A shock absorbing base

Abstract

The application discloses a damping base, and relates to the technical field of damping. The damping base is mainly composed of an upper support, a lower support, a rubber damping layer and a plurality of spring plates. The inner cavity of the upper support is filled with liquid damping medium, the inner cavity of the lower support is filled with granular damping material, and the rubber damping layer is arranged between the upper support and the lower support. The plurality of spring plates are vertically arranged between the upper and lower supports, and the two ends are respectively adhered and fixed to the side walls of the upper and lower supports. The damping base can target consume low-frequency vibration energy through liquid damping, and can also effectively dissipate wide-frequency vibration energy with the help of granular damping. The two work together to comprehensively cover the full-frequency vibration suppression requirement, effectively solving the problems of narrow vibration isolation frequency band and poor low-frequency damping effect of the existing damping device. In addition, the upper and lower supports adopt a high-proportion cavity structure, which realizes lightweight configuration while ensuring the overall structural rigidity.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction technology, and specifically to a vibration reduction base. Background Technology

[0002] As high-end equipment manufacturing accelerates its transformation towards high power density, high speed, and intelligence, vibration and dynamic control issues in various mechanical systems are becoming increasingly prominent in modern industry and technology. Excessive structural vibration and external excitation not only exacerbate fatigue damage to mechanical components and accelerate structural aging, but also reduce the service life and operational stability of the entire equipment. In the vibration reduction design of large power equipment, spring steel vibration isolators are currently the most widely used and common solution in the industry. However, with the increasing demands of modern precision equipment for vibration isolation performance, operational accuracy, and structural reliability, the comprehensive performance of traditional elastic supports is no longer sufficient to meet the needs of actual working conditions.

[0003] The damping performance of spring steel vibration isolators mainly relies on the unstable inter-plate dry friction between the steel plates. This results in not only high static friction but also difficulty in adjusting the damping parameters to match the operating conditions. Furthermore, their solid structure design leads to high self-weight, low specific stiffness, and low specific energy, failing to meet the lightweight and integrated requirements of modern equipment. Additionally, their ability to resist lateral and torsional loads is insufficient, making them prone to lateral instability during operation. This typically necessitates the addition of guide and limiting mechanisms, increasing system complexity and manufacturing costs. Moreover, they lack effective low-frequency damping, making them susceptible to significant shaking when the system passes through the resonance range or experiences instantaneous external impacts, and they have weak resistance to external horizontal disturbances. Summary of the Invention

[0004] To address the problems of uncontrollable and unsatisfactory damping performance, large weight, low specific stiffness and specific energy, weak resistance to lateral force and torsional load, which easily leads to lateral instability, and lack of effective low-frequency damping in traditional vibration isolation and damping equipment, this invention provides a vibration damping base.

[0005] In a first aspect, the present invention provides a shock-absorbing base, comprising: The upper support has an upper receiving cavity inside, which is filled with a liquid damping medium. The lower support has a lower receiving cavity inside, which is filled with particulate damping material. A rubber damping layer is disposed between the upper support and the lower support; Several spring plates are vertically disposed between an upper support and a lower support, configured to bend and deform when the upper support presses against the lower support to provide elastic damping force; In conjunction with the first aspect, in one embodiment, the two ends of a plurality of spring plates are respectively attached and fixed to the side walls of the upper support and the lower support to limit the lateral relative displacement between the upper support and the lower support.

[0006] In conjunction with the first aspect, in one embodiment, lateral extension edges are respectively provided on the opposite sidewalls of the upper support and the lower support, and the upper and lower ends of the spring plate are respectively abutted and fixed on the lateral extension edges.

[0007] In conjunction with the first aspect, in one embodiment, the two ends of the spring plate are clamped and fixed to the side walls of the upper support and the lower support by spring plate clamping blocks; the spring plate clamping blocks press and fix the spring plate by bolts.

[0008] In conjunction with the first aspect, in one embodiment, the volume of the upper receiving cavity accounts for 40% to 60% of the overall volume of the upper support; and the volume of the lower receiving cavity accounts for 45% to 65% of the overall volume of the lower support.

[0009] In conjunction with the first aspect, in one embodiment, the liquid damping medium is a liquid material with high fluidity and low volatility; the particulate damping material is a high-density particulate material; and the spring plate is made of spring steel with a thickness of 4-6 mm.

[0010] In conjunction with the first aspect, in one embodiment, the rubber damping layer is a rubber sheet, which is stacked between the bottom surface of the upper support and the top surface of the lower support.

