end," "the other end," "outer side," "inner side," "horizontal," "end," "length," "outer end," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the mechanism or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. The terms "first" and "second" are also used only for the sake of brevity in description and do not indicate or imply relative importance.

[0042] Furthermore, in practicing the claims of this invention, those skilled in the art can understand and influence variations to the disclosed embodiments through a study of the drawings, the disclosure, and the appended claims. Additionally, in the claims and description, words such as "comprising" and "containing" do not exclude other elements or steps, and non-plural nouns do not exclude their plural forms.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes and modifications made in accordance with the present invention are covered by the scope of the claims of the present invention, and will not be listed here.

Claims

1. A plate damper device based on a hybrid energy dissipation method of eddy currents and friction, characterized in that, The device includes two parallel magnetic cover plates (3), each with a permanent magnet array, which includes several permanent magnets (1). A magnetic sliding plate (4) is slidably connected between the two magnetic cover plates (3). Conductor friction plates (5) are fixedly connected to the two sides of the magnetic sliding plate (4) opposite to the two magnetic cover plates (3). The magnetic poles of the permanent magnet arrays of the two magnetic cover plates (3) attract each other, thereby providing positive pressure to the magnetic sliding plate (4) and the conductor friction plate (5).

2. The plate damper device based on a hybrid energy dissipation of eddy currents and friction as described in claim 1, characterized in that, The two permanent magnets (1) located on the upper and lower magnetic cover plates (3) facing each other have the same magnetization direction, while the adjacent permanent magnets (1) located on the same magnetic cover plate (3) have opposite magnetization directions.

3. The plate damper device based on a hybrid energy dissipation of eddy currents and friction as described in claim 1, characterized in that, The surface of the magnetic cover plate (3) is provided with a groove for embedding the permanent magnet (1).

4. The plate damper device based on a hybrid energy dissipation of eddy currents and friction as described in claim 1, characterized in that, The magnetic cover plate (3), the conductor friction plate (5), and the magnetic sliding plate (4) are connected by bolts (2). The magnetic sliding plate (4) and the conductor friction plate (5) are provided with elongated oval grooves (7), and the bolts (2) can slide in the elongated oval grooves (7).

5. The plate damper device based on a hybrid energy dissipation of eddy currents and friction as described in claim 4, characterized in that, A spring washer assembly (6) is fitted between the bolt (2) and the magnetic cover plate (3).

6. The plate damper device based on a hybrid energy dissipation of eddy currents and friction as described in claim 1, characterized in that, The conductor friction plate (5) is made of brass.

7. The plate damper device based on a hybrid energy dissipation of eddy currents and friction as described in claim 1, characterized in that, The magnetic cover plate (3) and the magnetic sliding plate (4) are made of steel.

8. The plate damper device based on a hybrid energy dissipation of eddy currents and friction as described in claim 1, characterized in that, The ends of the magnetic cover plate (3) and the magnetic sliding plate (4) are respectively provided with connection holes for connecting external structures.

9. A vibration reduction method for a plate damper device based on a combination of eddy current and frictional energy dissipation, characterized in that, Includes the following steps: Step 1: Install the plate damper device into the engineering structure through the connection holes on the magnetic cover plate (3) and the magnetic sliding plate (4); Step 2: When the engineering structure vibrates, the magnetic sliding plate (4) and the conductor friction plate (5) are driven to move relative to the magnetic cover plate (3), and the following energy-consuming processes occur simultaneously: a. The sliding friction between the magnetic cover plate (3) and the conductor friction plate (5) generates frictional damping force; b. The moving conductor friction plate (5) cuts the magnetic field lines generated by the permanent magnet array, generating eddy current damping force; at the same time, the permanent magnet array on the two layers of magnetic cover plate (3) generates relative magnetic attraction force to provide additional positive pressure for the friction between the magnetic cover plate (3) and the conductor friction plate (5), so that the total damping force is greater than the superposition of the eddy current damping force and the frictional damping force.

10. The vibration reduction method of the plate damper device based on a hybrid energy dissipation of eddy currents and friction as described in claim 9, characterized in that, Total damping force ,in This is the eddy current damping coefficient. The relative velocity between the magnetic cover plate (3) and the magnetic sliding plate (4) is... The coefficient of friction between the conductor friction plate (5) and the magnetic cover plate (3) is given. The positive pressure provided to the bolt, The permanent magnet array on the two layers of magnetic cover plate (3) generates a relative magnetic attraction force.

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