CN207453610U - A kind of double pendulum type damper - Google Patents
A kind of double pendulum type damper Download PDFInfo
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- CN207453610U CN207453610U CN201721164288.1U CN201721164288U CN207453610U CN 207453610 U CN207453610 U CN 207453610U CN 201721164288 U CN201721164288 U CN 201721164288U CN 207453610 U CN207453610 U CN 207453610U
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Abstract
It is small and the pendulum length of the vibration damping demand on power transmission tower in both direction and hanger cannot be met cannot meet the technical issues of weight hangs demand for solving tuning damping technology damping frequency range at present applied to power transmission tower vibration damping the utility model discloses a kind of double pendulum type damper.The utility model includes：Outer barrel and nunchakus, nunchakus are arranged at the inside of outer barrel；Outer barrel is fixed on by the fastener at top on power transmission tower cross-arm；Nunchakus includes first segment rod and Two-section rod；The first end of first segment rod is fixedly connected by the first universal coupling with the roof inside outer barrel, for first segment rod to be enabled to be swung for 360 ° in the plane parallel to the earth；The first end of Two-section rod is fixedly connected by the second universal coupling with the second end of first segment rod, for Two-section rod to be enabled to be swung for 360 ° in the plane parallel to the earth.
Description
Technical field
The utility model is related to power transmission tower tuning antivibration area more particularly to a kind of double pendulum type dampers.
Background technology
Great span high pressure and ultrahigh voltage AC and DC power transmission tower-line system have the spies such as towering, span is big, flexibility is strong
Point, for the natural frequency of vibration close to the frequency of high wind, wind sensibility is stronger, is responded under wind-force effect larger, easily occurs because of wind lotus
Carry and caused by structural system malicious event, electric power system is caused to be paralysed, heavy losses are brought to national economy.
Traditional power transmission tower wind force proofing design is mainly by increasing the wind loading rating of structure in itself (such as：Reinforcement structure increases structure
Part section or component material improve rigidity of structure etc.) resist the effect of wind load.This design method is uneconomical, also lacks
Capacity of self-regulation, it is impossible to make corresponding adjustment for high wind excitation, wind excitation can not be met and wanted with stronger randomness
It asks.Rationally effective wind resistance approach is to apply control system to electric power pylon structure, is born jointly by control system and structure outer
The effect of boundary's high wind load, i.e., common storage and dissipation wind shake energy.With power transmission tower to it is towering and enlargement direction develop, subtract
Control technology of shaking more and more is used widely.For large-scale tall and slender structure and building, maturity is higher, using comparing
It is widely energy-eliminating shock-absorbing technology and tuning damping technology.
Energy-eliminating shock-absorbing technology is the hysteretic energy characteristic using viscoelastic material, converts vibrational energy into heat, so as to
Reduce vibration.Energy dissipator usually requires to be arranged in the larger position of malformation.By the shadow of environment temperature, vibration and plastic strain amplitude
It rings, the easy aging of viscoelastic material.
Tuning damping technology sets a set of supplementary structure on the body construction, is to auxiliary by main structure vibrational energy transfer
On system, so as to fulfill main structure vibration damping.This kind of device includes：Tuned mass damper, Tuned Liquid and tuning liquid
Column type damper, tuning spin damper, Suspended mass pendulum etc..At present, inhibit that field is widely applied to be in power transmission tower wind shake
Suspended mass pendulum.In general, installing several Suspended mass pendulums at power transmission tower top cross-arm position, each Suspended mass pendulum is by weight
Negligible rope suspensions, under wind load excitation, Suspended mass pendulum moves in perpendicular.The inertia of Suspended mass pendulum
Force reaction is in power transmission tower, so as to reduce the vibration of power transmission tower.The Suspended mass pendulum of this design is taken to be deposited in engineer application
In following defect：(1) only resonant frequency point there are one tools, therefore the vibration damping being only applicable on 1 direction.Since power transmission tower is suitable
Power transmission line moves towards and vertical power transmission line walks upward dynamic characteristics there is some difference, and often resonant frequency differs greatly, this dress
Power transmission tower cannot be met in vertical power transmission line and the vibration damping demand along power transmission line direction simultaneously by putting.(2) applicable frequency range
It is narrow.Known by dynamic vibration absorber theory, only when the very close exciting force frequency of the frequency of bump leveller, effectiveness in vibration suppression can just compare
Substantially.Two frequencies slightly deviation, effectiveness in vibration suppression will be greatly lowered.Therefore Suspended mass pendulum is applied to transmission of electricity tower vibrations
The validity of control depends on the accurate estimation to Dynamic Characteristics of Controlled Structure.Due on power transmission tower there are power transmission line, damper,
The coupling of damping wire, conductor spacer etc., intrinsic frequency is calculated there are certain error, therefore the effectiveness in vibration suppression of Suspended mass pendulum is past
It is past to be subject to large effect, it is impossible to reach preferable effect.(3) pendulum length of Suspended mass pendulum depends on control frequency.Such as in order to
2Hz vibrations are controlled, pendulum length is about 62mm, and pendulum length is shorter.Theoretical, the weight weight of Suspended mass pendulum lower end from dynamic vibration absorber
Amount is about the 1%~2% of power transmission tower gross weight, reaches 10t magnitudes, and shorter pendulum length can not meet big quality weight suspension demand,
Balance can not be reached between pendulum length and weight suspension.
