Damping amplification type damping device and damping method

Abstract

The invention provides a damping amplification type damping device and a damping method. The damping amplification type damping device comprises one or more dampers, and each damper comprises a connecting mechanism, a supporting mechanism and a damping mechanism. The connecting mechanism comprises a first connecting shaft and a connecting rod, and the first connecting shaft is rotationally connected with the connecting rod and used for being rotationally connected with a stress component. The supporting mechanism comprises a supporting seat and a supporting shaft, and the supporting shaft is rotationally connected with the supporting seat and rotationally connected with the connecting rod; the damping mechanism comprises a damping unit, and the damping unit is connected with the connecting rod and used for applying damping to the connecting rod. When the stress component vibrates, the connecting rod drives the damping unit to vibrate with the supporting shaft as a fulcrum, and therefore damping is adjusted under the condition that the damping unit is not changed.

Description

Technical Field

[0001] The present invention relates to the field of damping devices, and in particular to a damping device and a damping method. Background Art

[0002] With the continuous advancement of engineering technology, the demand for seismic isolation control in engineering structures is also increasing. Traditional dampers, such as viscoelastic dampers, have attracted widespread attention from the public due to their low cost, simple structure, and easy maintenance. However, these traditional viscoelastic dampers are passive dampers and cannot change their stiffness and damping characteristics as the structural action changes. Magnetorheological elastomers (MREs), as a smart material, are characterized by controllable stiffness and damping under a magnetic field, so they are widely used in smart variable stiffness dampers. At present, there is a lack of research on high-output MRE dampers, mainly due to the limited range of MRE variable stiffness. To achieve a high-output MRE damper, a sufficiently large shear area is required, which requires matching the corresponding coil. Large-diameter coils will cause energy consumption and heat generation problems. Summary of the invention

[0003] In view of the above, it is necessary to provide a damping amplification type damping device and a damping method, which are intended to improve damping by amplifying the damping vibration amplitude.

[0004] To this end, the present disclosure first provides a damping amplification type damping device, including one or more dampers, wherein the damper includes:

[0005] A connecting mechanism, comprising a first connecting shaft and a connecting rod, wherein the first connecting shaft is rotatably connected to the connecting rod and is used to rotatably connect to a force-bearing member;

[0006] A support mechanism, comprising a support seat and a support shaft, wherein the support shaft is rotatably connected to the support seat and is rotatably connected to the connecting rod;

[0007] A damping mechanism, comprising a damping unit, wherein the damping unit is connected to the connecting rod and is used to apply damping to the connecting rod;

[0008] When the force bearing component vibrates, the damping unit is driven to vibrate through the connecting rod with the supporting shaft as a fulcrum.

[0009] According to the damping amplification type damping device, the distance between the first connecting shaft and the supporting shaft is smaller than the distance between the supporting shaft and the damping unit.

[0010] According to the damping amplification type damping device, the damping unit includes:

[0011] A first magnetic conductive plate and a second magnetic conductive plate are arranged opposite to each other, wherein the first magnetic conductive plate is connected to the connecting rod;

[0012] A magnetorheological elastomer connected between the first magnetic conductive plate and the second magnetic conductive plate;

[0013] The coil is surrounded by the magnetorheological elastomer and is used to adjust the elastic modulus of the magnetorheological elastomer.

[0014] According to the damping amplification type damping device, the damping mechanism further includes a second connecting shaft, the connecting rod is rotatably connected to the second connecting shaft, and the second connecting shaft is connected to the first magnetic conductive plate.

[0015] According to the damping amplification type damping device, the damping units are arranged at both ends of the second connecting shaft in the axial direction, and the two ends of the second connecting shaft are respectively connected to one of the first magnetic conductive plates.

[0016] According to the damping amplification type damping device, it comprises a pair of dampers, wherein the dampers are arranged on both sides of the force bearing member, and the connecting rods of the pair of dampers are rotatably connected to the force bearing member.

[0017] According to the damping amplification type damping device, when the force-bearing component vibrates in the vertical direction, it drives the connecting rod to drive the first magnetic conductive plate to vibrate in the vertical direction with the support shaft as the fulcrum, and the first magnetic conductive plate drives the magnetorheological elastomer to vibrate in the shear direction.

