Compaction table noise reduction support based on ACF

Abstract

The utility model discloses an ACF (Anisotropic Conductive Film)-based compaction table noise reduction support, which belongs to the technical field of industrial vibration reduction, realizes long-time work through the cooperation of a fixing nail groove, an ACF artificial cartilage cushion layer, a spherical groove outer frame, a hard hemispherical block, an MRF (Magnetic Resonance Framework) magnetorheological fluid bourdon tube, a lead coil and magnetorheological fluid, is strong in adaptability, is a novel device structure design, and is suitable for popularization and application. The ACF is a novel intelligent biomimetic material and has excellent energy absorption capacity and sound absorption capacity, carbonyl iron powder particles rapidly form a chain structure in synthetic oil under the action of an external magnetic field of the MRF, liquid flow is stopped, so that the yield stress of the magnetorheological fluid is remarkably increased, the conversion time is extremely short and reversible, and the conversion speed is high. Therefore, the magnetorheological fluid has extremely high application value in a dynamic control system.

Description

Technical Field

[0001] This utility model relates to a vibration table noise reduction support based on ACF, belonging to the field of industrial vibration reduction technology. Background Technology

[0002] A concrete vibrating table (or vibrating table) is a vibration device specifically designed for the production of concrete and precast components. A commonly used vibrating table in modern engineering mainly consists of a base frame, vibrator springs, a table surface, a motor, and a pair of identical eccentric wheels. The vibration force generated by the motor is transmitted to the concrete product on the worktable through the support structure. This vibration force causes the particles inside the concrete to rearrange, reducing porosity and increasing the density of the concrete. Simultaneously, the vibration force also expels air from within the concrete, further improving its quality and strength.

[0003] ACF (Artificial Cartilage Foam) is a multi-layered, continuously tunable micro-nano composite structure that mimics the high toughness and low elastic modulus of natural cartilage in terms of mechanical properties. ACF possesses excellent impact resistance, shock absorption, durability, and environmental sustainability, aligning with the national trend of new energy development.

[0004] The interior of ACF contains micron-sized pores with some interconnection between them. The surface of the pores is covered with groove-like protrusions, the height of which is at the nanometer level. This structure allows the ACF artificial cartilage material to effectively absorb and disperse sound energy when subjected to sound wave impact, thereby reducing noise levels.

[0005] Magnetorheological fluid (MRF) is a novel fluid with controllable flowability, belonging to a class of smart materials that is under active research. It is a suspension composed of tiny soft magnetic particles with high magnetic permeability and low magnetic hysteresis, and a non-magnetic liquid (mineral oil is used in this device). This suspension exhibits low-viscosity Newtonian fluid characteristics under zero magnetic field conditions, but transforms into high-viscosity, low-flow Bingham fluid under the action of an applied magnetic field. The viscosity of the magnetorheological fluid is related to the magnetic flux, and this conversion has low energy consumption, is easy to control, and has a rapid response, making it a high-quality material with low current energy consumption.

[0006] Mineral oil has additive compatibility and good lubrication properties. It is chemically stable and not easily deteriorated, making it a suitable base liquid for the preparation of MRF in the equipment.

[0007] The range of sound levels that the human body can tolerate is 20-60 dB. When the sound exceeds 60 dB, prolonged exposure may cause discomfort, while sound levels exceeding 90 dB may cause harm, such as stimulating the inner ear nerve, leading to tinnitus, hearing loss, etc.

[0008] For example, CN112855842A discloses a vibration-damping and noise-reducing vibratory compaction table. This table includes a compaction platform for supporting the compaction device and the material to be compacted. It also includes a two-stage vibration damping component, a soundproof enclosure component, and a counterweight. One end of the counterweight is fixedly connected to the compaction platform, and the other end is fixedly connected to the two-stage vibration damping component. The compaction platform, the two-stage vibration damping component, and the counterweight are all covered by the soundproof enclosure component. When the compaction platform is subjected to vibration, the two-stage vibration damping component can buffer the force transmitted through the counterweight, and the soundproof enclosure component can block the noise generated by the vibration of the compaction platform, thus achieving vibration and noise reduction. The vibration-damping and noise-reducing vibratory compaction table disclosed in this invention employs a noise reduction mechanism composed of a two-stage vibration damping component, a soundproof enclosure component, and a counterweight, enabling the compaction table to reliably reduce vibration and noise, thereby reducing noise pollution and the range of noise impact.

