Viscoelastic gap constrained nonlinear damper

Abstract

The utility model provides a kind of nonlinear damping damper of viscoelastic gap restraint, including outer shell, with damping cavity;Damping sub, it is set in damping cavity;Adjusting damping piece, it is equipped with multiple, each adjusting damping piece is set in damping cavity, for close or far from damping sub, change its compression amount by the reverse extrusion of damping sub to adjusting damping piece, to change nonlinear stiffness parameter damping parameter.The nonlinear damping damper of viscoelastic gap restraint provided by the utility model solves the problem of one-way energy consumption of existing linear damper and the inability to cope with multidirectional vibration by adjusting the gap between damping piece and damping sub and the reverse extrusion effect. Multiple adjusting damping pieces surround damping sub, and extrusion can be formed when vibration comes from any direction, low-amplitude vibration is inhibited by slight deformation of viscoelastic material when vibration amplitude is small, extrusion amount increases and energy consumption efficiency improves when amplitude increases, suitable for high-amplitude vibration. Nonlinear adaptation of damping characteristics is realized, covering wideband vibration.

Description

Technical Field

[0001] This utility model belongs to the field of structural vibration control technology, specifically relating to a nonlinear damping vibration damper with viscoelastic gap constraint. Background Technology

[0002] A damping vibration isolator is a device that suppresses vibration by consuming energy. Based on the principle of energy dissipation, damping vibration isolators convert the kinetic energy of mechanical vibration into other forms of energy such as heat energy and plastic deformation energy through friction and viscous resistance of damping materials or structures, thereby reducing and controlling vibration. Viscoelastic damping materials are polymer materials with both viscous and elastic properties, and are widely used in the fields of vibration reduction and control.

[0003] In existing technologies, vibration dampers mainly include spring isolators, rubber pads, and metal dampers. Although they have a certain energy dissipation capacity, they are mostly linear response structures, typically only designed for unidirectional or narrow-frequency vibrations, and are difficult to handle complex working conditions involving multiple directions, high amplitudes, and wide frequency ranges. Meanwhile, some new nonlinear damping structures suffer from problems such as unstable response, unadjustable parameters, and bulky structures in engineering applications, resulting in poor adaptability and practicality. Utility Model Content

[0004] This utility model provides a viscoelastic gap-constrained nonlinear damping vibration damper, which aims to solve the problems of poor adaptability and poor practicality of existing vibration dampers due to their inability to cope with complex working conditions.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a viscoelastic gap-constrained nonlinear damping vibration damper, comprising: The outer shell has a hollow vibration damping cavity; Vibration damper is disposed inside the vibration damping cavity; Multiple adjustable damping plates are provided, each of which is disposed in the vibration damping cavity. Each adjustable damping plate is used to move closer to or further away from the vibration damper, and the compression amount is changed by the reverse compression of the vibration damper to adapt to nonlinear vibration.

[0006] In one possible implementation, the damper is capsule-shaped.

[0007] In one possible implementation, the damper includes: The central column is cylindrical; Two end posts are provided, which are respectively set at both ends of the intermediate post along the axis of the intermediate post and are coaxial with the intermediate post. The diameter of the end post is smaller than that of the intermediate post. One end of the end post is integrally connected to the intermediate post, and the other end of the end post is provided with a spherical surface.

[0008] In one possible implementation, the outer shell is provided with n partitions, each of which is used to divide the damping cavity into n+1 damping spaces; The vibration damper is provided in multiple parts, and each vibration damper is arranged in a corresponding vibration damping space.

[0009] In one possible implementation, the housing is provided with a groove for inserting each of the partitions.

[0010] In one possible implementation, the adjustable damping plates are distributed on the inner walls of each damping space.

[0011] In one possible implementation, each of the adjustable damping plates includes: An adjusting shim is detachably connected at one end to the inner wall of the outer shell, and each adjusting shim is arranged parallel to the corresponding inner wall of the outer shell. A damping pad, one end of which is detachably connected to the adjusting pad, and the other end of which faces the vibration damper.