[0011] In conjunction with the first aspect, in one embodiment, the rubber sheet is made of neoprene rubber and has a thickness of 5-7 mm.

[0012] In conjunction with the first aspect, in one embodiment, the side of the upper support is provided with an injection hole and a straight-through shut-off valve.

[0013] Secondly, the present invention provides a vibration isolation system, comprising: a device to be vibration-damped, a foundation platform, and the aforementioned vibration-damping base; the vibration-damping base is disposed between the device to be vibration-damped and the foundation platform, the upper support is connected to the device to be vibration-damped, and the lower support is connected to the foundation platform.

[0014] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: The vibration damping base provided by this invention adopts a multi-mechanism composite damping design: the upper support is filled with a liquid damping medium, which uses liquid sloshing and gas pressure changes to directionally dissipate low-frequency vibration energy; the lower support is filled with particulate damping material, which efficiently dissipates broadband vibration energy through friction and collision between particles. The upper and lower supports are connected by spring plates to form an elastic support frame, relying on springs to achieve high-frequency vibration isolation. At the same time, rubber plates are set between the supports, which use their viscoelastic damping to assist in energy absorption. The whole can achieve efficient vibration isolation and reduction across the entire frequency band, from low-frequency targeted vibration absorption to high-frequency and broadband energy dissipation. This effectively solves the technical problems of narrow vibration isolation frequency band and poor low-frequency vibration reduction effect of existing vibration damping products. In addition, the upper and lower supports adopt a high-percentage cavity structure, which achieves a lightweight configuration while ensuring the overall structural rigidity, and significantly improves the specific stiffness and specific energy of the device. This invention overcomes the shortcomings of traditional dry friction damping, such as susceptibility to dust and rust interference and unstable performance, by using stabilizing media such as ethylene glycol antifreeze, lead beads, and neoprene rubber. It also supports the adjustment of damping parameters by adjusting the internal cavity air pressure and the type of filler. In terms of structural connection, the entire device relies on spring plates and bolts to lock together to achieve a reliable connection between the upper and lower supports. It is also equipped with an intermediate rubber layer to enhance the resistance to lateral and torsional loads, effectively solving the problem of weak lateral force and torsional resistance of traditional steel leaf springs, which leads to lateral instability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of an embodiment of the shock-absorbing base of the present invention; Figure 2 This is a rear view of an embodiment of the shock-absorbing base of the present invention.

[0017] In the diagram: 1. Upper support; 2. Lower support; 3. Spring plate; 4. Spring plate pressure block; 5. Particulate damping material; 6. Liquid damping medium; 7. Rubber damping layer; 8. Connection hole; 9. Lifting hole; 10. Mounting hole; 11. Liquid injection hole; 12. Straight-through shut-off valve. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Liquid damping media are mainly suitable for low-frequency vibration reduction. During operation, they continuously dissipate vibration energy through liquid flow and mutual sloshing, effectively reducing resonance phenomena during equipment start-up, shutdown, and operating condition switching, and significantly alleviating large-amplitude low-frequency sloshing. This damping method does not have the problem of jamming caused by static friction, and the operating response is smooth. The larger the vibration displacement, the more intense the liquid movement, and the higher the energy dissipation efficiency. However, its suppression effect on medium and high-frequency vibrations is relatively poor.

[0020] Particle damping materials are mainly suitable for medium-frequency vibration conditions. They rely on continuous collisions and friction between particles and between particles and the cavity wall to achieve energy attenuation, resulting in stable and reliable vibration reduction. They employ an all-solid-state structure, completely avoiding leakage problems, and have excellent dustproof capabilities, making them adaptable to complex and harsh field environments. Simultaneously, the filling particles can lower the overall center of gravity of the device, enhancing the base's resistance to tipping and disturbance. However, they are difficult to effectively control low-frequency resonance.

[0021] See Figure 1 and Figure 2 As shown, the present invention provides a shock-absorbing base, comprising: Upper support 1, lower support 2, spring plate 3, spring plate pressure block 4, particulate damping material 5, liquid damping medium 6, rubber damping layer 7, connecting hole 8, lifting hole 9, mounting hole 10, liquid injection hole 11, straight-through shut-off valve 12.

[0022] The upper support 1 has an upper cavity filled with liquid damping medium 6; the lower support 2 has a lower cavity filled with particulate damping material 5; a rubber damping layer 7 is disposed between the upper support 1 and the lower support 2; and several spring plates 3 are vertically disposed between the upper support 1 and the lower support 2, configured to bend and deform when the upper support 1 presses against the lower support 2 to provide elastic damping force.