[0009] Shortcomings of existing technology:

[0010] 1- The concrete vibration table has deficiencies in noise reduction measures, and the noise affects the test environment to some extent;

[0011] 2- The impact energy absorption during the compaction process is limited, which causes some damage to the instrument itself.

[0012] Therefore, a vibration table noise reduction support based on ACF is needed to improve the above-mentioned shortcomings. Utility Model Content

[0013] The main purpose of this invention is to provide a vibration table noise reduction support based on ACF.

[0014] The objective of this utility model can be achieved by adopting the following technical solution:

[0015] A vibration table noise reduction support based on ACF includes a spherical groove outer frame for limiting positioning;

[0016] An ACF artificial cartilage pad is laid at the bottom of the inner part of the spherical groove outer frame. An MRF magnetorheological fluid spring tube is coiled and fixed on the spherical groove outer frame. A rigid hemispherical block is spring-loaded at the outer end of the MRF magnetorheological fluid spring tube.

[0017] The MRF magnetorheological fluid spring tube is filled with magnetorheological fluid, and a conducting coil is wound around the MRF magnetorheological fluid spring tube.

[0018] Preferably, the outer frame of the spherical groove is provided with fixing nail slots around its perimeter.

[0019] Preferably, the rigid hemispherical block is fixed and supported by an MRF magnetorheological fluid spring tube, and there is a cavity structure between the rigid hemispherical block and the spherical groove outer frame.

[0020] Preferably, the thickness of the ACF artificial cartilage pad is 1.5 to 2.0 cm, and the thickness of the arc-shaped cartilage pad at the bottom of the ACF artificial cartilage pad is 0.5 to 0.8 d.

[0021] Preferably, the spherical groove outer frame and the rigid hemispherical block are spring-connected by at least 5 MRF magnetorheological fluid spring tubes.

[0022] Preferably, the spherical groove outer frame is fixedly connected by a fixing nail groove, the ACF artificial cartilage pad is an impact structure on at least one side, and the ACF artificial cartilage pad absorbs 20% to 30% of the sound.

[0023] The beneficial technical effects of this utility model are as follows:

[0024] This utility model provides a vibration table noise reduction support based on ACF. This device achieves long-term operation and strong adaptability through the cooperation of fixed nail groove, ACF artificial cartilage pad, spherical groove outer frame, rigid hemispherical block, MRF magnetorheological fluid spring tube, conductor coil and magnetorheological fluid. It is a new type of device structure design that can absorb about 97% of energy and reduce noise.

[0025] ACF is a novel intelligent biomimetic material with excellent energy absorption and sound absorption capabilities.

[0026] Under the action of an external magnetic field, carbonyl iron powder particles rapidly form a chain structure in synthetic oil, which prevents the liquid from flowing and thus significantly increases the yield stress of the magnetorheological fluid. This transformation time is extremely short and reversible, making the magnetorheological fluid extremely valuable for application in dynamic control systems. Attached Figure Description

[0027] Figure 1 This is a front view of the overall structure of a preferred embodiment of a vibration table noise reduction support based on ACF according to the present invention.

[0028] Figure 2 This is a top view of a preferred embodiment of a vibration table noise reduction support based on ACF according to the present invention;

[0029] Figure 3 This is a diagram showing the arrangement of the magnetorheological fluid spring tube and conductive coil of a preferred embodiment of an ACF-based vibration table noise reduction support according to the present invention.

[0030] Figure 4This is a schematic diagram of the magnetorheological fluid preparation process used in a preferred embodiment of a vibration table noise reduction support based on ACF according to the present invention.

[0031] In the diagram: 1. Fixation pin groove; 2. ACF artificial cartilage pad; 3. Spherical groove outer frame; 4. Rigid hemispherical block; 5. MRF magnetorheological fluid spring tube; 5001. Conductor coil; 5002. Magnetorheological fluid. Detailed Implementation

[0032] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0033] like Figure 1 - Figure 4 As shown, this embodiment provides a vibration table noise reduction support based on ACF, including a spherical groove outer frame 3 for limiting position;

[0034] An ACF artificial cartilage pad 2 is laid at the bottom of the inner part of the spherical groove outer frame 3. An MRF magnetorheological fluid spring tube 5 is coiled and fixed on the spherical groove outer frame 3. A rigid hemispherical block 4 is spring-loaded at the outer end of the MRF magnetorheological fluid spring tube 5.

[0035] The MRF magnetorheological fluid spring tube 5 is filled with magnetorheological fluid 5002, and a conductor coil 5001 is wound around the MRF magnetorheological fluid spring tube 5.