[0012] In one possible implementation, the damping pad is made of a viscoelastic material.

[0013] In one possible implementation, the outer shell is a panel assembly structure.

[0014] In one possible implementation, the outer casing is provided with a connecting seat for connecting the corresponding vibration damping device.

[0015] This implementation, compared to existing technologies, solves the problems of unidirectional energy consumption and inability to cope with multi-directional vibrations in existing linear vibration dampers by adjusting the gap between the damping plates and the vibration damper, as well as the reverse compression effect. Multiple adjustable damping plates surround the vibration damper, forming compression when vibration comes from any direction. When the vibration amplitude is small, the slight deformation of the viscoelastic material suppresses low-amplitude vibrations. When the amplitude increases, the compression amount increases and the energy consumption efficiency is improved, thereby changing the nonlinear stiffness and damping parameters. The gap can be preset or dynamically adjusted to achieve nonlinear adaptation of damping characteristics, covering a wide range of vibrations and exhibiting good adaptability. Attached Figure Description

[0016] Figure 1 A schematic diagram of the installation structure of a viscoelastic gap-constrained nonlinear damping vibration damper provided in an embodiment of this utility model; Figure 2 for Figure 1 Enlarged structural diagram at point A; Figure 3 A schematic diagram of the irregularly shaped vibration damper of the viscoelastic gap-constrained nonlinear damping vibration damper provided in the embodiment of this utility model; Figure 4A schematic diagram of the capsule-shaped vibration damper of the viscoelastic gap-constrained nonlinear damping vibration damper provided in the embodiment of this utility model; Figure 5 A schematic diagram of the outer shell and partition of a viscoelastic gap-constrained nonlinear damping shock absorber provided in an embodiment of this utility model; Explanation of reference numerals in the attached figures: 10. Outer shell; 11. Partition plate; 12. Connecting seat; 20. Vibration damper; 21. Intermediate column; 22. End column; 30. Adjustable damping plate. Detailed Implementation

[0017] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] It should be noted that the terms "length", "width", "height", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", and "tail" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0019] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a structure. 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 the internal communication between two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0020] 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 one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0021] Please refer to the following: Figures 1 to 5The viscoelastic gap-constrained nonlinear damping vibration isolator provided by this utility model will now be described. The viscoelastic gap-constrained nonlinear damping vibration isolator includes a housing 10, a damper 20, and adjustable damping plates 30. The housing 10 has a hollow damping cavity. The damper 20 is disposed within the damping cavity. Multiple adjustable damping plates 30 are provided, each disposed within the damping cavity. Each adjustable damping plate 30 is used to move closer to or further away from the damper 20, changing the compression amount by the reverse compression of the damper 20, thereby changing the nonlinear stiffness parameter and damping parameter.

[0022] The viscoelastic gap-constrained nonlinear damping vibration isolator provided in this embodiment, compared with the prior art, solves the problem of unidirectional energy consumption and inability to cope with multi-directional vibrations in existing linear vibration isolators by adjusting the gap between the damping plate 30 and the vibration isolator 20 and the reverse compression action. Multiple adjustable damping plates 30 surround the vibration isolator 20, and compression can be formed when the vibration comes from any direction. When the vibration amplitude is small, the slight deformation of the viscoelastic material suppresses low-amplitude vibrations. When the amplitude increases, the compression amount increases and the energy consumption efficiency is improved, adapting to high-amplitude vibrations. The gap can be preset or dynamically adjusted to achieve nonlinear adaptation of damping characteristics, cover a wide range of vibrations, and have good adaptability.

[0023] The viscoelastic gap-constrained nonlinear damping vibration damper provided in this embodiment can be made of hollow material, and damping particles can be set inside the vibration damper 20.

[0024] In some embodiments, the vibration damper 20 may employ, as shown in the following example: Figure 1 , Figure 2 , Figure 4 The structure shown. See also Figure 1 , Figure 2 , Figure 4 The vibration damper 20 is capsule-shaped.