Utility model content
The utility model embodiment discloses a kind of double pendulum type damper, solves the tune for being applied to power transmission tower vibration damping at present
Humorous damping technology damping frequency range is small and cannot meet the pendulum of the vibration damping demand and hanger on power transmission tower in both direction
Length cannot meet the technical issues of weight suspension demand.
A kind of double pendulum type damper that the utility model embodiment provides, including：
Outer barrel and nunchakus, nunchakus are arranged at the inside of outer barrel；
Outer barrel is fixed on by the fastener at top on power transmission tower cross-arm；
Nunchakus includes first segment rod and Two-section rod；
The first end of first segment rod is fixedly connected by the first universal coupling with the roof inside outer barrel, for causing
One section rod being capable of 360 ° of swings in the plane parallel to the earth；
The first end of Two-section rod is fixedly connected by the second universal coupling with the second end of first segment rod, for causing
Two-section rod being capable of 360 ° of swings in the plane parallel to the earth.
A kind of double pendulum type damper that the utility model embodiment provides, further includes：Rubber ring；
Rubber ring includes the first rubber ring and the second rubber ring；
First rubber ring is fixedly installed on the inside of outer barrel, for /V and prevents the second end and outer barrel of first segment rod
Internal wall collides；
Second rubber ring is fixedly installed on the inside of outer barrel, for /V and prevents the second end and outer barrel of Two-section rod
Internal wall collides.
Preferably, the first gap between the first rubber ring and first segment rod is less than between the second rubber ring and Two-section rod
The second gap.
Preferably, the quality of first segment rod is equal with the quality of Two-section rod；
The length and the length of Two-section rod of first segment rod are unequal.
Preferably, outer barrel is provided with ventilation opening, for blowing nunchakus for extraneous wind.
Preferably, fastener specifically includes：Bolt, stud or screw.
As can be seen from the above technical solutions, the utility model embodiment has the following advantages：
By setting the double pendulum type damper based on nunchakus on power transmission tower cross-arm, two sections due to nunchakus are saved rod formula
Swing design, i.e., the amplitude of fluctuation of first segment rod and frequency less than Two-section rod amplitude of fluctuation and frequency so that damper
Resonant frequency point expanded by 1 as 2, power transmission tower can be met simultaneously in vertical power transmission line and subtracting along power transmission line direction
It shakes demand, and resonant frequency point is expanded as after 2, effective damping frequency range is also widened, and can be subtracted to the full extent
The weak coupling due on power transmission tower causes intrinsic frequency to calculate there are the influence to effectiveness in vibration suppression caused by error, this
Outside, the oscillating rod type structure of nunchakus rather than swing ball or mass block are employed, pendulum length restricted problem can be solved.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of structure diagram for double pendulum type damper that the utility model embodiment provides.
Fig. 2 is a kind of suspension schematic diagram for double pendulum type damper that the utility model embodiment provides.
Fig. 3 is a kind of flow for power transmission tower oscillation damping method based on double pendulum type damper that the utility model embodiment provides
Schematic diagram.
Structural model schematic diagrames of the Fig. 4 for the nunchakus that the utility model embodiment provides when swinging.
Specific embodiment
The utility model embodiment discloses a kind of double pendulum type damper, for solving at present applied to power transmission tower vibration damping
Tuning damping technology damping frequency range is small and cannot meet the vibration damping demand on power transmission tower in both direction and hanger
Pendulum length cannot meet the technical issues of weight suspension demand.
Referring to Fig. 1, a kind of structure diagram of the double pendulum type damper provided for the utility model embodiment.
Referring to Fig. 2, a kind of suspension schematic diagram of the double pendulum type damper provided for the utility model embodiment.
A kind of double pendulum type damper that the utility model embodiment provides includes：
Outer barrel 1 and nunchakus, nunchakus are arranged at the inside of outer barrel 1；Outer barrel 1 is fixed by the fastener at top
In on power transmission tower cross-arm, specifically seeing Fig. 2, TMD (tuned mass damper, tuned mass damper) represents outstanding in figure
The double pendulum type damper of extension.Wherein, fastener specifically includes：Bolt, stud or screw.Nunchakus includes first segment rod 3 and the
Two-section rod 6；The first end of first segment rod 3 is fixedly connected by the first universal coupling 2 with the roof inside outer barrel 1, for making
Obtaining first segment rod 3 being capable of 360 ° of swing in the plane parallel to the earth；The first end of Two-section rod 6 passes through the second universal coupling
5 are fixedly connected with the second end of first segment rod 3, for Two-section rod 6 to be enabled to be put for 360 ° in the plane parallel to the earth
It is dynamic.In addition, the effect of the first universal coupling 2 and the second universal coupling 5 is mainly to provide the connection of first segment rod 3 and outer barrel 1
The connection relation of relation and Two-section rod 6 and first segment rod 3, and cause first segment rod 3 and Two-section rod 6 can be in the external world
Swung with the wind under the wind action that any direction is blown, i.e., in the plane parallel to the earth 360 ° of swings (include along defeated
The direction of the power transmission line of pylon and perpendicular to power transmission tower power transmission line direction).
It should be noted that outer barrel 1 is not the outer barrel 1 for Seal Design.Ventilation opening is provided on outer barrel 1, is used
Nunchakus is blown in the wind for the external world.The opening design method of ventilation opening can be added according to reality by wind blows situation, outer barrel 1
1 making material of work mode and outer barrel etc. is determined, as long as meeting nunchakus can be blown by the external world and be swung i.e.
Can, it is not especially limited herein.The main function of outer barrel 1 is the amplitude of fluctuation for limiting nunchakus, in order to avoid under high wind effect
The amplitude of fluctuation of nunchakus is excessive, is impacted power transmission line of the power transmission tower or on power transmission tower in itself, causes power transmission line short circuit etc.
Security risk.
Further, in order to carry out further /V to the amplitude of fluctuation of nunchakus, nunchakus is avoided in the process of swing
In with outer barrel 1 occur strong collision, the double pendulum type damper that the utility model embodiment provides further includes：Rubber ring；Rubber
Cushion rubber includes the first rubber ring 4 and the second rubber ring 7；First rubber ring 4 is fixedly installed on the inside of outer barrel 1, for preventing
The second end of first segment rod 3 collides with 1 inner wall of outer barrel；Second rubber ring 7 is fixedly installed on the inside of outer barrel 1, uses
It collides in preventing the second end of Two-section rod 6 with 1 inner wall of outer barrel.In general, the first rubber ring 4 is positioned close to
The position of the second end (lower end) of first segment rod 3, the second rubber ring 7 are positioned close to the second end (lower end) of Two-section rod 6
Position.
Further, the amplitude swung to further limit the amplitude of the swing of first segment rod 3 with Two-section rod 6 differs
It causes, the first gap between the first rubber ring 4 and first segment rod 3 is less than second between the second rubber ring 7 and Two-section rod 6
Gap.
Further, the quality of first segment rod 3 is equal with the quality of Two-section rod 6；The length of first segment rod 3 and the second section
The length of rod 6 is unequal.
It is above a kind of detailed description of the double pendulum type damper provided the utility model embodiment, it below will be to this reality
A kind of power transmission tower oscillation damping method based on double pendulum type damper provided with new embodiment is described in detail.
Referring to Fig. 3, a kind of power transmission tower vibration damping side based on double pendulum type damper provided for the utility model embodiment
The flow diagram of method.
A kind of power transmission tower oscillation damping method based on double pendulum type damper that the utility model embodiment provides, applied to this reality
Any one the double pendulum type damper provided with new embodiment, including：
S201, determined according to the gross mass of power transmission tower double pendulum type damper nunchakus quality.
First, determine to need the quantity of the double pendulum type damper hung on power transmission tower, such as 2 or 4, and according to power transmission tower
Gross mass and the quantity of double pendulum type damper determine the quality of the nunchakus in each double pendulum type damper.Generally, by two
Section nunchakus quality be taken as it is equal, i.e., the quality of first segment rod equal to Two-section rod quality.If 2 pairs are filled on power transmission tower
Pendulum damper, then the quality of single hop nunchakus be taken as the 1% of power transmission tower gross mass；If fill 4 double pendulum type dampers, single hop
The quality of nunchakus is taken as the 0.5% of power transmission tower gross mass, is represented by with formula one：
M=μ × M；(1)
Wherein, m is the quality of every section of nunchakus, and M is power transmission tower gross mass, and μ is coefficient, according to the quantity (2 of damper
Or 4) 1% and 0.5% can be taken as respectively.
Referring to Fig. 4, the structural model schematic diagram for the nunchakus that the utility model embodiment provides when swinging.Its
In, double-cut stick free movement kinetics equation can be expressed as：
Wherein：G is acceleration of gravity, L1,L2For double sections
The length of rod, θ1,θ2For the pivot angle of double-cut stick.Vertical power transmission line trend with to walk upward kinetics equation along power transmission line identical.
S202, according to power transmission tower parallel to the natural frequency ω on power transmission line direction3And power transmission tower vertical
Natural frequency ω on power transmission line direction4Determine the resonance frequency omega of double pendulum type damper1And resonance frequency omega2, and by resonance
Frequencies omega1And resonance frequency omega2Iterative solution obtains the length of nunchakus.
If power transmission tower is respectively ω walking upward intrinsic frequency along power transmission line trend and vertical power transmission line3And ω4, by tune
Humorous quality damper vibration damping is theoretical, can be to should determine that two resonance frequency omegas of double pendulum type damper1And ω2Its correspondence is such as
Following formula：
Then, by resonance frequency omega1And resonance frequency omega2It is asked according to resonant frequency equation by Nonlinear System of Equations iteration
Solution obtains the length of nunchakus, and resonant frequency equation is specially：
Wherein：G is acceleration of gravity, L1,L2For binodal
The length of rod.
S203, the diameter that nunchakus is determined according to the quality and length of nunchakus.
Nunchakus is designed as cylinder, quality is uniformly distributed along its length.It can be determined according to quality and length double
Save the diameter d of rodi：
Wherein, ρ0For the density of material of double-cut stick.
S204, gap between rubber ring and nunchakus inside double pendulum type damper is determined according to the length of nunchakus.
In the lower part of first segment rod and Two-section rod, one group of rubber ring is respectively arranged, gap is taken as the pendulum length of nunchakus
1.5%, corresponding angle of oscillation is about 0.86 °, therefore the clearance delta of 2 groups of rubber rings1,Δ2Respectively：
Δ1=1.5% × L1
Δ2=1.5% × (L1+L2)
Rubber ring is while playing /V and preventing that double-cut stick from colliding with fixation wall, moreover it is possible to play certain damping and make
With.
S205, corresponding double pendulum type damper is designed according to the quality of nunchakus, length and diameter, and by double pendulum type vibration damping
Device is installed on power transmission tower cross-arm.
After calculating determines the parameter of double pendulum type damper, processing can be designed to double pendulum type damper, most
It is installed to afterwards on the cross-arm on power transmission tower top.
By setting the double pendulum type damper based on nunchakus, and root on power transmission tower cross-arm in the utility model embodiment
According to power transmission tower parallel to the natural frequency ω on power transmission line direction3And power transmission tower on power transmission line direction
Natural frequency ω4The parameters such as quality, length and diameter to the nunchakus of double pendulum type damper have carried out corresponding design so that double
The effectiveness in vibration suppression of pendulum damper can meet power transmission tower in vertical power transmission line and the vibration damping demand along power transmission line direction simultaneously.
Due to the swing design of two sections of section rod formulas of nunchakus, i.e. the amplitude of fluctuation of first segment rod and frequency is less than the swing of Two-section rod
Amplitude and frequency so that the resonant frequency point of damper is expanded by 1 as 2, can be met power transmission tower simultaneously and vertically transmitted electricity
Line and the vibration damping demand along power transmission line direction, and resonant frequency point is expanded as after 2, effective damping frequency range is also widened
, can weaken to the full extent due to the coupling on power transmission tower so that intrinsic frequency calculate there are caused by error
Influence to effectiveness in vibration suppression in addition, employing the oscillating rod type structure of nunchakus rather than swing ball or mass block, can solve to put
Long restricted problem is small and cannot expire so as to solve tuning damping technology damping frequency range at present applied to power transmission tower vibration damping
The pendulum length of vibration damping demand and hanger on sufficient power transmission tower in both direction cannot meet the technical issues of weight suspension demand.
A kind of double pendulum type damper provided by the utility model is described in detail above, for the one of this field
As technical staff, based on the idea of the embodiment of the present invention, have change in specific embodiments and applications
Place, in conclusion this specification content should not be construed as the limitation to the utility model.
Claims (6)
1. a kind of double pendulum type damper, which is characterized in that including：
Outer barrel and nunchakus, the nunchakus are arranged at the inside of the outer barrel；
The outer barrel is fixed on by the fastener at top on power transmission tower cross-arm；
The nunchakus includes first segment rod and Two-section rod；
The first end of the first segment rod is fixedly connected by the first universal coupling with the roof inside the outer barrel, for making
Obtaining the first segment rod being capable of 360 ° of swing in the plane parallel to the earth；
The first end of the Two-section rod is fixedly connected by the second universal coupling with the second end of the first segment rod, for making
Obtaining the Two-section rod being capable of 360 ° of swing in the plane parallel to the earth.
2. double pendulum type damper according to claim 1, which is characterized in that further include：Rubber ring；
The rubber ring includes the first rubber ring and the second rubber ring；
First rubber ring is fixedly installed on the inside of the outer barrel, for /V and prevents the second of the first segment rod
End collides with the outer barrel inner wall；
Second rubber ring is fixedly installed on the inside of the outer barrel, for /V and prevents the second of the Two-section rod
End collides with the outer barrel inner wall.
3. double pendulum type damper according to claim 2, which is characterized in that first rubber ring and the first segment rod
Between the first gap be less than the second gap between second rubber ring and the Two-section rod.
4. double pendulum type damper according to claim 1, which is characterized in that the quality of the first segment rod and described second
The quality for saving rod is equal；
The length and the length of the Two-section rod of the first segment rod are unequal.
5. double pendulum type damper according to claim 1, which is characterized in that the outer barrel is provided with ventilation opening, is used for
The nunchakus is blown for extraneous wind.
6. double pendulum type damper according to claim 1, which is characterized in that the fastener specifically includes：Bolt, stud
Or screw.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721164288.1U CN207453610U (en) | 2017-09-12 | 2017-09-12 | A kind of double pendulum type damper |
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| CN201721164288.1U CN207453610U (en) | 2017-09-12 | 2017-09-12 | A kind of double pendulum type damper |
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ID=62282806
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110481730A (en) * | 2019-07-31 | 2019-11-22 | 黄安康 | A kind of ship Overthrow preventing device and its working method |
-
2017
- 2017-09-12 CN CN201721164288.1U patent/CN207453610U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110481730A (en) * | 2019-07-31 | 2019-11-22 | 黄安康 | A kind of ship Overthrow preventing device and its working method |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20200110 Address after: 510000 room 501-503, annex building, Huaye building, No.1-3, Chumo new street, Xihua Road, Yuexiu District, Guangzhou City, Guangdong Province Patentee after: Guangdong Electric Power Research Institute of energy technology limited liability company Address before: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Co-patentee before: Guangdong Electric Power Research Institute of energy technology limited liability company Patentee before: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Room 501-503, annex building, Huaye building, No.1-3 Chuimao new street, Xihua Road, Yuexiu District, Guangzhou City, Guangdong Province 510000 Patentee after: China Southern Power Grid Power Technology Co.,Ltd. Address before: Room 501-503, annex building, Huaye building, No.1-3 Chuimao new street, Xihua Road, Yuexiu District, Guangzhou City, Guangdong Province 510000 Patentee before: GUANGDONG ELECTRIC POWER SCIENCE RESEARCH INSTITUTE ENERGY TECHNOLOGY Co.,Ltd. |