[0018] The present disclosure also provides a damping amplification type damping method, which is applicable to the damping amplification type damping device, and the damping method comprises:

[0019] When the load-bearing component vibrates, it drives one end of the connecting rod to swing;

[0020] The connecting rod uses the supporting shaft as a fulcrum to drive the damping unit connected to the other end of the connecting rod to vibrate.

[0021] According to the damping amplification damping method, the distance between the first connecting shaft and the supporting shaft is smaller than the distance between the supporting shaft and the damping unit, and the swing amplitude of the end of the connecting rod close to the force-bearing component is smaller than the swing amplitude of the other end.

[0022] According to the damping amplification damping method, driving the damping unit connected to the other end of the connecting rod to vibrate includes:

[0023] The other end of the connecting rod drives the magnetorheological elastic body in the damping unit to deform, and

[0024] The magnetic field of the coil is adjusted by changing the current value of the coil in the damping unit, thereby adjusting the elastic modulus of the magnetorheological elastomer.

[0025] Compared with the prior art, the above-mentioned damping amplification type damping device and damping method drive the damping unit to vibrate by using the supporting shaft as a fulcrum through a connecting rod. In this way, the force on the damping unit can be adjusted by connecting the position of the supporting shaft, thereby adjusting the damping without changing the damping unit. When the force arm of the damping unit is set to be greater than the force arm of the force-bearing component, the damping unit can also output a larger damping to the force-bearing component with a smaller elastic modulus. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods, the drawings required for use in the description of the implementation methods will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a structural diagram of a damping-amplifying damping device.

[0028] Figure 2 It is a structural diagram of load-bearing components, connecting structures and supporting mechanisms.

[0029] Figure 3 It is a structural diagram of the damping mechanism.

[0030] Figure 4 It is a schematic diagram of the force principle of the damping-amplifying damping device.

[0031] Description of main component symbols:

[0032] 10-force-bearing member; 20-connecting mechanism; 21-connecting rod; 22-first connecting shaft; 30-supporting mechanism; 31-supporting shaft; 32-supporting seat; 40-damping mechanism; 41-second connecting shaft; 42-damping unit; 421-first magnetic conductive plate; 422-second magnetic conductive plate; 423-magnetorheological elastomer; 424-coil.

[0033] The following specific implementations will further illustrate the present disclosure in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned purposes, features and advantages of the present disclosure, the present disclosure is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present disclosure, and the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0036] In each embodiment, for the convenience of description and not to limit the present disclosure, the term "connection" used in the patent specification and claims of the present disclosure is not limited to physical or mechanical connection, but may include electrical connection, whether direct or indirect. "Up", "down", "below", "left", "right", etc. are only used to indicate relative position relationship. When the absolute position of the described object changes, the relative position relationship also changes accordingly.

[0037] Figure 1 It is a schematic diagram of the structure of the damping amplification type damping device. Figure 1 As shown, the damping amplification damping device includes one or more dampers, which are connected to the force-bearing member 10 and are used to apply damping to the force-bearing member 10 when the force-bearing member 10 vibrates, thereby reducing the vibration amplitude of the force-bearing member 10. Specifically, in this embodiment, the force-bearing member 10 is used to connect other components and import the vibration output by other components. As an example, there are two dampers, which are respectively arranged on both sides of the force-bearing member 10, and damping is applied to the force-bearing member 10 to reduce the vibration of the force-bearing member 10. However, those skilled in the art understand that by setting the shape and structure of the force-bearing member 10, one or more dampers can also be set to connect the force-bearing member 10 as needed.

[0038] Specifically, the damping amplification type damping device includes a connecting mechanism 20, a supporting mechanism 30 and a damping mechanism 40. The connecting mechanism 20 is used to connect the load-bearing component 10, the supporting mechanism 30 is used to support the connecting mechanism 20 to form a swing fulcrum, and the damping mechanism 40 is used to apply damping to the connecting mechanism 20 to achieve a vibration reduction effect on the load-bearing component 10.

[0039] Figure 2 is a schematic diagram of the structure of the force-bearing member 10, the connecting structure and the supporting mechanism 30, as shown Figure 2 As shown, as an example, the load-bearing component 10 is generally in an arched structure, with a connecting mechanism 20 rotatably connecting two damping units 42 at the bottom, and a passage provided at the top for connecting other components. It vibrates in the vertical direction under the action of external force, and the damping mechanism 40 is driven to vibrate through the connecting mechanism 20.

