A kind of spacer based on hydraulic inertia damper amplification type

Abstract

The application relates to a hydraulic inertia damper amplification type spacer rod, which comprises a spacer rod frame, a damping spacer rod connected outside the spacer rod frame, and a wire clamp connected to the damping spacer rod. The damping spacer rod is connected with springs on both sides, and a torsional energy dissipation unit is arranged at the contact position of the damping spacer rod and the spacer rod frame. A hydraulic inertia damper is arranged inside the spacer rod frame, and the hydraulic inertia damper is connected with a mass ball through a spring. The energy dissipation and vibration reduction effect of the application is good.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of vibration control of transmission line spacing in overhead transmission line engineering, and particularly relates to a hydraulic inertia damper amplification type spacer, which is mainly used for controlling the vibration and torsion of conductors in a transmission line. BACKGROUND

[0002] The spacer refers to a conductor anti-dancing device installed on split conductors to fix the spacing between the split conductors, so as to prevent the conductors from whipping each other, inhibit the wind vibration and sub-span oscillation. The most important means to solve the conductor dancing in the transmission line is to install the device with the anti-dancing function in the line design or operation stage for the line section with the possibility of dancing. The transmission line is generally multi-split, and the spacer is generally needed to prevent the vibration of the transmission line. However, with the trend of increasing conductor cross section and increasing number of split, the situation of anti-dancing of the transmission line is more severe, and higher requirements are put forward for the anti-dancing work of the transmission line. The existing anti-dancing spacer is mostly passive anti-dancing, cannot be self-regulated and controlled, and is mostly one-way anti-dancing. However, in the actual conductor dancing process, the spacer needs to bear the horizontal force, vertical force and torsion force, so the current spacer device has limited constraint ability for the transmission conductor, and cannot meet the requirements of the current power industry such as extra-high voltage, long distance and large span. It is necessary to further optimize the performance of the spacer. SUMMARY

[0003] The present application is to overcome the deficiencies of the prior art, and provides a hydraulic inertia damper amplification type spacer, which solves the problem of insufficient constraint ability of the transmission line under the excitation of vibration and torsion.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0005] This invention proposes a hydraulic inertial-capacitive damping amplification spacer, comprising a spacer frame, multiple damping spacers connected to the outside of the spacer frame, each damping spacer connected to a clamp, adjacent damping spacers connected by springs, and a torsional energy dissipation unit provided at the contact point between the damping spacers and the spacer frame. Multiple hydraulic inertial containers are also disposed inside the spacer frame, and these hydraulic inertial containers are connected to the same mass ball located in the inner ring of the spacer frame by multiple springs. Each hydraulic inertial container includes a protective sleeve, a viscous damper, springs, a connecting plate, a flywheel, a lead screw seat, a first permanent magnet, a conductor plate, a ball screw, and a ball nut. A ball nut is fixed to the lower part of the protective sleeve, and the ball screw, in conjunction with the ball nut, causes axial movement and simultaneous rotation around an axis. A lead screw seat is located in the middle of the protective sleeve. A coaxially rotating flywheel is fixed to the top of the ball screw, and a conductor plate is connected to the outside of the flywheel. A first permanent magnet is disposed on the inner side of the protective sleeve within the axial movement range of the flywheel to provide a stable magnetic field. A connecting plate is installed on the top of the flywheel. The upper part of the connecting plate is connected to the lower part of the spring and the viscous damper, and the upper part of the spring and the viscous damper is connected to the protective sleeve.

[0006] As a further technical solution, the flywheel is a cylindrical body with a certain height, and the inner wall of the flywheel is provided with vibration damping rubber attached to the inner wall of the flywheel. The flywheel is filled with damping fluid and mass balls.

[0007] As a further technical solution, the torsional energy dissipation unit includes a positioning shaft, a metal gear, and a second permanent magnet. The damping spacer is connected to the spacer frame via the positioning shaft, with the metal gear fixed to the top and bottom of the positioning shaft. The second permanent magnet is attached to the upper and lower sides of the interior of the spacer frame, respectively.

[0008] As a further technical solution, a limiting plate is provided on the outside of the torsional energy dissipation unit, and vibration damping material is attached to the limiting plate.

[0009] As a further technical solution, the damping clamp is provided with an anti-loosening rubber sleeve inside.

[0010] As a further technical solution, the spring is made of shape memory alloy material, which has good deformation recovery ability.

[0011] As a further technical solution, the protective sleeve of the spacer frame is made of fiber-reinforced composite material.

[0012] Specifically, the working principle of this invention is as follows:

[0013] When a vertical or horizontal excitation is transmitted from the power line, the spacer bar vibrates vertically or horizontally. The mass ball in the middle of the spacer bar will generate a relative displacement in the vertical or horizontal direction. When the mass ball is displaced, it will generate a clamping or tensile force on the ball screw in the hydraulic inertial container, thereby driving the ball screw to move axially relative to the ball nut. The ball nut drives the ball screw to rotate around the axis while moving axially. On the one hand, the ball screw drives the flywheel to generate a huge inertial mass, and at the same time drives the return spring to stretch or compress and accumulate elastic potential energy. Meanwhile, the viscous damper absorbs and dissipates the vibration energy. On the other hand, the flywheel contains damping fluid and mass balls, and the flywheel is connected to a conductor plate. When the flywheel rotates, the mass balls inside collide with the damping rubber on the flywheel wall under the action of centrifugal force, dissipating energy through collision. When the flywheel rotates, the outer conductor plate will cut the first permanent magnet on the protective sleeve, generating eddy currents under the action of the magnetic field. Due to the thermal effect of the current, the vibration energy is converted into heat energy, thereby reducing vibration.

[0014] When torsional vibrations occur in the transmission line, the springs on both sides of the damping spacer compress at one end and extend at the other. The energy stored in the compressed and extended springs returns the damping spacer to its equilibrium position. Furthermore, the torsion of the damping spacer drives the metal gears on both sides of its positioning shaft to rotate. Since a permanent magnet is installed within the spacer frame to provide a stable magnetic field, the rotation of the damping spacer causes the metal gears to act as conductor plates, cutting the permanent magnets and generating eddy currents. The thermal effect of the current dissipates the energy of the torsional vibration, thus achieving vibration reduction. A limiting plate is also installed on the torsional energy dissipation unit to limit excessive torsional displacement of the damping spacer.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] This invention combines a hydraulic inertial container with eddy current energy dissipation (the cooperation between the flywheel and the first permanent magnet, and the cooperation between the metal gear and the second permanent magnet) to achieve semi-active control, reduce the vibration of the spacer bar in the vertical, horizontal and torsional directions, change the singleness and limitations of passive control and unidirectional anti-galloping, make the spacer bar more in line with the actual galloping damage form, and achieve better anti-galloping effect.

[0017] This invention combines a hydraulic inertial container, a spring, and a viscous damper to work together, thereby forming a complete dynamic system in terms of mass, stiffness, and damping, taking into account both energy absorption and energy dissipation.

[0018] This invention uses a large amount of homogeneous fiber-reinforced composite material (FRP), and the hydraulic inertial container adopts a hollow design, which reduces the weight of the entire device and the burden on the power transmission line. At the same time, the design is reasonable, the installation and maintenance are simple, and the vibration reduction effect is obvious. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0020] Figure 1 This is a schematic diagram of an overall structure of a hydraulically inertial-capacitive damping amplified spacer bar;

[0021] Figure 2 This is a schematic diagram of a hydraulic inertial container based on a hydraulically inertial-capacitive damping amplified spacer bar.

[0022] Figure 3 This is a cross-sectional view of an amplified spacer bar AA based on hydraulic inertial-capacitive damping;

[0023] Figure 4 This is a cross-sectional view of a hydraulically inertial-capacitive damping amplified spacer bar (BB).

[0024] In the diagram: 1. Spacer frame, 2. Damping spacer, 3. Damping clamp, 4. Hydraulic inertia container, 5. Protective sleeve, 6. First spring, 7. Viscous damper, 8. Connecting plate, 9-1. First permanent magnet, 9-2. Second permanent magnet, 10. Conductor plate, 11. Vibration damping rubber, 12. Mass ball, 13. Damping fluid, 14. Ball screw, 15. Flywheel, 16. Ball nut, 17. Ball screw, 18. Connecting rod, 19. Second spring, 20. Torsional energy dissipation unit, 21. Metal gear, 22. Positioning shaft, 23. Limiting plate, 24. Third spring, 25. Mass ball. Detailed Implementation

[0025] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] 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 exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. 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, groups and / or combinations thereof.

[0027] For ease of description, the words "up," "down," "left," and "right" appearing in this invention only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings themselves. They do not limit the structure and are merely for the purpose of facilitating the description of this invention and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] Terminology Explanation: The terms "installation," "connection," "linking," and "fixing" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can be a mechanical connection or an electrical connection; they can be a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances. The embodiments of this invention are described in detail below with reference to the technical solutions and accompanying drawings.

[0029] like Figure 1 As shown, this embodiment provides a hydraulic inertial-capacitive damping amplified spacer, including a spacer frame 1, four damping spacers 2 connected to the outside of the spacer frame 1, and a damping clamp 3 fixedly connected to the end of each damping spacer 2, which is connected to the transmission line; adjacent damping spacers 2 are connected by second springs 19, the four second springs 19 form a rectangle, the four second springs 19 are located on the outer ring of the spacer frame 1, and a torsional energy dissipation unit 20 is provided at the contact part between the damping spacer 2 and the spacer frame 1, so that the damping spacer 2 and the spacer frame 1 can be torsional relative to each other, changing the singleness and limitation of passive control and unidirectional anti-galloping; furthermore, four hydraulic inertial containers 4 are provided inside the spacer frame 1, and the four hydraulic inertial containers 4 are connected to the same mass ball 25 through a third spring 24.

[0030] Furthermore, the aforementioned spacer frame 1 is a circular frame, with four damping spacers 2 evenly arranged around the outer ring of the circular frame along its circumference, and four hydraulic inertia containers 4 evenly arranged around the inner ring of the circular frame along its circumference. Initially, each damping spacer 2 and each hydraulic inertia container 4 is arranged along the radial direction of the circular frame. When subjected to external force, the positions of the hydraulic inertia containers 4 and the damping spacers 2 will change. The positions of the four hydraulic inertia containers 4 correspond to the four damping spacers 2, with one hydraulic inertia container 4 corresponding to one damping spacer 2.

[0031] Furthermore, such as Figure 2 As shown, the four hydraulic inertial containers have the same structure, and the structure of each hydraulic inertial container 4 is as follows: Figure 2As shown, the device includes a protective sleeve 5, a first spring 6, a viscous damper 7, a connecting plate 8, a flywheel 15, a lead screw seat 14, a first permanent magnet 9-1, a conductor plate 10, a ball screw 17, and a ball nut 16. A connecting rod 18 is fixedly connected to the top of the protective sleeve 5, and the connecting rod 18 is connected to the spacer frame 1. A ball nut 16 is located on the lower side inside the protective sleeve 5 and is fixedly connected to the protective sleeve 5. The ball screw 17 cooperates with the ball nut 16 to generate axial movement and simultaneously rotate around its axis. A lead screw seat 14 is located in the middle of the interior of the protective sleeve 5, through which the ball screw 17 passes, ensuring axial movement. A coaxially rotating flywheel 15 is fixedly connected to the top of the ball screw 17. Four conductor plates 10 are fixedly connected to the outside of the flywheel 15, and a ring of first permanent magnets 9-1 is attached to the inside of the protective sleeve within the axial movement range of the flywheel 10 to provide a stable magnetic field for the four conductor plates 10. A connecting plate 8 is provided on the top of the flywheel 15, which can remain stationary while the flywheel 15 rotates. The lower ends of the first spring 6 and the viscous damper 7 are fixed to the connecting plate 8, and the upper parts of the first spring 6 and the viscous damper 7 are connected to the inner wall of the top of the protective sleeve 5.

[0032] Furthermore, the flywheel 15 is a cylindrical body with a certain height, and the inner wall of the flywheel 15 is provided with vibration damping rubber 11 attached to the inner wall of the flywheel 15. The flywheel 15 is also filled with damping fluid 13 and a small ball 12.

[0033] Furthermore, such as Figure 4 As shown, four viscous dampers 7 are provided, and the four viscous dampers 7 are located on the outer ring of the first spring 6.

[0034] Furthermore, the torsional energy dissipation unit 20 includes a positioning shaft 22, a metal gear 21, and a second permanent magnet 9-2. The damping spacer 2 is connected to the spacer frame 1 via the positioning shaft 22. Specifically, the damping spacer 2 has an opening at its end, and the spacer frame 1 also has an opening. The damping spacer 2 is embedded in the spacer frame 1. The positioning shaft 22 passes through the spacer frame 1 and the damping spacer 2, thus connecting the damping spacer 2, the spacer frame 1, and the positioning shaft 22. Figure 1 Taking the indicated direction as an example, Figure 1 The axes of the four positioning shafts 22 are perpendicular to the plane of the paper; and metal gears 21 are fixed at both ends of the positioning shafts 22. When the positioning shafts 22 rotate, the metal gears 21 can also rotate together. The second permanent magnet 9-2 is pasted inside the spacer frame 1 to provide a stable magnetic field. The torsion of the damping spacer 2 will drive the metal gears 21 on the upper and lower sides of its positioning shafts 22 to rotate. Since the second permanent magnet 9-2 is set inside the spacer frame 1 to provide a stable magnetic field, the rotation of the damping spacer 2 drives the metal gears 21 to act as conductor plates to rotate and cut the second permanent magnet 9-2, generating eddy currents. Due to the thermal effect of the current, the energy of the torsional vibration will be dissipated, thereby achieving the effect of vibration reduction.

[0035] Furthermore, such as Figure 1 As shown, the torsional energy dissipation unit 20 is provided with a limiting plate 23 on the outside, and the limiting plate 23 can be fixed on the spacer frame 1; furthermore, the limiting plate 23 is attached with vibration damping material to prevent the damping spacer 2 from generating excessive displacement.

[0036] Furthermore, the damping clamp 3 is equipped with an anti-loosening rubber sleeve inside to prevent loosening when clamping the wire.

[0037] Furthermore, the first spring 6, the second spring 19, and the third spring 24 are all made of shape memory alloy material, which has good deformation recovery ability.

[0038] Furthermore, both the spacer frame 1 and the protective sleeve 5 are made of fiber reinforced polymer (FRP), which is lightweight and high-strength, reducing the weight of the entire device.

[0039] In this embodiment, the spacer is installed between the split conductors. When the transmission line transmits vertical or horizontal excitation, the spacer vibrates vertically or horizontally. The mass ball 25 in the middle of the spacer will generate a relative displacement in the vertical or horizontal direction. When the mass ball 25 is displaced, it will generate a clamping or tensile force on the ball screw 17 in the hydraulic inertial container 4, thereby driving the ball screw 17 to move axially relative to the ball nut 16. This causes the ball nut 16 to drive the ball screw 17 to rotate around the axis while moving axially. On the one hand, the ball screw 17 drives the flywheel 15 to generate a large force. The large inertial mass simultaneously drives the first spring 6 to stretch or compress, accumulating elastic potential energy. Meanwhile, the viscous damper 7 absorbs and dissipates the energy of vibration. On the other hand, the flywheel 15 contains damping fluid 13 and a small ball 12. The flywheel 15 is externally connected to a conductor plate 10. When the flywheel 15 rotates, the small ball 12 inside collidees with the vibration-damping rubber 11 on the inner wall of the flywheel 15 under centrifugal force, dissipating energy through this collision. Furthermore, as the flywheel 15 rotates, the external conductor plate 12 cuts the first permanent magnet 9-1 on the protective sleeve 5, generating eddy currents under the influence of the magnetic field. Due to the thermal effect of the current, the energy of vibration is converted into heat energy, thereby reducing vibration.

[0040] When the transmission line transmits torsional vibration, the second springs 19 on both sides of the damping spacer 2 are compressed at one end and extended at the other. The compressed and extended springs accumulate energy, causing the damping spacer 2 to return to its equilibrium position. Furthermore, the torsion of the damping spacer 2 will drive the metal gears 21 on both sides of its positioning shaft 22 to rotate. Since a second permanent magnet 9-2 is provided inside the spacer frame 1 to provide a stable magnetic field, the rotation of the damping spacer 2 drives the metal gears 21 to act as conductor plates, cutting the second permanent magnet 9-2 and generating eddy currents. Due to the thermal effect of the current, the energy of the torsional vibration is dissipated, thereby achieving the vibration reduction effect. In addition, a limiting plate 23 is set outside the torsional energy dissipation unit 20 to limit the damping spacer 2 from generating excessive torsional displacement.

[0041] The above-described embodiments of this patent are not intended to limit the scope of protection of this invention. The implementation methods of this patent are not limited thereto. All other modifications, substitutions or alterations made to the above-described structure of this patent based on the above-described content of this patent and in accordance with ordinary technical knowledge and common practices in the field, without departing from the basic technical idea of ​​this patent, shall fall within the scope of protection of this patent.

Claims

1. A hydraulically inertial-capacitive damping amplified spacer bar, characterized in that, The system includes a spacer frame, with multiple damping spacers connected to the outside of the spacer frame. Each damping spacer is connected to a clamp, and adjacent damping spacers are connected by a second spring. Torsional energy dissipation units are installed at the contact points between the damping spacers and the spacer frame. Multiple hydraulic inertia containers are installed inside the spacer frame, and these hydraulic inertia containers are connected to the same mass ball located within the inner ring of the spacer frame via a third spring. Each hydraulic inertia container includes a protective sleeve, a viscous damper, a first spring, a connecting plate, a flywheel, a first permanent magnet, a conductor plate, a ball screw, and a roller. The ball nut is fixed to the inner ring of the lower part of the protective sleeve. The ball screw works with the ball nut to make the ball screw move axially and rotate around the axis at the same time. The top of the ball screw is fixed to a coaxially rotating flywheel. The outer side of the flywheel is connected to a conductor plate. A first permanent magnet is set on the inner side of the protective sleeve within the axial movement range of the flywheel to provide a stable magnetic field. A connecting plate is set on the top of the flywheel. The connecting plate can remain stationary when the flywheel rotates. The upper part of the connecting plate is connected to the lower part of the first spring and the viscous damper. The upper parts of the first spring and the viscous damper are both connected to the top wall inside the protective sleeve. A screw seat is provided in the middle of the protective sleeve for the ball screw to pass through, so as to ensure that the ball screw moves axially. The flywheel is a cylindrical body with a certain height. The inner wall of the flywheel is provided with vibration damping rubber, which is attached to the inner wall of the flywheel. The flywheel is filled with damping fluid and small balls. When the mass ball is displaced, it causes the ball screw to move axially relative to the ball nut, which in turn causes the ball screw to rotate around the axis while moving axially. During the rotation of the flywheel, the small mass ball inside the flywheel collides with the vibration damping rubber on the inner wall of the flywheel under the action of centrifugal force. At the same time, the conductor plate outside the flywheel cuts the magnetic field of the first permanent magnet and generates eddy currents.

2. The hydraulically inertial-capacitive damping amplified spacer as described in claim 1, characterized in that, The torsional energy dissipation unit includes a positioning shaft, a metal gear, and a second permanent magnet. The damping spacer is connected to the spacer frame via the positioning shaft, and the metal gear is fixed to both ends of the positioning shaft. The second permanent magnet is attached to the upper and lower sides of the spacer frame. The rotation of the damping spacer drives the metal gear to rotate to cut the magnetic field of the second permanent magnet, generating eddy currents.

3. The hydraulically inertial-capacitive damping amplified spacer as described in claim 2, characterized in that, The torsional energy dissipation unit is provided with a limiting plate on the outside to limit the torsional displacement of the damping spacer, and vibration damping material is attached to the limiting plate.

4. The hydraulically inertial-capacitive damping amplified spacer as described in claim 1, characterized in that, The clamp is equipped with an anti-loosening rubber sleeve inside.

5. A hydraulically inertial-capacitive damping amplified spacer as described in claim 1, characterized in that, The first spring, the second spring, and the third spring are all made of shape memory alloy material.

6. The hydraulically inertial-capacitive damping amplified spacer as described in claim 1, characterized in that, The spacer frame and protective sleeve are both made of fiber-reinforced composite material.

7. A hydraulically inertial-capacitive damping amplified spacer as described in claim 1, characterized in that, The spacer frame is a circular frame, with multiple damping spacers evenly distributed along the outer ring of the circular frame.

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