Lever-type displacement amplification damper

Abstract

The application relates to the technical field of building structure damping, in particular to a lever type displacement amplification damper, which comprises a displacement amplification rod, one end of the displacement amplification rod is fixed at the beam bottom of a building structure; a supporting rod, one end of the supporting rod is connected with a wall column of the building structure, the other end is hinged with the displacement amplification rod, the hinge of the supporting rod and the displacement amplification rod is a fulcrum, the supporting rod is provided with at least two, each supporting rod is distributed in the form of an eight-character on the two sides of the displacement amplification rod, the distance between the top end of the displacement amplification rod and the fulcrum is smaller than the distance between the bottom end of the displacement amplification rod and the fulcrum; a damping device, the damping device comprises a viscous damper, one end of the viscous damper is hinged with the bottom end of the displacement amplification rod, the other end is fixedly connected with the middle part of the displacement amplification rod. The application realizes amplification of the small displacement of the structure by introducing the mechanical lever principle, and further drives the viscous damper to generate a larger relative movement stroke, so that the response sensitivity and energy consumption capacity of the viscous damper under the small displacement working condition are improved.

Description

Technical Field

[0001] This application relates to the field of building structure vibration reduction technology, and in particular to a lever-type displacement amplification damper. Background Technology

[0002] In the context of the current shift in earthquake resistance and disaster reduction technology from "hard earthquake resistance" to "flexible damping" systems, viscous dampers are widely used in important structures such as high-rise buildings and bridges due to their excellent energy dissipation capacity and stability. However, under low-to-medium intensity earthquakes or wind loads, the inter-story displacement of building structures is often small. The resistance of traditional viscous dampers is closely related to the displacement velocity and stroke of their piston rods. When the input displacement is too small, the damping force cannot be effectively exerted, leading to a significant decrease in damping efficiency. Furthermore, in actual engineering projects, factors such as construction and installation errors and connection gaps further weaken the damper's sensitivity to small deformations, limiting its active protection capability under normal operating conditions. Utility Model Content

[0003] This application aims to at least partially address one of the aforementioned technical problems in the prior art. To this end, embodiments of this application provide a lever-type displacement amplification damper, which exhibits better response sensitivity and energy dissipation capability under small displacement conditions.

[0004] A lever-type displacement amplification damper, comprising: A displacement amplification rod, one end of which is fixed to the bottom of a beam in the building structure; A support rod, one end of which is connected to the wall column of the building structure, and the other end is hinged to the displacement amplifying rod. The hinge point between the support rod and the displacement amplifying rod is the fulcrum. At least two support rods are provided, and each support rod is distributed in a figure-eight shape on both sides of the displacement amplifying rod. The distance between the top end of the displacement amplifying rod and the fulcrum is less than the distance between the bottom end of the displacement amplifying rod and the fulcrum. A damping device, comprising a viscous damper, one end of which is hinged to the bottom end of the displacement amplifying rod, and the other end of which is fixedly connected to the middle of the displacement amplifying rod.

[0005] In an optional or preferred embodiment, two viscous dampers are provided, and the two viscous dampers are distributed on both sides of the displacement amplification rod.

[0006] In an optional or preferred embodiment, the damping device includes a rotating wheel and a friction wheel. The rotating wheel is rotatably connected to the bottom end of the displacement amplifying rod via a rotating shaft. The friction wheel is fixed to the bottom end of the displacement amplifying rod, and the friction wheel and the rotating wheel are in contact with each other.

[0007] In an optional or preferred embodiment, a connecting rod is further included, one end of which is hinged to the rotating shaft, and the other end is fixed at an eccentric position on the rotating wheel.

[0008] In an optional or preferred embodiment, the rotating wheel and the friction wheel are arranged concentrically.

[0009] In an optional or preferred embodiment, a clearance groove is provided at the bottom end of the displacement amplification rod, and the rotating wheel is mounted in the clearance groove via the rotating shaft.

[0010] In an optional or preferred embodiment, both the displacement amplification rod and the support rod are square tube structures.

[0011] In an optional or preferred embodiment, the top end of the displacement amplifying rod is a short arm between the fulcrum and the top end of the displacement amplifying rod, and the bottom end of the displacement amplifying rod is a long arm between the fulcrum and the top end of the rod, with the ratio of the short arm to the long arm being 1:5.