[0036] The device combines the energy absorption and sound absorption properties of the ACF artificial cartilage cushion layer 2 with the active current energy dissipation function of the MRF magnetorheological fluid 5002. It employs a double-cushion arrangement with spacers and four-way MRF magnetorheological fluid spring tubes 5. During vibration table operation, it reduces noise and protects the instrument. If the vibration table is placed on a less safe platform, the energy absorption device can also protect the test site to some extent. Artificial cartilage foam (ACF) is a biomimetic energy-absorbing material that can directly absorb over 90% of the impact energy through hysteretic deformation and convert it into low-grade heat energy. The material also contains many micron-sized pores with some interconnection, giving the ACF artificial cartilage cushion layer 2 excellent sound absorption performance. The sound level of the vibration table is around 90 dB; after absorption by the ACF artificial cartilage cushion layer 2, it can be controlled to below 60 dB, without affecting normal conversation among laboratory personnel. The magnetorheological fluid... Fluid, or MRF for short, is a novel controllable intelligent fluid for energy absorption. It is formed by near-nanoscale magnetic particles dispersed in a non-magnetic carrier fluid. The MRF magnetorheological fluid 5002 in this device uses carbonyl iron powder with high magnetic saturation as the magnetic particles, mineral oil as the base fluid, and adds a dispersant to improve the fluid's redispersibility, giving the prepared magnetorheological fluid good durability and a longer working time. MRF magnetorheological fluid spring tubes are placed at the bottom and around the base, ensuring the initial stiffness of the spring tubes is just enough to support the hemispherical plate a certain distance. The rigid hemispherical block 4 is made of lightweight carbon fiber alloy to reduce its weight and lower the pressure on the underlying ACF artificial cartilage pad layer. The base groove and... The plate that directly bears the impact adopts a spherical contact surface to increase the contact area for indirect impacts, while also giving the device a certain fault tolerance performance for eccentric impacts. The thickness of the top cartilage pad is designed to be 1.5-2.0 cm, and the thickness of the bottom arc-shaped cartilage pad is designed to be 0.5-0.8 dd, which is the distance between the hemispherical block and the base pad when there is no impact. The two sides of the ACF artificial cartilage pad that directly bears the impact at the top should coincide with the impact surface at the bottom of the vibration table as much as possible. The two ends of the five MRF magnetorheological fluid spring tubes 5 are connected to the base and the rigid hemispherical block 4, respectively. The MRF magnetorheological fluid spring tubes 5 are connected to the power supply of the vibration table. When the vibration table is running, ensure that the MRF magnetorheological fluid spring tubes 5 are energized at the same time, and the magnetorheological fluid thickens and absorbs energy.

[0037] The outer frame 3 of the spherical groove has fixing nail slots 1 around its perimeter.

[0038] The base is provided with fixing nail grooves 1 at the bottom and around the perimeter for overall fixation. The ACF artificial cartilage pad 2 withstands direct and indirect impacts respectively. The MRF magnetorheological fluid spring tube 5 not only thickens and absorbs energy, but also has a stabilizing effect.

[0039] The rigid hemispherical block 4 is fixed and supported by the MRF magnetorheological fluid spring tube 5, and there is a cavity structure between the rigid hemispherical block 4 and the spherical groove outer frame 3.

[0040] The rigid hemispherical block 4 and the spherical groove outer frame 3 have a hollow structure, which facilitates the bouncing of the rigid hemispherical block 4.

[0041] The thickness of the ACF artificial cartilage pad 2 is 1.5 to 2.0 cm, and the thickness of the arc-shaped cartilage pad at the bottom of the ACF artificial cartilage pad 2 is 0.5 to 0.8 d.

[0042] The spherical groove outer frame 3 and the rigid hemispherical block 4 are spring-connected by at least 5 MRF magnetorheological fluid spring tubes 5.

[0043] The spherical groove outer frame 3 is fixedly connected by the fixing nail groove 1. The ACF artificial cartilage pad 2 is an impact structure on at least one side. The ACF artificial cartilage pad 2 absorbs 20% to 30% of the sound.

[0044] like Figure 1 - Figure 4 As shown in the figure, the working process of the vibration table noise reduction support based on ACF provided in this embodiment is as follows:

[0045] Step 1: The device combines the energy absorption and sound absorption properties of the ACF artificial cartilage pad 2 with the active current energy consumption function of the MRF magnetorheological fluid 5002. It adopts a double pad arrangement method with partition blocks and sets up MRF magnetorheological fluid spring tubes 5 in four directions. When the vibration table is running, it can reduce noise and protect the instrument. If the vibration table is placed on a platform with low safety, the energy absorption device can also protect the test site to a certain extent.

