Pipeline vibration reduction device and pipeline vibration reduction method

Abstract

The present invention provides a pipeline vibration reduction device and method. The device includes: an inner shell, an outer shell, a vibration reduction assembly, a controller, a pipeline vibration sensor, and a mass vibration sensor. The inner shell is installed on the outside of the pipeline to be vibration-reduced, with its inner surface in close contact with the pipeline to be vibration-reduced. The outer shell is sleeved on the outside of the inner shell. Multiple groups of vibration reduction assemblies are arranged circumferentially between the inner and outer shells. The pipeline vibration sensor is arranged on the pipeline to be vibration-reduced. The vibration reduction assembly includes a sliding mass, a magnetic component, and a magnetorheological elastomer. The sliding mass is slidably arranged between the inner and outer shells. The magnetorheological elastomer is connected to the sliding mass. The magnetic component is connected to the magnetorheological elastomer. An excitation coil is provided on the magnetic component. The mass vibration sensor is provided on the sliding mass. The controller is used to adjust the current of the excitation coil based on data collected by the sensor. This solution can achieve dynamic response and precise control of multi-band vibration.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline vibration reduction, and more particularly to a pipeline vibration reduction device and a pipeline vibration reduction method. Background Art

[0002] In modern industry and infrastructure, pipeline systems are widely used to transport fluids, gases, and other substances. However, during operation, pipelines are subject to various vibrations, which can be caused by fluid flow, mechanical equipment operation, environmental factors, or the structural characteristics of the pipeline itself. Prolonged vibration can lead to fatigue damage in the pipeline system, which can cause serious consequences such as cracks, oil leaks, and ruptures. Furthermore, vibrations can be transmitted through the supporting structures connecting the pipelines to buildings or other critical facilities, causing noise pollution and structural resonance, impacting the stability and safety of the entire system.

[0003] Traditional pipeline vibration reduction technologies primarily rely on passive vibration reduction measures, such as the passive damping technology disclosed in Chinese Patent Application No. 201810648820.X, the elastic support vibration reduction method described in 201110226949.X, and the vibration reduction structure proposed in 201910891055.9. While these measures can mitigate the impact of vibration to a certain extent, they are difficult to dynamically adjust to actual operating conditions and are unable to effectively cope with complex, multi-band vibration environments. Summary of the Invention

[0004] The present invention has been made in view of the above-mentioned problems. According to one aspect of the present invention, a pipeline vibration reduction device is provided, comprising: an inner shell, an outer shell, a vibration reduction assembly, a controller, a pipeline vibration sensor, and a mass vibration sensor; the inner shell is mounted on the outside of the pipeline to be vibration-reduced, with the inner surface of the inner shell in close contact with the pipeline to be vibration-reduced; the outer shell is sleeved on the outside of the inner shell; the vibration reduction assemblies are provided in multiple groups, each of which is circumferentially arranged between the inner shell and the outer shell; the pipeline vibration sensor is disposed on the pipeline to be vibration-reduced; the vibration reduction assembly includes a sliding mass, a magnetic permeable assembly, and a magnetorheological elastomer, the sliding mass being slidably arranged between the inner shell and the outer shell; the magnetorheological elastomer is connected to the sliding mass; the magnetic permeable assembly is connected to the magnetorheological elastomer; an excitation coil is disposed on the magnetic permeable assembly; the mass vibration sensor is disposed on the sliding mass of any one group of the vibration reduction assemblies; and the controller is configured to adjust the current of the excitation coil based on data collected by the pipeline vibration sensor and the mass vibration sensor, so that the vibration frequency of the sliding mass is the same as the vibration frequency of the pipeline to be vibration-reduced.

[0005] Exemplarily, the left and right sides of the sliding mass block are connected to vibration guide plates, the number of groups of magnetorheological elastomers corresponds one-to-one to the vibration guide plates; the number of magnetorheological elastomers in each group is two, and the two magnetorheological elastomers are respectively tightly arranged on the front and rear sides of the vibration guide plate; the number of magnetic conductive components corresponds one-to-one to the vibration guide plates; the magnetic conductive components are respectively connected to the magnetorheological elastomers located on the front and rear sides of the vibration guide plate.

[0006] Exemplarily, the magnetic conductive assembly includes two magnetic conductive plates and a magnetic conductive part for connecting the two magnetic conductive plates; the two magnetic conductive plates are respectively connected to the magnetorheological elastomer located on the front and rear sides of the vibration guide plate; and the excitation coil is wound on the magnetic conductive part.

[0007] Exemplarily, it further includes a fixing plate, the upper and lower sides of which are respectively fixed to the outer shell and the inner shell; the end of the magnetic conductive plate is connected to the fixing plate.

[0008] Exemplarily, there is a gap between the end of the vibration guide plate and the fixed plate.

[0009] Exemplarily, springs are connected to both the left and right sides of the sliding mass block, and one end of the spring away from the sliding mass block is connected to the magnetic conductive component.

[0010] Exemplarily, pulleys are provided at both ends of the sliding mass block, an outer surface slide rail is provided on the outer side of the inner shell body, and an inner surface slide rail is provided on the inner side of the outer shell body. The pulley located at the upper end of the sliding mass block is slidably arranged on the inner surface slide rail; the pulley located at the lower end of the sliding mass block is slidably arranged on the outer surface slide rail.