[0040] The connecting mechanism 20 includes a first connecting shaft 22 and a connecting rod 21. The first connecting shaft 22 extends in the horizontal direction, and both ends are rotatably connected to the load-bearing member 10 by means of bearings, rollers, etc. The connecting rod 21 extends generally in the horizontal direction, and one end is rotatably connected to the middle position of the first connecting shaft 22 by means of bearings, etc. In this embodiment, the number of the connecting rod 21 can be one or more, which is set according to factors such as vibration intensity and stiffness.

[0041] The support mechanism 30 is used to form a rotation fulcrum for the rotation of the connecting rod 21. Specifically, the support mechanism 30 includes a support seat 32 and a support shaft 31, and the support shaft 31 is rotatably connected to the support seat 32 and the connecting rod 21. In this embodiment, the support mechanism 30 includes a pair of support columns arranged opposite to each other, and the two ends of the support shaft 31 are rotatably connected to the support seat 32 by bearings or the like, and the middle part is rotatably connected to the connecting rod 21, so that the connecting rod 21 can swing around the support shaft 31. Figure 2 As shown, the distance between the support shaft 31 of the connecting rod 21 and the end portion connected to the first connecting shaft 22 is L1, and the distance between the support shaft 31 and the connection point of the damping unit 42 is L2, then the distance ratio η=L2 / L1. In this embodiment, L1 is set to be smaller than L2, so that the distance ratio η is greater than 1, which can play a role in amplifying damping. The specific implementation principle will be described in detail later.

[0042] Figure 3 Schematic diagram of the structure of the damping mechanism 40. Figure 3 As shown, in this embodiment, the damping mechanism 40 is a magnetorheological elastomer damping mechanism 40, which is used to apply damping to the connecting rod 21. However, in other embodiments, the damping mechanism 40 may also be other types of damping mechanisms 40, such as a friction damping unit, an air damping unit, a hydraulic damping unit, etc. In order to facilitate the adjustment of the damping of the damping unit 42, the damping unit 42 is preferably a magnetorheological damping unit.

[0043] In this embodiment, the damping mechanism 40 includes a second connecting shaft 41 and a pair of damping units 42, and the pair of damping units 42 are respectively connected to the two sides of the connecting rod 21 through the second connecting shaft 41. Specifically, the middle part of the second connecting shaft 41 is rotatably connected to the connecting rod 21, and the damping units 42 are arranged at both ends in the axial direction, so that the two damping units 42 can be driven to output damping at the same time. The damping unit 42 includes a first magnetic conductive plate 421, a second magnetic conductive plate 422, a magnetorheological elastomer 423 (MRE) and a coil 424. The first magnetic conductive plate 421 and the second magnetic conductive plate 422 are both magnetic conductive plates, which are generally flat-plate structures and are arranged relatively parallel. The first magnetic conductive plate 421 is rotatably connected to the connecting rod 21 and can vibrate in the vertical direction following the connecting rod 21. In this embodiment, the two ends of the second connecting shaft 41 are each connected to a first magnetic conductive plate 421. The first magnetic conductive plate 421 and the second magnetic conductive plate 422 are both magnetic conductive plates, which are plates that can guide and concentrate magnetic fields and are usually made of materials with high magnetic permeability, such as silicon steel sheets, Permalloy, ferrite, etc. These materials can make it easier for magnetic lines of force to pass through, reduce magnetic resistance, and thus effectively guide the direction of magnetic field lines, making the magnetic field more concentrated and orderly, and improving the utilization rate of the magnetic field.

[0044] There is a certain gap between the first magnetic conductive plate 421 and the second magnetic conductive plate 422, and a magnetorheological elastomer 423 is provided in the gap, and the magnetorheological elastomer 423 is connected to the first magnetic conductive plate 421 and the second magnetic conductive plate 422. The coil 424 is connected to an external power supply and is arranged near the magnetorheological elastomer 423, for example, around the magnetorheological elastomer 423, and is used to adjust the elastic modulus of the magnetorheological elastomer 423.