[0046] Step 2: Artificial Cartilage Foam (ACF) is a biomimetic energy-absorbing material that can directly absorb more than 90% of the impact energy through hysteresis deformation and convert it into low-grade heat energy when impacted.

[0047] Step 3: There are many micron-sized pores inside the material, and there is a certain connection between the pores. This gives the ACF artificial cartilage pad 2 good sound absorption performance. The sound of the vibration table is about 90dB. After the sound absorption of the ACF artificial cartilage pad 2, it can be controlled to within 60dB, which will not affect the normal conversation of laboratory operators.

[0048] Step 4: Magnetorheological Fluid (MRF) is a novel controllable intelligent fluid used for energy absorption. It is formed by near-nanoscale magnetic particles dispersed in a non-magnetic carrier liquid. The MRF magnetorheological fluid 5002 in this device uses carbonyl iron powder with high magnetic saturation as magnetic particles, mineral oil as the base liquid, and adds dispersants to improve the redispersibility of the fluid, so that the prepared magnetorheological fluid has good durability and longer working time.

[0049] Step 5: Place MRF magnetorheological fluid spring tubes at the bottom and around the base, so that the initial stiffness of the spring tubes is just enough to support the hemispherical plate a certain distance.

[0050] Step 6: The rigid hemispherical block 4 is made of lightweight carbon fiber alloy to reduce its own weight and reduce the pressure on the underlying ACF artificial cartilage pad layer at level 2.

[0051] Step 7: The base groove and the plate that directly bears the impact adopt a spherical contact surface to increase the contact area for indirect impacts, while also giving the device a certain fault tolerance performance for eccentric impacts.

[0052] Step 8: The top cartilage pad layer is designed to be 1.5-2.0cm thick, and the bottom arc-shaped cartilage pad layer is designed to be 0.5-0.8cm thick. The distance between the hemispherical block and the base pad layer when there is no impact is 0.

[0053] Step 9: The ACF artificial cartilage pad 2, which directly bears the impact at the top, should coincide with the impact surface at the bottom of the vibration table as much as possible. The two ends of the 5 MRF magnetorheological fluid spring tubes 5 are connected to the base and the rigid hemispherical block 4, respectively.

[0054] Step 10: Connect the MRF magnetorheological fluid spring tube 5 to the power supply of the vibration table. When the vibration table is running, ensure that the MRF magnetorheological fluid spring tube 5 is powered on at the same time, so that the magnetorheological fluid thickens and absorbs energy.

[0055] Step 11: Fixing nail grooves 1 are set at the bottom and around the base for overall fixation. The ACF artificial cartilage pad 2 bears direct and indirect impacts respectively. The MRF magnetorheological fluid spring tube 5 not only thickens and absorbs energy, but also has a stabilizing effect.

[0056] Step 12: The MRF magnetorheological fluid spring tube 5 provides a restoring force to the hemispherical block during the impact gap, causing it to rise again and providing the ACF pad to restore its original shape. Under the same energy absorption conditions, the thickness of the ACF artificial cartilage pad 2 is 1 / 3 or even 1 / 5 of other materials, improving performance by 3 to 5 times. The energy absorption performance reaches 97.8%, and it can withstand multiple impacts. ACF can absorb 20% to 30% of sound, which can control the noise at the level of normal conversation.

[0057] Example 1

[0058] like Figure 1 - Figure 4 As shown, the device combines the energy absorption and sound absorption properties of the ACF artificial cartilage pad 2 with the active current energy dissipation function of the MRF magnetorheological fluid 5002. It employs a double-pad arrangement with spacers and four-way MRF magnetorheological fluid spring tubes 5. During vibration table operation, this reduces noise and protects the instrument. If the vibration table is placed on a less safe platform, the energy absorption device can also protect the test site to some extent. Artificial cartilage foam (ACF) is a biomimetic energy-absorbing material that can directly absorb over 90% of the impact energy through hysteresis deformation and convert it into low-grade heat energy. The material also contains many micron-sized pores with some interconnection, giving the ACF artificial cartilage pad 2 excellent sound absorption performance. The sound from the vibration table, around 90 dB, can be controlled to below 60 dB after absorption by the ACF artificial cartilage pad 2, without affecting normal conversation among laboratory personnel. Magnetorheological fluid... Fluid, or MRF for short, is a novel controllable intelligent fluid for absorbing energy. It is formed by near-nanoscale magnetic particles dispersed in a non-magnetic carrier fluid. The MRF magnetorheological fluid 5002 in this device uses carbonyl iron powder with high magnetic saturation as magnetic particles and mineral oil as the base fluid. Dispersants are added to improve the redispersibility of the fluid, giving the prepared magnetorheological fluid good durability and a longer working time. MRF magnetorheological fluid spring tubes are placed at the bottom and around the base, so that the initial stiffness of the spring tubes is just enough to support the hemispherical plate for a certain distance. The rigid hemispherical block 4 is made of lightweight carbon fiber alloy to reduce its weight and reduce the pressure on the bottom ACF artificial cartilage pad layer.

