A cable energy dissipation and vibration reduction device, system and working method

Abstract

This invention provides a cable energy dissipation and vibration reduction device, system, and operating method, relating to the bridge engineering field. Addressing the problem that current cable vibration control methods struggle to cope with varying wind load conditions, this invention converts the linear vibration of the cable into rotational motion using a screw-slider mechanism. A bevel gear differential drives the auxiliary input cylinder and the first energy dissipation cylinder to rotate in the opposite direction to the damping blades on the main input shaft. This creates a coaxial, reverse shearing motion between the damping blades and the first energy dissipation cylinder, increasing the viscous drag torque generated per unit time and thus improving energy dissipation efficiency. Simultaneously, the reset component accumulates elastic potential energy during the rotation of the main input shaft and the auxiliary input cylinder. When the cable tension decreases or changes direction, the reset component releases this potential energy to provide an active restoring force, driving the main input shaft and the auxiliary input cylinder to rotate in opposite directions, guiding the nut slider to reset, effectively reducing the recovery resistance of the device after vibration attenuation.

Description

Technical Field

[0001] This invention relates to the field of bridges, and specifically to a cable energy dissipation and vibration reduction device, system, and working method. Background Technology

[0002] Currently, in long-span bridge engineering, cables are widely used as key load-bearing components in cable-stayed bridges, suspension bridges, and temporary construction tower structures, playing a role in stabilizing bridge towers and resisting wind loads. However, due to their low damping and high flexibility, cables are prone to large-scale vibrations under wind loads or wind-rain coupling.

[0003] Existing vibration control methods typically employ mechanical dampers, such as viscous dampers or friction dampers, installed at the cable ends to dissipate vibration energy. These dampers primarily dissipate energy through simple linear reciprocating shear or fixed-wall shear, and the effective shear rate of the damping fluid is limited. Faced with complex and variable wind loads, cable vibration exhibits a wide range of amplitude and frequency variations with strong randomness. Traditional single energy dissipation modes and limited shear rates struggle to consistently provide efficient damping across a broad frequency range, resulting in low energy dissipation efficiency and poor adaptability. Summary of the Invention

[0004] In view of this, the present invention provides a cable energy dissipation and vibration reduction device, system and working method, which can achieve adaptive vibration energy dissipation according to wind load conditions and ensure shear energy dissipation efficiency.

[0005] The first objective of this invention is to provide a cable energy dissipation and vibration reduction device, which adopts the following solution: Cable, connected with a nut slider; The main input shaft is rotatably mounted inside the housing. Along the axial direction, it is provided with a threaded section, a transmission section, and a blade section. The threaded section, together with the nut and slider, forms a screw-slider mechanism, which can convert the tensioning action of the cable into the rotational action of the main input shaft. The blade section is fitted with damping blades. The auxiliary input cylinder is sleeved outside the transmission section of the main input shaft and cooperates with the main input shaft through a bevel gear differential to rotate synchronously in opposite directions. The auxiliary input cylinder is connected to the first energy dissipation cylinder sleeved outside the blade section. The first energy dissipation cylinder is filled with damping fluid for the damping blades to be immersed in. The reset assembly is connected between the housing and the main input shaft, and between the housing and the auxiliary input cylinder.

[0006] Furthermore, the main input shaft is also provided with a second energy-consuming section, which is connected to a cylindrical cam. The cylindrical cam is equipped with a linkage rod to convert the rotational motion into a telescopic motion. The end of the linkage rod is connected to a disc inserted into the second energy-consuming cylinder. The second energy-consuming cylinder contains a non-Newtonian fluid that impedes the movement of the disc. The bottom of the second energy-consuming cylinder is connected to the first end of the bottom of the spiral tube. The spiral tube is wrapped around the second energy-consuming cylinder. The second end of the top of the spiral tube is sealed and pre-filled with air.

[0007] Furthermore, the reset assembly between the main input shaft and the housing is connected to the second energy-consuming section.

[0008] Furthermore, the bevel gear differential includes a wheel frame and a bevel gear set. The wheel frame is installed inside the housing. The main input shaft and the auxiliary input cylinder are respectively equipped with bevel gears. The bevel gears that are equipped with each other are driven by the bevel gears mounted on the wheel frame to rotate synchronously in opposite directions.

[0009] Furthermore, an energy-consuming cavity is formed inside the first energy-consuming cylinder, the main input shaft coaxially passes through the first energy-consuming cylinder and is provided with a rotation seal at the penetration position, and a turbulence block is provided on the circumferential inner wall of the energy-consuming cavity.

[0010] Furthermore, the blade section is fitted with a one-way bearing, and the outer ring of the one-way bearing is connected to the damping blade through a clutch. The clutch can operate when the blade section reaches a set speed range under a set direction, so that the blade section drives the damping blade to rotate synchronously. Permanent magnets are respectively installed on both ends of the cavity inside the first energy dissipation cylinder along the axial direction, and the opposite magnetic poles of the permanent magnets installed on both ends are distributed oppositely to form a magnetic coupling pair. The damping blade is a closed ring conductor, which cuts the magnetic field lines formed by the magnetic coupling pair when rotating, so as to generate eddy current damping.

[0011] Furthermore, the outer shell is a hollow cylindrical structure with heat dissipation holes on its outer circumferential wall and a connecting part at one end for use with an external fixing structure.

[0012] A second objective of the present invention is to provide a cable energy dissipation and vibration reduction system, utilizing the cable energy dissipation and vibration reduction device as described in the first objective.

