Magnetic control self-adaptive particle compound pipeline suppressor and pipeline vibration suppression method
By designing a magnetically controlled adaptive particle composite pipe suppressor, which combines a particle damper and a magnetorheological elastomer vibration absorber, efficient suppression of wide-frequency vibration is achieved. This solves the shortcomings of existing dampers in the wide frequency range and improves the versatility and economy of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING UNIV
- Filing Date
- 2026-01-21
- Publication Date
- 2026-04-10
AI Technical Summary
Existing dampers cannot effectively suppress pipeline vibration over a wide frequency range, and traditional tuned mass dampers cannot adapt to changes in operating conditions. Magnetorheological dampers rely on external energy and cannot achieve multi-directional coordinated control.
A magnetically controlled adaptive particle composite pipe suppressor is adopted. Through the composite encapsulation of particle damper and magnetorheological elastomer vibration absorber, combined with damping energy dissipation, friction energy dissipation and stiffness tuning vibration reduction mechanism, the damping force and stiffness are adjusted by magnetic field to achieve coordinated control of broadband vibration.
It efficiently dissipates energy over a wide frequency range, improving the equipment's versatility and economy. It can adapt to complex pipeline vibration under varying operating conditions, has a compact structure for easy deployment, and offers multiple operating modes covering a wider frequency range.
Smart Images
Figure CN121828533A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pipeline vibration control technology, and in particular to a magnetically controlled adaptive particle composite pipeline suppressor and a pipeline vibration suppression method. Background Technology
[0002] Vibration generated during fluid transport is a common and critical issue in industrial pipeline systems, affecting not only equipment lifespan but also potential safety hazards. As modern industry demands higher transport efficiency and pressure ratings from pipeline systems, the impact of vibration sources such as fluid pulsation, turbulence, and equipment resonance is amplified. This can lead to loosening of pipe joints, structural fatigue cracking, and even interference with the normal operation of surrounding precision equipment, failing to meet the stringent safety and stability standards of the industrial sector.
[0003] In related technologies, dampers are used to reduce the impact of pipeline vibration. However, while passive particulate dampers offer wide bandwidth advantages, their damping is uncontrollable, and their suppression effect on specific frequencies is limited. Traditional tuned mass dampers, due to their fixed parameters, cannot adapt to changes in operating conditions. Magnetorheological dampers, while providing controllability, are mostly limited to single materials, generally rely on external energy sources, and cannot achieve multi-directional coordinated control. Therefore, developing pipeline suppressors with wide-band vibration reduction capabilities, flexible installation, and adaptability to different vibration directions has become a key direction for solving industrial pipeline vibration problems and ensuring the long-term reliable operation of the system, possessing significant engineering application value. Summary of the Invention
[0004] To address or partially address the problems existing in related technologies, this application provides a magnetically controlled adaptive particle composite pipe suppressor and a pipe vibration suppression method, which can effectively solve the industrial pipe vibration problem under broadband conditions.
[0005] The first aspect of this application provides a magnetically controlled adaptive particle composite pipeline suppressor, including a particle damper, a magnetic field generating module, a magnetorheological elastomer vibration absorber, an encapsulation shell, and a vibration control and detection unit; The encapsulation shell is installed on the outer wall of the target pipe to encapsulate the particle damper, the magnetorheological elastomer vibration absorber and the magnetic field generating module, and to provide the shell to protect the internal structure. The vibration control and detection unit is installed on the outside of the encapsulation shell and is electrically connected to the magnetic field generating module. The vibration control and detection unit is used to detect whether the pipeline is vibrating and to control the magnetic field generating module to generate a magnetic field of corresponding intensity according to the vibration amplitude and frequency. The particle damper is used to adjust the damping force and friction of the internal medium in real time according to the strength of the magnetic field, thereby dissipating the vibration energy of the target pipeline. The magnetorheological elastomer vibration absorber is connected to the particle damper and is used to adjust its stiffness in real time according to the strength of the magnetic field, so that its natural frequency matches the vibration frequency of the pipeline, and cancels the excitation force of the target pipeline through resonant coupling. As one implementation of the first aspect, the particle damper includes a multi-chamber particle damper, an upper magnetic cover, and a lower magnetic cover; The multi-chamber particle damper, the upper magnetic cover, and the lower magnetic cover all have a central through hole, and the central through holes of the multi-chamber particle damper, the upper magnetic cover, and the lower magnetic cover are connected. The multi-chamber particle damper is internally divided into multiple chambers by a non-magnetic partition, and the internal medium filled in the chambers is magnetorheological fluid and magnetic damping particles. The magnetorheological fluid is used to adjust the damping force in real time according to the change of magnetic field, and the magnetic damping particles are used to adjust the friction force in real time according to the change of magnetic field. The upper magnetic cover is installed on the top of the multi-chamber particle damper to seal the multi-chamber particle damper; The lower magnetic cover is installed at the bottom of the multi-chamber particle damper to seal the multi-chamber particle damper.
[0006] As one implementation of the first aspect, the magnetic field generating module includes a magnetic core and a coil; The magnetic core is installed inside the central through hole of the particle damper. The coil is mounted around the magnetic core and is used to receive the excitation signal sent by the vibration control and detection unit, and works together with the magnetic core to generate a magnetic field.
[0007] As one implementation of the first aspect, the magnetorheological elastomer vibration absorber includes a top magnetic end cap, a first vibration absorber, and a second vibration absorber. The top magnetic end cap is connected to the top of the first vibration absorber and the outer wall of the second vibration absorber; The bottom end of the first vibration absorber is connected to the upper magnetic cover, and the inner wall of the second vibration absorber is connected to the magnetic core; The first and second vibration absorbers are used to adjust their own stiffness according to the strength of the magnetic field to absorb the energy of pipeline vibration and suppress the vibration amplitude of the pipeline.
[0008] As one implementation of the first aspect, the encapsulation housing includes a magnetic disk, a mass block, a non-magnetic housing, a non-magnetic base, and a pipe collar; The mass block is installed on the top of the top magnetic end cap and acts as a mover to counteract the excitation force of the target pipe when the target pipe vibrates. The non-magnetic base is installed at the bottom of the magnetic disk; The particle damper and the magnetic field generating module are mounted on the top of the magnetically conductive disk; The non-magnetic outer shell is connected to the non-magnetic base; The pipe collar is fixedly connected to the non-magnetic base and is used to install the magnetically controlled adaptive particle composite pipe suppressor on the outer wall of the target pipe.
[0009] As one implementation of the first aspect, the vibration control and detection unit includes a vibration sensor, a magnetic field control module, a magnetic field drive module, and a power supply module; The vibration sensor is electrically connected to the magnetic field control module and is used to detect the vibration signal of the target pipeline in real time and send it to the magnetic field control module. The magnetic field control module is electrically connected to the magnetic field drive module and is used to calculate the target magnetic field strength based on the vibration signal, and generate a magnetic field control command based on the target magnetic field strength and send it to the magnetic field drive module. The magnetic field driving module is electrically connected to the magnetic field generating module and is used to convert the output current of the power module into an excitation signal according to the magnetic field control command, and drive the magnetic field generating module to generate a magnetic field of a corresponding degree.
[0010] As one implementation of the first aspect, the multi-chamber particle damper is electrically connected to the power module; Triboelectric modules are installed on the inner walls of the multi-chamber particle damper and the inner walls of the non-magnetic partition. The triboelectric modules are used to convert the energy generated by the collision with the magnetic damping particles into electrical energy and input it into the power module for storage.
[0011] As one implementation of the first aspect, the vibration control detection unit further includes a mode switching module, which is electrically connected to the magnetic field control module; The mode switching module is used to receive mode switching commands from the outside world, and when triggered by the mode switching command, it sends the pre-stored control parameters to the magnetic field control module. The magnetic field control module is also used to generate magnetic field control commands based on the control parameters and send them to the magnetic field drive module.
[0012] A second aspect of this application provides a method for suppressing pipeline vibration, comprising: Acquire vibration signals from the target pipeline; Generating magnetic field control commands based on the vibration signals; A magnetic field is generated upon triggering the magnetic field control command; The vibration of the target pipeline is suppressed by adjusting the damping force and friction of the magnetic field-controlled particle damper and the stiffness of the magnetorheological elastomer vibration absorber.
[0013] As one implementation of the second aspect, the generation of magnetic field control commands based on the vibration signal includes: The vibration frequency of the target pipeline is identified based on the vibration signal. Call the control parameters corresponding to the current working mode according to the current working mode; Based on the control parameters, determine the required damping force, friction force, and stiffness of the magnetorheological elastomer vibration absorber to suppress the vibration of the target pipeline, and determine the required current to generate the magnetic field. The magnetic field control command is generated based on the required current.
[0014] The technical solution provided in this application can include the following beneficial effects: by combining the particle damper and the magnetorheological elastomer vibration absorber into a composite package, a triple collaborative control mechanism combining damping energy dissipation, friction energy dissipation, and stiffness tuning vibration reduction is constructed. This mechanism enables mutual supplementation and collaborative work under different pipeline vibration conditions, ensuring that extremely high energy dissipation efficiency is maintained under a wide range of vibrations from minor vibrations to strong impacts. Furthermore, by adjusting the stiffness and damping by regulating the magnetic field, tracking and tuning vibration reduction of a wide range of vibrations are achieved. This mechanism can better cope with complex pipeline vibrations under varying operating conditions, improving the versatility and economy of the equipment. At the same time, all functional modules are integrated and packaged, resulting in a compact structure that is easy to deploy on industrial pipelines with limited space.
[0015] Furthermore, by making simple mechanical adjustments to the magnetorheological elastomer vibration absorber, the magnetically controlled adaptive particle composite pipe suppressor can have multiple working modes, respectively optimizing the vibration reduction performance in the mid-high frequency and low frequency bands. This allows a single suppressor to cover a wider frequency range, improving its ability to cope with complex pipe vibration spectra and enhancing the versatility and economy of the magnetically controlled adaptive particle composite pipe suppressor.
[0016] Meanwhile, the initial electrical energy pre-charged and stored in the power module, or the initial charging of the triboelectric module initiated by the initial environmental vibration, ensures the self-starting of the magnetically controlled adaptive particle composite pipeline suppressor and improves the initial vibration suppression effect.
[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0018] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.
[0019] Figure 1 This is a schematic diagram of the structure of the magnetically controlled adaptive particle composite pipeline suppressor shown in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of a multi-chamber particle damper shown in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the vibration control and detection unit shown in the embodiments of this application; Figure 4 This is a flowchart illustrating the pipeline vibration suppression method in the embodiments of this application; Figure 5 This is a flowchart illustrating the generation of magnetic field control instructions in an embodiment of this application.
[0020] Symbol Explanation: 1-Pipe collar; 2-Non-magnetic base; 3-Magnetic disk; 4-Multi-chamber particle damper; 5-First vibration absorber; 6-Magnetic core; 7-Coil; 8-Upper magnetic cover; 9-Lower magnetic cover; 10-Top magnetic end cap; 11-Mass block; 12-Non-magnetic outer shell; 13-Non-magnetic partition; 14-Magnetic damping particle; 15-Second vibration absorber; 16-Vibration sensor; 17-Magnetic field control module; 18-Magnetic field drive module; 19-Power supply module; 20-Mode switching module; 21-Triboelectric module. Detailed Implementation
[0021] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.
[0022] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0023] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0024] As modern industry continues to demand higher efficiency and pressure ratings from pipeline systems, the vibrations generated during fluid transport in industrial pipeline systems can cause loosening of pipe joints, structural fatigue cracking, and even interference with the normal operation of surrounding precision equipment. This does not meet the stringent safety and stability standards of the industrial sector. Existing damper vibration reduction equipment cannot controllably suppress the amplitude of pipeline vibration over a wide frequency range.
[0025] To address the aforementioned issues, this application provides a magnetically controlled adaptive particle composite pipe suppressor that can be flexibly installed on pipes with different vibration directions and effectively suppresses the vibration amplitude of the pipe within a wide frequency range.
[0026] This application provides a magnetically controlled adaptive particle composite pipeline suppressor, including a particle damper, a magnetic field generating module, a magnetorheological elastomer vibration absorber, a packaged shell, and a vibration control and detection unit.
[0027] The encapsulation housing is installed on the outer wall of the target pipe to encapsulate the particle damper, magnetorheological elastomer vibration absorber and magnetic field generating module, and to provide the housing to protect the internal structure.
[0028] The vibration control and detection unit is installed on the outside of the encapsulated housing and is electrically connected to the magnetic field generating module. The vibration control and detection unit is used to detect whether the pipeline is vibrating, and controls the magnetic field generating module to generate a magnetic field of corresponding intensity according to the vibration amplitude and frequency.
[0029] Particle dampers are used to adjust the damping force and friction of the internal medium in real time according to the strength of the magnetic field, thereby dissipating the vibration energy of the target pipeline.
[0030] The magnetorheological elastomer vibration absorber is connected to the particle damper and is used to adjust its own stiffness in real time according to the strength of the magnetic field so that the natural frequency matches the vibration frequency of the pipeline and cancels the excitation force of the target pipeline through resonant coupling.
[0031] When the pipeline resonates under external excitation, the magnetorheological elastomer vibration absorber will dynamically interact with the magnetically controlled adaptive particle composite pipeline suppressor through the magnetorheological elastomer, and counteract the excitation force of the target pipeline through resonant coupling.
[0032] Specifically, four magnetically controlled adaptive particle composite pipe suppressors are installed around the target pipe and interconnected through a housing, forming a 360° surround. During use, the multiple magnetically controlled adaptive particle composite pipe suppressors dissipate the vibration energy and excitation force of the target pipe from multiple directions, achieving multi-directional synergistic vibration reduction.
[0033] In this embodiment, by combining a particle damper and a magnetorheological elastomer vibration absorber into a composite package, a triple collaborative control mechanism is constructed that combines damping energy dissipation, friction energy dissipation, and stiffness tuning vibration reduction. This mechanism enables mutual supplementation and collaborative operation under different pipeline vibration conditions, ensuring extremely high energy dissipation efficiency under a wide range of vibrations, from minor vibrations to strong impacts. Furthermore, by adjusting the stiffness and damping through the magnetic field, tracking and tuning vibration reduction of a wide range of vibrations are achieved. This mechanism can effectively cope with complex pipeline vibrations under varying operating conditions, improving the versatility and economy of the equipment. At the same time, all functional modules are integrated and packaged, resulting in a compact structure that facilitates deployment on space-constrained industrial pipelines.
[0034] In the embodiments of this application, the particle damper includes a multi-chamber particle damper 4, an upper magnetic cover 8, and a lower magnetic cover 9. The specific structure of the particle damper is as follows: Figure 1 As shown.
[0035] The multi-chamber particle damper 4, the upper magnetic cover 8, and the lower magnetic cover 9 all have a central through hole, and the central through holes of the multi-chamber particle damper 4, the upper magnetic cover 8, and the lower magnetic cover 9 are connected.
[0036] The multi-chamber particle damper 4 is divided into multiple chambers by a non-magnetic partition 13. The internal medium of the chambers is magnetorheological fluid and magnetic damping particles 14.
[0037] Among them, the magnetorheological fluid is used to adjust the damping force in real time according to the change of magnetic field, and the magnetic damping particles 14 are used to adjust the friction force in real time according to the change of magnetic field.
[0038] Specifically, in the absence of a magnetic field, the particle damper relies on the frictional force and momentum dissipation generated by the collision of magnetically damped particles 14 to dissipate the vibrational energy of the target pipeline.
[0039] When a magnetic field is applied, the magnetorheological fluid undergoes a rapid phase change, transforming from a liquid to a semi-solid state according to the magnetic field strength. The apparent viscosity increases, the damping force of the magnetorheological fluid increases, and the magnetic damping particles 14 are bound by the semi-solid magnetorheological fluid matrix. The energy dissipation mechanism changes from the random collision of the magnetic damping particles 14 to the forced shear deformation and slippage of the chains / clusters of the magnetic damping particles 14 in the viscoplastic matrix. Based on the damping force of the magnetorheological fluid and the frictional force generated by the chains / clusters of the magnetic damping particles 14 during the movement, the vibration energy of the target pipeline is dissipated.
[0040] The upper magnetic cover 8 is installed on the top of the multi-chamber particle damper 4 to seal the multi-chamber particle damper 4.
[0041] The lower magnetic cover 9 is installed at the bottom of the multi-chamber particle damper 4 to seal the multi-chamber particle damper 4.
[0042] Furthermore, the upper magnetic cover 8 and the lower magnetic cover 9 are made of magnetic materials, which can maintain the stability of the magnetic field and enhance the adjustment accuracy of the magnetic field on the magnetic damping particles 14 and the magnetorheological fluid.
[0043] In this embodiment, the damping force is significantly improved by adjusting the morphology of the magnetorheological fluid and the movement of the magnetic damping particles 14 based on the magnetic field strength. Energy is dissipated by the collision and friction between the magnetic damping particles 14 and the flow of the magnetorheological fluid, which has good high-frequency vibration control capability. At the same time, the stability of the magnetic field and the adjustment accuracy of the magnetic field are enhanced by the combined action of the upper magnetic cover 8 and the lower magnetic cover 9, so that the magnetic damping particles 14 and the magnetorheological fluid can accurately adjust the damping force and friction force to dissipate the vibration energy of the target pipeline.
[0044] In the embodiments of this application, the magnetic field generating module includes a magnetic core 6 and a coil 7. The specific structure of the magnetic field generating module is as follows: Figure 1 As shown.
[0045] The magnetic core 6 is installed inside the central through hole of the particle damper.
[0046] The coil 7 is installed around the magnetic core 6 and is used to receive the excitation signal sent by the vibration control and detection unit. It works together with the magnetic core 6 to generate a magnetic field.
[0047] The excitation signal is a PWM signal. By changing the duty cycle of the PWM signal, the current flowing through coil 7 is adjusted, thereby controlling the magnetic field strength.
[0048] In this embodiment, by setting a magnetic core 6 and a coil 7 in the center of the particle damper, the magnetic field strength and uniformity can be significantly enhanced, the damping force and friction force adjustment range can be improved, the magnetic field utilization efficiency can be optimized, and the PWM signal can be used as the excitation signal to generate the magnetic field, so that the magnetic field strength can be quickly adjusted and excessive fluctuations in the magnetic field strength can be avoided. This enables real-time and precise adjustment of the magnetic field strength, thereby achieving dynamic adjustment of the damping force and friction force.
[0049] In embodiments of this application, the magnetorheological elastomer vibration absorber includes a top magnetic end cap 10, a first vibration absorber 5, and a second vibration absorber 15. The specific structure of the magnetorheological elastomer vibration absorber is as follows: Figure 1 As shown.
[0050] Among them, the first vibration absorber 5 and the second vibration absorber 15 are made of MRE magnetorheological elastomer material.
[0051] The top magnetic end cap 10 is connected to the top of the first vibration absorber 5 and the outer wall of the second vibration absorber 15.
[0052] The top magnetic end cap 10 can be a cylinder or a polygonal column with a hollowed-out columnar structure. The bottom end of the top magnetic end cap 10 is connected to the first vibration absorber 5, and the inner wall of the hollowed-out part of the top magnetic end cap 10 is connected to the second vibration absorber 15.
[0053] The bottom of the first vibration absorber 5 is connected to the upper magnetic cover 8, and the inner wall of the second vibration absorber 15 is connected to the magnetic core 6.
[0054] The height of the magnetic core 6 is greater than the height of the particle damper. The protruding part of the magnetic core 6 is placed corresponding to the hollowed-out part of the top magnetic end cap 10. The magnetic core 6 and the top magnetic end cap 10 are connected by the second vibration absorber 15.
[0055] The height of the magnetic core 6 is higher than that of the multi-chamber particle damper 4. Its protruding part penetrates the central through hole of the upper magnetic cover 8. The second vibration absorber 15 is sleeved on the outer wall of the protruding part of the magnetic core 6. The bottom end of the top magnetic end cap 10 is fixedly connected to the top end of the first vibration absorber 5. The inner wall of the hollow part is fixedly connected to the outer wall of the top end of the second vibration absorber 15, forming a rigid connection chain of 'magnetic core 6-second vibration absorber 15-top magnetic end cap 10-first vibration absorber 5-upper magnetic cover 8'.
[0056] The first vibration absorber 5 and the second vibration absorber 15 are used to adjust their own stiffness according to the strength of the magnetic field to absorb the energy of pipeline vibration and suppress the amplitude of pipeline vibration.
[0057] Specifically, the top magnetic end cap 10 is connected to the upper magnetic cover 8 through the first vibration absorber 5, and to the magnetic core 6 through the second vibration absorber 15. The positions of the upper magnetic cover 8 and the magnetic core 6 are fixed as stators, and the top magnetic end cap 10 is the mover.
[0058] When a magnetic field is applied, the stiffness of the first vibration absorber 5 and the second vibration absorber 15 changes instantaneously. The degree of stiffness change corresponds to the magnetic field strength. After the excitation force generated by the vibration of the target pipeline is transmitted to the magnetically controlled adaptive particle composite pipeline suppressor, the top magnetic end cap 10, as the mover, remains in a fixed position due to inertial force. The particle damper and the magnetic core 6, as the stator, follow the vibration of the target pipeline and generate displacement. The relative position of the mover and the stator changes, and the first vibration absorber 5 and the second vibration absorber 15 deform according to the position change. Based on the deformation elasticity, the excitation force generated by the vibration of the target pipeline is offset.
[0059] The change in the relative position of the mover and the stator is used to drive the first vibration absorber 5 and the second vibration absorber 15 to deform, and to drive the internal medium of the particle damper to move.
[0060] In this embodiment, the mover and stator are connected by the first vibration absorber 5 and the second vibration absorber 15. The mover and stator are displaced according to the vibration of the target pipe, causing the relative position of the mover and stator to change. The first vibration absorber 5 and the second vibration absorber 15 deform based on the inertial force between the mover and stator during displacement, which cancels the excitation force generated by the vibration of the target pipe. During this process, the displacement frequency of the mover and stator is the same as the main vibration frequency of the target pipe. The displacement frequency can be adjusted according to the vibration of the target pipe, so that the magnetorheological elastomer vibration absorber can adapt to different vibration main frequency changes, improving the flexibility and adaptability of vibration reduction. Furthermore, by adjusting the stiffness of the first vibration absorber 5 and the second vibration absorber 15, the effective vibration reduction frequency range of the magnetorheological elastomer vibration absorber can be widened, so that the magnetorheological elastomer vibration absorber can effectively suppress vibrations in a wider frequency range.
[0061] In the embodiments of this application, the encapsulation shell includes a magnetic disk 3, a mass block 11, a non-magnetic shell 12, a non-magnetic base 2, and a pipe collar 1. The specific structure of the encapsulation shell is as follows: Figure 1 As shown.
[0062] Mass block 11 is installed on the top of the top magnetic end cap 10 and acts as a mover to counteract the excitation force of the target pipe when the target pipe vibrates.
[0063] Among them, mass block 11 is used to increase the weight of the mover and improve the efficiency of counteracting the excitation force of the target pipeline.
[0064] The non-magnetic base 2 is installed at the bottom of the magnetic disk 3.
[0065] The magnetic disk 3 and the magnetic core 6 are integrally formed. The magnetic disk 3 is combined with the top magnetic end cap 10 through the magnetic core 6 to enhance the strength and uniformity of the magnetic field.
[0066] The particle damper and magnetic field generating module are mounted on the top of the magnetic disk 3.
[0067] The non-magnetic outer shell 12 is connected to the non-magnetic base 2.
[0068] The non-magnetic base 2 is installed at the bottom of the magnetic disk 3, and the non-magnetic shell 12 is connected to the non-magnetic base 2. It is used to perform composite encapsulation of the particle damper, magnetorheological elastomer vibration absorber, magnetic field generating module, mass block 11 and magnetic disk 3, and to provide a protective shell.
[0069] After the non-magnetic outer shell 12 is connected to the non-magnetic base 2, it can shield the interference of external magnetic fields and enhance the stability of the internal magnetic field.
[0070] The pipe collar 1 is fixedly connected to the non-magnetic base 2, and is used to install the magnetically controlled adaptive particle composite pipe suppressor on the outer wall of the target pipe.
[0071] The non-magnetic base 2 is connected to the pipe collar 1 by bolts, which facilitates the disassembly and replacement of various parts of the magnetically controlled adaptive particle composite pipe suppressor. The inner wall of the pipe collar 1 is a 90° annular concave surface, which allows four magnetically controlled adaptive particle composite pipe suppressors to be installed on the target pipe at the same time. Each pipe collar 1 is connected to the others by bolts.
[0072] In this embodiment, a closed-loop magnetic field circuit is formed by the magnetic core 6, the magnetic disk 3, the upper magnetic cover 8 and the lower magnetic cover 9 of the particle damper, the non-magnetic outer shell 12, and the non-magnetic base 2. This ensures that the generated magnetic field can act synchronously, uniformly, and efficiently on the magnetorheological elastomer vibration absorber and the particle damper, avoiding coupling, interference, and energy consumption problems caused by multiple coils, and achieving coordinated adjustment of stiffness and damping. Furthermore, by increasing the mass of the mover by the mass block 11, the inertial force between the mover and the stator is enhanced, improving the efficiency of counteracting the excitation force of the target pipeline. At the same time, based on the pipeline collar 1, multiple magnetically controlled adaptive particle composite pipeline suppressors are installed on the target pipeline, which can counteract the excitation force of the target pipeline from multiple directions, improving the vibration suppression effect.
[0073] In the embodiments of this application, the vibration control and detection unit includes a vibration sensor 16, a magnetic field control module 17, a magnetic field drive module 18, and a power supply module 19. The circuit connection structure of the vibration control and detection unit is as follows: Figure 3 As shown.
[0074] The vibration monitoring unit is integrated on the same circuit board and installed on the outer wall of the pipe collar 1 after being encapsulated in a protective shell.
[0075] Vibration sensor 16 is electrically connected to magnetic field control module 17 and is used to detect the vibration signal of the target pipeline in real time and send it to magnetic field control module 17.
[0076] The magnetic field control module 17 is electrically connected to the magnetic field drive module 18. It is used to calculate the target magnetic field strength based on the vibration signal and generate magnetic field control commands based on the target magnetic field strength and send them to the magnetic field drive module 18.
[0077] The magnetic field drive module 18 is electrically connected to the magnetic field generating module and is used to convert the output current of the power module 19 into an excitation signal according to the magnetic field control command, and drive the magnetic field generating module to generate a magnetic field of a corresponding degree.
[0078] The power module 19 is also used to supply power to the vibration sensor 16, the magnetic field control module 17 and the magnetic field drive module 18.
[0079] Specifically, the magnetic field control command is the PWM signal parameters required to generate the magnetic field, and the magnetic field drive module 18 generates the required PWM signal as the excitation signal based on the PWM signal parameters.
[0080] In this embodiment, the vibration control detection unit detects the main vibration frequency of the target pipeline in real time, enabling the magnetically controlled adaptive particle composite pipeline suppressor to respond to vibration changes in real time. It dynamically adjusts the magnetic field strength according to the actual vibration situation, precisely and dynamically adjusts the damping force and friction of the particle damper and the stiffness of the magnetorheological elastomer vibration absorber, thereby improving the vibration reduction efficiency and enabling the magnetically controlled adaptive particle composite pipeline suppressor to maintain the best vibration suppression effect under different working conditions.
[0081] In the embodiments of this application, the multi-chamber particle damper 4 is electrically connected to the power module 19.
[0082] Triboelectric modules 21 are installed on the inner walls of the multi-chamber particle damper and the inner walls of the non-magnetic partition 13. The triboelectric modules 21 are used to convert the energy generated by the collision with the magnetic damping particles 14 into electrical energy and input it into the power supply module 19 for storage.
[0083] The power module 19 includes energy storage elements (such as supercapacitors) and power management circuits. It can be pre-charged during the initial installation of the power module 19, or it can be started by the triboelectric module 21 by weak initial environmental vibration, so as to ensure that the magnetically controlled adaptive particle composite pipeline suppressor starts automatically.
[0084] Specifically, the multi-chamber particle damper 4 is based on the triboelectric module 21 and electrically connected to the power supply module 19. The circuit connection structure of the triboelectric module 21 is as follows: Figure 3 As shown.
[0085] The non-magnetic separator 13 is wavy and divides the annular cavity of the multi-chamber particle damper 4 into multiple independent chambers through radial distribution, which is used to increase the collision friction area of the magnetic damping particles 14 and improve the energy conversion efficiency.
[0086] In this process, the magnetorheological fluid will flow during the vibration of the target pipe. The triboelectric module 21 converts the energy generated by the friction and flow impact of the magnetorheological fluid into electrical energy, which is then input into the power module 19 for storage. The internal filling medium of the particulate damper is a mixture of magnetorheological fluid and magnetic damping particles 14, with a filling rate of 70% to 85%. For example, the mixture can be made by mixing magnetorheological fluid with a volume ratio of 2:1 and spherical carbonyl iron powder particles with a particle size of 0.1-1 mm.
[0087] In this embodiment, the annular cavity of the multi-chamber particle damper 4 is divided into multiple independent chambers by a wave-shaped non-magnetic partition 13, and a triboelectric module 21 is set up to realize the conversion of motion energy into electrical energy. The energy conversion efficiency is improved by increasing the internal collision area of the multi-chamber particle damper 4, realizing internal energy circulation and self-sufficiency, alleviating dependence on external power supply, reducing operation and maintenance costs, and greatly expanding the application boundaries. At the same time, the initial electrical energy pre-charged and stored in the power module 19, or the initial environmental vibration to start the triboelectric module 21 for initial charging, ensures that the magnetically controlled adaptive particle composite pipeline suppressor starts automatically.
[0088] In embodiments of this application, the vibration control detection unit further includes a mode switching module 20, which is electrically connected to the magnetic field control module 17. The circuit connection structure of the mode switching module 20 is as follows: Figure 3 As shown.
[0089] The mode switching module 20 is used to receive mode switching commands from the outside world, and when triggered by the mode switching command, it sends the pre-stored control parameters to the magnetic field control module 17.
[0090] The magnetic field control module 17 is also used to generate magnetic field control commands based on control parameters and send them to the magnetic field drive module 18.
[0091] The mode switching module 20 stores control parameters for at least two working modes.
[0092] The following example illustrates the switching of operating modes. This application includes at least a first operating mode and a second operating mode. The switching of operating modes is achieved by adjusting the installation position of the magnetorheological elastomer vibration absorber.
[0093] For the first working mode: The upper magnetic cover 8 and the top magnetic end cover 10 are connected by the first vibration absorber 5, and the first vibration absorber 5 is bonded to the bottom of the top magnetic end cover 10 and the top of the upper magnetic cover 8. The magnetic core 6 and the top magnetic end cover 10 are connected by the second vibration absorber 15, and the second vibration absorber 15 is bonded between the top side of the magnetic core 6 and the inner wall of the hollowed-out part of the top magnetic end cover 10.
[0094] During the operation of the first working mode, the first vibration absorber 5 operates in compression-tension mode to bear and transmit axial inertial force, and the second vibration absorber 15 operates in shear mode to increase deformation resistance according to changes in the magnetic field. The top magnetic end cap 10 and the mass block 11 form a mover. When the target pipe vibrates, the mover maintains its original state according to the inertial force generated by the vibration and generates relative displacement with the stator. The magnetorheological fluid and magnetic damping particles 14 inside the particle damper generate friction and collision to dissipate the vibration energy of the target pipe according to the relative displacement. The first vibration absorber 5 and the second vibration absorber 15 deform in the relative displacement, and the elasticity based on deformation and deformation recovery offsets the pipe excitation force.
[0095] For the second working mode: By rigidly connecting the upper magnetic cover 8 and the top magnetic end cover 10, the lower magnetic cover 9 and the magnetic disk 3 are connected based on the first vibration absorber 5. The first vibration absorber 5 is bonded to the bottom of the lower magnetic cover 9 and the top of the magnetic disk 3. The magnetic core 6 and the top magnetic end cover 10 are connected based on the second vibration absorber 15. The second vibration absorber 15 is bonded between the top side of the magnetic core 6 and the inner wall of the hollowed-out part of the top magnetic end cover 10.
[0096] During the second working mode, the magnetic disk 3 and magnetic core 6 act as stators, moving in tandem with the pipe vibration. The mass block 11, the top magnetic end cap 10, and the particle damper are combined to form a large mover, thereby increasing the magnitude of the inertial force and enhancing the efficiency of counteracting the target pipe's vibration force. When the target pipe vibrates, the relative displacement between the mover and stator increases. The magnetorheological fluid and magnetic damping particles 14 inside the particle damper experience increased friction and collision amplitude due to the relative displacement, improving the efficiency of dissipating the target pipe's vibration energy. The increased elasticity generated by the deformation and recovery of the first and second vibration absorbers 5 during relative displacement significantly counteracts the pipe's vibration force.
[0097] The second working mode is more suitable for target pipelines with larger vibration amplitudes compared to the first working mode.
[0098] Furthermore, the mode switching module 20 has a mode selection switch. When switching modes, after the position of the magnetorheological elastomer vibration absorber is adjusted, the corresponding mode selection switch is turned on to complete the mode switching.
[0099] The mode selection switch can generate a mode switching command and send it to the magnetic field control module 17. The magnetic field control module 17 calls the working parameters stored in the mode switching module 20 according to the mode switching command.
[0100] In this embodiment, based on the combined action of the first vibration absorber 5 and the second vibration absorber 15, the effective working volume and morphological diversity of the MRE magnetorheological elastomer material are maximized within a limited axial space, thereby achieving rapid, continuous, and reversible adjustment of the overall stiffness of the suppressor over a wider range. Furthermore, by making simple mechanical adjustments to the first vibration absorber 5, the magnetically controlled adaptive particle composite pipe suppressor can operate in multiple modes, optimizing vibration reduction performance in the mid-to-high frequency and low-frequency bands respectively. This allows a single suppressor to cover a wider frequency range, improving its ability to handle complex pipe vibration spectra and enhancing the versatility and economy of the magnetically controlled adaptive particle composite pipe suppressor.
[0101] A second aspect of this application provides a method for suppressing pipeline vibration, the method flow of which is as follows: Figure 4 As shown, pipeline vibration suppression methods include: S1. Obtain the vibration signal of the target pipeline.
[0102] The vibration signal is the dominant vibration frequency of the target pipeline.
[0103] Furthermore, before the initial acquisition of the vibration signal, the vibration of the target pipeline is transmitted to the magnetically controlled adaptive particle composite pipeline suppressor. The mover generates relative displacement due to inertial force, and at the same time drives the internal medium of the particle damper to move. The energy is dissipated through the movement of the magnetorheological fluid and the magnetic damping particles 14 and drives the triboelectric module 21 to generate electricity. The power module 19 stores the received current and supplies power to the vibration control and detection unit.
[0104] After the power module 19 supplies power, the vibration sensor 16 collects the vibration signal.
[0105] S2. Generate magnetic field control commands based on vibration signals.
[0106] S3. A magnetic field is generated under the trigger of a magnetic field control command.
[0107] The magnitude of the current required to generate the magnetic field is determined according to the magnetic field control command.
[0108] S4. The vibration of the target pipeline is tuned and reduced based on the damping force and friction of the particle damper adjusted by the magnetic field and the stiffness of the magnetorheological elastomer vibration absorber.
[0109] Specifically, after the magnetic field is applied, the magnetorheological fluid of the particle damper solidifies, the damping force increases, the friction of the magnetic damping particles 14 in the magnetorheological fluid increases, and the stiffness of the magnetorheological elastomer vibration absorber is improved.
[0110] After detecting the vibration signal of the target pipeline, the magnetically controlled adaptive particle composite pipeline suppressor has the same vibration frequency as the target pipeline. Its internal mover generates an inertial force that is opposite to the vibration of the target pipeline. The deformation of the magnetorheological elastomer vibration absorber cancels the pipeline excitation force, and the damping force and friction of the particle damper dissipate the vibration energy.
[0111] In this embodiment, by analyzing the pipeline vibration signal in real time and generating magnetic field control commands, the magnetic field strength is adjusted in real time within milliseconds. Based on the magnetic field, the magnetorheological fluid morphology of the particle damper, the movement mode of the magnetic damping particles 14, and the stiffness of the magnetorheological elastomer vibration absorber are adjusted synchronously to achieve dual-mechanism synergistic broadband vibration reduction: the particle damper dissipates mid-to-high frequency vibration energy based on damping force and friction, and the magnetorheological elastomer vibration absorber counteracts the excitation force of a specific frequency based on reverse inertial force, which greatly improves the vibration reduction efficiency and the applicable vibration frequency range.
[0112] In the embodiments of this application, the process of generating magnetic field control commands based on the vibration signal is as follows: Figure 5 As shown, it also includes: S21. Identify the main vibration frequency of the target pipeline based on the vibration signal.
[0113] S22. Call the control parameters corresponding to the current working mode according to the current working mode.
[0114] The operating mode is determined based on the mode switching command. Once determined, the control parameters for the corresponding operating mode are called.
[0115] S23. Determine the required damping force, friction force, and magnetorheological elastomer vibration absorber stiffness based on the control parameters, and determine the required current to generate the magnetic field.
[0116] Specifically, the control parameters are stored in the form of an optimal control parameter table, including the correspondence between the dominant vibration frequency and the damping force, friction force, and stiffness of the magnetorheological elastomeric vibration absorber, as well as the correspondence between the damping force, friction force, and stiffness of the magnetorheological elastomeric vibration absorber and the current required to generate a magnetic field of the corresponding intensity. The required current is determined by querying the optimal control parameter table.
[0117] S24. Generate magnetic field control commands based on the required current.
[0118] In this embodiment, determining the control parameters through the optimal control parameter table provides a clear reference for operators or the control system. There is no need for complex real-time calculations and debugging; the corresponding magnetic field strength can be determined simply by referring to the parameters in the table, simplifying the operation process. Furthermore, based on the optimal control parameter table, the required control parameters can be quickly determined, enabling the magnetic field strength to be adjusted more promptly when facing rapidly changing operating conditions, thereby quickly changing the damping force and improving the dynamic response performance of the entire suppressor.
[0119] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A magnetically controlled adaptive particle composite pipeline suppressor, characterized in that: Includes a particle damper, a magnetic field generating module, a magnetorheological elastomer vibration absorber, a packaging shell, and a vibration control and detection unit; The encapsulation shell is installed on the outer wall of the target pipe to encapsulate the particle damper, the magnetorheological elastomer vibration absorber and the magnetic field generating module, and to provide the shell to protect the internal structure. The vibration control and detection unit is installed on the outside of the encapsulation shell and is electrically connected to the magnetic field generating module. The vibration control and detection unit is used to detect whether the pipeline is vibrating and to control the magnetic field generating module to generate a magnetic field of corresponding intensity according to the vibration amplitude and frequency. The particle damper is used to adjust the damping force and friction of the internal medium in real time according to the strength of the magnetic field, thereby dissipating the vibration energy of the target pipeline. The magnetorheological elastomer vibration absorber is connected to the particle damper and is used to adjust its own stiffness in real time according to the strength of the magnetic field so that the natural frequency matches the vibration frequency of the pipeline and cancels the excitation force of the target pipeline through resonant coupling.
2. The magnetically controlled adaptive particle composite pipeline suppressor according to claim 1, characterized in that: The particle damper includes a multi-chamber particle damper, an upper magnetic cover, and a lower magnetic cover; The multi-chamber particle damper, the upper magnetic cover, and the lower magnetic cover all have a central through hole, and the central through holes of the multi-chamber particle damper, the upper magnetic cover, and the lower magnetic cover are connected. The multi-chamber particle damper is internally divided into multiple chambers by a non-magnetic partition, and the internal medium filled in the chambers is magnetorheological fluid and magnetic damping particles. The magnetorheological fluid is used to adjust the damping force in real time according to the change of magnetic field, and the magnetic damping particles are used to adjust the friction force in real time according to the change of magnetic field. The upper magnetic cover is installed on the top of the multi-chamber particle damper to seal the multi-chamber particle damper; The lower magnetic cover is installed at the bottom of the multi-chamber particle damper to seal the multi-chamber particle damper.
3. The magnetically controlled adaptive particle composite pipeline suppressor according to claim 2, characterized in that: The magnetic field generating module includes a magnetic core and a coil; The magnetic core is installed inside the central through hole of the particle damper. The coil is mounted around the magnetic core and is used to receive the excitation signal sent by the vibration control and detection unit, and works together with the magnetic core to generate a magnetic field.
4. The magnetically controlled adaptive particle composite pipeline suppressor according to claim 3, characterized in that: The magnetorheological elastomer vibration absorber includes a top magnetic end cap, a first vibration absorber, and a second vibration absorber. The top magnetic end cap is connected to the top of the first vibration absorber and the outer wall of the second vibration absorber; The bottom end of the first vibration absorber is connected to the upper magnetic cover, and the inner wall of the second vibration absorber is connected to the magnetic core; The first and second vibration absorbers are used to adjust their own stiffness according to the strength of the magnetic field to absorb the energy of pipeline vibration and suppress the vibration amplitude of the pipeline.
5. The magnetically controlled adaptive particle composite pipeline suppressor according to claim 4, characterized in that: The encapsulation housing includes a magnetic disk, a mass block, a non-magnetic housing, a non-magnetic base, and a pipe collar; The mass block is installed on the top of the top magnetic end cap and acts as a mover to counteract the excitation force of the target pipe when the target pipe vibrates. The non-magnetic base is installed at the bottom of the magnetic disk; The particle damper and the magnetic field generating module are mounted on the top of the magnetically conductive disk; The non-magnetic outer shell is connected to the non-magnetic base; The pipe collar is fixedly connected to the non-magnetic base and is used to install the magnetically controlled adaptive particle composite pipe suppressor on the outer wall of the target pipe.
6. The magnetically controlled adaptive particle composite pipeline suppressor according to claim 2, characterized in that: The vibration control and detection unit includes a vibration sensor, a magnetic field control module, a magnetic field drive module, and a power supply module. The vibration sensor is electrically connected to the magnetic field control module and is used to detect the vibration signal of the target pipeline in real time and send it to the magnetic field control module. The magnetic field control module is electrically connected to the magnetic field drive module and is used to calculate the target magnetic field strength based on the vibration signal, and generate a magnetic field control command based on the target magnetic field strength and send it to the magnetic field drive module. The magnetic field driving module is electrically connected to the magnetic field generating module and is used to convert the output current of the power module into an excitation signal according to the magnetic field control command, and drive the magnetic field generating module to generate a magnetic field of a corresponding degree.
7. The magnetically controlled adaptive particle composite pipeline suppressor according to claim 6, characterized in that: The multi-chamber particle damper is electrically connected to the power module. Triboelectric modules are installed on the inner walls of the multi-chamber particle damper and the inner walls of the non-magnetic partition. The triboelectric modules are used to convert the energy generated by the collision with the magnetic damping particles into electrical energy and input it into the power module for storage.
8. The magnetically controlled adaptive particle composite pipeline suppressor according to claim 6, characterized in that: The vibration control and detection unit also includes a mode switching module, which is electrically connected to the magnetic field control module. The mode switching module is used to receive mode switching commands from the outside world, and when triggered by the mode switching command, it sends the pre-stored control parameters to the magnetic field control module. The magnetic field control module is also used to generate magnetic field control commands based on the control parameters and send them to the magnetic field drive module.
9. A method for suppressing pipeline vibration, applied to the magnetically controlled adaptive particle composite pipeline suppressor according to any one of claims 1-8, characterized in that: Acquire vibration signals from the target pipeline; Generating magnetic field control commands based on the vibration signals; A magnetic field is generated upon triggering the magnetic field control command; The vibration of the target pipeline is suppressed by adjusting the damping force and friction of the magnetic field-controlled particle damper and the stiffness of the magnetorheological elastomer vibration absorber.
10. The pipeline vibration suppression method according to claim 9, characterized in that: The generation of magnetic field control commands based on the vibration signal includes: The vibration frequency of the target pipeline is identified based on the vibration signal. Call the control parameters corresponding to the current working mode according to the current working mode; Based on the control parameters, determine the required damping force, friction force, and stiffness of the magnetorheological elastomer vibration absorber to suppress the vibration of the target pipeline, and determine the required current to generate the magnetic field. The magnetic field control command is generated based on the required current.