[0023] In this embodiment, since the lower cavity of the lower support 2 is filled with particulate damping material 5, when the equipment vibrates, it will cause the particulate damping material in the lower support cavity to slide back and forth, collide with each other, and rub against each other. The vibration mechanical energy is continuously converted into frictional heat energy. The collision deformation of the particulate damping material will also generate a small amount of heat stagnation. Therefore, the particulate damping material cavity will accumulate and rise in temperature under continuous working conditions. Therefore, the bottom plate of the lower support 2 adopts a stamped plate structure formed by one-piece stamping. Compared with a flat solid cast bottom plate, it effectively increases the heat exchange area. The heat generated inside the cavity can be quickly conducted and diffused to the outside air through the stamped bottom plate, suppressing the heat accumulation and temperature rise inside the cavity; avoiding the expansion of the air inside the cavity and the change of the particle gap caused by high temperature, preventing the damping coefficient from drifting with temperature, and ensuring that the damping parameters are stable and controllable for a long time.

[0024] Furthermore, the reason for filling the upper cavity with liquid damping medium 6 and the lower cavity with particulate damping material 5 is that the upper cavity has a larger vibration displacement, which is conducive to the dissipation of energy by liquid sloshing and can give full play to the low-frequency vibration reduction effect of the liquid damping medium. The lower cavity has weak vibration, and the particles absorb mid-to-high frequency vibrations through collision and friction. Moreover, the particulate damping material located in the lower cavity can lower the overall center of gravity, improve the stability of the base, and reduce the eccentric load of the spring. If the top and bottom are reversed, the center of gravity of the device will be raised, making it prone to tipping over and instability. The liquid excitation will be insufficient, the damping will be weakened, and the open structure in the lower cavity will be difficult to seal properly. The layered application of the two damping structures can complement each other's advantages and disadvantages, cover the mid-to-low frequency vibration range, achieve full-frequency vibration reduction, and significantly improve the overall vibration reduction performance and operational reliability of the device.

[0025] In this embodiment, without affecting the structural strength of the vibration damping base, the overall weight can be adjusted by changing the spatial proportion of the accommodating cavities of the upper support 1 and the lower support 2. During the design and assembly stages, the volume of the accommodating cavity of the upper support 1 or the lower support 2 can be modified individually according to the actual load and vibration damping matching requirements, or both supports can be adjusted simultaneously. Increasing the inner cavity volume reduces the overall weight of the device, while decreasing the inner cavity volume increases the weight, ultimately achieving a reduction or increase in the overall weight of the vibration damping base.

[0026] In some embodiments, the two ends of several spring plates 3 are respectively attached to and fixed to the side walls of the upper support 1 and the lower support 2 to limit the lateral relative displacement between the upper support 1 and the lower support 2.

[0027] In this embodiment, the side walls of the upper support 1 and the lower support 2 are connected by four spring plates, two on each opposite side. When the damping base is subjected to external forces and undergoes structural vibration, the spring plates, with their high elasticity and high structural stiffness, absorb energy through elastic deformation while simultaneously dissipating the vibration load through a dual mechanism of material internal friction and inter-plate friction. Furthermore, the damping base formed by assembling multiple spring steel plates also possesses excellent high-frequency vibration isolation capabilities.

[0028] In some embodiments, lateral extension edges are provided on the opposite sidewalls of the upper support 1 and the lower support 2, and the upper and lower ends of the spring plate 3 are respectively abutted and fixed on the lateral extension edges.

[0029] In some embodiments, the two ends of the spring plate 3 are clamped and fixed to the side walls of the upper support 1 and the lower support 2 by spring plate clamping blocks 4; the spring plate clamping blocks 4 are connected to the upper support 1 or the lower support 2 by bolts to press and fix the spring plate 3.

[0030] In this embodiment, each spring plate 3 is clamped and fixed to the side walls of the upper support 1 and the lower support 2 by two spring plate clamping blocks 4 at both ends; each spring plate clamping block 4 is used to press and fix the spring plate 3 tightly by four bolts. When the system is in a vibration state, the spring plate clamping blocks can force all spring plates to always keep them tightly fitted to smoothly transmit the force; at the same time, the spring plate clamping blocks can firmly lock each spring plate to prevent it from moving left and right, or from falling off, thus preventing the spring plates from falling off or cracking and failing from the root, thereby ensuring that all spring plates are always in the correct stress state.

[0031] In some embodiments, the volume of the upper receiving cavity accounts for 40% to 60% of the overall volume of the upper support 1; and the volume of the lower receiving cavity accounts for 45% to 65% of the overall volume of the lower support 2.