[0025] The vibration damper 20 is designed in a capsule shape, optimizing the contact method and motion characteristics with each adjustable damping plate 30. This solves the problems of limited contact area, concentrated force, and delayed response to multi-directional vibrations in existing regular-shaped vibration dampers 20. The curved surface achieves "point-to-surface transition" contact, dispersing concentrated forces, avoiding structural damage, and extending service life. The curved surface characteristics allow the vibration damper 20 to move flexibly in multiple angles and directions without dead zones, enabling rapid response to multi-directional vibrations. The interior can be filled with an elastic medium or counterweight material to optimize mass distribution and elastic properties, adapting to vibrations of different amplitudes and improving the synergistic energy dissipation effect.

[0026] In some embodiments, the vibration damper 20 may employ, as shown in the following example: Figures 1 to 3 The structure shown. See also Figures 1 to 3The vibration damper 20 includes a central column 21 and end columns 22. The central column 21 is cylindrical. Two end columns 22 are provided, respectively disposed at both ends of the central column 21 along the axis of the central column 21 and coaxially arranged with the central column 21. The diameter of the end column 22 is smaller than the diameter of the central column 21. One end of the end column 22 is integrally connected to the central column 21, and the other end of the end column 22 is provided with a spherical surface.

[0027] The vibration damper 20 adopts a combined design of "intermediate column 21 + two end columns 22". The diameter of the end columns 22 is smaller than that of the intermediate column 21, and the ends are equipped with spherical surfaces. This solves the problems of low vibration transmission efficiency, insufficient energy dissipation, and easy jamming in existing vibration dampers 20. The intermediate column 21 ensures structural strength, and the stepped structure is guided by the end columns 22 to ensure precise displacement and avoid offset jamming. The spherical surfaces achieve point contact, improving the response speed of low-amplitude vibrations. As the vibration amplitude increases, the contact point expands into a contact area, achieving a smooth transition of nonlinear energy dissipation. The coaxial design ensures symmetrical force distribution, balancing strength, flexibility, and energy dissipation stability.

[0028] In some embodiments, the outer casing 10 may be adopted as follows: Figure 1 , Figure 2 , Figure 5 The structure shown. See also Figure 1 , Figure 2 , Figure 5 The outer shell 10 is provided with n partitions 11, each partition 11 is used to divide the vibration damping cavity into n+1 vibration damping spaces.

[0029] Multiple vibration dampers 20 are provided, and each vibration damper 20 is set in a corresponding vibration damping space.

[0030] The vibration damping cavity is divided into multiple damping spaces by the partition 11, with each space equipped with a damper 20, achieving multi-unit collaborative vibration damping. This solves the problems of limited damping capacity and narrow adaptability of existing single-unit vibration dampers. The multiple dampers 20 form a parallel working mode, and by setting different damping parameters for the damping spaces, they can adapt to vibrations of different frequency bands and amplitudes, achieving wide frequency range coverage. The collaborative operation of multiple units improves the overall damping capacity and can cope with high-amplitude vibrations. The partition 11 provides physical isolation to avoid mutual interference, and the modular design allows for adjustment of the number of damping units, improving product versatility and scalability.

[0031] In some embodiments, the outer casing 10 may be adopted as follows: Figure 1 , Figure 2 , Figure 5 The structure shown. See also Figure 1 , Figure 2 , Figure 5 The outer casing 10 is provided with a sliding groove for inserting each partition 11.

[0032] The outer casing 10 features a sliding groove for inserting the partition 11, solving the problems of fixed and inconvenient adjustment in existing modular vibration dampers. The partition 11 can be freely inserted and removed, flexibly adjusting the number and size of the vibration damping space to accommodate different specifications of vibration dampers 20 or clearance requirements. This simplifies the assembly process, eliminates the need for complex tools, and improves production efficiency and maintenance convenience. Precise control of the mating clearance ensures the verticality and stability of the partition 11 after installation, preventing abnormal operation of the vibration damping unit. The same outer casing 10 can accommodate different numbers and specifications of partitions 11, reducing design and manufacturing costs, dynamically optimizing vibration damping performance, and improving practicality and economy.

