CN111769503A - Zero-frequency vibration damper and manufacturing method thereof - Google Patents
Zero-frequency vibration damper and manufacturing method thereof Download PDFInfo
- Publication number
- CN111769503A CN111769503A CN201910255078.0A CN201910255078A CN111769503A CN 111769503 A CN111769503 A CN 111769503A CN 201910255078 A CN201910255078 A CN 201910255078A CN 111769503 A CN111769503 A CN 111769503A
- Authority
- CN
- China
- Prior art keywords
- weight
- elastic
- hinged
- power transmission
- vibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/14—Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound
Landscapes
- Vibration Prevention Devices (AREA)
Abstract
A zero-frequency vibration damper and its manufacturing method, including: the device comprises a plurality of connecting plates (1), a protective shell (2), an elastic piece (3) and a weight (4); the elastic piece (3) can stretch and is arranged in the hollow part of the protective shell (2), and the weight (4) is suspended on the elastic piece (3); the yoke plate (1) is hinged on the protective shell (2); the device is hung on the multi-split power transmission conductor through the connecting plate (1). The geometric nonlinear elastic element is introduced, so that vibration can be reduced in a wider vibration frequency domain, the connecting plate can be connected to the lead, and can also be connected with the lead through the eight-split wire clamp, so that vibration reduction of a plurality of strands of leads by a single device is realized, and the application range is wide; the device has the characteristic of multidirectional vibration, the weight can not only move up and down, but also move vertically, and move in other directions generated by the sum of orthogonal vectors of the weight and the weight, so that the vibration in all directions caused by external factors on the power transmission conducting wire can be absorbed, and the device can be installed and used in response to various working conditions.
Description
Technical Field
The invention relates to the field of disaster prevention and reduction of a power grid, in particular to a zero-frequency vibration reduction device and a manufacturing method thereof.
Background
Wind-induced vibration of a power transmission line is a common natural disaster seriously threatening safe and stable operation of a wire, and mainly comprises four phenomena of breeze vibration (5-120 Hz), subspan vibration (1-3 Hz), icing galloping (0.1-3 Hz) and windage yaw. The breeze vibration and the ice-coated dance generally have obvious vertical vibration characteristics, but the difference of frequency domain characteristics is large, the breeze vibration and the ice-coated dance are generally prevented and controlled by different measures, for example, the breeze vibration and the ice-coated dance are generally inhibited by adopting an anti-vibration hammer, a damping wire and the like, and the ice-coated dance is prevented by adopting a double-pendulum anti-vibration device, a damping spacer and the like, so that each hardware fitting has a single function and a limited treatment effect.
However, the vibration damping device on the existing power transmission conductor is designed for a vibration resonance region of a certain specific frequency domain, the pertinence is relatively strong, the existing vibration damping device is developed on the basis of a dynamic vibration absorber, the dynamic vibration absorber in the vibration damping device has relatively large weight, and the weight of the dynamic vibration absorber is mounted on the power transmission conductor, so that the bearing capacity of the power transmission conductor can be increased.
Disclosure of Invention
The invention provides a zero-frequency vibration damping device and a manufacturing method thereof, aiming at solving the problems that a vibration damping device in the prior art is complex in structure, large in additional mass and small in vibration damping frequency range.
The technical scheme provided by the invention is as follows:
a zero frequency vibration damping device, the device comprising:
a plurality of yoke plates (1), a hollow protective shell (2), an elastic piece (3) and a weight (4);
the elastic part (3) is an extensible device with a certain length, the extensible device is installed in the hollow part of the protective shell (2), and the weight (4) is suspended on the elastic part (3);
the plurality of connecting plates (1) are uniformly hinged on the protective shell (2);
the zero-frequency vibration damper is suspended on the multi-split power transmission conductor through the plurality of connecting plates (1).
Preferably, the weight of the weight (4) is a preset specific gravity of the weight of the power transmission conductor;
the weight (4) is fixedly connected to the middle part of the elastic part (3).
Preferably, the length of the elastic member (3) is determined by the weight of the weight (4).
