CN221054202U - Overhead line vibration suppression device based on TMD and electromagnetic combined damping - Google Patents
Overhead line vibration suppression device based on TMD and electromagnetic combined damping Download PDFInfo
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- CN221054202U CN221054202U CN202322748399.9U CN202322748399U CN221054202U CN 221054202 U CN221054202 U CN 221054202U CN 202322748399 U CN202322748399 U CN 202322748399U CN 221054202 U CN221054202 U CN 221054202U
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- 230000001629 suppression Effects 0.000 title claims abstract description 18
- 125000006850 spacer group Chemical group 0.000 claims abstract description 36
- 239000004020 conductor Substances 0.000 claims description 54
- 230000006698 induction Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 230000005484 gravity Effects 0.000 abstract description 10
- 230000007774 longterm Effects 0.000 abstract description 6
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
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- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
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- 230000007547 defect Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
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- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model provides an overhead line vibration suppression device based on TMD and electromagnetic combined damping, which comprises a spacer, a connecting frame, an electromagnetic damper and a TMD damper, wherein the spacer is arranged on the connecting frame; the spacing rod is clamped on the overhead line, and the connecting frame is connected with the electromagnetic damper and the spacing rod; the TMD damper is connected below the spacer; the device adopts the electromagnetic damper to improve damping effect to resist torsional vibration, has small friction and abrasion and long service life, and can be suitable for long-term operation in field severe environments; meanwhile, the TMD damper generates eccentric torque by self gravity, so that simple torsion can be restrained, tuned mass damping can be generated by the TMD damper, and vertical vibration of an overhead line can be resisted, so that the two purposes are achieved.
Description
Technical Field
The utility model belongs to the technical field of overhead line vibration suppression, and particularly relates to an overhead line vibration suppression device based on TMD and electromagnetic combined damping.
Background
Overhead transmission lines operating in cold areas or winter are erected, and ice coating can be generated under proper meteorological conditions, so that ice-removing jumping or galloping occurs. The ice-removing jump is a phenomenon that when the air temperature rises, the ice coating on the wire or the ground wire loosens, and under the combined action of wind power and ice coating gravity, the ice coating falls off, so that the ice coating load of the wire is suddenly unloaded, and the wire is greatly jumped and vibrated. The insulator string, the hardware fitting, the iron tower and the like can be subjected to impact load due to large vibration during deicing jump, and accidents such as insulator breakage, hardware fitting damage or transmission tower cross arm deformation, even tower falling and the like can be caused when the insulator string, the hardware fitting, the iron tower and the like are serious. The galloping is large-amplitude and low-frequency self-oscillation generated under the action of wind load after irregular icing is generated on a power transmission wire or a ground wire, and the damage and the electrical faults of a power transmission line structure can be caused. For the multi-split conductor, when ice-removing jump or galloping occurs, not only vertical vibration of the conductor bundle is caused, but also large torsional vibration of the conductor bundle is caused, the vertical large vibration can cause insufficient electrical safety distances among the conductors, between the conductors and the ground, and between the conductors and the ground, so that accidents such as interphase flashover and tripping are caused, and the torsional vibration can cause twisting collision of sub-conductors and damage of the conductors.
At present, related documents propose a scheme for inhibiting wire ice-breaking jump and galloping by installing phase spacers, but the conventional phase spacers mainly inhibit the ice-breaking jump and galloping by mutually rigid drag between different phase wires, and mainly solve the following problems:
1) The lack of energy dissipation effect makes it difficult to quickly subside the vibration;
2) When a large amount of ice is suddenly removed, the wire instantaneously vibrates greatly, so that a strong impact effect can be generated on the spacer rod body and the hardware fitting at the joint of the spacer rod and the wire, and the spacer rod is broken or the hardware fitting is broken.
Other types of wire de-icing jump or galloping suppression devices have also been proposed by the relevant scholars, such as "a multi-split wire bundle de-icing flip control device (201910074262. X)", but the main problems are:
1) Damping performance mainly depends on friction of parts or viscous liquid, and risks of abrasion and leakage exist in long-term use;
2) It is difficult to suppress static twisting and torsional vibration caused by uneven icing and asynchronous deicing, and problems of vertical and torsional coupling vibration of the multi-split conductor caused by deicing jump or galloping.
Therefore, there is a need to develop a device that can generate a significant damping effect, can suppress static twisting and torsional vibration caused by uneven icing and asynchronous deicing, and has a significant suppressing effect on vertical and torsional coupling vibration of a multi-split wire caused by deicing skip or galloping, so as to avoid damage to a circuit structure caused by deicing or galloping large-scale vibration.
Disclosure of utility model
In order to overcome the defects in the prior art, the utility model provides an overhead line vibration suppression device based on TMD and electromagnetic combined damping, which comprises: spacer bars 12, connectors, electromagnetic dampers, and TMD dampers;
the spacing rod 12 is clamped on the overhead line, and the connecting frame is connected with the electromagnetic damper and the spacing rod 12;
the TMD damper is connected below the spacer 12.
Preferably, the TMD damper includes a housing 10, and a first spring 7, a mass block 8 and a second spring 9 which are all disposed in the housing 10 and are sequentially connected, the housing 10 is fixedly connected below the spacer 12, the top of the first spring 7 is abutted to the inner side of the top of the housing 10, and the bottom of the second spring 9 is abutted to the inner side of the bottom of the housing 10.
Preferably, the electromagnetic damper comprises a permanent magnet assembly, a conductor disc 2 for cutting magnetic induction lines, a pendulum connecting rod 5, a pendulum 6 and a disc shaft 4; the disc shaft 4 is arranged on the connecting frame in a penetrating way and is connected with the connecting frame in a rotating way, the conductor disc 2 is vertically arranged, the center of the conductor disc 2 is fixedly connected with one end of the disc shaft 4, the upper end of the pendulum connecting rod 5 is fixedly connected with the other end of the disc shaft 4, and the lower end of the pendulum connecting rod is connected with the pendulum 6.
Preferably, the permanent magnet assembly comprises a plurality of permanent magnets 1, the plurality of permanent magnets 1 are arranged in pairs, the plurality of pairs of permanent magnets 1 are annularly distributed around the center of the conductor disc 2, two permanent magnets 1 of each pair are respectively arranged at the left side and the right side of the conductor disc 2 and are distributed with the conductor disc 2 at equal intervals, and the permanent magnets 1 are arranged on the connecting frame.
Preferably, the pendulum connecting rod 5 is provided with a plurality of adjustable mounting holes 11 along the length direction thereof for rotationally connecting the disc shaft 4.
Preferably, the connecting frame comprises two parallel cover plates 3 which are distributed at intervals, the two cover plates 3 are fixed on the spacing bars 12, the conductor disc 2 is positioned in the interval between the two cover plates 3, and the permanent magnet assembly is arranged on the cover plates 3.
Preferably, the cover plate 3 and the spacer 12 are fixed by any one of the following methods:
welding and bolting.
Preferably, two cover plates 3 are respectively arranged at two sides of the middle cavity of the spacer 12, and the conductor disc 2 is positioned in the middle cavity of the spacer 12.
Preferably, the conductor disk 2 is arranged coaxially with the spacer 12.
Based on the same inventive concept, the utility model also provides an overhead line vibration suppression method based on TMD and electromagnetic combined damping, which comprises the following steps:
when the overhead line twists, an eccentric torque is formed by the gravity of the TMD damper below the spacer 12 to resist the twisting;
When the overhead line twists and vibrates, an electromagnetic damping function is realized through an electromagnetic damper, and the twisting and vibration of the overhead line is restrained;
When the overhead line vertically vibrates up and down, the TMD damper realizes a tuned mass damping function and suppresses the vertical vibration of the overhead line.
Compared with the closest prior art, the utility model has the following beneficial effects:
The utility model adopts a spacing rod 12, a connecting frame, an electromagnetic damper and a TMD damper; the spacing rod 12 is clamped on the overhead line, and the connecting frame is connected with the electromagnetic damper and the spacing rod 12; the TMD damper is connected below the spacer 12, and the electromagnetic damper is used for improving damping effect to resist torsional vibration, so that the whole device has small friction and wear and long service life, and can be suitable for long-term operation in a severe field environment; meanwhile, the TMD damper generates eccentric torque by self gravity, so that simple torsion can be restrained, tuned mass damping can be generated by the TMD damper, and vertical vibration of an overhead line can be resisted, so that the two purposes are achieved.
Drawings
Fig. 1 is a schematic structural diagram of an overhead line vibration suppression device based on TMD and electromagnetic combined damping;
FIG. 2 is a cross-sectional view A-A of the TMD damper of FIG. 1 with the TMD damper removed in accordance with the utility model;
FIG. 3 is a schematic view of a structure of a conductor disc according to the present utility model;
FIG. 4 is a top view of FIG. 3 in accordance with the present utility model;
Wherein, 1, permanent magnet; 2. a conductor disc; 3. a cover plate; 4. a disc shaft; 5. a pendulum connecting rod; 6. a pendulum; 7. a first spring; 8. a mass block; 9. a second spring; 10. a housing; 11. an adjustable mounting hole; 12. a spacer.
Detailed Description
The following describes the embodiments of the present utility model in further detail with reference to the drawings.
The utility model provides an overhead line vibration suppression device based on TMD (tuned mass damping ) and electromagnetic combined damping, which is shown in figures 1 and 2, and comprises a spacer 12, a connecting frame, an electromagnetic damper and a TMD damper;
the spacing rod 12 is clamped on the overhead line, and the connecting frame is connected with the electromagnetic damper and the spacing rod 12;
the TMD damper is connected below the spacer 12.
The TMD damper comprises a shell 10, and a first spring 7, a mass block 8 and a second spring 9 which are all arranged in the shell 10 and are sequentially connected, wherein the shell 10 is fixedly connected below the spacing rod 12, the top of the first spring 7 is abutted to the inner side of the top of the shell 10, and the bottom of the second spring 9 is abutted to the inner side of the bottom of the shell 10.
The electromagnetic damper comprises a permanent magnet assembly, a conductor disc 2 for cutting magnetic induction lines, a pendulum connecting rod 5, a pendulum 6 and a disc shaft 4; the disc shaft 4 is arranged on the connecting frame in a penetrating way and is connected with the connecting frame in a rotating way, the conductor disc 2 is vertically arranged, the center of the conductor disc 2 is fixedly connected with one end of the disc shaft 4, the upper end of the pendulum connecting rod 5 is fixedly connected with the other end of the disc shaft 4, and the lower end of the pendulum connecting rod is connected with the pendulum 6.
The permanent magnet assembly comprises a plurality of permanent magnets 1, the plurality of permanent magnets 1 are arranged in pairs, the plurality of pairs of permanent magnets 1 are distributed in a ring shape around the center of the conductor disc 2, two permanent magnets 1 of each pair are respectively arranged on the left side and the right side of the conductor disc 2 and are distributed with the conductor disc 2 at equal intervals, and the permanent magnets 1 are arranged on the connecting frame.
The pendulum connecting rod 5 is provided with a plurality of adjustable mounting holes 11 for the rotary connection of the disc shaft 4 along the length direction.
The utility model solves the problems that the prior power transmission line has limited damping performance of the phase-to-phase spacer used during the large-amplitude vibration suppression, has insufficient effect on the large-amplitude vibration suppression of the lead caused by the instantaneous mass de-icing and is easy to cause the damage of the phase-to-phase spacer; the performance of the existing damping device is mainly exerted by friction of components or viscous liquid, and the risks of abrasion and leakage exist in long-term use are avoided; solves the defect that the prior wire vibration suppression device is difficult to simultaneously generate the suppression effect on the vertical and torsional vibration of the multi-split wires.
The utility model provides a suppression device which comprehensively utilizes tuned mass damping and electromagnetic damping effects, can suppress static twisting and torsional vibration caused by uneven icing and asynchronous deicing, can simultaneously suppress vertical and torsional coupling large-amplitude vibration of a wire caused by deicing or galloping, and is mainly used for damping the generation of the tuned mass damping and the electromagnetic damping, the vertical vibration of the wire can be effectively suppressed by the tuned mass damping in the vertical direction, the torsional vibration of a multi-split wire bundle can be effectively suppressed by the electromagnetic damping in the torsional direction, the damping effect of the whole device is strong, the friction and the abrasion are small, and the suppression device is long in service life and can be suitable for long-term operation in a field severe environment. The mass block and the shell are positioned at the lower end of the spacing rod, so that reverse torque for inhibiting the torsion of the wire bundle can be provided, and the vertical and torsion large vibration of the wire caused by uneven icing, asynchronous deicing or galloping of the factor wire can be simultaneously inhibited; meanwhile, the damping is generated independently of friction or viscous liquid, abrasion and leakage risks are avoided, the service life is long, and the damping device can be suitable for long-term operation in a field severe environment.
The plurality of adjustable mounting holes 11 are used for adjusting the height of the pendulum bob 6 according to actual needs, so as to adjust the gravity center of the whole device.
The connecting frame comprises two parallel cover plates 3 which are distributed at intervals, the two cover plates 3 are fixed on the spacing bars 12, the conductor disc 2 is located in the interval between the two cover plates 3, and the permanent magnet assembly is arranged on the cover plates 3.
The spacer 12 is a standard hardware on overhead lines.
For a binary, tetrad, octad or other split number of conductors, the spacer 12 should match the split number of the corresponding conductor.
The cover plate 3 and the spacer 12 are fixed by any one of the following methods:
welding and bolting.
As shown in fig. 3 and 4, two cover plates 3 are respectively arranged at two sides of the middle cavity of the spacer 12, and the conductor disc 2 is positioned in the middle cavity of the spacer 12.
The hollow size in the middle of the spacer 12 is large, the conductor disc 2 with larger size can be installed, the larger the size of the conductor disc 2 is, the more obvious the damping effect is generated after the conductor disc rotates, and the better the use effect is.
The weight and the installation height of the pendulum bob 6 are adjusted along with the weight of the conductor disc 2, so that the gravity center of the whole device is positioned below the center of the spacing rod 12, and the lower the gravity center of the whole device is, the better the torsional vibration suppression effect is.
The conductor disk 2 is arranged coaxially with the spacer 12.
The utility model is used in practice:
s1, when an overhead line twists, forming an eccentric torque by the gravity of a TMD damper below a spacing rod 12, and resisting the twisting;
S2, when the overhead line twists and vibrates, an electromagnetic damping function is realized through an electromagnetic damper, and the twisting and vibration of the overhead line is restrained;
And S3, when the overhead line vertically vibrates up and down, the TMD damper realizes a tuned mass damping function and suppresses the vertical vibration of the overhead line.
The step S1 specifically comprises the following steps: when uneven icing is formed on different sub-conductors of the multi-split conductor bundle of the overhead line, asynchronous deicing or galloping occurs, and the conductor bundle is driven to twist, an eccentric torque is formed by the combination of the gravity of the first spring 7, the mass block 8, the second spring 9 and the shell 10 of the TMD damper, so that the twisting of the multi-split conductor bundle can be resisted.
The step S2 specifically comprises the following steps: when the overhead line torsional vibration, through pendulum 6 drive pendulum connecting rod 5 in the electromagnetic damper rotate, pendulum connecting rod 5 drives conductor disc 2 through disc axle 4 and rotates to the line is felt to magnetism that the permanent magnet subassembly produced on the conductor disc 2 rotatory cutting link to produce vortex and the electromagnetic moment opposite with the rotation direction in conductor disc 2, turn into the heat energy that the vortex generates heat with kinetic energy, realize the effect of electromagnetic damping torsional vibration, can reduce overhead line's torsional vibration intensity, make the vibration subside fast.
The step S3 specifically comprises the following steps: when the multi-split wire bundle vibrates up and down due to ice removal or galloping, the mass block 8 vibrates up and down under the common constraint of the first spring 7 and the second spring 9 due to the action of gravity and inertia, so that the TMD tuning mass damping function is realized, the vertical vibration intensity of the multi-split wire bundle can be reduced, and the vibration can be quickly subsided.
It should be further noted that the reason why the asynchronous de-icing or galloping occurs on the different sub-wires of the multi-split wire bundle is that uneven ice coating is formed on the different sub-wires, and the stress is unbalanced.
The physical performance parameters of the permanent magnet 1, the conductor disc 2, the pendulum bob 6, the first spring 7, the second spring 9 and the mass block 8 are all calculated and determined according to a theoretical model of wire deicing jump or galloping or a finite element simulation result.
The device is distributed on the wires between the towers, the specific number and the arrangement positions are determined by the span length of the lines and the vibration modes of ice-removing jumping or galloping, and the device is preferentially arranged at the wave crest or wave trough position of the maximum amplitude vibration mode.
It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the scope of protection thereof, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that various changes, modifications or equivalents may be made to the specific embodiments of the application after reading the present utility model, and these changes, modifications or equivalents are within the scope of protection of the claims appended hereto.
Claims (9)
1. An overhead line vibration suppression device based on TMD and electromagnetic combination damping, comprising: a spacer (12), a connecting frame, an electromagnetic damper and a TMD damper;
The spacing rod (12) is clamped on the overhead line, and the connecting frame is connected with the electromagnetic damper and the spacing rod (12);
the TMD damper is connected below the spacer (12).
2. The device according to claim 1, wherein the TMD damper comprises a housing (10), and a first spring (7), a mass (8) and a second spring (9) which are all arranged in the housing (10) and are sequentially connected, wherein the housing (10) is fixedly connected below the spacing rod (12), the top of the first spring (7) is abutted with the inner side of the top of the housing (10), and the bottom of the second spring (9) is abutted with the inner side of the bottom of the housing (10).
3. The device according to claim 1, characterized in that the electromagnetic damper comprises a permanent magnet assembly, a conductor disc (2) cutting the magnetic induction line, a pendulum connecting rod (5), a pendulum (6) and a disc shaft (4); the utility model discloses a pendulum bob, including connecting frame, conductor disc (2), disc shaft (4), pendulum connecting rod (5), conductor disc (2), connecting frame, pendulum connecting rod (5), pendulum (6) and pendulum connecting rod, the disc shaft (4) wears to establish on the connecting frame and rotate rather than being connected, conductor disc (2) are vertical layout, the center of conductor disc (2) and the one end fixed connection of disc shaft (4), the upper end of pendulum connecting rod (5) and the other end fixed connection of disc shaft (4), its lower extreme and pendulum (6) are connected.
4. A device according to claim 3, characterized in that the permanent magnet assembly comprises a plurality of permanent magnets (1), the plurality of permanent magnets (1) are arranged in pairs, the pairs of permanent magnets (1) are arranged in a ring shape around the center of the conductor disc (2), the two permanent magnets (1) of each pair are respectively arranged at the left side and the right side of the conductor disc (2) and are arranged at equal intervals with the conductor disc (2), and the permanent magnets (1) are arranged on the connecting frame.
5. The device according to claim 4, characterized in that the pendulum connecting rod (5) is provided with a plurality of adjustable mounting holes (11) for the rotary connection of the disc shaft (4) along its length.
6. A device according to claim 3, characterized in that the connection frame comprises two parallel and spaced cover plates (3), both cover plates (3) being fixed to the spacer bar (12), the conductor disc (2) being located in the space between the two cover plates (3), the permanent magnet assembly being arranged on the cover plates (3).
7. A device according to claim 6, characterized in that the cover plate (3) and the spacer (12) are fixed in any one of the following ways:
welding and bolting.
8. A device according to claim 6, characterized in that two cover plates (3) are arranged separately on both sides of the central cavity of the spacer (12), the conductor disc (2) being located in the central cavity of the spacer (12).
9. The device according to claim 8, characterized in that the conductor disc (2) is arranged coaxially with the spacer (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322748399.9U CN221054202U (en) | 2023-10-13 | 2023-10-13 | Overhead line vibration suppression device based on TMD and electromagnetic combined damping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322748399.9U CN221054202U (en) | 2023-10-13 | 2023-10-13 | Overhead line vibration suppression device based on TMD and electromagnetic combined damping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221054202U true CN221054202U (en) | 2024-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322748399.9U Active CN221054202U (en) | 2023-10-13 | 2023-10-13 | Overhead line vibration suppression device based on TMD and electromagnetic combined damping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221054202U (en) |
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2023
- 2023-10-13 CN CN202322748399.9U patent/CN221054202U/en active Active
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