[0045] Magnetorheological elastomer 423 is a fluid whose stiffness and damping are controllable under a magnetic field. It is widely used in intelligent variable stiffness damping units. However, the disadvantage is that the stiffness range of magnetorheological elastomer is limited. In order to increase the stiffness variation range, it is necessary to match the corresponding large diameter and large number of turns coil. However, large diameter and large number of turns coil will generate a lot of heat during the adjustment process, causing high energy consumption and overheating problems. However, this application uses a lever to amplify the force arm to achieve the effect of outputting a larger damping within a smaller stiffness adjustment range.

[0046] During operation, when the force-bearing component 10 vibrates in the vertical direction, it drives the connecting rod 21 to drive the first magnetic conductive plate 421 to vibrate in the vertical direction with the support shaft 31 as the fulcrum, and the first magnetic conductive plate 421 moves laterally relative to the second magnetic conductive plate 422 (i.e., the relative distance remains unchanged, and moves along the plane direction of the first magnetic conductive plate 421 and the second magnetic conductive plate 422), driving the magnetorheological elastomer 423 to vibrate in the shear direction, shearing the magnetorheological elastomer 423. With the difference in the elastic modulus of the magnetorheological elastomer 423, the movement resistance between the first magnetic conductive plate 421 and the second magnetic conductive plate 422 is also different, so that the output damping of the damping mechanism 40 can be adjusted by the coil 424.

[0047] Based on the above-mentioned damping amplification type damping device, a damping amplification type damping method is described in detail below. The damping method comprises the following steps:

[0048] S1: The external force drives the force bearing member 10 to vibrate, and when the force bearing member 10 vibrates, it drives one end of the connecting rod 21 to swing. In this step, as an example, the connecting rod 21 swings up and down in the vertical direction, but those skilled in the art understand that according to the different degrees of freedom of rotation of the rod, the connecting rod 21 can also swing in the horizontal direction or other directions.

[0049] S2: The connecting rod 21 uses the supporting shaft 31 as a fulcrum to drive the damping unit 42 connected to the other end of the connecting rod 21 to vibrate. In this step, the distance between the first connecting shaft 22 and the supporting shaft 31 is smaller than the distance between the supporting shaft 31 and the damping unit 42, and the swing amplitude of the end of the connecting rod 21 close to the force-bearing component 10 is smaller than the swing amplitude of the other end.

[0050] During the vibration of the damping unit 42, the other end of the connecting rod 21 drives the magnetorheological elastic body 423 in the damping unit 42 to deform, thereby applying damping to the connecting rod 21. Moreover, by changing the current value of the coil 424 in the damping unit 42 to adjust the magnetic field of the coil 424, the elastic modulus of the magnetorheological elastic body 423 is adjusted, thereby achieving the function of flexibly adjusting the damping output.

[0051] Figure 4 It is a schematic diagram of the force principle of the damping amplification type damping device. Figure 4 As shown, the support shaft 31 serves as the fulcrum for the swing of the connecting rod 21, and the ratio of the distance L1 between the first connecting shaft 22 of the connecting rod 21 and the support shaft 31 to the distance L2 between the connecting point of the supporting shaft 31 of the connecting rod 21 and the damping unit 42 is η:

[0052] η=L2 / L1, in this embodiment, η>1;

[0053] Since the movement between the first magnetic conductive plate 421 and the second magnetic conductive plate 422 is lateral movement, the external force applied to the magnetorheological elastomer 423 is a shear force F 剪 (t).

[0054] At this time, the calculation formula of the shear stiffness K of the magnetorheological elastomer 423 is:

[0055] Where Δx is the shear displacement, F 剪 (t) is the shear force;

[0056] For the existing damping unit, if the shear force is F 剪 (t), then when the shear displacement remains unchanged, the variable range of shear force is [F 剪min (t),F 剪max (t)]. In the embodiment, the lever structure formed by the connecting rod 21 and the support shaft 31 increases the range of shear force to [ηF 剪min (t),ηF 剪max (t)], when the number of damping units 42 is m (m ≥ 1), the shear force variation range becomes [mηF 剪min (t),mηF 剪max (t)], so it can be seen that the damping output effect of the damping amplification type damping device is significant.