[0013] A third objective of this invention is to provide a method for operating a cable energy dissipation and vibration reduction device, utilizing the cable energy dissipation and vibration reduction device as described in the first objective, comprising: When the cable is excited and produces axial vibration, it drives the nut slider to move back and forth along the axial direction of the outer shell. The linear displacement of the cable is converted into the rotational motion of the main input shaft through the screw slider mechanism. The rotational motion of the main input shaft drives the bevel gear differential through the transmission section, driving the auxiliary input cylinder to rotate synchronously in the opposite direction to the main input shaft; the damping blades of the blade section and the first energy dissipation cylinder driven by the auxiliary input cylinder rotate in opposite directions on the same axis. Inside the first energy dissipation cylinder, the counter-rotating cylinder wall and the damping blades together exert a shearing effect on the damping fluid filled in the middle. By increasing the relative rotational speed between the damping blades and the damping fluid, the viscous resistance torque per unit time is increased, and the vibration energy of the cable is converted into the heat energy of the damping fluid. While the main input shaft and the auxiliary input cylinder rotate, the reset component deforms and accumulates elastic potential energy. When the tension of the cable decreases or changes direction, the reset component releases potential energy, driving the main input shaft and the auxiliary input cylinder to rotate in the opposite direction, guiding the nut slider to reset, and preparing for energy consumption in the next vibration cycle.

[0014] Furthermore, the outer shell is inserted into the anchor position for fixation, and multiple cable energy dissipation and vibration reduction devices are connected to the bridge tower through cables to jointly suppress the vibration of the bridge tower.

[0015] Compared with the prior art, the advantages and positive effects of this invention are: To address the challenge of current cable vibration control methods struggling to handle varying wind loads, this invention utilizes a screw-slider mechanism to convert the linear vibration of the cable into rotational motion. A bevel gear differential drives the auxiliary input cylinder and the first energy-consuming cylinder to rotate in the opposite direction to the damping blades on the main input shaft. This creates a coaxial, reverse shearing motion between the damping blades and the first energy-consuming cylinder. Compared to existing technologies that use unilateral rotation or fixed-wall shearing, this coaxial, reverse rotation significantly increases the effective shear rate of the damping fluid, enhancing the viscous drag torque generated per unit time and providing damping over a wide frequency range, thereby improving energy efficiency. Simultaneously, the reset component accumulates elastic potential energy during the rotation of the main input shaft and auxiliary input cylinder. When the cable tension decreases or reverses direction, the reset component releases this potential energy to provide an active restoring force, driving the main input shaft and auxiliary input cylinder to rotate in the opposite direction, guiding the nut slider to reset. This effectively reduces the recovery resistance after vibration attenuation, ensuring the cable quickly returns to its initial equilibrium position. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the internal structure of the cable energy dissipation and vibration reduction device in Embodiments 1, 2 and 3 of the present invention.

[0018] Figure 2 This is a schematic diagram of the one-way bearing and clutch in Embodiments 1, 2 and 3 of the present invention.

[0019] Figure 3 This is a schematic diagram of the outer shell in Embodiments 1, 2 and 3 of the present invention.

[0020] The components are as follows: 1. Cable; 2. Nut slider; 3. Threaded section; 4. First bevel gear; 5. Third bevel gear; 6. Second bevel gear; 7. Housing; 8. Main input shaft; 9. Auxiliary input cylinder; 10. One-way bearing; 11. Trigger spring; 12. Steel ball; 13. Engagement groove; 14. Damping fluid; 15. Damping blade; 16. First energy dissipation cylinder; 17. Turbulence block; 18. Permanent magnet; 19. Cylindrical cam; 20. Helical groove; 21. Linkage rod; 22. Second energy dissipation cylinder; 23. Disc; 24. Non-Newtonian fluid; 25. Reset assembly; 26. Helical tube. Detailed Implementation

[0021] Example 1 In a typical embodiment of the present invention, such as Figure 1 - Figure 3 As shown, a cable energy dissipation and vibration reduction device is presented.

[0022] The conventional damper connected to cable 1 is unable to cope with complex and ever-changing wind load conditions. When the vibration amplitude and frequency vary widely, it is difficult to provide sufficient and matched damping effect, resulting in low energy consumption efficiency and poor adaptability.

[0023] In this regard, such as Figure 1 - Figure 3 As shown in the figure, this embodiment provides a cable energy dissipation and vibration reduction device.

[0024] It mainly includes a cable 1, a nut slider 2, a main input shaft 8, a secondary input cylinder 9, a housing 7, and a reset assembly 25. The cable 1 is connected to the nut slider 2, which is slidably disposed within the housing 7. The main input shaft 8 is rotatably mounted within the housing 7, allowing the main input shaft 8 to rotate relative to the housing 7.

[0025] The main input shaft 8 is provided with a threaded section 3, a transmission section, and a blade section in sequence along its axial direction. The threaded section 3, in conjunction with the nut slider 2, forms a screw-slider mechanism, which converts the tensioning action of the cable 1 into the rotational action of the main input shaft 8. In practical applications, when the cable 1 vibrates axially due to wind load, or when the connected bridge tower vibrates due to wind load, the tension on the end of the cable 1 connected to the nut slider 2 is applied to the nut slider 2, thereby driving the nut slider 2 to move axially along the outer casing 7. Since the nut slider 2 meshes with the threaded section 3 of the main input shaft 8, this linear movement is converted into the rotational motion of the main input shaft 8 around its axis.

[0026] Understandably, the nut slider 2 can be a nut structure with an internal threaded hole, which has a high load-bearing capacity, or it can be a ball nut structure to reduce friction loss. Both can realize the mechanical transmission of converting linear displacement into rotational motion.