[0032] In this embodiment, the upper and lower receiving cavities are designed according to the overall weight and rigidity of the shock-absorbing base. Preferably, the volume of the upper receiving cavity is 0.0209 m³. 3 It accounts for 49% of the total volume of the upper support, and the volume of the lower cavity is 0.02327m. 3 It accounts for 55% of the total volume of the lower support. Under the premise of meeting the stiffness requirements, the volume ratio of the corresponding accommodating cavity of the upper support 1 and / or lower support 2 can be appropriately increased or decreased to achieve the effect of reducing or increasing the weight of the overall shock-absorbing base.

[0033] In some embodiments, the liquid damping medium 6 is a liquid material with high fluidity and low volatility; the particulate damping material 5 is a high-density particulate material; and the spring plate 3 is made of spring steel with a thickness of 4-6 mm.

[0034] In this embodiment, preferably, the liquid damping medium 6 is an ethylene glycol-based antifreeze, which has a wide range of applications at high and low temperatures. It is not easy to freeze at low temperatures and not easy to vaporize at high temperatures. It is less affected by temperature, has a moderate viscosity, and can stably dissipate vibration energy by relying on internal friction. At the same time, it contains anti-corrosion additives, which can effectively protect the cavity from corrosion. It also has low volatilization loss, low procurement cost, and high safety in use, making it suitable for long-term use of the shock-absorbing base.

[0035] In this embodiment, the granular damping material 5 is preferably made of lead beads. Lead beads have a high density and a greater mass for the same volume, resulting in stronger collisions and friction between particles and between particles and the cavity wall during vibration, leading to high energy dissipation efficiency and significant mid-frequency vibration reduction. Furthermore, the lead beads are regularly spherical in shape, allowing for smooth and unobstructed movement, uniform and stable damping output, and the soft texture of lead minimizes collision wear and generates low noise during operation. Its stable chemical properties and resistance to corrosion allow for long-term stable use under various complex industrial conditions. In addition, the lead beads, as granular damping material, filling the lower cavity effectively lowers the overall center of gravity of the vibration damping base, enhancing its resistance to lateral disturbances and overturning, ensuring stable equipment operation.

[0036] In this embodiment, the spring plate can be made of any one of 65Mn, 60Si2Mn, 55SiMnVB, or 60Si2CrA. Preferably, the spring plate is made of 60Si2Mn and has a thickness of 5 mm.

[0037] In some embodiments, the rubber damping layer 7 is a rubber sheet, which is stacked between the bottom surface of the upper support 1 and the top surface of the lower support 2, and is fixed to the bottom surface of the upper support 1 and the top surface of the lower support 2 by adhesive.

[0038] In some embodiments, the rubber damping layer 7 is made of neoprene rubber and has a thickness of 5-7 mm.

[0039] In this embodiment, the rubber plate located between the bottom surface of the upper support 1 and the top surface of the lower support 2 can absorb high-frequency vibrations through its own viscoelasticity, forming an energy-dissipating complementarity with the spring plate, the liquid damping medium in the upper cavity, and the particulate damping material in the lower cavity. Simultaneously, the rubber plate also acts as an intermediate connector between the upper and lower supports, preventing loosening and misalignment due to long-term vibration, reinforcing lateral and torsional stiffness, improving the insufficient lateral stability of the spring plate, and working together with the upper and lower supports to form sealed cavities, protecting the internal liquid damping medium 6 and particulate damping material 5, preventing leakage and dust intrusion. Preferably, the thickness of the rubber plate is 6 mm.

[0040] In some embodiments, the upper support 1 is provided with an injection hole 11 and a straight-through shut-off valve 12 on its side.

[0041] In this embodiment, injection holes 11 are respectively provided at both ends of the same side of the upper support 1, and a straight-through shut-off valve 12 is provided at the middle position of the side. The injection holes are used to fill the liquid damping medium 6 in the upper receiving cavity and seal it. Both the injection holes 11 and the straight-through shut-off valve 12 are provided with sealing rings to prevent leakage of the liquid damping medium 6 in the upper support 1 and the entry of foreign objects. Providing injection holes at both ends of the same side can appropriately reduce the uneven flow of the liquid damping medium 6 and improve efficiency. If only one side is filled with liquid, the presence of the baffle will cause uneven liquid flow on the left and right sides during injection, which will affect the overall balance of the shock-absorbing base. The straight-through shut-off valve provided at the middle position of the side is responsible for evacuating, releasing, and regulating air pressure. Through opening and closing and opening degree control, the gas pressure inside the upper support 1 is precisely controlled to ensure a stable air pressure environment.

