High-damping combined type anti-galloping vibration reduction device

Abstract

The invention discloses a high-damping combined type anti-galloping vibration reduction device which comprises an outer cylinder and a pressing rod arranged on one side of the outer cylinder. And the anchoring part is arranged between the outer cylinder and the pressing rod. When different-phase power transmission lines swing in a small amplitude in the axial direction of the device, a sliding block in the device moves along a guide rod in the direction opposite to the swing direction, acting force opposite to the moving direction of the power transmission lines is provided for the power transmission lines, and the swing amplitude of the power transmission lines can be reduced; when the galloping amplitude of the power transmission line is large, an outer cylinder and a pressing rod in the damping unit start to generate relative displacement, and when the outer cylinder and the pressing rod move oppositely, a shape memory alloy wire is stretched to generate energy consumption; when the outer cylinder and the pressing rod move back to back, the pressing rod and the viscous-elastic material layer are in sliding friction with each other and extrude the viscous-elastic material layer to provide damping force, so that the galloping amplitude of a power transmission line is reduced, and the length of the insulator rod can be adjusted by additionally arranging the adjusting piece.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power transmission line anti-dancing and damping, and in particular to a high-damping composite anti-dancing and damping device. BACKGROUND

[0002] A safe and stable power system is an important guarantee for national industrial development, and overhead high-voltage transmission lines are closely related to the safety benefits. In many places, due to the influence of terrain and location, the icing phenomenon of power transmission lines by glaze is common, and the impact load generated by the melting and falling of ice causes the conductor to dance greatly, which is easy to cause harm to the power transmission line from phase-to-phase flashover to wire breakage and tower collapse;

[0003] The current anti-dancing measure is mainly to install anti-dancing devices such as spoiler anti-dancing device and double pendulum anti-dancing device, among which the spacer rod is widely used and has the advantages of high tensile strength, light weight, and pollution flashover resistance. However, the ordinary spacer rod has the problems of easy deformation, no energy dissipation capacity, easy fatigue leading to damage of the connecting hardware, and the like, and due to the low damping, it cannot quickly calm the long-time power transmission line dancing, which will continuously impact the conductor and the power transmission tower, affecting the safe operation of the line. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is that the existing anti-dancing device has the problems of easy adverse deformation, no energy dissipation capacity, and easy fatigue leading to damage of the connecting hardware.

[0005] The above technical problem is solved by the following technical scheme: the present application provides a high-damping composite anti-dancing and damping device, which comprises an outer cylinder, a pressing rod arranged on one side of the outer cylinder, an anchoring member arranged between the outer cylinder and the pressing rod, and a damping member arranged in the outer cylinder and matched with the pressing rod. When the outer cylinder and the pressing rod move away from each other, the anchoring member generates damping force by stretching, and when the outer cylinder and the pressing rod move towards each other, the damping member generates damping force by friction and extrusion, so as to dissipate the energy of the power transmission line dancing and reduce the dancing of the power transmission line.

[0006] In one preferred embodiment of the high-damping composite anti-dancing and damping device, the anchoring member comprises a circular plate one arranged outside the pressing rod and a circular plate two arranged at the other end of the outer cylinder, the circular plate one and the circular plate two are uniformly provided with a plurality of through holes in the radial direction, and alloy wires are connected in the through holes on both sides.

[0007] In one preferred embodiment of the high-damping composite anti-dancing and damping device, the damping member comprises a circular disc arranged on the other side of the pressing rod and a viscoelastic material layer arranged on the inner wall of the outer cylinder.

[0008] In a preferred embodiment of the high-damping composite anti-dancing vibration damper, the inner side of the viscoelastic material layer is provided with a slope extending from outside to inside, and the axial section of the viscoelastic material layer and the disc are trapezoidal.

[0009] In a preferred embodiment of the high-damping composite anti-dancing vibration damper, the sliding block is provided with a through hole at the middle position, and the guide rod passes through the through hole at the middle position of the sliding block; the sliding block is connected to the right disc of the outer cylinder through the spring.

[0010] In a preferred embodiment of the high-damping composite anti-dancing vibration damper, the sliding block is in the shape of "O", the inner diameter of the sliding block matches the diameter of the guide rod, and the spring is sleeved on the outside of the guide rod.

[0011] In a preferred embodiment of the high-damping composite anti-dancing vibration damper, the end of the pressing rod is provided with a disc, the disc is in the shape of a truncated cone, and a circular hole is arranged at the middle position of the disc.

[0012] The guide rod extends into the circular hole, ensuring that the pressing rod and the outer cylinder move on the same axis.

[0013] In a preferred embodiment of the high-damping composite anti-dancing vibration damper, a sleeve is connected to one side of the pressing rod through a flange screw, a connecting rod is arranged on the sleeve, and an insulator is arranged on the connecting rod; an adjusting member is arranged in the sleeve and cooperates with the connecting rod.

[0014] In a preferred embodiment of the high-damping composite anti-dancing vibration damper, the adjusting member includes a plurality of connecting holes arranged on the outside of the connecting rod and the sleeve, and fastening bolts arranged in the connecting holes.

[0015] In a preferred embodiment of the high-damping composite anti-dancing vibration damper, the outer diameter of the connecting rod is slightly smaller than the inner diameter of the sleeve.

[0016] The high-damping composite anti-dancing vibration damper has the following beneficial effects: when different phase transmission lines produce small amplitude dancing along the axis of the device, the sliding block inside the device moves along the guide rod in the opposite direction of the dancing direction, providing an opposite force to the transmission line, which can reduce the dancing amplitude of the transmission line; when the transmission line produces a larger dancing amplitude, the outer cylinder and the pressing rod in the damping unit start to move relative to each other, when the outer cylinder and the pressing rod move towards each other, the shape memory alloy wire is stretched to generate energy consumption; when the outer cylinder and the pressing rod move away from each other, the pressing rod slides and rubs against the viscoelastic material layer and squeezes the viscoelastic material layer, providing damping force, thereby reducing the dancing amplitude of the transmission line; and through the addition of the adjusting member, the length of the insulator rod can be adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings in the following description only relate to some embodiments of the present application and are not a limitation on the present application. Among them:

[0018] Figure 1 A whole structure planar section view of a high-damping composite anti-dancing vibration damper is shown;

[0019] Figure 2 A section view of a damping member in a high-damping composite anti-dancing vibration damper is shown;

[0020] Figure 3 A section view of an adjusting member in a high-damping composite anti-dancing vibration damper is shown. DETAILED DESCRIPTION

[0021] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with specific embodiments and drawings.

[0022] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions about the present application, but these terms can be changed according to the intention of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meaning of the terms and the overall description of the present application.

[0023] The present embodiment provides a high-damping composite anti-dancing vibration damper, which comprises an outer cylinder 1, a pressing rod 11 arranged on one side of the outer cylinder 1, an anchoring member 2 arranged between the outer cylinder 1 and the pressing rod 11, and a damping member 3 arranged in the outer cylinder 1 and matched with the pressing rod 11. When the outer cylinder 1 and the pressing rod 11 move away from each other, the anchoring member 2 generates damping force by stretching, and when the outer cylinder 1 and the pressing rod 11 move towards each other, the damping member 3 generates damping force by friction and extrusion, so as to dissipate the energy of the dancing of the power transmission line and reduce the dancing of the power transmission line.

[0024] Among them, the outer cylinder 1 and the pressing rod 11 cooperate to form axial relative movement, ensuring that the vibration energy is transmitted along the axis, and one end of the pressing rod 11 is connected to the adjusting member through a flange, and the pressing rod 11 transmits the tension and pressure generated by the dancing of the power transmission line to the outer cylinder 1.

[0025] Further, with reference to Figure 1, the anchor 2 includes a round plate one 21, a round plate two 22, a through hole 23 and an alloy wire 24, the through hole 23 needs to be evenly distributed along the round plate one 21 and the round plate two 22, the alloy wire 24 is selected from super-elastic alloy such as nickel-titanium, and is passed through the corresponding through hole 23 of the round plate one 21 and the round plate two 22, adjustable anchors such as wedge-shaped anchors or threaded sleeves are installed at both ends of the alloy wire 24, a pre-tension is applied by adjusting the anchor, the alloy wire 24 is energy-dissipated by phase change in the stretching and rebounding cycle, the pre-tension can improve the initial stiffness and delay plastic deformation, thereby enhancing the fatigue life, the number of through holes 23 is dynamically adjusted according to the pre-tension demand, for example, the through hole 23 is increased when the pre-tension is increased, the hole diameter needs to be slightly larger than the diameter of the alloy wire 24 so as to be installed, while ensuring that the friction force of the contact surface effectively transmits the load, when the outer cylinder 1 moves away from the pressure rod 11, the alloy wire 24 is stretched and energy is dissipated by using the super-elastic property thereof, the pre-tension of the alloy wire 24 can enhance the fatigue resistance and prolong the service life.

[0026] Further, the damping member 3 includes a disc 31 arranged on the other side of the pressure rod 11, a viscoelastic material layer 32 arranged on the inner wall of the outer cylinder 1, a guide rod 33 arranged on the inner wall of the outer cylinder 1, a sliding block 34 arranged on the other side of the sliding block 34 and the inner wall of the outer cylinder 1, and a spring 35 arranged between the sliding block 34 and the inner wall of the outer cylinder 1.

[0027] Wherein, referring to Figure 2 , the damping member 3 includes the viscoelastic material layer 32, the viscoelastic material layer 32 is vulcanized on the inner wall of the outer cylinder 1, the inner side is a slope, and presents a trapezoidal cross section, the inner side slope is in contact with the disc 31 of the pressure rod 11, forming a gradually changing compression and shear composite deformation zone, and sliding friction with the disc 31 of the pressure rod 11, converting mechanical energy into heat energy, the guide rod 33 is fixed on the inner wall of the outer cylinder 1, providing rigid guidance and limiting the sliding block 34 to move only in the axial direction, the spring 35 connects the sliding block 34 and the outer cylinder 1, and the sliding movement is constrained by the spring 35, when the power transmission line slightly vibrates, the sliding block 34 is driven by the spring 35 to move along the guide rod, and an inertial force opposite to the vibration is generated by the spring to offset the galloping energy, the guide rod 33 limits the movement track of the sliding block 34, so that the sliding block 34 only vibrates in the axial direction, a circular hole 36 is arranged at the middle position of the other side of the pressure rod 11, and the diameter of the circular hole 36 matches the outer diameter of the guide rod 33, that is, the guide rod 33 can freely slide in the circular hole 36.

[0028] Wherein, when the disc 31 extrudes the viscoelastic material layer 32, the disc 31 simultaneously slides through the circular hole 36 and the guide rod 33, the sliding friction between the viscoelastic material layer 32 and the disc 31 and the stretching of the shape memory alloy wire 24 form a composite energy-dissipating mechanism, and the extrusion of the disc 31 to the viscoelastic material 32 also has an energy-dissipating effect.

[0029] Further, referring to Figure 3The adjusting member is composed of the connecting rod 41 and the sleeve 4. The sleeve 4 is fixed on one side of the pressing rod 11 through flange screw connection, forms a rigid transition structure, is designed as a hollow inside, is used for accommodating the connecting rod 41, and transmits the vibration energy of the connecting rod 41 and the insulator 42 to the pressing rod 11. The sleeve 4 cooperates with the connecting rod 41, and the flexible adjustment of the overall length of the device is realized through the adjusting member 5.

[0030] In use, when the power transmission line has a small amplitude of dancing along the axial direction of the device, the mass slider 34 connected by the internal spring 35 generates a movement opposite to the dancing direction, provides an acting force opposite to the movement direction of the power transmission line, generates the TMD effect, and inhibits the dancing amplitude of the power transmission line. When the power transmission line has a large amplitude of dancing, the outer cylinder 1 and the pressing rod 11 in the damping member 3 start to have a relative displacement. When the outer cylinder 1 and the pressing rod 11 move towards each other, the shape memory alloy wire 24 starts to stretch, and provides a damping force. When the outer cylinder 1 and the pressing rod 11 move away from each other, the end circular table of the pressing rod 11 slides relative to the viscoelastic material layer 32, and extrudes the viscoelastic material layer 32, and provides a damping force. In the relative movement process of the outer cylinder 1 and the pressing rod 11, the energy of the power transmission line dancing is dissipated through the stretching of the shape memory alloy wire 24, the friction and extrusion of the viscoelastic material layer 32, thereby reducing the dancing of the power transmission line, controlling the safety clearance of the phase line, and improving the safety of the power transmission line.

[0031] Further, the sleeve 4 is connected to one side of the pressing rod 11 through flange screw connection. The connecting rod 41 is arranged on the sleeve 4. The insulator 42 is arranged on the connecting rod 41. The adjusting member 5 is arranged in the sleeve 4 and cooperates with the connecting rod.

[0032] The outer diameter of the connecting rod 41 is slightly smaller than the inner diameter of the sleeve 4. One end of the connecting rod 41 is connected to the insulator 42. The other end of the connecting rod 41 is inserted into the sleeve 4. The connecting rod 41 changes the overall length of the device through axial movement, and adapts to the installation spacing requirements of different power transmission lines. The connecting holes 51 are arranged on the outer walls of the sleeve 4 and the connecting rod 41, and are arranged perpendicular to the axial direction. The relative positions of the connecting rod 41 and the sleeve 4 are fixed by selecting different connecting holes 51. The high-strength bolts 52 pass through the connecting holes 51, and cooperate with the lock nuts to fix the relative positions of the connecting rod 41 and the sleeve 4, so that no slippage occurs in the vibration process, and the on-site adjustment or replacement of parts is facilitated.