[0027] A secondary input cylinder 9 is sleeved outside the transmission section of the main input shaft 8. The secondary input cylinder 9 rotates synchronously in opposite directions with the main input shaft 8 via a bevel gear differential. The bevel gear differential, as the core transmission component, enables power transmission from the main input shaft 8 to the secondary input cylinder 9 through the meshing of its internal gear set. When the main input shaft 8 rotates in the first direction, the gear set forces the secondary input cylinder 9 to rotate in the opposite direction to the main input shaft 8.

[0028] The relative speed adjustment of the main input shaft 8 and the auxiliary input cylinder 9 can be achieved by adjusting the transmission ratio of the gear set, thereby configuring the main input shaft 8 and the auxiliary input cylinder 9 to operate in opposite directions with the same speed, or in opposite directions with different speeds. The main input shaft 8 and the auxiliary input cylinder 9 are coaxially coupled. To ensure smooth relative rotation and reduce jamming or interference, an isolation bearing can be installed between the main input shaft 8 and the auxiliary input cylinder 9. Utilizing the opposite rotation of the main input shaft 8 and the auxiliary input cylinder 9, the components connected to the main input shaft 8 and the components connected to the auxiliary input cylinder 9 can achieve a superposition of relative speeds, providing the operational basis for subsequent energy consumption processes.

[0029] like Figure 1 As shown, the auxiliary input cylinder 9 is connected to the first energy dissipation cylinder 16, which is sleeved outside the blade section. The first energy dissipation cylinder 16 is filled with damping fluid 14 for the damping blade 15 to be immersed in. The first energy dissipation cylinder 16 is mounted inside the housing 7 via bearings and can rotate relative to the housing 7. The damping blade 15 is sleeved outside the blade section of the main input shaft 8. The damping blade 15 can be configured to rotate coaxially and synchronously with the blade section. In this structure, based on the above transmission relationship, when the main input shaft 8 rotates, the damping blade 15 rotates accordingly; at the same time, the auxiliary input cylinder 9 drives the first energy dissipation cylinder 16 to rotate in the opposite direction.

[0030] Inside the first energy dissipation cylinder 16, a reverse shear motion is formed between the damping blade 15 and the inner wall of the first energy dissipation cylinder 16. The damping fluid 14 fills the gap between the damping blade 15 and the cylinder wall. When the two rotate in opposite directions, the damping fluid 14 is subjected to enhanced shearing action. Compared with the traditional single linear reciprocating shear or static shear mode, the reverse rotation increases the fluid shear rate by a factor of two, thereby significantly increasing the viscous drag torque per unit time, and efficiently converting the vibration mechanical energy of the cable 1 into the heat energy of the damping fluid 14 and dissipating it.

[0031] The reset assembly 25 is connected between the housing 7 and the main input shaft 8, and between the housing 7 and the auxiliary input cylinder 9. The reset assembly 25 can be a torsion spring, a clockwork spring, or an elastic energy storage element. During the rotation of the main input shaft 8 and the auxiliary input cylinder 9, the reset assembly 25 undergoes elastic deformation and accumulates elastic potential energy. When the tension of the cable 1 decreases or changes direction, the reset assembly 25 releases the accumulated potential energy, generating a reverse driving torque that drives the main input shaft 8 and the auxiliary input cylinder 9 to rotate in the opposite direction, thereby guiding the nut slider 2 to reset, preparing for energy consumption in the next vibration cycle. This allows the device to automatically return to its initial equilibrium position after completing its energy consumption task, avoiding the impact of mechanism jamming on subsequent vibration damping response.

[0032] In this embodiment, as Figure 1 As shown, the main input shaft 8 is also provided with a second energy-consuming section, which is connected to a cylindrical cam 19. The cylindrical cam 19 is equipped with a linkage rod 21 to convert the rotational motion into a telescopic motion. The end of the linkage rod 21 is connected to a disc 23 inserted into the second energy-consuming cylinder 22. The second energy-consuming cylinder 22 is provided with a non-Newtonian fluid 24 that impedes the movement of the disc 23. The second energy-consuming cylinder 22 is fixedly connected to the outer shell 7.

[0033] Specifically, such as Figure 1 As shown, to achieve the transmission between the cylindrical cam 19 and the linkage 21, a bidirectional closed helical groove 20 is formed on the surface of the cylindrical cam 19. Its trajectory is a sinusoidal curve distributed around the outer circumference of the cylindrical cam 19, and the two ends are connected to form a closed path. One end of the linkage 21 is slidably embedded in the helical groove 20. When the main input shaft 8 drives the cylindrical cam 19 to rotate, the sidewall of the helical groove 20 exerts a pushing force on the linkage 21. Utilizing the positional change of the sinusoidal curve along the generatrix plane of the cylindrical cam 19, the linkage 21 is forcibly pushed to perform linear reciprocating motion along the axial direction of the cylindrical cam 19. By utilizing the geometric characteristics of the cam profile, the continuous rotational motion of the main input shaft 8 is converted into high-frequency telescopic motion of the disk 23 within the second energy-consuming cylinder 22, increasing the energy consumption dimension of the system.

[0034] The non-Newtonian fluid 24 filled in the second energy-consuming cylinder 22 has unique rheological properties. Specifically, when the vibration amplitude of the cable 1 is small and the rotation speed of the main input shaft 8 is low, the linkage rod 21 drives the disk 23 to move slowly in the non-Newtonian fluid 24. The fluid experiences a low shear rate and exhibits a low viscosity state, making it easy for the fluid molecular chains to slip. At this time, the resistance force on the disk 23 is small, allowing the device to make small adaptive swings and avoiding the normal stress deformation of the cable 1 due to excessive damping.