[0012] In an optional or preferred embodiment, the top end of the displacement amplification rod is fixed to the bottom of the beam of the building structure by a first anchor plate.

[0013] In an optional or preferred embodiment, the support rod is fixed to the wall column of the building structure by a second anchor plate.

[0014] Based on the above technical solution, the embodiments of this application have at least the following beneficial effects: When the displacement amplification rod swings, a large relative linear displacement and velocity are generated between the two ends of the viscous damper, thereby stimulating its internal fluid shear effect and achieving efficient energy dissipation. In particular, since the displacement has been amplified by the lever mechanism, even if the top beam itself only produces a millimeter-level displacement, the viscous damper can still obtain a centimeter-level effective working stroke, greatly improving its utilization rate and damping efficiency under small and medium earthquakes. This application achieves effective amplification of small structural displacements by introducing the mechanical lever principle, thereby driving the viscous damper to produce a larger relative motion stroke, significantly improving its response sensitivity and energy dissipation capacity under small displacement conditions. Attached Figure Description

[0015] The present application will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the structure of a lever-type displacement amplification damper according to an embodiment of this application; Figure 2 This is a schematic diagram of the lever-type displacement amplification damper in another embodiment of this application; Figure 3 This is a schematic diagram of the structural relationship between the displacement amplification rod and the damping device in the embodiment shown in Figure 2.

[0016] Figure label: 100-Displacement amplification rod, 110-Short arm, 120-Long arm, 130-Fulcrum, 140-Allowing groove, 200-Support rod, 300-Viscous damper, 410-Rotating wheel, 420-Friction wheel, 430-Connecting rod, 510-First anchor plate, 520-Second anchor plate. Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0023] In the context of the current shift in earthquake resistance and disaster reduction technology from "hard earthquake resistance" to "flexible damping" systems, viscous dampers are widely used in important structures such as high-rise buildings and bridges due to their excellent energy dissipation capacity and stability. However, under low-to-medium intensity earthquakes or wind loads, the inter-story displacement of building structures is often small. The resistance of traditional viscous dampers is closely related to the displacement velocity and stroke of their piston rods. When the input displacement is too small, the damping force cannot be effectively exerted, leading to a significant decrease in damping efficiency. Furthermore, in actual engineering projects, factors such as construction and installation errors and connection gaps further weaken the damper's sensitivity to small deformations, limiting its active protection capability under normal operating conditions.

[0024] This application relates to a lever-type displacement amplification damper for seismic resistance and damping of building structures. It is suitable for applications where inter-story displacement is small under seismic loads of the design level, enhancing the damper's response to minute displacements, thereby improving the overall structure's energy dissipation performance and safety. The technical solution of this application is described in detail below with reference to the accompanying drawings and embodiments. The described content is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application.

[0025] Reference Figure 1The lever-type displacement amplification damper of this application includes: a displacement amplification rod 100, a support rod 200, and a damping device. One end of the displacement amplification rod 100 is fixed to the bottom of a beam in the building structure, serving as the input end of the entire system and directly sensing the relative horizontal displacement of the floor slab. One end of the support rod 200 is connected to a building wall column, and the other end is hinged to the displacement amplification rod 100; this hinge point is the fulcrum 130 of the lever system. At least two support rods 200 are provided, arranged in a "V" shape on both sides of the displacement amplification rod 100, forming a spatially stable support structure. This symmetrical arrangement not only improves the system's resistance to torsional and eccentric loads but also effectively prevents lateral instability or local buckling of the displacement amplification rod 100 during vibration, ensuring a clear and reliable force transmission path.

[0026] The distance from the top of the displacement amplifying rod 100 to the fulcrum 130 is smaller than the distance from its bottom to the fulcrum 130, thus achieving geometric amplification of the input displacement. When the top beam undergoes a small displacement, this displacement is transmitted to the top of the displacement amplifying rod 100 and causes it to rotate around the fulcrum 130. The bottom of the displacement amplifying rod 100 will generate a swing amplitude several times that of the original displacement, thereby significantly amplifying the actual displacement acting on the damping device. This design allows the damping device to obtain a sufficiently large excitation stroke even under low-intensity ground vibrations, fully utilizing its energy dissipation characteristics.

