A kind of inertial mass particle type power transmission tower damping device with multidirectional control effect

Abstract

The application belongs to the technical field of power transmission tower structure damping, and discloses a mass-inertia particle type power transmission tower damping device with multi-directional control effect. The mass-inertia container is introduced into the particle damper to reduce the total mass of the damping device and realize lightweight of the device. Considering that the seismic response of the power transmission tower is multi-directional motion, the arrangement mode of the particles and the mass-inertia is optimized to further improve the damping effect of the device. The mass-inertia container in the application can generate inertia force opposite to the vibration direction of the structure, which reduces the number of particles while ensuring the dynamic damping effect of the particle damper. The mass-inertia container composed of a gear and a rack has small self-weight, compact structure and simple installation, the power transmission mechanism has low energy loss, the gear and the rack can realize rapid rotation of the flywheel through rigid meshing transmission, the power transmission tower seismic response sensing has high sensitivity, and a large rotary inertia force can be generated in limited space.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction technology for transmission tower structures, and in particular to an inertial capacitive particle-type transmission tower vibration reduction device with multi-directional control function. Background Technology

[0002] Electricity is a core pillar of modern society, and the safe and stable operation of power transmission lines is of great significance to people's normal production and life. my country is located at the intersection of the Circum-Pacific Seismic Belt and the Eurasian Seismic Belt, experiencing frequent earthquakes. Transmission towers, as key engineering structures for power transmission, are highly flexible and often suffer structural damage or even collapse under earthquakes. This can trigger multiple transmission line trips, causing power outages, damage to power plant equipment, and shutdowns, among other serious consequences, hindering post-earthquake emergency rescue channels and ensuring power supply.

[0003] Installing various types of vibration damping devices to dissipate vibration energy or actively cancel vibration excitation is an effective way to reduce the seismic response of transmission towers and improve the seismic resilience of power grids. Passive control is the most widely used type due to its low cost and high reliability. Among them, the traditional tuned mass damper (TMD) can cancel structural vibration through the inertial force of the added mass block, but it is only effective for vibrations of specific frequencies. In contrast, particle dampers, through their multi-mechanism energy dissipation, wide-frequency vibration reduction, and strong robustness, compensate for the limitations of TMDs in complex vibration scenarios. However, the self-weight and space occupied by particle dampers increase with the number of particles, which increases the installation difficulty for transmission tower structures. Therefore, it is necessary to optimize particle dampers and develop lighter and more efficient particle vibration damping devices.

[0004] Chinese patent CN113236699A, "A Multi-Stage Adjustable Particle Damping Inertial Capacitive Vibration Damper," provides a device for energy dissipation and vibration reduction in civil engineering structures. Since inertial capacitive vibration dampers cannot meet the demands of different vibration intensities or varying damping forces in different projects, this patent introduces particles into the damper. The mass ratio, filling rate, and particle size of the buffer material and metal particles are selected according to actual needs to ensure the optimal energy dissipation capacity matches the usage requirements. Furthermore, as structural vibration increases, the number of rotating rollers in this patent increases, enhancing the damping effect and achieving multi-stage adjustable damping performance. However, the damper uses a large number of metal particles, which can easily lead to particle stacking within the rollers, reducing the energy dissipation efficiency of collisions between particles and between particles and rollers. Additionally, since the vibration of transmission towers caused by earthquakes is multi-directional, this patent can only reduce the vibration response in one direction, failing to meet the needs of multi-directional vibration control in actual structures. Therefore, it is necessary to optimize the particle damper and develop a lighter and more efficient inertial capacitive particle damping device. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an inertial capacitance granular transmission tower vibration damping device with multi-directional control. Taking advantage of the inertial container's ability to amplify the inertia of a constant-mass object several times, it is incorporated into the granular damper to reduce the overall mass of the damping device, achieving a lightweight design. Furthermore, considering the multi-directional seismic response of transmission towers, the arrangement of the granules and inertial capacitance is optimized to further improve the device's vibration damping effect.

[0006] The technical solution of the present invention is as follows: an inertial capacitive particle-type transmission tower vibration damping device with multi-directional control function, comprising an inertial container, particles, and steel pipes; the inertial container is installed inside a packaging box and fixed to the bottom plate 20 of the packaging box by a support frame 8; the steel pipes are arranged in multiple groups, each group of steel pipes being located at the vertex of a rectangle and the intersection of the diagonals of the rectangle; the particles move freely inside the steel pipes; the inertial container is arranged between any two adjacent groups of steel pipes.

[0007] The outer shell 6 is welded to the base plate 20 as a whole, and a steel plate is installed on the upper end of the outer shell 6 as a cover plate to form a sealed shock-absorbing device encapsulation box.

[0008] The rectangle is a square.

[0009] The inertial container is divided into a peripheral inertial container and an internal inertial container according to its distribution position. The peripheral inertial container is located between the steel pipes at the two vertices, and springs 2 are fixedly connected to the outer sides of the wing plates 8-1 at both ends of the support frame 8. The internal inertial container is located between the steel pipe at the vertex and the steel pipe at the intersection of the diagonal. A fixed spring 2 is provided on the outer side of the wing plate 8-1 of the support frame 8 facing the steel pipe at the vertex, and a gap is left between the wing plate 8-1 of the support frame 8 facing the steel pipe at the intersection and the steel pipe at the intersection.

[0010] The central crossbeam 8-2 of the support frame 8 is provided with a flywheel hole 8-3 with a bearing 19, a pinion a hole 8-4 and a large gear hole 8-5. The connecting rod 9 passes through the bearing 19. A large gear 5, two pinions and a flywheel are installed on both sides of the central crossbeam 8-2 of the support frame 8 via the connecting rod 9. The wing plates 8-1 at both ends of the support frame 8 are provided with rack holes 8-6. The rack 14 passes through the holes 8-6, through the center of the spring 2, and is fixedly connected to the outer wall of the steel pipe.

[0011] The large gear 5 rotates coaxially with the small gear b13 and meshes with another small gear a1; the small gear b13 meshes with the rack 14;

[0012] The pinion a1 rotates coaxially with the flywheel.

[0013] The flywheel is divided into a perimeter flywheel 12 and an inner flywheel 11 according to the distribution of the inertia container, and the two have equal moments of inertia.

[0014] The steel pipes are divided into peripheral steel pipes 4 and internal steel pipes 3 according to their distribution. The peripheral steel pipes 4 are located at the apex and are divided into two parts along the diameter perpendicular to the diagonal of the rectangle. The outer part 4-1 is the same height as the outer shell 6 and is fixed to the base plate 20. The inner part is taken from the left and right sides of the diagonal so that the arc of the whole steel plate is greater than the diameter of the spring 2, thereby obtaining steel pipe component 4-2 and steel pipe components a4-3 and b4-4 of the same size. The height of the inner part of the steel pipe is less than that of the outer shell 6 and is only fixedly connected to the rack 14, moving with the movement of the rack 14. The internal steel pipes 3 are located at the intersection of the diagonals and are divided into four parts. The height of each part is the same as that of the inner part of the steel pipe and is also fixedly connected to the rack 14, moving with its movement.

[0015] The spring 2 is connected to the support frame wing plate 8-1 and the steel pipe at both ends, respectively.

[0016] The inner wall of the steel pipe is lined with a viscoelastic material.

[0017] The support frame 8 is an H-shaped support frame.

[0018] The beneficial effects of this invention are as follows: By utilizing the mechanical transmission between gears in the inertial container, the inertial force generated by the rotation of the flywheel is added to the particle damper. Through reasonable optimization design, the device possesses multi-directional vibration reduction and control performance. In this invention, the inertial container can generate an inertial force opposite to the direction of structural vibration, ensuring the dynamic vibration reduction effect of the particle damper while reducing the number of particles. Furthermore, this inertial container, composed of gears and racks, has a small self-weight, compact structure, and simple installation. The power transmission mechanism has low energy loss, and the rapid rotation of the flywheel can be achieved through rigid meshing of the gears and racks. It has high sensitivity to the seismic response of transmission towers and can generate a large rotational inertial force in a limited space. Through reasonable inertial container layout design, the volume of the vibration damping device can be reduced, providing multi-directional vibration control performance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the inertial capacitance particle-type transmission tower vibration damping device of the present invention;

[0020] Figure 2 This is a top view of the structure of the present invention;

[0021] Figure 3 This is a schematic diagram showing partial structural details of the present invention;

[0022] Figure 4 for Figure 3 3D cross-section of aa;

[0023] Figure 5 for Figure 3 BB cross-section 3D diagram;

[0024] Figure 6 A schematic diagram illustrating the process by which surrounding particles c excite the central inertial container;

[0025] Figure 7 Detailed view of support frame 8.

[0026] In the diagram: 1-Pinus a; 2-Spring; 3-Inner steel tube; 4-Surrounding steel tube; 4-1-Outer part; 4-2-Steel tube component; 4-3-Steel tube component a; 4-4-Steel tube component b; 5-Large gear; 6-Outer shell; 7-Surrounding particle a; 8-Support frame; 8-1-Support frame wing plate; 8-2-Support frame center crossbeam; 8-3-Flywheel hole; 8-4-Pinus a hole; 8-5-Large gear hole; 8-6-Rack hole; 9-Connecting rod; 10-Center particle; 11-Inner flywheel; 12-Surrounding flywheel; 13-Pinus b; 14-Rack; 15-Surrounding particle c; 16-Surrounding particle d; 17-Bolt hole; 18-Surrounding particle b; 19-Bearing; 20-Base plate. Detailed Implementation

[0027] To better explain and facilitate understanding of the present invention, the technical solution and effects of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] A multi-directional control inertial capacitive particle-type transmission tower vibration damping device includes an inertial container, particles, and a steel pipe. The inertial container is installed inside a packaging box and is fixed to the bottom plate of the packaging box by an H-shaped support frame formed by welding steel plates.

[0029] The central crossbeam of the support frame has holes with bearings, which allow a large gear, two small gears, and a flywheel to be mounted on the crossbeam via connecting rods. Holes are provided on the wing plates at both ends of the support frame, allowing racks to pass through them.

[0030] The large gear rotates coaxially with the small gear (driving gear) that meshes with the rack, and also meshes with another small gear (driven gear).

[0031] The other small gear (driven gear) rotates coaxially with the flywheel.

[0032] The rack passes through the two end flanges, passes through the center of the spring on the outside of the flanges, and is fixedly connected to the outer wall of the steel pipe.

[0033] The spring is connected to a support frame wing plate and a steel pipe at both ends.

[0034] The inner wall of the steel pipe is lined with a viscoelastic material to improve the energy dissipation of the damper.

[0035] The particles are steel balls that can move freely within the internal space of the steel pipe.

[0036] The aforementioned packaging box is used to encapsulate the inertial container and the particles as a whole.

[0037] like Figures 1 to 7 As shown in the figure, this embodiment provides an inertial capacitive particle-type transmission tower vibration damping device with multi-directional control function, including an inertial container, a steel pipe and particles.

[0038] The inertial container mainly consists of an H-shaped support frame 8, a rack 14, pinions a1 and b13, a large gear 5, a flywheel, and other components. The support frame 8 is fixed to the base plate 20. Details of the support frame are as follows: Figure 7 As shown. The inertia containers can be divided into peripheral inertia containers and internal inertia containers according to their distribution location. The only difference between the two types of inertia containers is the number of springs and the mass of the flywheel. In the peripheral inertia container, springs 2 are fixedly connected to the outer sides of the wing plates 8-1 at both ends of the support frame 8; while in the internal inertia container, springs 2 are only provided on the outer side of one wing plate 8-1 of the support frame 8. The flywheels can be divided into peripheral flywheels 12 and internal flywheels 11 according to their distribution location within the corresponding inertia containers. Both have equal moments of inertia to provide the device with multi-directional vibration damping control.

[0039] The particles are divided into central particles (10) and surrounding particles; the surrounding particles are further divided into surrounding particles a7, surrounding particles b18, surrounding particles c15, and surrounding particles d16.

[0040] The rack 14 passes through the central rack hole 8-6 in the spring 2 and the support frame 8 wing plate, and is fixedly connected to the centroid of the steel pipe component. The steel pipe component is divided into peripheral steel pipes 4 and inner steel pipes 3 according to their distribution. The peripheral steel pipes 4 are divided into two parts along the diameter perpendicular to the diagonal of their rectangle. The outer part 4-1 is the same height as the outer casing 6 and is fixed to the base plate 20; the inner part is a portion taken equally on both sides of the diagonal of its rectangle, such as... Figure 3 As shown, the curvature of the entire steel plate is made slightly larger than the diameter of the spring 2, thus obtaining steel pipe component 4-2 and two steel pipe components 4-3 and 4-4 of the same size. The height of these three steel pipe components is smaller than that of the outer shell 6, and they are only fixedly connected to the rack 14, moving with the movement of the rack 14. The internal steel pipe 3 is divided into four parts, each part having the same height as steel pipe components 4-2, 4-3 and 4-4, and is also fixedly connected to the rack 14, moving in translation with its movement.

[0041] The middle section of the support frame 8 is the core device of the inertial container. The rack 14 in this section meshes with the pinion b13. The translational motion of the rack 14 drives the pinion b13 to rotate. The pinion b13 is connected to the large gear 5 via a connecting rod 9, and the two rotate coaxially via a bearing 19. When the large gear 5 rotates, it drives the pinion a1, and the rotation of the pinion a1 drives the flywheel to rotate rapidly, generating inertial force.

[0042] The working principle of this invention is as follows:

[0043] Transmission towers are highly flexible structures, and their top dynamic response is significant under seismic loads. Therefore, a vibration damping device will be installed at the top of the tower. High-strength bolts will be used to connect the device to the tower top members through bolt holes 17, making the device an integral part of the tower structure. When the transmission tower is subjected to seismic forces, the particles first undergo free rolling. Since one of the advantages of this invention is multi-directional vibration control, and the device has a symmetrical structure, the particle motion is simplified into three cases: horizontal motion along the X-axis, vertical motion along the Y-axis, and oblique motion along the a-axis. The vibration damping principle of the device is then described (X-axis, Y-axis, and a-axis motion are as follows). Figure 2 (As shown).

[0044] (a) The particle moves along the X direction

[0045] The force acts on the particles, causing the steel ball particles to move freely in the direction of the force. The inertial motion of the particles and the collisions and friction between the particles will dissipate the energy generated by the earthquake on the structure. In addition, the inertial motion of the steel ball particles can cause the particles to collide with the steel pipe components. This is divided into two parts: (1) In the four-sided inertial container, the four-sided particles c15 and d16 collide with the steel pipe component 4-4 at the left end, exciting the two four-sided inertial containers parallel to the X-axis, causing the spring 2 at the left end to be compressed, and the rack 14 to translate along the direction of the force, pushing the steel pipe component 4-4 at the right end, and then driving the spring 2 at the right end to stretch. In this process, the rack 14 will drive the pinion b13 to rotate, causing the large gear 5 coaxial with it to rotate, and driving the pinion a1 to rotate, ultimately causing the flywheel 12 to accelerate. The inertial force generated during the acceleration will hinder the acceleration and play a role in dissipating vibration energy. In addition, the surrounding particles a7 and b18 will bounce when they collide with the steel pipe component 4-1. Due to the extension of the right end spring 2, the space of the right end particles becomes smaller, and the surrounding particles a7 and b18 will repeatedly bounce and collide, further dissipating the seismic energy. (2) In the central inertial container, the collision motion between the central particle 10 and the internal steel pipe 3 will also further reduce the impact of the seismic action on the structure.

[0046] (ii) Particles move along the Y direction

[0047] Because seismic forces are multidirectional and time-varying, they will exert a force along the Y-axis on the transmission tower at a certain moment over time, causing all components in the damping device to move in the Y-axis. The working principle of the device is similar to that when moving along the X-axis, the difference being that it excites two other components in the surrounding inertial containers and the central inertial container to dissipate seismic energy.

[0048] (iii) Particles move along axis a

[0049] When a real earthquake acts on a structure, the probability of the structure vibrating entirely along the X or Y direction is low; most vibrations are caused by the coupling of X and Y forces. To describe the working principle of the damping device in this case, we assume that the device reciprocates along the a direction. The surrounding particles c15 roll under the seismic force, exciting a central inertial container arranged diagonally. The spring 2 in the central inertial container is compressed, causing the rack 14 to extend at the other end of the support frame 8, pushing the central steel pipe component 3 inward. This reduces the free rolling area of ​​the central particle 10, causing the central particle 10 to repeatedly bounce and collide within a small space, dissipating energy. This process is as follows: Figure 6 As shown, the motion of the central particle 10 does not excite the central inertial container. When the device moves in the opposite direction along direction a, the surrounding particles a7 dissipate energy in the same way.

[0050] In addition, when the particles do not move completely along the X, Y, and a directions and produce a slight offset, an additional four-sided inertial container will be excited to achieve multi-inertial container cooperative vibration reduction.

[0051] In summary, this invention utilizes the principle of inertial capacitance, adding a rack and pinion inertial container to a particle damper to form a novel inertial capacitance particle-type transmission tower vibration damping device. This allows for coordinated operation of the particles and the inertial container, achieving efficient dissipation of vibration energy through the combined effects of damping and inertia. Thus, while ensuring the device's vibration damping effect, it reduces the weight and size of the particle damper, achieving the goal of lightweight particle dampers. Furthermore, through a rational structural design, the device achieves multi-directional vibration control effects while remaining lightweight.

Claims

1. A vibration damping device for inertial capacitive particle-type transmission towers with multi-directional control function, characterized in that, The system includes an inertial container, particles, and steel pipes. The inertial container is installed inside the packaging box and fixed to the bottom plate (20) of the packaging box by a support frame (8). The steel pipes are arranged in multiple groups, with each group of steel pipes located at the vertex of a square and the intersection of the diagonals of the square. The particles move freely inside the steel pipes. An inertial container is arranged between any two adjacent groups of steel pipes. The inertial containers are divided into peripheral inertial containers and internal inertial containers according to their distribution position. The peripheral inertial containers are located between the steel pipes at the two vertices, and springs (2) are fixedly connected to them on the outer side of the wing plates (8-1) at both ends of the support frame (8). The internal inertial container is located between the steel pipe at the vertex and the steel pipe at the intersection of the diagonals. A fixed spring (2) is provided on the outer side of the wing plate (8-1) of the support frame (8) facing the steel pipe at the vertex, and a gap is left between the outer side of the wing plate (8-1) of the support frame (8) facing the steel pipe at the intersection and the steel pipe at the intersection.

2. The inertial capacitive particle-type transmission tower vibration damping device with multi-directional control function according to claim 1, characterized in that, The outer shell (6) is welded to the base plate (20) as a whole, and a steel plate is installed on the upper end of the outer shell (6) as a cover plate to form a sealed shock-absorbing device encapsulation box.

3. The inertial capacitance particle-type transmission tower vibration damping device with multi-directional control function according to claim 1, characterized in that, The support frame (8) has a flywheel hole (8-3) with a bearing (19), a small gear hole (8-4) and a large gear hole (8-5) on its central crossbeam (8-2). The connecting rod (9) passes through the bearing (19). A large gear (5), two small gears and a flywheel are mounted on the central crossbeam (8-2) of the support frame (8) through the connecting rod (9). The support frame (8) has rack holes (8-6) on its two end wing plates (8-1). The rack (14) passes through the holes (8-6), through the center of the spring (2), and is fixedly connected to the outer wall of the steel pipe. The small gear b (13) is connected to the large gear (5) through the connecting rod (9), and the two rotate coaxially through the bearing (19); the large gear (5) meshes with the small gear a (1); the small gear b (13) meshes with the rack (14); The pinion a (1) rotates coaxially with the flywheel.

4. The inertial capacitance particle-type transmission tower vibration damping device with multi-directional control function according to claim 3, characterized in that, The flywheel is divided into a perimeter flywheel (12) and an inner flywheel (11) according to the distribution position of the inertia container, and the two have equal moments of inertia.

5. The inertial capacitive particle-type transmission tower vibration damping device with multi-directional control function according to claim 1, characterized in that, The steel pipes are divided into four steel pipes (4) and two steel pipes (3) according to their distribution position. The four steel pipes (4) are located at the apex and are divided into two parts along the diameter perpendicular to the diagonal of the rectangle, including the outer part (4-1) and the inner part. The outer part (4-1) is the same height as the outer shell (6) of the device and is fixed on the base plate (20). The inner part is taken from the left and right sides of the diagonal so that the arc of the whole steel plate is greater than the diameter of the spring (2), thereby obtaining the steel pipe component (4-2) and the steel pipe component a (4-3) and steel pipe component b (4-4) of the same size. The height of the inner part steel pipe is less than that of the outer shell (6) and is only fixedly connected to the rack (14) and moves with the rack (14). The inner steel pipe (3) is located at the intersection of the diagonals and is divided into four parts. The height of each part is the same as that of the inner part steel pipe and is also fixedly connected to the rack (14) and moves with the rack (14).

6. The inertial capacitance particle-type transmission tower vibration damping device with multi-directional control function according to claim 1, characterized in that, The spring (2) is connected to the support frame wing plate (8-1) and the steel pipe at both ends.

7. The inertial capacitive particle-type transmission tower vibration damping device with multi-directional control function according to claim 1 or 2, characterized in that, The inner wall of the steel pipe is lined with a viscoelastic material.

8. The inertial capacitance particle-type transmission tower vibration damping device with multi-directional control function according to claim 1 or 2, characterized in that, The support frame (8) is an H-shaped support frame.

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