CN115912228A - An amplified spacer bar based on hydraulic inertial capacity damping - Google Patents

Abstract

The invention relates to a spacer based on hydraulic inerter damping amplification, which comprises a spacer frame, wherein the outside of the spacer frame is connected with a damping spacer, and the damping spacer is connected with a wire clamp. And springs are connected with two sides of the damping spacer, and a torsion energy consumption unit is arranged at the contact part of the damping spacer and the spacer frame. The spacer frame is internally provided with a hydraulic inerter, and the hydraulic inerter is connected with the mass ball through a spring. The invention has good energy consumption and vibration reduction effects.

Description

An amplified spacer bar based on hydraulic inertial capacity damping

technical field

The invention belongs to the field of vibration reduction control of transmission line intervals in overhead transmission line engineering, and in particular relates to a hydraulic inertial capacity damping amplified spacer, which is mainly used to control the vibration and torsion of conductors in transmission lines.

Background technique

The spacer bar refers to a wire anti-galling device installed on the split wires to fix the distance between each split wire to prevent the wires from whipping each other, suppressing breeze vibration and sub-gap vibration. At present, the most important means to solve conductor galloping in transmission lines is to install anti- galloping equipment on line sections where galloping may occur during the line design or operation phase. The transmission line is generally multi-split, and spacers are generally required to prevent the vibration of the transmission line. However, with the trend of increasing conductor cross-section and splitting number of transmission lines, the situation of anti-galling of transmission lines is more severe, and higher requirements are put forward for anti-galling work of transmission lines. At present, most of the existing anti-dancing spacers are passive anti-dancing, which cannot be adjusted spontaneously, and most of them are one-way anti-dancing. However, in the actual process of conductor galloping, the spacers need to bear horizontal force, vertical force and torsional force, so the current The spacer device has limited ability to restrain the transmission wires, and cannot meet the UHV, long-distance, and large-span transmission requirements of the current power industry. It is very necessary to further optimize the performance of the spacer.

Contents of the invention

In order to overcome the shortcomings of the prior art, the present invention provides an amplified spacer rod based on hydraulic inertial capacity damping, which solves the problem of insufficient restraint ability of transmission lines under the excitation of vibration and torsion.

In order to achieve the above object, the technical scheme adopted in the present invention is:

The present invention proposes a spacer bar based on hydraulic inertial capacity damping amplification, which includes a spacer frame, and a plurality of damping spacer bars are connected to the outside of the spacer bar frame, and each damping spacer bar is connected to a wire clamp. It is connected by a spring, and a torsional energy dissipation unit is set at the contact part between the damping spacer and the spacer frame, and multiple hydraulic inerters are also set inside the spacer frame, and multiple hydraulic inerters are connected to the spacer frame through multiple springs. The inner ring is connected with a mass ball, and the hydraulic inerter includes a protective sleeve, a viscous damper, a spring, a connecting plate, a flywheel, a screw seat, a first permanent magnet, a conductor plate, a ball screw and a ball Nut; there is a ball nut fixedly connected with the protective sleeve at the lower part of the protective sleeve, and the ball screw cooperates with the ball nut to make the ball screw generate axial movement and rotate around the axis at the same time. A screw seat is arranged in the middle of the protective cover. A coaxially rotating flywheel is fixed on the top of the ball screw, the outer side of the flywheel is connected to the conductor plate, and a first permanent magnet is arranged 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 arranged on the top of the flywheel, the upper part of the connecting plate is connected with the spring and the lower part of the viscous damper, and the upper part of the spring and the viscous damper is connected with the protective cover.

As a further technical solution, the flywheel is a cylinder with a certain height, the inner wall of the flywheel is provided with damping rubber attached to the inner wall of the flywheel, and the inside of the flywheel is equipped with damping fluid and mass balls.

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 frame of the spacer through a positioning shaft, and the top and bottom of the positioning shaft are fixedly connected with metal gears. A second permanent magnet is respectively pasted on the upper side and the lower side of the spacer frame inside.

As a further technical solution, a limiting plate is arranged outside the torsional energy dissipation unit, and a vibration-damping material is pasted on the limiting plate.

As a further technical solution, an anti-loosening rubber sleeve is arranged inside the damping wire clamp.

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

As a further technical solution, the protective cover of the spacer frame is made of fiber reinforced composite material.

Specifically, the working principle of the present invention is as follows:

When the transmission line is excited in the vertical or horizontal direction, the spacer bar will vibrate in the vertical or horizontal direction, and the mass ball in the middle of the spacer bar will produce a relative displacement in the vertical or horizontal direction. In the hydraulic inerter, the ball screw generates compression force or tensile force to drive the ball screw to move axially relative to the ball nut, so that the ball nut drives the ball screw to rotate around the axial direction 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 to store elastic potential energy. At the same time, the viscous damper absorbs and consumes the vibration energy; on the other hand, there are damping fluid and mass balls inside the flywheel. Connected to the conductor plate, when the flywheel rotates, its internal mass ball will collide with the vibration-damping rubber on the flywheel wall under the action of centrifugal force, and dissipate energy through the collision, and its external conductor plate will cut the protective sleeve when the flywheel rotates. The first permanent magnet generates eddy current under the action of the magnetic field. Due to the thermal effect of the current, the energy of the vibration is converted into heat energy, thereby reducing the vibration.

When the transmission line transmits torsional vibration, one end of the spring on the left and right sides of the damping spacer rod is compressed and the other end is extended. The compressed and elongated springs accumulate energy to make the damping spacer rod return to the equilibrium position. Further, the torsion of the damping spacer rod will drive its The metal gears on the upper and lower sides of the positioning shaft rotate. Since the permanent magnets are provided in the spacer frame to provide a stable magnetic field, the rotation of the damping spacer drives the metal gears to act as conductor plates to rotate and cut the permanent magnets, generating eddy currents. Due to the thermal effect of the current, the energy of torsional vibration will be dissipated, so as to achieve the effect of vibration reduction. And a limiting plate is set on the torsional energy dissipation unit to limit the excessive torsional displacement of the damping spacer rods.

Compared with prior art, the benefit of the present invention is:

The present invention adopts the combination of hydraulic inerter and eddy current energy consumption (the cooperation of flywheel and first permanent magnet, the cooperation of metal gear and second permanent magnet), realizes semi-active control, and reduces the vertical Vibration in three directions, horizontal and torsional, changes the singleness and limitation of passive control and one-way anti-galling, makes the spacer more suitable for the actual form of galloping damage, and achieves a better anti-galling effect.

The invention combines hydraulic inerters, springs and viscous dampers to work together to form a complete dynamic system in terms of mass, stiffness and damping, taking into account the functions of energy absorption and energy dissipation.

The invention adopts a large amount of homogeneous fiber-reinforced composite material (FRP), and the hydraulic inerter adopts a hollow design form, which reduces the weight of the whole device, and has a small burden on the transmission line. At the same time, the design is reasonable and the installation and maintenance are simple. , the damping effect is obvious.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and not to limit the present application.

Fig. 1 is a schematic diagram of the overall structure of an amplified spacer rod based on hydraulic inertial capacity damping;

Fig. 2 is a schematic diagram of a hydraulic inerter based on a hydraulic inertial capacity damping amplified spacer bar;

Fig. 3 is a sectional view of an enlarged spacer bar A-A based on hydraulic inertial capacity damping;

Fig. 4 is a kind of B-B sectional view of amplified spacer bar based on hydraulic inertial damping;

In the figure: 1 spacer frame, 2 damping spacer, 3 damping wire clamp, 4 hydraulic inerter, 5 protective cover, 6 first spring, 7 viscous damper, 8 connecting plate, 9-1 first permanent magnet , 9-2 second permanent magnet, 10 conductor plate, 11 damping rubber, 12 mass ball, 13 damping liquid, 14 ball screw, 15 flywheel, 16 ball nut, 17 ball screw, 18 connecting rod, 19 Two springs, 20 torsional energy dissipation units, 21 metal gears, 22 positioning shafts, 23 limit plates, 24 third springs, and 25 mass balls.

Detailed ways

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, 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 belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, groups and/or combinations thereof;

For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, it only means that they are consistent with the directions of up, down, left and right of the drawings themselves, and do not limit the structure. It is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Explanation of terms: The terms "installation", "connection", "connection", "fixation" and other terms in the present invention should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or an integral body, which can be It can be a mechanical connection, or an electrical connection, a direct connection, or an indirect connection through an intermediary, or an internal connection between two elements, or an interaction relationship between two elements. For those of ordinary skill in the art, , the specific meanings of the above terms in the present invention can be understood according to specific situations. Embodiments of the present invention will be described in detail below in conjunction with technical solutions and accompanying drawings.

As shown in Figure 1, the present embodiment provides a hydraulic inertial damping-based amplified spacer, including a spacer frame 1, the spacer frame 1 is externally connected to four damping spacers 2, and the end of each damping spacer 2 The damping clamp 3 is fixedly connected, and the damping clamp 3 is connected to the transmission line; the adjacent damping spacers 2 are connected by the second spring 19, and the four second springs 19 form a rectangle, and the four second springs 19 are located at the interval The outer ring of the rod frame 1, and the contact part of the damping spacer 2 and the spacer frame 1 is provided with a torsional energy dissipation unit 20, so that the damping spacer 2 and the spacer frame 1 can be relatively twisted, changing the passive control and one-way The singleness and limitation of anti-galling; further, four hydraulic inerters 4 are arranged inside the spacer frame 1 , and the four hydraulic inerters 4 are connected to the same mass ball 25 through the third spring 24 .

Further, the above-mentioned spacer frame 1 is a circular frame, four damping spacer bars 2 are evenly arranged on the outer ring of the circular frame along the circumferential direction of the circular frame, and the four hydraulic inerters 4 are arranged along the circular frame. The circumferential direction of the frame is evenly arranged on the inner ring of the circular frame, and in the initial state, each damping spacer 2 and each hydraulic inerter 4 are arranged along the radial direction of the circular frame. When an external force is applied, The positions of the hydraulic inerter 4 and the damping spacer 2 will change; and the positions of the four hydraulic inerters 4 correspond to the positions of the four damping spacers 2 , and one hydraulic inerter 4 corresponds to one damping spacer 2 .

Further, as shown in Figure 2, the four hydraulic inerters have the same structure, and the structure of each hydraulic inerter 4 is shown in Figure 2, including a protective sleeve 5, a first spring 6, a viscous damper 7, Connecting plate 8, flywheel 15, screw seat 14, first permanent magnet 9-1, conductor plate 10, ball screw 17 and ball nut 16, the top of described protective cover 5 is affixed to connecting rod 18, connecting rod 18 and The spacer rod frame 1 is connected, and there is a ball nut 16 on the lower side of the protective sleeve 5. The ball nut 16 is fixedly connected to the protective sleeve 5. The ball screw 17 cooperates with the ball nut 16 to make the ball screw 17 move axially and simultaneously rotate around the shaft. rotate. A screw seat 14 is set at the middle position inside the protective cover 5, and the ball screw 17 passes through the screw seat 14 to ensure that the ball screw 17 moves in the axial direction. The outer side of 15 is fixedly connected with four conductor plates 10, and a circle of first permanent magnets 9-1 is attached to the inner side of the protective cover 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 arranged on the top of the flywheel 15, and the connecting plate 8 can not rotate when the flywheel 15 rotates. The lower ends of the first spring 6 and the viscous damper 7 are fixedly connected to the connecting plate 8 , and the upper parts of the first spring 6 and the viscous damper 7 are connected with the top inner wall of the protective cover 5 .

Further, the flywheel 15 is a cylinder with a certain height, the inner wall of the flywheel 15 is provided with damping rubber 11 attached to the inner wall of the flywheel 15, and the inside of the flywheel 15 is equipped with damping fluid 13 and mass balls 12 .

Further, as shown in FIG. 4 , four viscous dampers 7 are provided, and the four viscous dampers 7 are located on the outer ring of the first spring 6 .

Further, the torsional energy dissipation unit 20 includes a positioning shaft 22, a metal gear 21 and a second permanent magnet 9-2, and the damping spacer rod 2 is connected to the spacer rod frame 1 through the positioning shaft 22, specifically, the damping spacer rod 2 Holes are opened at the end, and holes are also opened on the spacer frame 1. The damping spacer 2 is embedded in the spacer frame 1, and the positioning shaft 22 passes through the spacer frame 1 and the damping spacer 2 to realize the damping spacer 2 and the spacer. The frame 1 is connected with the positioning shaft 22, taking the orientation shown in Figure 1 as an example, the axes of the four positioning shafts 22 in Figure 1 are perpendicular to the paper; and metal gears 21 are fixed at both ends of the positioning shaft 22, when positioning When the shaft 22 rotates, the metal gear 21 can also rotate together, and the second permanent magnet 9-2 is pasted inside the spacer frame 1 to provide a stable magnetic field; The gear 21 rotates, and because the second permanent magnet 9-2 is provided with a stable magnetic field inside the spacer bar frame 1, the rotation of the damping spacer bar 2 drives the metal gear 21 to act as a conductor plate to rotate and cut the second permanent magnet 9-2 to generate electricity. vortex. Due to the thermal effect of the current, the energy of torsional vibration will be dissipated, so as to achieve the effect of vibration reduction.

Further, as shown in FIG. 1 , the torsional energy dissipation unit 20 is provided with a limiting plate 23 outside, and the limiting plate 23 can be fixed on the spacer bar frame 1; further, the limiting plate 23 is pasted with a damping material , to avoid excessive displacement of the damping spacer rod 2 .

Further, the inside of the damping wire clamp 3 is provided with an anti-loosening rubber sleeve to avoid loosening when clamping the wire.

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

Further, the spacer bar frame 1 and the protective cover 5 are both made of fiber reinforced composite material (FRP), which is light in weight and high in strength, reducing the weight of the whole device.

In this embodiment, the spacer rods are installed between the split conductors. When the transmission line transmits vertical or horizontal excitation, the spacer rods vibrate vertically or horizontally, and the mass ball 25 in the middle of the spacer rods will generate a vertical vibration. Or the relative displacement in the horizontal direction, when the mass ball 25 is displaced, it will generate a compressive force or a tensile force on the ball screw 17 in the hydraulic inerter 4, thereby driving the ball screw 17 to move axially relative to the ball nut 16, Make the ball nut 16 drive the ball screw 17 to rotate axially while moving in the axial direction. On the one hand, the ball screw 17 drives the flywheel 15 to generate a huge inertial mass, and at the same time drives the first spring 6 to stretch or compress to accumulate elastic potential energy. Viscous damper 7 can absorb and consume the energy of vibration; on the other hand, damping liquid 13 and mass ball 12 are housed inside flywheel 15, and the conductor plate 10 is connected outside flywheel 15, and its internal mass ball 12 when flywheel 15 rotates It will collide with the vibration-damping rubber 11 on the inner wall of the flywheel 15 under the action of centrifugal force, dissipate energy through the collision, and when the flywheel 15 rotates, its outer conductor plate 12 will cut the first permanent magnet 9-1 on the protective cover 5, Eddy currents are generated under the action of a magnetic field. Due to the thermal effect of the current, the energy of the vibration is converted into heat energy, thereby reducing the vibration.

