A vibration isolation and energy dissipation device composed of reverse-handed frame units

Abstract

The present invention discloses a vibration isolation and energy dissipation device composed of a backhanded frame unit, and relates to the field of energy dissipation and vibration reduction. It includes a top plate and a bottom plate, and a multi-layer backhanded frame assembly is vertically arranged between the top plate and the bottom plate, and each layer of the backhanded frame assembly includes a plurality of backhanded frame units closely arranged in a matrix; adjacent backhanded frame units are fixedly connected; a rubber cylinder with closed ends is vertically arranged at the center position of each backhanded frame unit, and a plurality of concentric flow-isolating cylinders of different diameters are arranged in the rubber cylinder, and each flow-isolating cylinder is evenly provided with a plurality of flow grooves, and the flow grooves of adjacent flow-isolating cylinders are staggered; the rubber cylinder is filled with magnetorheological fluid, and also includes a plurality of springs evenly distributed on the outer wall of the axial side of the rubber cylinder, and one end of each spring is fixedly connected to the rubber cylinder, and the other end is fixedly connected to the inner wall of the backhanded frame unit. The device of the present invention has the advantages of broadband vibration reduction, high-efficiency energy dissipation, and automatic reset.

Description

Technical Field

[0001] The invention relates to the field of energy dissipation and vibration reduction, and in particular to a vibration isolation and energy dissipation device composed of reverse-handed frame units. Background Art

[0002] In daily life, most of the materials we encounter are positive Poisson's ratio materials, that is, the materials shrink laterally when stretched and expand laterally when compressed. Negative Poisson's ratio materials are just the opposite, specifically, the materials expand longitudinally when stretched and shrink longitudinally when compressed. Therefore, negative Poisson's ratio materials have the characteristics of impact resistance, vibration isolation, and energy absorption, which makes them have great application prospects in aerospace, automobile and other fields. Studies have shown that the negative Poisson's ratio effect is usually caused by the cooperative effect between the internal structure (geometric setting) of the material and the deformation mechanism it experiences when subjected to stress. The chiral / anti-chiral structure is one of several common negative Poisson's ratio structures. The chiral / anti-chiral structure is divided into chiral and anti-chiral structures. Chirality means that the object and the mirror image object cannot overlap.

[0003] Long-term vibration loads can cause irreversible damage to structures, and earthquake loads may cause structures to fail or even collapse. my country has a vast territory, and earthquakes have occurred frequently in the northwest, Yunnan, Guizhou, Sichuan, and the Qinghai-Tibet Plateau in recent years. The damage caused by vibration has attracted more and more attention in the fields of roads, bridges, high-rise buildings, and mechanical equipment. The damage caused by vibration cannot be ignored, but existing anti-vibration energy-dissipating devices often have disadvantages such as irreversibility, high cost, and limited anti-vibration effect. Summary of the invention

[0004] In order to solve the above technical problems, the main purpose of the present invention is to provide a vibration isolation and energy dissipation device composed of a reverse-handed frame unit, which utilizes the superior vibration isolation and vibration suppression characteristics of the negative Poisson's ratio reverse-handed metamaterial and combines it with magneto-variable materials and rubber materials, so that the structure can effectively suppress the propagation of elastic waves when it is under load, thereby creating a composite vibration isolation and energy dissipation device that can achieve wide-band vibration reduction, self-reset, easy installation, and adjustable damping.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions.

[0006] A vibration isolation and energy dissipation device composed of backhanded frame units comprises a top plate and a bottom plate, wherein a plurality of backhanded frame components are arranged between the top plate and the bottom plate, wherein each layer of the backhanded frame components comprises a plurality of backhanded frame units closely arranged in a matrix; adjacent backhanded frame units are fixedly connected; the upper end of each backhanded frame unit at the top is fixedly connected to the lower surface of the top plate, and the lower end of each backhanded frame unit at the bottom is fixedly connected to the upper surface of the bottom plate; a rubber cylinder with closed ends is vertically arranged at the center position of each backhanded frame unit, wherein a plurality of flow-isolating cylinders with different diameters and concentric with the rubber cylinder are arranged in the rubber cylinder, wherein each flow-isolating cylinder is uniformly provided with a plurality of vertical flow slots, and the flow slots of adjacent flow-isolating cylinders are staggered; a magnetorheological fluid is injected into the rubber cylinder, and the device further comprises a plurality of springs uniformly distributed on the outer wall of the axial side of the rubber cylinder, wherein one end of each spring is fixedly connected to the rubber cylinder, and the other end is fixedly connected to the inner wall of the backhanded frame unit.

