A self-adaptive variable damping flexible spacer for multi-bundled transmission lines and method

Abstract

The application discloses a kind of multi-split transmission line adaptive variable-damping flexible spacer and method, solve the problem that spacer and wire contact in prior art are too hard, with the beneficial effects of flexible contact with transmission line, improve the dissipation of oscillation energy, specific scheme as follows: a kind of multi-split transmission line adaptive variable-damping flexible spacer, including outer shell, outer shell side is equipped with multiple notches, one end of wire clamp damping component is rotatably connected with outer shell, wire clamp damping component is set through the notch, the other end of wire clamp damping component is connected with transmission line, wire clamp damping component includes first gas spring component, the first piston of first gas spring component is connected with screw rod rotating member, screw rod rotating member includes ball screw and ball nut, by the axial movement of ball screw, so that ball nut rotates to reach provide damping effect, magnetorheological-gas spring composite component connects two wire clamp damping components adjacent.

Description

Technical Field

[0001] This invention relates to the field of disaster prevention and mitigation technology for power transmission lines, and in particular to an adaptive variable damping flexible spacer and method for multi-split power transmission lines. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] With the surge in electricity demand and the need for long-distance power transmission, transmission voltage levels are constantly increasing. When the voltage reaches a certain level, the surface electric field strength of a traditional single large-section conductor becomes extremely high, leading to a serious problem—corona discharge. Split conductor technology is an effective way to solve corona discharge. However, this structure, which "divides" a single-phase conductor into multiple independent sub-conductors, makes it difficult to maintain perfectly synchronized movement under wind conditions. When the trajectories of adjacent sub-conductors intersect or become too close in space, violent collisions, friction, and whipping occur. This continuous and repeated mechanical impact can lead to risks such as conductor wear, strand breakage, wire breakage, and hardware damage. To forcibly constrain the relative positions of these independent sub-conductors, maintain their designed spacing, and prevent them from colliding and whipping each other, spacers are typically used.

[0004] Traditional spacers, through their rigid frame and end clamps, rigidly connect the originally independent sub-conductors in a split conductor system at specific locations, forming a unified structural unit. Under the influence of light winds and the conductor's own weight, the spacer's rigid frame effectively resists the tendency of the sub-conductors to shift due to gravity or slight wind loads, preventing them from pulling together or undergoing overall torsional deformation. However, traditional spacers also have certain shortcomings:

[0005] Traditional rigid clamps for spacers have excessively stiff contact with the conductors, resulting in excessive bending stress on the conductors at the inlet and outlet, which easily leads to fatigue breakage.

[0006] It is not capable enough to suppress the oscillation of the second span of the split conductor, and cannot effectively control the amplitude of the oscillation and dissipate the oscillation energy.

[0007] It cannot effectively detect the amplitude of conductor vibration and lacks adaptive adjustment capabilities. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the purpose of this invention is to provide an adaptive variable damping flexible spacer for multi-split transmission lines, which improves the flexibility and energy dissipation efficiency of the spacer while ensuring the required stiffness.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0010] A flexible spacer with adaptive variable damping for multi-split power transmission lines includes an outer shell with multiple notches on its sides. One end of a clamp damping component is rotatably connected to the outer shell, passing through the notches. The other end of the clamp damping component is connected to the power transmission line. The clamp damping component includes a first gas spring component, whose first piston is connected to a lead screw rotating component. The lead screw rotating component includes a ball screw and a ball nut. The axial movement of the ball screw causes the ball nut to rotate, thereby providing damping. A magnetorheological-gas spring composite component connects two adjacent clamp damping components and controls the swing amplitude of the clamp damping components. The magnetorheological-gas spring composite component includes two sets of magnetorheological components, and a second gas spring component connects the two sets of magnetorheological components. An excitation coil and magnetorheological fluid are disposed in the magnetorheological components. The magnetorheological fluid can pass through a throttling channel. The current of the excitation coil is adjustable. The magnetorheological components are connected to the clamp damping components.