[0027] Furthermore, the damping device includes a viscous damper 300, one end of which is hinged to the bottom end of the displacement amplifying rod 100, and the other end is fixedly connected to the middle of the displacement amplifying rod 100. When the displacement amplifying rod 100 swings, a large relative linear displacement and velocity are generated between the two ends of the viscous damper 300, thereby stimulating its internal fluid shear effect and achieving efficient energy dissipation. Since the displacement has been amplified by the lever mechanism, even if the top beam itself only produces a millimeter-level displacement, the viscous damper 300 can still obtain an effective working stroke in the centimeter range.

[0028] The lever-type displacement amplification damper of this application effectively amplifies small structural displacements by introducing the principle of mechanical levers, thereby driving the viscous damper 300 to generate a larger relative motion stroke, significantly improving its response sensitivity and energy dissipation capacity under small displacement conditions. This device not only enhances the adaptability of the damping system but also strengthens the passive control effect of the overall structure under frequent earthquakes.

[0029] In some embodiments, two viscous dampers 300 are provided, and the two viscous dampers 300 are respectively arranged on both sides of the displacement amplification rod 100. The symmetrical configuration of the dual dampers not only increases the total damping force output, but also enhances the redundancy and reliability of the system. If a single damper fails or is out of service for maintenance, the other side can still continue to function, ensuring structural safety. At the same time, the design of simultaneous operation on both sides also helps to balance the force state of the lever system, avoid additional bending moments or torsional deformations caused by eccentric loading, and improve the stability and durability of the overall mechanical behavior.

[0030] In addition to viscous damping, this application may also employ other forms of damping mechanisms to meet the needs of different application scenarios. (See reference...) Figure 2 , Figure 3 In other embodiments, the damping device includes a rotating wheel 410 and a friction wheel 420. The rotating wheel 410 is rotatably connected to the bottom end of the displacement amplifying rod 100 via a rotating shaft, and the friction wheel 420 is fixed to the bottom end of the displacement amplifying rod 100 and abuts against the rotating wheel 410. When the structure undergoes lateral displacement, the displacement amplifying rod 100 drives the rotating wheel 410 to swing, thereby dissipating energy through the gravitational damping effect. In addition, due to inertia, the rotating wheel 410 will rotate around its rotating shaft during the swinging process. Therefore, the rotating wheel 410 will generate sliding friction with the stationary friction wheel 420, thereby achieving frictional energy dissipation. Thus, the damping device in this embodiment can achieve a dual damping effect of gravitational damping and frictional damping, resulting in a better damping effect.

[0031] To further enhance the controllability and response sensitivity of friction damping, this application also introduces an eccentric transmission mechanism. Specifically, the damping device further includes a connecting rod 430, one end of which is hinged to the rotating wheel 410, and the other end is fixed at an eccentric position on the rotating wheel 410. Thus, during the oscillation of the displacement amplification rod 100, the connecting rod 430 will drive the rotating wheel 410 to rotate itself. This mechanism can induce a higher angular velocity at the same oscillation angle, further enhancing the damping effect.

[0032] To ensure stable contact between the rotating wheel 410 and the friction wheel 420 and reduce stress concentration, a concentric arrangement is preferably adopted, i.e., the rotating wheel 410 and the friction wheel 420 are arranged concentrically. This design ensures that the two always maintain a constant contact radius and pressure distribution, which is beneficial to achieving uniform wear and a stable coefficient of friction, and avoids vibration aggravation or noise problems caused by eccentricity.

[0033] Reference Figure 3 The displacement amplification rod 100 has a relief groove 140 at its bottom end to accommodate the rotating wheel 410 and its shaft assembly. The relief groove 140 provides ample rotation space for the rotating wheel 410.

[0034] In some embodiments, both the displacement amplification rod 100 and the support rod 200 adopt a square tube structure. The square tube has high bending stiffness and torsional stiffness, which can effectively withstand complex alternating loads, and is easy to weld, drill and anchor, making it suitable for industrial mass production and rapid on-site assembly.

