Annular vibration reduction and isolation device with negative Poisson's ratio damping loss

Abstract

The utility model relates to an annular vibration reduction and isolation device with negative Poisson's ratio damping loss. The annular vibration reduction and isolation device comprises a framework structure and a wrapping structure used for wrapping the framework structure. The framework structure is of a metal annular structure and comprises a plurality of vibration reduction and isolation parts and connecting plate bodies used for connecting the adjacent vibration reduction and isolation parts. The multiple vibration reduction and isolation parts are annularly distributed at equal intervals. The coating structure is a rubber annular structure with a hollow part, and the shape of the hollow part of the coating structure is matched with the shape of the skeleton structure; the vibration reduction and isolation part is of a negative Poisson's ratio vibration reduction and isolation structure. Based on the special mechanical property of the skeleton structure and in combination with the damping characteristic of rubber materials, the vibration energy dissipation structure has a convenient connection mode, the whole structure is light, the structural strength is better, the vibration energy dissipation characteristic is good, and the vibration energy dissipation structure has a good engineering application prospect.

Description

Technical Field

[0001] The utility model relates to the field of vibration control, in particular to an annular vibration isolator with negative Poisson's ratio damping loss. Background Art

[0002] Vibration control technology plays a vital role in the field of equipment manufacturing. It can improve the accuracy of various equipment, extend the service life, and reduce noise. Traditional vibration reduction and isolation measures usually rely on a large amount of materials and space, which increases the weight and volume of the system, and is not conducive to the miniaturization and lightweight requirements of equipment. In addition, the mechanical properties of these measures are poor, and it is difficult to maintain optimal performance under different working conditions, which affects the overall reliability and flexibility of the equipment. In order to effectively suppress the vibration of various types of equipment, the design of vibration reduction and isolation structures with both mechanical properties is of great significance to ensure the durability of equipment and improve the combat effectiveness of equipment.

[0003] Negative Poisson's ratio structures are special material structures that expand laterally when stretched, rather than contracting like ordinary materials. This unique property gives negative Poisson's ratio structures many advantages in the field of vibration reduction and isolation. First, they can provide higher energy absorption and scattering capabilities, effectively reducing vibration transmission. Second, these structural materials are usually lighter, which can reduce the weight of the overall system. Third, negative Poisson's ratio structures have better deformation capabilities and can effectively isolate vibration in multiple directions. In addition, they can maintain good vibration reduction effects over a wider frequency range, improving the stability and reliability of the system.

[0004] Rubber materials have many significant advantages in vibration reduction and isolation applications, such as high elasticity, excellent damping performance and wide frequency response range, but they also have some disadvantages, such as temperature dependence, aging problems and limited load-bearing capacity. Therefore, in practical applications, it is necessary to comprehensively consider its performance characteristics and specific application environment, such as forming a composite material with a metal structure to take into account both strength and high damping characteristics. Utility Model Content

[0005] The utility model aims to provide an annular vibration isolator with negative Poisson's ratio damping loss.

[0006] To achieve the above-mentioned utility model object, the utility model provides an annular vibration isolator with negative Poisson's ratio damping loss, comprising: a skeleton structure, a coating structure for coating the skeleton structure;

[0007] The skeleton structure is a metal ring structure, which includes: a plurality of vibration reduction and isolation parts, and a connecting plate body used to connect adjacent vibration reduction and isolation parts;

[0008] The plurality of vibration reduction and isolation parts are distributed in an annular manner at equal intervals;

[0009] The coating structure is a rubber ring structure with a hollow portion, and the shape of the hollow portion of the coating structure matches the shape of the skeleton structure;

[0010] The vibration reduction and isolation part is a negative Poisson's ratio vibration reduction and isolation structure.

[0011] According to one aspect of the utility model, the vibration reduction and isolation part is a negative Poisson's ratio metal ring;

[0012] Along the axial direction of the annular vibration isolator, internal threaded holes are respectively provided on opposite sides of the vibration isolating part;

[0013] The covering structure is provided with connecting vias corresponding to the internal threaded holes.