[0011] As described above, a multi-split transmission line adaptive variable damping flexible spacer bar includes a clamp vibration damping assembly comprising a cylinder, a first gas spring component formed on one side of the cylinder, and a screw rotation component disposed on the other side of the cylinder. The first gas spring component includes a first piston rod connected to the ball screw, and the other end of the ball screw passes through the end of the cylinder and is connected to the transmission line clamp.

[0012] As described above, in a multi-split transmission line adaptive variable damping flexible spacer, a fixed pressure block is provided inside the cylinder. The first piston rod is in sealed contact with the fixed pressure block and can move axially relative to the fixed pressure block. A bearing is provided circumferentially inside the cylinder on the ball screw. The inner ring of the bearing is connected to a ball nut, and the outer ring of the bearing is in contact with the inner wall of the cylinder. The ball screw and the ball nut are threadedly connected. The ball nut is fixedly connected to a mass block, which is movably arranged relative to the cylinder. During the rotation of the ball nut, the mass block is driven to rotate.

[0013] As described above, in a multi-split transmission line adaptive variable damping flexible spacer, the outer shell supports a rotating column, and a rotating block is provided at one end of the cylinder. The rotating block is fitted onto the rotating column and can rotate relative to the rotating column.

[0014] As described above, in a multi-split transmission line adaptive variable damping flexible spacer, a second piston rod is provided inside the magnetorheological component. The second piston rod passes through the magnetorheological component, and the second piston rods in two sets of magnetorheological components are connected. The ends of the two magnetorheological components away from the second piston rod are respectively connected to a connecting rod, and the connecting rod is connected to the line clamp vibration damping assembly.

[0015] As described above, in a multi-split transmission line adaptive variable damping flexible spacer, the second gas spring component includes four sets of second gas springs, two sets of second gas springs on one side of the second piston rod, and the other two sets of second gas springs on the other side of the second piston rod. The third piston rods of the two second gas springs on one side of the second piston rod are connected, and the third piston rods of the two second gas springs on the other side of the second piston rod are connected. The cylinder of the second gas spring is fixed to the magnetorheological component.

[0016] As described above, a multi-split transmission line adaptive variable damping flexible spacer includes a magnetorheological component comprising a hollow body with two end caps inside. One end cap is connected to one end of a second piston rod, and the second piston rod passes through the other end cap, forming a space between the end caps and the hollow body. The magnetorheological fluid is filled in this space. A magnetic guide ring is also provided between the two end caps in the hollow body. The excitation coil is provided inside the magnetic guide ring, and a magnetic blocking ring is provided in the middle of the magnetic guide ring. A throttling channel is provided inside the magnetic guide ring, and the throttling channel is connected to the flow space of the magnetorheological fluid.

[0017] As described above, in a multi-split transmission line adaptive variable damping flexible spacer, the magnetorheological-gas spring composite component is equipped with a displacement sensor, which is connected to a control unit, and the control unit is connected to the excitation coil.

[0018] The displacement sensor includes a magnetic block disposed around the second piston rod and a coil disposed around the second piston rod. There are two sets of coils, which are spaced apart. The coil is placed inside the second gas spring component and is supported by a magnetorheological component. When the second piston rod moves, it drives the magnetic block to move. When the magnetic block moves inside the coil, an induced electromotive force is generated inside the coil. The induced electromotive force generates an induced current. The coil is connected to the control unit.

[0019] As described above, in a multi-split transmission line adaptive variable damping flexible spacer, a frame-shaped support frame is provided in the middle of the outer shell, and the sides of the outer shell are bent toward the frame-shaped support frame to form flanges. The magnetorheological-gas spring composite component is arranged between the frame-shaped support frame and the flanges, and the distance between two adjacent flanges is to form the notch. The outer shell is connected to the top cover.

