CN100572670C - Built-in air energy-eliminating shock-absorbing damper - Google Patents
Built-in air energy-eliminating shock-absorbing damper Download PDFInfo
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- CN100572670C CN100572670C CNB2006100401178A CN200610040117A CN100572670C CN 100572670 C CN100572670 C CN 100572670C CN B2006100401178 A CNB2006100401178 A CN B2006100401178A CN 200610040117 A CN200610040117 A CN 200610040117A CN 100572670 C CN100572670 C CN 100572670C
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Abstract
A kind of brand-new built-in air energy-eliminating shock-absorbing damper belongs to the suspension cable antivibration area.It is characterized in that: the suspension cable energy-eliminating shock-absorbing system that it is made up of hub, metal outside hub, last connector, lower connector, air bag, air valve, air gauge, steel pipe bearing etc. in rain cover, rubber sheath, the metal; The nuisance vibration of suspension cable passes to air bag by hub in rubber sheath and the metal, air bag is support with the steel pipe bearing, it is that damping force remakes and is used for suspension cable that negative side's power is provided, thereby has changed the original mode of oscillation of suspension cable, realizes restraining the purpose of Inclined Cable Vibration; The big I of damper damping force is carried out the wide cut adjustment according to the vibration characteristics of suspension cable, its effectiveness in vibration suppression is remarkable, be specially adapted to the vibration absorber of various long span stayed-cable bridges as suspension cable, simultaneously it also has long service life, is easy to manufacture, installation, maintenance and to advantages such as the landscape impact of cable stayed bridge are little.
Description
Affiliated technical field
The present invention relates to a kind of built-in air energy-eliminating shock-absorbing damper that is used to be installed on cable stayed bridge suspension cable or the sling of suspension bridge, its major function is in order to reduce the Oscillation Amplitude and the acceleration of the suspension cable in running order effectively.
Background technology
With the cable stayed bridge is example, suspension cable is the important stressed hardware of cable stayed bridge upper tank beam, the making of suspension cable and mounting cost generally account for 10%～25% of cable stayed bridge total cost, if shortening or accidental damage significantly in the normal application life of suspension cable, will cause enormous economic loss and bad social influence, so suspension cable energy-eliminating shock-absorbing technology is again the crucial application technology of cable stayed bridge.
Suspension cable places among the extraneous natural environment for a long time, stand to expose to the sun and rain, the continuous test of high temperature, severe cold and day and night temperature, and its condition of work is abominable unusually.Particularly suspension cable very easily produces vibration under the comprehensive function of factors such as wind and rain load and vehicular impact load; the destruction that the additional force that is produced by vibration very easily causes the overtired and outer protection layer of suspension cable; so in the design or use of big-and-middle-sized cable stayed bridge suspension cable; should consider on the appropriate location of suspension cable, select and install corresponding energy-eliminating shock-absorbing damper for use.Suspension cable energy-eliminating shock-absorbing damping unit (being called for short " damper ") is mounted in the mill auxiliaries device on the suspension cable, its mainly act on be absorb or conversion because of the energy that various natural causes cause Inclined Cable Vibration to produce, guarantee suspension cable safe operation under design conditions.
The damping measure that is used for energy dissipating of cable stayed bridge suspension cable and vibration damping mainly is divided into aerodynamic Measures, auxiliary (rope) rope measure, mechanical damping measure three major types type; Wherein the mechanical damping measure can be divided into built-in damping unit and external damping unit two big series again.At present both at home and abroad the built-in damping unit of widespread usage mainly contains three kinds of citation forms on the cable stayed bridge suspension cable, their common feature is exactly the vibration displacement that utilizes suspension cable, produce the damping force opposite with the Inclined Cable Vibration direction of motion, remake conversely and be used for suspension cable, thereby reach the purpose that suppresses Inclined Cable Vibration; The core component of internal damper generally is installed between suspension cable and the steel pipe bearing, and the difference between the different internal dampers is that mainly its form or machine work principle that produces damping force has nothing in common with each other.Through consulting built-in energy dissipating and the scientific achievement of damper or the technical data of product that is used on the cable stayed bridge, now briefly introduce the operating principle of representative internal damper and the result of use of preliminary investigation as follows both at home and abroad:
The be otherwise known as general work principle of " oil damper " of fluid pressure type damper (Fig. 2): this damper mainly is made up of connector, hydraulic unit and steel pipe bearing etc.; The shell of hydraulic unit generally is fixed on the steel pipe bearing, suspension cable links to each other with the metallic piston bar of hydraulic unit by connector, the vibration displacement of suspension cable is broken the original pressure balance in hydraulic unit interior metal piston two ends and the resistance that produces, be that damper is a damping force, after this damping force reacts on suspension cable, can reach the purpose of suspension cable vibration damping.If fluid pressure type damper combined sensor, controller and oil pump use, promptly be called " active spoiler " or be called " intelligent damper "; For damper without external power supply and oil pump, generally be called " passive type damper " or " plain edition damper ", fluid pressure type damper great majority are made the external damper.With France and damper professional equipment manufacturer such as Switzerland produce and the characteristic of this series products of providing as a reference, its advantage is that the size adjustment of damping force is easier to, shortcoming is the overall appearance of volume considerable influence city cable stayed bridge.