[0042] In this embodiment, the surfaces of the upper support 1 and / or the lower support are provided with a plurality of lifting holes, mounting holes, and connecting holes, wherein the connecting holes and mounting holes are through holes. Specifically, as shown in the figure... Figure 1 As shown, lifting holes, mounting holes, and connecting holes are provided at each of the four corners; additionally, three connecting holes and two mounting holes are provided on the central baseline of the support surface. Furthermore, three mounting holes are provided above the baseline, and two mounting holes are provided below the baseline. This arrangement achieves a uniform distribution and secure connection of holes across the entire plate surface. The positional relationship of the lifting holes, connecting holes, and mounting holes is designed based on the available space of the component being installed, avoiding interference with the receiving cavities in the upper and lower supports.

[0043] The lifting holes provide a safe and reliable dedicated lifting force point, facilitating efficient handling and precise positioning of the device during transportation and on-site installation. This ensures a horizontal lifting posture to prevent uneven distribution of internal media and avoids direct contact between lifting slings and precision components such as spring plates and shut-off valves, preventing damage. It also facilitates disassembly and replacement during later maintenance and repair. The mounting holes are used to securely hold the triangular brackets containing the equipment to be damped. The connecting holes primarily anchor the damping base firmly to the foundation platform using bolts, ensuring effective transmission of vertical loads and lateral vibration forces. This prevents the damping base from sliding, shifting, or overturning under the vibration of the equipment or external impacts, thus guaranteeing the overall stability and safety of the damping base. Furthermore, they facilitate quick positioning and fixing by construction personnel, ensuring the damping base functions normally in its designed position and preventing damage to damping performance or safety hazards caused by base loosening.

[0044] The present invention also provides a vibration isolation system, including: a device to be vibration damped, a foundation platform, and the aforementioned vibration damping base; the vibration damping base is disposed between the device to be vibration damped and the foundation platform, with the upper support 1 connected to the device to be vibration damped and the lower support 2 connected to the foundation platform.

[0045] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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 the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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 between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0046] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A shock-absorbing base, characterized in that, include: The upper support (1) has an upper receiving cavity inside, which is filled with a liquid damping medium (6). The lower support (2) has a lower receiving cavity inside, which is filled with particulate damping material (5). A rubber damping layer (7) is disposed between the upper support (1) and the lower support (2); Several spring plates (3) are vertically arranged between the upper support (1) and the lower support (2) and are configured to bend and deform when the upper support (1) presses against the lower support (2) to provide elastic damping force.

2. The shock-absorbing base according to claim 1, characterized in that: The two ends of the plurality of spring plates (3) are respectively attached to and fixed to the side walls of the upper support (1) and the lower support (2) to limit the lateral relative displacement between the upper support (1) and the lower support (2).

3. The shock-absorbing base according to claim 2, characterized in that: Lateral extension edges are respectively provided on the opposite side walls of the upper support (1) and the lower support (2), and the upper and lower ends of the spring plate (3) are respectively abutted and fixed on the lateral extension edges.

4. The shock-absorbing base according to claim 3, characterized in that: The two ends of the spring plate (3) are clamped and fixed on the side walls of the upper support (1) and the lower support (2) by spring plate pressure blocks (4); the spring plate pressure blocks (4) press and fix the spring plate (3) by bolts.

5. The shock-absorbing base according to claim 1, characterized in that: The volume of the upper cavity accounts for 40% to 60% of the total volume of the upper support (1); the volume of the lower cavity accounts for 45% to 65% of the total volume of the lower support (2).

6. The shock-absorbing base according to claim 1, characterized in that: The liquid damping medium (6) is a liquid material with high fluidity and low volatility; the particulate damping material (5) is a high-density particulate material; the spring plate (3) is made of spring steel and has a thickness of 4~6 mm.

7. The shock-absorbing base according to claim 1, characterized in that: The rubber damping layer (7) is a rubber plate, which is stacked between the bottom surface of the upper support (1) and the top surface of the lower support (2).

8. The shock-absorbing base according to claim 7, characterized in that: The rubber sheet is made of neoprene rubber and has a thickness of 5-7 mm.

9. The shock-absorbing base according to claim 1, characterized in that: The upper support (1) is provided with an injection hole (11) and a straight-through shut-off valve (12) on its side.

10. A vibration isolation system, characterized in that, include: The device to be damped, the foundation platform, and the damping base as described in any one of claims 1 to 9; the damping base is disposed between the device to be damped and the foundation platform, the upper support (1) is connected to the device to be damped, and the lower support (2) is connected to the foundation platform.

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