[0020] Secondly, the present invention also discloses a method for operating an adaptive variable damping flexible spacer for a multi-split transmission line, comprising the following:

[0021] The wire clamp vibration damping component comes into contact with the transmission line. The transmission line is affected by the airflow and swings, which causes the wire clamp vibration damping component to vibrate. When the wire clamp vibration damping component generates axial movement, the ball screw in the screw rotating component moves axially, causing the ball nut to rotate to provide vibration damping. The axial movement is converted into rotational movement, and the wire clamp vibration damping component plays the role of mitigating the axial vibration of the transmission line.

[0022] When the swing amplitude of the clamp damping component is small, the magnetorheological-gas spring composite component works normally; when the swing amplitude of the clamp damping component increases, the current in the excitation coil of the magnetorheological-gas spring composite component increases, which in turn makes the magnetorheological fluid more viscous, further increasing the resistance to the swaying of the clamp damping component.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1) In this invention, a wire clamp vibration damping component is set as a new type of wire clamp. The wire clamp vibration damping component includes a first gas spring component and a lead screw rotating component. The lead screw rotating component can convert axial motion into rotational motion to provide a vibration damping effect. In conjunction with the first gas spring component, it replaces the traditional rigid metal wire clamp, allowing the wire clamp to generate a certain axial motion and rotation, improving the flexibility of the wire clamp and reducing the risk of conductor fatigue and strand breakage.

[0025] The clamp vibration damping assembly is rotatably connected to the outer shell, and magnetorheological-gas spring composite assemblies are provided on both sides. The viscosity of the magnetorheological fluid in the throttling channel is adjusted by adjusting the current in the excitation coil of the magnetorheological-gas spring composite assembly, thereby adjusting the damping magnitude. This forms a multi-directional energy dissipation device, which further improves the overall energy dissipation efficiency of the spacer. The first and second gas spring components serve as stiffness elements, and the gas spring has a relatively large nonlinear restoring force, which better constrains the relative position between the transmission lines.

[0026] 2) In this invention, the magnetorheological-gas spring composite component is connected to the wire clamp vibration damping component at both ends. The wire clamp vibration damping component will drive the magnetorheological-gas spring composite component to move during the swinging process. The magnetorheological-gas spring composite component has a reasonable structure. The magnetorheological component is located on both sides of the second gas spring component. The viscosity of the magnetorheological fluid is adjusted by the magnitude of the current of the excitation coil, thereby achieving the purpose of changing the magnitude of its own damping force.

[0027] 3) This invention incorporates a displacement sensor, which is formed by a magnetic block and a coil arranged circumferentially on the second piston rod. The magnetic block can slide with the second piston rod inside the coil. During the movement of the magnetic block inside the coil, an induced electromotive force is generated inside the coil, which generates an induced current. The magnitude of the generated current is proportional to the distance the magnetic block moves in the coil. With the use of magnetorheological components, adaptive variable damping control of the magnetorheological-gas spring composite component is realized, improving the adaptability of the spacer bar.

[0028] 4) In this invention, there are 4 sets of second gas spring components, some of which are located on one side of the second piston rod and some of which are located on the other side of the second piston rod. Moreover, the third piston rods of the two second gas springs located on the same side of the second piston rod are connected. The third piston in the second gas spring compresses the gas, which breaks the pressure balance on both sides of the third piston, so that the third piston is subjected to a force opposite to the movement, which provides a certain stiffness for limiting the shaking of the wire clamp vibration damping assembly.