Rubber type damper (Fig. 3) general work principle: this damper mainly is made up of interior outconnector, rubber column and steel pipe bearing etc.; One end of rubber column links to each other with suspension cable by female connector, the other end links to each other with the steel pipe bearing by outconnector, the vibration displacement of suspension cable causes the body of rubber column to change, and rubber column is the vibration damping power of suspension cable for keeping the corresponding restoring force that produces of original form.With damper professional equipment manufacturers such as Germany produce and the characteristic of this series products of providing as a reference, its advantage is simple in structure, shortcoming is that the damping force adjusting range is little, precision is not high.
Metal friction chip damper (Fig. 4) general work principle: this damper mainly is made up of interior outconnector, metal friction sheet and steel pipe bearing etc.; Movable " moving metal friction sheet " is connected with suspension cable by female connector, " the quiet metal friction sheet " fixed is connected with the steel pipe bearing by outconnector, the damping force of damper is the frictional resistance of " moving metal friction sheet " and " quiet metal friction sheet ", and the size of frictional resistance is to regulate by the screw rod that is installed on the quiet metal friction sheet.With Switzerland relevant damper professional equipment manufacturer produce with the characteristic of this series products that provides as a reference, its advantage is that work is reliable, shortcoming be involve great expense, each maintenance time is longer.
External damper (Fig. 5) general work principle: this damper mainly is made up of connector, hydraulic unit and metal machine frame etc.; The metal shell great majority of hydraulic unit adopt bolt to be fixed on the metallic support (or title " pedestal "), its piston rod links to each other with suspension cable by connector, the vibration of suspension cable conducts to hydraulic unit by connector, the damping force that hydraulic unit provides reacts on suspension cable, thereby reaches the purpose of vibration damping.The core component of external damper adopts hydraulic unit usually, also can select magnetorheological parts or be made up of the mechanical spring part for use.
Above-mentioned various damper all is that the form with " point " is connected with suspension cable basically, can not be fully and the vibration performance of suspension cable be complementary the effect that has even can not reach vibration damping.
Summary of the invention
At present on cable stayed bridge comparatively the internal damper of widespread usage be fluid pressure type damper and metal friction chip damper, they all respectively have the mechanical property of himself uniqueness with not enough; Fluid pressure type damper for example, when suspension cable during in low frequency vibration, the damping force of its damper is less, and vibration frequency is higher or vibration acceleration when big, the damping force of its damper is very big, is equivalent to braking; Other damping force as metal friction chip damper is difficult to quantize; The adjustment of rubber type damper damping force is difficult to be complementary with the vibration displacement of suspension cable; The magnetic rheology type damper need consume certain electric energy etc.In order to overcome domestic and international internal damper in the existence deficiency aspect the operation and maintenance, what the present invention proposed is the built-in air energy-eliminating shock-absorbing damper that a kind of brand-new damping mechanical property and Inclined Cable Vibration characteristic without external power supply adapts.
The technical scheme that the present invention is adopted for the technical solution problem is: the nuisance vibration of suspension cable is passed to connector, lower connector and air bag by hub in rubber sheath and the metal, air bag is support with the steel pipe bearing, it is that damping force remakes and is used for suspension cable that negative side's active force is provided, change the original mode of oscillation of suspension cable, thereby reached the purpose of the energy-eliminating shock-absorbing of suspension cable.The rubber sheath is installed in the inboard of hub in the metal, and with metal outside hub, go up on the height that connector, lower connector and air bag together be installed in the design vibration damping point of suspension cable and designing requirement; Metal outside hub is installed on the flange of steel pipe bearing by connecting bolt; The steel pipe bearing is fixed on cable stayed bridge (steel or the concrete) bridge floor by the mode of bolt or welding; The operating pressure of air bag can be regulated and show to air valve and air gauge; Rain cover is installed on the steel pipe bearing by hold-down screw, prevents that damper from suffering the erosion of rainwater.