[0059] The base groove and the plate that directly bears the impact adopt a spherical contact surface to increase the contact area of ​​indirect impact, while giving the device a certain fault tolerance performance for eccentric impact. The top cartilage pad layer is designed to be 1.5 to 2.0 cm thick, and the bottom arc-shaped cartilage pad layer is designed to be 0.5 to 0.8 dd, which is the distance between the hemispherical block and the base pad layer when there is no impact.

[0060] Example 2

[0061] like Figure 1 - Figure 4 As shown, the ACF artificial cartilage pad 2, which directly bears the impact at the top, should coincide with the impact surface at the bottom of the vibration table as much as possible. The two ends of the 5 MRF magnetorheological fluid spring tubes 5 are connected to the base and the rigid hemispherical block 4 respectively. The MRF magnetorheological fluid spring tubes 5 are connected to the power supply of the vibration table. When the vibration table is running, ensure that the MRF magnetorheological fluid spring tubes 5 are energized at the same time, and the magnetorheological fluid thickens and absorbs energy.

[0062] The base is provided with fixing nail grooves 1 at the bottom and around the perimeter for overall fixation. The ACF artificial cartilage pad 2 withstands direct and indirect impacts respectively. The MRF magnetorheological fluid spring tube 5 not only thickens and absorbs energy, but also has a stabilizing effect.

[0063] The MRF magnetorheological fluid spring tube 5 provides a restoring force to the hemispherical block during the impact gap, causing it to rise again and allowing the ACF pad to return to its original shape. Under the same energy absorption conditions, the thickness of the ACF artificial cartilage pad 2 is 1 / 3 or even 1 / 5 of other materials, improving performance by 3 to 5 times. The energy absorption performance reaches 97.8%, and it can withstand multiple impacts. ACF can absorb 20% to 30% of sound, keeping noise levels at the level of normal conversation.

[0064] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A vibration table noise reduction support based on ACF, comprising a spherical groove outer frame for limiting position (3); Its features are: An ACF artificial cartilage pad (2) is laid at the bottom of the spherical groove outer frame (3). An MRF magnetorheological fluid spring tube (5) is coiled and fixed on the spherical groove outer frame (3). A rigid hemispherical block (4) is spring-loaded on the outer end of the MRF magnetorheological fluid spring tube (5). The MRF magnetorheological fluid spring tube (5) is filled with magnetorheological fluid (5002), and a conductor coil (5001) is wound on the MRF magnetorheological fluid spring tube (5).

2. The vibration table noise reduction support based on ACF according to claim 1, characterized in that: The outer frame (3) with spherical groove has fixing nail slots (1) around its perimeter.

3. The vibration table noise reduction support based on ACF according to claim 2, characterized in that: The rigid hemispherical block (4) is fixed and supported by the MRF magnetorheological fluid spring tube (5), and there is a cavity structure between the rigid hemispherical block (4) and the spherical groove outer frame (3).

4. The vibration table noise reduction support based on ACF according to claim 3, characterized in that: The thickness of the ACF artificial cartilage pad (2) is: The thickness of the bottom arc-shaped cartilage pad of the ACF artificial cartilage pad (2) is 0.5-0.8d, which is 1.5-2.0cm.

5. A vibration table noise reduction support based on ACF according to claim 4, characterized in that: The spherical groove outer frame (3) and the rigid hemispherical block (4) are spring-connected by at least 5 MRF magnetorheological fluid spring tubes (5).

6. A vibration table noise reduction support based on ACF according to claim 5, characterized in that: The spherical groove outer frame (3) is fixedly connected by the fixing nail groove (1), the ACF artificial cartilage pad (2) is an impact structure on at least one side, and the ACF artificial cartilage pad (2) absorbs 20% to 30% of the sound.

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