[0011] According to another aspect of the present application, a pipeline vibration reduction method is provided, which is applied to the above-mentioned pipeline vibration reduction device; the method includes: obtaining pipeline vibration data collected by the pipeline vibration sensor and sliding mass block vibration data collected by the mass block vibration sensor; processing the pipeline vibration data to obtain the pipeline vibration frequency of the pipeline to be vibration-reduced; processing the sliding mass block vibration data to obtain the mass block vibration frequency of the sliding mass block; determining the driving current of the excitation coil based on the pipeline vibration frequency and the mass block vibration frequency; and adjusting the current of the excitation coil according to the driving current so that the vibration frequency of the sliding mass block is the same as the vibration frequency of the pipeline to be vibration-reduced.

[0012] Exemplarily, determining the driving current of the excitation coil based on the pipeline vibration frequency and the mass vibration frequency includes: determining the driving current by the following formula:

[0013]

[0014] in, is the driving current, is the pipeline vibration frequency, is the vibration frequency of the mass block, is the proportional coefficient of the influence of current on the shear modulus of the magnetorheological elastomer, is the rate of change of the vibration frequency of the mass block as the shear modulus of the magnetorheological elastomer changes.

[0015] Exemplarily, the processing of the pipeline vibration data to obtain the pipeline vibration frequency of the pipeline to be attenuated includes: processing the pipeline vibration data through fast Fourier transform to obtain a vibration spectrum diagram of the pipeline to be attenuated; and determining the pipeline vibration frequency based on the vibration spectrum diagram of the pipeline to be attenuated; and / or, processing the sliding mass block vibration data to obtain the mass block vibration frequency of the sliding mass block includes: processing the sliding mass block vibration data through fast Fourier transform to obtain a vibration spectrum diagram of the sliding mass block; and determining the mass block vibration frequency based on the vibration spectrum diagram of the sliding mass block.

[0016] The above technical solution, by providing a vibration reduction component, can achieve a vibration reduction effect through the shear energy dissipation mechanism between the sliding mass block and the magnetorheological elastomer when the pipeline to be damped vibrates. Moreover, by providing a controller, the solution can adjust the shear modulus of the magnetorheological elastomer in real time according to the vibration conditions of the pipeline to be damped, thereby making the vibration reduction effect of the vibration reduction component compatible with the vibration conditions of the pipeline to be damped. This active vibration reduction control method can automatically adapt and adjust in complex and changeable vibration environments, achieve dynamic response and precise control of multi-band vibrations, and help improve the vibration reduction effect of the pipeline to be damped. In short, the device of this solution has good adaptability and flexibility, and has a good vibration reduction effect.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features, and advantages of the present invention will become more apparent through a more detailed description of the embodiments of the present invention with reference to the accompanying drawings. The accompanying drawings are provided to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and are not intended to limit the present invention. In the drawings, the same reference numerals generally represent the same components or steps.

[0019] Figure 1 A schematic diagram showing the overall structure of a pipeline vibration reduction device according to an embodiment of the present application is shown;

[0020] Figure 2 Show Figure 1 A partial enlarged view of part A;

[0021] Figure 3 A schematic structural diagram showing a pipeline vibration reduction device according to an embodiment of the present application in a main view direction;

[0022] Figure 4 A schematic structural diagram of a vibration reduction assembly according to one embodiment of the present application is shown;

[0023] Figure 5 A schematic diagram showing a magnetic circuit according to one embodiment of the present application;

[0024] Figure 6 A schematic flow chart of a pipeline vibration reduction method according to an embodiment of the present application is shown.

[0025] In the figure: 1. Pipe to be vibration-damped; 2. Inner shell; 3. Outer shell; 4. Pipe vibration sensor; 5. Sliding mass block; 6. Mass block vibration sensor; 7. Magnetic plate; 8. Magnetic member; 9. Excitation coil; 10. Fixed plate; 11. Spring; 12. Pulley; 13. Inner surface slide rail; 14. Outer surface slide rail; 15. Magnetorheological elastomer; 16. Vibration guide plate; 17. Guide rod. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more apparent, exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described herein. Based on the embodiments of the present invention described in the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present invention.

[0027] As mentioned above, the pipeline vibration reduction technology in the related art mainly relies on passive vibration reduction measures. Although these measures can reduce the impact of vibration to a certain extent, their effectiveness is often limited by the range of variation of vibration frequency and intensity. In addition, these traditional vibration reduction devices are difficult to dynamically adjust according to actual working conditions, cannot be actively adjusted manually to adapt to various vibration scenarios, and are difficult to effectively cope with complex, multi-band vibration environments. In view of this, the present application provides a pipeline vibration reduction device and a pipeline vibration reduction method. The device and method can dynamically adjust the vibration reduction effect according to the actual vibration conditions of the pipeline, so that it can effectively cope with complex, multi-band vibration environments and ensure good vibration reduction effects. The device and method are described in detail below.