[0029] 5) The present invention comprises a novel wire clamp that converts the original axial motion into rotational motion through a wire clamp vibration damping component. This not only improves the energy dissipation effect of the wire clamp but also compensates for the lack of flexibility in traditional wire clamps. The wire clamp vibration damping component is rotatably connected to the outer shell. Magnetorheological-gas spring composite components are provided on both sides of the wire clamp vibration damping component, realizing dual energy dissipation in both axial and rotational directions. The magnetorheological-gas spring composite components are used to control the swing amplitude of the wire clamp vibration damping component. The whole structure forms a multi-directional energy dissipation system, which improves the efficiency of oscillation energy dissipation and effectively solves the problems of traditional spacer bars being too rigid and lacking flexibility, having low energy dissipation efficiency, and lacking detection components. Attached Figure Description

[0030] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0031] Figure 1 This is a schematic diagram of an adaptive variable damping flexible spacer for a multi-split transmission line according to one or more embodiments of the present invention.

[0032] Figure 2 This is a top view of an adaptive variable damping flexible spacer for a multi-split transmission line according to one or more embodiments of the present invention.

[0033] Figure 3 This is a cross-sectional schematic diagram of a vibration reduction component of a multi-split transmission line adaptive variable damping flexible spacer bar clamp according to one or more embodiments of the present invention.

[0034] Figure 4 This is a cross-sectional schematic diagram of a magnetorheological-gas spring composite component in an adaptive variable damping flexible spacer for a multi-split transmission line according to one or more embodiments of the present invention.

[0035] Figure 5 This is the present invention. Figure 4 Enlarged schematic diagram of the second gas spring component at point B.

[0036] Figure 6 This is the present invention. Figure 4 Enlarged schematic diagram of point A (magnetorheological component).

[0037] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0038] The components are: 1. Outer shell, 11. Rotating column, 12. Control unit, 2. Top cover, 3. Wire clamp vibration damping assembly, 31. Rotating block, 32. Power transmission clamp, 33. Ball screw, 34. Ball nut, 35. First piston rod, 36. Mass block, 37. Fixed pressure block, 38. Cylinder, 39. First piston, 40. Bearing, 4. Magnetorheological-gas spring composite assembly, 41. Connecting rod, 42. Hollow body, A1. Magnetorheological fluid, A2. Magnetic ring, A3. Magnetic blocking ring, A4. End cover, A5. Excitation coil, A6. Throttling channel, A7. Second piston rod, B1. Cylinder, B2. Third piston, B3. Third piston rod, B4. Magnetic block, B5. Coil, B6. Tank. Detailed Implementation

[0039] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] As described in the background section, existing technologies suffer from problems such as excessively rigid contact between the spacer and the conductor, and insufficient ability to suppress conductor oscillation. To address these technical issues, this invention proposes an adaptive variable damping flexible spacer for multi-split transmission lines.

[0042] Example 1

[0043] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a multi-split transmission line adaptive variable damping flexible spacer includes an outer shell 1, a top cover 2, a wire clamp vibration damping component 3, and a magnetorheological-gas spring composite component 4. The outer shell 1 has a notch, the wire clamp vibration damping component 3 is located at the notch and is connected to the outer shell 1. The two sides of the wire clamp vibration damping component 3 are connected to the magnetorheological-gas spring composite component 4. The magnetorheological-gas spring composite component 4 is used to control the swing amplitude of the wire clamp vibration damping component 3.

[0044] In this embodiment, the outer shell 1 is hollowed out in the middle, which helps to reduce the impact of airflow on the device. A frame-shaped support frame is provided in the middle of the outer shell 1, and the sides of the outer shell 1 are bent towards the frame-shaped support frame to form flanges. The magnetorheological-gas spring composite assembly 4 is arranged between the frame-shaped support frame and the flanges. The distance between two adjacent flanges is to form a notch. The outer shell 1 is connected to the top cover 2.