[0033] In some embodiments, the aforementioned adjustable damping plate 30 can be adopted as follows: Figure 1 , Figure 2 , Figure 5 The structure shown. See also Figure 1 , Figure 2 , Figure 5 Each adjustable damping plate 30 is distributed on the inner wall of each vibration reduction space.

[0034] The adjustable damping plates 30 are distributed on the inner walls of each vibration damping space, forming an all-directional enveloping damping constraint. This solves the problems of uneven damping plate distribution and insufficient multi-directional vibration suppression capability in existing vibration dampers. The 360° enveloping structure ensures that the vibration damper 20 can effectively contact and compress the corresponding damping plate when vibration comes from any direction. The distributed arrangement makes the vibration damper 20 subjected to balanced force, avoiding offset and jamming, reducing wear on individual damping plates, and extending service life. The damping plate parameters in different directions can be adjusted to specifically suppress vibrations in specific directions, improving multi-directional vibration adaptability and suppression effect.

[0035] In some embodiments, the aforementioned adjustable damping plate 30 can be adopted as follows: Figures 3 to 5 The structure shown. See also Figures 3 to 5 Each adjustable damping plate 30 includes an adjusting shim and a damping shim. One end of the adjusting shim is detachably connected to the inner wall of the outer casing 10, and each adjusting shim is arranged parallel to the corresponding inner wall of the outer casing 10. One end of the damping shim is detachably connected to the adjusting shim, and the other end of the damping shim faces the vibration damper 20.

[0036] The adjustable damping plate 30 is divided into detachable adjusting shims and damping shims, solving the problems of fixed damping parameters, poor adaptability, and high maintenance costs in existing dampers. By replacing adjusting shims of different thicknesses, the gap between the damping shims and the vibration damper 20 can be adjusted to adapt to vibrations of different amplitudes. By replacing damping shims of different hardness and materials, the damping characteristics can be adjusted to adapt to vibrations of different frequency bands. The detachable connection facilitates maintenance and replacement, reduces maintenance costs, and the parallel arrangement ensures contact flatness, improves the stability of vibration reduction, and realizes modular and replaceable adjustable damping parameters, improving product versatility and flexibility.

[0037] The adjustable damping plate 30 may be provided with an adjustment unit, which may be an adjustment screw. The adjustment screw passes through the side wall of the outer shell 10 and is threadedly connected to the outer shell 10. One end of the adjustment screw extends into the damping cavity or the corresponding damping space and abuts against the corresponding adjustable damping plate 30, so that the adjustment damping plate 30 can be moved closer to or away from the damper 20 by rotating the adjustment screw.

[0038] In some embodiments, the damping pad described above may be as follows: Figures 3 to 5 The structure shown. See also Figures 3 to 5 The damping pads are made of viscoelastic material.

[0039] The damping pads are made of viscoelastic material, solving the problems of low energy dissipation efficiency and slow response of existing damping materials. Viscoelastic material combines viscosity and elasticity, achieving dual energy dissipation through elastic deformation energy storage and internal molecular chain friction energy dissipation, resulting in higher energy dissipation efficiency than traditional materials. As the vibration amplitude increases, deformation and internal friction intensify, leading to a non-linear increase in energy dissipation efficiency, adapting to vibrations of different amplitudes. It possesses good fatigue resistance and aging resistance, extending its service life. Flexible contact buffers impact forces, preventing vibration rebound and ensuring the vibration damper's ability to suppress multi-directional, high-amplitude, and wide-frequency vibrations.

[0040] In some embodiments, the outer casing 10 may be adopted as follows: Figures 1 to 5 The structure shown. See also Figures 1 to 5 The outer shell 10 is a panel splicing structure.