[0014] According to one aspect of the utility model, the vibration reduction and isolation part includes: two symmetrical vibration reduction and isolation components;

[0015] The vibration reduction and isolation assembly is in the shape of a trapezoid with an open top and bottom.

[0016] The two vibration reduction and isolation components are connected to each other at the open ends to form a symmetrical annular structure;

[0017] The internal threaded hole is arranged at the middle position of the lower bottom of the vibration reduction and isolation assembly.

[0018] According to one aspect of the utility model, the vibration reduction and isolation assembly includes: a first plate body and a second plate body;

[0019] The first plate is used to form the lower bottom of the vibration reduction and isolation assembly;

[0020] The second plates are respectively arranged at two opposite ends of the first plate along the length direction of the first plate;

[0021] The two second plates are arranged on the same side of the first plate, wherein one end of the second plate is connected to the first plate, and the other end is inclined in a direction away from the first plate and close to each other.

[0022] According to one aspect of the utility model, a regular boss is provided on one side of the first plate;

[0023] The regular boss and the second plate are located on the same side of the first plate;

[0024] The internal threaded hole passes through the first plate body and the regular boss.

[0025] According to one aspect of the utility model, the end of the connecting plate body is fixedly connected to the position where the two vibration reduction and isolation components in the vibration reduction and isolation part are connected.

[0026] According to one aspect of the utility model, a mass block is arranged at a middle position of the connecting plate body along the length direction of the connecting plate body.

[0027] According to one aspect of the utility model, along the axial direction of the annular vibration isolator, the mass blocks are symmetrically arranged on opposite sides of the connecting plate body.

[0028] According to one aspect of the utility model, the connecting plate body is an arc-shaped plate;

[0029] Along the radial direction of the annular vibration damper and isolator, two opposite sides of the vibration damping and isolating part are cambered surfaces.

[0030] According to one aspect of the utility model, the covering structure is mechanically fixedly connected, bonded or hot-melt welded to the skeleton structure.

[0031] According to a scheme of the utility model, the utility model has a convenient connection method based on the special mechanical properties of the skeleton structure and combined with the damping characteristics of the rubber material. The entire structure is lightweight and has good structural strength, has good dissipation characteristics for vibration energy, and has good engineering application prospects.

[0032] According to one solution of the utility model, the annular vibration isolator of the utility model adopts a composite material composed of a metal negative Poisson's ratio damping skeleton and a rubber damping material. Among them, the negative Poisson's ratio damping skeleton is used to connect two structures that need vibration disconnection through the provided internal threaded holes. Therefore, the negative Poisson's ratio damping skeleton provides sufficient strength without destroying the mechanical properties of the overall structure. Moreover, due to the unique mechanical properties of the negative Poisson's ratio damping skeleton, the waveform conversion of the elastic wave is enhanced, so that the transverse wave formed by the waveform conversion is quickly dissipated in the rubber damping coating layer, thereby enhancing the dissipation of vibration energy.

[0033] According to a solution of the utility model, the skeleton structure of the utility model can realize flexible molding of the annular vibration isolator through the combined connection mode of the vibration reduction and isolation part and the connecting plate body, and can be assembled accordingly based on different installation needs, thereby conveniently expanding the application scope of the utility model.

[0034] According to a solution of the utility model, the annular vibration isolator of the utility model has excellent mechanical properties such as tensile resistance, shear resistance, and torsion resistance, and does not cause structural damage under complex working conditions.

[0035] According to a solution of the utility model, the annular vibration isolator of the utility model has a clear connection method, which can realize rapid assembly and integration; wherein the provided skeleton structure can block the propagation of elastic waves, causing them to dissipate rapidly in the rubber coating layer, and has good engineering application value.

[0036] According to a solution of the utility model, the annular vibration isolator of the utility model is connected to other structures by threaded connection through a skeleton structure, which can effectively ensure the vibration reduction and isolation performance, mechanical performance and assembly simplicity of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a structural diagram schematically showing a skeleton structure according to an embodiment of the utility model;

[0038] Figure 2 is a structural diagram schematically showing a coating structure according to an embodiment of the present utility model;

[0039] Figure 3 is a partial cross-sectional view schematically showing an annular vibration isolator according to an embodiment of the utility model;

[0040] Figure 4 is a structural diagram schematically showing a skeleton structure according to another embodiment of the present utility model;

[0041] Figure 5 is a partial cross-sectional view schematically showing an annular vibration isolator according to another embodiment of the utility model;

[0042] Figure 6 is a schematic diagram showing an outer ring of a coating structure according to an embodiment of the present utility model;

[0043] Figure 7 is a schematic diagram of an inner circle of a coating structure according to an embodiment of the present utility model;

[0044] Figure 8 Schematically shows the connection and mechanical performance analysis diagram of an annular vibration isolator and a shaft sleeve according to an embodiment of the present invention, wherein (a) shows the connection structure diagram of the annular vibration isolator and the shaft sleeve, (b) shows the tensile performance analysis diagram of the annular vibration isolator; (c) shows the shear performance analysis diagram of the annular vibration isolator; (d) shows the torsional performance analysis diagram of the annular vibration isolator;

[0045] Fig. 9 The diagram schematically shows a comparison of the vibration reduction performance of an annular vibration isolator according to an embodiment of the utility model and a pure metal ring. DETAILED DESCRIPTION

[0046] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the drawings required for the implementation are briefly introduced below. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0047] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0048] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. The implementation methods cannot be described one by one here, but the implementation methods of the present invention are not therefore limited to the following implementation methods.

[0049] Combination Figure 1 , Figure 2 and Figure 3 As shown, according to an embodiment of the utility model, an annular vibration isolator with negative Poisson's ratio damping loss of the utility model comprises: a skeleton structure 1, and a coating structure 2 for coating the skeleton structure 1; in this embodiment, the skeleton structure 1 is a metal annular structure, which comprises: a plurality of vibration reduction and isolation parts 11, and a connecting plate body 12 for connecting adjacent vibration reduction and isolation parts 11; wherein the plurality of vibration reduction and isolation parts 11 are distributed at equal intervals along the annular shape. In this embodiment, the coating structure 2 is a rubber annular structure with a hollow portion, and the shape of the hollow portion of the coating structure 2 is matched with the shape of the skeleton structure 1. In this embodiment, the vibration reduction and isolation part 11 is a negative Poisson's ratio vibration reduction and isolation structure.

[0050] Combination Figure 1 , Figure 2 and Figure 3 As shown, according to an embodiment of the present invention, the vibration reduction and isolation part 11 is a negative Poisson's ratio metal ring; wherein, along the axial direction of the annular vibration reduction and isolation device, internal threaded holes are respectively provided on opposite sides of the vibration reduction and isolation part 11. In this embodiment, the covering structure 2 is provided with connecting holes corresponding to the internal threaded holes.

[0051] Combination Figure 1 , Figure 2 and Figure 3As shown, according to an embodiment of the utility model, the vibration reduction and isolation part 11 includes: two symmetrical vibration reduction and isolation components 111. In this embodiment, the vibration reduction and isolation component 111 is a trapezoidal structure with an open upper bottom as a whole; wherein the two vibration reduction and isolation components 111 are connected to each other based on the open ends to form a symmetrical annular structure. In this embodiment, the internal threaded hole is set in the middle position of the lower bottom of the vibration reduction and isolation component 111.

[0052] Combination Figure 1 , Figure 2 and Figure 3 As shown, according to an embodiment of the present invention, the vibration reduction and isolation assembly 111 includes: a first plate 111a and a second plate 111b; wherein the first plate 111a is used to form the lower bottom of the vibration reduction and isolation assembly 111. In this embodiment, along the length direction of the first plate 111a, the second plate 111b is respectively arranged at the opposite ends of the first plate 111a; wherein the two second plates 111b are arranged on the same side of the first plate 111a, wherein one end of the second plate 111b is connected to the first plate 111a, and the other end is arranged obliquely in a direction away from the first plate 111a and close to each other.

[0053] Combination Figure 1 , Figure 2 and Figure 3 As shown, according to an embodiment of the utility model, a regular boss 111a1 is provided on one side of the first plate 111a; wherein the regular boss 111a1 and the second plate 111b are on the same side of the first plate 111a. In this embodiment, the regular boss 111a1 can be provided as a cylindrical boss, and the regular boss 111a1 is provided coaxially with the internal threaded hole. In this embodiment, the internal threaded hole passes through the first plate 111a and the regular boss 111a1.

[0054] Through the above-mentioned arrangement, by providing a regular boss 111a1 on one side of the first plate body 111a, the axial length of the internal threaded hole can be effectively increased, thereby conveniently achieving stable connection with other structures. In addition, the structure of the first plate body 111a can be strengthened by the regular boss 111a1, so that the structural strength of the first plate body 111a is optimized, so that the vibration can be conveniently transferred to the second plate body 111b during the vibration reduction and isolation process, so that the vibration reduction and isolation effect of the entire vibration reduction and isolation part 11 is better. In addition, by providing the regular boss 111a1, the mass distribution on the vibration reduction and isolation component 111 can be effectively changed, so that the overall spacing effect of the formed vibration reduction and isolation part 11 is better.

[0055] Combination Figure 1 , Figure 2 and Figure 3As shown, according to one embodiment of the present invention, the end of the connecting plate body 12 is fixedly connected to the position where the two vibration reduction and isolation components 111 in the vibration reduction and isolation part 11 are connected. In this embodiment, the connecting plate body 12 can be welded to achieve the position fixation of the connection with the two vibration reduction and isolation components 111, so as to achieve reliable and stable connection.

[0056] Through the above arrangement, the connection plate 12 is used to connect the symmetrical positions of adjacent vibration reduction and isolation parts 11, which can effectively suppress the influence of adjacent vibration reduction and isolation parts 11, which is beneficial to ensuring the stable use of the annular vibration reduction and isolation structure of the utility model.

[0057] Combination Figure 4 and Figure 5 As shown, according to an embodiment of the present invention, a mass block 121 is provided at the middle position of the connecting plate body 12 along the length direction of the connecting plate body 12. When controlling the vibration in the low frequency range, the mass block can be made of a material with a high density (such as a metal material), and when controlling the vibration in the high frequency range, a material with a low density (such as a rubber material) can be selected.

[0058] Through the above-mentioned arrangement, by setting the mass block 121 in the middle position of the connecting plate body 12, during the vibration of the vibration reduction and isolation part 11, the set mass block 121 can form a spring-mass system with the connecting plate body 12 to further dissipate the vibration energy, which is more beneficial to suppressing the influence of the adjacent vibration reduction and isolation part 11.

[0059] Combination Figure 4 and Figure 5 As shown, according to an embodiment of the present invention, along the axial direction of the annular vibration isolator, the mass blocks 121 are symmetrically arranged on two opposite sides of the connecting plate body 12 .

[0060] Through the above arrangement, by respectively arranging the mass blocks 121 on the opposite sides of the connecting plate body 12, it is more beneficial to improve the vibration reduction and isolation performance of the utility model.

[0061] like Figure 1 As shown, according to one embodiment of the present invention, the connecting plate body 12 is an arc-shaped plate, and along the radial direction of the annular vibration isolator, the width of the connecting plate body 12 is arranged to be consistent with the width of the vibration isolating part 11. Furthermore, along the radial direction of the annular vibration isolator, the opposite sides of the vibration isolating part 11 are arc surfaces.

[0062] Combination Figure 1 , Figure 2 and Figure 3As shown, according to an embodiment of the present invention, the coating structure 2 is mechanically fixedly connected, bonded or hot-melt welded to the skeleton structure 1. In this embodiment, if the coating structure 2 is mechanically fixedly connected to the skeleton structure 1, the coating structure 2 can be fixed to the skeleton structure 1 by threaded connection to ensure reliable installation of the coating structure 2; if the coating structure 2 is bonded to the skeleton structure 1, chemical bonding, vulcanization bonding or thermosetting plastic bonding are used to achieve connection, so as to achieve simple and reliable installation of the coating structure 2.

[0063] To further illustrate this solution, further examples are given.

[0064] Example 1

[0065] Combination Figure 1 , Figure 2 and Figure 3 The annular vibration isolator comprises: a skeleton structure 1 and a covering structure 2; wherein the skeleton structure 1 can be made by 3D metal printing, and the internal thread on the vibration isolating part 11 is formed by machining.

[0066] Combination Figure 6 and Figure 7 As shown, the coating structure 2 is coated on the skeleton structure 1 by processing the inner ring and the outer ring separately, and then the inner ring and the outer ring are connected by glue, thereby forming the annular vibration isolator of this embodiment.

[0067] like Figure 8 As shown in (a), taking the vibration suppression between the sleeves as an example, the annular vibration isolator of the utility model is arranged between the two sleeves, wherein the sleeve and the annular vibration isolator are connected by threaded connection, thereby, the vibration transmission can be mainly sleeve-bolt-negative Poisson's ratio metal ring-bolt-sleeve. The material parameters of the provided embodiment are shown in Table 1.

[0068] Table 1

[0069]

[0070]

[0071] Furthermore, in order to demonstrate the stability of the structure of this embodiment, a mechanical performance analysis was conducted, and an axial tension of 2500N, a shear force of 1250N, and a torque of 2600N / m were applied to one of the sleeves. Figure 8 (b) is the displacement cloud diagram of the utility model structure when it is subjected to tension, and the maximum deformation is 14×10 -6 m; Figure 8 (c) is the displacement cloud diagram of the utility model structure when it is subjected to shear force, and the maximum displacement is 35×10 -6m; Figure 8 (d) is the displacement cloud diagram of the utility model structure when subjected to torque, and the maximum displacement is 14×10 -4 m; In summary, the utility model structure has excellent mechanical properties, and does not produce structural damage or destructive trends under large forces and moments, which is in line with practical engineering applications.

[0072] Furthermore, the shaft sleeve at one end is excited, and then the frequency response of the shaft sleeve at the other end is picked up to evaluate the vibration suppression effect of the utility model structure. The characterization formula of the frequency response is as follows:

[0073]

[0074] Among them, ut, vt, wt represent the acceleration along the x, y, and z axes respectively, and a0 = 10 -6 m / s 2 is the reference acceleration value.

[0075] Furthermore, the frequency responses of two structures were calculated respectively, one of which was the annular vibration damper of the utility model, and the other was the control group. The control group and the annular vibration damper of the utility model had the same equivalent mass and were pure metal ring connection structures. The frequency response calculation results of the two structures are shown in Figure 2. Fig. 9 As shown, the control group has more response peaks in the analysis frequency band, and the magnitude is larger, and the loss of energy transfer is smaller. Compared with the control structure, the structure of the utility model has an overall larger peak attenuation, with a vibration attenuation of nearly 60dB at certain characteristic frequencies, and the response peaks in the medium and high frequency bands are all attenuated, showing the obvious vibration reduction and isolation advantages of the structure of the utility model.

[0076] In summary, the technical effects of the utility model are as follows:

[0077] 1. Compared with traditional vibration reduction and isolation materials, the annular vibration reduction and isolation device of the utility model has a small additional mass and excellent structural mechanical properties, and can be applied to vibration reduction and isolation requirements under various complex working conditions. The connecting threads provided by the skeleton structure 1 are conducive to overall consistent installation and ensure the overall mechanical properties of the equipment.

[0078] 2. Based on the waveform conversion effect of the negative Poisson's ratio and the high damping dissipation capacity of the rubber material, it has good performance in vibration suppression under omnidirectional excitation, which means that the annular vibration isolator of the utility model has a dissipation effect on elastic waves in multiple directions and can more effectively improve the stability of the equipment.

[0079] 3. The annular vibration isolator of the utility model has the characteristics of highly adjustable materials and geometric dimensions, can be adjusted according to actual application conditions, and has good engineering application value.

[0080] The above contents are merely examples of specific solutions of the present invention. For the equipment and structures not described in detail, it should be understood that they are implemented by adopting the general equipment and general methods available in the art.

[0081] The above is only one solution of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A ring-shaped vibration isolator with negative Poisson's ratio damping loss, characterized in that: include: A skeleton structure (1), and a coating structure (2) for coating the skeleton structure (1); The skeleton structure (1) is a metal ring structure, comprising: a plurality of vibration reduction and isolation parts (11), and a connecting plate body (12) for connecting adjacent vibration reduction and isolation parts (11); The plurality of vibration reduction and isolation parts (11) are distributed in an annular shape at equal intervals; The coating structure (2) is a rubber ring structure having a hollow portion, and the shape of the hollow portion of the coating structure (2) is matched with the shape of the skeleton structure (1); The vibration reduction and isolation part (11) is a negative Poisson's ratio vibration reduction and isolation structure.

2. The annular vibration isolator according to claim 1, characterized in that: The vibration reduction and isolation part (11) is a negative Poisson's ratio metal ring; In the axial direction of the annular vibration isolator, internal threaded holes are respectively arranged on opposite sides of the vibration isolating part (11); The covering structure (2) is provided with a connecting through hole corresponding to the internal threaded hole.

3. The annular vibration isolator according to claim 2, characterized in that: The vibration reduction and isolation part (11) comprises: two symmetrical vibration reduction and isolation components (111); The vibration reduction and isolation component (111) is in the form of a trapezoidal structure with an open top and bottom. The two vibration reduction and isolation components (111) are connected to each other at their open ends to form a symmetrical annular structure; The internal threaded hole is arranged at a middle position of the lower bottom of the vibration reduction and isolation component (111).

4. The annular vibration isolator according to claim 3, characterized in that: The vibration reduction and isolation assembly (111) comprises: a first plate body (111a) and a second plate body (111b); The first plate body (111a) is used to form the lower bottom of the vibration reduction and isolation component (111); Along the length direction of the first plate body (111a), the second plate body (111b) is respectively arranged at two opposite ends of the first plate body (111a); The two second plates (111b) are arranged on the same side of the first plate (111a), wherein one end of the second plate (111b) is connected to the first plate (111a), and the other end is inclined in a direction away from the first plate (111a) and approaching each other.

5. The annular vibration isolator according to claim 4, characterized in that: A regular boss (111a1) is provided on one side of the first plate body (111a); The regular boss (111a1) and the second plate body (111b) are located on the same side of the first plate body (111a); The internal threaded hole penetrates the first plate body (111a) and the regular boss (111a1).

6. The annular vibration isolator according to claim 5, characterized in that: The end of the connecting plate body (12) is fixedly connected to a position where two vibration reduction and isolation components (111) are connected in the vibration reduction and isolation part (11).

7. The annular vibration isolator according to claim 6, characterized in that: A mass block (121) is provided at a middle position of the connecting plate body (12) along the length direction of the connecting plate body (12).

8. The annular vibration isolator according to claim 7, characterized in that: Along the axial direction of the annular vibration isolator, the mass blocks (121) are symmetrically arranged on two opposite sides of the connecting plate body (12).

9. The annular vibration isolator according to claim 8, characterized in that: The connecting plate body (12) is an arc-shaped plate; Along the radial direction of the annular vibration damper, two opposite sides of the vibration damper (11) are arc surfaces.

10. The annular vibration isolator according to claim 9, characterized in that: The coating structure (2) and the skeleton structure (1) are mechanically fixedly connected, bonded or hot-melt welded.

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