[0028] According to one aspect of the embodiment of the present application, a pipeline vibration reduction device is provided. Figure 1-4 The device includes: an inner shell 2, an outer shell 3, a vibration reduction component, a controller (not shown in the figure), a pipeline vibration sensor 4 and a mass vibration sensor 6; the inner shell 2 is installed on the outside of the pipeline 1 to be vibration-reduced, and the inner surface of the inner shell 2 is in close contact with the pipeline 1 to be vibration-reduced; the outer shell 3 is sleeved on the outside of the inner shell 2; there are multiple groups of vibration reduction components, and the multiple groups of vibration reduction components are arranged between the inner shell 2 and the outer shell 3 along the circumferential direction; the pipeline vibration sensor 4 is arranged on the pipeline 1 to be vibration-reduced; the vibration reduction component includes a sliding mass block 5, a magnetic conductive component and a magnetorheological elastomer 15, and the sliding mass block 5 is slidably arranged between the inner shell 2 and the outer shell 3; the magnetorheological elastomer 15 is connected to the sliding mass block 5; the magnetic conductive component is connected to the magnetorheological elastomer 15; an excitation coil 9 is provided on the magnetic conductive component; and the mass vibration sensor 6 is provided on the sliding mass block 5 of any group of vibration reduction components.

[0029] In the solution of this example, the controller is used to adjust the current of the excitation coil 9 based on the data collected by the pipeline vibration sensor 4 and the mass block vibration sensor 6 respectively, so that the vibration frequency of the sliding mass block 5 is the same as the vibration frequency of the pipeline 1 to be damped.

[0030] Herein, the circumferential direction of the pipe 1 to be vibration-damped is the left-right direction, the radial direction of the pipe 1 to be vibration-damped is the up-down direction, and the axial direction of the pipe 1 to be vibration-damped is the front-back direction.

[0031] Optionally, both the inner shell 2 and the outer shell 3 can be formed by splicing multiple sections. For example, the inner shell 2 can be formed by splicing two 180° arc structures, or by splicing four 90° arc structures. The splicing method of the outer shell 3 is similar to that of the inner shell 2 and will not be described in detail. Figure 1 In the illustrated embodiment, the outer shell 3 is constructed by splicing together four 90° arc-shaped structures. Each spliced ​​structure has two protruding flanges with threaded holes, and adjacent arc-shaped structures are secured together by bolts. Similarly, the inner shell 2 is also constructed by splicing together four 90° arc-shaped structures. Each spliced ​​structure has two protruding flanges with threaded holes, and adjacent arc-shaped structures are secured together by bolts. The specific structure and securing method are readily understood by those skilled in the art and will not be described in detail here.

[0032] Optionally, both the pipeline vibration sensor 4 and the mass vibration sensor 6 may be any existing or future developed sensor capable of detecting structural vibration. For example, a displacement sensor, velocity sensor, acceleration sensor, etc. may be used. For ease of description, in some of the following embodiments, the pipeline vibration sensor 4 and the mass vibration sensor 6 are both acceleration sensors.

[0033] In the solution of this example, there are multiple groups of vibration damping components, which are arranged between the inner shell 2 and the outer shell 3 along the circumferential direction. The specific number of groups of vibration damping components can be set according to actual needs, for example, it can be two groups, three groups, four groups or more groups. Figure 1 In the embodiment shown, the number of the vibration reduction assemblies is four.

[0034] As described above, the magnetorheological elastomer 15 is connected to the sliding mass block 5. The magnetorheological elastomer 15 is fixed relative to the inner shell 2. In some embodiments, the magnetorheological elastomer 15 can be directly connected to the sliding mass block 5. For example, the magnetorheological elastomer 15 can be closely arranged on the front side and / or rear side of the sliding mass block 5. In other embodiments, the magnetorheological elastomer 15 can be indirectly connected to the sliding mass block 5. For example, the sliding mass block 5 can be connected to a structure that transmits vibrations, and the magnetorheological elastomer 15 can be closely arranged on the structure.

[0035] Optionally, the controller may be connected to the pipeline vibration sensor 4 and the mass vibration sensor 6 respectively to obtain data collected by the pipeline vibration sensor 4 and the mass vibration sensor 6 respectively.

[0036] Optionally, the excitation coil 9 may be externally connected to a programmable DC power supply, and the controller is connected to the DC power supply to adjust the current in the excitation coil 9 by controlling the current output by the DC power supply.

[0037] It can be understood that the magnetorheological elastomer 15 (MRE) is an intelligent material whose mechanical properties can be rapidly adjusted under the influence of an external magnetic field. By varying the strength of the magnetic field applied to the MRE, its shear modulus can be adjusted in real time, adapting it to vibrations of varying frequencies and amplitudes, thereby achieving more precise and efficient vibration control. In this exemplary embodiment, a closed magnetic circuit is formed between the magnetic conductive component and the magnetorheological elastomer 15. When power is supplied to the excitation coil 9, a magnetic field is generated around the excitation coil 9. This magnetic field is transmitted to the magnetorheological elastomer 15 through the magnetic conductive component, thereby changing the shear modulus of the magnetorheological elastomer 15. When the pipeline 1 to be damped experiences horizontal or vertical vibration, the vibration is transmitted to the sliding mass 5, causing it to reciprocate between the inner shell 2 and the outer shell 3. The vibration of the sliding mass block 5 acts on the magnetorheological elastomer 15 connected to it. Therefore, when the shear modulus of the magnetorheological elastomer 15 changes, the vibration frequency of the sliding mass block 5 can be changed through the shear energy dissipation mechanism between the sliding mass block 5 and the magnetorheological elastomer 15, so that the vibration frequency of the sliding mass block 5 matches the vibration frequency of the pipeline 1 to be attenuated, thereby achieving effective vibration reduction control.

