Anti-galloping device
By using a viscous fluid and friction structure with damping components in the anti-galling device, the mechanical energy of the conductor swaying is consumed, solving the problem of insufficient energy dissipation of existing anti-galling spacers and achieving a better conductor galloping suppression effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 湖南三一智慧新能源设计有限公司
- Filing Date
- 2025-05-14
- Publication Date
- 2026-05-19
AI Technical Summary
Existing anti-fighting spacers rely on structural rigidity and cannot effectively dissipate the vibration energy of the conductors, resulting in limited anti-fighting effects.
By employing damping components, the mechanical energy of the conductor's swaying is consumed through the friction between the viscous fluid and the friction components. Energy is consumed through fluid friction, thereby increasing the contact area between the fluid and the friction components and the relative motion friction resistance.
It effectively reduces the amplitude of conductor galloping and improves the anti-galloping effect. Compared with rigid connection anti-galloping spacers, it has better energy dissipation capability.
Smart Images
Figure CN224264652U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power transmission line protection technology, and in particular to an anti-galling device. Background Technology
[0002] During the operation of high-voltage transmission lines, conductors are prone to low-frequency, large-amplitude galloping under environmental excitations such as wind loads and icing. This galloping not only leads to fatigue damage to the conductors and fittings, but may also cause serious accidents such as phase-to-phase flashover and line tripping, posing a significant threat to the safe and stable operation of the power grid.
[0003] To address the issue of conductor galloping, anti-galloping spacers are currently the primary method of suppression. These devices use a rigid connection structure to constrain multiple conductors, employing mechanical limiting to suppress relative displacement. Existing anti-galloping spacers typically utilize a metal frame structure, achieving rigid constraint on the conductors through mechanical connections, thereby dispersing galloping energy.
[0004] However, existing anti-galloping spacers mainly rely on structural rigidity to restrict conductor movement, resulting in insufficient energy dissipation. During continuous conductor galloping, the device cannot effectively dissipate vibration energy, leading to limited anti-galloping effectiveness. Utility Model Content
[0005] This utility model provides an anti-galling device to solve the defect of existing anti-galling spacers that cannot effectively consume vibration energy, thereby realizing an anti-galling device that can effectively consume vibration energy and improving the anti-galling effect.
[0006] This utility model provides an anti-galling device, including an anti-galling component, wherein the anti-galling component includes:
[0007] Damping component, the damping component comprising:
[0008] The housing has a sealed cavity inside, and the sealed cavity contains a viscous fluid;
[0009] A friction element is disposed inside the sealed cavity. When the anti-shaking assembly is shaking, the viscous fluid rubs against the friction element to consume the mechanical energy generated by the shaking.
[0010] A first connecting component is disposed at one end of the housing and is used to fix one end of the damping component;
[0011] The second connecting component is located at the other end of the housing and is used to fix the other end of the anti-galling component.
[0012] According to the present invention, the anti-galling device has a spiral structure and is rotatably disposed in the sealing cavity.
[0013] According to the present invention, one end of the friction element is connected to one end of the sealing cavity, and the other end of the friction element is connected to the other end of the sealing cavity.
[0014] According to the present invention, an anti-galling device is provided, wherein two friction elements are provided, the two friction elements are respectively located at both ends of the sealing cavity, and a gap is provided between the two friction elements.
[0015] According to the present invention, an anti-galling device is provided in which multiple layers of damping grids are provided between the gaps.
[0016] According to the present invention, the surface of the friction element is provided with grooves or protrusions.
[0017] According to the present invention, an anti-galling device is provided in which a plurality of damping rings are provided at intervals on the inner wall of the housing, the damping rings are provided with a plurality of damping holes, and the friction element passes through the damping rings.
[0018] According to the present invention, an anti-galling device is provided, wherein at least two anti-galling components are provided, and the two anti-galling components are symmetrically arranged.
[0019] According to the anti-galling device provided by this utility model, the first connecting component includes:
[0020] The first connector is connected at one end to the first end of the housing;
[0021] A wire clamp is located at the other end of the first connector and is used to fix the wire.
[0022] According to the anti-galling device provided by this utility model, the second connecting component includes:
[0023] The second connector is connected at one end to the second end of the housing;
[0024] An equalizing ring is located at the other end of the second connector;
[0025] An insulator is located on the side of the equalizing ring away from the second connector.