[0057] The above-mentioned damping amplification type damping device and damping method drive the damping unit 42 to vibrate with the support shaft 31 as a fulcrum through the connecting rod 21. In this way, the force of the damping unit 42 can be adjusted by connecting the position of the support shaft 31, so that the damping can be adjusted without changing the damping unit 42. When the force arm of the damping unit 42 is set to be greater than the force arm of the load-bearing component 10, the damping unit 42 can also output a larger damping to the load-bearing component 10 with a smaller elastic modulus.

[0058] In the several specific embodiments provided in the present disclosure, it is obvious to those skilled in the art that the present disclosure is not limited to the details of the above exemplary embodiments, and that the present disclosure can be implemented in other specific forms without departing from the spirit or basic features of the present disclosure. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present disclosure is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present disclosure. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

[0059] The above embodiments are only used to illustrate the technical solution of the present disclosure rather than to limit it. Although the present disclosure is described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the technical solution of the present disclosure can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present disclosure.

Claims

1. A damping amplification type damping device, characterized in that: Comprising one or more dampers, the damper comprising: A connecting mechanism, comprising a first connecting shaft and a connecting rod, wherein the first connecting shaft is rotatably connected to the connecting rod and is used to rotatably connect to a force-bearing member; A support mechanism, comprising a support seat and a support shaft, wherein the support shaft is rotatably connected to the support seat and is rotatably connected to the connecting rod; A damping mechanism, comprising a damping unit, wherein the damping unit is connected to the connecting rod and is used to apply damping to the connecting rod; When the force bearing component vibrates, the damping unit is driven to vibrate through the connecting rod with the supporting shaft as a fulcrum.

2. The damping amplification type damping device according to claim 1, characterized in that: A distance between the first connecting shaft and the supporting shaft is smaller than a distance between the supporting shaft and the damping unit.

3. The damping amplification type damping device according to claim 1, characterized in that: The damping unit comprises: A first magnetic conductive plate and a second magnetic conductive plate are arranged opposite to each other, wherein the first magnetic conductive plate is connected to the connecting rod; A magnetorheological elastomer connected between the first magnetic conductive plate and the second magnetic conductive plate; The coil is surrounded by the magnetorheological elastomer and is used to adjust the elastic modulus of the magnetorheological elastomer.

4. The damping amplification type damping device according to claim 3, characterized in that: The damping mechanism further includes a second connecting shaft, the connecting rod is rotatably connected to the second connecting shaft, and the second connecting shaft is connected to the first magnetic conductive plate.

5. The damping amplification type damping device according to claim 4, characterized in that: The damping units are arranged at two ends of the second connecting shaft in the axial direction, and two ends of the second connecting shaft are respectively connected to one of the first magnetic conductive plates.

6. The damping amplification type damping device according to claim 1, characterized in that: It comprises a pair of dampers, which are arranged on both sides of the force-bearing component, and the connecting rods of the pair of dampers are rotatably connected to the force-bearing component.

7. The damping amplification type damping device according to claim 3, characterized in that: When the force-bearing component vibrates in the vertical direction, it drives the connecting rod to drive the first magnetic conductive plate to vibrate in the vertical direction with the support shaft as a fulcrum, and the first magnetic conductive plate drives the magnetorheological elastomer to vibrate in the shear direction.

8. A damping amplification type damping method, characterized in that: Applicable to the damping amplification type damping device according to any one of claims 1 to 7, the damping method comprising: When the load-bearing component vibrates, it drives one end of the connecting rod to swing; The connecting rod uses the supporting shaft as a fulcrum to drive the damping unit connected to the other end of the connecting rod to vibrate.

9. The damping amplification type damping method according to claim 8, characterized in that: The distance between the first connecting shaft and the supporting shaft is smaller than the distance between the supporting shaft and the damping unit, and the swing amplitude of the end of the connecting rod close to the force bearing member is smaller than the swing amplitude of the other end.

10. The damping amplification type damping method according to claim 9, characterized in that: Driving the damping unit connected to the other end of the connecting rod to vibrate includes: The other end of the connecting rod drives the magnetorheological elastic body in the damping unit to deform, and The magnetic field of the coil is adjusted by changing the current value of the coil in the damping unit, thereby adjusting the elastic modulus of the magnetorheological elastomer.

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