[0007] Furthermore, a piezoelectric sheet is provided between the upper end of each rubber cylinder and the anti-chiral frame unit, and a piezoelectric sheet is provided between the lower end of each rubber cylinder and the anti-chiral frame unit; a coil is spirally wound around the outside of each rubber cylinder, and the upper and lower ends of the coil are respectively connected to the upper and lower piezoelectric sheets to form a closed loop in series.

[0008] Furthermore, the backhandedness frame unit comprises six hollow circular square plates of the same structure, and the six circular square plates together form a cubic frame; a circular ring whose axis is coplanar with the circular square plate is arranged at the center of each circular square plate, and the circular ring and the circular square plate are fixedly connected by four short columns, and the six circular square plates, the six circular rings and the four short columns together form a negative Poisson's ratio backhandedness structure; the upper end of the piezoelectric sheet at the upper end of the rubber cylinder in each of the backhandedness frame units is fixedly connected to the lower surface of the circular ring in the circular square plate at the top of the backhandedness frame unit; the lower end of the piezoelectric sheet at the lower end of the rubber cylinder in each of the backhandedness frame units is fixedly connected to the upper surface of the circular ring in the circular square plate at the bottom of the backhandedness frame unit.

[0009] Furthermore, four springs are distributed on the upper side of each rubber cylinder, and four springs are also evenly distributed on the bottom.

[0010] Furthermore, the materials of the top plate, the bottom plate, the rubber cylinder, and the reverse-handed frame unit are all rubber; and the material of the spring is magnetically controlled memory alloy.

[0011] Furthermore, the number of the flow-isolating cylinders is three, and each of the flow-isolating cylinders is evenly provided with four vertical flow grooves.

[0012] The technical solution of the present invention utilizes the superior vibration isolation and vibration suppression characteristics of negative Poisson's ratio anti-chirality metamaterials, and combines them with magneto-variable materials and rubber materials, so that the structure can effectively suppress the propagation of elastic waves when bearing loads, creating a composite vibration isolation and energy dissipation device that can achieve wide-band vibration reduction, self-reset, easy installation, and adjustable damping. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of a partial cross-sectional structure of the present invention from a front side perspective;

[0015] Figure 2 It is a schematic diagram of a specific cross-sectional structure of the present invention from a front side perspective;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the backhanded frame unit of the present invention from the front side perspective;

[0017] Figure 4 It is a schematic diagram of a partial cross-sectional structure of a backhanded frame unit of the present invention from a front side perspective;

[0018] Figure 5 It is a schematic diagram of a partial cross-sectional structure of a reverse-handed frame unit of the present invention from a top view;

[0019] Figure 6 Schematic diagram of the unfolded structure of the reverse chiral framework unit of the present invention;

[0020] Figure 7 It is a schematic diagram of the internal cross-sectional structure of the rubber cylinder of the present invention from a top view.

[0021] In the above figure: 1. top plate; 2. bottom plate; 3. backhand frame assembly; 4. backhand frame unit; 41. circular square plate; 42. circular ring; 43. short column; 5. rubber cylinder; 6. flow-isolating cylinder; 7. flow slot; 8. magnetorheological fluid; 9. spring; 10. piezoelectric sheet; 11. coil. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the following description, specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] refer to Figure 1 and Figure 3 A vibration isolation and energy dissipation device composed of backhanded frame units, comprising a top plate 1 and a bottom plate 2, wherein a plurality of backhanded frame components 3 are vertically arranged between the top plate 1 and the bottom plate 2, wherein each layer of the backhanded frame components 3 comprises a plurality of backhanded frame units 4 closely arranged in a matrix; adjacent backhanded frame units 4 are fixedly connected; the upper end of each top backhanded frame unit 4 is fixedly connected to the lower surface of the top plate 1, and the lower end of each bottom backhanded frame unit 4 is fixedly connected to the upper surface of the bottom plate 2; Figure 1 and Figure 5 As shown, a rubber cylinder 5 with closed ends is vertically arranged at the center of each of the reverse-handed frame units 4. Figure 7 As shown, a plurality of flow-isolating cylinders 6 having different diameters and being concentric with the rubber cylinder 5 are arranged inside the rubber cylinder 5, and each of the flow-isolating cylinders 6 is evenly provided with a plurality of vertical flow grooves 7, and the flow grooves 7 of adjacent flow-isolating cylinders 6 are staggered; Figure 4 and Figure 5 As shown, the rubber cylinder 5 is filled with magnetorheological fluid 8, which does not fill up the rubber cylinder 5. The rubber cylinder 5 also includes a plurality of springs 9 evenly distributed on the axial outer wall of the rubber cylinder 5. One end of each of the springs 9 is fixedly connected to the rubber cylinder 5, and the other end is fixedly connected to the inner wall of the anti-chiral frame unit 4.