Preferably, the length of the elastic member (3) is determined by the following formula:
wherein L is the length of the elastic element (3), F is the gravity of the weight (4), Δ s is the pre-acquired midpoint displacement, Δ L is the pre-acquired axial elongation of the elastic element, and F is the pre-acquired pre-tightening force of the elastic element (3).
Preferably, the yoke plate (1) is a hammer-shaped sheet structure made of rigid materials;
the hammer head end of the yoke plate (1) is provided with a screw hole, and the tail end of the hammer handle is provided with a hinged joint hinged on the protective shell (2).
Preferably, a spacer is arranged between the multi-split transmission conductors;
the connecting plate (1) is hinged on the spacing rod.
Preferably, the protective casing (2) is an elliptical casing comprising: an upper half shell and a lower half shell;
the upper half shell and the lower half shell are hinged and fixed;
a secondary hinge joint matched with the hinge joint of the connecting plate (1) is arranged outside the lower half shell and is used for being hinged with the connecting plate (1);
the both sides of the internal axis position of lower half casing respectively are provided with a connector link, the both ends of elastic component (3) are connected on the connector link.
Preferably, the elastic member (3) includes: elastic rubber tube, elastic rope and elastic fiber tube.
A method for manufacturing a zero-frequency vibration damper comprises the following steps:
suspending a weight (4) on the elastic member (3);
-mounting the elastic element (3) inside the protective casing (2);
and a plurality of connecting plates (1) are connected outside the protective shell (2) and hung on the multi-split power transmission wire through the connecting plates (1).
Preferably, the suspending the weight (4) on the elastic member (3) further comprises:
determining the mass of the weight (4) according to the mass of the power transmission conductor, wherein the mass of the weight (4) is a preset specific gravity of the mass of the power transmission conductor;
the length of the elastic element (3) is determined according to the mass of the weight (4).
Preferably, the length of the elastic member (3) is determined according to the mass of the weight (4) as shown in the following formula:
wherein L is the length of the elastic element (3), F is the gravity of the weight (4), Δ s is the pre-acquired midpoint displacement, Δ L is the pre-acquired axial elongation of the elastic element, and F is the pre-acquired pre-tightening force of the elastic element (3).
Preferably, said mounting of said elastic element (3) inside said protective casing (2) comprises:
and two ends of the elastic element (3) are connected with the connecting buckles at the position of the axis in the lower half shell.
Preferably, the connecting a plurality of headers (1) outside the protective housing (2) and suspending the headers (1) on the multi-split power transmission line comprises:
the tail end of a hammer handle of the yoke plate (1) provided with the hinged joint is hinged on an auxiliary hinged joint outside the lower half shell of the protective shell (2);
the upper half shell and the lower half shell of the protective shell (2) are hinged and fixed to form a closed protective shell (2);
the hammer end that yoke plate (1) was provided with the screw hole carries out threaded connection with the split clamp that sets up on every transmission line conductor.
Compared with the prior art, the invention has the beneficial effects that:
the technical scheme provided by the invention comprises the following steps: a plurality of yoke plates (1), a hollow protective shell (2), an elastic piece (3) and a weight (4); the elastic part (3) is an extensible device with a certain length, the extensible device is installed in the hollow part of the protective shell (2), and the weight (4) is suspended on the elastic part (3); the plurality of connecting plates (1) are uniformly hinged on the protective shell (2); the zero-frequency vibration damper is suspended on the multi-split power transmission conductor through the plurality of connecting plates (1). The weight block with the preset weight is attached to the geometric non-linear elastic piece, which is introduced by the invention, and is arranged in the protective shell, and the geometric non-linear elastic piece can drive the weight block to reduce vibration in a wider vibration frequency domain;
the zero-frequency vibration damper provided by the invention has the characteristic of multidirectional vibration, the weight block can not only move up and down, but also move vertical to the paper surface and move in other directions generated by the sum of orthogonal vectors of the weight block and the paper surface, so that the vibration in each direction caused by external factors on a power transmission conductor can be absorbed, and the zero-frequency vibration damper can be mounted and used in response to various working conditions;
the device provided by the invention can be connected with a wire through the eight-split wire clamp, so that the vibration of a single device on a multi-strand wire is reduced, and the application range is wide.