[0035] Meanwhile, in order to accommodate the linkage rod 21 driving the disc 23 to penetrate deeper into the second energy dissipation cylinder 22 and encroach on the space inside the second energy dissipation cylinder 22, a spiral tube 26 is wrapped around the outside of the second energy dissipation cylinder 22, and a hole communicating with the spiral tube 26 is opened at the bottom of the second energy dissipation cylinder 22, so that the non-Newtonian fluid 24 inside the second energy dissipation cylinder 22 can enter into the spiral tube 26 or be discharged from the spiral tube 26. The spiral tube 26 is pre-filled with air.

[0036] As the linkage 21 drives the disk 23 downwards, the disk 23 compresses the non-Newtonian fluid 24 within the second energy-consuming cylinder 22, forcing it to flow into the spiral tube 26 through the bottom hole. The non-Newtonian fluid 24 then flows into the outer spiral tube 26 through the bottom hole, utilizing its narrow and meandering flow channel to extend its flow path. The non-Newtonian fluid 24 undergoes high-speed turbulence and reciprocating flow within the spiral tube 26, generating significant fluid inertia and viscous damping effects through the combined effects of its own inertia, the throttling resistance of the tube wall, and the compression and buffering effect of the pre-charged air. When the disk 23 moves upwards, the compressed air within the spiral tube 26 releases pressure as an energy storage medium, propelling the non-Newtonian fluid 24 back into the second energy-consuming cylinder 22.

[0037] Conversely, when cable 1 vibrates violently and the main input shaft 8 rotates at higher speeds, the disk 23 moves faster, and the shear rate of the non-Newtonian fluid 24 increases sharply. This causes the fluid's internal microstructure to reorganize, leading to a sudden increase in viscosity and exhibiting near-solid-state high-damping characteristics. At this time, the disk 23 needs to overcome enormous shear stress as it moves through the fluid. The fluid generates significant throttling resistance when passing through the through-holes on the disk 23, thus rapidly consuming a large amount of vibrational energy. This creates the required adaptive characteristics of low-speed, low-resistance and high-speed, high-resistance, enabling the device to automatically adjust its energy dissipation intensity according to the strength of the external excitation. This solves the contradiction of traditional dampers exhibiting excessive resistance at low frequencies and insufficient energy dissipation at high frequencies.

[0038] like Figure 1 As shown, through holes are also provided on the disk 23. The diameter, number, and distribution of the through holes on the disk 23 affect the amplitude of the throttling resistance, thus affecting the damping energy dissipation effect. The smaller the diameter of the through holes, the stronger the throttling effect, and the greater the pressure difference generated in the fluid thickening state. The more through holes, the larger the flow area provided in the low-speed state, which is beneficial to reducing the basic resistance in the low-speed condition. In actual design, the through hole parameters can be optimized according to the vibration frequency range of the target operating condition and the desired damping effect. For example, in the operating condition that needs to suppress high-frequency small-amplitude vibration, a smaller diameter and a larger number of through holes can be used to obtain stronger throttling resistance in the thickening state; while in the operating condition that needs to take into account the buffering of low-frequency large-amplitude vibration, the diameter can be appropriately increased and the number reduced to avoid excessive basic resistance in the low-speed condition. It can be understood that the annular gap between the disk 23 and the inner wall of the second energy dissipation cylinder 22 also participates in the throttling effect.

[0039] Furthermore, the reset assembly 25 between the main input shaft 8 and the housing 7 is connected to the second energy dissipation section, utilizing the space resources around the second energy dissipation section. Since the second energy dissipation cylinder 22 is typically large in size and fixed in position, anchoring one end of the reset assembly 25, which is composed of a torsion spring or tension spring, to the second energy dissipation section at the lower end of the main input shaft 8, and connecting the other end to the housing 7, can effectively shorten the lever arm path, making the overall structure more compact and reasonable. It also facilitates the reset assembly 25 to utilize the supporting reaction force of the second energy dissipation section during the energy storage process, thereby improving the stability of the reset.

[0040] like Figure 1 As shown, the bevel gear differential includes a wheel carrier and a bevel gear set. The wheel carrier is fixedly installed inside the housing 7, serving as a support and positioning element. The bevel gear set includes a first bevel gear 4 mating on the main input shaft 8, a third bevel gear 5 mating on the auxiliary input cylinder 9, and a second bevel gear 6 rotatably mounted on the wheel carrier.

[0041] The first bevel gear 4 and the third bevel gear 5 that cooperate with the main input shaft 8 and the auxiliary input cylinder 9 are connected by the second bevel gear 6. When the main input shaft 8 rotates, the first bevel gear 4 on it drives the second bevel gear 6 to rotate, which in turn drives the third bevel gear 5 on the auxiliary input cylinder 9, so that the rotation direction of the auxiliary input cylinder 9 is opposite to the rotation direction of the main input shaft 8, thus ensuring that the two can rotate synchronously in opposite directions in terms of mechanical structure.

[0042] like Figure 1 As shown, a closed energy dissipation cavity is formed inside the first energy dissipation cylinder 16. The main input shaft 8 coaxially passes through the first energy dissipation cylinder 16 and is provided with a rotation seal at the penetration position. This can effectively prevent the damping fluid 14 filled in the energy dissipation cavity from leaking, and at the same time prevent external impurities from entering the cavity and contaminating the damping fluid 14, thus ensuring the reliability of the device in long-term operation.