[0038] The above technical solution, by providing a vibration reduction component, can achieve a vibration reduction effect through the shear energy dissipation mechanism between the sliding mass block 5 and the magnetorheological elastomer 15 when the pipeline 1 to be damped vibrates. Moreover, by providing a controller, the solution can adjust the shear modulus of the magnetorheological elastomer 15 in real time according to the vibration condition of the pipeline 1 to be damped, thereby making the vibration reduction effect of the vibration reduction component compatible with the vibration condition of the pipeline 1 to be damped. This active vibration reduction control method can automatically adapt and adjust in a complex and changeable vibration environment, achieving dynamic response and precise control of multi-band vibrations, thereby helping to improve the vibration reduction effect of the pipeline 1 to be damped. In short, the device of this solution has good adaptability and flexibility, and has a good vibration reduction effect.

[0039] For example, see Figure 2 The left and right sides of the sliding mass block 5 are connected to a vibration guide plate 16, and the number of groups of magnetorheological elastomers 15 corresponds one-to-one to the vibration guide plates 16; the number of magnetorheological elastomers 15 in each group is two, and the two magnetorheological elastomers 15 are respectively closely arranged on the front and rear sides of the vibration guide plate 16; the number of magnetic conductive components corresponds one-to-one to the vibration guide plates 16; the magnetic conductive components are respectively connected to the magnetorheological elastomers 15 located on the front and rear sides of the vibration guide plate 16.

[0040] Optionally, the vibration guide plate 16 may be made of a steel plate.

[0041] In this example, the sliding mass 5 acts on the magnetorheological elastomer 15 via the vibration guide plate 16. When the current in the excitation coil 9 is adjusted, the shear modulus of the magnetorheological elastomer 15 changes, matching the vibration frequency of the sliding mass 5 with that of the pipeline, thereby achieving effective vibration control.

[0042] In such Figure 2 In the embodiment shown, both sides of the sliding mass 5 are connected to the corresponding vibration guide plates 16 via arc-shaped guide rods 17. This structural arrangement helps to improve the overall structural strength and stability of the device.

[0043] The above technical solution sets a vibration guide plate 16 and sets two magnetorheological elastomers 15 closely on the front and rear sides of the vibration guide plate 16, respectively, so that the sliding mass block 5 can act on the magnetorheological elastomer 15 through the vibration guide plate 16. As a result, the stiffness of the magnetorheological elastomer 15 can be changed by changing the shear modulus of the magnetorheological elastomer 15, thereby affecting the vibration frequency of the sliding mass block 5, so that the vibration frequency of the sliding mass block 5 matches the vibration frequency of the pipeline 1 to be damped, thereby achieving effective vibration control.

[0044] For example, referring to Figure 2 、 4 The magnetic conductive component includes two magnetic conductive plates 7 and a magnetic conductive part 8 for connecting the two magnetic conductive plates 7; the two magnetic conductive plates 7 are respectively connected to the magnetorheological elastomer 15 located on the front and rear sides of the vibration guide plate 16; the excitation coil 9 is wound on the magnetic conductive part 8.

[0045] Optionally, the excitation coil 9 can be wound on the magnetic conductive member 8 in a multi-segmented manner. Figure 4 In the embodiment shown, the excitation coil 9 may include two sections, which are respectively wound around the magnetic conductive member 8 near the two magnetic conductive plates 7. In this case, the magnetic circuit may be as follows: Figure 5 As shown, the vibration guide plate 16, the magnetorheological elastomer 15, the magnetic conductive plate 7 and the magnetic conductive member 8 form a closed magnetic circuit.

[0046] The above technical solution sets two magnetic conductive plates 7 and a magnetic conductive part 8 for connecting the two magnetic conductive plates 7, and winds the excitation coil 9 on the magnetic conductive part 8. The vibration conductive plate 16, the magnetorheological elastomer 15, the magnetic conductive plate 7 and the magnetic conductive part 8 can form a closed magnetic circuit, so that the shear modulus of the magnetorheological elastomer 15 can be changed by changing the current of the excitation coil 9, thereby realizing dynamic adjustment of the vibration reduction effect of the device.

[0047] For example, referring to Figure 1 、 3 4. The device also includes a fixing plate 10, the upper and lower sides of which are respectively fixed to the outer shell 3 and the inner shell 2; the end of the magnetic conductive plate 7 is connected to the fixing plate 10.

[0048] The specific methods of fixing the fixing plate 10 to the outer shell 3 and the inner shell 2 include but are not limited to plugging, clamping, welding, threaded connection, etc. Figure 3 In the illustrated embodiment, the fixing plate 10 can be fixedly connected to the outer shell 3 and the inner shell 2, respectively, via L-shaped angle steel. Specifically, the fixing plate 10 can be fixedly connected to the angle steel via bolts and nuts, and the angle steel can be fixedly connected to the outer shell 3 / inner shell 2 via bolts and nuts. Those skilled in the art will appreciate the specific connection and fixing methods, and will not be described in detail here.

[0049] The device of the above solution has a simple overall structure, is easy to install, and has good structural strength and stability.

[0050] For example, see Figure 2 There is a gap between the end of the vibration guide plate 16 and the fixed plate 10. By providing a gap between the end of the vibration guide plate 16 and the fixed plate 10, a buffer area can be provided for the shear deformation of the magnetorheological elastomer 15, thereby ensuring that its mechanical properties can be optimized and its adaptability and reliability can be improved.

[0051] For example, see Figure 2 , springs 11 are connected to the left and right sides of the sliding mass block 5, and one end of the spring 11 away from the sliding mass block 5 is connected to the magnetic conductive component.

[0052] In the embodiment where the magnetic conductive component includes the magnetic conductive plate 7, the end of the spring 11 away from the sliding mass block 5 can be connected to the magnetic conductive plate 7. Figure 2 In the embodiment shown, the spring 11 may be an arc-shaped spring 11. There may be two springs 11 connected to each side of the sliding mass 5, and the two springs 11 are symmetrically arranged on both sides of the guide rod 17.

[0053] The above technical solution arranges a spring 11 between the sliding mass block 5 and the magnetic conductive component. When the vibration amplitude of the pipeline 1 to be damped changes, the elastic force of the spring 11 can be used to automatically reset the sliding mass block 5. This helps to ensure the stability and vibration damping effect of the device, and helps to improve the long-term reliability of the vibration damping effect.

[0054] For example, Figure 2 As shown, pulleys 12 are provided at the upper and lower ends of the sliding mass block 5, an outer surface slide rail 14 is provided on the outer side of the inner shell 2, and an inner surface slide rail 13 is provided on the inner side of the outer shell 3. The pulley 12 located at the upper end of the sliding mass block 5 is slidably set on the inner surface slide rail 13; the pulley 12 located at the lower end of the sliding mass block 5 is slidably set on the outer surface slide rail 14.

[0055] Optionally, the outer surface slide rail 14 is fixed to the outer side of the inner shell 2 in a manner including but not limited to plugging, snapping, bonding, welding, threaded connection, etc. Figure 2 In the illustrated embodiment, threaded holes may be provided on the outer surface rail 14, and the outer surface rail 14 may be fixed to the outer side of the inner housing 2 by means of a threaded connection. The manner in which the inner surface rail 13 is arranged on the inner side of the outer housing 3 is similar to the manner in which the outer surface rail 14 is arranged on the outer side of the inner housing 2, and thus will not be described in detail.

[0056] In the solution of this example, pulleys 12 are provided at both ends of the sliding mass block 5. The number of pulleys 12 at both ends of the sliding mass block 5 can be selected according to actual needs, and this application does not limit the number. Figure 3 In the illustrated embodiment, a pulley 12 is provided at the upper end (close to the outer shell 3 ) of the sliding mass 5 , and two pulleys 12 are provided at the lower end.

[0057] The way the pulley 12 is mounted on the sliding mass block 5 can be selected according to actual needs. Figure 2 In the embodiment shown, grooves for mounting a pulley 12 can be provided on both the upper and lower sides of the sliding mass 5. The pulley 12 can be fixed in the grooves by screws. In addition, the pulley 12 can be connected to the screws by bearings to ensure smooth sliding of the pulley 12.

[0058] Optionally, sliding grooves adapted to the pulley 12 may be provided on both the outer surface sliding rail 14 and the inner surface sliding rail 13 to ensure that the sliding path of the pulley 12 is stable.

[0059] Optionally, the central angle of the arc lines of the inner surface slide rail 13 and the outer surface slide rail 14 may be approximately 60°. This arrangement helps to reduce occupied space.

[0060] The above technical solution helps to ensure that the sliding mass block 5 can slide between the inner shell 2 and the outer shell 3 by arranging the pulley 12 to cooperate with the slide rail, and can reduce the wear between the sliding mass block 5 and the inner shell 2 and the outer shell 3.

[0061] According to another aspect of an embodiment of the present application, a pipeline vibration reduction method is provided, which is applied to the pipeline vibration reduction device of any of the above embodiments.

[0062] Figure 6 FIG1 shows a schematic flow chart of a pipeline vibration reduction method according to an embodiment of the present application. Figure 6 As shown, the method may include the following steps S610, S620, S630, S640 and S650.

[0063] In step S610 , pipeline vibration data collected by the pipeline vibration sensor and sliding mass vibration data collected by the mass vibration sensor are acquired.

[0064] It's understood that the pipeline vibration data collected by the pipeline vibration sensor represents the current vibration of the pipeline to be damped, while the sliding mass vibration data represents the current vibration of the sliding mass. Acquiring these two vibration conditions provides a more accurate basis for adjusting the current in the excitation coil in subsequent steps.

[0065] As described above, the pipeline vibration sensor and the mass vibration sensor can be, for example, a displacement sensor, a velocity sensor, an acceleration sensor, or the like. When the pipeline vibration sensor and the mass vibration sensor are displacement sensors, the collected vibration data is represented by displacement data collected by the displacement sensor. When the pipeline vibration sensor and the mass vibration sensor are velocity sensors, the collected vibration data is represented by velocity data collected by the velocity sensor. When the pipeline vibration sensor and the mass vibration sensor are acceleration sensors, the collected vibration data is represented by acceleration data collected by the acceleration sensor.

[0066] In step S620 , the pipeline vibration data is processed to obtain the pipeline vibration frequency of the pipeline to be damped.

[0067] In this example, the collected pipeline vibration data can be processed to obtain the pipeline vibration frequency of the pipeline to be damped. This processing method includes but is not limited to pre-trained neural networks, algorithms, etc., which will not be described in detail.

[0068] It can be understood that pipeline vibration data includes a series of data that changes over time. For example, using an accelerometer as the pipeline vibration sensor, the series of data collected by the pipeline vibration sensor can be used to obtain the value of acceleration changing over time. Assuming a sampling time of 0.001s, there are 10,000 data points per second. This represents the acceleration trend of the pipeline to be dampened under the current vibration state. By processing this acceleration trend, the pipeline vibration frequency of the pipeline to be dampened can be obtained.

[0069] In step S630 , the vibration data of the sliding proof-mass is processed to obtain the mass vibration frequency of the sliding proof-mass.

[0070] The method for processing the sliding mass vibration data is similar to the method for processing the pipeline vibration data, and will not be described in detail.

[0071] In step S640 , the driving current of the excitation coil is determined based on the vibration frequency of the pipeline and the vibration frequency of the mass block.

[0072] After obtaining the pipeline vibration frequency and the mass vibration frequency, the excitation coil drive current can be determined based on the pipeline vibration frequency and the mass vibration frequency. For example, the excitation coil drive current can be determined based on the difference between the pipeline vibration frequency and the mass vibration frequency to ensure that the vibration frequency of the sliding mass is consistent with the vibration frequency of the pipeline to be damped, thereby achieving a good vibration reduction effect.

[0073] In some embodiments, the pipeline vibration frequency and the mass vibration frequency can be input into a pre-trained neural network model to obtain the driving current of the excitation coil. Of course, the driving current can also be obtained using the calculation method below, which will not be repeated here.

[0074] In step S650, the current of the excitation coil is adjusted according to the driving current so that the vibration frequency of the sliding mass block is the same as the vibration frequency of the pipeline to be damped.

[0075] It is understood that the sequence numbers of the above steps are only for the convenience of distinguishing the steps and do not limit the order in which the steps are executed. For example, step S620 and step S630 can be executed simultaneously or sequentially.

[0076] After determining the driving current, the current of the excitation coil can be adjusted to the driving current. In this way, the magnetic field generated by the excitation coil can change the shear strength of the magnetorheological elastomer, so that the vibration frequency of the sliding mass block is the same as the vibration frequency of the pipeline to be damped, thereby effectively achieving the consumption and vibration reduction of vibration energy.

[0077] The above technical solution can dynamically adjust the driving current of the excitation coil according to the actual vibration conditions of the pipeline to be damped, thereby accurately controlling the shear modulus of the magnetorheological elastomer, enabling it to adapt to a variety of complex vibration situations and achieve a more effective vibration reduction effect.

[0078] Exemplarily, step S610, acquiring pipeline vibration data collected by the pipeline vibration sensor and sliding mass vibration data collected by the mass vibration sensor, is performed when the excitation coil is de-energized. In this exemplary embodiment, both pipeline vibration data and sliding mass vibration data are acquired when the excitation coil is de-energized. In other words, the sliding mass vibration data is acquired when the excitation coil is de-energized. This approach helps simplify the calculation process in subsequent steps, thereby improving computational efficiency and facilitating more accurate determination of the drive current.

[0079] Optionally, the method may further include: when the excitation coil is energized, acquiring current pipeline vibration data collected by the pipeline vibration sensor; determining whether the pipeline vibration frequency has changed based on the current pipeline vibration data and pipeline vibration data collected before the excitation coil was energized; when the pipeline vibration frequency has changed, switching the excitation coil to an unpowered state and recollecting pipeline vibration data and sliding mass block vibration data; and executing steps S620-S650 above based on the recollected pipeline vibration data and sliding mass block vibration data to readjust the driving current of the excitation coil. The above scheme adopts a frequency-adjustable vibration control method, which can achieve multi-dimensional vibration reduction capabilities.

[0080] Exemplarily, determining the driving current of the excitation coil based on the pipeline vibration frequency and the mass vibration frequency includes: determining the driving current by the following formula:

[0081]

[0082] in, is the driving current, is the pipeline vibration frequency, is the vibration frequency of the mass block, is the proportional coefficient of the effect of current on the shear modulus of the magnetorheological elastomer, is the rate of change of the vibration frequency of the mass block as the shear modulus of the magnetorheological elastomer changes.

[0083] In this example, It can be determined based on the vibration data of the sliding mass block. In some embodiments, the vibration spectrum of the sliding mass block can be determined based on the vibration data of the sliding mass block. The rate of change of the vibration frequency of the mass block with the shear modulus of the magnetorheological elastomer is the derivative of the vibration frequency of the sliding mass block with the shear modulus, which can be compared with the vibration spectrum of the sliding mass block. MR The fitting curve can be obtained by differentiating the fitting curve. The fitting curve can be obtained in advance through experiments. The specific determination method is understandable to those skilled in the art and will not be described in detail.

[0084] The formula for determining the drive current in this example can be derived using the following derivation process:

[0085] To achieve the best vibration reduction effect, the vibration frequency of the mass block needs to be equal to the vibration frequency of the pipeline.

[0086] Among them, the shear modulus of the magnetorheological elastomer after the excitation coil is energized is The current in the excitation coil can be expressed as:

[0087]

[0088] Where, The proportional coefficient that represents the effect of current on shear modulus, that is, the sensitivity of current to changes in shear modulus. It represents the shear modulus of the magnetorheological elastomer when the excitation coil is not energized.

[0089] In order to make the mass block vibrate at a frequency and pipeline vibration frequency To match, the current needs to be adjusted to adjust the shear modulus , the required current can be obtained :

[0090]

[0091] Assumptions about The changes in It is linear near , so Taylor expansion is performed, removing the high-order terms and keeping only the first-order terms:

[0092]

[0093] in Can be written as , put it into the above formula, we can get:

[0094]

[0095] Will and known Substitute into the above formula. Therefore, the required input current can be solved :

[0096]

[0097] The above technical solution can quickly and accurately determine the driving current, and can provide a more accurate basis for adjusting the current in the excitation coil in subsequent steps, thereby achieving a more effective vibration reduction effect.

[0098] Exemplarily, step S620, processing the pipeline vibration data to obtain the pipeline vibration frequency of the pipeline to be attenuated, including: processing the pipeline vibration data through fast Fourier transform (FFT) to obtain a vibration spectrum diagram of the pipeline to be attenuated; determining the pipeline vibration frequency based on the vibration spectrum diagram of the pipeline to be attenuated; and / or, step S630, processing the sliding mass block vibration data to obtain the mass block vibration frequency of the sliding mass block, including: processing the sliding mass block vibration data through fast Fourier transform to obtain a vibration spectrum diagram of the sliding mass block; determining the mass block vibration frequency based on the vibration spectrum diagram of the sliding mass block.

[0099] It can be understood that for the N-point sequence , its discrete Fourier transform (DFT) is shown below:

[0100]

[0101] in, is the collected acceleration signal.

[0102] In this example, frequency domain analysis of the pipeline vibration data and the sliding mass vibration data can be performed using a Fast Fourier Transform (FFT) to obtain a vibration spectrum of the pipeline / sliding mass to be damped. It will be understood that a spectrum plot shows how amplitude varies with frequency, with peaks occurring at several frequencies. Low frequencies are generally considered the primary vibration frequency of the structure, so the data with the lowest frequency and peak amplitude can be used as the vibration frequency. Those skilled in the art will appreciate the specific method for determining the vibration frequency of a structure (e.g., the pipeline to be damped and the sliding mass in this context) based on a spectrum plot, and this will not be elaborated on here.

[0103] The above technical solution processes the data using Fast Fourier Transform (FFT), which can quickly and accurately determine the pipeline vibration frequency / mass block vibration frequency, which helps provide a more accurate basis for subsequent steps.

[0104] Optionally, the method in the above embodiment may be implemented by a controller in the device, and the controller may be composed of the following modules:

[0105] Signal collection module: used to obtain pipeline vibration data collected by the pipeline vibration sensor and sliding mass block vibration data collected by the mass block vibration sensor.

[0106] Frequency calculation module: used to process pipeline vibration data to obtain the pipeline vibration frequency of the pipeline to be damped, and to process the sliding mass block vibration data to obtain the mass block vibration frequency of the sliding mass block.

[0107] Current calculation module: used to determine the driving current of the excitation coil based on the pipeline vibration frequency and the mass block vibration frequency.

[0108] Programmable DC source module: used to adjust the current of the excitation coil according to the driving current so that the vibration frequency of the sliding mass block is the same as the vibration frequency of the pipeline to be damped.

[0109] A person skilled in the art will readily understand the structure, working principle, and beneficial effects of the device for implementing the above-mentioned pipeline vibration reduction method by reading the above-mentioned pipeline vibration reduction device. For the sake of brevity, a detailed description thereof will be omitted here.

[0110] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely illustrative and are not intended to limit the scope of the present invention. Various changes and modifications may be made therein by those skilled in the art without departing from the scope and spirit of the present invention. All such changes and modifications are intended to be included within the scope of the present invention as claimed in the appended claims.

[0111] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0112] In the several embodiments provided herein, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is merely a logical functional division. In actual implementation, other division methods may be used. For example, multiple units or components may be combined or integrated into another device, or some features may be omitted or not implemented.

[0113] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0114] Similarly, it should be understood that in order to streamline the present invention and aid in understanding one or more of the various inventive aspects, in the description of exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this approach to the present invention should not be interpreted as reflecting the intention that the claimed invention requires more features than those explicitly recited in each claim. More precisely, as reflected in the corresponding claims, the inventive point is that the corresponding technical problem can be solved with fewer features than all the features of a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present invention.

[0115] Those skilled in the art will understand that, except where mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstract, and drawings), as well as all processes or units of any method or apparatus disclosed herein, may be combined in any combination. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that provides the same, equivalent, or similar purpose.

[0116] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of the present invention and to form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

[0117] The various component embodiments of the present invention may be implemented in hardware, as software modules running on one or more processors, or as a combination thereof. Those skilled in the art will appreciate that, in practice, a microprocessor or digital signal processor (DSP) may be used to implement some or all of the functionality of some modules within a controller according to embodiments of the present invention. The present invention may also be implemented as a device program (e.g., a computer program or computer program product) for performing part or all of the methods described herein. Such a program implementing the present invention may be stored on a computer-readable medium or in the form of one or more signals. Such signals may be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

[0118] It should be noted that the above embodiments illustrate rather than limit the invention, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising several different elements and by means of appropriately programmed computers. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0119] The foregoing description is merely a specific embodiment of the present invention or an illustration of a specific embodiment. The scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be readily conceived by a person skilled in the art within the technical scope disclosed in the present invention are intended to be encompassed by the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A pipeline vibration reduction device, characterized in that: include: An inner shell, an outer shell, a vibration reduction assembly, a controller, a pipeline vibration sensor, and a mass vibration sensor; the inner shell is mounted on the outside of the pipeline to be vibration-reduced, and the inner surface of the inner shell is in close contact with the pipeline to be vibration-reduced; the outer shell is sleeved on the outside of the inner shell; the vibration reduction assembly is provided in multiple groups, and the multiple groups of vibration reduction assemblies are arranged between the inner shell and the outer shell along the circumferential direction; The pipeline vibration sensor is arranged on the pipeline to be subjected to vibration reduction; The vibration reduction assembly includes a sliding mass block, a magnetic conductive assembly, and a magnetorheological elastomer. The sliding mass block is slidably arranged between the inner shell and the outer shell; the magnetorheological elastomer is connected to the sliding mass block; the magnetic conductive assembly is connected to the magnetorheological elastomer; and an excitation coil is provided on the magnetic conductive assembly. The mass vibration sensor is arranged on the sliding mass of any group of the vibration reduction components; The controller is configured to adjust the current of the excitation coil based on data collected by the pipeline vibration sensor and the mass vibration sensor, so that the vibration frequency of the sliding mass is the same as the vibration frequency of the pipeline to be damped; The left and right sides of the sliding mass block are connected to a vibration guide plate, the number of groups of magnetorheological elastomers corresponds to the number of the vibration guide plates; each group of magnetorheological elastomers has two magnetorheological elastomers, and the two magnetorheological elastomers are respectively arranged closely on the front and rear sides of the vibration guide plate; the number of magnetic conductive components corresponds to the number of the vibration guide plates; the magnetic conductive components are respectively connected to the magnetorheological elastomers located on the front and rear sides of the vibration guide plate; Pulleys are provided at both the upper and lower ends of the sliding mass block, an outer surface slide rail is provided on the outer side of the inner shell body, and an inner surface slide rail is provided on the inner side of the outer shell body. The pulley located at the upper end of the sliding mass block is slidably arranged on the inner surface slide rail; the pulley located at the lower end of the sliding mass block is slidably arranged on the outer surface slide rail.

2. The pipeline vibration reduction device according to claim 1, characterized in that: The magnetic conductive assembly includes two magnetic conductive plates and a magnetic conductive part for connecting the two magnetic conductive plates; the two magnetic conductive plates are respectively connected to the magnetorheological elastomers located on the front and rear sides of the vibration guide plate; the excitation coil is wound on the magnetic conductive part.

3. The pipeline vibration reduction device according to claim 2, characterized in that: It also includes a fixing plate, the upper and lower sides of which are respectively fixed to the outer shell and the inner shell; the end of the magnetic conductive plate is connected to the fixing plate.

4. The pipeline vibration reduction device according to claim 3, characterized in that: There is a gap between the end of the vibration guide plate and the fixing plate.

5. The pipeline vibration reduction device according to claim 1, characterized in that: The left and right sides of the sliding mass block are both connected with springs, and one end of the spring away from the sliding mass block is connected to the magnetic conductive component.

6. A pipeline vibration reduction method, characterized in that: Adopting the pipeline vibration reduction device according to any one of claims 1 to 5; The method comprises: Acquiring pipeline vibration data collected by the pipeline vibration sensor and sliding mass block vibration data collected by the mass block vibration sensor; Processing the pipeline vibration data to obtain the pipeline vibration frequency of the pipeline to be vibration-reduced; Processing the sliding mass vibration data to obtain a mass vibration frequency of the sliding mass; determining a driving current of the excitation coil based on the pipeline vibration frequency and the mass vibration frequency; The current of the excitation coil is adjusted according to the driving current so that the vibration frequency of the sliding mass block is the same as the vibration frequency of the pipeline to be damped.

7. The pipeline vibration reduction method according to claim 6, characterized in that: The determining the driving current of the excitation coil based on the pipeline vibration frequency and the mass block vibration frequency includes: determining the driving current by the following formula: in, is the driving current, is the pipeline vibration frequency, is the vibration frequency of the mass block, is the proportional coefficient of the influence of current on the shear modulus of the magnetorheological elastomer, is the rate of change of the vibration frequency of the mass block as the shear modulus of the magnetorheological elastomer changes.

8. The pipeline vibration reduction method according to claim 6, characterized in that: The processing of the pipeline vibration data to obtain the pipeline vibration frequency of the pipeline to be vibration-reduced includes: Processing the pipeline vibration data by fast Fourier transform to obtain a vibration spectrum of the pipeline to be reduced in vibration; Determining the vibration frequency of the pipeline based on the vibration spectrum of the pipeline to be damped; and / or, The processing of the vibration data of the sliding mass block to obtain the mass block vibration frequency of the sliding mass block includes: Processing the vibration data of the sliding mass block by fast Fourier transform to obtain a vibration spectrum of the sliding mass block; The vibration frequency of the mass block is determined based on the vibration spectrum of the sliding mass block.

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