[0041] The outer shell 10 is designed with a modular, panel-assembly structure, solving the problems of bulkiness, inconvenient assembly and disassembly, and high cost associated with existing unibody shells 10. Multiple panels can be disassembled and assembled, allowing for standardized production, reducing mold costs, and enabling customization of shell 10 sizes. The disassembled panels are small and lightweight, facilitating transportation and on-site assembly, thus reducing transportation costs. During maintenance, corresponding panels can be removed to open the outer shell 10 without damaging the overall structure, improving maintenance efficiency. The panel thickness and connection methods can be optimized to ensure structural stability, combining flexibility and economy.

[0042] In some embodiments, the outer casing 10 may be adopted as follows: Figure 1 , Figure 2 The structure shown. See also Figure 1 , Figure 2 The outer casing 10 is provided with a connecting seat 12, which is used to connect the corresponding vibration damping device.

[0043] The outer casing 10 is equipped with a connecting seat 12 for connecting the equipment to be vibration-damped, solving the problems of existing vibration dampers having a single connection method, poor adaptability, and insufficient stability. The connecting seat 12 can be designed in different structural forms to adapt to various installation interfaces, improving versatility. Integrated design or precise assembly ensures coaxiality and perpendicularity of the connection, avoiding force shift caused by installation deviations and improving the stability of the vibration damping effect. A buffer pad can be set to achieve a flexible connection, reduce vibration transmission, prevent loosening of the connection, and protect the equipment installation interface. The installation and disassembly process is simplified, the structural strength is optimized, the connection is ensured to be reliable under high-amplitude vibration environments, and the adaptability and ease of installation are improved.

[0044] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A nonlinear damping vibration damper with viscoelastic gap constraint, characterized in that, include: The outer shell has a hollow vibration damping cavity; Vibration damper is disposed inside the vibration damping cavity; Multiple adjustable damping plates are provided, each of which is disposed in the vibration damping cavity. Each adjustable damping plate is used to move closer to or further away from the vibration damper, and the compression amount is changed by the reverse compression of the vibration damper to adapt to nonlinear vibration.

2. The viscoelastic gap-constrained nonlinear damping vibration damper as described in claim 1, characterized in that, The vibration damper is capsule-shaped.

3. The viscoelastic gap-constrained nonlinear damping vibration damper as described in claim 1, characterized in that, The vibration damper includes: The central column is cylindrical; Two end posts are provided, which are respectively set at both ends of the intermediate post along the axis of the intermediate post and are coaxial with the intermediate post. The diameter of the end post is smaller than that of the intermediate post. One end of the end post is integrally connected to the intermediate post, and the other end of the end post is provided with a spherical surface.

4. The viscoelastic gap-constrained nonlinear damping vibration damper as described in claim 1, characterized in that, The outer shell is provided with n partitions, each of which is used to divide the vibration damping cavity into n+1 vibration damping spaces; The vibration damper is provided in multiple parts, and each vibration damper is arranged in a corresponding vibration damping space.

5. The viscoelastic gap-constrained nonlinear damping vibration damper as described in claim 4, characterized in that, The outer casing is provided with a sliding groove for inserting each of the partitions.

6. The viscoelastic gap-constrained nonlinear damping vibration damper as described in claim 4, characterized in that, Each adjustable damping plate is distributed on the inner wall of each vibration reduction space.

7. The viscoelastic gap-constrained nonlinear damping vibration damper as described in claim 1, characterized in that, Each of the aforementioned adjustable damping plates includes: An adjusting shim is detachably connected at one end to the inner wall of the outer shell, and each adjusting shim is arranged parallel to the corresponding inner wall of the outer shell. A damping pad, one end of which is detachably connected to the adjusting pad, and the other end of which faces the vibration damper.

8. The viscoelastic gap-constrained nonlinear damping vibration damper as described in claim 7, characterized in that, The damping pad is made of viscoelastic material.

9. The viscoelastic gap-constrained nonlinear damping vibration damper as described in claim 1, characterized in that, The outer shell is a panel assembly structure.

10. The viscoelastic gap-constrained nonlinear damping vibration damper as described in claim 1, characterized in that, The outer casing is provided with a connecting seat, which is used to connect the corresponding vibration damping device.

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