[0026] The anti-galloping device provided by this utility model, when the conductor gallops under wind load, the anti-galloping component moves synchronously with the conductor, causing the viscous fluid inside the housing to flow. The relative motion between the viscous fluid and the friction components generates frictional resistance, converting the conductor's mechanical energy into heat energy for dissipation. The sealed cavity of the housing restricts the flow path of the viscous fluid and increases the contact area between the fluid and the friction components. The first and second connecting components transmit the damping force of the damping component to the conductor, suppressing the relative displacement of the conductor. This structure dissipates energy through fluid friction, offering better energy dissipation than rigidly connected anti-galloping spacers, effectively reducing the amplitude of conductor galloping. Attached Figure Description
[0027] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0028] Figure 1 This is a structural schematic diagram of the anti-galling device provided by this utility model;
[0029] Figure 2 This is one of the actual application assembly drawings of the anti-galling device provided by this utility model;
[0030] Figure 3 This is the second assembly drawing of the actual application of the anti-galling device provided by this utility model.
[0031] Figure label:
[0032] 100: Anti-galling component; 110: Damping component; 111: Housing; 112: Friction component; 120: First connecting component; 121: First connector; 122: Wire clamp; 130: Second connecting component; 131: Second connector; 132: Equalizing ring; 133: Insulator;
[0033] 200: Wire. Detailed Implementation
[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0035] The following is combined Figures 1-3 Describe the structure and working principle of this utility model.
[0036] Reference Figure 1 The present invention provides an anti-galling device comprising an anti-galling component 100, which is used to prevent the conductor 200 from swaying. The anti-galling component 100 includes a damping component 110, a first connecting component 120, and a second connecting component 130. The damping component 110 includes a housing 111 and a friction element 112. The housing 111 has a sealed cavity containing a viscous fluid. The friction element 112 is located inside the sealed cavity. When the anti-galling component 100 sways, the viscous fluid rubs against the friction element 112 to dissipate the mechanical energy generated by the swaying. The first connecting component 120 is located at one end of the housing 111 and is used to fix one end of the damping component 110. The second connecting component 130 is located at the other end of the housing 111 and is used to fix the other end of the anti-galling component 100.
[0037] Specifically, the first connecting component 120 and the second connecting component 130 can be fixed to the wire 200 by bolt connection. The first connecting component 120 may have a first mounting hole, and the second connecting component 130 may have a second mounting hole. The wire 200 is aligned with the first mounting hole and the second mounting hole by a clamp and then fastened with bolts. The housing 111 and the first connecting component 120 can be fixed by welding, and a flange can be provided between the housing 111 and the second connecting component 130 and connected by bolts.
[0038] When the conductor 200 gallops under wind load, the anti-galloping component 100 moves synchronously with the conductor 200, causing the viscous fluid inside the housing 111 to flow. The relative motion between the viscous fluid and the friction element 112 generates frictional resistance, converting the conductor's mechanical energy into heat energy for dissipation. The sealed cavity of the housing 111 restricts the flow path of the viscous fluid, increasing the contact area between the fluid and the friction element 112. The first connecting component 120 and the second connecting component 130 transmit the damping force of the damping component 110 to the conductor 200, suppressing the relative displacement of the conductor. This structure dissipates energy through fluid friction, offering better energy dissipation than rigidly connected anti-galloping spacers, effectively reducing the amplitude of conductor galloping.
[0039] In other possible embodiments, the viscous fluid can be a high-viscosity silicone oil with a viscosity coefficient adjustable in the range of 1000-10000 cSt and stable temperature characteristics. Methyl silicone oil or phenyl silicone oil can meet the operating temperature requirements from -40°C to 150°C. For applications requiring higher damping effects, polyalphaolefin synthetic oils with a viscosity index exceeding 150 and good viscosity retention at high temperatures can be used. For low-temperature environments, ethylene glycol-based hydraulic oils can be selected, with a pour point down to -60°C. In areas with strict fire protection requirements, phosphate ester flame-retardant hydraulic oils with a flash point above 300°C can be used.
[0040] For applications requiring both lubrication and damping, lithium-based greases can serve as an alternative to viscous fluids, with an NLGI rating between 2 and 3. In highly corrosive environments, perfluoropolyether oils exhibit excellent chemical inertness and can withstand strong acids and alkalis. When equipment requires long maintenance intervals, polyisobutylene synthetic oils can guarantee a service life of over 5 years. For applications with stringent environmental requirements, vegetable oil-based biodegradable hydraulic oils with a biodegradability exceeding 80% can be selected.