[0045] refer to Figure 1 and Figure 2 As shown, the bottom of the outer casing 1 is rectangular, and four notches are provided on the periphery of the outer casing 1. Rotating columns 11 are installed at the notches, and the rotating columns 11 are located near the frame support frame. The rotating columns 11 are located on the outer sides of the four corners of the frame support frame. The rotating columns 11 are rotatably connected to the wire clamp vibration damping assembly 3 through rotating blocks 31. The wire clamp vibration damping assembly 3 contacts the transmission line through the transmission line clamp 32. The transmission line is affected by airflow and swings, thereby causing the wire clamp vibration damping assembly 3 to vibrate. The wire clamp vibration damping assembly 3 alleviates the axial vibration of the transmission line to a certain extent.

[0046] For details, please refer to Figure 2 and Figure 3 As shown, the wire clamp vibration damping assembly 3 includes a rotating block 31, a power transmission clamp 32, a ball screw 33, a ball nut 34, a first piston rod 35, a mass block 36, a fixing block 37, a cylinder 38, a first piston 39, and a bearing 40. The power transmission clamp 32 is fixedly connected to the ball screw 33, and the rotating block 31 is fixedly connected to the cylinder 38. The rotating block 31 is sleeved around the rotating column 11 in the circumferential direction. The ball screw 33 is connected to the first piston 39, which is placed inside the cylinder 38. This connection method allows the wire clamp vibration damping assembly 3 to rotate to a certain extent. The rotating column 11 is positioned close to the center of the outer shell 1 so that the cylinder 38 extends out from the notch in the outer shell 1. The two sides of the cylinder 38 are respectively connected to the corresponding magnetorheological-gas spring composite assembly 4. A fixing block 37 is provided inside the cylinder 38. The fixing block 37 and the bearing 40 are connected to the cylinder 38. Two sets of bearings 40 are supported at the end of the cylinder 38, with a distance between them. The inner ring of one bearing 40 is connected to the ball nut 34, and the inner ring of the other bearing is connected to the mass block 36. The outer ring of the bearing 40 is in contact with the inner wall of the cylinder, allowing the ball nut 34 to rotate relative to the cylinder 38. The first piston 39 is fixedly connected to the first piston rod 35, and the first piston rod 35 is connected to the ball screw 33. During the axial movement of the ball screw 33, the first piston 39 compresses gas to generate damping force. The above design improves the flexibility of the wire clamp vibration damping assembly 3 while ensuring rigidity.

[0047] The ball nut 34 is placed around the ball screw 33, and the ball screw 33 and the ball nut 34 are threadedly connected. When the clamp damping assembly 3 generates axial movement, the ball screw 33, the bearing 40 and the ball nut 34 work together to convert the axial movement into rotational movement, which is equivalent to forming an inertial-capacitive element (providing damping effect to improve vibration control). The ball nut 34 is fixedly connected to the mass block 36. The ball nut 34 is provided with a convex ring around its circumference to engage with the concave part of the inner circumferential surface of the mass block 36. The mass block 36 is a ring structure and is located between the two bearings 40. The mass block 36 can rotate relative to the cylinder 38. During the rotation of the ball nut 34, the mass block 36 is driven to rotate. The ball nut 34 can convert the axial movement of the ball screw 33 into rotational movement. Through the axial movement of the ball screw 33, the ball nut 34 and the mass block 36 rotate to provide vibration damping and further improve energy consumption.

[0048] refer to Figure 4 , Figure 5 and Figure 6 As shown, the magnetorheological-gas spring composite assembly 4 includes a second gas spring component and a magnetorheological component. The magnetorheological component is placed on both sides of the second gas spring component. The second piston rods A7 in the two sets of magnetorheological components are connected. The second gas spring component includes four sets of second gas springs, of which two sets of second gas springs are on one side of the second piston rod A7, and the other two sets of second gas springs are on the other side of the second piston rod A7. The third piston rods B3 in the two second gas springs on the upper side of the second piston rod A7 are connected, and the third piston rods B3 in the two second gas springs on the lower side of the second piston rod A7 are connected. The cylinder B1 of the second gas spring is fixed at the hollow body 42 of the magnetorheological component. The ends of the two magnetorheological components away from the second piston rod A7 are respectively provided with connecting rods 41. The hollow body 42 is connected to the connecting rods 41. The connecting rods 41 are used to connect with the cylinder 38 in the wire clamp vibration damping assembly 3.