[0033] As an optional embodiment, a multi-alloy wire 24 pre-tension adjustable anchor is provided, which is suitable for the area with large dancing amplitude and high frequency in the high-voltage power transmission line. The anchor 2 adopts a plurality of nickel-titanium alloy wires 24, such as 8-12 wires. The alloy wires 24 are uniformly distributed in a ring shape through the through holes 23 on the circular plate one 21 and the circular plate two 22. Each alloy wire 24 is independently installed in the adjustable anchor, such as a threaded sleeve 4.

[0034] The advantage of this arrangement is that the pre-tension can be dynamically adjusted by tightening the bolts to adapt to different galloping intensity requirements, and the alloy wires 24 are connected in parallel to increase the overall damping force and fatigue life.

[0035] As an optional embodiment, a single alloy wire 24 simplified anchorage is provided, which is suitable for low wind speed areas or short span transmission lines, only 1-2 thick diameter alloy wires 24 are used, the number of through holes 23 is small, and the anchor is a fixed wedge-shaped anchor.

[0036] The advantage of this arrangement is that the structure is simple and the cost is low, but the damping force generated by the extension of the alloy wire 24 is small.

[0037] Finally, it should be pointed out that the above detailed description of the method and equipment is only an embodiment, and those skilled in the art can modify the embodiment in different ways without departing from the scope of the present application.

Claims

1. A high-damping composite anti-vibration and damping device, characterized in that: include, Outer cylinder (1), pressure rod (11) disposed on one side of the outer cylinder (1); Anchor (2) is disposed between the outer cylinder (1) and the pressure bar (11); Damping element (3), which is disposed inside the outer cylinder (1) and cooperates with the pressure rod (11); When the outer cylinder (1) and the pressure rod (11) move in opposite directions, the anchor (2) generates damping force through stretching. When the outer cylinder (1) and the pressure rod (11) move towards each other, the damping element (3) generates damping force through friction and compression, thereby dissipating the energy of the transmission line galloping and reducing the galloping of the transmission line.

2. The high-damping composite anti-vibration and damping device according to claim 1, characterized in that: The anchor (2) includes a circular plate (21) disposed outside the pressure rod (11) and a circular plate (22) disposed at the other end of the outer cylinder (1). The circular plate (21) and the circular plate (22) are provided with a plurality of through holes (23) evenly in the radial direction, and alloy wires (24) are connected in the through holes (23) on both sides.

3. The high-damping composite anti-vibration and damping device according to claim 1, characterized in that: The damping element (3) includes a disc (31) disposed on the other side of the pressure rod (11) and a viscoelastic material layer (32) disposed on the inner wall of the outer cylinder (1).

4. The high-damping composite anti-galloping vibration reduction device according to claim 3, characterized in that: The inner side of the viscoelastic material layer (32) is provided as a slope extending from the outside to the inside, and the axial cross section of both the viscoelastic material layer (32) and the disk (31) is trapezoidal.

5. The high-damping composite anti-galloping vibration reduction device according to claim 4, characterized in that: A guide rod (33) is provided on the inner wall of the outer cylinder (1), and a slider (34) is sleeved on the outside of the guide rod (33) near the other end. A spring (35) is provided between the other side of the slider (34) and the inner wall of the outer cylinder (1).

6. The high-damping composite anti-galloping vibration reduction device according to claim 5, characterized in that: A through hole is provided in the middle of the slider (34), and the guide rod (33) passes through the through hole in the middle of the slider (34); The slider (34) is connected to the right circular plate (21) of the outer cylinder (1) by a spring (35).

7. The high-damping composite anti-galloping vibration reduction device according to claim 6, characterized in that: One end of the pressure rod (11) is provided with a disc (31), which is in the shape of a frustum and has a circular hole (36) in the middle. The guide rod (33) extends into the circular hole (36) to ensure that the pressure rod (11) and the outer cylinder (1) maintain the same axis of motion.

8. The high-damping composite anti-galloping vibration reduction device according to claim 1, characterized in that: It also includes a sleeve (4), which is connected to one side of the pressure rod (11) by a flange thread, a connecting rod (41) provided on the sleeve (4), and an insulator (42) provided on the connecting rod (41).

9. A high-damping composite anti-galloping vibration reduction device according to claim 8, characterized in that: It also includes an adjusting component (5), which is disposed inside the sleeve (4) and cooperates with the connecting rod (41). The adjusting component (5) includes a plurality of connecting holes (51) disposed outside the connecting rod (41) and the sleeve (4), and fastening bolts (52) are movably connected in the connecting holes (51).

10. A high-damping composite anti-galloping vibration reduction device according to claim 9, characterized in that: The outer diameter of the connecting rod (41) is slightly smaller than the inner diameter of the sleeve (4).

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