When the transmission line transmits torsional vibration, one end of the second spring 19 on the left and right sides of the damping spacer 2 is compressed and the other end is extended. The energy stored in the compressed and elongated springs makes the damping spacer 2 return to the equilibrium position. Further, the damping spacer The twisting of 2 will drive the metal gears 21 on the upper and lower sides of its positioning shaft 22 to rotate. Since the 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 gear 21 to act as a magnetic field. The conductor plate rotates and cuts the second permanent magnet 9-2, generating an eddy current. Due to the thermal effect of the current, the energy of torsional vibration will be dissipated, so as to achieve the effect of vibration reduction. Furthermore, a limiting plate 23 is provided outside the torsional energy dissipation unit 20 to limit excessive torsional displacement of the damping spacer rod 2 .

The above-mentioned embodiments of this patent do not limit the scope of protection of the present invention. Under the premise of the above-mentioned basic technical ideas, other various forms of modification, replacement or change made to the above-mentioned structure of this patent shall fall within the scope of protection of this patent.

Claims (9)

1. A spacer bar based on hydraulic inerter-damper amplification is characterized by comprising a spacer bar frame, wherein the outside of the spacer bar frame is connected with a plurality of damper spacer bars, each damper spacer bar is connected with a wire clamp, adjacent damper spacer bars are connected through a spring, a torsion energy dissipation unit is arranged at the contact part of the damper spacer bars and the spacer bar frame, a plurality of hydraulic inerters are arranged in the spacer bar frame, and the hydraulic inerters are connected with the same mass ball positioned at the inner ring of the spacer bar frame through the springs; the hydraulic inerter comprises a protective sleeve, a viscous damper, a spring, a connecting plate, a flywheel, a first permanent magnet, a conductor plate, a ball screw and a ball nut, wherein an inner ring at the lower part of the protective sleeve is fixedly connected with the ball nut, and the ball screw is matched with the ball nut to enable the ball screw to generate axial movement and simultaneously rotate around a shaft; the top of the ball screw is fixedly connected with a coaxially rotating flywheel, the outer side of the flywheel is connected with a conductor plate, a permanent magnet is arranged in the axial movement range of the flywheel close to the inner side of the protective sleeve to provide a stable magnetic field, the top of the flywheel is provided with a connecting plate, the upper part of the connecting plate is connected with the lower parts of the spring and the viscous damper, and the upper parts of the spring and the viscous damper are connected with the protective sleeve.

2. The spacer as claimed in claim 1, wherein a screw seat is provided at a central position of the shield.

3. The spacer bar as claimed in claim 1, wherein the flywheel is a cylinder with a certain height, the inner wall of the flywheel is provided with damping rubber attached to the inner wall of the flywheel, and the inside of the flywheel is filled with damping liquid and small balls.

4. The spacer bar based on hydraulic inerter damping amplification as claimed in claim 1, wherein the torsional energy dissipation unit comprises a positioning shaft, a metal gear and a second permanent magnet, the spacer bar is connected with the spacer bar frame through the positioning shaft, the metal gear is fixedly connected to two ends of the positioning shaft, and the second permanent magnet is respectively adhered to the upper side and the lower side of the inside of the spacer bar frame.

5. The spacer bar based on hydraulic inerter damping amplification as claimed in claim 4, wherein a limiting plate is disposed outside the torsional dissipative unit, and a damping material is adhered to the limiting plate.

6. The spacer bar based on the amplification of hydraulic inerter damping of claim 1, wherein a locking rubber sleeve is arranged inside the damping wire clamp.

7. The spacer as claimed in claim 1 wherein the spring is made of a memory alloy material.

8. The spacer of claim 1 wherein the spacer frame shield is made of a fiber reinforced composite material.

9. The spacer bar of claim 1, wherein the spacer bar frame is a circular ring frame, and the plurality of spacer bars are uniformly distributed along the outer ring of the circular ring frame.

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