Drawings
FIG. 1 is a structural diagram of a zero-frequency vibration damping device of the present invention;
FIG. 2 is an installation view of the zero frequency vibration damping device of the present invention;
FIG. 3 is a schematic diagram of the design of the zero frequency damping device of the present invention;
FIG. 4 is a response graph of the zero frequency damping device of the present invention;
wherein, 1-yoke plate, 2-protection object, 3-elastic element, 4-weight.
Detailed Description
For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
Example 1: the present embodiment provides a zero-frequency damping device, as shown in fig. 1.
The device comprises: a plurality of headers 1, a hollow protective housing 2, an elastic member 3 and a weight 4;
the elastic part 3 is an extensible device with a certain length and is arranged in the hollow part of the protective shell 2, the heavy block 4 is suspended on the elastic part 3, the nonlinear energy tank theory is a novel vibration absorber technology developed on the basis of a dynamic vibration absorber, and the purposes of widening the vibration absorbing frequency range and improving the vibration absorbing effect are achieved by changing the linear rigidity and the damping of the traditional vibration absorbing system; a plurality of the connecting plates 1 are uniformly hinged on the protective shell 2; the zero-frequency vibration damper is suspended on the spacer frame body through the plurality of connecting plates 1 and further mounted on the multi-split transmission conductor.
The yoke plate 1 is a hammer-shaped sheet structure made of rigid materials; the hammer end of yoke plate 1 is provided with the screw hole, and the tail end is provided with the hinge joint and articulates on protection casing 2. The power transmission conductor is provided with a splitting wire clamp, the splitting wire clamp is connected with a plurality of conductors, and the hammer head end of the yoke plate 1 is connected with the splitting wire clamp in a threaded manner through the screw hole.
The protective casing 2 is an elliptical casing comprising: an upper half shell and a lower half shell; the upper half shell and the lower half shell are fixedly hinged through bolts; a plurality of auxiliary hinged joints matched with the hinged joints are arranged outside the lower half shell and are used for being hinged with the hinged joints at the tail end of the hammer handle of the yoke plate 1; the both sides of the internal portion axis position of lower half casing respectively are provided with a connector link, the both ends of elastic component 3 are connected on the connector link.
The length of the elastic member 3 is determined by the weight of the weight 4; the elastic member 3 includes: flexible materials with elastic performance such as elastic rubber tubes, elastic ropes, elastic fiber tubes and the like.
The length of the elastic member 3 is determined by the following formula:
L＝2l
wherein, L is the length of the elastic part 3, and L is half the length of the elastic part 3;
the half length of the elastic member 3 is determined by the following equation:
wherein F is the pre-tightening force of the elastic member 3, l is the half length of the elastic member 3, F is the gravity of the weight 4, Δ s is the pre-obtained midpoint displacement, and Δ l is the pre-obtained axial elongation of the elastic member.
The general score is obtained based on the formula:
where L is the length of the elastic member 3, F is the weight of the weight 4, Δ s is the pre-acquired midpoint displacement, Δ L is the pre-acquired axial elongation of the elastic member, and F is the pre-acquired pre-tightening force of the elastic member 3.
The weight of the weight 4 is the preset specific gravity of the weight of the power transmission conductor, and the weight is calculated according to the external multi-split power transmission conductor, so that the mass of the weight 4 is obviously smaller than that of a dynamic vibration absorber in the conventional damping device; the weight 4 is fixedly connected to the middle of the elastic member 3.
Example 2:
the installation scheme of the zero-frequency vibration damper provided by the embodiment is shown in fig. 2.
The zero-frequency vibration damper can be installed on a wire or a split wire clamp.
The design principle of the zero-frequency vibration damper provided by the invention is shown in figure 3, the advantage of geometric nonlinearity is that the characteristic of geometric nonlinearity can be realized by utilizing a linear spring, and in the figure: f is the pretightening force of the elastic part 3, l is the half length of the elastic part 3, k is the elastic coefficient, F is the gravity of the heavy object 4, deltas is the midpoint displacement, and deltal is the axial elongation of the elastic part.