[0041] The housing 111 can be made of high-strength, corrosion-resistant materials, such as aluminum alloy or stainless steel, to ensure long-term stable operation of the device in harsh natural environments. The sealing cavity is located inside the housing 111, and a special sealing process ensures the cavity's airtightness to prevent leakage of viscous fluids.
[0042] In some possible embodiments, the housing 111 may have multiple interconnected sealed cavities, each containing an independent friction element 112. Through holes are provided on the partitions between adjacent sealed cavities, allowing viscous fluid to flow between the cavities. The friction element 112 may have a corrugated surface to increase the contact area with the viscous fluid. Heat dissipation fins may be provided on the exterior of the housing 111, uniformly distributed along the axial direction of the housing 111. The first connecting component 120 may have a universal joint structure, with its output end fixed to the housing 111. The second connecting component 130 may have an elastic buffer layer made of rubber and covering the outside of the conductor 200. This structure improves energy dissipation efficiency through a multi-cavity design, enhances fluid turbulence with the corrugated friction element 112, ensures stability during long-term operation with the heat dissipation fins, and reduces stress concentration at the connection points with the universal joint structure and elastic buffer layer.
[0043] Reference Figure 1 In some embodiments of this utility model, the friction element 112 has a helical structure and is rotatably disposed within the sealed cavity. Specifically, the two ends of the rotating shaft of the friction element 112 can be supported by double-row angular contact ball bearings, and the outer ring of the bearing is fixed to the bearing seat of the housing 111 by an transition fit.
[0044] When the conductor 200 gallops, the anti-galloping component 100 drives the housing 111 to move, and the viscous fluid in the sealed cavity pushes the helical friction element 112 to rotate. A viscous shear force is generated between the helical blades of the friction element 112 and the fluid, and the rotating friction element 112 simultaneously forms eddies in the fluid, enhancing energy dissipation. The bearings at both ends of the shaft reduce rotational resistance, allowing the friction element 112 to respond more sensitively to fluid movement.
[0045] In some possible embodiments, the helical blades of the friction element 112 may have a gradually decreasing pitch design, with a larger pitch near the middle of the shaft and a gradually decreasing pitch at both ends. The inner wall of the housing 111 may have axial flow-guiding ribs with a streamlined cross-section. A buffer chamber may be provided at the end of the sealing cavity, with a throttling orifice between the buffer chamber and the main cavity. The shaft of the friction element 112 may have an inertia flywheel, which is fixed to the middle of the shaft via a key connection. The outer surface of the housing 111 may have an axial heat dissipation channel, with reinforced heat transfer fins on the inner wall of the channel.
[0046] Reference Figure 1 In some embodiments of this utility model, one end of the friction member 112 is connected to one end of the sealing cavity, and the other end of the friction member 112 is connected to the other end of the sealing cavity.
[0047] Reference Figure 1 In some embodiments of this utility model, two friction elements 112 are provided, the two friction elements 112 are respectively located at both ends of the sealing cavity, and a gap is provided between the two friction elements 112.
[0048] When the conductor 200 gallops, the anti-galloping component 100 drives the sealed cavity to move, and the two friction elements 112 generate a phase difference in motion within the viscous fluid. Due to the gap between the two friction elements 112, turbulence is created in the gap, enhancing energy dissipation. This structure, through its double friction element 112 design, expands the fluid friction area, and the turbulence effect generated by the gap further improves energy conversion efficiency, resulting in better anti-galloping performance compared to a single friction element structure.
[0049] In some possible embodiments, the two friction elements 112 may have interlocking toothed structures with an involute profile. A flow guide baffle may be provided in the middle of the sealing cavity, with staggered flow guide holes on the baffle.
[0050] Reference Figure 1 In some embodiments of this utility model, a multi-layer damping grid (not shown in the figure) is provided between the gaps between the two friction members 112.
[0051] Specifically, the damping grid is fixedly connected to the inner wall of the sealing cavity using continuous fillet welds. Before welding, the edges of the damping grid are machined with a single-sided V-shaped bevel at an angle of 45°, which fits tightly against the pre-positioned boss on the inner wall of the sealing cavity. Inert gas shielded welding is used during welding, and the welding wire material is compatible with the substrate of the housing 111. For large anti-galloping components 100, the damping grid can be welded in sections. After each grid unit is fixed by a positioning fixture, it is first positioned by intermittent spot welding, and then the continuous weld is completed. The weld surface is ground smooth to ensure that it does not affect the fluid flow characteristics. After welding, the weld area is subjected to penetrant testing to ensure that there are no defects such as cracks or porosity.