[0043] On the circumferential inner wall of the energy dissipation cavity, there are several flow disturbance blocks 17. The flow disturbance blocks 17 are uniformly or non-uniformly distributed along the inner wall, and their shape can be a convex prism, hemispherical, or asymmetrical streamlined structure. The flow disturbance blocks 17 can disrupt the laminar flow state of the damping fluid 14 during the rotational shearing process. When the first energy dissipation cylinder 16 rotates at high speed, the flow disturbance blocks 17 will generate strong disturbances to the damping fluid 14 flowing over its surface, forcing the fluid to generate irregular turbulence and vortices. By increasing the collision of micro-clusters and momentum exchange within the fluid through the turbulent state, the viscous drag torque during the fluid shearing process is increased. Compared with a smooth cylinder wall, the flow disturbance blocks 17 can convert more kinetic energy into heat energy, thereby increasing the energy dissipation density per unit volume.

[0044] Understandably, the specific shape and distribution density of the spoiler block 17 can be adjusted according to the actual working conditions. For example, in the case of high damping, the density of the spoiler block 17 can be increased or a sharp-edged shape can be adopted to enhance the disturbance effect. Alternatively, the protrusion height of the spoiler block 17 can be increased to enhance the disturbance effect, provided that the spoiler block 17 and the damping blade do not collide or interfere.

[0045] Combination Figure 1 and Figure 2 The damping blade 15 and the main input shaft 8 can also be synchronously moved on demand. The blade section is fitted with a one-way bearing 10. The outer ring of the one-way bearing 10 is connected to the damping blade 15 through a clutch. The clutch can work when the blade section reaches the set speed range under the set direction, so that the blade section drives the damping blade 15 to rotate synchronously.

[0046] Specifically, the clutch adopts a centrifugal clutch structure, including a transmission sleeve connected to the outer ring of the one-way bearing 10 and an outer sleeve sleeved outside the transmission sleeve. Several channels are radially formed on the transmission sleeve, and centrifugal blocks are installed within these channels via trigger springs 11. The centrifugal blocks can be steel balls 12, iron balls, etc. The damping blades 15 are fixedly connected to the outer sleeve, and the inner wall of the outer sleeve has meshing grooves 13 that match the centrifugal blocks.

[0047] When the main input shaft 8 rotates at a low speed, the centrifugal block retracts into the channel under the action of the trigger spring 11, and the transmission sleeve and the outer sleeve are separated. At this time, even if the main input shaft 8 rotates, the damping blade 15 remains stationary relative to the main input shaft 8, which effectively avoids unnecessary idling and agitation of the damping blade 15 when the cable 1 vibrates slightly or moves at low speed, thereby reducing the additional resistance of the device under non-energy-consuming conditions.

[0048] When the vibration of cable 1 intensifies and the rotational speed of the main input shaft 8 increases to the set speed range, the centrifugal force generated by the rotation of the transmission sleeve overcomes the tension of the trigger spring 11, throwing the centrifugal block radially out and engaging it in the meshing groove 13 on the inner wall of the outer sleeve. At this time, the clutch is engaged, and the torque of the main input shaft 8 is transmitted to the outer sleeve through the one-way bearing 10, the transmission sleeve, and the centrifugal block, driving the damping blade 15 to rotate synchronously at high speed. Since the first energy dissipation cylinder 16 rotates in the opposite direction under the drive of the auxiliary input cylinder 9, a high relative rotational speed is formed between the damping blade 15 and the first energy dissipation cylinder 16, thereby generating a large viscous resistance torque and achieving efficient energy dissipation. It should be understood that the specific value of the set speed range can be adjusted by adjusting the stiffness coefficient of the trigger spring 11 or the mass of the centrifugal block to adapt to the vibration reduction requirements of different specifications of cable 1. The set speed range can be set to greater than 60 revolutions per minute.

[0049] Furthermore, the one-way bearing 10 reduces resistance during the device's reset process. When the tension of the cable 1 decreases and the reset assembly 25 drives the main input shaft 8 to rotate in the opposite direction for reset rotation, the reset rotation speed is low, and the one-way bearing 10 is in an overrunning state, meaning its inner ring rotates in the opposite direction with the main input shaft 8, while the outer ring does not rotate with the inner ring. Therefore, during the reset process, the clutch and damping blade 15 remain stationary, no longer shearing the damping fluid 14, reducing fluid resistance during reset. This allows the reset assembly 25 to release elastic potential energy more smoothly, driving the mechanism to return to its original position quickly, solving the problem of difficult reset in traditional damping devices. Additionally, as... Figure 1 As shown, permanent magnets 18 are installed on both ends of the internal cavity of the first energy dissipation cylinder 16, and the opposite magnetic poles of the permanent magnets 18 on both ends are distributed opposite to each other, forming a magnetic coupling pair. In this embodiment, the damping blade 15 is a closed annular conductor and is located in the dense area of ​​magnetic field lines formed by the magnetic coupling pair. Correspondingly, the energy dissipation cavity of the first energy dissipation cylinder 16 is made of soft magnetic material to concentrate the magnetic field and reduce magnetic leakage. During the process of the damping blade 15 rotating and cutting the magnetic field lines, an induced current is formed inside the closed conductor and induced heat is generated accordingly. The eddy current damping effect is used to impede the rotation of the main input shaft 8 and the auxiliary input cylinder 9, thereby achieving the purpose of energy dissipation and vibration attenuation.