The fundamental characteristics of the built-in air energy-eliminating shock-absorbing damper that the present invention proposes, in the Inclined Cable Vibration process, to push and cause the last connector of its direction of motion side and lower connector to produce distortion, the big young pathbreaker of deflection (Δ ξ) be depended on the inner gas pressure of air bag; The factory length (L) of hub, metal outside hub is directly proportional in the size of air type damper damping force and the inner gas pressure of air bag and the metal; The inner gas pressure of air bag is big more, and the factory length (L) of hub, metal outside hub is long more in the metal, and promptly the integral damping power of damper is just big more; The air pressure of air bag can be regulated by external aerating device and air valve, so the damping force of built-in air type damper can be carried out Field adjustment according to designing requirement or according to on-the-spot mode of occupation, can show that exactly operating pressure-the correspondence of air bag reflects the size of the actual damping force of damper by the air gauge that is installed on the air valve simultaneously.
The invention has the beneficial effects as follows: unique damping characteristic of local compliance that built-in air energy-eliminating shock-absorbing damper shows and integral rigidity, can keep basically identical with the intrinsic mechanical property and the vibration performance of suspension cable, realization produces omnibearing damping action to the various mode of oscillations of suspension cable, finally reaches the purpose of energy-eliminating shock-absorbing.The all material of built-in air energy-eliminating shock-absorbing damper and device all can be realized buying, processing and make that it is simple in structure at home, and installation and working service are simple and easy, dependable performance and long service life.It has not only broken external monopolization and blockade on large-scale suspension cable damper technique, has also increased the kind that domestic big-and-middle-sized cable stayed bridge is selected the suspension cable damper.Because large-scale suspension cable damping unit that can substituting import one, so following one obtain good economic benefits and social benefit surely.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a sectional structural map of the present invention.
Fig. 2 is a fluid pressure type damper sectional drawing.
Fig. 3 is a rubber type damper sectional drawing.
Fig. 4 is a metal friction chip damper sectional drawing.
Fig. 5 is an external damper sectional drawing.
Among Fig. 1: 1. rubber sheath, 2. hub in the metal is 3. gone up connector, 4. air bag, 5. metal outside hub, 6. lower connector, 7. rain cover, 8. air valve, 9. air gauge, 10. hold-down screw, 11. connecting bolts, 12. steel pipe bearings.
The specific embodiment
In the embodiment shown in fig. 1, rain cover (7) is installed on the steel pipe bearing (12) by hold-down screw (10); Rubber sheath (1) is installed in the inboard of hub (2) in the metal, and together is installed on the height of the design vibration damping point of suspension cable and designing requirement; Metal outside hub (5) is installed on the flange of steel pipe bearing (12) by connecting bolt (11); Steel pipe bearing (12) adopts the mounting means of bolt or welding to be fixed on cable stayed bridge (steel or the concrete) bridge floor; Last connector (3) and lower connector (6) are installed in respectively between interior hub (2) metal outside hub (5) of metal; In the space that air bag (4) is installed in hub (2) in the metal, metal outside hub (5), goes up connector (3), lower connector (6) surrounds; Last connector (3), lower connector (6) are rubber; In the Inclined Cable Vibration process, will push and cause the last connector (3) of its direction of motion side and lower connector (6) to produce distortion, the big young pathbreaker of deflection (Δ ξ) is depended on the inner gas pressure of air bag (4); The factory length (L) of hub (2), metal outside hub (5) is directly proportional in the inner gas pressure of the size of damper damping force and air bag (4) and the metal; The air pressure of air bag (4) can carry out Field adjustment by external aerating device and air valve (8), and the inner gas pressure of air bag (4) is big more, and the factory length (L) of hub (2), metal outside hub (5) is long more in the metal, and promptly the integral damping power of damper is just big more; Air valve (8) is connected with air bag (4) with air gauge (9), and operating pressure-correspondence that air gauge (9) can demonstrate air bag (4) reflects the size of the actual damping force of damper, and the inner gas pressure of air bag (4) generally is controlled at 0.1～15kg/cm
2Between; The deflection of last connector (3) and lower connector (6) (Δ ξ) generally is controlled between 0.5～500mm; The factory length (L1) of hub (2), metal outside hub (5) generally is not more than 20m in the metal; The factory length (L2) of steel pipe bearing (12) is not more than 30m, 10cm≤diameter≤150cm; The adjusting range of built-in air energy-eliminating shock-absorbing damper damping force: 0.5～100kN.