[0025] In the above embodiments, after being subjected to external vibration load, the top plate 1 and the bottom plate 2 deform and consume energy, and then transmit the vibration load to each anti-chiral frame unit 4, so that each anti-chiral frame unit 4 is twisted and compressed to the inside to consume energy. At the same time, due to the deformation of the anti-chiral frame unit 4, the distance between it and the rubber cylinder 5 becomes smaller, causing the spring 9 connecting the two to be squeezed and deformed to consume energy. At this time, the magnetorheological fluid 8 at the end of the rubber cylinder 5 will flow along the flow groove 7 and contact with each inner wall of the isolation cylinder 6. There is a flow friction between the two, which further increases the energy consumption. The spring 9 resets and then drives the overall structure to reset. The present invention utilizes the superior vibration isolation and vibration suppression characteristics of negative Poisson's ratio anti-chiral metamaterials, and combines them with magnetorheological materials and rubber materials, so that the structure can effectively suppress the propagation of elastic waves when bearing loads, creating a composite vibration isolation and energy dissipation device that can achieve broadband vibration reduction, easy installation, and high damping.

[0026] Further, refer to Figure 1, Figure 2 and Figure 3 A piezoelectric sheet 10 is provided between the upper end of each rubber cylinder 5 and the anti-chiral frame unit 4, and a piezoelectric sheet 10 is provided between the lower end of each rubber cylinder 5 and the anti-chiral frame unit 4; a coil 11 is spirally wound around the outside of each rubber cylinder 5, and the upper and lower ends of the coil 11 are respectively connected to the upper and lower piezoelectric sheets 10 to form a closed loop connected in series.

[0027] In the above embodiment, the piezoelectric sheet 10 at the end of the rubber cylinder 5 is subjected to the pressure generated by the deformation of the anti-chiral frame unit 4, converting the mechanical energy into electrical energy, so that the current is transmitted to the coil 11. According to the law of electromagnetic induction, a magnetic field is generated around the energized coil 11, causing the viscosity of the magnetorheological fluid 8 inside the rubber cylinder 5 to increase and the temperature to rise, thereby increasing the friction between the multi-layer arc-shaped baffles inside the rubber cylinder 5 under the influence of vibration, further increasing the energy consumption.

[0028] Further, refer to Figure 1 , Figure 2 and Figure 6 The backhandedness frame unit 4 comprises six hollow circular square plates 41 of the same structure, and the six circular square plates 41 together form a cubic frame; a circular ring 42 whose axis is coplanar with the circular square plate 41 is arranged at the center of each circular square plate 41, and the circular ring 42 and the circular square plate 41 are fixedly connected by four short columns 43, and the six circular square plates 41, the six circular rings 42 and the four short columns 43 together form a negative Poisson's ratio backhandedness structure; the upper end of the piezoelectric sheet 10 at the upper end of the rubber cylinder 5 in each of the backhandedness frame units 4 is fixedly connected to the lower surface of the circular ring 42 in the circular square plate 41 at the top of the backhandedness frame unit 4; the lower end of the piezoelectric sheet 10 at the lower end of the rubber cylinder 5 in each of the backhandedness frame units 4 is fixedly connected to the upper surface of the circular ring 42 in the circular square plate 41 at the bottom of the backhandedness frame unit 4.

[0029] In the above embodiments, .

[0030] Further, refer to Figure 1 , Figure 3 and Figure 5 Each of the rubber cylinders 5 has four springs 9 distributed on the upper side and four springs 9 evenly distributed on the bottom.

[0031] In the above embodiments, a stable connection with the rubber cylinder 5 can be achieved.

[0032] Further, refer to Figure 1 The materials of the top plate 1, the bottom plate 2, the rubber cylinder 5, and the anti-chiral frame unit 4 are all rubber; the material of the spring 9 is a magnetically controlled memory alloy.

[0033] In the above embodiments, the material of the top plate 1, the bottom plate 2, the rubber cylinder 5 and the anti-chiral frame unit 4 is rubber, which can achieve deformation and has a high deformation recovery force. By limiting the material of the spring 9 to be a magnetically controlled memory alloy, the generation of the magnetic field will affect the spring 9 made of the magnetically controlled memory alloy material, causing it to reset, and then driving the overall structure to reset.

[0034] Furthermore, the number of the flow-isolating cylinders 6 is three, and each of the flow-isolating cylinders 6 is evenly provided with four vertical flow grooves 7 .