[0050] like Figure 3 As shown, the outer casing 7 is a hollow cylindrical structure with heat dissipation holes on its outer circumferential wall and a connecting part at one end for use with an external fixing structure. The outer casing 7 serves as the load-bearing base of the entire device, and its hollow cylindrical structure provides a sealed and stable installation space for the internal bevel gear differential, main input shaft 8, and other components.

[0051] The heat dissipation holes are located on the upper part of the circumferential wall of the outer casing 7 or in the area corresponding to the first energy-consuming cylinder 16 and the second energy-consuming cylinder 22. The shape of the heat dissipation holes can be circular, oblong, or louvered, serving as heat exchange channels between the device's interior and the external environment. During device operation, both the heat generated by the shearing of the damping fluid 14 in the first energy-consuming cylinder 16 and the heat generated by the shearing thickening of the non-Newtonian fluid 24 in the second energy-consuming cylinder 22 will cause the internal temperature of the device to rise. The heat dissipation holes utilize natural convection or airflow caused by wind load to promptly expel the accumulated hot air inside and introduce external cold air, thereby maintaining the internal temperature of the device within a reasonable range. This prevents the damping fluid 14 from reducing viscosity, the seals from failing, or the properties of the non-Newtonian fluid 24 from changing due to excessive temperature rise, ensuring the long-term stability of the device's operation.

[0052] One end of the outer casing 7 is equipped with a connecting part for use with an external fixing structure. If the outer casing 7 is installed in a foundation soil or rock area, the connecting part can be a helical anchor rod with continuous helical blades on its surface. During installation, the outer casing 7 is rotated or the helical anchor rod is directly driven to screw it into the soil or concrete foundation near the bridge tower. The connecting part can also take various forms such as lifting lugs, hooks, and perforated ear plates, depending on the fixing facilities at the construction site. The connecting part is detachably connected to the main body of the outer casing 7, and a suitable connecting part can be replaced as needed to adapt to complex and changing construction environments. It can quickly fix the device in a designated position and provide reliable pull-out and torsional resistance when subjected to alternating tension transmitted by the cable 1, ensuring that the device does not loosen or shift under long-term vibration conditions.

[0053] This embodiment achieves graded energy consumption based on speed adaptation. Under the initial weak vibration condition of wind load, the clutch is in the disengaged state. The device provides appropriate composite basic damping through the shear resistance of the damping fluid 14 in the first energy consumption cylinder 16, the initial throttling resistance of the unthickened non-Newtonian fluid 24 in the second energy consumption cylinder 22, and the small inertial capacity effect. This effectively reduces micro-vibration and avoids limiting the normal deformation and recovery of the cable due to excessive damping. As the wind load intensifies and the speed reaches the set range, the clutch engages under the action of centrifugal force. Through the coaxial counter-rotating shearing of the first energy consumption cylinder 16 and the damping blade 15, the effective shear rate of the damping fluid 14 is multiplied. This is combined with the eddy current damping between the damping blade 15 and the permanent magnet 18, as well as the shear thickening and liquid inertial capacity of the non-Newtonian fluid 24 in the second energy consumption cylinder 22, to achieve three-level coordinated energy consumption and rapidly dissipate energy.

[0054] It is understood that the cable energy dissipation and vibration reduction device provided in this embodiment can also be applied to scenarios such as overhead power transmission conductors, prestressed cables, and steel cables for hoisting large components.

[0055] Example 2 In another embodiment of the present invention, such as Figure 1 - Figure 3 As shown, a cable energy dissipation and vibration reduction system is provided, which utilizes the cable energy dissipation and vibration reduction device as in Example 1.

[0056] In practical long-span bridge engineering, bridge towers often exhibit complex dynamic characteristics. While vibration damping devices at a single location can effectively suppress local vibrations at that specific point, their overall spatial synergistic vibration damping effect on the entire structure is limited. This embodiment constructs a distributed vibration damping system by installing multiple cable energy-dissipating vibration damping devices at different heights and orientations of the bridge towers.

[0057] For example, cable-stayed energy dissipation and vibration damping devices can be installed at the top, middle, and near the anchorage zone at the bottom of the bridge tower. Each device is connected to the main structure of the bridge tower via cable 1. When the bridge tower experiences spatial vibration due to wind load, the vibration damping devices at different locations can respond to the vibration displacement of the corresponding parts of the bridge tower. Since each device is equipped with a screw-slider mechanism and an adaptive energy dissipation system, it can independently and synchronously convert the vibration energy at its location into heat energy for dissipation.

[0058] The vibration damping devices do not require complex electrical connections or communication controls; instead, they achieve physical coordination through the dynamic response of the bridge tower structure itself. When the bridge tower vibrates under complex and variable wind loads, the devices at different locations adjust their energy dissipation intensity according to the different vibration amplitudes in their corresponding areas. This distributed layout effectively avoids the localized stress concentration problems that may occur with a single damper, while also expanding the damping frequency band, enabling the system to more comprehensively suppress the vibration components of the bridge tower in all directions and at all frequencies. Furthermore, because each device operates independently, the maintenance or failure of a single device will not cause the entire vibration damping system to fail, thus improving the system's reliability and redundancy.