[0035] The short arm 110 extends from the top of the displacement amplification rod 100 to the fulcrum 130, while the long arm 120 extends from the bottom of the displacement amplification rod 100 to the fulcrum 130. The length ratio of the short arm 110 to the long arm 120 is 1:5. This ratio has been verified through extensive simulation analysis and experiments, achieving the optimal displacement amplification factor while ensuring structural safety. Theoretically, the displacement amplification factor is equal to the ratio of the long arm to the short arm. Therefore, with this configuration, the input displacement can be amplified five times and applied to the damping device, greatly improving the working efficiency of the viscous damper 300.

[0036] The top of the displacement amplification rod 100 is fixed to the bottom of the beam in the building structure via a first anchor plate 510. The first anchor plate 510 is typically made of high-strength steel and is securely connected to the bottom of the concrete beam using chemical anchors or rebar anchoring, ensuring a direct and reliable force transmission path. This connection node must possess sufficient shear and tensile bearing capacity to withstand cyclic loads under seismic action. The support rod 200 is fixed to the building wall column via a second anchor plate 520, achieving effective anchorage with the vertical components. Detailed node calculations should be performed at both anchorage points, considering factors such as fatigue and corrosion, to ensure structural safety throughout its entire lifespan.

[0037] In summary, this application successfully overcomes the technical bottleneck of sluggish response of traditional dampers under small displacement conditions by combining a lever amplification mechanism with a damping system. The displacement amplification function it provides enables the previously underutilized damper to operate efficiently, significantly improving the passive control capability of building structures under common seismic vibrations.

[0038] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A lever-type displacement amplification damper, characterized in that, include: A displacement amplification rod, one end of which is fixed to the bottom of a beam in the building structure; A support rod, one end of which is connected to the wall column of the building structure, and the other end is hinged to the displacement amplifying rod. The hinge point between the support rod and the displacement amplifying rod is the fulcrum. At least two support rods are provided, and each support rod is distributed in a figure-eight shape on both sides of the displacement amplifying rod. The distance between the top end of the displacement amplifying rod and the fulcrum is less than the distance between the bottom end of the displacement amplifying rod and the fulcrum. A damping device, comprising a viscous damper, one end of which is hinged to the bottom end of the displacement amplifying rod, and the other end of which is fixedly connected to the middle of the displacement amplifying rod.

2. The lever-type displacement amplification damper according to claim 1, characterized in that: Two viscous dampers are provided, and the two viscous dampers are distributed on both sides of the displacement amplification rod.

3. The lever-type displacement amplification damper according to claim 1, characterized in that: The damping device includes a rotating wheel and a friction wheel. The rotating wheel is rotatably connected to the bottom end of the displacement amplifying rod via a rotating shaft. The friction wheel is fixed to the bottom end of the displacement amplifying rod, and the friction wheel and the rotating wheel are in contact with each other.

4. The lever-type displacement amplification damper according to claim 3, characterized in that: It also includes a connecting rod, one end of which is hinged to the rotating shaft, and the other end is fixed at the eccentric position of the rotating wheel.

5. The lever-type displacement amplification damper according to claim 3, characterized in that: The rotating wheel and the friction wheel are arranged concentrically.

6. The lever-type displacement amplification damper according to claim 3, characterized in that: The bottom end of the displacement amplification rod is provided with a clearance groove, and the rotating wheel is installed in the clearance groove through the rotating shaft.

7. The lever-type displacement amplification damper according to claim 1, characterized in that: Both the displacement amplification rod and the support rod are square tube structures.

8. The lever-type displacement amplification damper according to claim 1, characterized in that: The top end of the displacement amplification rod is a short arm between the fulcrum and the top end of the displacement amplification rod, and the bottom end of the displacement amplification rod is a long arm between the fulcrum and the top end of the rod. The ratio of the length of the short arm to the length of the long arm is 1:

5.

9. The lever-type displacement amplification damper according to claim 1, characterized in that: The top of the displacement amplification rod is fixed to the bottom of the beam of the building structure by the first anchor plate.

10. The lever-type displacement amplification damper according to claim 9, characterized in that: The support rod is fixed to the wall column of the building structure by a second anchor plate.

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