[0035] Compared with the existing shock absorber, the advantages of the present invention are:

[0036] The present invention utilizes the superior vibration isolation and suppression characteristics of negative Poisson's ratio backhanded metamaterials and the deformation characteristics of backhanded structure expansion and compression, so that the structure can effectively suppress the propagation of elastic waves when bearing loads, and by adjusting the internal structural dimensions and quantity of the backhanded frame, the overall stiffness of the structure can be changed in a planned manner, thereby achieving adjustable damping;

[0037] By converting the external vibration load into electrical energy, the structure as a whole generates a magnetic field and the magnetic field strength changes with the deformation of the structure, thereby changing the states of the magnetorheological fluid 8 and the spring 9 of the magnetic control memory alloy at the same time, which not only amplifies the anti-vibration energy dissipation effect, but also restores the structural deformation to the state before the load;

[0038] The present invention combines the anti-vibration energy dissipation effects of the negative Poisson's ratio anti-chirality frame, the magneto-variable material and the rubber material, thereby better reducing vibration energy.

[0039] Although the present invention has been described in detail in this specification by means of general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made thereto on the basis of the present invention. Therefore, these modifications or improvements made without departing from the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A vibration isolation and energy dissipation device composed of a reverse-handed frame unit, comprising a top plate (1) and a bottom plate (2), characterized in that: A multi-layer reverse-handed frame assembly (3) is vertically arranged between the top plate (1) and the bottom plate (2); Each layer of the backhanded frame assembly (3) comprises a plurality of backhanded frame units (4) closely arranged in a matrix, and adjacent backhanded frame units (4) are fixedly connected; the upper end of each backhanded frame unit (4) at the top is fixedly connected to the lower surface of the top plate (1), and the lower end of each backhanded frame unit (4) at the bottom is fixedly connected to the upper surface of the bottom plate (2); A rubber cylinder (5) with closed ends is vertically arranged at the center of each of the reverse-handed frame units (4); a plurality of flow-isolating cylinders (6) concentric with the rubber cylinder (5) and having different diameters are arranged in the rubber cylinder (5); each of the flow-isolating cylinders (6) is evenly provided with a plurality of vertical flow grooves (7); and the flow grooves (7) of adjacent flow-isolating cylinders (6) are staggered; and a magnetorheological fluid (8) is injected into the rubber cylinder (5); It also includes a plurality of springs (9) evenly distributed on the outer wall of the axial side of the rubber cylinder (5), one end of each of the springs (9) is fixedly connected to the rubber cylinder (5), and the other end is fixedly connected to the inner wall of the reverse hand frame unit (4); A piezoelectric sheet (10) is provided between the upper end of each rubber cylinder (5) and the anti-chiral frame unit (4), and a piezoelectric sheet (10) is provided between the lower end of each rubber cylinder (5) and the anti-chiral frame unit (4); A coil (11) is spirally wound around the outside of each rubber cylinder (5), and the upper and lower ends of the coil (11) are respectively connected to the upper and lower piezoelectric sheets (10) to form a series closed loop; The reverse-handed frame unit (4) comprises six hollow circular square plates (41) of the same structure, and the six circular square plates (41) together form a cubic frame; A circular ring (42) coplanar with the circular ring (41) on the same side is arranged at the center of each circular square plate (41); the circular ring (42) and the circular square plate (41) are fixedly connected via four short columns (43); the six circular square plates (41), the six circular rings (42) and the four short columns (43) together form a negative Poisson's ratio backhanded structure; The upper end of the piezoelectric sheet (10) at the upper end of the rubber cylinder (5) in each of the anti-chiral frame units (4) is fixedly connected to the lower surface of the circular ring (42) in the circular square plate (41) at the top of the anti-chiral frame unit (4), and the lower end of the piezoelectric sheet (10) at the lower end of the rubber cylinder (5) in each of the anti-chiral frame units (4) is fixedly connected to the upper surface of the circular ring (42) in the circular square plate (41) at the bottom of the anti-chiral frame unit (4); Each of the rubber cylinders (5) has four springs (9) distributed on the upper side and four springs (9) evenly distributed on the bottom; The materials of the top plate (1), the bottom plate (2), the rubber cylinder (5), and the reverse-handed frame unit (4) are all rubber; and the material of the spring (9) is a magnetically controlled memory alloy.

2. According to the vibration isolation and energy dissipation device composed of reverse-handed frame units as described in claim 1, the number of the flow isolation cylinders (6) is three, and each of the flow isolation cylinders (6) is evenly provided with four vertical flow grooves (7).

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