[0059] Example 3 In another typical embodiment of the present invention, such as Figure 1 - Figure 3 As shown, a working method of a cable energy dissipation and vibration reduction device is given, which utilizes the cable energy dissipation and vibration reduction device as in Example 1, including: When the cable 1 is excited and generates axial vibration, it drives the nut slider 2 to reciprocate along the axial direction of the outer shell 7. The linear displacement of the cable 1 is converted into the rotational motion of the main input shaft 8 through the screw slider mechanism. The rotational motion of the main input shaft 8 drives the bevel gear differential through the transmission section, driving the auxiliary input cylinder 9 to rotate synchronously in the opposite direction to the main input shaft 8; the damping blade 15 of the blade section and the first energy dissipation cylinder 16 driven by the auxiliary input cylinder 9 form a coaxial and opposite rotation. Inside the first energy dissipation cylinder 16, the counter-rotating cylinder wall and the damping blade 15 together exert a shearing effect on the damping fluid 14 filled in the middle. By increasing the relative rotational speed between the damping blade 15 and the damping fluid 14, the viscous resistance torque per unit time is increased, and the vibration energy of the cable 1 is converted into the heat energy of the damping fluid 14. While the main input shaft 8 and the auxiliary input cylinder 9 rotate, the reset component 25 deforms and accumulates elastic potential energy. When the tension of the cable 1 decreases or changes direction, the reset component 25 releases potential energy, drives the main input shaft 8 and the auxiliary input cylinder 9 to rotate in the opposite direction, guides the nut slider 2 to reset, and prepares for energy consumption in the next vibration cycle.

[0060] In this embodiment, the wind-resistant vibration reduction scenario of a cross-sea bridge tower is used as an example to illustrate the practical application of the above-mentioned cable energy dissipation and vibration reduction device. The cross-sea bridge is located in an environment with high wind speed, high humidity, and turbulent wind field, which makes the bridge tower cable 1 prone to large vibrations.

[0061] Specifically, multiple cable-stayed vibration damping devices are connected to different heights of the bridge tower, forming a distributed vibration damping network. The outer shell 7 of each device is deeply anchored to the bridge tower foundation or surrounding soil and rock through a connection with the external fixing structure. One end of the cable 1 is connected to the bridge tower, and the other end is connected to the nut slider 2 inside the device. When the bridge tower vibrates due to strong winds, the vibration energy is transmitted to each vibration damping device through the cable 1.

[0062] In the initial stage of wind load, cable 1 experiences small-amplitude vibrations or low-frequency oscillations. At this time, cable 1 drives nut slider 2 to reciprocate axially, driving the main input shaft 8 to rotate at a low speed. Since the rotational speed has not reached the set speed range, the clutch outside the blade section is disengaged, and the damping blade 15 remains stationary. At this time, the first energy dissipation cylinder 16 is mainly driven to rotate by the auxiliary input cylinder 9. The damping fluid 14 inside the first energy dissipation cylinder 16 is sheared by the cylinder wall and the turbulence block 17, generating basic damping force and consuming some vibration energy. At the same time, the damping blade 15 rotates with the disturbance of the damping fluid 14. Since the damping blade 15 and the permanent magnet 18 rotate in the same direction and the speed difference is small, the effect of eddy current damping is very small at this time. At this time, the main input shaft 8 rotates at low speed, driving the cylindrical cam 19 to rotate. This drives the linkage rod 21 to cause the disk 23 to reciprocate at low speed within the second energy-consuming cylinder 22. This causes a small throttling resistance to be generated in the non-Newtonian fluid 24, which has not undergone shear thickening. Simultaneously, some of the non-Newtonian fluid 24 is squeezed into the spiral tube 26 for liquid inertial volume, thus providing some damping force. During this stage, the device provides moderate damping, which both consumes energy and avoids limiting the normal deformation and recovery of the cable 1 due to excessive damping.

[0063] As wind load intensifies, the amplitude of cable 1 increases, the moving speed of nut slider 2 accelerates, and the rotational speed of main input shaft 8 rapidly increases. When the rotational speed reaches the set range, the clutch automatically engages under centrifugal force, driving the damping blade 15 to rotate at high speed. At this time, the bevel gear differential drives the auxiliary input cylinder 9 and the first energy dissipation cylinder 16 to rotate in the opposite direction to the main input shaft 8. The damping blade 15 and the first energy dissipation cylinder 16 form a coaxial counter-rotation, which violently shears the damping fluid 14, increasing the viscous resistance torque and rapidly consuming a large amount of vibration energy. Furthermore, due to the opposite relative motion between the permanent magnet 18 and the damping blade 15, the damping blade 15 cuts the magnetic field lines to form induced eddy currents inside, generating Joule heat which is converted into heat energy dissipation, thereby achieving eddy current damping energy dissipation, and significantly enhancing the energy dissipation effect. Simultaneously, the main input shaft 8 drives the cylindrical cam 19 of the second energy dissipation section to rotate, driving the linkage rod 21 and the disk 23 to reciprocate at high speed within the second energy dissipation cylinder 22. The non-Newtonian fluid 24 in the second energy-consuming cylinder 22 experiences a sharp increase in viscosity due to the shear thickening effect, generating throttling resistance and working in conjunction with the first energy-consuming cylinder 16 to perform multi-stage energy consumption.

[0064] When the wind load weakens or stops, the tension in cable 1 decreases. The reset assembly 25 releases its stored elastic potential energy, driving the main input shaft 8 and auxiliary input cylinder 9 to rotate in opposite directions, guiding the nut slider 2 to reset. During the reset process, the one-way bearing 10 is in an overrunning state, the damping blade 15 remains stationary, and shear resistance is no longer generated; simultaneously, the first energy dissipation cylinder 16 rotates in the opposite direction, and the turbulence block 17 on its inner wall guides the flow of damping fluid 14 using a specific guiding arc surface, significantly reducing fluid resistance. This allows the device to return to its initial equilibrium position, preparing for the next vibration cycle.