[0052] When the two friction components 112 move relative to each other, the viscous fluid flows through the welded and fixed damping grid. The welded connection ensures a rigid connection between the damping grid and the inner wall of the sealed cavity, avoiding relative displacement at the connection point. As the fluid passes through the damping grid, it experiences multiple resistances from the grid surface and the welded connection; kinetic energy is converted into heat energy through viscous friction and eddy current dissipation. The welded structure offers good overall integrity, making the transmission of damping force more direct and effective, while eliminating the risk of loosening that may occur with bolted connections. This fixed connection method allows the damping grid to maintain its designed flow channel shape over a long period, ensuring stable damping performance.
[0053] In some possible embodiments, the welded damping grid can employ a variable thickness design, with the thickness of the grid unit in the center being greater than that at the edges to enhance structural stiffness. Stress buffer grooves can be provided in the welding area, located outside the heat-affected zone of the weld, to release residual welding stress. The flow-facing surface of the damping grid can be machined with a guiding curved surface, the curvature of which adapts to the direction of the main fluid flow. Copper heat sinks can be pre-installed on the inner wall of the sealed cavity in the welding area to control welding heat input. The surface of the welded damping grid can be shot-peened to create compressive stress on the surface to improve fatigue life. This structure, through optimized welding processes and detailed design, further enhances connection reliability and long-term performance.
[0054] Reference Figure 1 In some embodiments of this utility model, the surface of the friction member 112 is provided with grooves or protrusions (not shown in the figure).
[0055] Specifically, the grooves or protrusions on the surface of the friction component 112 can be manufactured using an integral machining process. The body material of the friction component 112 is directly machined with the designed surface texture using CNC milling technology, ensuring the integrity of the texture and the base material. For large friction components 112, the surface structure can adopt a split design, with the texture units fixed to the base material by laser welding, and the welding trajectory arranged along the texture direction.
[0056] When the friction component 112 moves in a viscous fluid, surface grooves or protrusions alter the fluid's flow state. Grooves guide the fluid to generate directional eddies, increasing the contact area and contact time between the fluid and the solid surface. Protrusions generate periodic disturbances in the fluid, disrupting the stable development of the boundary layer. This surface texture allows fluid kinetic energy to be converted into heat energy through more complex viscous shearing and turbulent mixing. Compared to smooth surfaces, textured designs significantly increase the equivalent friction area and improve energy dissipation efficiency per unit volume. Simultaneously, specific texture orientations can control the fluid flow direction, avoiding undesirable flow separation phenomena.
[0057] Reference Figure 1 In some embodiments of this utility model, the inner wall of the housing 111 is provided with a plurality of damping rings (not shown in the figure) spaced apart, and the damping rings are provided with a plurality of damping holes, through which the friction member 112 passes. It is understood that the outer diameter of the friction member 112 is smaller than the inner diameter of the damping ring, that is, the damping rings are provided so as not to hinder the rotation of the friction member 112.
[0058] Specifically, the damping ring can be fixed to the inner wall of the housing 111 using a heat-shrink fitting method. During installation, the housing 111 is locally heated to expand it, and the damping ring is inserted into the predetermined position in a cold state. After cooling, an interference fit is formed. For applications requiring detachability, the damping ring can be designed as a split structure, with two halves connected by high-strength bolts, and the mating surface positioned using a trapezoidal groove. In schemes requiring position adjustment, the damping ring can have an axial sliding groove that mates with a guide key on the inner wall of the housing 111, and the final position is fixed by a set screw. The end face of the damping ring can be machined with an annular groove, within which a sealing ring is placed to prevent fluid leakage from the mating surface.
[0059] Specifically, the damping orifice can be designed as a Venturi-shaped orifice, with a tapered transition at the inlet and a widening curve at the outlet. The orifice profile can be fitted using a cubic spline function to ensure the flow separation point is controlled at a specific location. For applications requiring enhanced turbulence, the damping orifice can be designed as a multi-stage stepped orifice, with rounded transitions between each stage. In schemes requiring control of the flow direction, the damping orifice can be machined into a beveled cylindrical shape, with the orifice axis forming a specific angle with the radial direction of the damping ring. The orifice edge can be rounded, with the fillet radius proportional to the orifice diameter, to reduce flow losses.