Claims (6)
1, a kind of built-in air energy-eliminating shock-absorbing damper, connect and compose by hub, metal outside hub, last connector, lower connector, air bag, air valve, air gauge, steel pipe bearing, rain cover, screw and bolt in rubber sheath, the metal, it is characterized in that the rubber sheath is installed in the inboard of hub in the metal, and together be installed on the height of the design vibration damping point of suspension cable and designing requirement; Metal outside hub is installed on the flange of steel pipe bearing by connecting bolt; The steel pipe bearing adopts the mounting means of bolt or welding to be fixed on the cable stayed bridge bridge floor; Last connector and lower connector are installed between the interior hub of metal, the metal outside hub; In the space that air bag is installed in hub in the metal, metal outside hub, goes up connector, lower connector surrounds; Rain cover is installed on the steel pipe bearing by hold-down screw; Air valve is connected with air bag with air gauge.
2, built-in air energy-eliminating shock-absorbing damper according to claim 1 is characterized in that the inner gas pressure control range of air bag: 0.1～15kg/cm
2
3, built-in air energy-eliminating shock-absorbing damper according to claim 1 is characterized in that connector and lower connector are rubber, its deflection (Δ ξ) control range: 0.5～500mm.
4, built-in air energy-eliminating shock-absorbing damper according to claim 1 is characterized in that the factory length of hub, metal outside hub in the metal is not more than 20m.
5, built-in air energy-eliminating shock-absorbing damper according to claim 1 is characterized in that the factory length of steel pipe bearing is not more than 30m, 10cm≤diameter≤150cm.
6, built-in air energy-eliminating shock-absorbing damper according to claim 1 is characterized in that the adjusting range of built-in air energy-eliminating shock-absorbing damper damping force: 0.5～100kN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100401178A CN100572670C (en) | 2006-05-08 | 2006-05-08 | Built-in air energy-eliminating shock-absorbing damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100401178A CN100572670C (en) | 2006-05-08 | 2006-05-08 | Built-in air energy-eliminating shock-absorbing damper |
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| Publication Number | Publication Date |
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| CN101070693A CN101070693A (en) | 2007-11-14 |
| CN100572670C true CN100572670C (en) | 2009-12-23 |
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| CNB2006100401178A Expired - Fee Related CN100572670C (en) | 2006-05-08 | 2006-05-08 | Built-in air energy-eliminating shock-absorbing damper |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260646B (en) * | 2008-04-14 | 2010-10-13 | 李有为 | Great span bridge lower damper system for wind and water resistance |
| CN101550733B (en) * | 2009-05-07 | 2010-12-01 | 同济大学 | Stay cable end elastic constraint vibration controlling device |
| CN102518040B (en) * | 2011-11-23 | 2013-11-20 | 深圳大学 | Shock absorption damping device for bridge cable or suspender |
| CN103161235B (en) * | 2013-03-07 | 2015-06-24 | 同济大学 | Flexural type inhaul cable particle damper |
| CN106012835B (en) * | 2016-05-12 | 2019-06-11 | 武汉泽瑞环科技开发有限公司 | A kind of Cable Structure antivibration protective device based on circumferential wirerope |
| CN105951596B (en) * | 2016-05-23 | 2018-04-13 | 长安大学 | Stay cable internal damper |
| CN106012833A (en) * | 2016-07-19 | 2016-10-12 | 株洲市完全科技有限公司 | Anticorrosion and waterproof method for bridge stay cable anchoring end and end sealing device |
| CN107327041B (en) * | 2017-08-18 | 2019-06-28 | 温州市万丰建设工程有限公司 | A kind of Antiseismic house builds structure |
| CN110359370B (en) * | 2019-07-17 | 2021-02-02 | 广东迈诺工业技术有限公司 | Inhaul cable with sealing structure rain cover and manufacturing method thereof |
| CN111796611B (en) * | 2020-07-17 | 2022-03-04 | 同济大学 | Control method for multi-mode vibration of inhaul cable |
| CN112853939B (en) * | 2021-03-25 | 2023-04-07 | 深圳大学 | Bridge self-adaptive wind vibration suppression device |
| CN115324982B (en) * | 2022-08-26 | 2024-03-26 | 中国人民解放军海军工程大学 | Self-adaptive hydraulic silencing device |
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2006
- 2006-05-08 CN CNB2006100401178A patent/CN100572670C/en not_active Expired - Fee Related
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Granted publication date: 20091223 Termination date: 20110508 |