[0065] 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 cable energy dissipation and vibration reduction device, characterized in that, include: Cable, connected with a nut slider; The main input shaft is rotatably mounted inside the housing. Along the axial direction, it is provided with a threaded section, a transmission section, and a blade section. The threaded section, together with the nut and slider, forms a screw-slider mechanism, which can convert the tensioning action of the cable into the rotational action of the main input shaft. The blade section is fitted with damping blades. The auxiliary input cylinder is sleeved outside the transmission section of the main input shaft and cooperates with the main input shaft through a bevel gear differential to rotate synchronously in opposite directions. The auxiliary input cylinder is connected to the first energy dissipation cylinder sleeved outside the blade section. The first energy dissipation cylinder is filled with damping fluid for the damping blades to be immersed in. The reset assembly is connected between the housing and the main input shaft, and between the housing and the auxiliary input cylinder; The blade section is fitted with a one-way bearing. The outer ring of the one-way bearing is connected to the damping blade via a clutch. The clutch can work when the blade section reaches a set speed range under a set direction, so that the blade section drives the damping blade to rotate synchronously. The clutch adopts a centrifugal clutch structure, including a transmission sleeve connected to the outer ring of a one-way bearing and an outer sleeve sleeved outside the transmission sleeve. Several channels are opened radially on the transmission sleeve, and centrifugal blocks are installed in the channels through trigger springs. The damping blades are fixedly connected to the outer sleeve, and the inner wall of the outer sleeve is provided with meshing grooves that match the centrifugal blocks.

2. The cable energy dissipation and vibration reduction device as described in claim 1, characterized in that, The main input shaft is also provided with a second energy-consuming section, which is connected to a cylindrical cam. The cylindrical cam is equipped with a linkage rod to convert the rotational motion into a telescopic motion. The end of the linkage rod is connected to a disc inserted into the second energy-consuming cylinder. The second energy-consuming cylinder contains a non-Newtonian fluid that impedes the movement of the disc. The bottom of the second energy-consuming cylinder is connected to the first end of the bottom of the spiral tube. The spiral tube is wrapped around the second energy-consuming cylinder. The second end of the top of the spiral tube is sealed and pre-filled with air.

3. The cable energy dissipation and vibration reduction device as described in claim 2, characterized in that, The reset assembly between the main input shaft and the housing is connected to the second energy-consuming section.

4. The cable energy dissipation and vibration reduction device as described in claim 1, characterized in that, The bevel gear differential includes a wheel frame and a bevel gear set. The wheel frame is installed inside the housing. The main input shaft and the auxiliary input cylinder are respectively equipped with bevel gears. The bevel gears that are equipped with each other are driven by the bevel gears mounted on the wheel frame to rotate synchronously in opposite directions.

5. The cable energy dissipation and vibration reduction device as described in claim 4, characterized in that, The first energy-consuming cylinder has an energy-consuming cavity inside. The main input shaft coaxially passes through the first energy-consuming cylinder and is provided with a rotation seal at the penetration position. A turbulence block is provided on the circumferential inner wall of the energy-consuming cavity.

6. The cable energy dissipation and vibration reduction device as described in claim 5, characterized in that, The internal cavity of the first energy-consuming cylinder is equipped with permanent magnets on both ends along the axial direction. The opposite magnetic poles of the permanent magnets on both ends are distributed to form magnetic coupling pairs. The damping blade is a closed ring conductor. When rotating, it cuts the magnetic field lines formed by the magnetic coupling pairs to generate eddy current damping.

7. The cable energy dissipation and vibration reduction device as described in claim 1, characterized in that, The outer shell is a hollow cylindrical structure with heat dissipation holes on the outer circumferential wall and a connecting part at one end to cooperate with the external fixing structure.

8. A cable energy dissipation and vibration reduction system, characterized in that, Using a cable energy dissipation and vibration reduction device as described in any one of claims 1-7, multiple cable energy dissipation and vibration reduction devices are respectively connected to the bridge tower.

9. A method for operating a cable energy dissipation and vibration damping device, comprising using the cable energy dissipation and vibration damping device as described in any one of claims 1-7, characterized in that, include: When the cable is excited and produces axial vibration, it drives the nut slider to move back and forth along the axial direction of the outer shell. The linear displacement of the cable is converted into the rotational motion of the main input shaft through the screw slider mechanism. The rotational motion of the main input shaft drives the bevel gear differential through the transmission section, driving the auxiliary input cylinder to rotate synchronously in the opposite direction to the main input shaft; the damping blades of the blade section and the first energy dissipation cylinder driven by the auxiliary input cylinder rotate in opposite directions on the same axis. Inside the first energy dissipation cylinder, the counter-rotating cylinder wall and the damping blades together exert a shearing effect on the damping fluid filled in the middle. By increasing the relative rotational speed between the damping blades and the damping fluid, the viscous resistance torque per unit time is increased, and the vibration energy of the cable is converted into the heat energy of the damping fluid. While the main input shaft and the auxiliary input cylinder rotate, the reset component deforms and accumulates elastic potential energy. When the tension of the cable decreases or changes direction, the reset component releases potential energy, driving the main input shaft and the auxiliary input cylinder to rotate in the opposite direction, guiding the nut slider to reset, and preparing for energy consumption in the next vibration cycle.

10. The operating method of the cable energy dissipation and vibration reduction device as described in claim 9, characterized in that, The outer shell is inserted into the anchor position and fixed. Multiple cable energy dissipation and vibration reduction devices are connected to the bridge tower through cables to jointly suppress the vibration of the bridge tower.

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