[0049] The magnetorheological component specifically includes a hollow body 42, a magnetorheological fluid A1, a magnetically conductive ring A2, a magnetically resistive ring A3, an end cap A4, an excitation coil A5, a throttling channel A6, and a second piston rod A7. Two end caps A4 are provided inside the hollow body 42. One end cap A4 is connected to the second piston rod A7, and the second piston rod A7 passes through the other end cap A4. A flow space for the magnetorheological fluid A1 is formed between the end caps A4 and the hollow body 42. The magnetorheological fluid A1 fills the space and flows inside the hollow body 42. The two second piston rods A7 are connected as one unit.

[0050] The second gas spring includes a cylinder B1, a third piston B2, a third piston rod B3, a magnetic block B4, a coil B5, and a groove B6. The third piston rod B3 is fixedly connected to the third piston B2. A throttling channel A6 is provided inside the magnetic ring A2. An opening is provided on the end plate A4 to allow the throttling channel A6 to communicate with the flow space of the magnetorheological fluid A1. The diameter of the opening is larger than the diameter of the throttling channel A6 to facilitate the flow of the magnetorheological fluid A1 into the throttling channel A6. The magnetic ring A2 is set along the axial direction of the hollow body 42 and fits against the inner wall of the hollow body 42. A magnetic blocking ring A3 is provided in the middle section of the magnetic ring A2. The magnetic blocking ring A3 is set along the longitudinal section of the hollow body 42 and is perpendicular to the magnetic ring A2. When there is no magnetic blocking ring A3, the magnetic field direction is along the magnetic ring A2. With the magnetic blocking ring A3, the magnetic field passes through the throttling channel A6, thereby acting on the magnetorheological fluid A1.

[0051] A magnetic block B4 is located at the middle of the second piston rod A7. The magnetic block B4 is fixedly connected to the second piston rod A7. A coil B5 is arranged circumferentially on the second piston rod A7. There are two sets of coils B5. One set of coils B5 is located between the two upper and lower second gas springs on one side of the second piston rod A7. The other set of coils B5 is located between the other two upper and lower second gas springs. The two sets of coils B5 are spaced apart. The magnetic block B4 can slide with the second piston rod A7 within the coil B5. During the movement of the magnetic block B4 within the coil B5, an induced electromotive force is generated within the coil B5. The induced electromotive force generates an induced current. The magnitude of the current is proportional to the distance the magnetic block B4 moves within the coil B5. The greater the distance the magnetic block B4 moves, the greater the induced current. This allows the detection of the degree of swaying of the transmission line and transmits the data to the control unit 12. The control unit 12 is fixed to the side wall of the outer casing 1. The control unit is specifically a PLC controller or other type of controller. The control unit 12 can adjust the current of the excitation coil A5. The two sets of coils B5 are configured such that one coil B5 corresponds to one excitation coil A5, and the other coil B5 corresponds to the other excitation coil A5. The control unit 12 controls the current of the corresponding excitation coil A5 according to the magnitude of the induced current in the coil B5 on the same side.

[0052] When the transmission line is stationary, the magnetorheological-gas spring composite assembly 4 is in equilibrium. When the amplitude of the second piston rod A7 swaying increases, the current in the excitation coil A5 also increases. The magnetorheological fluid A1 entering the throttling channel A6 becomes more viscous, the damping force of the magnetorheological-gas spring composite assembly 4 increases, and the swaying of the clamp vibration damping assembly 3 is restricted. When the clamp vibration damping assembly 3 sways, the second gas spring compresses the gas through the third piston B2, breaking the pressure balance on both sides of the third piston B2, so that the third piston B2 is subjected to a force opposite to the motion, which provides a certain stiffness to restrict the swaying of the clamp vibration damping assembly 3.

[0053] The device provided in this embodiment combines a magnetorheological damper with a displacement sensor to achieve adaptive variable damping control of the magnetorheological damper. A lead screw rotating component and a gas spring are connected in series to form a novel wire clamp. The original axial motion of the lead screw rotating component is converted into rotational motion, improving the energy dissipation effect of the wire clamp. The wire clamp vibration damping assembly 3 is rotatably connected to the outer shell 1. Magnetorheological-gas spring composite assemblies 4 are provided on both sides of the wire clamp vibration damping assembly 3, achieving dual energy dissipation in both axial and rotational directions. The stiffness element mainly uses a gas spring, which has a relatively large nonlinear restoring force, better constraining the relative position between the sub-transmission lines.

[0054] Example 2

[0055] This embodiment provides a method for operating an adaptive variable damping flexible spacer in a multi-split transmission line, including the following:

[0056] The clamp vibration damping component 3 comes into contact with the transmission line. The transmission line is affected by the airflow and swings, which causes the clamp vibration damping component 3 to vibrate. When the clamp vibration damping component 3 generates axial movement, the ball screw 33 in the screw rotating component moves axially, and the ball nut 34 rotates to provide vibration damping, converting axial movement into rotational movement. The clamp vibration damping component 3 plays the role of mitigating the axial vibration of the transmission line.

[0057] The magnetorheological-gas spring composite assembly 4 is connected to the wire clamp damping assembly 3 at both ends. During its oscillation, the wire clamp damping assembly 3 drives the magnetorheological-gas spring composite assembly 4. The magnetorheological-gas spring composite assembly 4 adjusts the viscosity of the magnetorheological fluid A1 by controlling the current in the excitation coil A5, thereby changing its damping force. When the oscillation amplitude of the wire clamp damping assembly 3 is small, the magnetorheological-gas spring composite assembly 4 operates normally. When the oscillation amplitude of the wire clamp damping assembly 3 increases, the current in the excitation coil A5 of the magnetorheological-gas spring composite assembly 4 increases, making the magnetorheological fluid A1 more viscous and further increasing the resistance to the oscillation of the wire clamp damping assembly 3.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A flexible spacer bar for multi-split transmission lines with adaptive variable damping, characterized in that, The device includes an outer casing with multiple notches on its sides. One end of the wire clamp vibration damping assembly is rotatably connected to the outer casing, and the assembly passes through the notches. The other end of the assembly is connected to the power transmission line. The assembly includes a first gas spring component, whose first piston is connected to a lead screw rotating component. The lead screw rotating component includes a ball screw and a ball nut. The axial movement of the ball screw causes the ball nut to rotate, generating inertial force to provide vibration damping. A magnetorheological-gas spring composite assembly connects two adjacent wire clamp vibration damping assemblies. This assembly controls the swing amplitude of the wire clamp vibration damping assembly. The assembly includes two sets of magnetorheological components, and a second gas spring component connects the two sets. Each magnetorheological component contains an excitation coil and a magnetorheological fluid. The magnetorheological fluid can pass through a throttling channel. The current of the excitation coil is adjustable. The magnetorheological components are connected to the wire clamp vibration damping assembly. The magnetorheological component is provided with a second piston rod inside, which passes through the magnetorheological component. The second piston rods in the two sets of magnetorheological components are connected. The ends of the two magnetorheological components away from the second piston rod are respectively connected to a connecting rod, which is connected to the wire clamp vibration damping assembly. The magnetorheological component includes a hollow body with two end caps inside. One end cap is connected to one end of the second piston rod, and the second piston rod passes through the other end cap, forming a space between the end caps and the hollow body. The magnetorheological fluid is filled in this space. A magnetic guide ring is also provided between the two end caps in the hollow body. The excitation coil is provided inside the magnetic guide ring, and a magnetic blocking ring is provided in the middle of the magnetic guide ring. The throttling channel is provided inside the magnetic guide ring and is connected to the flow space of the magnetorheological fluid.

2. The adaptive variable damping flexible spacer for a multi-split transmission line according to claim 1, characterized in that, The clamp vibration damping assembly includes a cylinder, with the first gas spring component formed on one side of the cylinder and the screw rotation component provided on the other side of the cylinder. The first gas spring component includes a first piston rod, which is connected to the ball screw. The other end of the ball screw passes through the end of the cylinder and is connected to the power transmission clamp.

3. The adaptive variable damping flexible spacer for a multi-split transmission line according to claim 2, characterized in that, A fixed pressure block is provided inside the cylinder. The first piston rod is in sealed contact with the fixed pressure block. The first piston rod can move axially relative to the fixed pressure block. A bearing is provided circumferentially inside the cylinder on the ball screw. The inner ring of the bearing is connected to the ball nut. The outer ring of the bearing is in contact with the inner wall of the cylinder. The ball screw and the ball nut are threadedly connected. The ball nut is fixedly connected to the mass block. The mass block is movably set relative to the cylinder. The mass block rotates during the rotation of the ball nut.

4. The adaptive variable damping flexible spacer for a multi-split transmission line according to claim 2, characterized in that, The outer shell supports the rotating column, and a rotating block is provided at one end of the cylinder. The rotating block is fitted onto the rotating column and can rotate relative to the rotating column.

5. The adaptive variable damping flexible spacer for a multi-split transmission line according to claim 1, characterized in that, The second gas spring component includes four sets of second gas springs, two of which are on one side of the second piston rod and the other two on the other side of the second piston rod. The third piston rods of the two second gas springs on one side of the second piston rod are connected, and the third piston rods of the two second gas springs on the other side of the second piston rod are connected. The cylinder of the second gas spring is fixed to the magnetorheological component.

6. The adaptive variable damping flexible spacer for a multi-split transmission line according to claim 1, characterized in that, The magnetorheological-gas spring composite component is equipped with a displacement sensor, which is connected to a control unit, and the control unit is connected to the excitation coil. The displacement sensor includes a magnetic block disposed around the second piston rod and a coil disposed around the second piston rod. There are two sets of coils, which are spaced apart. The coil is placed inside the second gas spring component and is supported by a magnetorheological component. When the second piston rod moves, it drives the magnetic block to move. When the magnetic block moves inside the coil, an induced electromotive force is generated inside the coil. The induced electromotive force generates an induced current. The coil is connected to the control unit.

7. The adaptive variable damping flexible spacer for a multi-split transmission line according to claim 1, characterized in that, A frame-shaped support frame is provided in the middle of the outer shell. The sides of the outer shell are bent toward the frame-shaped support frame to form flanges. The magnetorheological-gas spring composite assembly is arranged between the frame-shaped support frame and the flanges. The distance between two adjacent flanges is to form the notch. The outer shell is connected to the top cover.

8. The operating method of an adaptive variable damping flexible spacer for a multi-split transmission line according to any one of claims 1-7, characterized in that, Includes the following: The wire clamp vibration damping component comes into contact with the transmission line. The transmission line is affected by the airflow and swings, which causes the wire clamp vibration damping component to vibrate. When the wire clamp vibration damping component generates axial movement, the ball screw in the screw rotating component moves axially, causing the ball nut to rotate and generate inertial force to provide vibration damping. The axial movement is converted into rotational movement, and the wire clamp vibration damping component plays the role of mitigating the axial vibration of the transmission line. When the swing amplitude of the clamp damping component is small, the magnetorheological-gas spring composite component works normally; when the swing amplitude of the clamp damping component increases, the current in the excitation coil of the magnetorheological-gas spring composite component increases, which in turn makes the magnetorheological fluid more viscous, further increasing the resistance to the swaying of the clamp damping component.

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