As shown in the following formula, the left side of the equal sign is a force vector triangle, and the right side is a deformation triangle:
the corresponding geometrical relationship is as follows:
l2+Δs2＝(l+Δl)2
in tandem with the above two formulae, Δ l is eliminated to give:
taylor expansion is carried out on the above formula near the origin Δ s ═ 0, and the first cubic term is retained, then:
therefore, the linear stiffness is:
wherein k is1Linear stiffness.
And cubic stiffness is:
wherein k is3Is the cubic stiffness.
When f approaches 0, k1 approaches 0 and the natural frequency approaches 0, so when f is 0:
according to the theory of mechanical vibration, the forced vibration equation of the vibration structure of the vibration damper is as follows:
wherein m is a mass of,
is the first amount of forcing, and x (t) is the second amount of forcing.
Where L is the length of the elastic member 3, F is the weight of the weight 4, Δ s is the pre-acquired midpoint displacement, Δ L is the pre-acquired axial elongation of the elastic member, and F is the pre-acquired pre-tightening force of the elastic member 3.
When m is 200kg, k3 is 20000N/m 3, and F is 3N, the response curve shown in fig. 4 is obtained according to the analysis result of geometric nonlinear dynamics.
As can be seen from the figure, the response of the damper is not 0 at each frequency point, and the damper tends to increase with increasing frequency. In the wire-damper coupled system, no matter the icing waving with low frequency occurs or the breeze vibration with high frequency occurs, the characteristics are obviously beneficial to the damper to continuously absorb the vibration energy of the system, thereby achieving the purpose of protecting the wire.
The main structure of the vibration damper is a geometric nonlinear vibrator structure, mainly based on the theory of geometric nonlinear energy tanks, and is characterized in that the vibration damper can actively respond to external excitation in a very wide frequency domain to generate large amplitude, thereby achieving the purposes of absorbing system energy and protecting a main vibration body;
the problems mainly faced and solved by the present damper include, but are not limited to, the aeolian vibration and the ice-coating waving of the wire, and also include the reciprocating action of the wire generating a large displacement amplitude in a certain other direction. The vibration damping structure has the characteristic of multidirectional vibration, and the weight can not only move up and down, but also move perpendicular to the paper surface and move in other directions due to the sum of orthogonal vectors of the weight and the paper surface.
Example 3:
the embodiment provides a manufacturing method of a zero-frequency vibration damper, which comprises the following steps:
the method comprises the following steps: suspending a weight 4 on the elastic member 3;
step two: mounting the elastic member 3 inside the protective casing 2;
step three: the protective shell 2 is externally connected with a plurality of connecting plates 1, and is hung on a spacer frame body through the connecting plates 1 and further mounted on a multi-split power transmission conductor.
Before the step one, the method further comprises the following steps:
determining the mass of the weight 4 according to the mass of the power transmission conductor, wherein the mass of the weight 4 is a preset specific gravity of the mass of the power transmission conductor;
the length of the elastic member 3 is determined according to the mass of the weight 4.
The length of the elastic member 3 is determined according to the mass of the weight 4, as shown in the following formula:
wherein F is the gravity of the weight 4, Δ s is the pre-obtained midpoint displacement, Δ l is the pre-obtained axial elongation of the elastic member, and F is the pre-obtained pre-tightening force of the elastic member 3.
Step two, comprising:
and two ends of the elastic element 3 are connected with the connecting buckles at the position of the axis inside the lower half shell.
Step three, comprising:
the tail end of a hammer handle of the yoke plate 1 provided with the hinge joint is hinged on an auxiliary hinge joint outside a lower half shell of the protective shell 2;
fixedly hinging the upper half shell and the lower half shell of the protective shell 2 through bolts to form a closed protective shell 2;
the hammer end that yoke plate 1 was provided with the screw hole carries out threaded connection with the split cable clamp that sets up on many transmission conductors.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (13)
1. A zero frequency vibration damping device, said device comprising:
a plurality of yoke plates (1), a hollow protective shell (2), an elastic piece (3) and a weight (4);
the elastic part (3) is an extensible device with a certain length, the extensible device is installed in the hollow part of the protective shell (2), and the weight (4) is suspended on the elastic part (3);
the plurality of connecting plates (1) are uniformly hinged on the protective shell (2);
the zero-frequency vibration damper is suspended on the multi-split power transmission conductor through the plurality of connecting plates (1).
