Connecting piece vibration and noise reduction method and device based on vibration absorption superstructure

Abstract

The invention discloses a connecting piece vibration and noise reduction method and device based on a vibration absorption superstructure, and the method comprises the steps: analyzing the vibration condition of a connecting piece between a vibration source and other parts in a vibration system, then carrying out the design of a vibration reduction structure according to the demands, and embedding a proper vibration absorption superstructure in the connecting piece, thereby achieving the vibration reduction of the connecting piece. And the band gap interval of the vibration absorption superstructure covers the target vibration reduction rate. And according to the configuration of the joint of the connecting piece, the metal rubber vibration isolation pad is designed and arranged, and vibration energy is secondarily dissipated. According to the design method, the vibration direction, the transmission path and the vibration frequency are comprehensively evaluated, and the customized vibration absorption superstructure is used for low-frequency vibration reduction, so that efficient vibration suppression of actual equipment can be realized. The low-frequency broadband vibration and noise reduction device has higher engineering equipment practicability and vibration and noise reduction capacity, and can be applied to low-frequency broadband vibration and noise reduction of mechanical equipment with connecting pieces between various main system vibration sources with cylinder equipment as a typical body and other parts.

Description

Technical Field

[0001] The invention belongs to the technical field of structural vibration reduction, and in particular relates to a method and device for reducing vibration and noise of a connector based on a vibration absorbing superstructure. Background Art

[0002] Elastic superstructures are a new type of functional composite structure in the field of low-frequency vibration reduction. With their unique sub-wavelength characteristics and high designability, they can effectively meet the needs of low-frequency vibration reduction while taking into account lightweight requirements. Specifically, a local resonant band gap in a set frequency range can be constructed by artificially designing microstructures, and the elastic wave energy within the range can be suppressed by the bandgap effect, thereby achieving the superstructure vibration reduction effect.

[0003] The superstructure vibration reduction schemes proposed in the past are often mainly attached, that is, the designed vibration-absorbing superstructure is directly attached to the target vibration reduction object, so that when the vibration energy passes through, the energy exchange is realized through the frame components in the vibration-absorbing superstructure to achieve the vibration reduction effect. However, in fact, when facing practical engineering problems, the attached superstructure has high requirements on the surface, external space and environment of the target vibration reduction object, and the mass of the attached structure often needs to reach a certain mass ratio to play an effective role. Therefore, not all objects to be vibration-reduced are suitable for attached vibration reduction structures, and there are limitations in their use. Therefore, it is necessary to develop new vibration reduction methods to achieve broadband vibration reduction effects. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing additional vibration reduction technology. Taking the connectors between the vibration source and the remaining components in various vibration systems as the target objects, a method and device for vibration reduction and noise reduction of connectors based on vibration absorption superstructures are provided, which can be used for low-frequency broadband vibration reduction and noise reduction of various cylinder-type mechanical systems.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: A method for reducing vibration and noise of a connector based on a vibration absorbing superstructure comprises the following steps: 1) Separate the main vibration source of the target vibration reduction object from the remaining components, arrange measurement points on the connection path between the two, i.e., the connecting parts, obtain the vibration acceleration response function of the connection through vibration test, and determine the target vibration reduction peak frequency and main vibration direction; 2) Select the appropriate type of vibration-absorbing superstructure based on the target vibration reduction frequency, the main vibration direction, and the amount of space allowed for the actual connector to be embedded; 3) Based on the selected type of vibration-absorbing superstructure, adjust the structural parameters, calculate the dispersion curve of the vibration-absorbing superstructure, and determine the frequency range of the local resonance band gap so that the target vibration reduction frequency falls within the band gap range; 4) If there are multiple target vibration reduction frequencies, vibration absorption superstructures with multiple parameter specifications are constructed to form a band gap gradient vibration absorption superstructure, so that the target vibration reduction peaks are all covered by the designed band gap; 5) Assemble the designed vibration-absorbing superstructure and the original connector, conduct conformal matching design based on the installation conditions of the target vibration reduction object, embed the vibration-absorbing superstructure into the connector to form a superstructure embedded connector, realize structural integration, and conduct strength verification; 6) Consider the connection configuration between the connector and other components of the target vibration reduction object and design the metal rubber vibration isolation pad; 7) Prepare superstructure embedded connectors and metal rubber vibration isolation pads, connect them with other components of the target vibration reduction object, carry out vibration tests, and verify the vibration reduction and noise reduction effects.