[0060] When viscous fluids pass through specially designed damping orifices, the geometry of the orifice directly affects flow separation and energy dissipation efficiency. Venturi orifices maintain boundary layer development through smooth cross-sectional changes, preventing premature flow separation. Stepped orifices generate stable vortex regions at abrupt changes in cross-section, enhancing energy dissipation. Beveled orifices guide the fluid to generate a circumferential velocity component, forming a three-dimensional helical flow. These optimized orifice designs enable more complex flow patterns as the fluid passes through the damping ring, converting kinetic energy into thermal energy more efficiently through viscous shear and turbulent mixing. Compared to ordinary straight orifices, special orifice designs can achieve greater energy dissipation at the same pressure drop.
[0061] Reference Figures 1 to 3 In some embodiments of this utility model, at least two anti-galling components 100 are provided, and the two anti-galling components 100 are symmetrically arranged. Specifically, the two anti-galling components 100 can adopt a coaxial symmetrical installation scheme. The two anti-galling components 100 are fixed by a through-type connecting shaft, and the two ends of the connecting shaft are pre-tightened with lock nuts.
[0062] When conductor 200 gallops, the symmetrically arranged anti-galloping components 100 operate simultaneously, creating a synergistic damping effect. The phase difference in the movement of the two anti-galloping components 100 generates complementary damping force fields, effectively suppressing the multi-directional vibration of conductor 200. The symmetrical arrangement makes the damping force distribution more balanced, avoiding the torsion of conductor 200 that might be caused by unilateral damping. The synergistic effect of the two anti-galloping components 100 expands the energy dissipation area, allowing the vibration energy of conductor 200 to attenuate in a shorter time.
[0063] Reference Figure 1 In some embodiments of this utility model, the first connecting component 120 includes a first connecting member 121 and a wire clamp 122. One end of the first connecting member 121 is connected to the outside of the first end of the housing 111 by a bolt. The wire clamp 122 is connected to the other end of the first connecting member 121 by a bolt. The wire clamp 122 is used to fix the wire 200. The wire clamp 122 needs to be compatible with the wire 200 and only needs to be able to be firmly connected to the wire 200.
[0064] The second connecting component 130 includes a second connecting member 131, an equalizing ring 132, and an insulator 133. One end of the second connecting member 131 is fixedly connected to the exterior of the second end of the housing 111 by bolts; the equalizing ring 132 is fixedly disposed at the other end of the second connecting member 131; and the insulator 133 is fixedly disposed on the side of the equalizing ring 132 away from the second connecting member 131. It should be noted that the first end of the housing 111 can refer to... Figure 1 The middle left end, the second end of the housing 111 can refer to Figure 1 Right middle end.
[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. An anti-galloping device, characterized in that, Includes an anti-galling component, the anti-galling component comprising: Damping component, the damping component comprising: The housing has a sealed cavity inside, and the sealed cavity contains a viscous fluid; A friction element is disposed inside the sealed cavity. When the anti-shaking assembly is shaking, the viscous fluid rubs against the friction element to consume the mechanical energy generated by the shaking. A first connecting component is disposed at one end of the housing and is used to fix one end of the damping component; The second connecting component is located at the other end of the housing and is used to fix the other end of the anti-galling component.
2. The anti-galloping device according to claim 1, characterized in that, The friction element has a helical structure and is rotatably disposed within the sealing cavity.
3. The anti-galloping device according to claim 2, characterized in that, One end of the friction element is connected to one end of the sealing cavity, and the other end of the friction element is connected to the other end of the sealing cavity.
4. The anti-galloping device according to claim 2, characterized in that, The friction element is provided in two parts, which are located at the two ends of the sealing cavity respectively, and a gap is provided between the two friction elements.
5. The anti-galloping device according to claim 4, characterized in that, The gaps are provided with multiple layers of damping grids.
6. The anti-galloping device according to any one of claims 1-5, characterized in that, The surface of the friction element is provided with grooves or protrusions.
7. The anti-galloping device according to claim 6, characterized in that, The inner wall of the housing is provided with multiple damping rings spaced apart, and each damping ring is provided with multiple damping holes. The friction element passes through the damping rings.
8. The anti-galloping device according to claim 1, characterized in that, The anti-galloping component is provided in at least two parts, and the two anti-galloping components are arranged symmetrically.
9. The anti-galloping device according to claim 8, characterized in that, The first connecting component includes: The first connector is connected at one end to the first end of the housing; A wire clamp is located at the other end of the first connector and is used to fix the wire.
10. The anti-galloping device according to claim 9, characterized in that, The second connecting component includes: The second connector is connected at one end to the second end of the housing; An equalizing ring is located at the other end of the second connector; An insulator is located on the side of the equalizing ring away from the second connector.