2. The apparatus of claim 1,
the weight of the weight block (4) is a preset specific gravity of the weight of the power transmission conductor;
the weight (4) is fixedly connected to the middle part of the elastic part (3).
3. The apparatus of claim 2,
the length of the elastic member (3) is determined by the weight of the weight (4).
4. A device according to claim 3, characterized in that the length of the elastic element (3) is determined by the following equation:
wherein L is the length of the elastic element (3), F is the gravity of the weight (4), Δ s is the pre-acquired midpoint displacement, Δ L is the pre-acquired axial elongation of the elastic element, and F is the pre-acquired pre-tightening force of the elastic element (3).
5. The apparatus of claim 1,
the yoke plate (1) is in a hammer-shaped sheet structure made of rigid materials;
the hammer head end of the yoke plate (1) is provided with a screw hole, and the tail end of the hammer handle is provided with a hinged joint hinged on the protective shell (2).
6. The apparatus of claim 5,
a spacer is arranged between the multi-split power transmission conductors;
the connecting plate (1) is hinged on the spacing rod.
7. The apparatus of claim 5,
the protection casing (2) is an oval casing comprising: an upper half shell and a lower half shell;
the upper half shell and the lower half shell are hinged and fixed;
a secondary hinge joint matched with the hinge joint of the connecting plate (1) is arranged outside the lower half shell and is used for being hinged with the connecting plate (1);
the both sides of the internal axis position of lower half casing respectively are provided with a connector link, the both ends of elastic component (3) are connected on the connector link.
8. The apparatus of claim 4,
the elastic member (3) includes: elastic rubber tube, elastic rope and elastic fiber tube.
9. A method for manufacturing a zero-frequency vibration damper is characterized by comprising the following steps:
suspending a weight (4) on the elastic member (3);
-mounting the elastic element (3) inside the protective casing (2);
and a plurality of connecting plates (1) are connected outside the protective shell (2) and hung on the multi-split power transmission wire through the connecting plates (1).
10. The method according to claim 9, wherein said suspending the weight (4) from the resilient member (3) further comprises:
determining the mass of the weight (4) according to the mass of the power transmission conductor, wherein the mass of the weight (4) is a preset specific gravity of the mass of the power transmission conductor;
the length of the elastic element (3) is determined according to the mass of the weight (4).
11. A method as claimed in claim 10, wherein the length of the elastic member (3) is determined on the basis of the mass of the weight (4) as follows:
wherein L is the length of the elastic member (3), F is the gravity of the weight (4), k is the elastic coefficient, Δ s is the pre-acquired midpoint displacement, Δ L is the pre-acquired axial elongation of the elastic member, and F is the pre-acquired pre-tightening force of the elastic member (3).
12. The method according to claim 9, wherein said mounting of said elastic element (3) inside said protective casing (2) comprises:
and two ends of the elastic element (3) are connected with the connecting buckles at the position of the axis in the lower half shell.