[0006] A further improvement of the present invention is that the connection path between the main vibration source of the target vibration reduction object and other components, namely the connecting piece, is designed to integrate the vibration reduction structure to obtain the best vibration reduction and noise reduction effect.

[0007] A further improvement of the present invention is that it is not necessary to add or place any vibration reduction device outside the target vibration reduction object.

[0008] A further improvement of the present invention is that the embedded vibration absorbing superstructure realizes vibration energy attenuation on the transmission path through the local resonance effect, the band gap is a directional band gap that can attenuate vibration in the main direction, or is a complete band gap, and the band gap frequency range can cover the target vibration reduction frequency.

[0009] A further improvement of the present invention is that the superstructure embedded connector achieves energy isolation on the vibration transmission path by means of vibration absorption, which is a vibration reduction method that replaces isolation with absorption, and attenuates vibration noise induced by vibration.

[0010] A further improvement of the present invention is that the embedded vibration absorbing superstructure is of any type and any band gap frequency range, and broadband vibrations are absorbed by combining vibration absorbing superstructures of different vibration reduction frequency ranges and integrating superstructure embedded connectors.

[0011] A further improvement of the present invention is that the vibration energy is embedded in a vibration absorbing superstructure and arranged in a metal rubber vibration isolation pad on the transmission path, thereby achieving a two-level synergistic vibration reduction effect, wherein the vibration absorbing superstructure absorbs the set frequency and the vibration isolation pad attenuates a specific direction.

[0012] A further improvement of the present invention is that the superstructure embedded connector includes a connector base, a fluororubber sealing ring, an embedded vibration absorbing superstructure and a sealing member; a deep groove is opened inside the connector base, and the embedded vibration absorbing superstructure is assembled with the fluororubber sealing ring and the sealing member.

[0013] A further improvement of the present invention is that the fluororubber sealing ring is assembled in an interference fit manner.

[0014] A device for reducing vibration and noise of a connector based on a vibration absorbing superstructure comprises the following steps: The first confirmation module separates the main vibration source of the target vibration reduction object from the remaining components, arranges measurement points on the connection path between the two, i.e., the connection parts, obtains the vibration acceleration response function of the connection through vibration testing, and determines the target vibration reduction peak frequency and main vibration direction; Selection module, select the appropriate type of vibration absorbing superstructure according to the target vibration reduction frequency, main vibration direction and the space allowed for the actual connection parts to be embedded; The second confirmation module adjusts the structural parameters based on the selected type of vibration absorbing superstructure, calculates the dispersion curve of the vibration absorbing superstructure, and determines the frequency range of the local resonance band gap so that the target vibration reduction frequency falls within the band gap range; A construction module, if there are multiple target vibration reduction frequencies, then a vibration absorption superstructure with multiple parameter specifications is constructed to form a band gap gradient vibration absorption superstructure, so that the target vibration reduction wave peaks are all covered by the designed band gap; The assembly module assembles the designed vibration-absorbing superstructure and the original connector, performs conformal matching design based on the installation conditions of the target vibration reduction object, embeds the vibration-absorbing superstructure into the connector to form a superstructure embedded connector, realizes structural integration, and performs strength verification; Design module, considering the connection configuration between the connector and other components of the target vibration reduction object, and designing the metal rubber vibration isolation pad; Test the module, prepare superstructure embedded connectors and metal rubber vibration isolation pads, connect them with other components of the target vibration reduction object, carry out vibration tests, and test the vibration and noise reduction effects.

[0015] Compared with the prior art, the present invention has at least the following beneficial technical effects: 1. By embedding a vibration-absorbing superstructure on the main vibration connector of the target vibration reduction system, a broadband vibration reduction effect can be achieved and vibration-induced noise can be reduced; 2. Embedding a vibration-absorbing superstructure on the transmission part is equivalent to utilizing the local resonance effect to enhance the damping energy dissipation capacity of the connecting part, thereby improving the vibration reduction capacity of the structure without destroying the strength of the connecting part; 3. Effective attenuation of multiple vibration peaks can be achieved through the integration of embedded vibration-absorbing superstructures of different types and different bandgap frequency ranges; 4. The arranged metal rubber vibration isolation pads can attenuate the vibration energy in a specific direction (vertical direction of the installation plane); 5. It can achieve an ultra-strong broadband vibration attenuation effect of more than 8dB and an efficient noise reduction effect of more than 5dB without increasing or even reducing the original structural mass; In summary, according to the above characteristics of the method for vibration reduction and noise reduction of a connector based on a vibration absorbing superstructure provided by the present invention, the low-frequency vibration reduction and noise reduction scheme provided by the present invention is used in the connectors between the main vibration source of various vibration systems and the remaining components, which can overcome the shortcomings of existing vibration reduction technologies, dissipate the energy and friction loss on the main vibration transmission path, thereby achieving vibration suppression of the main system and further attenuating vibration-induced noise. Since this design method conducts a comprehensive evaluation of the vibration direction, transmission path and vibration frequency, and uses a customized vibration absorbing superstructure for low-frequency vibration reduction, efficient vibration suppression of actual equipment can be achieved. In addition to the efficient vibration reduction effect, the advantages of this device also include effective attenuation of vibration noise, no need to destroy the external layout of the original system, no impact on the structural strength of the original system, and the ability to solve the problem of multiple vibration peaks. Among them, the effective attenuation of vibration noise is reflected in that after the vibration energy is effectively attenuated, the corresponding induced noise will be reduced; there is no need to destroy the external layout of the original system, which is reflected in that the vibration reduction solution is an embedded vibration-absorbing superstructure, and the external space layout of the connector is not changed; it does not affect the structural strength of the original system, which is reflected in that the strength of the connector does not change significantly after the vibration-absorbing superstructure is embedded, and it can still meet the application conditions; it can solve the problem of multiple vibration peaks, which is reflected in that the vibration-absorbing superstructure embedded in the connector can be designed with a gradient band gap and a multi-specification superstructure integrated design. In summary, this vibration reduction and noise reduction method has stronger engineering equipment practicability and vibration reduction and noise reduction capabilities, and can be used for low-frequency broadband vibration reduction and noise reduction of various cylinder-type mechanical systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the initial connections between the actuator and other components of the main system; Figure 2 Schematic diagram of the embedded double-helix slit-type vibration-absorbing superstructure; Figure 3 It is the dispersion curve of gradient vibration absorption superstructure; Figure 4 It is a schematic diagram of the structure of the superstructure embedded connector; Figure 5 This is a cloud diagram of stress distribution of the connector before and after embedding the vibration-absorbing superstructure; Figure 6 is the axial excitation transmission curve of the connector before and after embedding the vibration absorbing superstructure; Figure 7 is the radial excitation transmission curve of the connector before and after embedding the vibration absorbing superstructure; Figure 8 This is a schematic diagram of the structure of the metal rubber vibration isolation pad; Fig. 9 Test results for testing independent connectors before and after embedding in the vibration absorbing superstructure; Fig.10The test results of the acceleration level test of the original actuator system before and after embedding the vibration absorbing superstructure; Fig.11 The test results of the sound pressure level test of the original actuator system before and after embedding the vibration absorbing superstructure; Fig.12 The following are actual sample pictures of the superstructure embedded connector (left) and the metal rubber vibration isolation pad (right). DETAILED DESCRIPTION

[0017] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0018] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0019] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0020] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0021] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0022] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] Example 1 The present invention provides a method for reducing vibration and noise of a connector based on a vibration absorbing superstructure, comprising the following steps: 1) Separate the main vibration source of the target vibration reduction object from the remaining components, arrange measurement points on the connection path between the two, i.e., the connecting parts, obtain the vibration acceleration response function of the connection through vibration test, and determine the target vibration reduction peak frequency and main vibration direction; 2) Select the appropriate type of vibration-absorbing superstructure based on the target vibration reduction frequency, the main vibration direction, and the amount of space allowed for the actual connector to be embedded; 3) Based on the selected type of vibration-absorbing superstructure, adjust the structural parameters, calculate the dispersion curve of the vibration-absorbing superstructure, and determine the frequency range of the local resonance band gap so that the target vibration reduction frequency falls within the band gap range; 4) If there are multiple target vibration reduction frequencies, vibration absorption superstructures with multiple parameter specifications are constructed to form a band gap gradient vibration absorption superstructure, so that the target vibration reduction peaks are all covered by the designed band gap; 5) Assemble the designed vibration-absorbing superstructure and the original connector, conduct conformal matching design based on the installation conditions of the target vibration reduction object, embed the vibration-absorbing superstructure into the connector to form a superstructure embedded connector, realize structural integration, and conduct strength verification; 6) Consider the connection configuration between the connector and other components of the target vibration reduction object and design the metal rubber vibration isolation pad; 7) Prepare superstructure embedded connectors and metal rubber vibration isolation pads, connect them with other components of the target vibration reduction object, carry out vibration tests, and verify the vibration reduction and noise reduction effects.

[0024] In this embodiment, the vibration reduction structure is integratedly designed for the connection path between the main vibration source of the target vibration reduction object and other components, that is, the connecting parts, so as to obtain the best vibration reduction and noise reduction effect.

[0025] In this embodiment, it is not necessary to add or place any vibration reduction device outside the target vibration reduction object.

[0026] In this embodiment, the embedded vibration-absorbing superstructure achieves vibration energy attenuation on the transmission path through the local resonance effect. The band gap is a directional band gap that can attenuate vibration in the main direction, or a complete band gap, and the band gap frequency range can cover the target vibration reduction frequency.

[0027] In this embodiment, the superstructure embedded connector achieves energy isolation on the vibration transmission path by means of vibration absorption, which is a vibration reduction method that replaces isolation with absorption, and attenuates vibration noise induced by vibration.

[0028] In this embodiment, the embedded vibration absorbing superstructure is of any type and any band gap frequency range, and the broadband vibration is absorbed by combining vibration absorbing superstructures with different vibration reduction frequency ranges and integrating superstructure embedded connectors.

[0029] In this embodiment, the vibration energy is embedded in the transmission path of the vibration absorption super structure and the metal rubber vibration isolation pad is arranged, thereby achieving a two-level synergistic vibration reduction effect. The vibration absorption super structure absorbs the set frequency, and the vibration isolation pad attenuates a specific direction.

[0030] Example 2 The present invention provides a vibration reduction and noise reduction device for a connector based on a vibration absorption superstructure, comprising: The first confirmation module separates the main vibration source of the target vibration reduction object from the remaining components, arranges measurement points on the connection path between the two, i.e., the connection parts, obtains the vibration acceleration response function of the connection through vibration testing, and determines the target vibration reduction peak frequency and main vibration direction; Selection module, select the appropriate type of vibration absorbing superstructure according to the target vibration reduction frequency, main vibration direction and the space allowed for the actual connection parts to be embedded; The second confirmation module adjusts the structural parameters based on the selected type of vibration absorbing superstructure, calculates the dispersion curve of the vibration absorbing superstructure, and determines the frequency range of the local resonance band gap so that the target vibration reduction frequency falls within the band gap range; A construction module, if there are multiple target vibration reduction frequencies, then a vibration absorption superstructure with multiple parameter specifications is constructed to form a band gap gradient vibration absorption superstructure, so that the target vibration reduction wave peaks are all covered by the designed band gap; The assembly module assembles the designed vibration-absorbing superstructure and the original connector, performs conformal matching design based on the installation conditions of the target vibration reduction object, embeds the vibration-absorbing superstructure into the connector to form a superstructure embedded connector, realizes structural integration, and performs strength verification; Design module, considering the connection configuration between the connector and other components of the target vibration reduction object, and designing the metal rubber vibration isolation pad; Test the module, prepare superstructure embedded connectors and metal rubber vibration isolation pads, connect them with other components of the target vibration reduction object, carry out vibration tests, and test the vibration and noise reduction effects.

[0031] Example 3 1. Design of superstructure embedded connector structure As an implementation case, the connection between a certain actuator and the system is selected as the target design object, such as Figure 1 As shown in the figure, in actual equipment, the actuator connected to the upper end of the connector is the main vibration source of the system, and the vibration energy is transmitted to other parts of the system through the connector. Therefore, the connector is taken as the target design object, and the vibration energy on other parts of the system can be reduced through the structural vibration reduction design of the connector. The measuring points are arranged on the connector, and the target vibration reduction frequency in the low frequency band is determined to be 40Hz and 200Hz through vibration test. On this basis, the 30~300Hz frequency band is selected to construct the embedded vibration absorption superstructure.

[0032] The embedded vibration absorbing superstructure can be of any type. In this case, a double-helix slit type vibration absorbing superstructure is selected as the embedded vibration absorbing superstructure type, such as Figure 2 By adjusting the structural parameters, a series of gradient bandgap vibration absorption superstructures can be designed to fully cover the target vibration reduction frequency band. The specific performance dispersion curve is shown in Figure 3 As shown. During use, the vibration-absorbing superstructures with gradient band gap distribution can be used in coordination to achieve broadband vibration reduction through the band gap superposition effect. Then, the embedded vibration-absorbing superstructure and the connector matrix need to be designed to conformally match, as shown in the following example. Figure 4 As shown, the superstructure embedded connector is obtained, which mainly includes four parts: connector base 1, fluororubber sealing ring 2, embedded vibration absorbing superstructure 3 and sealing member 4. A deep groove is opened in the connector base 1, and the embedded vibration absorbing superstructure 3 is assembled with the fluororubber sealing ring 2 and the sealing member 4. Among them, the fluororubber sealing ring 2 needs to be assembled in an interference fit manner.

[0033] After the design is completed, it is necessary to perform strength checks on the superstructure embedded connectors to ensure the reliability and safety of the structural design. Using the commercial finite element software COMSOL, the strength results calculated are as follows: Figure 5 As shown, a and b are the stress distribution of the original connector and the super-structured embedded connector, respectively. It can be seen that after "super-structuring", the concentrated stress of the connector is transferred to the surface of the seal, and its maximum stress is 182MPa, which is 2.5 times the original maximum stress of 72.3MPa, but still lower than the yield strength of the structural material (316 steel) of 220MPa. In this regard, it can be judged that the connector after super-structuring still meets the strength requirements and will not affect actual use.

[0034] The vibration reduction simulation analysis of the designed superstructure embedded connector is carried out, and the axial and radial transmission curve results are as follows: Figure 6 , 7 As shown. It can be seen that both radial and axial vibration energy have been significantly attenuated. From the transmission perspective, the axial transmission is attenuated by an average of 23.4dB in the vibration range of 10-500Hz, and the radial transmission is attenuated by an average of 18.1dB. Compared with the original connector, it can be seen that the attenuation effect in the radial direction is improved by an average of 3.4dB in the vibration frequency range of 10-500Hz, and the axial direction is improved by an average of 3.2dB, which reflects a good vibration attenuation effect and illustrates the vibration reduction reliability of the super-structure embedded connector.

[0035] Finally, considering the geometric configuration of the connector at the connection, a metal rubber vibration isolation pad 5 with corresponding structural characteristics is designed, as shown in the following figure: Figure 8The metal rubber vibration isolation pad 5 is mainly formed into a specific shape by molding a certain wire diameter, and utilizes the friction and extrusion between the metal wires to dissipate the energy in the transmission process, especially the vertical vibration of the action surface.

[0036] 2. Performance verification of superstructure embedded connectors The performance test of the embedded connector of the super structure was carried out. In this case, vibration test tests were carried out under two working conditions, one was a performance test of the independent connector, and the other was a vibration test in the original cylinder system.

[0037] The test results of independent connector performance test are as follows: Fig. 9 As shown, it can be seen that for axial excitation vibration, the test group can achieve a more obvious vibration reduction effect in the range of 20~140Hz compared with the control group, with an average attenuation of about 2~3dB, and an attenuation effect of nearly 25dB can be achieved near 35Hz; and the axial vibration in the wide frequency range of 200~500Hz also shows a very good vibration absorption effect, and an average vibration attenuation effect of about 10dB can be achieved. For radial vibration, since the attenuation ability of the thin plate type vibration absorption superstructure used for radial vibration is relatively ordinary, the attenuation effect is not as obvious as that of axial vibration, but it can also achieve an average attenuation effect of about 3dB, and the vibration reduction effect is good.

[0038] The vibration test results of the original cylinder system are as follows: Fig.10 , 11 As shown, it can be seen that the superstructure embedded connector provides a very good vibration and noise reduction effect. For the vibration acceleration signal, in the low-frequency broadband range of 10~500Hz, the average attenuation level reaches 8.2dB; for the sound signal, the peak sound pressure level is attenuated by 5dB, which fully demonstrates that the superstructure embedded connector provided by the present invention can effectively reduce noise while achieving efficient vibration reduction.

[0039] According to the above data, it can be seen that the technical effects that the present invention can achieve are as follows: 1. By embedding a vibration-absorbing superstructure on the main vibration connector of the target vibration reduction system, a broadband vibration reduction effect can be achieved and vibration-induced noise can be reduced; 2. Embedding a vibration-absorbing superstructure on the transmission part is equivalent to utilizing the local resonance effect to enhance the damping energy dissipation capacity of the connecting part, thereby improving the vibration reduction capacity of the structure without destroying the strength of the connecting part; 3. Effective attenuation of multiple vibration peaks can be achieved through the integration of embedded vibration-absorbing superstructures of different types and different bandgap frequency ranges; 4. The arranged metal rubber vibration isolation pads can attenuate the vibration energy in a specific direction (vertical direction of the installation plane); 5. It can achieve an ultra-strong broadband vibration attenuation effect of more than 8dB and an efficient noise reduction effect of more than 5dB without increasing or even reducing the original structural mass; In summary, according to the above characteristics of the method for vibration reduction and noise reduction of a connector based on a vibration absorbing superstructure provided by the present invention, the low-frequency vibration reduction and noise reduction scheme provided by the present invention is used in the connectors between the main vibration source of various vibration systems and the remaining components, which can overcome the shortcomings of existing vibration reduction technologies, dissipate the energy and friction loss on the main vibration transmission path, thereby achieving vibration suppression of the main system and further attenuating vibration-induced noise. Since this design method conducts a comprehensive evaluation of the vibration direction, transmission path and vibration frequency, and uses a customized vibration absorbing superstructure for low-frequency vibration reduction, efficient vibration suppression of actual equipment can be achieved. In addition to the efficient vibration reduction effect, the advantages of this device also include effective attenuation of vibration noise, no need to destroy the external layout of the original system, no impact on the structural strength of the original system, and the ability to solve the problem of multiple vibration peaks. Among them, the effective attenuation of vibration noise is reflected in that after the vibration energy is effectively attenuated, the corresponding induced noise will be reduced; there is no need to destroy the external layout of the original system, which is reflected in that the vibration reduction solution is an embedded vibration-absorbing superstructure, and the external space layout of the connector is not changed; it does not affect the structural strength of the original system, which is reflected in that the strength of the connector does not change significantly after the vibration-absorbing superstructure is embedded, and it can still meet the application conditions; it can solve the problem of multiple vibration peaks, which is reflected in that the vibration-absorbing superstructure embedded in the connector can be designed with a gradient band gap and a multi-specification superstructure integrated design. In summary, this vibration reduction and noise reduction method has stronger engineering equipment practicability and vibration reduction and noise reduction capabilities, and can be used for low-frequency broadband vibration reduction and noise reduction of various cylinder-type mechanical systems.

[0040] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0041] In addition, it should be understood that although this specification is described in accordance with the implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution according to the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A method for reducing vibration and noise of a connector based on a vibration absorbing superstructure, characterized in that: The following steps are involved: 1) Separate the main vibration source of the target vibration reduction object from the remaining components, arrange measurement points on the connection path between the two, i.e., the connecting parts, obtain the vibration acceleration response function of the connection through vibration test, and determine the target vibration reduction peak frequency and main vibration direction; 2) Select the appropriate type of vibration-absorbing superstructure based on the target vibration reduction frequency, the main vibration direction, and the amount of space allowed for the actual connector to be embedded; 3) Based on the selected type of vibration-absorbing superstructure, adjust the structural parameters, calculate the dispersion curve of the vibration-absorbing superstructure, and determine the frequency range of the local resonance band gap so that the target vibration reduction frequency falls within the band gap range; 4) If there are multiple target vibration reduction frequencies, vibration absorption superstructures with multiple parameter specifications are constructed to form a band gap gradient vibration absorption superstructure, so that the target vibration reduction peaks are all covered by the designed band gap; 5) Assemble the designed vibration-absorbing superstructure and the original connector, conduct conformal matching design based on the installation conditions of the target vibration reduction object, embed the vibration-absorbing superstructure into the connector to form a superstructure embedded connector, realize structural integration, and conduct strength verification; 6) Consider the connection configuration between the connector and other components of the target vibration reduction object and design the metal rubber vibration isolation pad; 7) Prepare superstructure embedded connectors and metal rubber vibration isolation pads, connect them with other components of the target vibration reduction object, carry out vibration tests, and verify the vibration reduction and noise reduction effects.

2. A method for reducing vibration and noise of connectors based on a vibration absorbing superstructure according to claim 1, characterized in that: The vibration reduction structure is integratedly designed for the connection path between the main vibration source of the target vibration reduction object and other components, i.e., the connecting parts, to obtain the best vibration reduction and noise reduction effect.

3. The method for reducing vibration and noise of a connector based on a vibration absorbing superstructure according to claim 1, characterized in that: There is no need to attach or place any vibration reduction device outside the target vibration reduction object.

4. The method for reducing vibration and noise of a connector based on a vibration absorbing superstructure according to claim 1, characterized in that: The embedded vibration-absorbing superstructure achieves vibration energy attenuation on the transmission path through the local resonance effect. The band gap is a directional band gap that can attenuate vibration in the main direction, or a complete band gap, and the band gap frequency range can cover the target vibration reduction frequency.

5. The method for reducing vibration and noise of a connector based on a vibration absorbing superstructure according to claim 1, characterized in that: The superstructure embedded connector achieves energy isolation on the vibration transmission path by absorbing vibrations. It is a vibration reduction method that uses absorption instead of isolation, and attenuates the vibration noise induced by vibrations.

6. The method for reducing vibration and noise of a connector based on a vibration absorbing superstructure according to claim 1, characterized in that: The embedded vibration absorbing superstructure is of any type and any band gap frequency range. By combining vibration absorbing superstructures with different vibration reduction frequency ranges and integrating superstructure embedded connectors, broadband vibrations can be absorbed.

7. The method for reducing vibration and noise of a connector based on a vibration absorbing superstructure according to claim 1, characterized in that: The vibration energy is transmitted by embedding a vibration-absorbing superstructure and arranging metal rubber vibration isolation pads, achieving a two-level synergistic vibration reduction effect. The vibration-absorbing superstructure absorbs the set frequency, and the vibration isolation pad attenuates a specific direction.

8. The method for reducing vibration and noise of a connector based on a vibration absorbing superstructure according to claim 1, characterized in that: A superstructure embedded connector comprises a connector base (1), a fluororubber sealing ring (2), an embedded vibration absorbing superstructure (3) and a sealing member (4); a deep groove is formed in the connector base (1), and the embedded vibration absorbing superstructure (3) is assembled in cooperation with the fluororubber sealing ring (2) and the sealing member (4).

9. A method for reducing vibration and noise of a connector based on a vibration absorbing superstructure according to claim 8, characterized in that: The fluororubber sealing ring (2) is assembled by means of interference fit.

10. A vibration and noise reduction device for a connector based on a vibration absorbing superstructure, characterized in that: include: The first confirmation module separates the main vibration source of the target vibration reduction object from the remaining components, arranges measurement points on the connection path between the two, i.e., the connection parts, obtains the vibration acceleration response function of the connection through vibration testing, and determines the target vibration reduction peak frequency and main vibration direction; Selection module, select the appropriate type of vibration absorbing superstructure according to the target vibration reduction frequency, main vibration direction and the space allowed for the actual connection parts to be embedded; The second confirmation module adjusts the structural parameters based on the selected type of vibration absorbing superstructure, calculates the dispersion curve of the vibration absorbing superstructure, and determines the frequency range of the local resonance band gap so that the target vibration reduction frequency falls within the band gap range; A construction module, if there are multiple target vibration reduction frequencies, then a vibration absorption superstructure with multiple parameter specifications is constructed to form a band gap gradient vibration absorption superstructure, so that the target vibration reduction wave peaks are all covered by the designed band gap; The assembly module assembles the designed vibration-absorbing superstructure and the original connector, performs conformal matching design based on the installation conditions of the target vibration reduction object, embeds the vibration-absorbing superstructure into the connector to form a superstructure embedded connector, realizes structural integration, and performs strength verification; Design module, considering the connection configuration between the connector and other components of the target vibration reduction object, and designing the metal rubber vibration isolation pad; Test the module, prepare superstructure embedded connectors and metal rubber vibration isolation pads, connect them with other components of the target vibration reduction object, carry out vibration tests, and test the vibration and noise reduction effects.

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