13. The method according to claim 9, wherein said connecting a plurality of headers (1) outside said protective casing (2) and hanging on a multi-split power transmission line through said headers (1) comprises:
the tail end of a hammer handle of the yoke plate (1) provided with the hinged joint is hinged on an auxiliary hinged joint outside the lower half shell of the protective shell (2);
the upper half shell and the lower half shell of the protective shell (2) are hinged and fixed to form a closed protective shell (2);
the hammer end that yoke plate (1) was provided with the screw hole carries out threaded connection with the split clamp that sets up on every transmission line conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910255078.0A CN111769503B (en) | 2019-04-01 | 2019-04-01 | Zero frequency vibration damper and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910255078.0A CN111769503B (en) | 2019-04-01 | 2019-04-01 | Zero frequency vibration damper and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111769503A true CN111769503A (en) | 2020-10-13 |
| CN111769503B CN111769503B (en) | 2023-09-08 |
Family
ID=72718786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910255078.0A Active CN111769503B (en) | 2019-04-01 | 2019-04-01 | Zero frequency vibration damper and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111769503B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102227072A (en) * | 2011-03-01 | 2011-10-26 | 东北电力大学 | Anti-vibration and anti-oscillation damping spring spacer |
| CN204538621U (en) * | 2015-05-08 | 2015-08-05 | 国网河南省电力公司电力科学研究院 | A kind of multiple degrees of freedom anti-dance device |
| CN204681032U (en) * | 2015-06-10 | 2015-09-30 | 湖南国电瑞驰电力勘测设计有限公司 | Damping spring spacer |
| CN105552813A (en) * | 2016-01-26 | 2016-05-04 | 大连理工大学 | Collision energy-dissipation spacing rod |
| CN208015325U (en) * | 2018-03-22 | 2018-10-26 | 江苏双汇电力发展股份有限公司 | A kind of lead spacer |
| CN208299408U (en) * | 2018-06-30 | 2018-12-28 | 扬州鑫宝利金属制品有限公司 | Bouncing-prevention damping spacing rod |
-
2019
- 2019-04-01 CN CN201910255078.0A patent/CN111769503B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102227072A (en) * | 2011-03-01 | 2011-10-26 | 东北电力大学 | Anti-vibration and anti-oscillation damping spring spacer |
| CN204538621U (en) * | 2015-05-08 | 2015-08-05 | 国网河南省电力公司电力科学研究院 | A kind of multiple degrees of freedom anti-dance device |
| CN204681032U (en) * | 2015-06-10 | 2015-09-30 | 湖南国电瑞驰电力勘测设计有限公司 | Damping spring spacer |
| CN105552813A (en) * | 2016-01-26 | 2016-05-04 | 大连理工大学 | Collision energy-dissipation spacing rod |
| CN208015325U (en) * | 2018-03-22 | 2018-10-26 | 江苏双汇电力发展股份有限公司 | A kind of lead spacer |
| CN208299408U (en) * | 2018-06-30 | 2018-12-28 | 扬州鑫宝利金属制品有限公司 | Bouncing-prevention damping spacing rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111769503B (en) | 2023-09-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2271935A (en) | Vibration damper | |
| Ding et al. | NES cell | |
| CN104362570B (en) | Cross arm hanging point load calculating method under fluctuating wind effect during transmission line windage yaw | |
| CN102227072A (en) | Anti-vibration and anti-oscillation damping spring spacer | |
| CN102227073A (en) | Damping spring vibration-proof hammer | |
| CN105552813A (en) | Collision energy-dissipation spacing rod | |
| CN103807562A (en) | Adjustable device for restraining ship pipeline vibration and noise | |
| Che et al. | The influence of different constraints and pretightening force on vibration and stiffness in railgun | |
| Qin et al. | Research on the galloping and anti-galloping of the transmission line | |
| CN203822547U (en) | Self vibration-reduction wind generating set | |
| CN111769503A (en) | Zero-frequency vibration damper and manufacturing method thereof | |
| CN203783823U (en) | Wind power generator unit vibration damper | |
| CN111834969B (en) | Floating shock absorber with rigidity | |
| CN105443649A (en) | High-damp magnesium alloy vibration isolation structure and application thereof | |
| CN110912062B (en) | Vibration damper for preventing transmission line from vibrating substantially | |
| CN105220615A (en) | A kind of vibration absorber suppressing large-span suspension bridge suspension rod wind-induced vibration | |
| RU2501138C2 (en) | Dampener of low-frequency oscillations in wires, cables and wire ropes | |
| Zhou et al. | Match of negative stiffness and viscous damping in a passive damper for cable vibration control | |
| RU2533657C1 (en) | Vibration damper | |
| CN207010184U (en) | A kind of high-tension electricity gold utensil | |
| RU2249893C1 (en) | Ice and conductor vibration limiter for overhead power transmission lines | |
| RU2334327C1 (en) | Spreader-suppressor for two phase-splitted conductors of aerial power line | |
| CN210838892U (en) | Inertia amplification type transmission line vibration damping cable | |
| CN113048187A (en) | Overhead conductor wide-frequency-domain dynamic vibration reduction device based on electromagnetic damping technology | |
| Biswas et al. | Optimal control of flow-induced vibration of pipeline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |